Method for eliminating bubbles of polyurethane (PU) injection moulding corner and obtained glass window

A glass window and bubble technology, applied in the coating and other directions, can solve the problems of high cost, long time consumption and ineffective effect of the exhaust groove, and achieve the effect of solving the bubble problem and simple operation method.

Active Publication Date: 2011-09-14
FUYAO GLASS IND GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the appearance of the current product, the opening of the exhaust groove does not solve the problem of air bubbles in the corner of the material flow. It only achieves the principle of proper exhaust by connecting the inside and outside of the wrapping
In addition, the opening of the exhaust groove is not only costly and time-consuming, but also the effect is not significant

Method used

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  • Method for eliminating bubbles of polyurethane (PU) injection moulding corner and obtained glass window
  • Method for eliminating bubbles of polyurethane (PU) injection moulding corner and obtained glass window
  • Method for eliminating bubbles of polyurethane (PU) injection moulding corner and obtained glass window

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Present embodiment 1 is a three-bread type hemming process, and the specific steps are:

[0033] 1. Pretreatment: Clean the edge area of ​​the glass plate 8, then apply the activator on the upper and lower surfaces and sides of the edge of the glass plate 8, leave it for 15 minutes, and then apply a primer on the area coated with the activator on the edge of the glass plate 8, Leave it for 30-240 minutes;

[0034] 2. Apply adhesive to the bottom surface of the insert 7, and then position and adhere the insert 7 to the corresponding position of the corner of the glass plate. The insert 7 is a three-dimensional triangular block, such as figure 1 As shown, its vertex 71 corresponds to the radian at the corner of the glass plate 8, the two sides of the vertex 71 are parallel to the two sides of the corner of the glass plate 8, and the distance between them is 2 mm, and the insert 7 also meets the following conditions : when the glass plate 8 edge portion and the insert 7 a...

Embodiment 2

[0040] Present embodiment 2 is the two-bread type hemming process, and the specific steps are:

[0041] 1. Pretreatment: Clean the edge area of ​​the glass plate 8, then apply the activator on the side of the glass plate 8 edge and the other connecting surface, leave it for 15 minutes, and then apply the activator on the area coated with the activator on the edge of the glass plate 8 Primer, leave for 30-240 minutes;

[0042] 2. Apply adhesive to the bottom surface of the insert 7, and then position and adhere the insert 7 to the corresponding position of the corner of the glass plate 8. The insert 7 is a three-dimensional triangular block, such as image 3 As shown, its vertex 71 corresponds to the radian at the corner of the glass plate 8, the two sides of the vertex 71 are parallel to the two sides of the corner of the glass plate 8, and the distance between them is 5 mm, and the insert 7 also meets the following conditions 1. There are two through grooves 72 that correspo...

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Abstract

The invention relates to a method for eliminating bubbles of a polyurethane (PU) injection moulding corner and an obtained glass window and belongs to the field of injection moulding, in particular to the field of moulding of PU reaction injection moulding coated edges. The method comprises the steps of cleaning a glass plate and coating a prime coat and is characterized in that: prior to injection moulding, an insert is glued at a peripheral corner of the glass plate; the insert is a triangular block; when positioned in a mould, an edge part of the glass plate and the insert form a corner runner with a mould cavity of the mould; and the sectional area of the corner runner containing the insert is the same as the sectional area of the runner of adjacent spaces in front of or behind the corner, or different from the sectional area by 10 percent or less. The invention has the advantages that: the method is simple in operation, the problem of bubble generation during the injection moulding of PU resins can be effectively solved, and a neat and elegant PU edge-coated glass window can be obtained.

Description

【Technical field】 [0001] The invention relates to the field of injection molding, in particular to the field of PU reaction injection molding and wrapping molding. 【Background technique】 [0002] With the leapfrog development of global science and technology, the automobile industry, one of the representatives of technological power, has also made great progress, and automobile edge glass is a very important part of it, and people naturally put forward higher and more stringent technical requirements for it. . Edged glass in automotive glass, especially PU reaction injection molding (RIM) edged glass has low pressure, low energy consumption, high product design flexibility, short molding cycle, strong adaptability and superior product quality in terms of overall performance. And other characteristics, which greatly meet the step-by-step demand of different customers for the supply and demand of automotive glass production. [0003] At present, PU reaction injection molding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/17
Inventor 刘贤平章武庄国珍陈锋苏鸣
Owner FUYAO GLASS IND GROUP CO LTD
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