A dual material sandwich injection molding device and a control method thereof

Abstract

The application discloses a double-material sandwich injection molding device, and relates to the technical field of injection molding devices.The device comprises a base, and a box body A is fixedly installed on the top surface of the base.In the application, the materials are injected into the through grooves A and B through the pump body A, the pump body B and the connecting pipe, and then the materials are injected into the first chamber and the second chamber through the through grooves A and B.Finally, the materials in the first chamber and the second chamber are injected into the injection mold through the piston rod A and the piston rod B driven by the hydraulic pump A and the hydraulic pump B.After the first injection is completed, the rotating plate is driven to rotate by the motor C, and then the materials in the first chamber and the second chamber are injected into the injection mold through the piston rod A and the piston rod B driven by the hydraulic pump A and the hydraulic pump B after the injection chamber of the injection mold is adjusted, so that the sandwich injection of the double materials is completed, and the mixing of the materials without shaping is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding device, in particular to a double material sandwich injection molding device and a control method thereof. BACKGROUND

[0002] The injection molding device is an industrial equipment for heating plastic or other materials to a molten state, then injecting them into a mold under high pressure, and cooling to form. This equipment is widely used in the manufacture of plastic parts, products and other complex shapes of materials.

[0003] As the disclosure number: CN202702544U "double material sandwich injection molding system", including screw, machine cylinder, first barrel and second barrel, the screw is sleeved in the machine cylinder, the screw is two section structure, including first section and second section, the first section and the second section are equipped with sealing device, the first section center is provided with flow channel, the second section front end outer wall is equipped with the hole that communicates with the flow channel, the second section rear end is connected with first drive device, the first barrel is installed above the second section, the second barrel is installed above the first section. The utility model discloses double material sandwich injection molding system, and two sets of feeding devices are used in one operation to simultaneously plasticize and inject two materials to form, wherein one material completely surrounds another material, and the structure is simple, and the production cost can be reduced.

[0004] But in the prior art, although the injection molding device plays the effect of using a set of screw cylinder two sets of feeding devices in one operation to simultaneously plasticize and inject two materials to form, wherein one material completely surrounds another material, the structure is simple, and the production cost can be reduced, but there is a deficiency in preventing the mixing of injection materials. Since the injection device is injected by a set of screw cylinder, when two different materials are injected at the same time, the two different materials will mix together when not shaping, so that the sandwich injection of two different materials cannot be guaranteed. SUMMARY

[0005] The present application aims to provide a double material sandwich injection molding device and a control method thereof, to solve the problem that two different materials will mix together when not shaping due to the injection device being injected by a set of screw cylinder.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A double material sandwich injection molding device, including base, the top surface of base is fixedly installed with box A, the top surface of box A is fixedly installed with material box A and material box B, the output end of material box A and material box B is installed with pump body A and pump body B respectively, the output end of pump body A is installed with connecting pipe, the surface of base is fixedly installed with motor A, the output end of motor A is installed with lead screw, the surface of base is slidably connected with box B, the inside of box A is fixedly installed with motor B, the output end of motor B is installed with gear A, the inside of box A is rotatably connected with gear B, the surface of gear A and gear B is fixedly installed with stirring rod A and stirring rod B respectively, the inside of box B is fixedly installed with motor C, the inside of box A is provided with through slot A and through slot B, the output end of motor C is installed with rotating plate, the inside of rotating plate is fixedly installed with electric push rod A, the output end of electric push rod A is installed with clamping block, the inside of rotating plate is inserted with insertion block, the surface of insertion block is fixedly installed with injection mold.

[0007] Preferably, the surface of the box A is fixedly installed with hydraulic pump A and hydraulic pump B, the output end of the hydraulic pump A and the hydraulic pump B is installed with piston rod A and piston rod B respectively, the inside of the box A is provided with first chamber and second chamber respectively, the output end of the first chamber and the second chamber is fixedly installed with check valve.

[0008] Preferably, the piston rod A is slidably connected between the first chamber, the piston rod B is slidably connected between the second chamber, the surface of the gear A and the gear B is sleeved with the sprocket chain A, the gear A and the gear B are engaged with the sprocket chain A.

[0009] Preferably, the lead screw is rotatably connected between the base, the box B is connected with the lead screw through thread, the rotating plate is rotatably connected with the box B, the injection mold is rotatably connected with the box B, the insertion block is slidably connected with the rotating plate, the clamping block is slidably connected with the insertion block, one end of the through slot A is connected to the output end of the pump body A, the other end is connected to the input end of the first chamber, one end of the through slot B is connected to the output end of the connecting pipe, the other end is connected to the input end of the second chamber.

[0010] Preferably, the surface of the box A is provided with clamping groove, the inside of the box B is fixedly installed with motor D, the output end of the motor D is installed with gear C, the inside of the box B is rotatably connected with gear D, the surface of the gear D is fixedly installed with connecting rod A, one end of the connecting rod A is fixedly installed with clamping block A, the surface of the gear C is fixedly installed with gear E, the inside of the box B is rotatably connected with gear F, the surface of the gear F is fixedly installed with connecting rod B, one end of the connecting rod B is fixedly installed with clamping block B.

[0011] Preferably, the gear E is rotatably connected to the housing B, the connecting rod A and the connecting rod B are both rotatably connected to the housing B, the clamping block A and the clamping block B are both slidably connected to the housing B, and the clamping block A and the clamping block B are both slidably connected to the slot.

[0012] Preferably, gear C and gear D are fitted with a tooth chain B, and gear C and gear D mesh with the tooth chain B, while gear E and gear F mesh with each other.

[0013] Preferably, a feeding box is fixedly installed on the top surface of both the material box A and the material box B. An electric push rod B is fixedly installed inside the feeding box. A push block is installed at the output end of the electric push rod B. A rotating rod is rotatably connected inside the feeding box. A torsion spring is sleeved on the surface of the rotating rod. A cover plate is fixedly installed at one end of the rotating rod. A sealing gasket B is fixedly installed on the bottom surface of the cover plate.

[0014] Preferably, one end of the torsion spring is connected to the side of the cover plate and the other end is connected to the inner surface of the feed box, the top surface of the push block is an arc surface, and the push block is slidably connected to the feed box.

[0015] A control method for a dual-material sandwich injection molding apparatus includes the following steps:

[0016] S1. Motor B drives gear A to rotate. When gear A rotates, it drives gear B to rotate through gear chain A, thereby driving stirring rod A and stirring rod B to rotate and stirring the material inside material box A and material box B. Then, the material is injected into through channel A and through channel B through pump body A and pump body B and connecting pipe. Then, through channel A and through channel B, the material is injected into the first chamber and the second chamber. Finally, hydraulic pump A and hydraulic pump B drive piston rod A and piston rod B to inject the material in the first chamber and the second chamber into the injection mold.

[0017] S2. After the first injection is completed, the rotating plate is driven by motor C to rotate. After the injection mold rotates the injection chamber, the materials of the first and second chambers are injected into the injection mold again by hydraulic pumps A and B and piston rods A and B, thus completing the sandwich injection of dual materials. When it is necessary to replace the injection mold, the clamping block is moved by electric push rod A. After the clamping block slides out of the insert block, the injection mold can be pulled out from the rotating plate through the insert block. Then, injection molds of different models are inserted into the rotating plate through the insert block. Then, electric push rod A drives the clamping block to insert into the insert block, thus completing the replacement of the injection mold.

[0018] S3. The motor D drives the gear C to rotate, which in turn drives the gear E to rotate, and the gear E drives the gear F to rotate. While the gear C is rotating, it also drives the gear D to rotate through the gear chain B. This, in turn, drives the clamping blocks A and B to rotate in opposite directions through the connecting rods A and B, thereby completing the clamping of the injection mold.

[0019] S4. The push block is moved upward by the electric push rod B. When the push block moves upward, it will drive the cover plate and the rotating rod to rotate. After the cover plate is opened, the material box A or the material box B can be filled through the feeding box. After the filling is completed, the push block is moved downward by the electric push rod B. As the push block gradually moves away from the cover plate, the cover plate will be rotated by the torsion force of the torsion spring until the cover plate completely closes the feeding box A or the feeding box B.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, materials are injected into through channels A and B via pump bodies A and B and connecting pipes. Then, through channels A and B, materials are injected into the first and second chambers. Finally, hydraulic pumps A and B drive piston rods A and B to inject materials from the first and second chambers into the injection mold. After the first injection is completed, motor C drives the rotating plate to rotate. After the injection mold rotates the injection chambers, hydraulic pumps A and B drive piston rods A and B again to inject materials from the first and second chambers into the injection mold, thereby completing the sandwich injection of dual materials and avoiding mixing when the materials are not yet shaped.

[0022] 2. In this invention, the motor D drives the gear C to rotate, the gear C drives the gear E to rotate, and the gear E drives the gear F to rotate. While the gear C is rotating, it also drives the gear D to rotate through the gear chain B. This, in turn, drives the clamping blocks A and B to rotate in opposite directions through the connecting rods A and B, thereby completing the clamping of the injection mold and assisting the operator in disassembling and replacing the injection mold.

[0023] 3. In this invention, the electric push rod B drives the push block to move upward. When the push block moves upward, it drives the cover plate and the rotating rod to rotate. After the cover plate opens, material can be injected into material box A or material box B through the feeding box. After the material is injected, the electric push rod B drives the push block to move downward. As the push block gradually moves away from the cover plate, the cover plate will be rotated by the torsion force of the torsion spring until the cover plate completely closes the feeding box A or feeding box B, thereby preventing dust or impurities from entering the material box A or material box B and causing the material to be contaminated. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of a dual-material sandwich injection molding device according to the present invention;

[0025] Figure 2 This is a longitudinal sectional view of a dual-material sandwich injection molding apparatus according to the present invention;

[0026] Figure 3 This invention relates to a dual-material sandwich injection molding apparatus. Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a cross-sectional view of a dual-material sandwich injection molding apparatus according to the present invention;

[0028] Figure 5 This is an exploded structural diagram of the motor C and the injection mold in a dual-material sandwich injection molding device of the present invention;

[0029] Figure 6 This invention relates to a dual-material sandwich injection molding apparatus. Figure 5 Enlarged view of point B in the middle;

[0030] Figure 7 This is an exploded structural diagram of the motor D, clamping block A, and clamping block B in a dual-material sandwich injection molding device of the present invention.

[0031] Figure 8 This invention relates to a dual-material sandwich injection molding apparatus. Figure 7 Enlarged view of point C in the middle;

[0032] Figure 9 This is an exploded structural diagram of the cover plate in a dual-material sandwich injection molding device of the present invention;

[0033] Figure 10 This invention relates to a dual-material sandwich injection molding apparatus. Figure 9 Enlarged view of point D in the middle.

[0034] In the diagram: 100, base; 101, housing A; 102, hydraulic pump A; 103, hydraulic pump B; 104, piston rod A; 105, piston rod B; 106, first chamber; 107, second chamber; 108, check valve; 109, hopper A; 110, hopper B; 111, pump body A; 112, pump body B; 113, connecting pipe; 114, motor A; 115, lead screw; 116, housing B; 117, motor B; 118, gear A; 119, gear B; 120, gear chain A; 121, stirring rod A; 122, stirring rod B; 124, motor. C; 125. Through slot A; 126. Through slot B; 127. Rotating plate; 128. Electric push rod A; 129. Clamping block; 130. Inserting block; 131. Injection mold; 200. Slot; 201. Motor D; 202. Gear C; 203. Gear chain B; 204. Gear D; 205. Connecting rod A; 206. Clamping block A; 207. Gear E; 208. Gear F; 209. Connecting rod B; 210. Clamping block B; 300. Feed box; 301. Electric push rod B; 302. Push block; 303. Rotating rod; 304. Torsion spring; 305. Cover plate; 306. Sealing gasket B. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Refer to Figures 1-6As shown: A dual-material sandwich injection molding device includes a base 100, a housing A101 fixedly mounted on the top surface of the base 100, a material bin A109 and a material bin B110 fixedly mounted on the top surface of the housing A101, a pump body A111 and a pump body B112 respectively mounted on the output ends of the material bins A109 and B110, a connecting pipe 113 mounted on the output end of the pump body A111, a motor A114 fixedly mounted on the surface of the base 100, a lead screw 115 mounted on the output end of the motor A114, a housing B116 slidably connected to the surface of the base 100, and a motor B117 fixedly mounted inside the housing A101. The output end of the housing is equipped with gear A118, and gear B119 is rotatably connected inside the housing A101. Stirring rods A121 and B122 are fixedly mounted on the surfaces of gears A118 and B119, respectively. Motor C124 is fixedly mounted inside the housing B116. Through slots A125 and B126 are provided inside the housing A101. A rotating plate 127 is installed at the output end of motor C124. An electric push rod A128 is fixedly mounted inside the rotating plate 127. A locking block 129 is installed at the output end of the electric push rod A128. An insert block 130 is inserted inside the rotating plate 127, and an injection mold is fixedly mounted on the surface of the insert block 130. 131. A hydraulic pump A102 and a hydraulic pump B103 are fixedly mounted on the surface of housing A101. Piston rods A104 and B105 are respectively mounted on the output ends of hydraulic pumps A102 and B103. A first chamber 106 and a second chamber 107 are respectively opened inside housing A101. Check valves 108 are fixedly mounted on the output ends of both chambers 106 and 107. Piston rod A104 is slidably connected to the first chamber 106, and piston rod B105 is slidably connected to the second chamber 107. Gears A118 and B119 are fitted with a toothed chain A120. Gear A118 and gear B119 are connected to each other. Wheel B119 meshes with toothed chain A120. Lead screw 115 is rotatably connected to base 100. Housing B116 is threadedly connected to lead screw 115. Rotating plate 127 is rotatably connected to housing B116. Injection mold 131 is rotatably connected to housing B116. Insert block 130 is slidably connected to rotating plate 127. Locking block 129 is slidably connected to insert block 130. One end of through groove A125 is connected to the output end of pump body A111, and the other end is connected to the input end of first chamber 106. One end of through groove B126 is connected to the output end of connecting pipe 113, and the other end is connected to the input end of second chamber 107.

[0037] In this embodiment, materials are injected into through channels A125 and B126 via pump bodies A111 and B112 and connecting pipe 113. Then, through channels A125 and B126, materials are injected into the first chamber 106 and the second chamber 107. Finally, hydraulic pumps A102 and B103 drive piston rods A104 and B105 to inject materials from the first chamber 106 and the second chamber 107 into the injection mold 131. After the first injection is completed, motor C124 drives the rotating plate 127 to rotate. After the injection mold 131 rotates the injection chambers, hydraulic pumps A102 and B103 drive piston rods A104 and B105 to inject materials from the first chamber 106 and the second chamber 107 into the injection mold 131 again. This completes the sandwich injection of dual materials and avoids mixing when the materials are not shaped.

[0038] The electric push rod A128 drives the locking block 129 to move. After the locking block 129 slides out of the insertion block 130, the injection mold 131 can be pulled out from the rotating plate 127 through the insertion block 130. Then, injection molds of different models 131 are inserted into the rotating plate 127 through the insertion block 130. The electric push rod A128 then drives the locking block 129 to insert into the insertion block 130, thereby completing the replacement of the injection mold 131.

[0039] Example 2: Figures 7-8 As shown, a slot 200 is formed on the surface of housing A101. A motor D201 is fixedly installed inside housing B116. A gear C202 is installed at the output end of motor D201. A gear D204 is rotatably connected inside housing B116. A connecting rod A205 is fixedly installed on the surface of gear D204. A clamping block A206 is fixedly installed at one end of connecting rod A205. A gear E207 is fixedly installed on the surface of gear C202. A gear F208 is rotatably connected inside housing B116. A connecting rod B209 is fixedly installed on the surface of gear F208. One end of 09 is fixedly installed with a clamping block B210. Gear E207 is rotatably connected to housing B116. Connecting rod A205 and connecting rod B209 are both rotatably connected to housing B116. Clamping blocks A206 and B210 are both slidably connected to housing B116. Clamping blocks A206 and B210 are both slidably connected to slot 200. Gear chain B203 is sleeved on the surface of gear C202 and gear D204. Gear C202 and gear D204 are meshed with gear chain B203. Gear E207 and gear F208 are meshed with each other.

[0040] In this embodiment, the motor D201 drives the gear C202 to rotate, which in turn drives the gear E207 to rotate. The gear E207 then drives the gear F208 to rotate. While the gear C202 is rotating, it also drives the gear D204 to rotate via the gear chain B203. This, in turn, drives the clamping blocks A206 and B210 to rotate in opposite directions via the connecting rods A205 and B209, thereby clamping the injection mold 131 and assisting the operator in disassembling and replacing the injection mold 131.

[0041] Example 3: According to Figures 9-10 As shown, a feed box 300 is fixedly installed on the top surface of both feed boxes A109 and B110. An electric push rod B301 is fixedly installed inside the feed box 300. A push block 302 is installed at the output end of the electric push rod B301. A rotating rod 303 is rotatably connected inside the feed box 300. A torsion spring 304 is sleeved on the surface of the rotating rod 303. A cover plate 305 is fixedly installed at one end of the rotating rod 303. A sealing gasket B306 is fixedly installed on the bottom surface of the cover plate 305. One end of the torsion spring 304 is connected to the side of the cover plate 305, and the other end is connected to the inner surface of the feed box 300. The top surface of the push block 302 is an arc surface, and the push block 302 is slidably connected to the feed box 300.

[0042] In this embodiment, the electric push rod B301 drives the push block 302 to move upward. When the push block 302 moves upward, it drives the cover plate 305 to rotate the rotating rod 303. After the cover plate 305 is rotated open, the material box A109 or material box B110 can be filled through the feeding box 300. After the filling is completed, the electric push rod B301 drives the push block 302 to move downward. As the push block 302 gradually moves away from the cover plate 305, the cover plate 305 will be rotated by the torsion force of the torsion spring 304 until the cover plate 305 completely closes the feeding box 300A109 or feeding box 300B110. This prevents dust or impurities from entering the material box A109 or material box B110 and causing material contamination.

[0043] The operating method and working principle of this device are as follows: When material injection is required, first turn on motor B117. Motor B117 drives gear A118 to rotate. When gear A118 rotates, it drives gear B119 to rotate through gear chain A120, thereby driving stirring rods A121 and B122 to rotate and stirring the materials inside material bins A109 and B110. Then, the material is injected into through channels A125 and B126 through pump bodies A111 and B112 and connecting pipe 113. Finally, through through channels A125 and B126, the material is injected into the first chamber 10. In the first and second chambers 106 and 107, the materials of the first and second chambers 107 are injected into the injection mold 131 by the piston rods A104 and B105 driven by the hydraulic pumps A102 and B103. After the first injection is completed, the rotating plate 127 is rotated by the motor C124. After the injection mold 131 turns the injection chambers, the materials of the first and second chambers 106 and 107 can be injected into the injection mold 131 again by the piston rods A104 and B105 driven by the hydraulic pumps A102 and B103, thus completing the sandwich injection of the two materials.

[0044] When it is necessary to replace the injection mold 131, simply move the locking block 129 by using the electric push rod A128. After the locking block 129 slides out of the insertion block 130, the injection mold 131 can be pulled out of the rotating plate 127 through the insertion block 130. Then, insert the injection mold 131 of different models into the rotating plate 127 through the insertion block 130, and then use the electric push rod A128 to move the locking block 129 into the insertion block 130, thereby completing the replacement of the injection mold 131.

[0045] When the staff changes the injection mold 131, the motor D201 is turned on first. The motor D201 drives the gear C202 to rotate, which in turn drives the gear E207 to rotate. The gear E207 then drives the gear F208 to rotate. While the gear C202 is rotating, it also drives the gear D204 to rotate through the gear chain B203. This, in turn, drives the clamping blocks A206 and B210 to rotate in the opposite direction through the connecting rods A205 and B209, thereby clamping the injection mold 131 and thus assisting in loading and unloading the injection mold 131 when changing it.

[0046] When it is necessary to fill material bins A109 or B110, first open the electric push rod B301. The electric push rod B301 drives the push block 302 to move upward. When the push block 302 moves upward, it will drive the cover plate 305 to rotate the rotating rod 303. After the cover plate 305 is rotated open, material bins A109 or B110 can be filled through the feed box 300. After the filling is completed, the electric push rod B301 drives the push block 302 to move downward. As the push block 302 gradually moves away from the cover plate 305, the cover plate 305 will be rotated by the torsion force of the torsion spring 304 until the cover plate 305 completely closes the feed box 300A109 or feed box 300B110.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-material sandwich injection molding device, comprising a base (100), characterized in that: A housing A (101) is fixedly installed on the top surface of the base (100). A material bin A (109) and a material bin B (110) are fixedly installed on the top surface of the housing A (101). Pump bodies A (111) and B (112) are respectively installed at the output ends of the material bins A (109) and B (110). A connecting pipe (113) is installed at the output end of the pump body A (111). A motor A (114) is fixedly installed on the surface of the base (100). A lead screw (115) is installed at the output end of the motor A (114). A housing B (116) is slidably connected to the surface of the base (100). A motor B (117) is fixedly installed inside the housing A (101). A gear A (118) is installed at the output end of the motor B (117). Gear B (119) is rotatably connected inside the housing A (101). Stirring rod A (121) and stirring rod B (122) are fixedly installed on the surfaces of gear A (118) and gear B (119), respectively. Motor C (124) is fixedly installed inside the housing B (116). Through slot A (125) and through slot B (126) are opened inside the housing A (101). Rotating plate (127) is installed at the output end of motor C (124). Electric push rod A (128) is fixedly installed inside the rotating plate (127). Locking block (129) is installed at the output end of electric push rod A (128). Insertion block (130) is inserted inside the rotating plate (127). Injection mold (131) is fixedly installed on the surface of insertion block (130). Hydraulic pump A (102) and hydraulic pump B (103) are fixedly installed on the surface of the housing A (101). Piston rod A (104) and piston rod B (105) are respectively installed at the output ends of hydraulic pump A (102) and hydraulic pump B (103). The housing A (101) has a first chamber (106) and a second chamber (107) respectively. Check valves (108) are fixedly installed at the output ends of the first chamber (106) and the second chamber (107). The lead screw (115) is rotatably connected to the base (100), the housing B (116) is threadedly connected to the lead screw (115), the rotating plate (127) is rotatably connected to the housing B (116), the injection mold (131) is rotatably connected to the housing B (116), the insert block (130) is slidably connected to the rotating plate (127), the locking block (129) is slidably connected to the insert block (130), one end of the through groove A (125) is connected to the output end of the pump body A (111), and the other end is connected to the input end of the first chamber (106), one end of the through groove B (126) is connected to the output end of the connecting pipe (113), and the other end is connected to the input end of the second chamber (107).

2. The dual-material sandwich injection molding apparatus according to claim 1, characterized in that: The piston rod A (104) is slidably connected to the first chamber (106), the piston rod B (105) is slidably connected to the second chamber (107), and the surfaces of the gears A (118) and B (119) are fitted with a toothed chain A (120), and the gears A (118) and B (119) are meshed with the toothed chain A (120).

3. The dual-material sandwich injection molding apparatus according to claim 2, characterized in that: The surface of the housing A (101) is provided with a slot (200). The inside of the housing B (116) is fixedly installed with a motor D (201). The output end of the motor D (201) is equipped with a gear C (202). The inside of the housing B (116) is rotatably connected with a gear D (204). The surface of the gear D (204) is fixedly installed with a connecting rod A (205). One end of the connecting rod A (205) is fixedly installed with a clamping block A (206). The surface of the gear C (202) is fixedly installed with a gear E (207). The inside of the housing B (116) is rotatably connected with a gear F (208). The surface of the gear F (208) is fixedly installed with a connecting rod B (209). One end of the connecting rod B (209) is fixedly installed with a clamping block B (210).

4. The dual-material sandwich injection molding apparatus according to claim 3, characterized in that: The gear E (207) is rotatably connected to the housing B (116), the connecting rod A (205) and the connecting rod B (209) are both rotatably connected to the housing B (116), the clamping block A (206) and the clamping block B (210) are both slidably connected to the housing B (116), and the clamping block A (206) and the clamping block B (210) are both slidably connected to the slot (200).

5. The dual-material sandwich injection molding apparatus according to claim 4, characterized in that: The surfaces of gears C (202) and D (204) are fitted with toothed chains B (203), and gears C (202) and D (204) mesh with toothed chains B (203). Gears E (207) and F (208) mesh with each other.

6. The dual-material sandwich injection molding apparatus according to claim 5, characterized in that: The top surfaces of both material bins A (109) and B (110) are fixedly equipped with feed boxes (300). An electric push rod B (301) is fixedly installed inside the feed box (300). A push block (302) is installed at the output end of the electric push rod B (301). A rotating rod (303) is rotatably connected inside the feed box (300). A torsion spring (304) is sleeved on the surface of the rotating rod (303). A cover plate (305) is fixedly installed at one end of the rotating rod (303). A sealing gasket B (306) is fixedly installed on the bottom surface of the cover plate (305).

7. The dual-material sandwich injection molding apparatus according to claim 6, characterized in that: One end of the torsion spring (304) is connected to the side of the cover plate (305), and the other end is connected to the inner surface of the feed box (300). The top surface of the push block (302) is an arc surface, and the push block (302) is slidably connected to the feed box (300).

8. A control method for a dual-material sandwich injection molding apparatus, characterized in that, The dual-material sandwich injection molding apparatus according to any one of claims 1-7 includes the following steps: S1. The motor B (117) drives the gear A (118) to rotate. When the gear A (118) rotates, it drives the gear B (119) to rotate through the gear chain A (120), thereby driving the stirring rod A (121) and stirring rod B (122) to rotate, and stirring the materials inside the material box A (109) and material box B (110). Then, the materials are stirred through the pump body A (111) and pump body B (112) and the connecting pipe (113). Material is injected into channel A (125) and channel B (126), and then channel A (125) and channel B (126) inject the material into the first chamber (106) and the second chamber (107). Finally, hydraulic pump A (102) and hydraulic pump B (103) drive piston rod A (104) and piston rod B (105) to inject the material from the first chamber (106) and the second chamber (107) into the injection mold (131). S2. After the first injection is completed, the rotating plate (127) is driven by motor C (124) to rotate. After the injection mold (131) rotates the injection chamber, the piston rods A (104) and B (105) are driven by hydraulic pump A (102) and hydraulic pump B (103) to inject the material of the first chamber (106) and the second chamber (107) into the injection mold (131), thereby completing the sandwich injection of the two materials. When it is necessary to replace the injection mold (131) When needed, simply move the locking block (129) by using the electric push rod A (128). After the locking block (129) slides out of the insert block (130), the injection mold (131) can be pulled out from the rotating plate (127) through the insert block (130). Then, insert the injection mold (131) of different models into the rotating plate (127) through the insert block (130). Then, the electric push rod A (128) drives the locking block (129) to insert into the insert block (130), thereby completing the replacement of the injection mold (131). S3. The motor D (201) drives the gear C (202) to rotate. The gear C (202) drives the gear E (207) to rotate, and the gear E (207) drives the gear F (208) to rotate. While the gear C (202) is rotating, it also drives the gear D (204) to rotate through the gear chain B (203). Thus, the connecting rod A (205) and connecting rod B (209) drive the clamping block A (206) and clamping block B (210) to rotate in opposite directions, thereby completing the clamping of the injection mold (131). S4. Drive the push block (302) upward by the electric push rod B (301). When the push block (302) moves upward, it will drive the cover plate (305) to drive the rotating rod (303) to rotate. After the cover plate (305) is opened, the material box A (109) or material box B (110) can be filled through the feeding box (300). After the filling is completed, the push block (302) can be driven downward by the electric push rod B (301). As the push block (302) gradually moves away from the cover plate (305), the cover plate (305) will be rotated by the torsion of the torsion spring (304) until the cover plate (305) completely closes the feeding box (300) A (109) or feeding box (300) B (110).

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