Automatic feeding and hot-pressing system for screen cloth

Abstract

The utility model discloses an automatic feeding and hot-pressing system for screen cloth, which is characterized by comprising a workbench, and a screen cloth feeding unit, a needle clamp type material taking unit, a feeding unit and a hot-pressing unit which are respectively arranged on the workbench, and the feeding unit comprises a linear moving mechanism and a hot-pressing lower die with a positioning mechanism; the linear moving mechanism is used for driving the hot-pressing lower die to linearly move among the initial feeding position, the hot-pressing position and the piece taking position of the workbench, the needle clamp type material taking unit is used for taking away the screen cloth piece by piece from the screen cloth feeding unit and placing the screen cloth at the position, located at the initial feeding position, of the hot-pressing lower die, and the hot-pressing lower die positions the screen cloth through the positioning mechanism. The hot-pressing unit comprises a hot-pressing driving mechanism and a hot-pressing upper die; the screen cloth hot-pressing machine has the advantages that the hot-pressing lower die is driven by the linear moving mechanism to linearly move among the initial feeding position, the hot-pressing position and the piece taking position of the workbench, so that feeding, hot-pressing and discharging procedures of screen cloth are sequentially realized, the production efficiency is effectively improved, and the required occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection molding of safety airbags, in particular to an automatic feeding and hot pressing system for mesh cloth. Background Art

[0002] Plastic parts such as automobile airbags are molded by one-step injection molding with small inserts such as mesh, nuts, and screws embedded inside. This process is widely used in the field of injection molding engineering. The existing mesh insert injection molding processes basically use manual semi-automatic or robot to clamp a piece of mesh from the conveyor line one by one and move it to the hot pressing equipment for hot pressing. The hot pressed mesh is then clamped by the robot to the next processing position for the next processing. Not only is the entire operation process cumbersome and inefficient, affecting the overall automation rhythm, but the hot pressing system requires a large area for equipment layout. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an automatic feeding and hot pressing system for mesh cloth which integrates feeding, hot pressing and unloading, has high processing efficiency and occupies a small area.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: an automatic feeding and hot pressing system for mesh cloth, comprising a workbench and a mesh cloth feeding unit, a needle clamp type material taking unit, a feeding unit and a hot pressing unit respectively arranged on the workbench, the mesh cloth feeding unit is used to position and stack mesh cloth, the feeding unit comprises a linear moving mechanism and a hot pressing lower die with a positioning mechanism, the workbench is provided with an initial feeding position, a hot pressing position and a taking position in sequence from front to back, the linear moving mechanism is used to drive the hot pressing lower die to the initial feeding position, the hot pressing position and the taking position of the workbench The hot pressing unit is used to linearly move between the positions of the pieces, the needle clamp type material taking unit is used to take the mesh cloth piece by piece from the mesh cloth feeding unit and place it on the hot pressing lower mold located at the initial feeding position, the hot pressing lower mold positions the mesh cloth through the positioning mechanism, the hot pressing unit comprises a hot pressing drive mechanism and a hot pressing upper mold, the hot pressing upper mold is moved up and down by the hot pressing drive mechanism and is arranged above the hot pressing position, the linear moving mechanism is used to drive the hot pressing lower mold to move to the hot pressing position, and the linear moving mechanism is also used to drive the hot pressing lower mold to move backward to the taking position.

[0005] Compared with the prior art, the advantage of the utility model lies in that the mesh cloth is positioned and stacked on the mesh cloth feeding unit, and the mesh cloth is taken away piece by piece from the mesh cloth feeding unit by a needle clamp type feeding unit and placed on the hot pressing lower die located at the initial feeding position, which can greatly improve the feeding efficiency of the mesh cloth and save the floor space required for the mesh cloth feeding unit; the entire system drives the hot pressing lower die to move linearly between the initial feeding position, hot pressing position and picking position of the workbench through a linear moving mechanism to sequentially realize the feeding, hot pressing and unloading processes of the mesh cloth. The entire operation process is relatively coherent, the automation operation efficiency is high, the production efficiency is effectively improved, and the entire system is arranged on a workbench, which greatly reduces the required floor space and wiring complexity.

[0006] Preferably, the positioning mechanism comprises a plurality of positioning pins fixedly arranged on the hot pressing lower die at predetermined positions, so as to facilitate accurate positioning of the mesh and subsequent hot pressing operations.

[0007] Preferably, the positioning mechanism further comprises a clamping assembly, the clamping assembly comprises four clamping cylinders, the clamping cylinders are fixedly arranged on the linear moving mechanism and are symmetrically arranged on both sides of the hot pressing lower die in a group of two, the two clamping cylinders in the same group are distributed along the front-back direction, the driving rods of the clamping cylinders are horizontally facing the inner side of the hot pressing lower die and the height is lower than the top of the side of the hot pressing lower die, and the ends of the driving rods of the clamping cylinders are fixedly provided with clamping heads. When the hot pressing lower die moves to the hot pressing position through the linear moving mechanism to cooperate with the hot pressing upper die for hot pressing, the driving rods of the four clamping cylinders drive the clamping heads to extend inward and clamp the mesh cloth on the side of the hot pressing lower die, thereby ensuring the stability of the mesh cloth during hot pressing and preventing the hot pressing upper die from lifting the mesh cloth when rising; when the hot pressing lower die moves to the taking-up position, the driving rods of the four clamping cylinders retract outward and release the mesh cloth, so as to facilitate manual or subsequent robot removal of the mesh cloth.

[0008] Preferably, the linear motion mechanism comprises a synchronous pulley, a pulley driver, a synchronous conveyor belt, a driven wheel, a mobile connection block, a mobile base plate and two groups of linear slide rail slider assemblies, wherein the synchronous conveyor belt is arranged at the bottom of the workbench along the front-to-back direction, the pulley driver is fixedly arranged at the bottom of the workbench, the synchronous pulley is rotationally arranged at one end of the synchronous conveyor belt, the driven wheel is rotationally arranged at the other end of the synchronous conveyor belt, the pulley driver drives the synchronous pulley to rotate and drives the synchronous conveyor belt and the driven wheel to rotate synchronously, the mobile connection block is fixedly arranged at the upper part of the synchronous conveyor belt and moves synchronously with the synchronous conveyor belt, the mobile base plate is fixedly arranged at the top of the mobile connection block, the hot pressing lower mold is fixedly arranged on the mobile base plate, and the two groups of linear slide rail slider assemblies are respectively arranged between the bottom sides of the mobile base plate and the workbench along the front-to-back direction. The linear motion mechanism adopts a combination of synchronous pulleys and synchronous conveyor belts, which can effectively adapt to the action requirements of the device moving along a longer front-to-back direction on the workbench in this system.

[0009] Preferably, the mesh feeding unit comprises a positioning base plate and a plurality of positioning rods, wherein the positioning base plate is fixedly arranged horizontally on the workbench, and the plurality of positioning rods are fixedly arranged vertically at preset positions on the positioning base plate. This facilitates the positioning and stacking of multiple meshes, effectively saving floor space; the number of mesh feeding units can also be set to two, and the two mesh feeding units are symmetrically distributed on both sides of the workbench, which facilitates the simultaneous loading and unloading of materials and improves overall work efficiency.

[0010] Preferably, the mesh feeding unit also includes a thickness detection mechanism, which includes a detection pillar, a detection top plate, a detection cylinder, a displacement detection sensor and a sensor connecting plate. The detection pillar is vertically fixedly arranged on the workbench and is located on one side of the positioning base plate. The detection top plate is horizontally fixedly arranged on the top of the detection pillar and extends in the direction of the positioning base plate. A detection boss is arranged at the bottom of the detection top plate. The detection cylinder is fixedly arranged upward on the detection pillar. The sensor connecting plate is horizontally fixedly arranged on the upper end of the output rod of the detection cylinder and is arranged parallel to the bottom of the detection top plate. The displacement detection sensor is fixedly arranged upward on the sensor connecting plate and is aligned with the detection boss. A thickness detection gap is formed between the detection end of the displacement detection sensor and the detection boss. After the needle-clamp type material picking unit clamps the mesh cloth, it moves the mesh cloth to the thickness detection gap to detect the thickness of the mesh cloth. During the detection, the output rod of the detection cylinder moves upward, and drives the displacement detection sensor to move upward through the sensor connecting plate, and finally presses the mesh cloth between the detection end of the displacement detection sensor and the detection boss to obtain the current detection thickness of the mesh cloth, and compares the detection thickness with the preset single-piece mesh cloth thickness in the detection system connected to the displacement detection sensor to determine whether the currently clamped mesh cloth is a single piece. When the detection thickness is greater than the preset single-piece mesh cloth thickness, subsequent operations are stopped and an error message is issued to the operator. Usually, the error rate of the needle-clamp type material picking unit clamping a single piece of mesh cloth is low, and the purpose of setting up the thickness detection mechanism is to further improve the overall pass rate during large-scale processing.

[0011] Preferably, the mesh feeding unit further comprises a level detection mechanism, the level detection mechanism comprises a level detector and a level detection bracket, the level detection bracket is vertically fixed on the workbench, and the level detector is horizontally fixed on the top of the level detection bracket. The level of the clamped mesh is detected by the level detector to prevent the mesh from tilting when it is not stably clamped, thereby affecting the subsequent hot pressing efficiency and product qualification rate; if there are both a thickness detection mechanism and a level detection mechanism, the detection position of the level detection mechanism is set above the detection position of the thickness detection mechanism, so as to ensure that they are both within the moving stroke of the needle clamping material taking unit.

[0012] Preferably, the needle clamp type pickup unit includes a two-axis moving module, a needle clamp type pickup fixture and a laser distance sensor. The two-axis moving module is fixedly arranged on the workbench and drives the needle clamp type pickup fixture to move in the left-right direction and the up-down direction. The laser distance sensor is fixedly arranged at the bottom of the needle clamp type pickup fixture. The laser distance sensor is used to detect the distance between the needle clamp type pickup fixture and the mesh cloth. The needle clamp type pickup fixture is used to take the mesh cloth piece by piece from the mesh cloth feeding unit and place it at the hot pressing lower die at the initial feeding position when the distance between the needle clamp type pickup fixture and the mesh cloth reaches a preset pickup distance. The needle clamp type pickup fixture is driven to move by the two-axis moving module, so that the mesh cloth is moved from the mesh cloth feeding unit to the hot pressing lower die. The mesh cloth feeding unit and the hot pressing lower die are arranged horizontally on the workbench, which effectively saves space and has a high efficiency in moving and transporting the mesh cloth.

[0013] Preferably, the needle clamp type pick-up fixture comprises a pick-up base plate, at least four pneumatic needle clamps and at least two auxiliary push rods. The pick-up base plate is horizontally fixedly arranged at the bottom of the moving end of the two-axis moving module. The laser distance sensor and at least four pneumatic needle clamps are respectively fixedly arranged downward at the bottom of the pick-up base plate. At least four pneumatic needle clamps are used to cooperate with each other to horizontally clamp the mesh. At least two auxiliary push rods are fixedly arranged downward at the bottom of the pick-up base plate. The bottom ends of at least two auxiliary push rods are respectively connected to one side of the top surface of the mesh after horizontal clamping. The distance between the pneumatic needle clamp and the mesh is obtained by the laser distance sensor. When the distance between the pneumatic needle clamp and the mesh reaches the set clamping distance, it can ensure that the pneumatic needle clamp accurately clamps only one piece of mesh from the mesh positioned and stacked at the mesh feeding unit. The auxiliary push rod is used to continue to press and position the mesh on the hot pressing lower mold when the pneumatic needle clamp is released, so as to effectively separate from the pneumatic needle clamp.

[0014] Preferably, the hot pressing driving mechanism comprises a hot pressing support frame, a hot pressing fixing plate, a hot pressing driving cylinder, four guide columns and a hot pressing driving plate, wherein the hot pressing support frame is vertically fixed on the workbench, the hot pressing fixing plate is horizontally fixed on the upper part of the hot pressing support frame, the hot pressing driving cylinder is vertically fixed downward on the hot pressing fixing plate and extends downward, the hot pressing driving plate is fixedly connected to the driving rod of the hot pressing driving cylinder, the hot pressing upper die is fixedly arranged at the bottom of the hot pressing driving plate, the four corners of the hot pressing driving plate are respectively vertically fixed upward with guide columns, the hot pressing fixing plate is fixedly arranged with four linear bearings corresponding to the positions of the guide columns, and the guide columns pass upward through the inner holes of the linear bearings. The hot pressing upper die is driven downward by the hot pressing driving cylinder to cooperate with the hot pressing lower die to complete the hot pressing of the mesh, and the cooperation between the guide columns and the linear bearings ensures the stability of movement and improves the quality of hot pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a partial structural schematic diagram of the feeding unit in the utility model;

[0017] Figure 3 It is a partial structural schematic diagram of the hot pressing unit in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the linear moving mechanism in the utility model;

[0019] Figure 5 It is a partial structural schematic diagram of the needle clamp type material taking unit in the utility model;

[0020] Figure 6 It is a structural schematic diagram of the mesh cloth feeding unit of the utility model.

[0021] Description of reference numerals:

[0022] 1. Workbench; 11. Initial feeding position; 12. Hot pressing position; 13. Pick-up position; 21. Positioning base plate; 22. Positioning rod; 31. Hot pressing lower die; 311. Positioning pin; 32. Clamping cylinder; 33. Clamping head; 41. Two-axis moving module; 42. Laser ranging sensor; 43. Pick-up base plate; 44. Pneumatic needle clamp; 45. Auxiliary ejector; 51. Hot pressing upper die; 52. Hot pressing support frame; 53. Hot pressing fixing plate; 54. Hot pressing drive cylinder; 55. Guide Column; 56, hot pressing drive plate; 57, linear bearing; 61, synchronous pulley; 62, pulley driver; 63, synchronous conveyor belt; 64, mobile connecting block; 65, mobile base plate; 66, linear slide slider assembly; 67, driven wheel; 71, detection pillar; 72, detection top plate; 73, detection cylinder; 74, displacement detection sensor; 75, sensor connecting plate; 76, detection boss; 77, thickness detection gap; 81, level detector; 82, level detection bracket. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1: Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, an automatic feeding and hot pressing system for mesh cloth comprises a workbench 1 and a mesh cloth feeding unit, a needle clamp type material taking unit, a feeding unit and a hot pressing unit respectively arranged on the workbench 1. The mesh cloth feeding unit is used to position and stack mesh cloth. The mesh cloth feeding unit comprises a positioning base plate 21 and a plurality of positioning rods 22. The positioning base plate 21 is horizontally fixedly arranged on the workbench 1, and the plurality of positioning rods 22 are vertically fixedly arranged at preset positions on the positioning base plate 21. The feeding unit comprises a linear moving mechanism and a hot pressing lower mold 31 with a positioning mechanism. An initial feeding position 11, a hot pressing position 12 and a pickup position 13 are sequentially arranged thereafter; a linear moving mechanism is used to drive the hot pressing lower die 31 to move linearly among the initial feeding position 11, the hot pressing position 12 and the pickup position 13 of the workbench 1; a needle clamp type pickup unit is used to take mesh cloths piece by piece from the mesh cloth feeding unit and place them at the hot pressing lower die 31 located at the initial feeding position 11; the hot pressing lower die 31 positions the mesh cloth by a positioning mechanism, and the positioning mechanism includes a plurality of positioning pins 311 fixedly arranged on the hot pressing lower die 31 at predetermined positions.

[0025] The needle clamp type pick-up unit includes a two-axis moving module 41, a needle clamp type pick-up fixture and a laser distance sensor 42. The two-axis moving module 41 is fixedly arranged on the workbench 1 and drives the needle clamp type pick-up fixture to move in the left and right directions and the up and down directions. The laser distance sensor 42 is fixedly arranged at the bottom of the needle clamp type pick-up fixture. The laser distance sensor 42 is used to detect the distance between the needle clamp type pick-up fixture and the mesh. The needle clamp type pick-up fixture is used to take the mesh piece by piece from the mesh feeding unit when the distance between the needle clamp type pick-up fixture and the mesh reaches a preset pick-up distance and place it at the initial feeding position 1. 1, the needle clamp type picking fixture includes a picking base plate 43, four pneumatic needle clamps 44 and two auxiliary push rods 45. The picking base plate 43 is horizontally fixed at the bottom of the moving end of the two-axis moving module 41, and the laser ranging sensor 42 and the four pneumatic needle clamps 44 are respectively fixed downward at the bottom of the picking base plate 43. The four pneumatic needle clamps 44 are used to cooperate with each other to horizontally clamp the mesh cloth. The two auxiliary push rods 45 are downwardly fixed at the bottom of the picking base plate 43, and the bottom ends of the two auxiliary push rods 45 are respectively connected to one side of the top surface of the mesh cloth after horizontal clamping. The needle clamp type picking fixture is driven to move by the two-axis moving module 41, so as to realize the movement of the mesh from the mesh feeding unit to the hot pressing lower mold 31. The mesh feeding unit and the hot pressing lower mold 31 are arranged horizontally on the workbench 1, which effectively saves space and has high efficiency in moving and transporting the mesh. The distance between the pneumatic needle clamp 44 and the mesh is obtained by the laser ranging sensor 42. When the distance between the pneumatic needle clamp 44 and the mesh reaches the set clamping distance, it can ensure that the pneumatic needle clamp 44 accurately clamps only one piece of mesh at a time from the mesh positioned and stacked at the mesh feeding unit. The auxiliary push rod 45 is used to continue to press and position the mesh on the hot pressing lower mold 31 when the pneumatic needle clamp 44 is released, so as to effectively disengage from the pneumatic needle clamp 44. The number of pneumatic needle clamps 44 and auxiliary push rods 45 can also be increased according to actual needs.

[0026] The hot pressing unit includes a hot pressing driving mechanism and a hot pressing upper mold 51. The hot pressing upper mold 51 is moved up and down by the hot pressing driving mechanism and is arranged above the hot pressing position 12. The linear moving mechanism is used to drive the hot pressing lower mold 31 to move to the hot pressing position 12. The linear moving mechanism is also used to drive the hot pressing lower mold 31 to move backward to the pick-up position 13; the linear moving mechanism includes a synchronous pulley 61, a pulley driver 62, a synchronous conveyor belt 63, a mobile connecting block 64, a mobile base plate 65, two sets of linear slide slider assemblies 66 and a driven wheel 67, and the synchronous conveyor The belt 63 is arranged at the bottom of the workbench 1 along the front-to-back direction, the pulley driver 62 is fixedly arranged at the bottom of the workbench 1, the synchronous pulley 61 is rotatably arranged at the rear end of the synchronous conveyor belt 63, and the driven wheel 67 is rotatably arranged at the front end of the synchronous conveyor belt 63. Here, the front and rear positions of the synchronous pulley 61, the pulley driver 62 and the driven wheel 67 can also be interchanged. The pulley driver 62 drives the synchronous pulley 61 to rotate and drives the synchronous conveyor belt 63 and the driven wheel 67 to rotate synchronously. The mobile connecting block 64 is fixedly arranged at the upper part of the synchronous conveyor belt 63 and The movable base plate 65 is fixedly arranged on the top of the movable connecting block 64 along the synchronous conveyor belt 63, and the hot pressing lower mold 31 is fixedly arranged on the movable base plate 65. Two sets of linear slide block assemblies 66 are respectively arranged between the bottom sides of the movable base plate 65 and the workbench 1 along the front and rear directions; the hot pressing driving mechanism includes a hot pressing support frame 52, a hot pressing fixed plate 53, a hot pressing driving cylinder 54, four guide columns 55 and a hot pressing driving plate 56. The hot pressing support frame 52 is vertically fixedly arranged on the workbench 1, and the hot pressing fixed plate 53 is horizontally fixedly arranged. The hot press driving cylinder 54 is arranged on the upper part of the hot press support frame 52, and is fixedly arranged on the hot press fixing plate 53 vertically downward and extends downward. The hot press driving plate 56 is fixedly connected to the driving rod of the hot press driving cylinder 54. The hot press upper die 51 is fixedly arranged at the bottom of the hot press driving plate 56. The four corners of the hot press driving plate 56 are respectively fixedly arranged with guide posts 55 vertically upward. The hot press fixing plate 53 is fixedly arranged with four linear bearings 57 corresponding to the positions of the guide posts 55, and the guide posts 55 pass through the inner holes of the linear bearings 57 upward. The hot press driving cylinder 54 drives the hot press upper die 51 to move downward, and cooperates with the hot press lower die 31 to complete the hot pressing of the mesh.

[0027] The overall operation process of the above embodiment 1 is as follows:

[0028] Step 1: The two-axis moving module 41 moves the needle clamp type pick-up fixture to the top of the positioning base plate 21;

[0029] Step 2: The two-axis moving module 41 controls the needle clamp type pick-up fixture to move downward, and the laser distance sensor 42 accurately picks up a piece of mesh cloth;

[0030] Step 3: The needle clamp type pick-up fixture places the mesh cloth on the positioning pin 311 on the hot pressing lower mold 31;

[0031] Step 4: The linear moving mechanism drives the hot pressing lower die 31 to move to the hot pressing position 12, and the hot pressing driving mechanism drives the hot pressing upper die 51 to move downward to cooperate with the hot pressing lower die 31 to hot press the mesh;

[0032] Step 5: The mesh is hot-pressed and formed. The hot-pressing driving mechanism drives the hot-pressing upper mold 51 to lift upward, and the linear moving mechanism drives the hot-pressing lower mold 31 to move to the pickup position 13;

[0033] Step 6: After the subsequent robot takes away the mesh cloth, the linear moving mechanism drives the hot pressing lower mold 31 to return to the initial feeding position 11.

[0034] Embodiment 2: Figure 2 As shown, the rest of the parts are the same as those in Example 1, except that the positioning mechanism also includes a clamping assembly, which includes four clamping cylinders 32, which are fixedly arranged on the linear moving mechanism and are symmetrically distributed on both sides of the hot pressing lower mold 31 in a group of two. The two clamping cylinders 32 in the same group are distributed along the front-to-back direction, and the driving rod of the clamping cylinder 32 is horizontally toward the inner side of the hot pressing lower mold 31 and is lower in height than the top of the side of the hot pressing lower mold 31, and a clamping head 33 is fixedly arranged at the end of the driving rod of the clamping cylinder 32. When the hot-pressing lower die 31 is moved to the hot-pressing position 12 through the linear moving mechanism to cooperate with the hot-pressing upper die 51 for hot-pressing, the driving rods of the four clamping cylinders 32 drive the clamping heads 33 to extend inward and clamp the mesh cloth on the side of the hot-pressing lower die 31, thereby ensuring the stability of the mesh cloth during hot-pressing and preventing the hot-pressing upper die 51 from lifting the mesh cloth when it rises; when the hot-pressing lower die 31 is moved to the pick-up position 13, the driving rods of the four clamping cylinders 32 retract outward and release the mesh cloth.

[0035] Embodiment 3: Figure 1 , Figure 6As shown, the rest of the parts are the same as those in the first embodiment, except that the mesh feeding unit also includes a thickness detection mechanism and a levelness detection mechanism. The thickness detection mechanism includes a detection pillar 71, a detection top plate 72, a detection cylinder 73, a displacement detection sensor 74 and a sensor connecting plate 75. The detection pillar 71 is vertically fixedly arranged on the workbench 1 and is located on one side of the positioning bottom plate 21. The detection top plate 72 is horizontally fixedly arranged on the top of the detection pillar 71 and extends in the direction of the positioning bottom plate 21. A detection boss 76 is arranged at the bottom of the detection top plate 72. The detection cylinder 73 is fixedly arranged upward on the detection pillar 71. The sensor connecting plate 75 is horizontally fixedly arranged at the upper end of the output rod of the detection cylinder 73 and is arranged parallel to the bottom of the detection top plate 72. The displacement detection sensor 74 is fixedly arranged upward on the sensor connecting plate 75 and is aligned with the detection boss 76. A thickness detection gap 77 is formed between the detection end of the displacement detection sensor 74 and the detection boss 76. When the needle clamping material taking unit clamps the mesh, Move to the thickness detection gap 77 to detect the thickness of the mesh. During the detection, the output rod of the detection cylinder 73 moves upward, and drives the displacement detection sensor 74 to move upward through the sensor connecting plate 75, and finally presses the mesh between the detection end of the displacement detection sensor 74 and the detection boss 76 to obtain the current detection thickness of the mesh, and compares the detection thickness with the preset single-piece mesh thickness in the detection system connected to the displacement detection sensor 74 to determine whether the currently clamped mesh is a single piece. When the detection thickness is greater than the preset single-piece mesh thickness, subsequent operations are stopped and an error message is issued to the operator; the level detection mechanism includes a level detector 81 and a level detection bracket 82, the level detection bracket 82 is vertically fixed on the workbench 1, and the level detector 81 is horizontally fixed on the top of the level detection bracket 82; the level of the clamped mesh is detected by the level detector 81 to prevent the mesh from tilting when it is not stably clamped, thereby affecting the subsequent hot pressing efficiency and product qualification rate.

Claims

1. An automatic feeding and hot pressing system for mesh cloth, characterized in that The invention comprises a workbench and a mesh cloth feeding unit, a needle clamp type material taking unit, a feeding unit and a hot pressing unit respectively arranged on the workbench. The mesh cloth feeding unit is used for positioning and stacking mesh cloth. The feeding unit comprises a linear moving mechanism and a hot pressing lower die with a positioning mechanism. An initial feeding position, a hot pressing position and a taking position are arranged on the workbench from front to back in sequence. The linear moving mechanism is used for driving the hot pressing lower die to move linearly between the initial feeding position, the hot pressing position and the taking position of the workbench. The needle clamp type material taking unit is used for taking mesh cloth piece by piece from the mesh cloth feeding unit and placing it at the hot pressing lower die located at the initial feeding position. The hot pressing lower die positions the mesh cloth through the positioning mechanism. The hot pressing unit comprises a hot pressing driving mechanism and a hot pressing upper die. The hot pressing upper die is arranged above the hot pressing position by moving up and down through the hot pressing driving mechanism. The linear moving mechanism is used for driving the hot pressing lower die to move to the hot pressing position. The linear moving mechanism is also used for driving the hot pressing lower die to move backward to the taking position.

2. The automatic feeding and hot pressing system for mesh cloth according to claim 1, characterized in that The positioning mechanism comprises a plurality of positioning pins fixedly arranged on the hot pressing lower die at predetermined positions.

3. The automatic feeding and hot pressing system for mesh cloth according to claim 2, characterized in that The positioning mechanism also includes a clamping assembly, which includes four clamping cylinders. The clamping cylinders are fixedly arranged on the linear moving mechanism and are symmetrically distributed on both sides of the hot pressing lower mold in a group of two. The two clamping cylinders in the same group are distributed along the front and rear directions. The driving rods of the clamping cylinders are horizontally facing the inner side of the hot pressing lower mold and the height is lower than the top of the side of the hot pressing lower mold. A clamping head is fixedly arranged on the end of the driving rod of the clamping cylinder.

4. The automatic feeding and hot pressing system for mesh cloth according to claim 1, characterized in that The linear motion mechanism includes a synchronous pulley, a pulley driver, a synchronous conveyor belt, a movable connecting block, a movable base plate, two groups of linear slide slider assemblies and a driven wheel. The synchronous conveyor belt is arranged at the bottom of the workbench along the front-to-back direction, the pulley driver is fixedly arranged at the bottom of the workbench, the synchronous pulley is rotatably arranged at one end of the synchronous conveyor belt, and the driven wheel is rotatably arranged at the other end of the synchronous conveyor belt. The pulley driver drives the synchronous pulley to rotate and drives the synchronous conveyor belt and the driven wheel to rotate synchronously, the movable connecting block is fixedly arranged on the upper part of the synchronous conveyor belt and moves synchronously with the synchronous conveyor belt, the movable base plate is fixedly arranged on the top of the movable connecting block, the hot pressing lower mold is fixedly arranged on the movable base plate, and the two groups of linear slide slider assemblies are respectively arranged between the two sides of the bottom of the movable base plate and the workbench along the front-to-back direction.

5. The automatic feeding and hot pressing system for mesh cloth according to claim 1, characterized in that The mesh cloth feeding unit comprises a positioning base plate and a plurality of positioning rods. The positioning base plate is horizontally fixedly arranged on the workbench, and the plurality of positioning rods are vertically fixedly arranged at preset positions on the positioning base plate.

6. The automatic feeding and hot pressing system for mesh cloth according to claim 5, characterized in that The mesh feeding unit also includes a thickness detection mechanism, which includes a detection pillar, a detection top plate, a detection cylinder, a displacement detection sensor and a sensor connecting plate. The detection pillar is vertically fixed on the workbench and is located on one side of the positioning base plate. The detection top plate is horizontally fixed on the top of the detection pillar and extends in the direction of the positioning base plate. A detection boss is provided at the bottom of the detection top plate. The detection cylinder is fixedly upwardly arranged on the detection pillar. The sensor connecting plate is horizontally fixedly arranged on the upper end of the output rod of the detection cylinder and is parallelly arranged on the bottom of the detection top plate. The displacement detection sensor is fixedly arranged upwardly on the sensor connecting plate and is aligned with the detection boss. A thickness detection gap is formed between the detection end of the displacement detection sensor and the detection boss.

7. The automatic feeding and hot pressing system for mesh cloth according to claim 5, characterized in that The mesh feeding unit also includes a level detection mechanism, which includes a level detector and a level detection bracket. The level detection bracket is vertically fixed on the workbench, and the level detector is horizontally fixed on the top of the level detection bracket.

8. The automatic feeding and hot pressing system for mesh cloth according to claim 1, characterized in that The needle clamp type picking unit includes a two-axis moving module, a needle clamp type picking fixture and a laser ranging sensor. The two-axis moving module is fixedly arranged on the workbench and drives the needle clamp type picking fixture to move in the left and right directions and the up and down directions. The laser ranging sensor is fixedly arranged at the bottom of the needle clamp type picking fixture. The laser ranging sensor is used to detect the distance between the needle clamp type picking fixture and the mesh cloth. The needle clamp type picking fixture is used to take away the mesh cloth piece by piece from the mesh cloth feeding unit when the distance between the needle clamp type picking fixture and the mesh cloth reaches a preset picking distance and place it on the hot pressing lower mold located at the initial feeding position.

9. The automatic feeding and hot pressing system for mesh cloth according to claim 8, characterized in that The needle clamp type picking fixture includes a picking base plate, at least four pneumatic needle clamps and at least two auxiliary push rods. The picking base plate is horizontally fixed at the bottom of the moving end of the two-axis moving module. The laser ranging sensor and at least four pneumatic needle clamps are respectively fixed downward at the bottom of the picking base plate. At least four pneumatic needle clamps are used to cooperate with each other to horizontally clamp the mesh cloth. At least two auxiliary push rods are fixed downward at the bottom of the picking base plate. The bottom ends of at least two auxiliary push rods are respectively connected to one side of the top surface of the mesh cloth after horizontal clamping.

10. The automatic feeding and hot pressing system for mesh cloth according to claim 1, characterized in that The hot pressing driving mechanism includes a hot pressing support frame, a hot pressing fixing plate, a hot pressing driving cylinder, four guide columns and a hot pressing driving plate. The hot pressing support frame is vertically fixed on the workbench, the hot pressing fixing plate is horizontally fixed on the upper part of the hot pressing support frame, the hot pressing driving cylinder is vertically fixed downward on the hot pressing fixing plate and extends downward, the hot pressing driving plate is fixedly connected to the driving rod of the hot pressing driving cylinder, the hot pressing upper mold is fixedly set on the bottom of the hot pressing driving plate, and the four corners of the hot pressing driving plate are respectively fixedly provided with guide columns vertically upward, and the hot pressing fixing plate is fixedly provided with four linear bearings corresponding to the positions of the guide columns, and the guide columns pass upward through the inner holes of the linear bearings.

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