Mirror chamber product and injection mold and manufacturing method thereof

Abstract

The invention provides a mirror chamber product as well as an injection mold and a manufacturing method thereof. The injection mold for the mirror chamber product comprises a bushing and an insert core, a penetrating channel is formed in the axis of the lining, and the insert core penetrates through the penetrating channel; a cavity is formed in the top of the bushing; the shape of the cavity is matched with that of a mirror chamber product, and the cavity is used for bearing an injection molding material; wherein the bottom of the cavity is provided with a flush joint part and an inclined plane part; the butt joint part and the inclined plane part are coaxially arranged, the inclined plane part is located on the inner side of the butt joint part, and the inclined plane part is formed by obliquely and smoothly extending upwards towards the axis from the inner side of the butt joint part in the radial direction of the butt joint part. According to the scheme, smooth transition of a straight step, an inclined surface part and a flat connecting part in an existing mold is omitted, so that coating steam can completely and uniformly cover a connecting surface, the problem of'gold edge 'of an opening part after black plating is solved, and the product yield is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mirror chamber product processing, and in particular to a mirror chamber product and an injection mold and a manufacturing method thereof. Background Art

[0002] As a kind of mirror chamber product, the lens barrel is used to install the lens and is an important component of the lens module. Coating is the process of spraying steam from the coating machine and adhering to the surface to form a film layer to eliminate surface reflection. In order to facilitate assembly and exhaust, the head of the existing mirror chamber products is generally designed with a platform with a width of 0.03mm and a depth of 0.03mm. Due to the existence of the straight step, the coating steam cannot completely and evenly cover the connection surface, so a "golden edge" phenomenon is formed. Figure 2 The "gold edge" phenomenon shown in the figure leads to defective products and a high scrap rate. The current solution to this problem in the industry is secondary or tertiary coating, but it cannot be completely eradicated and multiple coatings are costly.

[0003] In addition, when assembling the bushing and the insert, the existing injection molding mold structure will intentionally leave a gap of 0.006~0.01mm to facilitate the discharge of gas generated when the plastic decomposes, but there is a risk of overflowing glue during exhaust.

[0004] Based on this, the present invention proposes a new mirror chamber product and its injection mold and manufacturing method. Summary of the invention

[0005] Based on the above description, the present invention provides a mirror chamber product and its manufacturing method and injection mold to solve the problem that mirror chamber products manufactured by existing injection molds form "gold edges" during coating, and provides a new injection mold to manufacture mirror chamber products with corresponding structures that avoid the formation of "gold edges".

[0006] The technical solution of the present invention to solve the above technical problems is as follows: In a first aspect, the present invention provides an injection mold for a mirror chamber product, comprising: a bushing and an insert; A through passage is provided at the axis of the bushing, and the insert is provided through the through passage; A cavity is provided on the top of the bushing; the shape of the cavity is adapted to the shape of the mirror chamber product, and the cavity is used to carry the injection molding material; Among them, the bottom of the cavity is a flat joint part and an inclined part; the flat joint part and the inclined part are coaxially arranged, and the inclined part is located on the inner side of the flat joint part, and the inclined part is formed by extending upward and smoothly along the radial direction of the flat joint part toward the axis from the inner side of the flat joint part.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a gap is provided between the side wall of the through channel and the inlet.

[0009] Furthermore, a gap between the side wall of the through channel and the inlet is 8 μm to 12 μm.

[0010] Further, the bushing includes a base and a mold body; The mold body is vertically arranged on the base; the through channel is arranged at the axis of the mold body and the base.

[0011] Furthermore, a slope is provided on the edge of the head of the insert.

[0012] Furthermore, when the bushing and the insert are assembled, the edge line of the insert bevel is flush with the inner edge line of the bevel portion of the bushing, or the edge line of the insert bevel is no higher than the inner edge line of the bevel portion by no more than 5 μm.

[0013] Furthermore, a step portion is provided in the cavity; The step portion is arranged around the outer side of the flat portion.

[0014] Furthermore, a groove is provided on the outer wall side of the cavity; The two grooves are symmetrically arranged, and the bottom of any one of the grooves is sloped outwards.

[0015] In a second aspect, the present invention provides a method for manufacturing a mirror chamber product using the injection mold of the mirror chamber product according to the first aspect, comprising the following steps: The insert is inserted from the bottom of the bushing into the through-channel to the cavity forming the top of the bushing; wherein the gap between the side wall of the through-channel and the insert is 8 μm to 12 μm, the edge line of the insert bevel is flush with the inner edge line of the bevel portion of the bushing, or the edge line of the insert bevel is not more than 5 μm higher than the inner edge line of the bevel portion; The molten plastic material is injected into the cavity at the top of the bushing by an external injection molding machine until the molten plastic material fills the cavity, and the injection molding machine is stopped to allow the plastic material to cool and form in the cavity to obtain a mirror chamber product.

[0016] In a third aspect, the present invention provides a mirror chamber product, which is manufactured according to the manufacturing method of the mirror chamber product in the second aspect.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The injection mold of the mirror chamber product provided by the present invention includes a bushing and an insert; a through channel is provided at the axis of the bushing, and the insert is provided in the through channel; a cavity is provided at the top of the bushing; the shape of the cavity is adapted to the shape of the mirror chamber product, and the cavity is used to carry the injection molding material; wherein the bottom of the cavity is a flat joint and an inclined portion; the flat joint and the inclined portion are coaxially arranged, and the inclined portion is located on the inner side of the flat joint, and the inclined portion is arranged and formed by extending and tilting upwards and smoothly toward the axis from the inner side of the flat joint along the radial direction of the flat joint. Compared with the existing method, this scheme has the following advantages: This solution eliminates the straight steps in the existing mold, and allows for a smooth transition between the inclined and flat parts, allowing the coating vapor to completely and evenly cover the connection surface, solving the problem of "gold edge" at the mouth after black plating and improving product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of an injection mold for a mirror chamber product provided by an embodiment of the present invention; Figure 2 A schematic diagram of the exploded structure of an injection mold for a mirror chamber product provided in an embodiment of the present invention; Figure 3 A schematic cross-sectional structure diagram of an injection mold for a mirror chamber product provided by an embodiment of the present invention; Figure 4 This is a schematic diagram of the effect of the mirror chamber head after coating provided in the prior art; Figure 5 A schematic diagram of the effect of coating the head of a mirror chamber product provided by an embodiment of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Bushing; 11. Cavity; 12. Flat joint; 13. Inclined portion; 14. Base; 15. Mold body; 16. Step portion; 17. Groove; 18. Through passage; 2. Enter; 21. Slope. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The following is combined with Figures 1 to 5 The embodiments of the present invention are further described in detail with examples. The following examples are used to illustrate the present invention but cannot be used to limit the scope of the present invention.

[0022] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an injection mold for a mirror chamber product, including: a bushing 1 and an insert 2.

[0023] A through passage 18 is provided at the axis of the bushing 1 , and the insert 2 is inserted into the through passage 18 .

[0024] Specifically, the bushing 1 includes a base 14 and a mold body 15 ; the mold body 15 is vertically arranged on the base 14 ; and the through channel 18 is arranged at the axis of the mold body 15 and the base 14 .

[0025] A cavity 11 is provided on the top of the bushing 1 ; the shape of the cavity 11 matches the shape of the mirror chamber product, and the cavity 11 is used to carry the injection molding material.

[0026] Among them, the bottom of the cavity 11 is a flat portion 12 and a sloped portion 13; the flat portion 12 and the sloped portion 13 are coaxially arranged, and the sloped portion 13 is located on the inner side of the flat portion 12, and the sloped portion 13 is arranged to extend smoothly and obliquely upward from the inner side of the flat portion 12 along the radial direction of the flat portion 12 toward the axis.

[0027] The inclined portion 13 and the flat portion 12 can be directly flattened using a rounded transition with a radius of R0.1.

[0028] In an optional embodiment, a gap is provided between the side wall of the through channel 18 and the inlet 2 .

[0029] Preferably, the gap between the side wall of the through channel 18 and the inlet 2 is 8 μm to 12 μm, which can effectively avoid glue overflow during the injection molding process and also avoid the growth of burrs.

[0030] Further, such as Figure 3 As shown, a slope 21 is provided at the head edge of the insert 2.

[0031] When the bushing 1 and the insert 2 are assembled, the chamfered edge of the insert 2 is flush with the inner edge of the chamfered portion 13 of the bushing 1, or the chamfered edge of the insert 2 is not more than 5 μm higher than the inner edge of the chamfered portion 13.

[0032] This structure moves the exhaust of the inlet 2 upward to the mouth so that the large inclined surface of the mouth is integrated with the bushing 1, which effectively avoids the vertical surface of the mouth and solves the problem of the coating vapor not being able to adhere. In actual operation, the problem of poor coating has been completely solved in the batches produced.

[0033] Among them, it should be noted that: the structural point of the bushing 1 is that the height of the side wall of the bushing 1 cavity 11 must be accurate and the deviation must not exceed 5μm; the structural point of the head of the insert 2 is that the height deviation during the head bevel grinding machine processing must not exceed 0.003μm.

[0034] Furthermore, in an optional embodiment, a step portion 16 is provided in the cavity 11 ; the step portion 16 is arranged around the outer side of the flat portion 12 .

[0035] like Figure 1 As shown, a groove 17 is provided on the outer wall side of the cavity 11 ; the two grooves 17 are symmetrically arranged, and the bottom of any groove 17 is in a slope 21 outward.

[0036] In order to better explain the injection mold of the mirror chamber product provided in the embodiment of the present invention, a method for manufacturing the mirror chamber product using the injection mold is provided below.

[0037] The specific steps are as follows: Step S1: insert the insert 2 from the bottom of the bushing 1 into the through channel 18 and penetrate it to the cavity 11 forming the top of the bushing 1; wherein, the gap between the side wall of the through channel 18 and the insert 2 is 8μm~12μm, and the bevel edge line of the insert 2 is flush with the inner edge line of the bevel portion 13 of the bushing 1, or the bevel edge line of the insert 2 is not more than 5μm higher than the inner edge line of the bevel portion 13.

[0038] Step S2: inject molten plastic material into the cavity 11 at the top of the bushing 1 through an external injection molding machine until the molten plastic material fills the cavity 11, and then stop the injection molding machine to allow the plastic material to cool and form in the cavity 11. Finally, a mirror chamber product is obtained.

[0039] In summary, compared with the prior art, this embodiment can achieve the following technical effects: The embodiment of the present invention eliminates the straight body step in the existing mold, and the inclined surface 13 and the flat joint 12 have a smooth transition, so that the coating vapor can completely and evenly cover the connection surface, solving the problem of "gold edge" at the mouth after black plating. The schematic diagram of the effect of the head of the mirror chamber product after coating is shown as follows: Figure 5 As shown, compared to Figure 4It can be seen that there is no "gold edge" problem, which means that the coating vapor can completely and evenly cover the connection surface; at the same time, through the cooperation of the bushing 1 and the insert 2, the problem of glue overflow and burr can be avoided during the exhaust process, thereby effectively improving the product yield.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An injection mold for a mirror chamber product, characterized in that: include: Bushings and inserts; A through passage is provided at the axis of the bushing, and the insert is provided through the through passage; A cavity is provided on the top of the bushing; the shape of the cavity is adapted to the shape of the mirror chamber product, and the cavity is used to carry the injection molding material; Among them, the bottom of the cavity is a flat joint part and an inclined part; the flat joint part and the inclined part are coaxially arranged, and the inclined part is located on the inner side of the flat joint part, and the inclined part is formed by extending upward and smoothly along the radial direction of the flat joint part toward the axis from the inner side of the flat joint part.

2. The injection mold for the mirror chamber product according to claim 1, characterized in that: A gap is provided between the side wall of the through channel and the inlet.

3. The injection mold for the mirror chamber product according to claim 2, characterized in that: The gap between the side wall of the through channel and the inlet is 8 μm to 12 μm.

4. The injection mold for the mirror chamber product according to claim 1, characterized in that: The bushing includes a base and a mold body; The mold body is vertically arranged on the base; the through channel is arranged at the axis of the mold body and the base.

5. The injection mold for the mirror chamber product according to claim 1, characterized in that: The head edge of the insert is provided with a slope.

6. The injection mold for the mirror chamber product according to claim 1, characterized in that: When the bushing and the insert are assembled, the chamfered edge line of the insert is flush with the inner edge line of the chamfered portion of the bushing, or the chamfered edge line of the insert is not more than 5 μm higher than the inner edge line of the chamfered portion.

7. The injection mold for the mirror chamber product according to claim 1, characterized in that: A step portion is provided in the cavity; The step portion is arranged around the outer side of the flat portion.

8. The injection mold for the mirror chamber product according to claim 1, characterized in that: A groove is provided on the outer wall side of the cavity; The two grooves are symmetrically arranged, and the bottom of any one of the grooves is sloped outwards.

9. A method for manufacturing a mirror chamber product using the injection mold for the mirror chamber product according to any one of claims 1 to 8, characterized in that: The steps include: The insert is inserted from the bottom of the bushing into the through-channel to the cavity forming the top of the bushing; wherein the gap between the side wall of the through-channel and the insert is 8 μm to 12 μm, the edge line of the insert bevel is flush with the inner edge line of the bevel portion of the bushing, or the edge line of the insert bevel is not more than 5 μm higher than the inner edge line of the bevel portion; The molten plastic material is injected into the cavity at the top of the bushing by an external injection molding machine until the molten plastic material fills the cavity, and the injection molding machine is stopped to allow the plastic material to cool and form in the cavity to obtain a mirror chamber product.

10. A mirror chamber product, characterized in that: The mirror chamber product is manufactured according to the manufacturing method of the mirror chamber product according to claim 9.

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