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Injection molding process for ultrahigh-flatness liquid crystal screen supporting panel

An injection molding process and a technology for supporting panels, which are applied to flat products, household appliances, and other household appliances, can solve problems that cannot be completely eliminated, and achieve high pass rate, guaranteed sealing, and low cost and energy consumption.

Inactive Publication Date: 2019-11-22
江阴市羽项汽车饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flatness of the injection molded panel will always affect the mura of the LCD (that is, the uneven brightness of the display, causing various traces), which can only reduce the level under the ND filter test, and cannot be completely eliminated. Therefore, we propose Injection molding process of support panel for ultra-high flatness liquid crystal screen

Method used

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  • Injection molding process for ultrahigh-flatness liquid crystal screen supporting panel
  • Injection molding process for ultrahigh-flatness liquid crystal screen supporting panel
  • Injection molding process for ultrahigh-flatness liquid crystal screen supporting panel

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Effect test

Embodiment 1

[0037] see Figure 1-12 , the present invention provides a technical solution: an ultra-high flatness liquid crystal screen support panel injection molding process, including an ultra-high flatness liquid crystal screen support panel injection molding process, the process includes the following steps:

[0038] The first step: in the composite material drying stage, the PC and ABS composite materials are dried;

[0039] The second step: in the melting stage, the dried composite material is fed into the injection molding machine;

[0040] Step 3: In the temperature control stage of mold processing, the fixed mold 1 of the mold is connected to the refrigerator 2, the movable mold 2 of the mold is connected to the oil temperature controller, and the sliders 3 on both sides of the fixed mold 1 and the movable mold 2 are connected to the water temperature controller;

[0041] Step 4: In the injection molding stage, inject the molten liquid flow from the barrel nozzle of the injecti...

Embodiment 2

[0050] The pipeline connection assembly 7 includes a first connecting pipe 8, a second connecting pipe 9 and a shrinking mechanism 10, and the first connecting pipe 8 and the second connecting pipe 9 are fixedly connected by the shrinking mechanism 10, so The ends of the first connecting pipe 8 and the second connecting pipe 9 far away from the contracting mechanism 10 are provided with a clamping mechanism 11, the first connecting pipe 8 is clamped with the water temperature pipe 6 through the clamping mechanism 11, The end of the second connecting pipe 9 away from the retracting mechanism 10 is engaged with the output end of the water cooler through the engaging mechanism 11 .

[0051] The retraction mechanism 10 includes a retraction rod 12 and a ring spring 13, the ring spring 13 is sleeved on the retraction rod 12, and the two ends of the retraction rod 12 and the ring spring 13 are respectively connected with the first connecting pipe 8 and the One end of the second conn...

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Abstract

The invention discloses an injection molding process for an ultrahigh-flatness liquid crystal screen supporting panel. The process comprises the following steps of composite drying stage: drying a PC-ABS composite; melting stage: feeding the dried composite into an injection molding machine; injection molding stage. In the injection molding process for the ultrahigh-flatness liquid crystal screensupporting panel, for an injection molded part panel, special temperature setting is adopted, a mold fixing mold is connected with a refrigerator with a temperature of a fixed mold being set to be 25DEG C, a mold moving mold is connected with an oil temperature machine with a temperature of a moving mold being set to be 95 DEG C, and sliders on the two sides of the moving mold are connected witha water temperature machine with a temperature of each slider being set to be 60 DEG C, so that cooling speeds of different areas of the injection molding part panel are different, and the deformationquantity of the final injection molding part panel after being completely cooled is controlled to be at a low degree; and in addition, the one-step forming flatness of the PC / ABS material injection molding panel with the area of the positive surface being 390cm^2 is within 0.2mm, secondary processing such as subsequent shaping is not needed, and the injection molding process has the technical characteristics of less surface defects, high qualified rate, low cost, low energy consumption and the like.

Description

technical field [0001] The invention relates to the technical field of injection molding technology for plastic parts, in particular to an injection molding technology for an ultra-high flatness liquid crystal screen support panel. Background technique [0002] In the injection molding production process of the injection molding panel, due to the large area, and the plastic is a material that is heat-shrinkable and deformed, and the inconsistency of the back structure will lead to uneven shrinkage, it is difficult to control the flatness of the panel. Through analysis and improvement, using the design of multiple sets of waterways in the injection mold, the temperature control of the production process of the injection molding panel was carried out, the injection molding process specification was formulated, and finally the flatness of the LCD screen support panel components was controlled within 0.2 mm. However, the flatness of the injection molded panel will always affect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/17B29C45/78B29B13/06B29L7/00
CPCB29B13/06B29C45/17B29C45/78B29C2945/76531B29L2007/002
Inventor 张忠记许斌卢东明许维兵贺军一杨红黄晓丹何婷婷
Owner 江阴市羽项汽车饰件有限公司
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