Injection mold with good product quality

Abstract

This utility model discloses an injection mold for producing high-quality products, comprising a lower mold, side molds, and an upper mold. The lower mold includes a base frame, a lower module, and a lower mold core. The lower module is located on top of the base frame. The lower mold core is located on top of the lower module. A runner is provided on the top of the lower mold core. Each of the four sides of the lower mold core has a plurality of injection ports evenly spaced on its top. The injection ports are connected to the runners via a bottom runner. The bottom runner is located inside the lower mold core. The side mold includes a movable seat and a side mold core. The movable seat is slidably located on top of the lower module. A guide hole inclined from top to bottom outwards is provided on the movable seat. The side mold core is located on one side of the movable seat and is located on the outer side of the four sides of the lower mold core. The upper mold includes a top frame, an upper module, and an upper mold core. An injection port is provided on the top frame. The upper module is located at the bottom of the top frame. A guide post corresponding to the guide hole is provided at the bottom of the upper module. The upper mold core is located at the bottom of the upper module.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to an injection mold with high product quality. Background Technology

[0002] Injection molds are tools used to produce plastic products, and they also give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and then obtaining the molded product after cooling and solidification.

[0003] Existing injection molds typically use a single injection port to directly inject raw materials into the mold cavity for molding. When the product has a rectangular frame or similar structure, unevenness in the injection molding process can easily occur in certain areas. Furthermore, when there is only one injection port, the sprue formed between the injection port and the mold cavity is relatively large. During demolding, the sprue fracture surface is large, which can easily have an adverse effect on the product itself. Moreover, the subsequent processing of a large sprue cross-section is also quite troublesome. Utility Model Content

[0004] This invention provides an injection mold with high product quality to solve the above-mentioned technical problems.

[0005] The solution adopted by this utility model to achieve its technical effect is as follows:

[0006] A high-quality injection mold includes a lower mold, side molds, and an upper mold. The lower mold includes a base frame, a lower module, and a lower mold core. The lower module is located on top of the base frame. The lower mold core is located on top of the lower module. A runner is provided on the top of the lower mold core. Each of the four sides of the lower mold core has a plurality of injection ports evenly spaced on its top. The injection ports communicate with the runners via a bottom runner. The bottom runner is located inside the lower mold core. The side mold includes a movable base and a side mold core. The movable base is slidably mounted on top of the lower module. The movable base has guide holes that slope outwards from top to bottom. The side mold core is disposed on one side of the movable seat, and the side mold core is located on the outer side of the four sides of the lower mold core; the upper mold includes a top frame, an upper module, and an upper mold core; the top frame is provided with an injection port; the upper module is disposed at the bottom of the top frame; the bottom of the upper module is provided with a guide post corresponding to the guide hole; the upper mold core is disposed at the bottom of the upper module; the upper module is pressed against the top of the lower module, so that the guide post is slidably inserted into the guide hole, so that the upper mold core, the lower mold core, and the side mold core are closed to form a mold cavity; the mold cavity is connected to the injection port; the runner is connected to the injection port.

[0007] Preferably, the lower module has a movable groove at its top; the movable seat is slidably disposed on the bottom wall of the movable groove; the movable seat has a guide slope that slopes outward from top to bottom on its side; the upper module has a clamping block at its bottom; and the clamping block is slidably inserted between the guide slope and the inner side wall of the movable groove.

[0008] Preferably, a pressure-relieving return spring is provided between the movable seat and the lower mold core.

[0009] Preferably, a heat exchange tube is provided inside the side mold core; an air inlet is provided on one side of the movable seat, which communicates with the heat exchange tube; and a sliding interface is provided on one side of the lower module, which faces the air inlet.

[0010] Preferably, the top of the lower mold core is provided with a mounting groove; a molding head is installed in the mounting groove by screws; the bottom runner is provided in the molding head; the injection port is provided on the top of the molding head; the molding head is composed of two semi-molding heads spliced ​​together; one half of the bottom runner is provided on the inner side of one of the semi-molding heads; one half of the injection port is provided on the top inner side of one of the semi-molding heads.

[0011] Preferably, the top of the lower mold core is provided with an annular flow channel; the annular flow channel is connected to the branch flow channel.

[0012] Preferably, a first demolding rod is provided on the base frame; the top of the first demolding rod passes through the lower mold core and is located on the bottom surface of the mold cavity.

[0013] Preferably, a second demolding rod is provided on the base frame; the top of the second demolding rod passes through the lower mold core and is located on the bottom surface of the annular flow channel.

[0014] Preferably, the upper module is provided with a plurality of flow dividers; the top inlet of the flow divider is connected to the injection port; the bottom outlet of the flow divider extends out from the bottom surface of the upper mold core; and the bottom outlet of the flow divider is connected to the flow channel.

[0015] Preferably, the upper module is provided with a distribution box; the distribution box is connected to the injection port; the top of the distribution pipe is connected to the bottom of the distribution box; the upper module is provided with a hot water pipe; the hot water pipe is located around the distribution box.

[0016] The beneficial effects of this invention are as follows: The injection material entering through the injection port passes through the runner and bottom runner before exiting through the injection port and entering the mold cavity for molding. When the upper and lower molds are demolded, the bottom of the upper mold only forms a sprue between the bottom of the upper mold and the runner of the mold core. The pulling force after the upper mold detaches is mostly applied to the sprue between the upper mold and the runner, causing it to break, thus preventing damage to the product molded in the mold cavity. Even if too much material is injected, the excess material can overflow into the bottom runner and runner, allowing for saturated injection and ensuring uniform and high-quality product molding. The top of each of the four sides of the lower mold core is evenly spaced with several injection ports. Multi-point injection further ensures that the injected material is evenly distributed in all parts of the mold cavity, ensuring that the product is molded in a uniform and high-quality manner. At the same time, multiple injection ports can minimize the size of the injection ports, resulting in very small sprues between the product molding and the solidified material in each injection port. This makes product demolding easier, and the sprue fracture surface is also very small, making subsequent processing easier. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall mold disclosed in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the upper mold disclosed in an embodiment of the present utility model;

[0019] Figure 3 This is a side view of an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the lower mold core disclosed in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the demolding rod disclosed in an embodiment of the present utility model;

[0022] Figure 6 This is an exploded view of the molding head disclosed in an embodiment of this utility model.

[0023] Labeling instructions: 1-Base frame, 2-Lower module, 3-Lower mold core, 4-Runner, 5-Injection port, 6-Moving seat, 7-Side mold core, 8-Top frame, 9-Upper module, 10-Upper mold core, 11-Injection port, 12-Guide post, 13-Clamping block, 14-Relief spring, 15-Heat exchange pipe, 16-Air inlet, 17-Sliding interface, 18-Molding head, 19-First demolding rod, 20-Second demolding rod, 21-Runner pipe, 22-Runner box, 23-Hot water pipe, 24-Annular runner. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may have an intervening element present. When an element is referred to as being "fixedly connected to" another element, it can be a common fixing connection method such as welding, bolting, or gluing.

[0025] Please refer to Figure 1-6 This utility model discloses a high-quality injection mold, comprising a lower mold, side molds, and an upper mold. The lower mold includes a base frame 1, a lower module 2, and a lower mold core 3. The lower module 2 is disposed on the top of the base frame 1. The lower mold core 3 is disposed on the top of the lower module 2. A runner 4 is provided on the top of the lower mold core 3. Each of the four sides of the lower mold core 3 has a plurality of injection ports 5 evenly spaced on its top. The injection ports 5 are connected to the runner 4 through a bottom runner. The bottom runner is disposed inside the lower mold core 4. The side mold includes a movable seat 6 and a side mold core 7. The movable seat 6 is slidably disposed on the top of the lower module 2. The movable seat 6 is provided with guide holes that slope outward from top to bottom. The side mold core 7 is disposed on one side of the movable seat 6, and the side mold core 7 is located on the outer side of the four sides of the lower mold core 3; the upper mold includes a top frame 8, an upper module 9, and an upper mold core 10; the top frame 8 is provided with an injection port 11; the upper module 9 is disposed at the bottom of the top frame 8; the bottom of the upper module 9 is provided with a guide post 12 corresponding to the guide hole; the upper mold core 10 is disposed at the bottom of the upper module 9; the upper module 9 is pressed against the top of the lower module 2, so that the guide post 12 is slidably inserted into the guide hole, so that the upper mold core 10, the lower mold core 3, and the side mold core 7 are closed to form a mold cavity; the mold cavity is connected to the injection port 5; the branch channel 4 is connected to the injection port 11.

[0026] Specifically, the lower module 2 has a moving groove at its top; the moving seat 6 is slidably disposed on the bottom wall of the moving groove; the side of the moving seat 6 is provided with a guide slope that slopes outward from top to bottom; the bottom of the upper module 9 is provided with a clamping block 13; the clamping block 13 is slidably inserted between the guide slope and the inner side wall of the moving groove. When the side mold core 7 participates in mold closing, the clamping block 13 firmly clamps the moving seat 6 and the side mold core 7 on one side to prevent loosening during the injection molding process, which would affect the product quality.

[0027] Specifically, a pressure-relieving and resetting spring 14 is provided between the movable seat 6 and the lower mold core 3, which, together with the clamping block 13, elastically and firmly presses the movable seat 6 and the side mold core 7 together.

[0028] Specifically, a heat exchange pipe 15 is provided inside the side mold core 7; a gas inlet 16 communicating with the heat exchange pipe 15 is provided on one side of the movable seat 6; and a sliding interface 17 facing the gas inlet 16 is provided on one side of the lower module 2. A pipe joint for supplying hot air from the outside passes through the sliding interface 17 and is connected to the gas inlet. The heat exchange pipe 15 is adjacent to the flow channel 4. After the injection molding material enters the flow channel 4, hot air is supplied into the heat exchange pipe 15 to maintain the temperature of the flow channel 4 environment and prevent the injection molding material from solidifying before entering the mold cavity.

[0029] Specifically, the lower mold core 4 has a mounting groove on its top; a molding head 18 is installed in the mounting groove by screws; the bottom runner is located inside the molding head 18; and the injection port 5 is located on the top of the molding head 18. The molding head 18 is composed of two semi-molding heads joined together; one half of the bottom runner is located inside one of the semi-molding heads; and one half of the injection port is located inside the top of one of the semi-molding heads. To clean up residue, simply unscrew the screws and remove the molding head 18. Removing the molding head 18 naturally separates it into two semi-molding heads, facilitating the cleaning of the exposed bottom runner and injection port 5.

[0030] Specifically, the top of the lower mold core 3 is provided with an annular flow channel 24; the annular flow channel 24 is connected to the branch flow channel 4, and the excess injection molding material overflowing from the mold cavity will enter the annular flow channel 24 after filling the bottom flow channel and the branch flow channel 4. The base frame 1 is provided with a second demolding rod 20; the top of the second demolding rod 20 passes through the lower mold core 3 and is located on the bottom surface of the branch flow channel 4. During demolding, the second demolding rod 20 lifts up to separate the defective products and auxiliary products formed on the annular flow channel 24 from the lower mold core 3.

[0031] Specifically, the base frame 1 is provided with a first demolding rod 19; the top of the first demolding rod 19 passes through the lower mold core 3 and is located on the bottom surface of the mold cavity. During demolding, the product is lifted by the first demolding rod 19 and separated from the lower mold core 3.

[0032] Specifically, the upper module 2 is provided with a plurality of flow dividers 21; the top inlet of the flow divider 21 is connected to the injection port 11; the bottom outlet of the flow divider 21 extends out from the bottom surface of the upper mold core 10; and the bottom outlet of the flow divider 21 is connected to the flow channel 4.

[0033] Specifically, the upper module 2 is provided with a diversion box 22; the diversion box 22 is connected to the injection port 11; the top of the diversion pipe 21 is connected to the bottom of the diversion box 22; the upper module 2 is provided with a hot water pipe 23; the hot water pipe 23 is located around the diversion box 22.

[0034] As can be seen from the above description, the injection-molded product of this utility model uses uniform materials in all parts and has good product quality.

[0035] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. It should be noted that the protection scope of the present utility model includes, but is not limited to, the above embodiments; the specific structures disclosed in the accompanying drawings are only preferred embodiments of the present utility model. Those skilled in the art can develop other embodiments based on this. Any simple modifications or equivalent substitutions that do not depart from the innovative concept of the present utility model are all covered by the present utility model and fall within the protection scope of the present utility model.

Claims

1. An injection mold for producing high-quality products, characterized in that, include: The lower mold includes a base frame, a lower module, and a lower mold core. The lower module is located on top of the base frame. The lower mold core is located on top of the lower module. A flow channel is provided on the top of the lower mold core. Each of the four sides of the lower mold core has several injection ports evenly spaced on its top. The injection ports are connected to the flow channel through a bottom flow channel. The bottom flow channel is located inside the lower mold core. Side mold; the side mold includes a movable base and a side mold core; the movable base is slidably disposed on the top of the lower module; the movable base is provided with guide holes that slope outward from top to bottom; the side mold core is disposed on one side of the movable base, and the side mold core is located on the outer side of the four sides of the lower mold core; The upper mold includes a top frame, an upper module, and an upper mold core; the top frame is provided with an injection port; the upper module is located at the bottom of the top frame; the bottom of the upper module is provided with a guide post corresponding to the guide hole; the upper mold core is located at the bottom of the upper module. The upper module is pressed onto the top of the lower module, so that the guide post is slidably inserted into the guide hole, and the upper mold core, the lower mold core, and the side mold core are closed to form a mold cavity; the mold cavity is connected to the injection port; the runner is connected to the injection port.

2. The injection mold for producing high-quality products according to claim 1, characterized in that: The lower module has a movable groove at its top; the movable seat is slidably disposed on the bottom wall of the movable groove; the movable seat has a guide slope that slopes outward from top to bottom on its side; the upper module has a clamping block at its bottom; the clamping block is slidably inserted between the guide slope and the inner side wall of the movable groove.

3. The injection mold for producing high-quality products according to claim 2, characterized in that: A pressure-relieving return spring is provided between the movable seat and the lower mold core.

4. The injection mold for producing high-quality products according to claim 1, characterized in that: A heat exchange tube is provided inside the side mold core; an air inlet is provided on one side of the movable base, which communicates with the heat exchange tube; and a sliding interface is provided on one side of the lower module, which faces the air inlet.

5. The injection mold for producing high-quality products according to claim 1, characterized in that: The lower mold core has a mounting groove at its top; a molding head is installed in the mounting groove by screws; the bottom runner is located inside the molding head; the injection port is located at the top of the molding head; the molding head is composed of two semi-molding heads joined together; one half of the bottom runner is located inside one of the semi-molding heads; one half of the injection port is located inside the top of one of the semi-molding heads.

6. The injection mold for producing high-quality products according to claim 1, characterized in that: The top of the lower mold core is provided with an annular flow channel; the annular flow channel is connected to the branch flow channel.

7. The injection mold for producing high-quality products according to claim 1, characterized in that: The base frame is provided with a first demolding rod; the top of the first demolding rod passes through the lower mold core and is located on the bottom surface of the mold cavity.

8. The injection mold for producing high-quality products according to claim 6, characterized in that: A second demolding rod is provided on the base frame; the top of the second demolding rod passes through the lower mold core and is located on the bottom surface of the annular flow channel.

9. The injection mold for producing high-quality products according to claim 1, characterized in that: The upper module is provided with several manifolds; the top inlet of the manifold is connected to the injection port; the bottom outlet of the manifold extends out from the bottom surface of the upper mold core; the bottom outlet of the manifold is connected to the manifold channel.

10. The injection mold for high-quality products according to claim 9, characterized in that: The upper module is equipped with a distribution box; the distribution box is connected to the injection port; the top of the distribution pipe is connected to the bottom of the distribution box; the upper module is equipped with a hot water pipe; the hot water pipe is located around the distribution box.

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