Spraying part sprue insert structure of rearview mirror

Abstract

The rearview mirror spraying part sprue insert structure comprises a boss arranged in a mold sprue groove and an auxiliary table integrally formed with the boss, the auxiliary table is located in a mold positioning groove, a first communicating hole is downwards formed in the top of the boss, a heightening table is arranged below the boss and the auxiliary table, and a first through hole is formed in the top of the heightening table. One part of the heightening table is located in a mold pouring gate groove, the other part of the heightening table is located in a mold positioning groove, a space is reserved between the heightening table located in the pouring gate groove and the inner wall of the pouring gate groove, a second communication hole communicated with the first communication hole is downwards formed in the top of the heightening table, and the second communication hole is communicated with a mold injection molding hole; the rearview mirror spraying part sprue insert structure has the effects of slowing down the flow speed of injection molding plastic and reducing gas marks generated on the surface of an injection-molded rearview mirror spraying part.

Description

Technical Field

[0001] The present application relates to the technical field of rearview mirror spray-painted part molds, and in particular to a gate insert structure for rearview mirror spray-painted parts. Background Art

[0002] The manufacture of rearview mirror spray parts usually requires the use of mold casting plastic. During casting, the plastic temperature is high and in order to meet production efficiency, the plastic enters the mold cavity quickly, so that the air in the mold cavity does not have time to be discharged, which can easily cause air marks on the finished rearview mirror spray parts, affecting the yield of the rearview mirror spray parts.

[0003] In order to solve the above problems, a gate insert structure is usually provided on the mold to connect the molding mold and the metal accessories of the injection molding machine, which can control the flow direction and speed of the plastic and reduce the phenomenon of gas lines in the finished product. The gate insert structure in the related art includes a boss arranged in the gate groove of the mold and a matching platform fixedly connected to the boss. The matching platform is located in the positioning groove of the mold. A connecting hole connected to the injection port of the mold is provided downward on the top of the boss. The fluid plastic is injected into the gate groove of the mold. The fluid plastic slowly flows over the top of the boss and flows into the injection port of the mold through the connecting hole. The boss increases the resistance of the plastic flow channel, plays a role in buffering injection molding, and reduces the phenomenon of gas lines in the finished product.

[0004] As the requirements for production efficiency become higher and higher, the efficiency of injection molding must also be improved accordingly. The current gate casting structure is difficult to meet the current injection molding needs, and the surface of the generated rearview mirror spray parts still has air marks. Utility Model Content

[0005] In order to reduce the defect of air marks on the surface of injection-molded rearview mirror spray parts, the present application provides a gate insert structure for rearview mirror spray parts.

[0006] The invention provides a gate insert structure for a rearview mirror spraying part, which adopts the following technical solution:

[0007] A gate insert structure for a rearview mirror spray part comprises a boss arranged in a mold gate groove and a matching platform integrally formed with the boss, the matching platform being located in the mold positioning groove, a first connecting hole being arranged downwardly on the top of the boss, an elevated platform being arranged below the boss and the matching platform, a portion of the elevated platform being located in the mold gate groove and another portion being located in the mold positioning groove, a space being left between the elevated platform located in the gate groove and the inner wall of the gate groove, a second connecting hole being arranged downwardly on the top of the elevated platform and connected to the first connecting hole, and the second connecting hole being connected to the mold injection hole.

[0008] By adopting the above-mentioned technical solution, the present application sets a raising platform to raise the boss and the matching platform as a whole, thereby raising the entrance of the first connecting hole, further increasing the flow resistance of the plastic flow channel, reducing the flow rate of the plastic fluid, reducing the phenomenon of air marks on the surface of the injection-molded rearview mirror spray parts, and improving the yield rate.

[0009] Optionally, the heightening platform, the boss and the matching platform are all arranged vertically in equal parts along the center of the injection hole of the mold.

[0010] By adopting the above technical solution, the raising platform, the boss and the matching platform are all arranged vertically in half along the center of the injection hole of the mold, which is convenient for processing the first connecting hole and the first connecting hole, and also convenient for subsequent cleaning of the first connecting hole and the first connecting hole.

[0011] Optionally, the first connecting hole and the second connecting hole form an arc-shaped injection channel in the shape of a "bull horn".

[0012] By adopting the above technical solution, the first connecting hole and the second connecting hole form an arc-shaped injection channel in the shape of a "bull horn", which prevents the plastic fluid from directly rushing into the mold cavity, reduces the impact of the plastic fluid, and improves the quality of the finished product.

[0013] Optionally, the raising platform located in the mold positioning groove is adapted to the mold positioning groove.

[0014] By adopting the above technical solution, the heightening platform is adapted to the positioning groove, reducing the possibility of fluid plastic flowing into the positioning groove, thereby reducing the possibility of the heightening platform being bonded in the positioning groove. In addition, the positioning groove also positions the heightening platform to prevent the heightening platform from deviating from its position.

[0015] Optionally, a sealing strip is provided at the connection between the raising platform and the boss.

[0016] By adopting the above technical solution, the sealing strip can prevent fluid plastic from entering the gap between the raised platform and the boss, avoiding the raised platform and the boss from sticking together, which is conducive to separating the raised platform and the boss, thereby facilitating the cleaning of the raised platform and the boss separately.

[0017] Optionally, the heightening platform abuts against the boss and the matching platform respectively.

[0018] By adopting the above technical solution, the heightening platform is respectively abutted against the boss and the matching platform, so that it is convenient to replace the heightening platform with different heights according to the situation.

[0019] Optionally, the raising platform, the boss and the matching platform are all made of stainless steel.

[0020] By adopting the above technical solution, the heightening platform, the boss and the matching platform are all made of stainless steel material, which is heat-resistant and aging-resistant, stable, and conducive to the heat dissipation of plastics.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The present application provides a heightening platform to raise the boss and the matching platform as a whole, thereby raising the entrance of the first connecting hole, further increasing the flow resistance of the plastic flow channel, reducing the flow rate of the plastic fluid, reducing the phenomenon of air marks on the surface of the injection-molded rearview mirror spray part, and improving the yield rate;

[0023] 2. The first connecting hole and the second connecting hole form an arc-shaped injection channel in the shape of a "horn", which prevents the plastic fluid from directly rushing into the mold cavity, slows down the impact of the plastic fluid, and improves the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 2 is a schematic diagram showing the structure of the heightening platform in an embodiment of the present application;

[0026] Figure 3 It is a structural schematic diagram showing the arc-shaped injection channel according to an embodiment of the present application.

[0027] In the figure, 1, boss; 11, first connecting hole; 2, matching platform; 3, heightening platform; 31, second connecting hole. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] An embodiment of the present application discloses a gate insert structure for a rearview mirror spray-painted part.

[0030] like Figure 1 and Figure 2 As shown, a gate insert structure of a rearview mirror spraying part includes a boss 1 arranged in a mold gate groove and a matching platform 2 integrally formed with the side wall of the boss 1, the matching platform 2 is located in the mold positioning groove and the matching platform 2 is adapted to the mold positioning groove, a first connecting hole 11 is downwardly provided on the top of the boss 1, and a raised platform 3 is abutted below the boss 1 and the matching platform 2 at the same time, a part of the raised platform 3 is located in the mold gate groove, and the other part is located in the mold positioning groove, the raised platform 3 located in the mold positioning groove is adapted to the mold positioning groove, and a space is left between the raised platform 3 located in the gate groove and the vertical inner wall of the gate groove, as shown in FIG. Figure 2 and Figure 3 As shown, a second connecting hole 31 communicating with the first connecting hole 11 is provided downwardly on the top of the elevated platform 3 , and the second connecting hole 31 is connected with the injection hole of the mold.

[0031] The present application provides a raising platform 3 to raise the boss 1 and the matching platform 2 as a whole, thereby raising the entrance of the first connecting hole 11, further increasing the flow resistance of the plastic flow channel, further reducing the flow rate of the plastic fluid, reducing the phenomenon of air marks on the surface of the injection-molded rearview mirror spray part, and improving the yield rate; in addition, the raising platform 3 is adapted to the mold positioning groove, on the one hand, to reduce the possibility of fluid plastic flowing into the mold positioning groove, and on the other hand, to facilitate the positioning groove to position the raising platform 3 to prevent the raising platform 3 from deviating from its position.

[0032] like Figure 2 and Figure 3 As shown, the first connecting hole 11 and the second connecting hole 31 form an arc-shaped injection channel in the shape of a "horn", which prevents the plastic fluid from directly rushing into the mold cavity, mitigates the impact of the plastic fluid, and further improves the quality of the finished product.

[0033] like Figure 2 and Figure 3 As shown, the raising platform 3, the boss 1 and the matching platform 2 are all arranged vertically in half along the center of the injection hole of the mold, which is convenient for processing the first connecting hole 11 and the first connecting hole 11, and also convenient for subsequent cleaning of the first connecting hole 11 and the first connecting hole 11.

[0034] A sealing strip (not shown in the figure) is provided at the connection between the raising platform 3 and the boss 1. The sealing strip can prevent the fluid plastic from entering the gap between the raising platform 3 and the boss 1, avoid the raising platform 3 and the boss 1 from sticking together, and is conducive to separating the raising platform 3 and the boss 1, thereby facilitating the cleaning of the raising platform 3 and the boss 1 separately.

[0035] The heightening platform 3, the boss 1 and the matching platform 2 are all made of stainless steel material, which is heat-resistant and aging-resistant, has good stability, and is conducive to the heat dissipation of plastics.

[0036] The implementation principle of a gate insert structure of a rearview mirror spray part in an embodiment of the present application is as follows: the present application raises the boss 1 and the matching platform 2 as a whole by setting a raising platform 3, thereby raising the entrance of the first connecting hole 11, further increasing the flow resistance of the plastic flow channel, further reducing the flow rate of the plastic fluid, reducing the phenomenon of air marks on the surface of the injection-molded rearview mirror spray part, and improving the yield; the first connecting hole 11 and the second connecting hole 31 in the present application form an arc-shaped injection channel in the shape of a "bull horn", which prevents the plastic fluid from directly rushing into the mold cavity, reduces the impact of the plastic fluid, and further improves the quality of the finished product.

[0037] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gate insert structure for a rearview mirror spraying part, comprising a boss (1) arranged in a mold gate groove and a matching platform (2) integrally formed with the boss (1), wherein the matching platform (2) is located in the mold positioning groove, and a first connecting hole (11) is arranged downward at the top of the boss (1), characterized in that: A raised platform (3) is provided below the boss (1) and the matching platform (2); a portion of the raised platform (3) is located in the mold gate groove, and another portion is located in the mold positioning groove; a space is left between the raised platform (3) located in the gate groove and the inner wall of the gate groove; a second connecting hole (31) connected to the first connecting hole (11) is provided downwardly at the top of the raised platform (3); and the second connecting hole (31) is connected to the mold injection hole.

2. A gate insert structure for a rearview mirror spraying part according to claim 1, characterized in that: The heightening platform (3), the boss (1) and the matching platform (2) are all arranged vertically in equal parts along the center of the injection hole of the mold.

3. The gate insert structure of a rearview mirror spraying part according to claim 1, characterized in that: The first connecting hole (11) and the second connecting hole (31) form an arc-shaped injection channel in the shape of a bull horn.

4. The gate insert structure of a rearview mirror spraying part according to claim 1, characterized in that: The heightening platform (3) located in the mold positioning groove is adapted to the mold positioning groove.

5. The gate insert structure of a rearview mirror spraying part according to claim 1, characterized in that: A sealing strip is provided at the connection between the raised platform (3) and the boss (1).

6. The gate insert structure of a rearview mirror spraying part according to claim 1, characterized in that: The heightening platform (3) is respectively in contact with the boss (1) and the matching platform (2).

7. The gate insert structure of a rearview mirror spraying part according to claim 1, characterized in that: The heightening platform (3), the boss (1) and the matching platform (2) are all made of stainless steel.

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