Sprue structure of injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold sprue structure which comprises an injection molding machine sprue, a fixed mold core is arranged on the outer wall of the injection molding machine sprue, a movable mold core is arranged above the fixed mold core, a groove matched with an injection molding part is formed in the inner wall of the movable mold core, and a groove matched with the injection molding part is formed in the inner wall of the fixed mold core. The inner wall of the fixed mold core is movably connected with a push-out mechanism capable of spraying a release agent, and the periphery of the fixed mold core is provided with a cleaning mechanism capable of cleaning residues generated after injection molding. According to the scheme, by arranging the fixed mold core and the movable mold core, injection molding of a mobile phone shell is conveniently achieved through the effect of arranging the side wall pouring gate, meanwhile, the rapid demolding effect is achieved under the cooperative use of the pushing-out mechanism, and meanwhile when residues appear on the surface of the mold after multiple times of injection molding are completed, the surface of the fixed mold core can be cleaned through the cleaning mechanism at the moment.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to a gate structure of an injection mold. Background Art

[0002] Through a specific structural design and processing technology, an injection mold can inject molten plastic into a mold cavity, allowing it to cool and form into the desired plastic product. It typically consists of a cavity, a core, a demolding mechanism, and a cooling system. Mobile phone cases, as plastic parts, are injection molded. However, high-quality mobile phone cases require high processing quality and are designed to fit the phone perfectly. Currently, the most widely used injection mold gate structures in the market often use straight gates, side gates, or latent gates. While these traditional gate structures meet basic injection molding requirements, they are prone to debris generation around the gate, a major pain point in the industry. Specifically, during the injection molding process, the plastic melt enters the mold cavity under high pressure through the gate. After cooling and solidification, unexhausted plastic debris often remains at the gate. This debris not only affects the product's appearance and quality, but also increases the cost and difficulty of subsequent processing steps (such as deburring and polishing). It can also damage the mold, shorten its lifespan, and increase maintenance costs. To address this issue, we propose an injection mold gate structure to address this issue. Utility Model Content

[0003] In order to solve the above-mentioned problem that after processing with traditional straight gate, a part of the injection protrusion will still remain during the processing, and the gate needs to be manually polished, thereby increasing the processing cost, the present application provides an injection mold gate structure.

[0004] The present application provides an injection mold gate structure that adopts the following technical solution:

[0005] An injection mold gate structure includes an injection molding machine gate, wherein the outer wall of the injection molding machine gate is provided with a fixed mold core, a movable mold core is provided above the fixed mold core, the inner wall of the movable mold core is provided with a groove adapted to the injection molded part, the inner wall of the fixed mold core is provided with a groove adapted to the injection molded part, the inner wall of the fixed mold core is movably connected to an ejection mechanism capable of spraying a mold release agent, and the outer periphery of the fixed mold core is provided with a cleaning mechanism capable of cleaning residues generated after injection molding;

[0006] The cleaning mechanism includes a pulley, a transmission belt, a first motor bracket, No. 1 motor, a first bevel gear, a second bevel gear, a transmission shaft, a first bearing seat, a second bearing seat, a second motor bracket, No. 2 motor, and a cleaning brush. The two sides of the fixed mold are connected to the first bearing seat by screws, and the outer wall of the fixed mold is provided with a bearing mounting hole. The transmission shaft is rotatably connected to the inner wall of the first bearing seat through a bearing, the pulley ring is arranged on the outer wall of the transmission shaft, the transmission belt is transmission-connected to the outer wall of the pulley, and the second bevel gear ring is arranged on the outer wall of the transmission shaft therein. The outer wall of the fixed mold is fixedly connected to the first motor bracket, the No. 1 motor is fixedly connected to the inner wall of the first motor bracket, the output end of the No. 1 motor is fixedly connected to the inner wall of the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bearing seat is fixedly connected to the outer wall of the transmission belt, the cleaning brush is rotatably connected to the inner wall of the second bearing seat through a bearing, the second motor bracket is fixedly connected to the outer wall of one of the first bearing seats, the No. 2 motor is fixedly connected to the inner wall of the second motor bracket, and one end of the cleaning brush is fixedly connected to the output end of the No. 2 motor.

[0007] Preferably, the injection molding machine gate is in the shape of a circular tube, the lower end of the injection molding machine gate is connected to the injection molding machine, the inner wall of the fixed mold core is provided with a circular hole, and the ejection mechanism is movably connected to the inner wall of the circular hole of the fixed mold core.

[0008] Preferably, the ejection mechanism includes a pin, a hose, a pump, and a release agent storage tank. The pin is slidably connected to the inner wall of the fixed mold core, the inner wall of the pin is provided with a cavity, one end of the hose is fixedly connected to the inner wall of the pin, the output end of the pump is fixedly connected to the hose, and the input end of the pump is connected to the release agent storage tank.

[0009] Preferably, an oily release agent is provided inside the release agent storage box.

[0010] Preferably, the movable mold core includes a second injection runner and an upper mold body, the second injection runner is opened below the upper mold body, the second injection runner includes a concave U-shaped runner and a concave plastic part runner, and the output end of the concave U-shaped runner is connected to the side wall of the concave plastic part runner.

[0011] Preferably, the fixed mold core includes a first injection runner and a lower mold body, the first injection runner is opened above the lower mold body, a circular hole is opened on the inner wall of the lower mold body, the injection molding machine gate is movably connected in the circular hole, the circular hole is connected to the first injection runner, the first injection runner includes a convex U-shaped runner and a convex plastic part runner, and the output end of the convex U-shaped runner is connected to the side wall of the convex plastic part runner.

[0012] Compared with the prior art, the present invention has the following beneficial effects. The fixed mold core and the movable mold core are provided to facilitate the injection molding of the mobile phone case by providing the effect of setting the side wall gate. At the same time, the effect of rapid demolding is achieved with the cooperation of the ejection mechanism. The release agent inside the release agent storage box is sucked out by a pump and then input into the hose. The release agent is then input into the inner wall of the ejector pin, and the mobile phone case is ejected after one injection molding is completed. The release agent is then sprayed by the ejection mechanism to facilitate the next injection molding. When residue appears on the mold surface after multiple injection moldings, the surface of the fixed mold core can be cleaned by the cleaning mechanism. The high-speed rotation and movement of the cleaning brush facilitate automatic cleaning. At the same time, the cleaning brush can be stored on one side of the side wall of the fixed mold core without affecting the movement of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an exploded view of an embodiment of the present application.

[0014] Figure 2 It is a structural diagram of one side of the cleaning mechanism in an embodiment of the present application.

[0015] Figure 3 It is a front cross-sectional view of an embodiment of the present application.

[0016] Figure 4 It is a top sectional view of an embodiment of the present application.

[0017] Figure 5 It is a structural diagram of one side of the ejection mechanism in an embodiment of the present application.

[0018] Explanation of the accompanying symbols: 1. Injection molding machine gate; 2. Fixed mold core; 3. Moving mold core; 4. Injection molded part; 5. Ejection mechanism; 6. Pulley; 7. Drive belt; 8. First motor bracket; 9. Motor No. 1; 10. First bevel gear; 11. Second bevel gear; 12. Drive shaft; 13. First bearing seat; 14. Second bearing seat; 15. Second motor bracket; 16. Motor No. 2; 17. Cleaning brush; 201. First injection molding runner; 202. Lower mold body; 301. Second injection molding runner; 302. Upper mold body; 501. Ejector pin; 502. Hose; 503. Pump; 504. Release agent storage box. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-5 This application is described in further detail.

[0020] The present application discloses an injection mold gate structure, referring to Figure 1-5, an injection mold gate structure, including an injection molding machine gate 1, the outer wall of the injection molding machine gate 1 is provided with a fixed mold core 2, a movable mold core 3 is provided above the fixed mold core 2, the inner wall of the movable mold core 3 is provided with a groove adapted to the injection molded part 4, the inner wall of the fixed mold core 2 is provided with a groove adapted to the injection molded part 4, the inner wall of the fixed mold core 2 is movably connected with an ejection mechanism 5 that can spray a release agent, and the periphery of the fixed mold core 2 is provided with a cleaning mechanism that can clean the residues generated after injection molding; the cleaning mechanism includes a pulley 6, a transmission belt 7, a first motor bracket 8, a No. 1 motor 9, a first bevel gear 10, a second bevel gear 11, a transmission shaft 12, a first bearing seat 13, a second bearing seat 14, and a second motor bracket 1 5. No. 2 motor 16, cleaning brush 17, both sides of the fixed mold core 2 are connected with the first bearing seat 13 by screws, the outer wall of the fixed mold core 2 is provided with a bearing mounting hole, the transmission shaft 12 is rotatably connected to the inner wall of the first bearing seat 13 through the bearing, the pulley 6 is arranged on the outer wall of the transmission shaft 12, the transmission belt 7 is connected to the outer wall of the pulley 6, the second bevel gear 11 is arranged on the outer wall of the transmission shaft 12, the outer wall of the fixed mold core 2 is fixedly connected to the first motor bracket 8, the No. 1 motor 9 is fixedly connected to the inner wall of the first motor bracket 8, the output end of the No. 1 motor 9 is fixedly connected to the inner wall of the first bevel gear 10, the first bevel gear 10 is meshed with the second bevel gear 11, and the second bearing seat 14 is fixed The cleaning brush 17 is fixedly connected to the outer wall of the transmission belt 7, and is rotatably connected to the inner wall of the second bearing seat 14 through a bearing. The second motor bracket 15 is fixedly connected to the outer wall of one of the first bearing seats 13, and the No. 2 motor 16 is fixedly connected to the inner wall of the second motor bracket 15. One end of the cleaning brush 17 is fixedly connected to the output end of the No. 2 motor 16. The injection molding machine gate 1 is in the shape of a circular tube, and the lower end of the injection molding machine gate 1 is connected to the injection molding machine. The inner wall of the fixed mold core 2 is provided with a circular hole, and the ejection mechanism 5 is movably connected to the inner wall of the circular hole of the fixed mold core 2. The movable mold core 3 includes a second injection runner 301 and an upper mold body 302. The second injection runner 301 is opened below the upper mold body 302, and the second injection runner The channel 301 includes a concave U-shaped flow channel and a concave plastic part flow channel. The output end of the concave U-shaped flow channel is connected to the side wall of the concave plastic part flow channel. The fixed mold core 2 includes a first injection flow channel 201 and a lower mold body 202. The first injection flow channel 201 is opened above the lower mold body 202. A circular hole is opened on the inner wall of the lower mold body 202. The injection molding machine gate 1 is movably connected in the circular hole, and the circular hole is connected to the first injection flow channel 201. The first injection flow channel 201 includes a convex U-shaped flow channel and a convex plastic part flow channel. The output end of the convex U-shaped flow channel is connected to the side wall of the convex plastic part flow channel. The cleaning brush 17 is made of a center rod and a nylon brush. The nylon material is soft and will not easily damage the surface of the first injection flow channel.

[0021] Reference Figure 5The ejection mechanism 5 includes a pin 501, a hose 502, a pump 503, and a release agent storage tank 504. The pin 501 is slidably connected to the inner wall of the fixed mold core 2. The inner wall of the pin 501 is provided with a cavity. One end of the hose 502 is fixedly connected to the inner wall of the pin 501. The output end of the pump 503 is fixedly connected to the hose 502. The input end of the pump 503 is connected to the release agent storage tank 504. The pump 503 is connected to an external power supply. A small hole is provided at the upper end of the pin 501, and the release agent input into the pin 501 can be sprayed out by applying pressure to the hose 502 by the pump 503. The release agent storage tank 504 is provided with an oily release agent. The oily release agent can be silicone oil. The use of silicone oil can form a uniform lubricating film on the mold surface, which greatly reduces the friction between the product and the mold, ensures that the product can be smoothly ejected from the mold, reduces the resistance during demoulding, and reduces the risk of defects such as deformation and strain of the product due to difficulty in demoulding.

[0022] The implementation principle of the injection mold gate structure of the embodiment of the present application is as follows: when in use, the injection molding machine injects the molten plastic into the injection molding machine gate 1, and then injects it into the first injection molding runner 201 and the second injection molding runner 301. Since the gate is on the side wall of the injection molded part 4, the gate can be separated at the same time when the lower mold body 202 and the upper mold body 302 are separated. Then, the injection molding machine gate 1 and the ejection mechanism 5 are pushed toward the injection molded part 4 through the ejection mechanism, and then the injection molded part 4 is ejected from the movable mold core 3 and the fixed mold core 2. Then, the release agent inside the release agent storage box 504 is sucked into the inner wall of the ejector pin 501 through the pump 503, and then atomized through the small hole at the upper end of the ejector pin 501 and sprayed to the second The injection molding runner 301 and the inner wall of the first injection molding runner 201 are cleaned to facilitate the next demoulding; when cleaning is required after multiple injection moldings are completed, the first bevel gear 10 is driven to rotate by the No. 1 motor 9, and then the second bevel gear 11 is used to transmit and drive the transmission shaft 12 and the pulley 6 to rotate, thereby driving the transmission belt 7 to move. At this time, the second bearing seat 14 set on the side is moved to the top of the lower mold body 202, and then the cleaning brush 17 is driven to rotate at high speed by the No. 2 motor 16. At this time, the position of the cleaning brush 17 on the surface of the fixed mold core 2 is controlled by the movement of the transmission belt 7, so that the cleaning brush 17 repeatedly cleans the plastic residues on the surface of the lower mold body 202 and the first injection molding runner 201.

[0023] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0024] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0025] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0026] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An injection mold gate structure, characterized in that: The invention comprises an injection molding machine gate (1), wherein the outer wall of the injection molding machine gate (1) is provided with a fixed mold core (2), a movable mold core (3) is provided above the fixed mold core (2), the inner wall of the movable mold core (3) is provided with a groove adapted to the injection molded part (4), the inner wall of the fixed mold core (2) is provided with a groove adapted to the injection molded part (4), the inner wall of the fixed mold core (2) is movably connected to an ejection mechanism (5) capable of spraying a release agent, and the periphery of the fixed mold core (2) is provided with a cleaning mechanism capable of cleaning residues generated after injection molding; The cleaning mechanism comprises a pulley (6), a transmission belt (7), a first motor bracket (8), a No. 1 motor (9), a first bevel gear (10), a second bevel gear (11), a transmission shaft (12), a first bearing seat (13), a second bearing seat (14), a second motor bracket (15), a No. 2 motor (16), and a cleaning brush (17). The two sides of the fixed mold core (2) are connected to the first bearing seat (13) by screws. The outer wall of the fixed mold core (2) is provided with a bearing mounting hole. The transmission shaft (12) is rotatably connected to the inner wall of the first bearing seat (13) through a bearing. The pulley (6) is arranged around the outer wall of the transmission shaft (12). The transmission belt (7) is transmission-connected to the outer wall of the pulley (6). The second bevel gear (11) is arranged around the transmission shaft (12). The outer wall of the fixed mold core (2) is fixedly connected to a first motor bracket (8), the No. 1 motor (9) is fixedly connected to the inner wall of the first motor bracket (8), the output end of the No. 1 motor (9) is fixedly connected to the inner wall of the first bevel gear (10), the first bevel gear (10) is meshed with the second bevel gear (11), the second bearing seat (14) is fixedly connected to the outer wall of the transmission belt (7), the cleaning brush (17) is rotatably connected to the inner wall of the second bearing seat (14) through a bearing, the second motor bracket (15) is fixedly connected to the outer wall of one of the first bearing seats (13), the No. 2 motor (16) is fixedly connected to the inner wall of the second motor bracket (15), and one end of the cleaning brush (17) is fixedly connected to the output end of the No. 2 motor (16).

2. The injection mold gate structure according to claim 1, characterized in that: The injection molding machine gate (1) is in the shape of a circular tube, the lower end of the injection molding machine gate (1) is connected to the injection molding machine, the inner wall of the fixed mold core (2) is provided with a circular hole, and the ejection mechanism (5) is movably connected to the inner wall of the circular hole of the fixed mold core (2).

3. The injection mold gate structure according to claim 1, characterized in that: The ejection mechanism (5) comprises a ejector pin (501), a hose (502), a pump (503), and a release agent storage tank (504); the ejector pin (501) is slidably connected to the inner wall of the fixed mold core (2); the inner wall of the ejector pin (501) is provided with a cavity; one end of the hose (502) is fixedly connected to the inner wall of the ejector pin (501); the output end of the pump (503) is fixedly connected to the hose (502); and the input end of the pump (503) is connected to the release agent storage tank (504).

4. The injection mold gate structure according to claim 3, characterized in that: The release agent storage box (504) is provided with an oily release agent inside.

5. The injection mold gate structure according to claim 1, characterized in that: The movable mold core (3) comprises a second injection molding flow channel (301) and an upper mold body (302). The second injection molding flow channel (301) is opened below the upper mold body (302). The second injection molding flow channel (301) comprises a concave U-shaped flow channel and a concave plastic part flow channel. The output end of the concave U-shaped flow channel is connected to the side wall of the concave plastic part flow channel.

6. The injection mold gate structure according to claim 1, characterized in that: The fixed mold core (2) includes a first injection molding flow channel (201) and a lower mold body (202). The first injection molding flow channel (201) is opened above the lower mold body (202). The inner wall of the lower mold body (202) is provided with a circular hole. The injection molding machine gate (1) is movably connected in the circular hole. The circular hole is connected to the first injection molding flow channel (201). The first injection molding flow channel (201) includes a convex U-shaped flow channel and a convex plastic part flow channel. The output end of the convex U-shaped flow channel is connected to the side wall of the convex plastic part flow channel.

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