A slider positioning mechanism in plastic part forming

Abstract

The application is a slider positioning mechanism in plastic part forming, comprising: a slider square insert provided on a slider body of a two-shot mold, which functions to increase the inner side pressure of the iron part, and is provided with a pressing block, which functions to enhance the pressure of the slider square insert on the inner side of the iron part; an iron part, which assists in forming a water-soluble part in a one-shot mold and assists in forming a plastic part together with the water-soluble part in a two-shot mold, and is provided with a round hole at both ends, so that the slider round insert is inserted into the round hole to position the iron part, and is provided with a through hole in the middle, so that the slider square insert is inserted into the through hole to enhance the positioning of the iron part in the Z-axis direction. The beneficial effects of the application are that a slider square insert is newly added to the slider body of the two-shot mold, a through hole is opened in the middle area of the iron part, the slider square insert is inserted into the through hole under the action of the slider body, an inner side pressure point is newly added, the problem of easy warping of the iron part in the Z-axis direction is solved, the sealing of the iron part and the plastic part is more compact, the plastic part is less likely to have a rough edge when being formed, and the yield of the plastic part product is improved.

Description

[Technical Field]

[0001] This invention relates to the field of mold mechanism technology, and in particular to a slider positioning mechanism in plastic part molding. [Background Technology]

[0002] like Figure 1 The diagram shows a composite part 5 formed using an iron part 1 and a water-soluble part 2 as auxiliary plastic parts 3. The current molding method involves first placing the iron part 1 into a first-shot mold and injecting water-soluble material to form a composite part 4 of the iron part 1 and water-soluble part 2. Then, the formed composite part 4 is removed from the first-shot mold and placed into a second-shot mold to form the composite part 5. During the molding process, the first-shot mold and the second-shot mold each have two sliding inserts 50. When the first-shot mold and the second-shot mold close, a hydraulic cylinder acts on the slider body to drive the two sliding inserts 50, causing them to insert into the round holes 6 of the composite part 4. When the first-shot mold and the second-shot mold open, the male mold and the slider body move simultaneously. The slider body drives the two sliding inserts 50 backward, causing them to exit from the round holes 6. Finally, the formed composite part 5 is removed, the iron part 1 is pulled out, and the water-soluble part 2 is dissolved in water, thus obtaining the desired plastic part 3.

[0003] However, when the assembly is taken out of the first injection mold and placed into the second injection mold to form the composite part, the Z-axis positioning of the iron part is only achieved by the two left and right slider round inserts, and there is no middle slider for positioning. This makes it easy for the iron part to warp at the middle position, resulting in a gap between the iron part and the plastic part at the sealing point. This causes burrs to appear on the plastic part when forming the composite part, resulting in a low yield of plastic part products.

[0004] In view of this, it is necessary to provide a slider positioning mechanism in plastic part molding to solve the above problems. [Summary of the Invention]

[0005] The technical problem this invention aims to solve is: in a hybrid part molding process using iron and water-soluble components to assist in the molding of plastic parts, when the combination of iron and water-soluble components is removed from a first-shot mold and placed into a second-shot mold to form the hybrid part of iron, water-soluble, and plastic parts, the iron part is positioned along the Z-axis solely by two left and right sliding blocks, without a central sliding block. This makes the iron part prone to warping at the middle position, resulting in gaps at the sealing area between the iron and plastic parts. Consequently, burrs appear on the plastic part during the second-shot molding of the hybrid part, leading to a low yield of the plastic product. Therefore, this invention provides a sliding block positioning mechanism for plastic part molding to solve the above problems.

[0006] The solution to the technical problem of this invention is: a slider positioning mechanism in plastic part molding, comprising:

[0007] A first-shot mold, wherein the first-shot mold is provided with a first-shot male mold core and a first-shot female mold core, wherein the first-shot male mold core and the first-shot female mold core are closed with the assistance of an iron part to form a water-soluble part, and after the mold is opened, the combination of the iron part and the water-soluble part is taken out from the first-shot male mold core and placed into the second-shot male mold core;

[0008] The two-shot mold is provided with a male mold core and a female mold core. The male mold core and the female mold core are closed with the assistance of the first-shot assembly to form a mixture of iron parts, water-soluble parts and plastic parts. When forming the mixture, the assembly is first placed into the male mold core, and then the mold is closed to form the mixture.

[0009] The slider square insert has a protrusion at one end, which is used to engage with the slider body to fix the slider square insert to the slider body. The other end of the slider square insert has a pressure block, which increases the pressure of the slider square insert on the inside of the iron part. The slider square insert is provided on the slider body of the two-shot mold. When the two-shot male mold core and the two-shot female mold core are closed, the slider body moves simultaneously with it to insert the slider square insert into the through hole of the iron part, thereby increasing the pressure point on the inside of the iron part.

[0010] A slider round insert is fixed on the slider body by a slider. The slider round insert is provided on the slider body of the first injection mold and the second injection mold. When the male mold core and the female mold core of the second injection mold are closed, the slider round insert moves together with the slider body to insert the slider round insert into the round hole of the iron part.

[0011] The iron component is used to assist in the molding of water-soluble parts in a first-shot mold, that is, a combination of iron components and water-soluble parts can be obtained in the first-shot mold. It is also used to assist in the molding of plastic parts in a second-shot mold. The iron component has round holes at both ends, which are used to position the iron component in the second-shot mold by inserting the slider insert into the round holes under the action of the slider body. The iron component has a through hole in the middle, which is used to enhance the positioning of the iron component in the Z-axis direction by inserting the slider insert into the through hole under the action of the slider body in the second-shot mold.

[0012] A water-soluble part, wherein the water-soluble part is formed by injecting water-soluble material into a injection mold with the assistance of an iron part, and is used to assist the molding of plastic parts with iron parts;

[0013] A plastic part is formed in a two-shot mold with the assistance of an iron part and a water-soluble part. That is, a mixture of iron, water-soluble and plastic parts can be obtained in the two-shot mold. After the mixture is formed, the iron part can be pulled out and the water-soluble part can be dissolved in water to obtain the plastic part.

[0014] Preferably, the length of the pressure block in the slider is 2.5 mm.

[0015] Preferably, the number of the slider inserts is two.

[0016] Preferably, the slider is fixed to the slider body by screws.

[0017] Preferably, the iron part is made of aluminum alloy or stainless steel.

[0018] Preferably, the water-soluble component is a water-soluble plastic.

[0019] Preferably, the plastic part is made of ABS plastic.

[0020] The beneficial effects of this invention are as follows: A hybrid part using iron and water-soluble components to assist in the molding of plastic parts is provided. When the combination of iron and water-soluble components is removed from the first-shot mold core and placed into the second-shot mold core to form a hybrid part of iron, water-soluble, and plastic parts, the iron part is positioned along the Z-axis solely by two left and right sliding round inserts, without a central sliding block. This makes the iron part prone to warping at the center, resulting in gaps at the sealant joint between the iron and plastic parts, causing burrs on the plastic part during the two-shot hybrid part molding process. This invention addresses this by adding a square sliding insert to the sliding block body of the second-shot mold and creating a through hole in the center of the iron part. During mold closing, the sliding block body, under the action of a hydraulic cylinder, drives the square sliding insert into the through hole in the iron part, increasing the internal pressure of the iron part. The three inserts—two round sliding inserts and the newly added square sliding insert—solve the problem of warping along the Z-axis of the iron part, resulting in a tighter sealant joint between the iron and plastic parts. This reduces burrs on the plastic part during the two-shot hybrid part molding process, improving the yield rate of the plastic part products. [Attached Image Description]

[0021] Figure 1 This is a structural diagram of a commonly known assembly.

[0022] Figure 2 This is a schematic diagram of the structure of a slider positioning mechanism in a molding die for molding plastic parts according to the present invention.

[0023] Figure 3 yes Figure 2 A schematic diagram of the structure of the assembly formed by the injection mold.

[0024] Figure 4 This is a schematic diagram of the structure of a slider positioning mechanism in a two-shot mold for molding plastic parts according to the present invention.

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure of the three-slider insert-assisted molding hybrid part.

[0026] Figure 6 yes Figure 5 A schematic diagram of the cross section of aa.

[0027] Figure 7This is a schematic diagram of the connection between the slider insert and the slider body in a slider positioning mechanism for molding plastic parts according to the present invention.

[0028] Figure 8 This is a schematic diagram of the connection between the slider round insert and the slider body in a slider positioning mechanism for molding plastic parts according to the present invention.

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 slider positioning mechanism for molding plastic parts, comprising:

[0031] A first-shot mold 20 is provided with a first-shot male mold core 21 and a first-shot female mold core 22. The first-shot male mold core 21 and the first-shot female mold core 22 are closed to form a water-soluble part 2 with the assistance of the iron part 1. After the mold is opened, the assembly 4 of the iron part 1 and the water-soluble part 2 is taken out from the first-shot male mold core 21 and placed into the second-shot male mold core 31.

[0032] The two-shot mold 30 is provided with a two-shot male mold core 31 and a two-shot female mold core 32. The two-shot male mold core 31 and the two-shot female mold core 32 are used to close the mold and form a mixture 5 of iron part 1, water-soluble part 2 and plastic part 3 with the assistance of the first-shot assembly 4. When forming the mixture 5, the assembly 4 is first placed into the two-shot male mold core 31, and then the mold is closed to form the mixture 5.

[0033] The slider square insert 40 has a protrusion 90 at one end, which is used to engage with the slider body 60 to fix the slider square insert 40 to the slider body 60. The slider square insert 40 is provided with a pressure block 80, which enhances the pressure of the slider square insert 40 on the inner side of the iron part 1. The slider square insert 40 is provided on the slider body 60 of the two-shot mold 30. When the two-shot male mold core 31 and the two-shot female mold core 32 are closed, the slider body 60 moves simultaneously with it to make the slider square insert 40 insert into the through hole 70 of the iron part 1, thereby increasing the pressure point on the inner side of the iron part 1.

[0034] The slider round insert 50 is fixed on the slider body 60 by the slider 100. The slider round insert 50 is provided on the slider body 60 of the first injection mold 20 and the second injection mold 30. When the second injection male mold core 31 and the second injection female mold core 32 are closed, the slider body 60 moves together with it to make the slider round insert 50 insert into the round hole 6 of the iron part 1.

[0035] Iron part 1 is used to assist in the molding of water-soluble part 2 in the first injection mold 20, that is, the combination of iron part 1 and water-soluble part 2 can be obtained in the first injection mold 20. It is also used to assist in the molding of plastic part 3 in the second injection mold 30. The iron part 1 has round holes 6 at both ends, which are used to position the iron part 1 in the second injection mold 30 by inserting the slider round insert 50 into the round holes 6 under the action of the slider body 60. The iron part 1 has a through hole 70 in the middle, which is used to enhance the positioning of the iron part 1 in the Z-axis direction by inserting the slider square insert 40 into the through hole 70 under the action of the slider body 60 in the second injection mold 30.

[0036] Water-soluble part 2, which is formed by injecting water-soluble material into a injection mold 20 with the assistance of iron part 1, is used to assist the molding of plastic part 3 with iron part 1;

[0037] Plastic part 3 is formed in a two-shot mold 30 with the assistance of iron part 1 and water-soluble part 2. That is, a mixture of iron part 1, water-soluble part 2 and plastic part 3 can be obtained in the two-shot mold 30. After the mixture 5 is formed, iron part 1 in the mixture 5 can be pulled out and placed in water to dissolve water-soluble part 2, thereby obtaining plastic part 3.

[0038] The length of the pressure block 80 in the slider square insert 40 is 2.5 mm.

[0039] The number of the slider circular inserts 50 is two.

[0040] The slider 100 is fixed to the slider body 60 by screws 110.

[0041] The iron part 1 is made of aluminum alloy or stainless steel.

[0042] The water-soluble component 2 is a water-soluble plastic.

[0043] The plastic part 3 is made of ABS plastic.

[0044] The working process of this invention is as follows: First, iron part 1 is placed into a first injection mold 20 and water-soluble material is injected to form an assembly 4 of iron part 1 and water-soluble part 2. Then, the formed assembly 4 is taken out from the first injection male mold core 21 and placed into the second injection male mold core 31. When the second injection mold 30 closes, the hydraulic cylinder acts on the slider body 60 to drive the two slider round inserts 50 and slider square inserts 40 to move, so that the slider round inserts 50 and slider square inserts 40 are respectively inserted into the round hole 6 and through hole 70 of the assembly 4. Then, injection... The mixture 5, consisting of ABS plastic molded iron part 1, water-soluble part 2, and plastic part 3, is formed during the second injection molding process. During the mold opening, the male mold and the slider body 60 move simultaneously. The slider body 60 drives the two slider round inserts 50 and slider square inserts 40 to retract, causing the two slider round inserts 50 and slider square inserts 40 to exit from the round hole 6 and through hole 70, respectively. Finally, the molded mixture 5 is taken out, the iron part 1 in the mixture 5 is pulled out, and the water-soluble part 2 is dissolved in water to obtain the desired plastic part 3 product.

[0045] The beneficial effect of this invention is that, in a hybrid part 5 using an iron part 1 and a water-soluble part 2 to assist in the molding of a plastic part 3, when the assembly 4 of the iron part 1 and the water-soluble part 2 is taken out from the first-shot male mold core 21 and placed into the second-shot male mold core 31 to form the hybrid part 5 of the iron part 1, water-soluble part 2 and plastic part 3, the iron part 1 is positioned in the Z-axis direction only by the left and right sliding round inserts 50, without a middle sliding block for positioning. This makes the middle position of the iron part 1 prone to warping, resulting in gaps at the sealing area of ​​the iron part 1 and the plastic part 3, causing burrs to appear on the plastic part 3 when molding the two-shot hybrid part 5. This invention addresses this issue by using a two-shot mold... A new square slider insert 40 is added to the slider body 60 of part 30. A through hole 70 is opened in the middle area of ​​the iron part 1. When the two-shot mold 30 is closed, the slider body 60 is driven by the hydraulic cylinder to insert the square slider insert 40 into the through hole 70 of the iron part 1, which increases the internal pressure of the iron part 1. The three inserts, namely the two round slider inserts 50 and the newly added square slider insert 40, are used for positioning, which can solve the problem of the iron part 1 being prone to warping in the Z-axis direction. This makes the sealing between the iron part 1 and the plastic part 3 tighter, and the plastic part 3 is less prone to burrs when molding the two-shot mixed part 5, thus improving the yield of the plastic part 3 product.

[0046] 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 slider positioning mechanism in plastic part molding, characterized in that, include: A first-shot mold, wherein the first-shot mold is provided with a first-shot male mold core and a first-shot female mold core, wherein the first-shot male mold core and the first-shot female mold core are closed with the assistance of an iron part to form a water-soluble part, and after the mold is opened, the combination of the iron part and the water-soluble part is taken out from the first-shot male mold core and placed into the second-shot male mold core; The two-shot mold is provided with a male mold core and a female mold core. The male mold core and the female mold core are closed with the assistance of the first-shot assembly to form a mixture of iron parts, water-soluble parts and plastic parts. When forming the mixture, the assembly is first placed into the male mold core, and then the mold is closed to form the mixture. The slider square insert has a protrusion at one end, which is used to engage with the slider body to fix the slider square insert to the slider body. The other end of the slider square insert has a pressure block, which increases the pressure of the slider square insert on the inside of the iron part. The slider square insert is provided on the slider body of the two-shot mold. When the two-shot male mold core and the two-shot female mold core are closed, the slider body moves simultaneously with it to insert the slider square insert into the through hole of the iron part, thereby increasing the pressure point on the inside of the iron part. A slider round insert is fixed on the slider body by a slider. The slider round insert is provided on the slider body of the first injection mold and the second injection mold. When the male mold core and the female mold core of the second injection mold are closed, the slider round insert moves together with the slider body to insert the slider round insert into the round hole of the iron part. The iron component is used to assist in the molding of water-soluble parts in a first-shot mold, that is, a combination of iron components and water-soluble parts can be obtained in the first-shot mold. It is also used to assist in the molding of plastic parts in a second-shot mold. The iron component has round holes at both ends, which are used to position the iron component in the second-shot mold by inserting the slider insert into the round holes under the action of the slider body. The iron component has a through hole in the middle, which is used to enhance the positioning of the iron component in the Z-axis direction by inserting the slider insert into the through hole under the action of the slider body in the second-shot mold. A water-soluble part, wherein the water-soluble part is formed by injecting water-soluble material into a injection mold with the assistance of an iron part, and is used to assist the molding of plastic parts with iron parts; A plastic part is formed in a two-shot mold with the assistance of an iron part and a water-soluble part. That is, a mixture of iron, water-soluble and plastic parts can be obtained in the two-shot mold. After the mixture is formed, the iron part can be pulled out and the water-soluble part can be dissolved in water to obtain the plastic part.

2. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The length of the pressure block in the slider square insert is 2.5 mm.

3. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The number of slider round inserts is two.

4. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The slider is fixed to the slider body by screws.

5. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The iron parts are made of aluminum alloy or stainless steel.

6. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The water-soluble component is a water-soluble plastic.

7. The slider positioning mechanism in plastic part molding as described in claim 1, characterized in that: The plastic part is made of ABS plastic.

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