A sliding mechanism for the male mold of a two-shot mold

Abstract

This invention relates to a sliding mechanism for a male mold in a double-shot die, comprising: a first-shot female mold with a first deflector block for resetting a sliding insert during the first-shot die closing, causing its protrusion to form the first structure of the product; a second-shot female mold with a second deflector block for pushing the sliding insert during the second-shot die closing, causing its concave portion to form the second structure of the product; a sliding insert with a concave ridge that cooperates with a pressure plate to limit its displacement, having a protrusion and a concave ridge on one side for forming the structure of the product, and having a movable hole inside for reciprocating motion of the sliding insert under the action of the first and second deflectors block; and a pressure plate disposed on the concave ridge of the sliding insert for limiting its displacement. The beneficial effect of this invention is that, by using the different positions of the first deflector block of the first-shot female mold and the second deflector block of the second-shot female mold, the sliding insert is pushed to reciprocate during the die closing, allowing the second structure to cover the first structure, solving the problem of easy peeling at the product joint, and enhancing the bonding strength of the product.

Description

[Technical Field]

[0001] This invention relates to the field of mold mechanism technology, and in particular to a male mold sliding mechanism for a double-shot mold. [Background Technology]

[0002] Two-shot injection molding refers to a molding method in which two different colors or different physical properties of plastics are injected into a mold, resulting in a product with two different colors or different physical properties, thereby improving the product's practicality and aesthetics.

[0003] like Figures 1-2 The product shown is manufactured by first using hard plastic to form the first structure 20 in a two-shot molding process, and then using soft plastic to form the second structure 30. The second structure 30 formed by the two-shot molding is directly sealed to the surface of the first structure 20 formed by the first shot molding. This will cause the joint between the hard plastic and the soft plastic to peel off easily, that is, the product has a weak bonding strength.

[0004] In view of this, it is necessary to provide a sliding mechanism for the male mold of a double-shot mold to solve the above problems. [Summary of the Invention]

[0005] The technical problem this invention aims to solve is that in the molding of double-shot products, a first structure is formed using a hard plastic injection molding process, followed by a second structure formed using a soft plastic injection molding process. The second structure formed in the second injection molding process is directly sealed to the surface of the first structure formed in the first injection molding process. This leads to easy peeling at the joint between the hard and soft plastics, resulting in weak product bonding strength. Therefore, this invention provides a sliding mechanism for the male mold of a double-shot mold to solve the above problem.

[0006] The solution to the technical problem of this invention is: a male mold sliding mechanism for a double-shot mold, comprising:

[0007] The master mold, wherein the master mold is provided with a first-shot master mold and a second-shot master mold in the mold; wherein...

[0008] A first injection mold, wherein a first push block is fixed inside the first injection mold by a fixing member. The first push block is used to push the sliding insert to reset when the mold is closed, so that the protrusion on the sliding insert is reset to the product position, for forming the first structure of the product.

[0009] The second injection mold has a second pusher block fixed inside by a fixing member. The second pusher block is used to push the sliding insert when the two injection molds are closed, so that the protrusion on the sliding insert exits the first structure of the product, and at the same time, the concave block moves to the product, so that the formed second structure covers the first structure of the product.

[0010] A male mold, which mates with a first-shot female mold to form a first structure of the product, and with a second-shot female mold to form a second structure of the product, wherein the male mold contains a sliding insert and a pressure plate; wherein...

[0011] A sliding insert has a concave ridge on one side, which can cooperate with a pressure plate to restrict the displacement of the sliding insert and allow it to reciprocate within the mold along the direction of the pressure plate. The other side of the sliding insert has a protrusion for forming a first structure and a concave block for forming a second structure. The sliding insert has a movable hole, which allows the protrusion of the sliding insert to be reset to the product position via a first pusher during the first injection molding process to form the first structure of the product. In the second injection molding process, the protrusion of the sliding insert is driven out of the first structure of the product via a second pusher, while the concave block moves to the product position to form the second structure of the product.

[0012] A pressure plate is fixed inside the male mold by a fastener. The pressure plate is provided on the concave edge of the sliding insert and is used to limit the displacement of the sliding insert.

[0013] The product has a first structure and a second structure. The first structure is formed by molding a female mold and a male mold together, and the second structure is formed by molding a female mold and a male mold together. The first structure has an extension structure on the side that contacts the second structure. The extension structure can cover the extension structure of the first structure formed by the first injection when the second structure is formed by the second injection, thereby enhancing the bonding strength between the first structure and the second structure of the product.

[0014] Preferably, all the fasteners are screws.

[0015] Preferably, one end of the first and second levers is V-shaped, which conforms to the movable hole in the sliding insert. The inclined surfaces of the first and second levers can act on the movable hole to drive the sliding insert to move.

[0016] Preferably, the first and second push blocks have a boss at one end of the "V" shape, which can push the sliding insert back to its original position during the first and second injection molding processes.

[0017] Preferably, the second pusher block is provided with a recessed platform, which can push the sliding insert to fit against the product end when the two-shot mold is closed, so that the sliding insert closely matches the first structure of the product, and prevents the molded product from having rough edges due to the gap left between the first structure and the sliding insert during the second shot of soft rubber.

[0018] Preferably, the mold may be provided with one or more sliding mechanisms for simultaneously molding one or more products, which can effectively improve production efficiency.

[0019] The beneficial effects of this invention are that, through a male mold sliding mechanism of a double-shot mold, the different positions of the first pusher block in the first-shot female mold and the second pusher block in the second-shot female mold allow the sliding insert to reciprocate when the male and female molds are closed. This enables the protrusions and concave blocks on the sliding insert to cooperate in forming the first and second structures of the product. This allows the second structure to cover the extension structure of the first structure during molding, solving the problem of easy peeling at the joint between the first-shot hard plastic and the second-shot soft plastic, enhancing the bonding strength of the product. Furthermore, this mold has a simple structure, is easy to install, and has low cost. [Attached Image Description]

[0020] Figure 1 This is a structural diagram of a well-known product.

[0021] Figure 2 yes Figure 1 Cross-sectional view of AA.

[0022] Figure 3 This is a schematic diagram of the structure of the product in this invention.

[0023] Figure 4 yes Figure 3 Cross-sectional view of BB in the middle.

[0024] Figure 5 This is a schematic diagram of the sliding mechanism of the male mold of a double-shot mold according to the present invention.

[0025] Figure 6 yes Figure 5 A magnified view of point C in the middle.

[0026] Figure 7 This is a schematic diagram of the structure of the first-shot master mold and the second-shot master mold in this invention.

[0027] Figure 8 This is a structural diagram of the sliding insert and the pressure plate.

[0028] Figure 9 This is a schematic diagram of the structure of the first and second levers.

Detailed Implementation Methods

[0029] To further illustrate the technical means and effects of the present invention, the following detailed description is provided in conjunction with the embodiments of the present invention and their accompanying drawings.

[0030] This invention provides a male mold sliding mechanism for a double-shot mold, comprising:

[0031] The female mold 110 is provided with a first-shot female mold 120 and a second-shot female mold 130 within the mold; wherein...

[0032] A first injection mold 120, wherein a first push block 121 is fixed inside the first injection mold 120 by a fixing member 170. The first push block 121 is used to push the sliding insert 150 to reset when the mold is closed, so that the protrusion 152 on the sliding insert 150 is reset to the product 100, for forming the first structure 101 of the product.

[0033] The second injection mold 130 has a second push block 131 fixed inside by a fixing member 170. The second push block 131 is used to push the sliding insert 150 when the two injections are closed, so that the protrusion 152 on the sliding insert 150 exits the first structure 101 of the product 100, and at the same time, the concave block 153 moves to the product 100, so that the formed second structure 102 covers the first structure 101 of the product 100.

[0034] A male mold 140, which mates with a first-shot female mold 120 to form a first structure 101 of the product 100, and mates with a second-shot female mold 130 to form a second structure 102 of the product 100. The male mold 140 contains a sliding insert 150 and a pressure plate 160.

[0035] A sliding insert 150 has a concave ridge 151 on one side, which can cooperate with a pressure plate 160 to limit the displacement of the sliding insert 150 by the pressure plate 160, so that the sliding insert 150 reciprocates within the mold 140 along the direction of the pressure plate 160. The other side of the sliding insert 150 has a protrusion 152 for forming a first structure 101 and a concave block 153 for forming a second structure 102. The sliding insert 150 has a movable hole 154. In the first injection molding, the movable hole 154 can drive the protrusion 152 of the sliding insert 150 to return to the product 100 through a first pusher block 121 to form the first structure 101 of the product 100. In the second injection molding, the protrusion 152 of the sliding insert 150 can be driven out of the first structure 101 of the product 100 through a second pusher block 131, while the concave block 153 moves to the product 100 to form the second structure 102 of the product 100.

[0036] Pressure plate 160, which is fixed in the male mold 140 by fastener 170, is provided on the concave edge 151 of sliding insert 150 to limit the displacement of sliding insert 150.

[0037] Product 100 has a first structure 101 and a second structure 102. The first structure 101 is formed by molding a female mold 120 and a male mold 140 together. The second structure 102 is formed by molding a female mold 130 and a male mold 140 together. The first structure 101 has an extension structure 103 on the side that contacts the second structure 102. The extension structure 103 can cover the extension structure 103 of the first structure 101 formed by molding the second structure 102 by molding the second structure, thereby enhancing the bonding strength between the first structure 101 and the second structure 102 of the product 100.

[0038] All of the fasteners 170 are screws.

[0039] Wherein, one end of the first lever 121 and the second lever 131 is V-shaped, which is similar to the movable hole 154 in the sliding insert 150. The inclined surface 180 of the first lever 121 and the second lever 131 acts on the movable hole 154, causing it to drive the sliding insert 150 to move.

[0040] The first pusher block 121 and the second pusher block 131 are provided with a boss 190 at one end of the "V" shape. The boss 190 can push the sliding insert 150 back to its original position when the first and second injections are closed.

[0041] The second push block 131 is provided with a recess 200. The recess 200 can push the sliding insert 150 to fit against the product 100 end when the two-shot mold is closed, so that the sliding insert 150 and the first structure 101 of the product 100 are closely matched, preventing the product 100 from having rough edges due to the gap left between the first structure 101 and the sliding insert 150 during the two-shot soft rubber injection.

[0042] The male mold 140 may be provided with one or more sliding mechanisms for simultaneously forming one or more products 100. In this embodiment, the male mold 140 is provided with four sliding mechanisms, which can effectively improve production efficiency.

[0043] The beneficial effects of this invention are that, through a male mold sliding mechanism of a double-shot mold, the different positions of the first push block 121 in the first-shot female mold 120 and the second push block 131 in the second-shot female mold 130 allow the sliding insert 150 to reciprocate when the male and female molds are closed. This allows the protrusions 152 and concave blocks 153 on the sliding insert 150 to cooperate with the product 100 to form the first structure 101 and the second structure 102. This ensures that the second structure 102 covers the extension structure 103 of the first structure 101 during molding, solving the problem of easy peeling at the joint between the first-shot hard plastic and the second-shot soft plastic, enhancing the bonding strength of the product 100. Furthermore, this mold structure is simple, easy to install, and low in cost.

[0044] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A male mold sliding mechanism for a double-shot mold, characterized in that, include: The master mold, wherein the master mold is provided with a first-shot master mold and a second-shot master mold in the mold; wherein... A first injection mold, wherein a first push block is fixed inside the first injection mold by a fixing member. The first push block is used to push the sliding insert to reset when the mold is closed, so that the protrusion on the sliding insert is reset to the product position, for forming the first structure of the product. The second-shot mold has a second pusher block fixed inside by a fixing member. The second pusher block is used to push the sliding insert when the mold closes for the second shot, causing the protrusion on the sliding insert to exit the first structure of the product, and at the same time causing the concave block to move to the product, so that the formed second structure covers the first structure of the product. The second pusher block has a concave platform, which pushes the sliding insert to fit against the product end when the mold closes for the second shot, so that the sliding insert and the first structure of the product are closely matched, preventing the formed product from having rough edges due to the gap between the first structure and the sliding insert during the second shot of soft rubber. One end of the first pusher block and the second pusher block are V-shaped, which are similar to the movable hole in the sliding insert. The inclined surfaces of the first pusher block and the second pusher block act on the movable hole, causing it to drive the sliding insert to move. A male mold, which mates with a first-shot female mold to form a first structure of the product, and with a second-shot female mold to form a second structure of the product, wherein the male mold contains a sliding insert and a pressure plate; wherein... A sliding insert has a concave ridge on one side, which can cooperate with a pressure plate to restrict the displacement of the sliding insert and allow it to reciprocate within the mold along the direction of the pressure plate. The other side of the sliding insert has a protrusion for forming a first structure and a concave block for forming a second structure. The sliding insert has a movable hole, which allows the protrusion of the sliding insert to be reset to the product position via a first pusher during the first injection molding process to form the first structure of the product. In the second injection molding process, the protrusion of the sliding insert is driven out of the first structure of the product via a second pusher, while the concave block moves to the product position to form the second structure of the product. A pressure plate is fixed inside the male mold by a fastener. The pressure plate is provided on the concave edge of the sliding insert and is used to limit the displacement of the sliding insert. When the male mold and the female mold are used to form the first structure of the product, an extension structure is formed on the side where the first structure and the second structure are in contact. The extension structure covers the first structure formed by the first injection when the second structure is formed by the second injection, thereby enhancing the bonding strength between the first structure and the second structure of the product.

2. The male mold sliding mechanism of a double-shot mold as described in claim 1, characterized in that: All the fasteners are screws.

3. The male mold sliding mechanism of a double-shot mold as described in claim 1, characterized in that: The first and second push blocks have a boss at one end of their "V" shape. The boss can push the sliding insert back to its original position during the first and second injection molding processes.

4. The male mold sliding mechanism of a double-shot mold as described in claim 1, characterized in that: The mold can be equipped with one or more sliding mechanisms to simultaneously form one or more products, which can effectively improve production efficiency.

Images