Back-injection refrigerator foaming device and foaming method

Abstract

The present invention relates to the technical field of polyurethane foaming of refrigerator bodies, specifically a back-foaming refrigerator foaming device and a foaming method, comprising a multi-gun foaming robot, a foaming fixture, a clamping robot, and a roller line, wherein a plurality of foaming fixtures are arranged in sequence, a multi-gun foaming robot is mounted above the foaming fixture, a roller line is arranged at the rear end of the foaming fixture, and a clamping robot is mounted above the roller line. Compared with the prior art, the present invention installs the six surfaces of the foaming fixture on different mechanisms, and adopts a tray and a rear plate mechanism, and a tray push-pull device to realize the demoulding of the back-foaming box body through horizontal movement, so that the foamed box body is inverted on the mold, which is convenient for the clamping robot to directly take it out; the upper multi-gun foaming robot, the lower foaming fixture, and the structure of the box body entering and exiting the roller line are adopted to reduce the height of the mold lifting, and the heavy weight mold can be lifted by the airbag lifting device, simplifying the equipment structure and reducing the manufacturing difficulty and cost.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane foaming of refrigerator bodies, in particular to a back-foaming type refrigerator foaming device and a foaming method. Background Art

[0002] At present, customers have an increasing demand for refrigerator box volume, and they also require more energy-saving and environmentally friendly, which means that the polyurethane foam layer must be more dense, uniform, energy-saving and environmentally friendly. The traditional refrigerator box polyurethane foaming process uses a single-gun foaming process in the bottom tank, which is difficult to meet current requirements. In order to solve this problem, multi-gun foaming began to appear, and the more common foaming method is back double-gun or four-gun foaming.

[0003] Refrigerator production requires large-scale automated production. The refrigerator foaming process requires the inner and outer surfaces of the box to fit with the mold surface to prevent the foaming pressure from causing the box to deform. Back foaming requires the box to be turned upside down on the inner mold. How to remove the box from the inner mold after the outer mold is opened is a key point.

[0004] The traditional way to remove the box is to open the rear side panel, lower the inner mold, and send the box to the foaming fixture through the conveyor belts on both sides, and then use the roller conveyor line to transport it to the downstream assembly station. This makes the back foaming fixture divided into three layers. The lower layer is used for the inner mold to be disengaged or replaced for maintenance, the middle layer is the box entry and exit layer, and the upper layer is the gun head foaming layer.

[0005] Such a back multi-gun foam injection fixture has a relatively high overall height because the box entry and exit layer is at a high position on the second floor. For the heavier refrigerator inner mold, a heavy-load lifting mechanism is required to realize the mold lifting, which leads to the defects of complex overall structure of the foaming equipment, increased manufacturing difficulty and high cost.

[0006] Therefore, it is necessary to design a back-injection refrigerator foaming device and a foaming method to simplify the equipment structure and reduce the manufacturing difficulty and cost while realizing the box taking and placing. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a back-injection refrigerator foaming device and a foaming method, which can simplify the device structure and reduce the manufacturing difficulty and cost while realizing the taking and placing of the cabinet.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a back-injection refrigerator foaming equipment, including a multi-gun foaming robot, a foaming clamp, a clamping robot, and a roller line. Several foaming clamps are arranged in sequence, and a multi-gun foaming robot is installed above the foaming clamp. A roller line is provided at the rear end of the foaming clamp, and a clamping robot is installed above the roller line.

[0009] The foaming fixture comprises a frame, a tray and a rear plate mechanism, a lifting frame, an airbag lifting device, a mold clamping mechanism, a side plate and a motor adjustment mechanism, a tray push-pull device, a top plate, a front plate, and a back foam injection mold. The bottom plate of the back foam injection mold is installed on the tray and the rear plate mechanism, the tray and the rear plate mechanism are connected to the tray push-pull device, the frame is arranged at the front end of the tray push-pull device, a lifting frame is installed at the bottom of the frame, an airbag lifting device and a mold clamping mechanism are arranged between the lifting frame and the frame, a side plate and a motor adjustment mechanism are respectively installed on the left and right sides of the frame, a top plate is installed on the top of the frame, a front plate is installed on the front top of the frame, and the bottom plate of the back foam injection mold, the front plate, the rear plate of the tray and the rear plate mechanism, the side plate and the side plate of the motor adjustment mechanism, the top plate and the back foam injection mold form a refrigerator body foaming cavity.

[0010] The tray and rear plate mechanism include a bracket, rollers, a mold lock, a mold positioning pin, a screw rod, a spring lifting mechanism, a rear plate, a rear plate bracket, and a rear plate connecting rod. Rollers are installed on both sides of the bracket. The top of the bracket is provided with a mold lock and a mold positioning pin. The mold lock is connected to the back injection mold. The rear side of the bracket is provided with a rear plate bracket. The front side of the rear plate bracket is provided with a rear plate. The rear plate and the rear plate bracket are connected by a rear plate connecting rod, and the bottom of the rear plate is connected to the bracket by a screw rod.

[0011] The side panel and motor adjustment mechanism includes a side panel, a side panel adjustment frame, a side panel connecting rod, a synchronous belt driving mechanism, and a second screw rod. The side panel and the side panel adjustment frame are connected by a side panel connecting rod. The side panel adjustment frame is equipped with a second screw rod. The second screw rod and the synchronous belt driving mechanism are connected by a synchronous belt. The end of the second screw rod passes through the side panel adjustment frame and is connected to the side panel.

[0012] The pallet push-pull device includes a motor, a push-pull hook, a pallet guide rail, and a base. The pallet guide rail is installed on the base. The shaft of the motor is connected to a synchronous pulley. The outer sleeve of the synchronous pulley is provided with a synchronous belt. The push-pull hook is fixed on the synchronous belt. The pallet and the rear plate mechanism are placed on the pallet guide rail, and the end of the push-pull hook is connected to the pallet and the rear plate mechanism.

[0013] The top plate includes a top plate body, a top plate lock, a top plate positioning pin, and a compressor cabin mold. The top of the top plate body is provided with a top plate lock and a top plate positioning pin. The top plate lock is connected to the locking mechanism of the frame, and the bottom of the top plate body is provided with a compressor cabin mold.

[0014] The front end of the foaming clamp is fixed to the mold changing trolley, a mold changing wheel support is installed on the frame, a mold changing wheel is installed on the mold changing wheel support, and the frame and the front plate are connected by a turning mechanism.

[0015] The side surface of the lifting motion frame is slidably connected to the guide column.

[0016] The multi-gun bubble injection robot comprises a supporting platform, a track, a gun head, a connecting side plate, an X-axis driving mechanism, a Y-axis driving mechanism, a Z-axis driving mechanism, a wet machine valve group and a pipeline system. A track is provided on the inner side of the supporting platform, and the connecting side plate is slidably connected to the track. The two ends of the X-axis driving mechanism pass through the connecting side plate and are connected to the track. The two connecting side plates are connected through the Y-axis. A base plate with a Y-axis driving mechanism is installed on the Y-axis. The Z-axis driving mechanism is installed on the Y-axis, and the Z-axis driving mechanism is connected to the base plate. The gun head is installed on the Z-axis, and the input end of the gun head is connected to the wet machine valve group and the pipeline system.

[0017] The roller line comprises an inlet roller line and an outlet roller line. The rear end of each foaming clamp is provided with an inlet roller line, and the outlet roller line is located in the middle of the inlet roller line.

[0018] A foaming method for a back-foaming refrigerator foaming device comprises the following steps: step 1, a clamping manipulator transports an empty box body from a drum line to a back-foaming inner mold of a foaming fixture, and inverts the empty box body on the back-foaming inner mold; step 2, a tray push-pull device pushes a tray with an empty box body and a rear plate mechanism into the front end of the foaming fixture; step 3, an airbag lifting device drives a lifting motion frame to lift the tray with an empty box body and the rear plate mechanism upward; step 4, during the lifting process, a side plate and a front plate are parallel to the empty box body; step 5, a top plate contacts a rear plate, a spring lifting mechanism is compressed, and a rear plate connecting rod is pressed against the top plate. Under the action, the rear plate is parallel to the empty box; step 6, the mold clamping mechanism completes the mold locking, the multi-gun foam injection robot moves to the set position, and the gun head is inserted into the back of the empty box for foaming; step 7, after the foaming is completed, the gun head withdraws, and the curing and foaming are carried out according to the set time; step 8, after the curing is completed, the mold clamping mechanism is unlocked, the airbag lifting device is deflated, the lifting motion frame lowers the pallet with the foaming box and the rear plate mechanism together, and the pallet push-pull device translates the pallet with the foaming box and the rear plate mechanism together to the rear end of the foaming fixture; step 9, the clamping robot transports the foaming box from the back foaming inner mold to the roller line.

[0019] Compared with the prior art, the present invention installs the six faces of the foaming fixture on different mechanisms, and uses a tray and a back plate mechanism and a tray push-pull device to realize the demoulding of the back foaming box through horizontal movement, so that the foamed box is inverted on the mold, which is convenient for the clamping manipulator to directly take it out. The present invention adopts an upper multi-gun foaming manipulator, a lower foaming fixture, and a box in-and-out roller line structure, which reduces the height of the mold lifting, and can realize the lifting of a heavy mold through an airbag lifting device, simplifying the equipment structure and reducing the manufacturing difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axonometric drawing of the present invention.

[0021] Figure 2 It is a top view of the present invention.

[0022] Figure 3 It is an axonometric view of the multi-gun bubble injection robot of the present invention.

[0023] Figure 4 This is a partial enlarged view of the multi-gun bubble injection robot of the present invention.

[0024] Figure 5 It is an axonometric view of the foaming fixture of the present invention.

[0025] Figure 6 It is a partial enlarged view of the foaming fixture of the present invention.

[0026] Figure 7 Axonometric view of the tray and rear plate mechanism of the present invention Figure 1 .

[0027] Figure 8 Axonometric view of the tray and rear plate mechanism of the present invention Figure 2 .

[0028] Fig. 9 It is an axonometric view of the side plate and the motor adjustment mechanism of the present invention.

[0029] Fig.10 This is an axonometric view of the pallet push-pull device of the present invention.

[0030] Fig.11 It is an axonometric view of the top plate of the present invention.

[0031] Fig.12 It is a schematic diagram of mold changing according to the present invention. DETAILED DESCRIPTION

[0032] The present invention will now be further described with reference to the accompanying drawings.

[0033] See also Figure 1 , Figure 2 The present invention provides a back-injection refrigerator foaming device, comprising a multi-gun foaming robot, a foaming clamp, a clamping robot, and a roller line. A plurality of foaming clamps 1 are arranged in sequence, a multi-gun foaming robot 2 is set above the foaming clamps 1, a roller line is set at the rear end of the foaming clamps 1, and a clamping robot 3 is set above the roller line.

[0034] See also Figure 5 , Figure 6The foaming fixture 1 includes a frame 102, a tray and a rear plate mechanism 110, a lifting frame 120, an airbag lifting device 131, a mold clamping mechanism 132, a side plate and a motor adjustment mechanism 140, a tray push-pull device 150, a top plate 160, a front plate 170, and a back injection foam inner mold 180. The bottom plate of the back injection foam inner mold 180 is installed on the tray and the rear plate mechanism 110. The tray and the rear plate mechanism 110 are slidably connected with the tray push-pull device 150. The frame 102 is set at the front end of the tray push-pull device 150. The lifting frame 120 is installed at the bottom of the frame 102. An airbag lifting device 131 and a clamping mechanism 132 are provided between the lifting motion frame 120 and the frame 102. A side panel and a motor adjustment mechanism 140 are respectively installed on the left and right sides of the frame 102. A top plate 160 is installed on the top of the frame 102. A front plate 170 is installed on the front top of the frame 102. The bottom plate of the back injection mold 180, the front plate 170, the rear plate 117 of the tray and the rear plate mechanism 110, the side plate 141 of the motor adjustment mechanism 140, the top plate 160 and the back injection mold 180 form a refrigerator body foaming cavity.

[0035] See also Figure 7 , Figure 8 The tray and rear plate mechanism 110 includes a bracket 111, a roller 112, a mold lock 113, a mold positioning pin 114, a screw 115, a spring lifting mechanism 116, a rear plate 117, a rear plate bracket 118, and a rear plate connecting rod 119. Rollers 112 are installed on both sides of the bracket 111. A mold lock 113 and a mold positioning pin 114 are provided on the top of the bracket 111. The mold lock 113 is connected to the back bubble injection inner mold 180. A rear plate bracket 118 is provided on the rear side of the bracket 111. A rear plate 117 is provided on the front side of the rear plate bracket 118. The rear plate 117 and the rear plate bracket 118 are connected by a rear plate connecting rod 119, and the bottom of the rear plate 117 is connected to the bracket 111 by a screw 115.

[0036] See also Fig. 9 The side panel and motor adjustment mechanism 140 includes a side panel 141, a side panel adjustment frame 142, a side panel connecting rod 143, a synchronous belt driving mechanism 144, and a second screw rod 145. The side panel 141 and the side panel adjustment frame 142 are connected by the side panel connecting rod 143. The side panel adjustment frame 142 is provided with a second screw rod 145. The second screw rod 145 and the synchronous belt driving mechanism 144 are connected by a synchronous belt. The end of the second screw rod 145 passes through the side panel adjustment frame 142 and is connected to the side panel 141.

[0037] See also Fig.10The pallet push-pull device 150 includes a motor 151, a push-pull hook 152, a pallet guide rail 153, and a base 156. The pallet guide rail 153 is installed on the base 156. The shaft of the motor 151 is connected to the synchronous pulley. The outer sleeve of the synchronous pulley is provided with a synchronous belt. The push-pull hook 152 is fixed on the synchronous belt. The pallet and rear plate mechanism 110 is placed on the pallet guide rail 153, and the end of the push-pull hook 152 is connected to the pallet and rear plate mechanism 110.

[0038] See also Fig.11 The top plate 160 includes a top plate body 161, a top plate lock 162, a top plate positioning pin 163, and a compressor compartment mold 164. The top of the top plate body 161 is provided with a top plate lock 162 and a top plate positioning pin 163. The top plate lock 162 is connected to the locking mechanism 101 of the frame 102, and the bottom of the top plate body 161 is provided with a compressor compartment mold 164.

[0039] See also Fig.12 The front end of the foaming fixture 1 is fixed to the mold changing trolley 4, a mold changing wheel support 181 is installed on the frame 102, a mold changing wheel 182 is installed on the mold changing wheel support 181, and the frame 102 and the front plate 170 are connected by a flip mechanism.

[0040] When changing the mold, the mold changing trolley 4 is dragged to the front end of the foaming fixture 1 and fixed to the foaming fixture 1. The top plate 160 is unlocked and falls onto the back foaming inner mold 180 with the foaming box, the lifting and moving frame 120 descends, the tray and the rear plate mechanism 110 and the back foaming inner mold 180 descend together, and at the same time, the mold locking mechanism is unlocked, and the back foaming inner mold 180 is separated from the tray and the rear plate mechanism 110 and falls on the mold changing wheel 182. The front plate 170 is flipped up and opened, and the back foaming inner mold 180 is pushed onto the mold changing trolley 4, and the mold changing trolley 4 is dragged away. At the same time, another mold changing trolley 4 with a mold is connected to the foaming fixture 1, and a new foaming fixture and the top plate are pushed in, and all components are reset to complete the mold change.

[0041] See also Figure 3 , Figure 4 The multi-gun bubble injection robot 2 includes a support platform 207, a track 205, a gun head 201, a connecting side plate 203, an X-axis drive mechanism 210, a Y-axis drive mechanism 211, a Z-axis drive mechanism 212, a wet machine valve group and a pipeline system 221. A track 205 is provided on the inner side of the support platform 207, and the connecting side plate 203 is slidably connected to the track 205. After passing through the connecting side plate 203, both ends of the X-axis drive mechanism 210 are connected to the track 205. The two connecting side plates 203 are connected through the Y-axis. A base plate with a Y-axis drive mechanism 211 is installed on the Y-axis. The Z-axis drive mechanism 212 is installed on the Y-axis, and the Z-axis drive mechanism 212 is connected to the base plate. The gun head 201 is installed on the Z-axis, and the input end of the gun head 201 is connected to the wet machine valve group and the pipeline system.

[0042] In order to ensure the stability of the lifting and moving frame 120 during the lifting or lowering process, the side surface of the lifting and moving frame 120 is slidably connected to the guide column 130 .

[0043] For ease of use, the inlet and outlet roller lines can be separated. Specifically, the roller line includes an inlet roller line 5 and an outlet roller line 6. An inlet roller line 5 is provided at the rear end of each foaming fixture 1, and the outlet roller line 6 is located in the middle of the inlet roller line 5.

[0044] The steps of the present invention are as follows: Step 1, the clamping manipulator transports the empty box body from the drum line to the back foaming inner mold of the foaming fixture, and turns the empty box body upside down on the back foaming inner mold; Step 2, the pallet pushing and pulling device pushes the pallet with the empty box body and the rear plate mechanism into the front end of the foaming fixture; Step 3, the airbag lifting device drives the lifting motion frame to lift the pallet with the empty box body and the rear plate mechanism upward; Step 4, during the lifting process, the side plate and the front plate are parallel to the empty box body; Step 5, the top plate contacts the back plate, the spring lifting mechanism is compressed, and the back plate is parallel to the back plate under the action of the back plate connecting rod Empty box; Step 6, the mold clamping mechanism completes the mold clamping and locking, the multi-gun foam injection robot moves to the set position, and the gun head is inserted into the back of the empty box for foaming; Step 7, after the foaming is completed, the gun head withdraws, and the curing and foaming are performed according to the set time; Step 8, after the curing is completed, the mold clamping mechanism is unlocked, the airbag lifting device is deflated, the lifting motion frame lowers the pallet with the foaming box and the rear plate mechanism together, and the pallet push-pull device translates the pallet with the foaming box and the rear plate mechanism together to the rear end of the foaming fixture; Step 9, the clamping robot moves the foaming box from the back foaming inner mold to the roller line.

[0045] The present invention installs the six surfaces of the foaming fixture on different mechanisms, and uses a tray and a back plate mechanism and a tray push-pull device to realize the demoulding of the back foaming box through horizontal movement, so that the foamed box is inverted on the mold, which is convenient for the clamping manipulator to directly take it out. The present invention adopts an upper multi-gun foaming manipulator, a lower foaming fixture, and a box in-and-out roller line structure, which reduces the height of the mold lifting, and can realize the lifting of a heavy mold through an airbag lifting device, simplifying the equipment structure and reducing the manufacturing difficulty and cost.

Claims

1. A back-injection refrigerator foaming device, comprising a multi-gun foaming manipulator, a foaming clamp, a clamping manipulator, and a roller line, characterized in that: A plurality of foaming fixtures (1) are arranged in sequence. A multi-gun foam injection manipulator (2) is mounted above the foaming fixture (1). A roller line is arranged at the rear end of the foaming fixture (1). A clamping manipulator (3) is mounted above the roller line. The foaming fixture (1) comprises a frame (102), a tray and rear plate mechanism (110), a lifting frame (120), an airbag lifting device (131), a mold clamping mechanism (132), a side plate and a motor adjustment mechanism (140), a tray push-pull device (150), a top plate (160), a front plate (170), and a back foam injection inner mold (180). The bottom plate of the back foam injection inner mold (180) is mounted on the tray and rear plate mechanism (110). The tray and rear plate mechanism (110) is connected to the tray push-pull device (150). The frame (102) is mounted at the front end of the tray push-pull device (150). The bottom of the frame (102) is mounted with the lifting frame (120). An airbag lifting device (131) and a mold clamping mechanism (132) are provided between the lifting motion frame (120) and the frame (102); a side plate and a motor adjustment mechanism (140) are respectively installed on the left and right sides of the frame (102); a top plate (160) is installed on the top of the frame (102); a front plate (170) is installed on the front top of the frame (102); a bottom plate of the back foaming inner mold (180), the front plate (170), a tray and a rear plate (117) of the rear plate mechanism (110), a side plate and a side plate (141) of the motor adjustment mechanism (140), the top plate (160) and the back foaming inner mold (180) form a refrigerator body foaming cavity; The tray and rear plate mechanism (110) comprises a bracket (111), a roller (112), a mold lock (113), a mold positioning pin (114), a screw rod (115), a spring lifting mechanism (116), a rear plate (117), a rear plate bracket (118), and a rear plate connecting rod (119). Rollers (112) are installed on both sides of the bracket (111). A mold lock (113) and a mold positioning pin (114) are provided on the top of the bracket (111). The mold lock (113) is connected to the back injection mold (180). A rear plate bracket (118) is provided on the rear side of the bracket (111). A rear plate (117) is provided on the front side of the rear plate bracket (118). The rear plate (117) and the rear plate bracket (118) are connected by a rear plate connecting rod (119). The bottom of the rear plate (117) and the bracket (111) are connected by a screw rod (115). The side plate and motor adjustment mechanism (140) comprises a side plate (141), a side plate adjustment frame (142), a side plate connecting rod (143), a synchronous belt driving mechanism (144), and a second screw rod (145); the side plate (141) and the side plate adjustment frame (142) are connected by a side plate connecting rod (143); the side plate adjustment frame (142) is provided with a second screw rod (145); the second screw rod (145) and the synchronous belt driving mechanism (144) are connected by a synchronous belt; the end of the second screw rod (145) passes through the side plate adjustment frame (142) and is connected to the side plate (141); The pallet push-pull device (150) comprises a motor (151), a push-pull hook (152), a pallet guide rail (153), and a base (156). The pallet guide rail (153) is mounted on the base (156). The shaft of the motor (151) is connected to a synchronous pulley. The outer sleeve of the synchronous pulley is provided with a synchronous belt. The push-pull hook (152) is fixed on the synchronous belt. The pallet and rear plate mechanism (110) is placed on the pallet guide rail (153). The end of the push-pull hook (152) is connected to the pallet and rear plate mechanism (110).

2. A back-injection refrigerator foaming device according to claim 1, characterized in that: The top plate (160) comprises a top plate body (161), a top plate lock (162), a top plate positioning pin (163), and a compressor compartment mold (164); a top plate lock (162) and a top plate positioning pin (163) are provided at the top of the top plate body (161); the top plate lock (162) is connected to a locking mechanism (101) of a frame (102); and a compressor compartment mold (164) is provided at the bottom of the top plate body (161).

3. The back-injection refrigerator foaming device according to claim 1, characterized in that: The front end of the foaming clamp (1) is fixed to the mold changing trolley (4), a mold changing wheel support (181) is installed on the frame (102), a mold changing wheel (182) is installed on the mold changing wheel support (181), and the frame (102) and the front plate (170) are connected by a turning mechanism.

4. The back-injection refrigerator foaming device according to claim 1, characterized in that: The side surface of the lifting and moving frame (120) is slidably connected to the guide column (130).

5. The back-injection refrigerator foaming device according to claim 1, characterized in that: The multi-gun bubble injection robot (2) comprises a support platform (207), a track (205), a gun head (201), a connecting side plate (203), an X-axis drive mechanism (210), a Y-axis drive mechanism (211), a Z-axis drive mechanism (212), a wet machine valve group and a pipeline system (221). The inner side of the support platform (207) is provided with a track (205), the connecting side plate (203) is slidably connected to the track (205), both ends of the X-axis drive mechanism (210) pass through the connecting side plate (203) and are connected to the track (205), the two connecting side plates (203) are connected via a Y-axis, a bottom plate with a Y-axis drive mechanism (211) is installed on the Y-axis, the Z-axis drive mechanism (212) is installed on the Y-axis, the Z-axis drive mechanism (212) is connected to the bottom plate, the gun head (201) is installed on the Z-axis, and the input end of the gun head (201) is connected to the wet machine valve group and the pipeline system.

6. The back-injection refrigerator foaming device according to claim 1, characterized in that: The roller line comprises an inlet roller line (5) and an outlet roller line (6), and an inlet roller line (5) is provided at the rear end of each foaming clamp (1), and the outlet roller line (6) is located in the middle of the inlet roller line (5).

7. A foaming method for a back-injection refrigerator foaming device as claimed in claim 1, characterized in that: The process includes the following steps: Step 1, the clamping manipulator moves the empty box from the drum line to the back foaming inner mold of the foaming fixture, and turns the empty box upside down on the back foaming inner mold; Step 2, the pallet push-pull device pushes the pallet with the empty box and the rear plate mechanism into the front end of the foaming fixture; Step 3, the airbag lifting device drives the lifting motion frame to lift the pallet with the empty box and the rear plate mechanism upward; Step 4, during the lifting process, the side plate and the front plate are parallel to the empty box; Step 5, the top plate contacts the back plate, the spring lifting mechanism is compressed, and the back plate is parallel to the empty box under the action of the back plate connecting rod. box; Step 6, the mold clamping mechanism completes the mold clamping and locking, the multi-gun foam injection robot moves to the set position, and the gun head is inserted into the back of the empty box for foaming; Step 7, after the foaming is completed, the gun head withdraws, and the curing and foaming are performed according to the set time; Step 8, after the curing is completed, the mold clamping mechanism is unlocked, the airbag lifting device is deflated, the lifting motion frame lowers the pallet with the foaming box and the rear plate mechanism together, and the pallet push-pull device translates the pallet with the foaming box and the rear plate mechanism together to the rear end of the foaming fixture; Step 9, the clamping robot moves the foaming box from the back foaming inner mold to the roller line.

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