Injection molds for products combining soft and hard plastics

Abstract

This utility model relates to an injection mold for products combining soft and hard rubber. Existing two-color products are mainly composed of soft and hard rubber, with the soft rubber portion protruding beyond the hard rubber, making it impossible for conventional injection molds to seal the product in one pass. This utility model includes a face pin plate and a bottom pin plate that cooperate with each other. The face pin plate has inserts corresponding to the shape of the protruding soft rubber portion of the product, and the bottom pin plate has a slider at its lower part. When the slider is driven to the side by a drive mechanism, the pin plate and inserts move downwards a certain distance. This utility model, by using a slider to move the inserts, pre-reserves space for soft rubber injection, facilitating smooth injection of both soft and hard rubber into the product. The overall structure is simple, saving fitter time in mold assembly.

Description

Technical Field

[0001] This utility model relates to an injection mold for a combination of soft and hard plastic products. Background Technology

[0002] There is a type of two-color product, such as Figure 1 As shown, the product is mainly composed of soft rubber 3 and hard rubber 2. The soft rubber and hard rubber are two different colors. The product has a structure that protrudes from the hard rubber in the soft rubber part, which makes it impossible for conventional injection molds to seal the rubber in one go. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing an injection mold for products combining soft and hard plastics. The overall structure is simple, enabling smooth injection of soft plastics and saving fitter time in mold assembly.

[0004] The present invention adopts the following technical solution: a soft and hard rubber combination product injection mold, including a face pin plate and a bottom pin plate that cooperate with each other, characterized in that the face pin plate is provided with a corresponding insert for the shape of the protruding part of the soft rubber of the product, and a slider is provided at the lower part of the bottom pin plate. After the slider is driven by the driving mechanism to move to the side, the pin plate and the insert move downward a certain distance.

[0005] Preferably, multiple keyways are uniformly formed on the upper part of the slider, and corresponding keyways are formed on the lower part of the bottom pin plate.

[0006] Preferably, the slider is provided with a bent pin on its side, and the horizontal movement of the slider is driven by the up-and-down movement of the bent pin.

[0007] Preferably, springs are provided on both sides of the upper part of the needle plate.

[0008] Preferably, the insert comprises a plurality of insert blocks arranged in a connected manner.

[0009] Preferably, the insert is mounted on an insert mounting base, which is disposed on a face needle plate.

[0010] Preferably, the slider is pulled out by the bent pin with a stroke of 20mm, and the insert falls a distance of 0.8mm.

[0011] This invention uses a slider to move the insert, leaving space for soft rubber injection in advance, so as to smoothly complete the injection molding of soft and hard rubber products. The overall structure is simple and saves the fitter's mold-making time. Attached Figure Description

[0012] Figure 1 This is a structural diagram of a product being processed.

[0013] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 3 This is a schematic diagram of the slider's structure.

[0015] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 5 This is a cross-sectional schematic diagram of the bent pin and slider after their movement according to this utility model.

[0017] In the diagram: 1. Product 2. Hard rubber 3. Soft rubber 4. Spring 5. Top pin plate 6. Bottom pin plate 7. Slider 8. Insert 9. Insert mounting base 10. Bent pin 11. Keyway Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] like Figure 2 The injection mold shown includes a combination of hard and soft rubber products, comprising a face pin plate 5 and a bottom pin plate 6 that cooperate with each other. The face pin plate 5 has inserts 8 corresponding to the shape of the protruding soft rubber portion of the product. A slider 7 is provided at the lower part of the bottom pin plate. After the slider 7 is driven to move laterally by a drive mechanism, the pin plate and inserts 8 move downwards a certain distance. This downward movement of the inserts creates space for the soft rubber injection, facilitating smooth processing.

[0020] like Figure 3 As shown, multiple keyways 11 are evenly formed on the upper part of the slider 7, and corresponding keyways 11 are formed on the lower part of the bottom pin plate 6. The slider moves to match the keyways on its upper part with the keyways on the lower part of the bottom pin plate, and adjusting the height of the pin plate adjusts the protruding position of the insert.

[0021] Specifically, a bent pin 10 is provided on the side of the slider, and the horizontal movement of the slider 7 is driven by the up-and-down movement of the bent pin 10.

[0022] Specifically, springs 4 are provided on both sides of the upper part of the needle plate 5. After the slider moves a certain distance, the springs spring open and lock the needle plate into the keyway.

[0023] Specifically, the insert 8 includes multiple insert blocks arranged in a connected manner. To facilitate injection molding of different soft rubber parts, multiple different insert blocks can be flexibly adapted and converted as needed.

[0024] Specifically, the insert is mounted on the insert mounting base 9, which is located on the needle plate 5. The mounting base is positioned and mounted on the needle plate.

[0025] Specifically, the slider 7 is pulled out by the bent pin with a stroke of 20mm, and the drop distance of the insert is 0.8mm.

[0026] like Figures 4-5 As shown, this invention uses an insert designed to fit the shape of the protruding part of the soft rubber. During mold opening, a bent pin drives a slider, which retracts 20mm. The spring then releases, engaging the needle plate into the keyway. This causes the needle plate to drop 0.8mm along with the insert, creating space for soft rubber injection. The machine then rotates to complete the injection, and the process is repeated. This invention enables smooth soft rubber injection, has a simple and reasonable structure, and saves mold-making time for fitters.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. In short, if a person skilled in the art is inspired by it and designs a similar structure and embodiment without departing from the inventive concept of the present utility model, it shall fall within the protection scope of the present utility model.

Claims

1. An injection mold for a combination of soft and hard plastic products, comprising a face pin plate (5) and a bottom pin plate (6) that cooperate with each other, characterized in that... The face needle plate (5) is provided with a corresponding insert (8) for the shape of the soft rubber protrusion of the product. The bottom needle plate is provided with a slider (7). After the slider (7) is driven by the driving mechanism to move to the side, the needle plate and insert (8) move downward a certain distance.

2. The injection mold for a combination of soft and hard rubber products according to claim 1, characterized in that... Multiple keyways (11) are uniformly formed on the upper part of the slider (7), and corresponding keyways (11) are formed on the lower part of the bottom pin plate (6).

3. The injection mold for a combination of soft and hard rubber products according to claim 2, characterized in that... The slider is provided with a bent pin (10) on its side, and the slider (7) moves horizontally by the up and down movement of the bent pin (10).

4. The injection mold for a combination of soft and hard rubber products according to any one of claims 1-3, characterized in that... Springs (4) are provided on both sides of the upper part of the needle plate (5).

5. The injection mold for a combination of soft and hard rubber products according to claim 4, characterized in that... The insert (8) includes a plurality of insert blocks arranged in a connected manner.

6. The injection mold for a combination of soft and hard rubber products according to claim 5, characterized in that... The insert is mounted on the insert mounting base (9), which is located on the face pin plate (5).

7. The injection mold for a combination of soft and hard rubber products according to claim 3, characterized in that... The slider (7) is pulled out by the bent pin for 20mm, and the drop distance of the insert is 0.8mm.

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