A structure of an injection molding machine for batch molding

Abstract

The application discloses a kind of batch forming injection molding machine structures, belong to battery shell injection molding field, including injection mold and injection head, injection mold is equipped with shunt cavity and several forming cavities, the shunt cavity is communicated with the injection channel in injection head, the forming cavity is connected with shunt cavity by shunt channel, and the cut mouth is formed between shunt channel and forming cavity, raw material can be respectively entered into multiple forming cavities, to realize the function of simultaneously forming multiple battery shell, solve the problem that injection molding machine of battery shell in prior art can only form one battery shell at a time, and the production efficiency is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery housing injection molding, in particular to a batch molding injection molding machine structure. BACKGROUND

[0002] The existing battery housing is generally formed by injection molding. In the injection molding process, the raw material is extruded into the mold through the extrusion of the injection head to form the required product. In the mold, the inlet of the raw material is located at the bottom of the battery housing. After molding, only the injection head needs to be withdrawn to cut off the redundant material in the injection channel, and only a material cutting point will be formed at the bottom of the battery housing.

[0003] However, in the existing equipment, since the injection channel is aligned with the bottom of the battery housing, an injection head with an extrusion structure can only produce one battery housing at a time, and its efficiency does not meet the production needs of a high-automation assembly line. Therefore, an injection molding machine structure that can simultaneously form multiple battery housings is needed.

[0004] For example, a "injection molding mold" disclosed in Chinese patent document CN102285069A includes a panel, a nozzle push plate, a nozzle plate, an A plate, a push plate, a fixed plate, a bottom plate, a first pull plate, a guide column, a first fixed screw, a second pull plate, a second fixed screw, a spout, a nozzle edge, a large pull rod, a limit screw, and a distance screw. The distance screw of the first pull plate is fixed on the A plate. The deficiency of this patent is that the injection flow channel is aligned with the bottom of the battery housing to be formed, and only one battery housing can be formed at a time, which is low in efficiency and does not meet the production needs of an efficient automated production line. If multiple battery housings need to be formed at the same time, the position of the injection flow channel needs to be changed, which makes it difficult to implement the water cutting process.

[0005] For example, a "battery plastic shell demolding shaping device and process" disclosed in Chinese patent document, with publication number CN109130097A, includes an injection molding machine bed, an electric control box, an injection molding device, a mold closing device, a water gap cutting device, and a rotary output device. The mold closing device includes a fixed mold plate and a mold closing pressure plate assembly. The fixed mold plate has a plastic mold groove. The mold closing pressure plate assembly includes a mold closing pressure plate, which is arranged in cooperation with the plastic mold groove. The shaping and demolding device is arranged on one side of the mold closing device. The shaping and demolding device includes a driving mechanism, a feeding mechanism, and a demolding and shaping mechanism. The demolding and shaping mechanism intermittently acts in the demolding space. After the mold closing device is opened, the shaping and demolding device extends into the demolding space to cut the water gap on the shaped battery plastic shell, and the clamping and demolding assembly clamps and reversely removes the shaped bottle cap. The deficiency of this patent is that one injection molding process can only form one battery shell, the efficiency is low, and the shaping and demolding device needs to extend into the demolding space for demolding, which increases the complex process steps and reduces the production efficiency. SUMMARY

[0006] The present application is to overcome the problem of low production efficiency of the prior art that the injection molding machine can only form one battery shell at a time, and provides a batch molding injection molding machine structure that can simultaneously form multiple battery shells in one injection molding process, and can quickly cut the water gap of multiple battery shells, greatly improving the production efficiency of injection molding, and being more suitable for high-efficiency automatic battery assembly lines.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The present application is a batch molding injection molding machine structure, which includes an injection molding die and an injection molding head. The injection molding die is provided with a shunt cavity and a plurality of forming cavities. The shunt cavity is in communication with the injection channel in the injection molding head. The forming cavities are connected to the shunt cavity through shunt channels, and the shunt channels and the forming cavities form a cutting port.

[0009] In this scheme, due to the presence of the shunt cavity and the shunt channel, the raw material can enter the multiple forming cavities respectively, thereby realizing the function of simultaneously forming multiple battery shell bodies. After the forming is completed, the shunt cavity waste is formed in the shunt cavity. Only the shunt cavity waste needs to be removed, and the water gap of the multiple battery shell bodies can be cut at the same time, without the need to cut the water gap of each battery shell body respectively, thereby greatly improving the production efficiency.

[0010] As preferred, the injection mold comprises a fixed mold and a moving mold, the fixed mold is connected with the injection head, the forming cavity is located in the moving mold, the shunt cavity is located in the fixed mold, the fixed mold is provided with a first shunt cavity forming structure, and the moving mold comprises a product forming structure and a second shunt cavity forming structure. In this scheme, since the shunt cavity is located in the fixed mold, when the forming is completed, the moving mold is separated from the fixed mold, the shunt cavity waste formed in the shunt cavity is also taken out with the moving mold and located outside the moving mold, so that the shunt cavity waste is convenient to take off.

[0011] As preferred, the second shunt cavity forming structure comprises a water gate cutting rotary table, the water gate cutting rotary table is provided with a shunt channel forming groove for forming a shunt channel, and the injection machine structure further comprises a water gate cutting driving structure for driving the water gate cutting rotary table to rotate. In this scheme, after the forming is completed, part of the shunt cavity waste is located in the shunt channel forming groove, when the water gate cutting rotary table rotates, the sidewall of the shunt channel forming groove generates a tangential force on the part of the shunt cavity waste, so that the shunt cavity waste is cut off at several cutting gates at the same time, and the water gate cutting rotary table does not idle.

[0012] As preferred, the injection machine structure further comprises a rack and a moving seat, the moving mold is installed on the moving seat; the water gate cutting driving structure comprises a first water gate cutting trigger structure fixedly installed on the rack and a second water gate cutting trigger structure installed on the moving seat, and further comprises a water gate cutting rotary shaft connected with the water gate cutting rotary table, when the first water gate cutting trigger structure triggers the second water gate cutting trigger structure during the movement of the moving seat, the water gate cutting rotary shaft drives the water gate cutting rotary table to rotate. In this scheme, when the moving seat moves, that is, during the mold opening process, the water gate cutting rotary table rotates to cut off the shunt cavity waste, and the cutting-off process does not affect the overall process of the forming, that is, the cutting-off process does not reduce the production efficiency, and the synchronism of the cutting-off process and the mold opening process can be ensured; the specific implementation of the first water gate cutting trigger structure and the second water gate cutting trigger structure can have various schemes, for example, a reflecting sheet and a reflecting sensor are selected as the first water gate cutting trigger structure and the second water gate cutting trigger structure respectively, when the reflecting sensor receives a reflecting signal, a corresponding servo motor is driven to rotate the water gate cutting rotary shaft.

[0013] As preferred, the first water gate cutting trigger structure comprises a worm gear, the second water gate cutting trigger structure comprises a worm shaft matched with the worm gear, one end of the worm shaft is installed with a first transmission wheel, and one end of the water gate cutting rotary shaft is installed with a second transmission wheel synchronously rotating with the first transmission wheel; this scheme makes the water gate cutting trigger process not need to be controlled by electricity, reduces the cost, is more reliable, and will not cause line winding and the like.

[0014] As preferred, an elastic structure is installed between the water gap cutting rotary disc and the water gap cutting rotary shaft, and the fixed mold is provided with an extrusion protrusion for abutting against the water gap cutting rotary disc; in the mold closing state, the elastic structure is compressed, the water gap cutting rotary disc abuts against the product forming structure, and in the mold opening state, the elastic structure relaxes, and the water gap cutting rotary disc is separated from the product forming structure. In the scheme, the water gap cutting rotary disc can be separated and combined with the product forming structure through movement, so that when the mold is closed for injection molding, the raw material cannot enter the inside of the water gap cutting rotary disc, and when the mold is opened, the water gap cutting rotary disc can rotate smoothly.

[0015] As preferred, the first shunt cavity forming structure comprises a shunt passage forming protrusion partially located in the shunt passage forming groove. This structure makes the part of the shunt cavity waste after forming at the shunt passage sink into the forming groove, avoiding the situation that the part originally located in the shunt passage forming groove is separated from the forming groove due to the plasticity of the shunt cavity waste, causing the water gap cutting rotary disc to idle.

[0016] Therefore, the present application has the following beneficial effects: (1) multiple battery housings can be simultaneously formed in one injection molding process, improving production efficiency; (2) multiple battery housings can be quickly cut for water gap, further improving production efficiency; (3) the water gap cutting process is synchronized with the mold opening process, without affecting production efficiency; (4) the water gap cutting process does not need to be controlled by electricity, which is more cost-effective and reliable; (5) the water gap cutting rotary disc and the product forming structure can be separated, and the rotation is smoother. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 is a schematic diagram of a structure of an injection mold of the present application.

[0019] Figure 3 is a schematic diagram of a side view of a movable mold of the present application.

[0020] Figure 4 is a schematic diagram of a test structure of a fixed mold of the present application.

[0021] Figure 5 is a partial enlarged view of the first water gap cutting trigger structure and the second water gap cutting trigger structure in Figure 1 .

[0022] Figure 6 is a partial enlarged view of the shunt cavity in Figure 2 .

[0023] In the diagram: 1. Feed box; 2. Extrusion channel; 3. Extrusion drive device; 4. Injection head; 5. Frame; 6. Mold opening and closing drive device; 7. Moving mold; 8. Fixed mold; 9. Moving seat; 10. Moving seat guide rail; 11. Diverting cavity; 12. Molding cavity; 13. Injection channel; 14. Diverting channel; 15. Cutting port; 16. Sprue turntable; 17. Molding groove; 18. Molding protrusion; 19. Sprue shaft; 20. Shaft through hole; 21. Extrusion protrusion; 22. Elastic ring; 23. Worm gear; 24. Worm; 25. First transmission wheel; 26. Second transmission wheel; 27. Positioning pin; 28. Positioning pin hole; 29. ​​Recycling box. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-6 In the illustrated embodiment, a batch injection molding machine structure includes a feeding structure and a mold opening / closing structure. The feeding structure includes a feeding box 1, an extrusion channel 2, and an extrusion drive device 3. One end of the extrusion channel is equipped with an injection head 4. The mold opening / closing structure includes a frame 5, an injection mold, and an mold opening / closing drive device 6. The injection mold includes a movable mold 7 and a fixed mold 8, with the fixed mold connected to the injection head. A movable seat 9 and a movable seat guide rail 10 are mounted on the frame, and the movable mold is mounted on the movable seat.

[0026] When the injection mold is closed, it has a flow divider cavity 11 and several molding cavities 12 inside. The molding cavities are arranged circumferentially around the flow divider cavity. In this embodiment, six molding cavities are evenly distributed circumferentially around the flow divider cavity. The flow divider cavity is connected to the injection channel 13 in the injection head. The molding cavities are connected to the flow divider cavity through the flow divider channel 14, and a cutting port 15 is formed between the flow divider channel and the molding cavity. The molding cavity is located in the moving mold, and the flow divider cavity is located in the fixed mold. The fixed mold has a first flow divider cavity molding structure. The moving mold includes a product molding structure and a second flow divider cavity molding structure. The gap between the first flow divider cavity molding structure and the second flow divider cavity molding structure is the flow divider cavity.

[0027] The second diversion cavity forming structure includes a water-cutting turntable 16, which is provided with diversion channel forming grooves 17 evenly distributed circumferentially for forming diversion channels. The first diversion cavity forming structure includes a diversion channel forming protrusion 18 partially located within the diversion channel forming groove.

[0028] The water gate cutting rotary disc is also connected with a water gate cutting rotary shaft 19. A rotary shaft through hole 20 is arranged in the product forming structure, the diameter of the rotary shaft through hole is larger than the outer diameter of the water gate cutting rotary shaft and smaller than the outer diameter of the water gate cutting rotary disc. An elastic structure is arranged between the water gate cutting rotary disc and the water gate cutting rotary shaft, and the fixed mold is provided with an extrusion block 21 for abutting against the water gate cutting rotary disc. In the mold closing state, the elastic structure is compressed, the water gate cutting rotary disc abuts against the product forming structure, and in the mold opening state, the elastic structure relaxes, and the water gate cutting rotary disc is separated from the product forming structure. In the embodiment, the elastic structure is an elastic ring 22, and the elastic ring is fixed on both sides of the water gate cutting rotary disc and the water gate cutting rotary shaft. In other equivalent embodiments, the elastic structure can also be a combination of a spring and a shaft hole.

[0029] The injection molding machine structure further comprises a water gate cutting driving structure for driving the rotation of the water gate cutting rotary disc. The water gate cutting driving structure comprises a first water gate cutting trigger structure fixedly installed on the rack and a second water gate cutting trigger structure installed on the moving seat. When the first water gate cutting trigger structure triggers the second water gate cutting trigger structure during the movement of the moving seat, the water gate cutting rotary shaft drives the rotation of the water gate cutting rotary disc. The first water gate cutting trigger structure comprises a worm gear 23, and the second water gate cutting trigger structure comprises a worm shaft 24 matched with the worm gear. One end of the worm shaft is provided with a first transmission wheel 25, and one end of the water gate cutting rotary shaft is provided with a second transmission wheel 26 which rotates synchronously with the first transmission wheel.

[0030] The moving mold is further provided with a positioning pin 27, and the fixed mold is provided with a positioning pin hole 28 matched with the positioning pin.

[0031] The rack is further provided with a recycling box 29 for receiving the waste of the shunt cavity.

[0032] The mold closing injection process of the device is as follows: the mold opening and closing driving device drives the moving seat to move on the moving seat guide rail, so that the moving mold moves towards the fixed mold and performs mold closing. During the mold closing process, the positioning pin is inserted into the positioning pin hole. After the mold closing, the shunt cavity is formed between the first shunt cavity forming structure and the second shunt cavity forming structure, and the forming cavity is formed between the fixed mold and the product forming structure. Then, the extrusion driving device drives the screw structure in the extrusion channel to rotate, so that the raw material is extruded into the shunt cavity through the injection head. After the shunt cavity is filled, the raw material enters each forming cavity. After the injection is completed, the molding is started.

[0033] The mold opening and demolding process of the device is that the opening and closing mold driving device drives the moving seat to move on the moving seat guide rail, so that the moving mold back moves away from the fixed mold and opens. During the opening process, the shunt cavity waste in the shunt cavity separates from the fixed mold and performs the first material cutting; in the process of separating the extrusion block from the water port cutting rotary disc, the friction force is generated on the shunt cavity waste, so that the gap is generated between the shunt cavity waste and the water port cutting rotary disc; at the same time, under the action of the elastic structure, the gap is also generated between the water port cutting rotary disc and the product forming structure, the gap at this time is the small gap caused by the plastic shunt cavity waste, and the elastic structure has not completely recovered. When the worm moves to the worm wheel, the two are engaged, and since the worm wheel is fixed, the moving seat continues to move, so the worm rotates and drives the first transmission wheel, the second transmission wheel and the water port cutting shaft to rotate. After the water port cutting shaft rotates, under the action of the tangential force of the shunt passage forming groove side wall, the cutting material port breaks at each cutting material port, the second material cutting is generated, so that the shunt cavity waste is separated from the battery shell in the forming cavity; at this time, under the action of the elastic structure, the water port cutting rotary disc pops out to the outside, so that the water port cutting waste falls downward to the recycling box. After the mold is opened, the material taking manipulator is inserted between the fixed mold and the moving mold, and the battery shell in the forming cavity is sucked out by the material taking suction cup.

Claims

1. A structure of a batch molding injection molding machine characterized by, The injection molding machine structure comprises an injection mold and an injection head, the injection mold is internally provided with a distribution cavity and a plurality of forming cavities, the distribution cavity is communicated with an injection channel in the injection head, the forming cavities are connected with the distribution cavity through distribution channels, the distribution channels and the forming cavities form cutting ports, the injection mold comprises a fixed mold and a movable mold, the movable mold comprises a product forming structure and a second distribution cavity forming structure, the second distribution cavity forming structure comprises a cutting port rotary table, the cutting port rotary table is provided with distribution channel forming grooves for forming the distribution channels.

2. A bulk molding injection molding machine structure according to claim 1, wherein The fixed mold is connected with the injection head, the forming cavities are located in the movable mold, the distribution cavity is located in the fixed mold, and the fixed mold is internally provided with a first distribution cavity forming structure.

3. A bulk molding injection molding machine structure according to claim 2, wherein, The injection molding machine structure further comprises a cutting port driving structure for driving the cutting port rotary table to rotate.

4. A bulk molding injection molding machine structure according to claim 3, wherein The injection molding machine structure further comprises a rack and a moving seat, the movable mold is installed on the moving seat, the cutting port driving structure comprises a first cutting port trigger structure fixedly installed on the rack and a second cutting port trigger structure installed on the moving seat, and further comprises a cutting port rotary shaft connected with the cutting port rotary table, when the first cutting port trigger structure triggers the second cutting port trigger structure during the movement of the moving seat, the cutting port rotary shaft drives the cutting port rotary table to rotate.

5. A bulk molding injection molding machine structure according to claim 4, wherein The first cutting port trigger structure comprises a worm gear, the second cutting port trigger structure comprises a worm shaft matched with the worm gear, one end of the worm shaft is installed with a first transmission wheel, and one end of the cutting port rotary shaft is installed with a second transmission wheel synchronously rotating with the first transmission wheel.

6. A bulk molding injection molding machine structure according to claim 4 wherein, An elastic structure is installed between the cutting port rotary table and the cutting port rotary shaft, and the fixed mold is internally provided with a pressing protrusion for abutting against the cutting port rotary table; in the mold closing state, the elastic structure is compressed, the cutting port rotary table abuts against the product forming structure, and in the mold opening state, the elastic structure is relaxed, and the cutting port rotary table is separated from the product forming structure.

7. A bulk molding injection molding machine structure according to any one of claims 3-6, characterized in that, The first distribution cavity forming structure comprises a distribution channel forming protrusion partially located in the distribution channel forming groove.

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