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Set-top box and preparation method thereof

A set-top box and outer surface technology, applied in the direction of cooling/ventilation/heating transformation, electrical components, selective content distribution, etc., can solve problems such as complex molds, achieve the effects of optimizing production processing, simplifying mold structure, and beautiful products

Inactive Publication Date: 2014-04-09
SHENZHEN JIUZHOU ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a set-top box with low manufacturing cost and good heat dissipation effect and its preparation method in view of the above-mentioned defects that the mold used for the inner surface pouring in the prior art is relatively complicated.

Method used

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  • Set-top box and preparation method thereof
  • Set-top box and preparation method thereof
  • Set-top box and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for preparing a set-top box, the steps are as follows:

[0050] S1, use as image 3 The special mold with a central gate shown, the special mold includes an upper mold 101 for preparing the body 1 and a lower mold 102 for preparing the cover 2 that cooperate with each other, and the upper mold 101 includes an upper horizontal caster arranged in a horizontal direction. The channel 103 and the vertical upper gate 105 communicating with the upper runner 103, the upper runner 103 communicates with the upper cavity 107 through the upper gate 105; the lower mold 102 includes a lower runner arranged in the horizontal direction 108 and a vertical lower gate 109 communicating with the lower runner 108, and the lower runner 108 communicates with the lower cavity 110 through the lower gate 109;

[0051] S2, heating the upper mold 101 and the lower mold 102 to a working temperature of 75°C-85°C, which is preferably 80°C in this embodiment;

[0052] S3. Heat the ABS raw material...

Embodiment 2

[0064] The method steps of this method embodiment are the same as the method steps of method embodiment 1, and will not be repeated here. The difference is that the working temperature of the mold is 75°C. If it is less than 75°C, the rapid cooling caused by the injection of the ABS raw material into the upper and lower molds of the mold will not facilitate the flow of the raw materials, which will also adversely affect the filling. Correspondingly, the temperature of ABS is 220°C, in order to reduce the temperature difference between ABS and the mold, and the filling pressure needs to be set to 140MPa to promote the rapid flow of ABS. Under a filling pressure of 140 MPa, the height of the upper gate step 106 and the lower gate step 111 needs to be set to 1.5 mm to ensure the strength at the pouring point and the fluidity of the plastic.

Embodiment 3

[0066] The method steps of this method embodiment are the same as the method steps of method embodiment 1, and will not be repeated here. The difference is that the working temperature of the mold is 85°C. If it is greater than 85°C, the strength of the mold will decrease and may not be able to withstand the impact of injection molding. At this time, the ABS material needs to be heated to a temperature of 250°C and the filling pressure is as small as possible. The filling pressure is 100MPa to promote the normal flow of raw materials. Under 100 MPa, the height of the upper gate step 106 and the lower gate step 111 only needs to be set to 1.0 mm to ensure the strength at the pouring point and the fluidity of the plastic.

[0067] By setting the center gate on the front mold, the present invention makes full use of the advantages of the center gate, and adopts beautification methods to optimize the appearance of the product after the molding is completed; the special mold used has ...

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Abstract

The invention relates to a set-top box and a preparation method thereof. The set-top box includes a body with an accommodating space and a cover body which covers the body and is used for closing the accommodating space; the body is provided with a first outer surface; the cover body is provided with a second outer surface; the first outer surface and the second outer surface are arranged back to back; the central area of the first outer surface and / or the second outer surface is provided with a pouring entering opening which is formed in molding; and a plurality of heat dissipation holes which are communicated with the accommodating space are formed around the pouring entering opening. The invention also relates to a preparation method of the set-top box. According to the set-top box and the preparation method thereof of the invention, the array-shaped heat dissipation holes are formed around the pouring entering opening, and welding wires are covered through a surface texture etching technology, and therefore, the product can have a beautiful appearance, and the structure of required moulds can be greatly simplified, and production processing can be optimized, and cost for the moulds can be reduced, and unit cost of the product can be eventually decreased.

Description

Technical field [0001] The invention relates to the field of injection molding, in particular to a set-top box and a preparation method thereof. Background technique [0002] Most of the plastic set-top box molding process requires plastic molding and processing into various semi-finished products or parts. Injection molding is one of the main molding methods for plastic parts. Injection molding must be completed with the help of molding equipment such as injection molding machines and injection molds. In this injection molding process, the selection and application of the gate have an important influence on the appearance of the product and the weld line. [0003] Among them, the form and position of the gate not only have a great impact on the molding speed and quality of plastic products, but also affect the final quality of the entire product. [0004] The gate inlet of plastic set-top box products during the injection molding process has an impact on the following aspects: [0...

Claims

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Application Information

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IPC IPC(8): H04N21/41H05K7/20B29C45/26B29C45/27B29C45/76
Inventor 管凌
Owner SHENZHEN JIUZHOU ELECTRIC
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