Injection mold with buffer

By introducing a buffer design of springs and damping plates into the injection mold, the problems of wear and deformation in traditional molds during mold closing and injection are solved, thereby improving the durability of the mold and production efficiency.

CN224675407UActive Publication Date: 2026-08-25DONGGUAN CHANGRUN PLASTIC MOULD TECH CO LTD
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Patent Information

Application Number
CN202521798548.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2026-08-25
Estimated Expiration
2035-08-22

AI Technical Summary

Technical Problem

Traditional injection molds have rigid contact during mold closing, which leads to wear and deformation of the contact surface. Over time, this results in gaps and cracks, reducing the lifespan of the mold.

Method used

The injection mold with cushioning uses a combination of springs and damping plates to provide elastic cushioning during mold closing and injection stages, reducing rigid collisions and molten material impacts, and improving mold life and production efficiency.

Benefits of technology

It effectively reduces mold wear and cracks, extends mold life, and improves production efficiency. It is especially suitable for uniform filling and pressure stabilization of complex cavities and large plastic parts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to injection mold technical field, concretely is a kind of injection mold with buffer, including two main parts, the side of main part is provided with connecting assembly, the connecting assembly includes butt joint block one, auxiliary injection hole, fixed strip, movable rod, clamping rod, spring one, two the butt joint block one is fixedly connected in the side of main part opposite, the inside of butt joint block one is equipped with auxiliary injection hole, the side of main part opposite is fixedly connected with fixed strip, the side of fixed strip is movably connected with two movable rods.This kind of injection mold with buffer, by adding connecting assembly, it is converted into elastic deformation by the double elastic buffer of spring one and spring two in clamping stage, reduce the abrasion of butt joint block, clamping structure and template, improve service life, auxiliary injection hole auxiliary feeding is matched with main injection hole, realize melt shunt, avoid single direction pressure concentration, especially suitable for the uniform filling of complex cavity or large plastic parts.
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Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with cushioning. Background Technology

[0002] In the injection molding industry, traditional injection molds are the core equipment for plastic parts production. Their structural design and performance directly affect product quality, production efficiency and mold life. However, in the long-term use of traditional molds, a series of technical pain points have gradually been exposed, becoming key factors restricting precision manufacturing and efficient production.

[0003] In current injection molds, the contact during mold closing is generally rigid. The contact surfaces are prone to wear and deformation. Long-term use can lead to gaps and cracks in the mold, reducing its service life. Utility Model Content

[0004] The purpose of this invention is to provide a cushioned injection mold to solve the problem mentioned in the background art that when the mold is closed, the contact surface is generally rigid, which is prone to wear and deformation. Long-term use will lead to gaps and cracks in the mold, reducing the service life of the mold. To achieve the above objectives, this utility model provides the following technical solution: A buffered injection mold includes two main bodies. A connecting assembly is provided on one side of each main body. The connecting assembly includes a first docking block, a secondary injection hole, a fixing strip, a movable rod, a snap-fit ​​rod, and a first spring. An injection assembly is provided on the top of the second docking block. The injection assembly includes a main injection hole, a limiting ring, a movable tube, a movable disc, a rubber pad, and a damping plate. Both first docking blocks are fixedly connected to opposite sides of the main bodies. A secondary injection hole is provided inside each first docking block. A fixing strip is fixedly connected to opposite sides of each main body. Two movable rods are movably connected to one side of each fixing strip. The movable rods are movably sleeved with the first docking blocks. The connecting assembly also includes a snap-fit ​​rod, which is fixedly connected to the other end of the movable rod. A first spring is movably connected to the side surface of the movable rod. On opposite sides of the mold, a second docking block is fixedly connected. The second docking block is adapted to the first docking block. A connecting groove is opened on one side of the second docking block. A sealing gasket is fixedly connected inside the connecting groove. Two insertion holes are opened on one side of the connecting groove. Two telescopic rods are fixedly connected inside the insertion holes. A second spring is movably connected to the side surface of the telescopic rod. A snap-fit ​​block is fixedly connected to the other end of the telescopic rod. The snap-fit ​​block is adapted to the snap-fit ​​rod. This type of injection mold with buffer, by adding connecting components, transforms rigid collision into elastic deformation through the double elastic buffer of spring one and spring two during the mold closing stage, reducing the wear of the docking block, snap-fit ​​structure and mold plate, and improving service life. The auxiliary injection hole assists in feeding and cooperates with the main injection hole to realize the diversion of melt flow and avoid pressure concentration in one direction. It is especially suitable for uniform filling of complex cavities or large plastic parts.

[0005] More preferably, the injection component further includes a groove, which is formed on one side of the main body. The groove has a main injection hole inside and a movable disc is movably connected inside the groove. This type of injection mold with buffer, by adding the injection component, allows the spring and damping plate to work together to buffer during the injection stage, reducing the impact of the molten material on the main runner and cavity inlet, avoiding cracking or wear of the inlet, and reducing the frequency of mold maintenance.

[0006] More preferably, one side of the movable disc is fixedly connected to a movable tube, one side of the main body is fixedly connected to a limit ring, and the movable tube is movably sleeved with the main injection hole.

[0007] More preferably, a spring is movably connected to the side surface of the movable tube, a damping plate is fixedly connected to the side surface of the movable tube, and a rubber pad is fixedly connected to one side of the movable disc.

[0008] More preferably, a plurality of insertion holes are provided at each of the four corners on one side of the main body, a U-shaped groove is provided on one side of the main body, insertion rods are fixedly connected at each of the four corners on one side of the main body, and a U-shaped block is fixedly connected to one side of the main body.

[0009] More preferably, a plurality of pneumatic grooves are provided on one inner wall of the main body, and a pneumatic push rod is movably connected inside the pneumatic grooves. An air inlet is fixedly connected to one side of the main body.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In this invention, the injection mold with buffer, by adding connecting components, transforms rigid collision into elastic deformation through the double elastic buffer of spring one and spring two during the mold closing stage, reducing wear on the mating block, snap-fit ​​structure and template, and improving service life. The auxiliary injection hole assists in feeding and cooperates with the main injection hole to achieve melt diversion and avoid pressure concentration in one direction, which is especially suitable for uniform filling of complex cavities or large plastic parts.

[0012] In this invention, the injection mold with buffer, by adding an injection component, uses spring three and damping plate to buffer the molten material during the injection stage, reducing the impact of the molten material on the main runner and cavity inlet, avoiding cracking or wear of the inlet, and reducing the frequency of mold maintenance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of a partial structure of the present invention. Figure 1 ;

[0015] Figure 3 This is a schematic diagram of a partial structure of the present invention. Figure 2 ;

[0016] Figure 4 This is a schematic diagram of a partial structure of the present invention. Figure 3 ;

[0017] Figure 5 This is a schematic diagram of the disassembled structure of this utility model;

[0018] Figure 6 This is a schematic diagram of a partial structure of the present invention. Figure 4 .

[0019] In the diagram: 1. Main body; 2. Connecting assembly; 201. Docking block one; 202. Secondary injection hole; 203. Fixing strip; 204. Movable rod; 205. Snap-fit ​​rod; 206. Spring one; 207. Docking block two; 208. Connecting groove; 209. Sealing gasket; 210. Insertion hole one; 211. Telescopic rod; 212. Spring two; 213. Snap-fit ​​block; 3. Injection assembly; 301. Groove; 302. Main injection hole; 303. Limiting ring; 304. Movable tube; 305. Movable disc; 306. Rubber pad; 307. Spring three; 308. Damping plate; 4. Insertion hole two; 5. U-shaped groove; 6. Insertion rod; 7. U-shaped block; 8. Pneumatic groove; 9. Pneumatic push rod; 10. Air inlet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 - Figure 6A buffered injection mold includes two main bodies 1. A connecting assembly 2 is provided on one side of the main body 1. The connecting assembly 2 includes a first docking block 201, a secondary injection hole 202, a fixing strip 203, a movable rod 204, a locking rod 205, and a first spring 206. An injection assembly 3 is provided on the top of the second docking block 207. The injection assembly 3 includes a main injection hole 302, a limiting ring 303, a movable tube 304, a movable plate 305, a rubber pad 306, and a damping plate 308. The two first docking blocks 201 are fixedly connected to opposite sides of the main body 1. The internal part of the main body 1 has a secondary injection hole 202. A fixing strip 203 is fixedly connected to one side of the main body 1. Two movable rods 204 are movably connected to one side of the fixing strip 203. The movable rods 204 are movably sleeved with the first docking block 201. The connecting assembly 2 also includes a snap-fit ​​rod 205, which is fixedly connected to the other end of the movable rod 204. A spring 206 is movably connected to the side surface of the movable rod 204. A second docking block 207 is fixedly connected to one side of the main body 1. The second docking block 207 is adapted to the first docking block 201. A connecting groove 208 is provided on one side, and a sealing gasket 209 is fixedly connected inside the connecting groove 208. Two insertion holes 210 are provided on one side of the connecting groove 208, and two telescopic rods 211 are fixedly connected inside the insertion holes 210. A spring 212 is movably connected to the side surface of the telescopic rod 211. A snap-fit ​​block 213 is fixedly connected to the other end of the telescopic rod 211. The snap-fit ​​block 213 is adapted to the snap-fit ​​rod 205. When the mold is closed, the two main bodies 1 are first docked through the precise positioning structure. The insertion rod 6 on one side of the main body is inserted into the insertion hole 4 of the other main body, and the U-shaped block 7 is embedded. U-shaped groove 5 ensures the alignment accuracy of the upper and lower, left and right main bodies of the mold. The first docking block 201 is inserted into the connecting groove 208 of the second docking block 207. The snap-fit ​​rod 205 contacts and squeezes the snap-fit ​​block 213 in the connecting groove, pushing the telescopic rod 211 to retract. The second spring 212 is compressed and stores energy. At the same time, the movable rod 204 slides along the fixed bar 203, and the first spring 206 is compressed synchronously. The elastic deformation of the second spring 212 and the first spring 206 absorbs the impact force of mold closing, realizing soft docking and avoiding rigid collision. During this stage, the sealing gasket 209 fits tightly with the docking, forming a sealed environment in advance.

[0022] In this embodiment, as Figure 2 and Figure 3As shown, the injection component 3 also includes a groove 301, which is located on one side of the main body 1. A main injection hole 302 is provided inside the groove 301, and a movable disk 305 is movably connected inside the groove 301. The main channel molten material flows in from the main injection hole 302, pushing the movable tube 304 to move the movable disk 305. The spring 307 is compressed to generate a reverse elastic force, and at the same time, the damping plate 308 rubs against the inner wall of the mold to form a damping resistance. The two work together to reduce the impact speed of the molten material. Some of the molten material is fed through the auxiliary injection hole 202 to avoid pressure concentration at a single inlet. During the pressure holding stage, the elastic restoring force of the spring 307 and the continuous damping effect of the damping plate 308 can absorb the peak value of the molten material pressure fluctuation. Combined with the flexible sealing of the rubber pad 306, it ensures that the cavity pressure is uniform and stable, reducing product defects caused by sudden pressure changes.

[0023] In this embodiment, as Figure 2 and Figure 3 As shown, a movable tube 304 is fixedly connected to one side of the movable disc 305, and a limit ring 303 is fixedly connected to one side of the main body 1. The movable tube 304 is movably connected to the main injection hole 302.

[0024] In this embodiment, as Figure 2 and Figure 3 As shown, a spring 307 is movably connected to the side surface of the movable tube 304, a damping plate 308 is fixedly connected to the side surface of the movable tube 304, and a rubber pad 306 is fixedly connected to one side of the movable disc 305.

[0025] In this embodiment, as Figure 2 and Figure 5 As shown, several insertion holes 4 are provided at the four corners of one side of the main body 1, a U-shaped groove 5 is provided on one side of the main body 1, insertion rods 6 are fixedly connected to the four corners of one side of the main body 1, and a U-shaped block 7 is fixedly connected to one side of the main body 1.

[0026] In this embodiment, as Figure 1 and Figure 6 As shown, a number of pneumatic grooves 8 are provided on one inner wall of the main body 1, and a pneumatic push rod 9 is movably connected inside the pneumatic groove 8. An air inlet 10 is fixedly connected to one side of the main body 1.

[0027] The method of use and advantages of this utility model: The working process of this type of injection mold with cushioning is as follows:

[0028] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, during mold closing, the two main bodies 1 are first aligned through a precise positioning structure. The insert rod 6 on one side of the main body is inserted into the insert hole 4 of the other main body, and the U-shaped block 7 is embedded in the U-shaped groove 5 to ensure the alignment accuracy of the upper and lower, left and right main bodies of the mold. The first docking block 201 is inserted into the connecting groove 208 of the second docking block 207. The snap-fit ​​rod 205 contacts and presses against the snap-fit ​​block 213 in the connecting groove, pushing the telescopic rod 211 to retract. The second spring 212 is compressed and stores energy. At the same time, the movable rod 204 slides along the fixed bar 203, and the first spring 206 is compressed synchronously. The elastic deformation of the second spring 212 and the first spring 206 absorbs the impact force of mold closing, achieving soft docking and avoiding rigid collision. During this stage, the sealing gasket 2... 09. With the tight fit of the joint, a sealed environment is formed in advance. The main molten material flows in from the main injection hole 302, pushing the movable tube 304 to move the movable plate 305. The spring 307 is compressed to generate a reverse elastic force. At the same time, the damping plate 308 rubs against the inner wall of the mold to form a damping resistance. The two work together to reduce the impact speed of the molten material. Some of the molten material is fed through the auxiliary injection hole 202 to avoid pressure concentration at a single inlet. During the pressure holding stage, the elastic restoring force of the spring 307 and the continuous damping effect of the damping plate 308 can absorb the peak value of the molten material pressure fluctuation. Combined with the flexible seal of the rubber pad 306, it ensures that the cavity pressure is uniform and stable, reducing product defects caused by sudden pressure changes.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cushioned injection mold, comprising two main bodies (1), characterized in that: A connecting component (2) is provided on one side of the main body (1). The connecting component (2) includes a first docking block (201), a secondary injection hole (202), a fixing strip (203), a movable rod (204), a snap-fit ​​rod (205), and a first spring (206). An injection component (3) is provided on the top of the second docking block (207). The injection component (3) includes a main injection hole (302), a limiting ring (303), a movable tube (304), a movable disc (305), a rubber pad (306), and a damping plate (308). Both docking blocks (201) are fixedly connected to the opposite side of the main body (1). The docking block (201) has an auxiliary injection hole (202) inside. The opposite side of the main body (1) is fixedly connected to a fixing strip (203). Two movable rods (204) are movably connected to one side of the fixing strip (203). The movable rods (204) are movably sleeved with the docking block (201).

2. The injection mold with cushioning according to claim 1, characterized in that: The connecting assembly (2) further includes a snap-fit ​​rod (205), which is fixedly connected to the other end of the movable rod (204), and a spring (206) is movably connected to the side surface of the movable rod (204).

3. The injection mold with cushioning according to claim 1, characterized in that: A second docking block (207) is fixedly connected to each opposite side of the main body (1). The second docking block (207) is adapted to the first docking block (201). A connecting groove (208) is provided on one side of the second docking block (207). A sealing gasket (209) is fixedly connected inside the connecting groove (208). Two insertion holes (210) are provided on one side of the connecting groove (208). Two telescopic rods (211) are fixedly connected inside the insertion hole (210). A second spring (212) is movably connected to the side surface of the telescopic rod (211). A snap-fit ​​block (213) is fixedly connected to the other end of the telescopic rod (211). The snap-fit ​​block (213) is adapted to the snap-fit ​​rod (205).

4. The injection mold with cushioning according to claim 1, characterized in that: The injection component (3) also includes a groove (301), which is located on one side of the main body (1). A main injection hole (302) is provided inside the groove (301), and a movable disk (305) is movably connected inside the groove (301).

5. The injection mold with cushioning according to claim 1, characterized in that: One side of the movable disc (305) is fixedly connected to a movable tube (304), and one side of the main body (1) is fixedly connected to a limit ring (303). The movable tube (304) is movably sleeved with the main injection hole (302).

6. The injection mold with cushioning according to claim 1, characterized in that: A spring (307) is movably connected to the side surface of the movable tube (304), a damping plate (308) is fixedly connected to the side surface of the movable tube (304), and a rubber pad (306) is fixedly connected to one side of the movable disc (305).

7. The injection mold with cushioning according to claim 1, characterized in that: The main body (1) has several insertion holes (4) at each of its four corners, a U-shaped groove (5) at one side, a plug rod (6) at each of its four corners, and a U-shaped block (7) at one side.

8. The injection mold with cushioning according to claim 1, characterized in that: The inner wall of one side of the main body (1) is provided with several pneumatic grooves (8), and a pneumatic push rod (9) is movably connected inside the pneumatic groove (8). An air inlet (10) is fixedly connected to one side of the main body (1).