Space-saving injection mold

Abstract

The utility model relates to a space -saving injection mold, including front mould assembly and rear mould assembly, and front mould assembly includes front mould base and pressing piece, and the pressing piece fixedly connected at the bottom of front mould base, the rear mould assembly includes rear mould base, first forming piece, second forming piece and hydraulic transmission mechanism, and is equipped with the forming cavity on the rear mould base, and first forming piece and second forming piece all are equipped with the outside of forming cavity, and with rear mould base sliding connection, and hydraulic transmission mechanism includes hydraulic pipe and the first piston and second piston in the hydraulic pipe, and the liquid is filled between first piston and second piston, and first forming piece is connected with first piston, and second forming piece is connected with second piston, the pressing piece is used to drive first forming piece to slide, and through hydraulic transmission mechanism can drive second forming piece and first forming piece along the same direction sliding, the utility model has solved the present injection mold in each side forming piece, and each need corresponding setting pressing piece outside, lead to the problem of occupying too much space, causes the mould production cost big problem.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and specifically to a space-saving injection mold. Background Technology

[0002] Injection molds are tools used for injection molding, a method of producing industrial plastic products. Injection molding is a process in which plastic (such as plastic granules or fibers) is heated to a molten state. The molten plastic is then injected into a mold using an injection molding machine. After cooling, the material solidifies into the desired shape and size. Simply put, this process involves melting solid material into a liquid, placing it in a fixed mold, and waiting for it to cool and solidify before removing it.

[0003] When existing injection molds are used to form the side structure (recessed or convex) of a product, a side core-pulling mechanism is usually required. For example, the technical solution disclosed in Chinese patent document CN105082472A shows that in the existing side core-pulling mechanism, one pressure member can only drive one side molding part to move. Each side molding part needs to be equipped with a corresponding pressure member, which results in excessive space occupation and high mold production costs.

[0004] Therefore, it is necessary to provide a technical solution to address the above problems. Utility Model Content

[0005] This utility model provides a space-saving injection mold, aiming to solve the problem that in existing injection molds, each side molding part needs to be equipped with a corresponding pressure part, which results in excessive space occupation and high mold production costs.

[0006] To achieve the above objectives, this utility model provides a space-saving injection mold, including a front mold assembly and a rear mold assembly;

[0007] The front mold assembly includes a front mold base and a pressure member, wherein the pressure member is fixedly connected to the bottom of the front mold base;

[0008] The rear mold assembly includes a rear mold base, a first molding component, a second molding component, and a hydraulic transmission mechanism. The rear mold base has a molding cavity. The first molding component and the second molding component are both located outside the molding cavity and are slidably connected to the rear mold base. The hydraulic transmission mechanism includes a hydraulic pipe and a first piston and a second piston located inside the hydraulic pipe. Liquid is filled between the first piston and the second piston. The first molding component is connected to the first piston, and the second molding component is connected to the second piston.

[0009] The pressing element is used to drive the first molded part to slide, and the hydraulic transmission mechanism can drive the second molded part to slide in the same direction as the first molded part.

[0010] More specifically, the hydraulic pipe includes a first pipe body, a second pipe body, and a hose, with the first piston movably connected to the first pipe body, the second piston movably connected to the second pipe body, and the hose connecting the first pipe body and the second pipe body.

[0011] More specifically, the cross-sectional area of ​​the first tube is larger than that of the second tube.

[0012] More specifically, the hydraulic pipe includes an integrally formed flared section and a narrow section, with the first piston movably connected within the flared section and the second piston movably connected within the narrow section.

[0013] More specifically, the first molded part has an inclined surface on the side away from the molding cavity, and the pressure member abuts against the inclined surface; a first spring is installed on the rear mold base to drive the first molded part to move away from the molding cavity.

[0014] More specifically, a wear-resistant block is fixedly connected to the pressing component, and the wear-resistant block is in contact with the first molded component.

[0015] More specifically, the first molded part has an oblique guide hole, and a guide rod is installed on the front mold base, the guide rod passing through the guide hole.

[0016] More specifically, the space-saving injection mold also includes an ejection assembly for demolding the product.

[0017] The technical advantages of the space-saving injection mold involved in this utility model are as follows:

[0018] This application utilizes a hydraulic transmission mechanism to enable the first molding part to drive the second molding part to move. In this way, there is no need to add a pressure member on the outside of the second molding part to drive the movement of the second molding part, which effectively reduces the space required for the mold at the second molding part and lowers the production cost of the mold. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a space-saving injection mold involved in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the rear mold assembly in a space-saving injection mold according to this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram showing the fit between the first molding part and the pressing part in a space-saving injection mold according to the present invention.

[0023] Marked in the image:

[0024] 1. Front mold assembly; 2. Rear mold assembly; 3. Ejection assembly;

[0025] 11. Front mold base; 12. Pressing part; 13. Guide rod;

[0026] 21. Rear mold base; 22. First molding part; 23. Second molding part; 24. Hydraulic transmission mechanism; 241. Hydraulic pipe; 2411. First pipe body; 2412. Second pipe body; 2413. Hose; 242. First piston; 243. Second piston; 25. Wear-resistant block. Detailed Implementation

[0027] 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.

[0028] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component at the same time; when a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component at the same time.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of the embodiments of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0031] To more clearly illustrate the technical solution of this utility model, a preferred embodiment is provided below for reference. Figures 1-4 A space-saving injection mold, comprising a front mold assembly 1 and a rear mold assembly 2;

[0032] The front mold assembly 1 includes a front mold base 11 and a pressure member 12, with the pressure member 12 fixedly connected to the bottom of the front mold base 11;

[0033] The rear mold assembly 2 includes a rear mold base 21, a first molding component 22, a second molding component 23, and a hydraulic transmission mechanism 24. The rear mold base 21 is provided with a molding cavity. The first molding component 22 and the second molding component 23 are both located outside the molding cavity and are slidably connected to the rear mold base 21. The hydraulic transmission mechanism 24 includes a hydraulic pipe 241 and a first piston 242 and a second piston 243 located inside the hydraulic pipe 241. Liquid is filled between the first piston 242 and the second piston 243. The first molding component 22 is connected to the first piston 242, and the second molding component 23 is connected to the second piston 243.

[0034] The pressure member 12 is used to drive the first molded part 22 to slide, and the hydraulic transmission mechanism 24 can drive the second molded part 23 to slide in the same direction as the first molded part 22.

[0035] The working process of the injection mold involved in this embodiment is as follows: When the front mold assembly 1 and the rear mold assembly 2 move relative to each other to open the mold, the pressure member 12 drives the first molding part 22 to slide away from the molding cavity. When the first molding part 22 moves, the first piston 242 moves. Under the pressure of the liquid, the second piston 243 moves simultaneously, causing the second molding part 23 to move. Thus, when the first molding part 22 is demolded, the second molding part 23 is also demolded. Compared with the traditional side core-pulling mechanism of injection molds, this design differs in that it can realize the movement of two molding parts using only one pressure member 12. There is no need to set another pressure member 12 on the outside of the second molding part 23, effectively utilizing the mold space required at the second molding part 23, thereby reducing the production cost of the mold.

[0036] In this embodiment, the hydraulic pipe 241 includes a first pipe body 2411, a second pipe body 2412, and a hose 2413. A first piston 242 is movably connected inside the first pipe body 2411, and a second piston 243 is movably connected inside the second pipe body 2412. The hose 2413 connects the first pipe body 2411 and the second pipe body 2412. The design of the hose 2413 can compensate for the positional tolerance between the first molded part 22 and the second molded part 23, allowing the hydraulic pipe 241 to better fit with the first molded part 22 and the second molded part 23.

[0037] Furthermore, the cross-sectional area of ​​the first tube 2411 is larger than that of the second tube 2412, so that the movement between the first molded part 22 and the second molded part 23 can form a differential speed, which satisfies the demolding requirements of the first molded part 22 and the second molded part 23.

[0038] In this embodiment, a second spring is provided in the first tube 2411 and the second tube 2412. The second spring in the first tube 2411 is used to assist the first piston 242 in resetting, and the second spring in the second tube 2412 is used to assist the second piston 243 in resetting.

[0039] In other embodiments, the hydraulic pipe 241 includes an integrally formed flared section and a narrow section, with a first piston 242 movably connected within the flared section and a second piston 243 movably connected within the narrow section. This allows for differential movement between the first molded part 22 and the second molded part 23, satisfying the demolding requirements of both parts.

[0040] In this embodiment, the hydraulic transmission mechanism 24 may be provided in multiple sets to ensure that the second molded part 23 is subjected to sufficient driving force.

[0041] In this embodiment, the first molded part 22 has an inclined surface on the side away from the molding cavity, and the pressure member 12 abuts against the inclined surface; a first spring is installed on the rear mold base 21 to drive the first molded part 22 to move away from the molding cavity. For details, please refer to the side core pulling mechanism disclosed in Chinese Patent Document No. CN105082472A, which will not be described in detail here.

[0042] In this embodiment, a wear-resistant block 25 is fixedly connected to the first molded part 22, and the wear-resistant block 25 is in contact with the pressing part 12. The addition of the wear-resistant block 25 can extend the service life of the pressing part 12 and the first molded part 22.

[0043] In this embodiment, an oblique guide hole is formed on the first molded part 22, and a guide rod 13 is installed on the front mold base, with the guide rod 13 passing through the guide hole. The addition of the guide rod 13 and the guide hole improves the sliding stability of the first molded part 22.

[0044] In this embodiment, the space-saving injection mold also includes an ejection assembly 3 for demolding the product.

[0045] The above description is only a preferred embodiment of the present utility model, and its structure is not limited to the shapes listed above. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A space-saving injection mold, comprising a front mold assembly and a rear mold assembly, characterized in that: The front mold assembly includes a front mold base and a pressure member, wherein the pressure member is fixedly connected to the bottom of the front mold base; The rear mold assembly includes a rear mold base, a first molding component, a second molding component, and a hydraulic transmission mechanism. The rear mold base has a molding cavity. The first molding component and the second molding component are both located outside the molding cavity and are slidably connected to the rear mold base. The hydraulic transmission mechanism includes a hydraulic pipe and a first piston and a second piston located inside the hydraulic pipe. Liquid is filled between the first piston and the second piston. The first molding component is connected to the first piston, and the second molding component is connected to the second piston. The pressing element is used to drive the first molded part to slide, and the hydraulic transmission mechanism can drive the second molded part to slide in the same direction as the first molded part.

2. The space-saving injection mold as described in claim 1, characterized in that: The hydraulic pipe includes a first pipe body, a second pipe body, and a hose. The first piston is movably connected to the first pipe body, the second piston is movably connected to the second pipe body, and the hose connects the first pipe body and the second pipe body.

3. The space-saving injection mold as described in claim 2, characterized in that: The cross-sectional area of ​​the first tube is larger than that of the second tube.

4. The space-saving injection mold as described in claim 1, characterized in that: The hydraulic pipe includes an integrally formed flared section and a narrow section, with the first piston movably connected within the flared section and the second piston movably connected within the narrow section.

5. The space-saving injection mold as described in claim 1, characterized in that: The first molded part has an inclined surface on the side away from the molding cavity, and the pressure member abuts against the inclined surface; a first spring is installed on the rear mold base to drive the first molded part to move away from the molding cavity.

6. The space-saving injection mold as described in claim 5, characterized in that: A wear-resistant block is fixedly connected to the pressing component, and the wear-resistant block is in contact with the first molded component.

7. The space-saving injection mold as described in claim 1, characterized in that: The first molded part has an oblique guide hole, and a guide rod is installed on the front mold base, the guide rod passing through the guide hole.

8. The space-saving injection mold as described in claim 1, characterized in that: The space-saving injection mold also includes an ejection assembly for demolding the product.

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