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Thermal shaping method for structural part containing plastic

A technology for thermal shaping and structural parts, which is applied in the field of material processing, and can solve problems such as the need for improvement in shaping methods, high flatness, and springback

Active Publication Date: 2021-12-17
HUIZHOU BYD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, structural parts containing plastic will be deformed due to factors such as material, structure, thickness, and mold during injection molding or processing, and the flatness is high, which makes it unable to meet the design or assembly requirements. Parts are reshaped to reduce their flatness
In the related art, the shaping method is to use the shaping fixture and directly use the physical force method to deform the structural parts containing plastic to reduce its flatness, but the shaping effect is often not obvious and there is a problem of springback
[0003] Therefore, the existing shaping methods for structural parts containing plastics still need to be improved

Method used

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  • Thermal shaping method for structural part containing plastic
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  • Thermal shaping method for structural part containing plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A thermal shaping method for a structural part containing plastic, comprising: placing the structural part to be thermally shaped in a shaping jig (the shaping jig is a stainless steel mobile phone back shell jig, consisting of upper and lower layers , the upper layer is an inner cavity profiling structure, the lower layer is a back profiling structure, and the structural size accuracy is ±0.02mm); the structural parts in the plastic shaping fixture are preheated and shaped (the preheating temperature is 70°C ; The preheating time is 30min; the preload is 3MPa); the structural parts in the shaping fixture are subjected to heat shaping treatment (the heat shaping temperature is 140°C; the heat shaping time is 40min; the load is 7MPa); The structural member that has undergone the heat shaping treatment is subjected to cooling treatment, and the cooling rate of the cooling treatment is 5K / s (the cooling medium is dry ice; the cooling temperature is -50° C.; the cooling time...

Embodiment 2

[0043] A thermal shaping method for a structural part containing plastic, comprising: placing the structural part to be thermally shaped in a shaping jig (the shaping jig is a stainless steel mobile phone back shell jig, consisting of upper and lower layers , the upper layer is an inner cavity profiling structure, the lower layer is a back profiling structure, and the structural size accuracy is ±0.02mm); the structural parts in the plastic shaping fixture are subjected to heat shaping treatment (the heat shaping temperature is 140°C; The thermal shaping time is 40min; the load is 7MPa); the structural parts that have undergone the thermal shaping treatment are cooled, and the cooling rate of the cooling treatment is 5K / s (the cooling medium is dry ice; the cooling temperature is -50°C ; Cooling time is 10min).

[0044] Table 2 shows the flatness test results of the structural member before and after it is processed by the thermal shaping method.

Embodiment 3

[0046] A thermal shaping method for a structural part containing plastic, comprising: placing the structural part to be thermally shaped in a shaping jig (the shaping jig is a stainless steel mobile phone back shell jig, consisting of upper and lower layers , the upper layer is an inner cavity profiling structure, the lower layer is a back profiling structure, and the structural size accuracy is ±0.02mm); the structural parts in the plastic shaping fixture are preheated and shaped (the preheating temperature is 70°C ; The preheating time is 30min; the preload is 3MPa); the structural parts in the shaping fixture are subjected to heat shaping treatment (the heat shaping temperature is 140°C; the heat shaping time is 40min; the load is 7MPa); The structural member that has undergone the heat shaping treatment is subjected to cooling treatment, and the cooling rate of the cooling treatment is 5K / s (the cooling medium is dry ice; the cooling temperature is -80° C.; the cooling time...

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Abstract

The invention provides a thermal shaping method for a structural part containing plastic. The thermal shaping method comprises the steps that the structural part to be thermally shaped is placed in a shaping jig; the structural part in the shaping jig is subjected to thermal shaping treatment; and the structural part subjected to the thermal shaping treatment is cooled, and the cooling speed of the cooling treatment is not lower than 2K / s. The thermal shaping method is simple in process, convenient, easy to implement and good in shaping effect, the rebound problem is not prone to occurring, shaping can be efficiently, stably and thoroughly achieved, and the structural part treated through the thermal shaping method can well meet the follow-up machining and assembling requirements.

Description

technical field [0001] The present application relates to the technical field of material processing, in particular, to a thermal shaping method for structural parts containing plastic. Background technique [0002] Plastic has the advantages of good corrosion resistance, low cost, light weight and easy molding, and has been widely used in electronics, automobiles, aerospace, machinery and other industries. In the 3C electronics industry, mobile phones, tablet computers, smart watches, etc. all have structural parts containing plastic. However, structural parts containing plastic will be deformed due to factors such as material, structure, thickness, and mold during injection molding or processing, and the flatness is high, which makes it unable to meet the design or assembly requirements. The part is shaped to reduce its flatness. In the related art, the shaping methods all use shaping fixtures and directly deform the structural parts containing plastic to reduce their fl...

Claims

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Application Information

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IPC IPC(8): B29C53/16B29C53/84
CPCB29C53/16B29C53/84
Inventor 黄永河许静林信平
Owner HUIZHOU BYD ELECTRONICS
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