Quantitative spreading device and spreading method for wood chip tray production

Abstract

The invention relates to the technical field of mold pressing trays, in particular to a quantitative spreading device and method for wood chip tray production, the quantitative spreading device comprises a weighing hopper, a flattening unit and a spreading unit, the weighing hopper is located above the flattening unit, and the spreading unit is located on one side of the flattening unit; the flattening unit comprises a first conveying belt, a second conveying belt, a first sliding frame and a first support, the weighing hopper is located at the top of the first support, and the first conveying belt is arranged below the weighing hopper; a traditional one-time material spreading mode is changed, the two-time material spreading process that the foot pier part is firstly filled and then the lower die plate face groove part is laid is adopted, the total weight of materials needed by a to-be-pressed tray and the weight of the materials distributed into the foot pier groove and the plate face groove of the lower die are accurately weighed with the help of the first weighing sensor and the second weighing sensor, and the material spreading efficiency is improved. The amount of filling materials in the foot pier groove can be accurately measured, the density and strength of the foot pier are ensured, and the high-strength requirement of the foot pier serving as a force bearing component is met.

Description

Technical Field

[0001] The invention relates to the technical field of molded pallets, and in particular to a quantitative spreading device and a spreading method for producing wood chip pallets. Background Art

[0002] As an important tool in the field of modern logistics and warehousing, molded pallets are widely used in the transportation and storage of goods in the food, pharmaceutical, chemical, electronic and other industries due to their advantages of high strength and low cost. Its core structure consists of a plate surface and a foot pier. The foot pier, as a load-bearing support component, must have excellent compressive strength and stability, while the plate surface is responsible for the function of carrying and distributing the load of goods. The structural integrity and bonding strength of the two directly determine the performance of the pallet.

[0003] At present, the mainstream production process of molded pallets adopts the mold pressing method, which fills the wood chips and thermosetting resin mixture into the mold cavity and solidifies it under high temperature and high pressure. In the mold structure, the lower mold is usually equipped with a foot pier groove for forming the foot pier and a board surface groove for forming the board surface. The foot pier groove is deep and mostly a columnar or block-shaped concave structure, and the board surface groove is a large shallow flat area. The two are three-dimensionally distributed in space, and there is a certain height difference between the bottom of the foot pier groove and the bottom of the board surface groove. The existing paving process generally adopts one-time uniform paving molding, and the mixture is simultaneously filled into the entire lower mold cavity, and the molding is completed by subsequent high-pressure compaction. This traditional one-time paving process exposes structural defects in the integrated forming of the foot pier and the board surface: since the foot pier groove is a deep and narrow structure, while the board surface groove is a shallow and wide area, the material is affected by the uneven distribution of fluid mechanics during the free fall process, resulting in the material stacking density in the deep cavity area (foot pier groove) being only 60%-70% of that in the shallow area (board surface groove), forming a "dense on top and sparse on the bottom" gradient distribution, which cannot meet the high strength requirements of the foot pier as a load-bearing component. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a quantitative paving device and a paving method for wood chip pallet production, and aims to solve the problem in the background technology that the one-time indiscriminate paving leads to the material stacking density in the foot pier groove being lower than the stacking density in the board surface groove, resulting in low foot pier density and weak bearing capacity after molding.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a quantitative paving device for the production of wood chip pallets, comprising a weighing hopper, a flattening unit and a spreading unit, the weighing hopper is located above the flattening unit, the spreading unit is located on one side of the flattening unit, the flattening unit comprises a first conveyor belt, a second conveyor belt, a first slide frame and a first bracket, the weighing hopper is located on the top of the first bracket, the first conveyor belt is arranged below the weighing hopper, the second conveyor belt is installed on the first bracket through the first slide frame, and the second conveyor belt transports materials to the spreading unit.

[0006] Further, a first weighing sensor is provided between the bottom of the first conveyor belt and the first bracket, and a second weighing sensor is provided between the bottom of the first carriage frame and the first bracket.

[0007] Further, the paving unit includes a second bracket, a third conveyor belt, and a second carriage frame. The third conveyor belt is slidably installed on the second carriage frame, and the bottom of the second carriage frame is installed on the second bracket through a lifting assembly.

[0008] Further, three thorns rollers are provided in the weighing hopper, and a servo motor for driving the thorns rollers to rotate is provided on one side of the weighing hopper.

[0009] Further, baffle plates are provided on both sides of the first conveyor belt, the second conveyor belt, and the third conveyor belt. One ends of the baffle plates on both sides of the first conveyor belt are each installed with a retractable blanking plate. The two baffle plates of the first conveyor belt are connected by a screw. One end of the screw passes through one side of the weighing hopper and is installed with a handle, and the other end is rotatably connected to the other side of the weighing hopper. Moreover, a plurality of sliding rods are provided on the top of the first conveyor belt, and the baffle plates and the blanking plates are slidably installed on the sliding rods.

[0010] Further, the second conveyor belt is slidably installed on the first carriage frame. A first lead screw is provided at the bottom of the first carriage frame, and the bottom of the second conveyor belt is threadedly installed on the first lead screw through a first support seat. A first driving motor for driving the first lead screw to rotate is provided on one side of the first carriage frame.

[0011] Further, a second lead screw is provided at the bottom of the second carriage frame, and the bottom of the third conveyor belt is threadedly installed on the second lead screw through a second support seat. A second driving motor for driving the second lead screw to rotate is provided on one side of the second carriage frame.

[0012] Further, the lifting assembly adopts four linked H-type screw jacks, and the lifting of the second carriage frame is realized by driving the four linked H-type screw jacks through a lifting motor.

[0013] Further, a quantitative feeding method for producing a wood chip tray includes the following operation steps: S1: Determine the total weight of the materials required for the tray to be pressed and the weights of the materials required for the lower die foot pier grooves and the plate surface grooves. Weigh the wood chip materials mixed with glue placed in the weighing hopper through the first weighing sensor to weigh the total weight of the materials required for the tray to be pressed. S2: Divide the foot pier grooves in the lower die into multiple columns according to the layout. Uniformly spread the materials in the weighing hopper in step S1 on the first conveyor belt. The materials on the first conveyor belt are transmitted to the second conveyor belt according to the length of each column of foot pier grooves on the lower die, and the weight required for the tray foot piers on the second conveyor belt is weighed through the second weighing sensor. S3: According to the arrangement of the foot pier grooves, transfer the materials on the second conveyor belt in step S2 to the third conveyor belt according to the spacing and number of columns of each column of foot pier grooves, and control the rotation speed and position of the second conveyor belt to transfer the materials; S4: Evenly spread the remaining materials in the weighing hopper 1 in step 2 on the first conveyor belt. The materials on the first conveyor belt are transferred to the second conveyor belt after the foot pier groove materials are unloaded in step 3. Weigh the required weight of the materials for the plate surface grooves on the second conveyor belt through the second weighing sensor. According to the width of the plate surface grooves of the lower die, transfer the materials on the second conveyor belt to the third conveyor belt; S5: Drive the third conveyor belt to move towards the direction of the lower die. At the same time, driven by the third conveyor belt, spread the pallet wood pier materials on the third conveyor belt in step 3 into the foot pier grooves of the lower die, and spread the plate surface groove materials on the third conveyor belt in step 4 into the plate surface grooves of the lower die above the foot pier grooves.

[0014] Further, the length of the materials filled in each column of foot pier grooves in step 2 is the same as the length of the plate surface grooves paved in step 4. When the first conveyor belt conveys materials to the second conveyor belt, the length of each column of foot pier grooves and plate surface grooves is controlled by the relative distance between the two blanking plates.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention changes the traditional one-time material laying method, adopts a two-time material laying process of first filling the foot pier part and then laying the plate surface groove part of the lower die. With the aid of the first weighing sensor and the second weighing sensor, accurately weigh the total weight of the materials required for the tray to be pressed and the weights of the materials distributed into the foot pier grooves and plate surface grooves of the lower die, and can accurately control the amount of materials filled in the foot pier grooves, ensure the density and strength of the foot pier, and meet the high-strength requirements of the foot pier as a load-bearing component; Through structures such as the baffle plate, blanking plate, screw, and handle, the length of the materials transferred from the first conveyor belt to the second conveyor belt can be adjusted. Through the coordinated action of structures such as the first lead screw, the first sliding frame, the second lead screw, the second sliding frame, and the rotation speed of the second conveyor belt, ensure that the position of the materials on the third conveyor belt corresponds to the positions of the foot pier grooves and plate surface grooves, and the materials paved on the third conveyor belt match the die position in the width direction, avoid the materials from being misaligned and spilled, and ensure the accuracy of material laying. Description of the Drawings

[0016] Figure 1 is the schematic diagram of the overall mechanism of the present invention; Figure 2 is the top view structure schematic diagram of the present invention; Figure 3 is the side view structure schematic diagram of the present invention; Figure 4 is the schematic diagram of the side view structure of the other side of the present invention; Figure 5 is the schematic diagram of the structure of the flattening unit of the present invention; Figure 6 It is a schematic structural diagram of the weighing hopper of the present invention.

[0017] In the figure: 1, weighing hopper; 2, leveling unit; 201, first conveyor belt; 202, second conveyor belt; 203, first carriage frame; 204, first support; 205, baffle plate; 206, blanking plate; 207, screw; 208, handle; 209, slide bar; 210, first lead screw; 211, first drive motor; 3, paving unit; 301, second support; 302, third conveyor belt; 303, second carriage frame; 304, second lead screw; 305, second drive motor; 4, lifting assembly; 401, four linked H-type lead screw elevators; 402, lifting motor; 5, spike roller; 6, servo motor; 7, first weighing sensor; 8, second weighing sensor. Specific embodiments

[0018] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0019] A quantitative feeding device for producing wood chip trays includes a weighing hopper 1, a leveling unit 2 and a paving unit 3. The weighing hopper 1 is located above the leveling unit 2, and the materials in the weighing hopper 1 are evenly spread on the leveling unit 2. The paving unit 3 is located on one side of the leveling unit 2, and the materials on the paving unit 3 are spread in the lower mold of the compression mold according to the size of the mold. The leveling unit 2 includes a first conveyor belt 201, a second conveyor belt 202, a first carriage frame 203 and a first support 204. The driving directions of the first conveyor belt 201 and the second conveyor belt 202 are parallel. The weighing hopper 1 and the first conveyor belt 201 are both located at the top of the first support 204. Both sides of the weighing hopper 1 are fixedly installed on the top of the first conveyor belt 201 by bolts. The bottom of the first conveyor belt 201 is connected to the top of the first support 204 through the first weighing sensor 7. The second conveyor belt 202 is installed on the first support 204 through the first carriage frame 203. The bottom of the first carriage frame 203 is installed on the first support 4 through the second weighing sensor 8. The second conveyor belt 202 is slidably installed on the top of the first carriage frame 203. The second conveyor belt 202 conveys materials to the paving unit 3. A second weighing sensor 8 is provided between the bottom of the first carriage frame 203 and the first support 204.

[0020] Such as Figure 1 and Figure 5As shown, in this embodiment, it further includes a controller, which is a PLC controller. The output ends of the first weighing sensor 7 and the second weighing sensor 8 are electrically connected to the input end of the controller, and the input ends of the first conveyor belt 201 and the second conveyor belt 202 are electrically connected to the output end of the controller. By inputting corresponding parameters into the PLC controller, automatic operation is realized; by controlling the rotation speeds of the respective conveyor belts, the thickness of the material falling on the corresponding conveyor belt can be accurately controlled. The material required for the pallet to be pressed is weighed by the weighing hopper 1 under the action of the first weighing sensor 7. In the process of spreading the material on the lower mold in the present invention, the method of first filling the pallet foot pier groove and then spreading the material on the plate surface groove part of the lower mold in batches is adopted. First, the material in the weighing hopper 1 uniformly falls onto the first conveyor belt 201 through the discharge port of the weighing hopper 1, and then is transmitted to the second conveyor belt 202. The second conveyor belt 202 weighs the weight of the material required to fill the pallet foot pier groove through the second weighing sensor 8 at its bottom and transmits it to the spreading unit 3. During the process of the second conveyor belt 202 conveying the material to the spreading unit, the material on the second conveyor belt 202 is evenly divided into multiple portions according to the distribution of the pallet foot pier grooves and arranged on the spreading unit 3. For example, for a commonly used tray in the market with a "chuan" - shaped structure, three strip - shaped foot piers are used as supports. During the process of the material on the second conveyor belt 202 being conveyed to the spreading unit 3, the weighed material is evenly divided into three equal portions corresponding to the three foot piers according to the positions of the three foot piers; for another commonly used four - way entry fork tray in the market, nine foot piers are used at the bottom. When filling the material into the nine foot pier grooves, during the process of laying the material in the foot pier grooves from the second conveyor belt 202 to the spreading unit 3, the foot pier grooves can be divided into three columns according to the spacing between two adjacent foot pier grooves in the horizontal direction and laid on the spreading unit 3. When the material on the spreading unit 3 is laid into the lower mold, the three columns of foot pier grooves are further evenly divided into three portions according to the spacing between two foot pier grooves in the vertical direction and laid into the foot pier grooves. In this way, the material is filled into the corresponding foot pier grooves; similarly, after the material on the second conveyor belt 202 is transmitted to the spreading unit 3, the material on the first conveyor belt 201 falls onto the second conveyor belt 202. The second conveyor belt 202 weighs the weight of the material required for the tray plate surface, and transmits the material on the second conveyor belt 202 to the spreading unit 3 according to the size of the tray plate surface groove of the lower mold. Finally, the spreading unit 3 spreads the material into the foot pier grooves and the plate surface grooves of the lower mold in sequence. Compared with the existing method of spreading the material at one time, the weight of the material filled in the foot pier grooves is accurately controlled, ensuring the density and strength of the foot piers.

[0021] The spreading unit 3 includes a second support 301, a third conveyor belt 302, and a second carriage frame 303. The third conveyor belt 302 is slidably installed on the top of the second carriage frame 303, and the bottom of the second carriage frame 303 is installed on the second support 301 through a lifting assembly 4.

[0022] As Figure 1As shown, the driving direction of the third conveyor belt 302 is perpendicular to that of the second conveyor belt 202. The first conveyor belt 201 can determine the length of the paving material. During the process of the second conveyor belt 202 transporting the material to the third conveyor belt 302, the width of the paving material can be determined to ensure that the material can be accurately filled into the foot pier grooves and the plate surface grooves of the lower mold. The lifting assembly 4 can drive the third conveyor belt 302 at the top of the second carriage frame 303 to lift. When the third conveyor belt 302 paves into the lower mold, the third conveyor belt 4 can be brought closer to the position of the lower mold through the lifting assembly 4, facilitating the paving of the material.

[0023] There are three threshing rollers 5 provided in the weighing hopper 1, and a servo motor 6 for driving the threshing rollers 5 to rotate is provided on one side of the weighing hopper 1.

[0024] As Figure 2 and 6 shown, the three threshing rollers 5 are arranged in a right triangle above the discharge opening of the weighing hopper 1. The servo motor 6 drives the threshing rollers 5 to rotate. When the threshing rollers 5 rotate, the agglomerated material is dispersed by the thorns on the surface, promoting the discharge of the weighing hopper 1 and improving the uniformity of the material feeding.

[0025] On both sides of the first conveyor belt 201, the second conveyor belt 202, and the third conveyor belt 302, there are baffle plates 205. One end of each of the baffle plates 205 on both sides of the first conveyor belt 201 is installed with a relatively retractable blanking plate 206 through bolts. The two baffle plates 205 on the first conveyor belt 201 are connected by a screw rod 207. One end of the screw rod 207 passes through one side of the weighing hopper 1 and is installed with a handle 208, and the other end is rotatably connected to the other side of the weighing hopper 1. Moreover, there are multiple sliding rods 209 on the top of the first conveyor belt 201, and the baffle plates 205 and the blanking plates 206 are slidably installed on the sliding rods 209.

[0026] As Figure 2 , Figure 5 and Figure 6 shown, the baffle plates 205 can prevent the material on the conveyor belt from falling from both sides of the conveyor belt. Among them, the baffle plates 205 on both sides of the second conveyor belt 202 and the third conveyor belt 302 are respectively fixedly installed on both sides of the corresponding conveyor belt. By rotating the handle 208 to drive the screw rod 207 to rotate, the screw rod 207 rotates to drive the two baffle plates 205 and the blanking plates 206 on both sides of the first conveyor belt 201 to move relatively away from or close to each other. In this way, the length of the material transported by the first conveyor belt 201 to the second conveyor belt 202 can be adjusted to be suitable for lower molds of different shapes and sizes. Since the length of each column of foot pier grooves in the lower mold is not much different from the length of the plate surface grooves and the material will flow during subsequent extrusion, in this embodiment, the length of the material for filling each column of foot pier grooves is the same as the length of the material for paving the plate surface grooves. To adjust the distance between the two blanking plates 206, it only needs to be adjusted to be the same as the length of each column of foot pier grooves in the lower mold.

[0027] The second conveyor belt 202 is slidably mounted on the top of the first carriage frame 203. A first lead screw 210 parallel to the driving direction of the second conveyor belt 202 is provided at the bottom of the first carriage frame 203. The bottom of the second conveyor belt 202 is threadedly mounted on the first lead screw 210 through a first support seat. A first driving motor 211 for driving the first lead screw 210 to rotate is provided on one side of the first carriage frame 203.

[0028] As Figure 4 shown, the first driving motor 211 drives the first lead screw 210 to rotate, thereby driving the second conveyor belt 202 to slide left and right on the first carriage frame 203, realizing the approach or separation of the second conveyor belt 202 relative to the third conveyor belt 302, changing the relative position between the second conveyor belt 202 and the third conveyor belt 302, and facilitating the conveyance of the materials in the foot pier grooves on the second conveyor belt 202 to the third conveyor belt 302 according to the spacing and number of columns of adjacent two columns of foot pier grooves.

[0029] A second lead screw 304 parallel to the driving direction of the third conveyor belt 302 is provided at the bottom of the second sliding frame 303. The bottom of the third conveyor belt 302 is threadedly mounted on the second lead screw 304 through a second support seat. A second driving motor 305 for driving the second lead screw 304 to rotate is provided on one side of the second sliding frame 303.

[0030] As Figure 3 shown, the second driving motor 305 drives the second lead screw 304 to rotate, thereby driving the third conveyor belt 302 to slide back and forth on the second sliding frame 303, realizing the approach or separation of the third conveyor belt 302 in the direction of the lower mold. The third conveyor belt 302 is located above the lower mold. During use, the second driving motor 305 moves the third conveyor belt 302 to one end of the lower mold, and then the third conveyor belt 302 is started to spread the materials on the third conveyor belt 302 into the lower mold.

[0031] The lifting assembly 4 adopts four linked H-type screw jacks 401, and the four linked H-type screw jacks 401 are driven by a lifting motor 402 to realize the lifting of the second sliding frame 303.

[0032] As Figure 3 and 4 shown, the four linked H-type screw jacks 401 have the advantages of strong load capacity and high lifting stability. Its structure is prior art and will not be elaborated here.

[0033] A quantitative feeding method for producing wood chip pallets includes the following operation steps: S1: Determine the total weight of the materials required for the tray to be pressed and the weights of the materials allocated to the foot pier grooves and the board surface grooves of the lower die. Weigh the wood chip materials mixed with glue placed in the weighing hopper 1 by the first weighing sensor 7 to obtain the total weight of the materials required for the tray to be pressed. The foot pier grooves in the lower die are divided into multiple columns according to the layout. According to the length of each column of foot pier grooves, adjust the gap between the two baffle plates 205 and the distance between the two blanking plates 206 by turning the handle 208. S2: Start the servo motor 6, the first conveyor belt 201 and the second conveyor belt 202. Drive the materials in the weighing hopper 1 in step S1 to be evenly spread on the first conveyor belt 201 under the drive of the threshing roller 5. Under the action of the blanking plate 206, the materials on the first conveyor belt 201 are transported to the second conveyor belt 202 according to the length of each column of foot pier grooves. By controlling the rotation speeds of the first conveyor belt 201 and the second conveyor belt 202, control the thickness of the materials falling on the corresponding conveyor belts. Weigh the weight of the materials required for the foot pier grooves on the second conveyor belt 202 by the second weighing sensor 8. When the weighing sensor 8 monitors that the materials on the second conveyor belt 202 reach a certain weight, the controller turns off the first conveyor belt 201 and the servo motor 6. S3: According to the arrangement of the foot pier grooves, transfer the materials on the second conveyor belt 202 in step S2 to the third conveyor belt 302 according to the spacing and number of columns of each column of tray foot piers. Specifically, after the materials on the first conveyor belt 201 are transported to the second conveyor belt 202, start the drive motor 211 to drive the second conveyor belt 202 to move in the direction of the third conveyor belt 302. According to the positions of the multiple columns of foot pier grooves on the lower die, transfer the materials on the second conveyor belt 202 to the third conveyor belt 302. Start the third conveyor belt 302 to drive the materials on the third conveyor belt 302 to move a certain distance in the direction of the lower die. After reaching the specified position, turn off the third conveyor belt 302. S4: The drive motor 211 rotates in the reverse direction to drive the second conveyor belt 202 to move away from the third conveyor belt 302 until the second conveyor belt 202 returns to its original position. Start the first conveyor belt 201 and the servo motor 6 to evenly spread the remaining materials in the weighing hopper 1 in step 2 on the first conveyor belt 201. The materials on the first conveyor belt 201 are spread on the second conveyor belt 202. When the weighing sensor 8 monitors that the materials on the second conveyor belt 202 reach the set weight required for the board surface grooves, the controller turns off the first conveyor belt 201 and the servo motor 6. Start the drive motor 211 to drive the second conveyor belt 202 to move in the direction of the third conveyor belt 302. After moving to the specified position, according to the width of the board surface grooves of the lower die, control the rotation speed of the second conveyor belt 202 to spread the materials on the second conveyor belt 202 onto the third conveyor belt 302. S5: Start the second driving motor 305 to drive the third conveyor belt 302 to move towards the lower die. Then, control the third conveyor belt 302 to lower by the lifting motor 402. After reaching the designated position, turn off the lifting motor 4 and start the third conveyor belt 302 at the same time. Under the rotation and forward movement of the third conveyor belt 302, the pallet wooden pier materials on the third conveyor belt 302 in step 3 are paved into the pier grooves of the lower die according to the positions of the pier columns in each column of the lower die. After the paving of the pier grooves is completed, control the second driving motor 305 to rotate in the reverse direction, and the third conveyor belt 302 moves backward to pave the board surface groove materials on the third conveyor belt 302 in step 4 into the board surface grooves. After the paving is completed, the third conveyor belt 302 returns to the initial position and waits for the next operation. At the same time, start the upper die to perform extrusion molding on the lower die.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A quantitative feeding device for the production of wood chip trays, characterized in that: It includes a weighing hopper (1), a leveling unit (2) and a paving unit (3). The weighing hopper (1) is located above the leveling unit (2), and the paving unit (3) is located on one side of the leveling unit (2). The leveling unit (2) includes a first conveyor belt (201), a second conveyor belt (202), a first carriage frame (203) and a first support (204). The weighing hopper (1) and the first conveyor belt (201) are both located at the top of the first support (204). The first conveyor belt (201) is arranged below the weighing hopper (1). The second conveyor belt (202) is installed on the first support (204) through the first carriage frame (203), and the second conveyor belt (202) conveys materials to the paving unit (3).

2. The quantitative feeding device for producing wood chip trays according to claim 1, characterized in that: A first weighing sensor (7) is provided between the bottom of the first conveyor belt (201) and the first support (204), and a second weighing sensor (8) is provided between the bottom of the first carriage frame (203) and the first support (204).

3. The quantitative feeding device for producing wood chip trays according to claim 1, characterized in that: The paving unit (3) includes a second support (301), a third conveyor belt (302) and a second carriage frame (303). The third conveyor belt (302) is slidably installed on the second carriage frame (303), and the bottom of the second carriage frame (303) is installed on the second support (301) through a lifting assembly (4).

4. A quantitative feeding device for producing wood chip trays according to claim 1, characterized in that: There are three threshing rollers (5) provided inside the weighing hopper (1), and a servo motor (6) for driving the threshing rollers (5) to rotate is provided on one side of the weighing hopper (1).

5. The quantitative feeding device for producing wood chip trays according to claim 1, wherein: Baffle plates (205) are provided on both sides of the first conveyor belt (201), the second conveyor belt (202) and the third conveyor belt (302). One end of the baffle plates (205) on both sides of the first conveyor belt (201) is installed with a retractable blanking plate (206). The two baffle plates (205) of the first conveyor belt (201) are connected by a screw rod (207). One end of the screw rod (207) passes through one side of the weighing hopper (1) and is installed with a handle (208), and the other end is rotatably connected to the other side of the weighing hopper (1). And there are multiple sliding rods (209) provided on the top of the first conveyor belt (201), and the baffle plates (205) and the blanking plates (206) are slidably installed on the sliding rods (209).

6. The quantitative feeding device for producing wood chip trays according to claim 1, characterized in that: The second conveyor belt (202) is slidably installed on the first carriage frame (203). A first lead screw (210) is provided at the bottom of the first carriage frame (203). The bottom of the second conveyor belt (202) is threadedly installed on the first lead screw (210) through a first support seat. A first driving motor (211) for driving the first lead screw (210) to rotate is provided on one side of the first carriage frame (203).

7. A quantitative feeding device for producing wood chip trays according to claim 2, characterized in that: A second lead screw (304) is provided at the bottom of the second carriage frame (303). The bottom of the third conveyor belt (302) is threadedly installed on the second lead screw (304) through a second support seat. A second driving motor (305) for driving the second lead screw (304) to rotate is provided on one side of the second carriage frame (303).

8. The quantitative feeding device for producing wood chip trays according to claim 2, wherein: The lifting assembly (4) uses four linked H-type screw jacks (401), and the lifting motor (402) drives the four linked H-type screw jacks (401) to realize the lifting of the second sliding frame (303).

9. A quantitative feeding method for the production of wood chip pallets according to any one of claims 1-8, characterized in that: It includes the following operation steps: S1: Determine the total weight of the materials required for the tray to be pressed and the weights of the materials allocated to the lower die foot pier grooves and the plate surface grooves. Weigh the wood chip materials mixed with glue placed in the weighing hopper (1) through the first weighing sensor (7) to weigh the total weight of the materials required for the tray to be pressed; S2: The foot pier grooves in the lower die are divided into multiple columns according to the layout. The materials in the weighing hopper 1 in step S1 are evenly spread on the first conveyor belt (201). The materials on the first conveyor belt (201) are transported to the second conveyor belt (202) according to the length of each column of foot pier grooves on the lower die, and the weight required for the tray foot pier on the second conveyor belt (202) is weighed through the second weighing sensor (8); S3: According to the arrangement of the foot pier grooves, the materials on the second conveyor belt (202) in step S2 are transported to the third conveyor belt (302) according to the spacing and number of columns of each column of foot pier grooves, and by controlling the rotation speed and position of the second conveyor belt (202); S4: The remaining materials in the weighing hopper 1 in step 2 are evenly spread on the first conveyor belt (201). The materials on the first conveyor belt (201) are transported to the second conveyor belt (202) after removing the materials in the foot pier grooves in step 3. The weight required for the plate surface grooves on the second conveyor belt (202) is weighed through the second weighing sensor (8). According to the width of the plate surface grooves on the lower die, the materials on the second conveyor belt (202) are transported to the third conveyor belt (302); S5: Drive the third conveyor belt (302) to move towards the lower die. At the same time, driven by the third conveyor belt (302), the tray wooden pier materials on the third conveyor belt (302) in step 3 are spread in the foot pier grooves of the lower die, and the plate surface groove materials on the third conveyor belt (302) in step 4 are spread in the plate surface grooves of the lower die above the foot pier grooves.

10. A method for quantitatively laying materials in the production of wood chip trays according to claim 9, characterized in that: The length of the materials filling each column of foot pier grooves in step 2 is the same as the length of spreading the plate surface grooves in step 4. When the first conveyor belt (201) transports materials to the second conveyor belt (202), the length of each column of foot pier grooves and the plate surface grooves is controlled by the relative distance between the two blanking plates (206).

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