CN114831213B - Preparation method and preparation system of fresh skin chew - Google Patents

The invention discloses a preparation method and a preparation system of a fresh skin chew, wherein the preparation method comprises the steps of freezing, thawing, cleaning, layering, cutting and forming, drying, sterilizing and the like. The preparation system of the invention uses fresh skin as raw material, adopts a mechanical dehairing mode to divide the fresh skin into a first skin layer and a second skin layer by using layering equipment. The preparation method of the invention does not undergo any chemical process treatment and does not contain any chemical substances harmful to pets. The nutrients of the pure natural fresh skin are not damaged, and the product is rich in nutrition. The main nutrient substance of the fresh cowhide is collagen, and the product is more beneficial to the health of pets. The fresh skin chew has rich beef flavor, and the product can better induce the appetite of pets and has stronger palatability.

Preparation method and preparation system of fresh skin chew

Technical Field

The invention relates to a preparation method and a preparation system of a fresh skin chew, belonging to pet foods.

Background

The traditional pet chew mainly comprises two layers of gray skins. In order to facilitate storage, the pet chew is salted by salt to remove water. For dehairing and layering of salted skin, the following processing technology is carried out: soaking ash, dehairing, deliming, pretreatment, washing, sewing and airing. The existing technology uses chemical raw materials such as quick lime, ammonia chloride, sodium sulfide, hydrogen peroxide, sulfuric acid and the like to soften, dehairing, deashing, bleaching and the like. The pollution amount of the dehairing process is 50% -60% of the total pollution amount of tanning, the pollution indexes of the dehairing process are sulfide, chemical Oxygen Demand (COD), biochemical oxygen demand (BOD 5), total Dissolved Solids (TDS), total suspended matters (TSS) and the like, and the prepared chew product contains sulfide metal residues. Therefore, the traditional biting gum changes the original characteristics of original skin under the condition of using a large amount of chemical raw materials, has poor palatability, changes the molecular structure of the skin, is not resistant to biting, and has a plurality of heavy metal residues, thereby affecting the health of pets. In addition, a large amount of water is used, chemical raw materials are treated and cleaned, a large amount of water resources are wasted, and the chemical raw materials are used to pollute the environment. In addition, the inventors have proposed an enzymatic dehairing technique as described in CN107099622B, CN101235422B, CN102134618A et al. However, there is still a possibility that the chemical residue exceeds the standard in this depilation technique. Accordingly, there is a need for further improvements in the art of chew products.

Disclosure of Invention

The invention provides a preparation method of a fresh skin chew, which is characterized in that fresh skin is used as a chew raw material, mechanical dehairing is adopted, a chemical dehairing process is avoided, any chemical residues are avoided, and the palatability and the color of the chew are ensured. The invention further provides a preparation system of the fresh skin biting gum, and the system uses a mechanical skin cutting and unhairing technology.

The technical scheme of the invention is realized as follows:

the preparation method of the fresh skin chew is characterized by comprising the following steps:

freezing: delivering the fresh skin into a freezer for freezing and preserving;

thawing: thawing the frozen fresh skin;

cleaning: sending fresh skin into a rotary drum for cleaning with clear water;

layering: dividing the washed fresh skin into a first skin with hair and a second skin without hair;

cutting and shaping: cutting two layers of cowhide and manufacturing into semi-finished products;

and (3) drying: baking the prepared semi-finished product at 40-60 ℃ for 12-48 hours;

sterilizing: and (3) drying, finishing and sterilizing at 70-100 ℃ for 6-8 hours.

The preparation method of the fresh skin chew of the invention also comprises a rolling step, wherein the layered two layers of skin are sent into rolling equipment, and are cut into semi-finished products after antioxidant and food additive are added. The antioxidant comprises tea polyphenols, butyl hydroxy anisole, dibutyl hydroxy toluene or their composition, tea polyphenols content is not more than 0.03%, butyl hydroxy anisole or dibutyl hydroxy toluene content is not more than 0.02%, the food additive comprises vitamins and trace mineral elements, the content of said vitamins is 0.05% to 0.1%, and the content of trace mineral elements is 0.03% to 0.2%. The additive of the invention can keep the color of the two layers of skins, improve the quality guarantee time and have no harmful residues.

The preparation method of the fresh skin biting gum further comprises a sun-drying step, wherein the rolled and kneaded two layers of skin are naturally light-dried and then cut into semi-finished products.

In the preparation method of the fresh skin biting gum, the fresh skin is fresh cowhide; the cowhide has high nutritive value, mainly is a kind of collagen, and the macromolecule collagen is easy to be absorbed by human body after being processed; secondly, the cowhide glue has a certain effect on improving human nutritional anemia and has an effect on improving the constitution of anemic eaters.

In the preparation method of the fresh skin biting gum, in the layering step, a layering device is adopted to divide a first layer of skin and a second layer of skin; the thickness of the blade cut is based on that pores and black spots are not formed on the two layers of skin.

In the preparation method of the fresh skin chew, the temperature of the freezing step is between-20 ℃ and-15 ℃, and the temperature of the thawing step is between 10 ℃ and 25 ℃; the thawing temperature is required not to grow bacteria.

In the preparation method of the fresh skin chew provided by the invention, the thickness of one layer of skin with hair is 0.5-2 mm.

A system for preparing a fresh skin chew comprising:

the freezing equipment is used for freezing and preserving the fresh skin and comprises at least one freezing warehouse;

the cleaning equipment is used for cleaning the fresh skin and comprises at least one rotary drum;

the layering equipment is used for dividing the washed fresh skin into a first skin layer with hair and a second skin layer without hair;

the cutting equipment is used for cutting the two layers of cowhides and manufacturing the cowhides into semi-finished products;

drying equipment for drying the semi-finished product at 40-60 ℃ for 12-48 hours;

a sterilizing device for sterilizing at 70-100deg.C for 6-8 hours, wherein,

the layering equipment comprises two side clamping assemblies for fixing the fresh skin, a driving device for leveling the fresh skin and a two-layer skin cutting blade for dividing the fresh skin into a first layer skin with hair and a second layer skin without hair.

In the present invention, the layering device further includes:

the lifting assembly is divided into a first lifting assembly and a second lifting assembly, the first lifting assembly is provided with a feeding roller, the layering equipment is provided with a cutting blade, and the blade is positioned in the second lifting assembly;

the clamping assembly is provided with a first synchronous belt and a second synchronous belt, the second synchronous belt is positioned in the first synchronous belt, and the outer surface of the second synchronous belt is connected with the inner surface of the first synchronous belt;

the driving device is provided with a first transmission assembly and a second transmission assembly, and the driving device and the clamping assembly are matched to operate.

The fresh skin chew of the invention is a natural and safe pet chew which is directly processed by taking fresh skin as a raw material and mechanically splitting. The preparation method of the invention does not undergo any chemical process treatment, does not contain any chemical substances harmful to pets, and is more natural and safer. The nutrients of the pure natural fresh skin are not damaged, and the product is rich in nutrition. The main nutrient substance of the fresh cowhide is collagen, and the product is more beneficial to the health of pets. The fresh skin chew has rich beef flavor, and the product can better induce the appetite of pets and has stronger palatability. The protein content of the prepared fresh skin biting gum can reach 34.81 percent or even higher. The shearing force of the fresh skin biting gum is 23.45+/-2.01 and N, and the fresh skin biting gum has a certain chewing taste and meets the requirements of pet foods. The clamping assemblies are arranged on the two sides of the fresh leather, the driving device can level the fresh leather in opposite directions, the thickness of the fresh leather can be cut by controlling the relaxation degree of the fresh leather, and uneven cutting caused by fresh leather folds is avoided.

Drawings

FIG. 1 is a flow chart of a method for preparing a fresh skin chew of the present invention;

FIG. 2 is a schematic illustration of a finished fresh skin chew of the present invention;

FIG. 3 is a schematic diagram of a layering device for use with the present invention;

FIG. 4 is a graph showing the variation of the drying temperature of the fresh skin chew according to the present invention with palatability;

FIG. 5 is a graph showing the variation of bromelain injection amount with palatability for a fresh skin bite according to the present invention;

FIG. 6 is a graph showing the change in transglutaminase cross-linking time with palatability for a fresh skin chew of the present invention;

fig. 7 is a schematic structural diagram of a layering device of the present invention:

FIG. 8 is a schematic view of the structure of a feed roll in a layering device of the present invention:

FIG. 9 is a schematic view of a portion of the structure of a left side view of the layering device of the present invention:

fig. 10 is a schematic structural diagram of a first lifting assembly in the layering device according to the present invention:

FIG. 11 is a schematic view of the structure of the clamping assembly in the layering device of the present invention:

fig. 12 is a schematic structural view of a clamping assembly in the layering device of the present invention:

fig. 13 is a schematic structural view of a driving device in the layering apparatus of the present invention:

fig. 14 is a schematic structural view of a driving device in the layering apparatus of the present invention:

fig. 15 is an enlarged partial schematic view of the driving means in the layering device of the present invention.

In the figure: layering device 2, base 21, servo motor 22, turntable 23, blade 24, drive 30, first support plate 31, second support plate 32, left connection plate 33, right connection plate 34, drive rod 35, slider 36, first motor 37, first drive assembly 38, second drive assembly 39, slider 40, first drive block 41, second drive block 42, first drive belt 43, second drive belt 44, first gear 45, second gear 46, vertical shaft 47, first conical gear 48, second conical gear 49, third conical gear 50, first lifting assembly 51, second lifting assembly 52, clamping assembly 53, upper feed roller 54, lower feed roller 55, second motor 56, first mounting plate 57, second mounting plate 58, air cylinder 59, rotating wheel 60, crankshaft 61, thickness sensor 62, male mount 63, fixed mount 64, slide 65, 66, first timing belt 67, first driven shaft 68, second driven shaft 69, drive shaft 70, connecting rods 71, 72, second timing belt 73.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The preparation method of the fresh skin biting gum shown in fig. 1 to 6 adopts fresh cowhide as a main raw material and adopts a physical and mechanical dehairing process to avoid chemical residues caused by chemical dehairing.

Step 1, freezing: the fresh skin is sent into a freezing warehouse for freezing and preservation, and the temperature of the freezing step is between minus 20 ℃ and minus 15 ℃. The invention uses fresh cowhide, which is obtained directly from slaughtered animals, and ensures that the material is not subjected to any chemical treatment. The cow leather has high nutritive value, and the macromolecular collagen is easy to be absorbed by human body after being processed.

Step 2, thawing: thawing the frozen fresh skin at normal temperature, which is usually 10-25deg.C, without bacteria.

Step 3, cleaning: fresh skin is sent into a rotary drum to be cleaned by clean water, stains and soil of the fresh skin are washed away in the cleaning process, and the blade during cutting is prevented from being blocked. The washing time is 4 to 5 hours.

Step 4, layering: the cleaned fresh skin is divided into a first skin with hair and a second skin without hair. As shown in fig. 3, the present invention employs a layering device to divide a first layer of skin and a second layer of skin. The layering device 2 comprises a base 21, a servo motor 22, a turntable 23 and a blade 24. The motor drives the turntable, and the blade is arranged on the turntable. The fresh skin is placed on the base, and the blade cuts off the head skin of the fresh skin. The thickness of the blade cut is based on that pores and black spots are not formed on the two layers of skin.

Step 5, cutting and forming: cutting two layers of cowhide and making into semi-finished product. According to the needs of customers, the utility model can be cut into different shapes such as strip, square, bone, etc.

Step 6, drying: and (5) sending the manufactured semi-finished product into a drying room at 40-60 ℃ to be dried for 12-48 hours. As shown in figure 4, the influence of different drying temperatures on the color and the palatability required by the fresh skin is different, and the best effect can be obtained at 40-60 ℃ and the best value is 49 ℃ through experimental analysis of the inventor.

Step 7, sterilizing: and (5) after drying, finishing and then sending into a sterilizing room at 70-100 ℃ for 6-8 hours for sterilization.

According to the product requirement, rolling and sun drying steps can be added after layering. The layered two layers of skin are sent into rolling equipment, and after antioxidant and food additive are added, the semi-finished product is made by cutting. The additive can maintain the color of the two layers of skins, improve the quality guarantee time and have no harmful residues. The rolled two layers of skin are naturally light-dried and then cut into semi-finished products.

In order to further improve the palatability, 0.50% bromelain and 0.15% food grade compound phosphate solution can be added, the temperature is kept at 55 ℃ for 1.5 hours, and then the transglutaminase liquid is added for 1.5 hours at 50 ℃. After the fresh cowhide is tenderized by utilizing bromelain, the fresh cowhide is crosslinked by utilizing transglutaminase, the gel property and stability of beef protein are enhanced, the gel forming speed is high, the strength of the fresh cowhide can be improved, and the meat quality gel structure of the cowhide biting gum is uniform. Referring to FIGS. 5 and 6, the optimum effect can be achieved by injecting bromelain in an amount of 4% and a transglutaminase crosslinking time of 40 min.

As shown in fig. 7 to 12, this preparation system of the present invention is dedicated to the preparation of fresh skin, especially fresh cow leather bite. The preparation system adopts mechanical dehairing to avoid chemical residues. In particular, the preparation system comprises a freezing device, so that the fresh cowhide can be subjected to a freezing effect in the freezing device, the fresh cowhide is stored in the freezing device, and the freezing device comprises at least one freezing warehouse. The method comprises the steps of cleaning fresh cowhide, putting the fresh cowhide into a freezing chamber for freezing, and putting the fresh cowhide in a freezing state after passing through a freezing device and in a low-temperature environment, so that the freshness of the fresh cowhide can be effectively maintained. The defrosted fresh cowhide is subjected to a subsequent operation in a washing apparatus for washing the fresh cowhide, the washing apparatus comprising at least one drum. The fresh cowhide turns inside or washes fur inside during the drum process. Placing the cleaned fresh cowhide into layering equipment for dividing the cleaned fresh cowhide into a first layer of fur-bearing leather and a second layer of fur-bearing leather. The thickness of the blade cut is based on that pores and black spots are not formed on the two layers of skin. After the fresh cowhide is divided, the two layers of cowhide are cut in a cutting device and made into semi-finished products after subsequent cutting. The prepared fresh cowhide is placed in a drying device, dried and used for drying the semi-finished product for 12-48 hours at 40-60 ℃. After the fresh cowhide is cut and baked, bacteria which are difficult to eliminate remain inside the fresh cowhide. The fresh cowhide is sterilized in a sterilizing device for 6-8 hours at 70-100deg.C.

It will be appreciated by those skilled in the art that the thawing temperature of the present invention is 10℃to 25 ℃. The invention is therefore not limited to thawing apparatus. When the fresh cowhide is in the freezer, it is removed for further processing and thawed. The fresh cowhide is in a frozen state, so that the fresh cowhide cannot be directly subjected to subsequent processing operation. In the preparation method of the invention, the thawing temperature of the fresh cowhide is 10 ℃ to 25 ℃, and the thawing temperature is controlled to be 10 ℃ to 25 ℃ in the thawing process. The daily temperature in real life can reach the defrosting temperature required by fresh cowhide, especially in spring and autumn in south area, natural defrosting can be adopted for the defrosting, resources of equipment can be reduced, and specific effects on fresh cowhide in the defrosting process can be effectively observed. If the season is day that the fresh cow leather defrosting temperature is not suitable, simple defrosting equipment can be adopted to defrost the fresh cow leather. If too high a temperature is adopted during thawing, the fresh cow leather has the result of damaging the tissue, which is disadvantageous in the subsequent processing operation of the fresh cow leather. The thawing temperature during thawing is required to be free from bacteria.

The preparation system adopts mechanical dehairing, and the fresh cowhide is not treated by any chemical process through the mechanical dehairing, so that the fresh cowhide does not contain any chemical substances harmful to pets, and the product is more natural and safer. The nutrients of the pure natural fresh skin are not damaged, and the product is rich in nutrition. Thus, the mechanical epilation delamination apparatus used in the preparation system of the invention is further described.

The upper end of the layering equipment 2 arranged in the preparation system is provided with a feeding component. The feed assembly has a first mounting plate 57 and a second mounting plate 58, and the feed assembly is also provided with a lifting assembly. The lifting assembly has a first lifting assembly 51 and a second lifting assembly 52, the first lifting assembly 51 is provided with a feed roller comprising an upper feed roller 54 and a lower feed roller 55, the lower feed roller 55 is fixedly mounted between a first mounting plate 57 and a second mounting plate 58, and is movably mounted through a movable shaft sleeve provided.

The upper feed roller 54 is installed in the first elevating assembly 51, and elevating movement is achieved by control of the upper feed roller 54 by the first elevating assembly 51. The first lifting assembly 51 is provided with a slideway 65 and a sliding block, the upper end of the sliding block is provided with an air cylinder 59, the air cylinder 59 is fixedly arranged on a fixed plate through a bolt, wherein the sliding block is positioned on the other surface of the fixed plate, and the sliding block is positioned on the slideway 65 and is connected with the air cylinder 59 through a shaft. The slider is block-shaped and a through hole is provided in the slider for mounting the upper feed roller 54 so as to achieve lifting.

After the fresh hide is placed on the feed rolls at the feed assembly, the upper feed roll 54 drops downward, creating a tendency for the lower feed roll 55 to contact, exerting a force on the lower feed roll 55 to bite the fresh hide into. A second motor 56 is arranged at the second mounting plate 58, and the lower feeding roller 55 is operated by the second motor 56 to push the engaged fresh cowhide into the layering equipment 2. The upper feeding roller 54 is composed of a bidirectional screw rod, when the fresh cowhide is pushed, the fresh cowhide contacted with the upper feeding roller 54 can generate two opposite forces at two ends of the upper feeding roller 54, and has an outward stretching effect on the fresh cowhide, so that the fresh cowhide belt which is originally uneven has a leveling state, and the fresh cowhide belt is convenient for subsequent cutting.

The both ends of layering equipment 2 are equipped with clamping assembly 53 respectively, after carrying fresh cow hide from the pay-off subassembly, the front end of fresh cow hide contacts the clamping assembly 53 that layering equipment 2 both ends were equipped with. The clamping assembly 53 is provided with a second timing belt 73, and the second timing belt 73 can move downwards to enable the clamping assembly 53 to cling to the fresh cowhide and generate pressure on the fresh cowhide, and meanwhile, the clamping assembly 53 can push the fresh cowhide forwards. The clamping assembly 53 is internally provided with a first synchronous belt 67, the surface of the first synchronous belt 67 is in direct contact with fresh cowhide, a transmission shaft 70, a first driven shaft 68 and a second driven shaft 69 are arranged in the first synchronous belt 67, one end of the first driven shaft 68 is provided with a convex seat 63, and the second synchronous belt 73 is positioned in the first synchronous belt 67. The second synchronous belt 73 is provided with a second synchronous belt 73, the outer surface of the second synchronous belt 73 is connected with the inner surface of the first synchronous belt 67, a connecting rod 71 is arranged in the second synchronous belt 73, the connecting rod 71 is movably arranged on the convex seat 63, the lower end of the connecting rod 71 connected between the convex seat 63 and the second synchronous belt 73 is provided with a cylinder 59, and the cylinder 59 provides a lifting driving force for the second synchronous belt 73.

The male seat 63 is connected with the first driven shaft 68 and the connecting rod 71, a fixed seat 64 is arranged at the front end of the male seat 63, the fixed seat 64 is connected with a second driven shaft 69 and a transmission shaft 70, the second driven shaft 69 is movably mounted, and a driving device (not shown in the figure) is arranged at the transmission shaft 70 for driving the transmission shaft 70. The fixed shaft 72 is provided at the lower end of the fixed seat 64, and is fixedly coupled to the second support plate 32 through the fixed shaft 72. The convex seat 63 is provided with the sliding block 36 for enabling the second synchronous belt 73 to lift, when the convex seat 63 moves downwards, the connecting rod 71 drives the second synchronous belt 73 to move downwards, the first driven shaft 68 arranged at the upper end of the clamping assembly 53 moves along with the downward movement of the convex seat 63, loss of the synchronous belt is reduced, linkage is achieved, the second synchronous belt 73 is connected with the connecting rod 71 in a meshed mode, the second synchronous belt 73 is connected with the first synchronous belt 67 in a contact mode, and when the first synchronous belt 67 operates, the second synchronous belt 73 is driven to move along with the movement to achieve flexible control.

As shown in fig. 13 to 15, the bottom of the layering device is provided with a driving means 30. The driving device provided by the invention can realize the driving of the cutter and the leveling of leather, and has a compact structure. The drive device 30 has a first transmission assembly 38 and a second transmission assembly 39 and a left and a right connecting plate 33, 34. The connecting plates are provided with a plurality of through holes, transmission rods 35 are arranged at the through holes, and the left connecting plate 33 and the right connecting plate 34 are connected through the transmission rods 35. The right connecting plate 34 is provided with a first motor 37, the first motor 37 is connected with a first transmission assembly 38, and a fixing assembly is arranged at the connecting position and fixes the first transmission assembly 38 and a second transmission assembly 39.

The first transmission assembly 38 has a first bevel gear 48 and a first gear 45, and the first motor 37 is connected to the first gear 45 through a shaft and fixes the first bevel gear 48 at one end of the shaft. The first gear 45 is provided with a first driving belt 43, the first driving belt 43 is provided with a first driving block 41, the first driving block 41 is engaged with the first driving belt 43, and the first driving block 41 is provided with a bolt. The upper end of the driving device 30 is provided with a first supporting plate 31 and a second supporting plate 32, and the first supporting plate 31 and the second supporting plate 32 are fixedly connected with the driving device 30 through bolts arranged on the driving block.

The transmission rod 35 is provided with two groups of sliding blocks 36, sliding pieces 40 are arranged in the sliding blocks 36, and lubricating oil can be added to the sliding pieces 40 to increase the driving between the sliding blocks 36 and the transmission rod 35. The sliding block 36 is provided with a plurality of bolt holes, and a notch is arranged at the middle part of the sliding block 36 and is used for fixedly connecting the sliding block 36 and the supporting plate. The first motor 37 drives the first transmission assembly 38 to drive the first transmission belt 43 to operate, the driving block meshed with the first transmission belt 43 follows the transmission belt to operate, the supporting plate arranged on the driving block is driven to move, and the sliding block 36 has a stabilizing and accelerating effect on the movement of the supporting plate, so that the supporting plate moves flexibly and has stability.

The first conical gear 48 is provided with a second conical gear 49, the second conical gear 49 is provided with a vertical shaft 47, the second conical gear is mounted on the fixed assembly through the vertical shaft 47, and meanwhile, the first conical gear 48 is in meshed connection with the second conical gear 49. The other side of the second conical gear wheel 49 is provided with a second transmission assembly 39, the second transmission assembly 39 is provided with a third conical gear wheel 50, and the third conical gear wheel 50 is in meshed connection with the second conical gear wheel 49. The second transmission assembly 39 has a second gear 46, the second gear 46 being located on the rear side of the third conical gear 50 and being connected by a shaft. That is, the first transmission assembly 38 and the second transmission assembly 39 are respectively located at two sides of the second conical gear 49, and the first conical gear 48 and the third conical gear 50 are simultaneously operated in opposite directions by the circumferential operation of the second conical gear 49.

The second gear 46 has a second belt 44 thereon, and the second belt 44 has a second drive block 42 thereon. The first transmission assembly 38 is driven by the first motor 37, the second transmission assembly 39 is driven simultaneously according to the transmission of the second bevel gear 49, and the second assembly is driven in the opposite direction to the first assembly, so that the first support plate 31 and the second support plate 32 respectively provided on the driving block are operated in two different directions at the same time. The support plate provided on the driving device 30 applies a pressing force to the fresh cowhide. Often can put the unevenness because of the elasticity factor of cow hide self on traditional machine and form many peaks valley in the fresh cow hide that is arranged in layering equipment, this can be when cutting fresh cow hide, and machining efficiency reduces. The clamping assemblies 53 arranged on the supporting plates fix the two sides of the fresh cowhide, and the driving device 30 controls the degree required by the supporting plates so that the fresh cowhide is tiled on the supporting plates for cutting. The driving device 30 is leveled in the opposite direction, the thickness of the fresh cowhide can be cut by controlling the relaxation degree of the fresh cowhide, and the fresh cowhide cutting machine is ingenious in design and reasonable in structure.

The layering device 2 is provided with a thickness sensor 62 at a middle end portion thereof, and the thickness sensor 62 is mounted through a crankshaft 61. A wheel 60 is provided at the second mounting plate 58, the wheel 60 being controllable by a thickness sensor 62 and being coupled to the thickness sensor 62 by a drive shaft 70. If the fresh cowhide is found to be in an uneven state, the fresh cowhide can be controlled by the driving device 30 arranged at the lower end of the layering device 2, and after the second synchronous belt 73 arranged on the clamping component 53 applies force to the fresh cowhide, the driving device 30 is started to move the supporting plates arranged at the lower end of the clamping component 53 in opposite directions respectively, so that the fresh cowhide is in a flat state.

When the fresh cowhide is leveled, the fresh cowhide continues to advance, and a cutting blade 24 is arranged at the front end of the layering device 2, the cutting blade 24 is arranged on the second lifting assembly 52, and the second lifting assembly 52 is fixedly installed by a protection plate 66. Accurate cutting of the thickness of the fresh cowhide is achieved by the cooperation of the second lifting assembly 52, which controls the lifting of the blade 24, and the thickness sensor 62.

The working principle of the clamping component 53 and the driving device is that, in the operation process of the layering equipment, fresh cowhide is placed on the upper surface of the lower feeding roller 55, the upper feeding roller 54 moves downwards to bite the fresh cowhide, so that the fresh cowhide is conveyed into the layering equipment, the fresh cowhide is conveyed into the layering equipment to be contacted with the clamping component 53, the clamping component 53 has a pushing effect on the fresh cowhide, if the fresh cowhide is found to be uneven, the second synchronous belt 73 can be pressed downwards, the second synchronous belt and the supporting plate form a clamping state on the fresh cowhide, at the moment, the driving device operates, the supporting plate operates in the opposite direction, the fresh cowhide is leveled, and the thickness sensor 62 arranged at the upper end of the fresh cowhide can detect the thickness of the fresh cowhide, so that the position of the blade can be adjusted, and accurate cutting is realized.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.