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Hot-moulding foaming process for producing seats made of polyurethane

A technology of polyurethane foam and thermal molding, which is applied in the direction of household components, applications, household appliances, etc., can solve the problem of high labor intensity, achieve the effect of blocking spillage and reducing size

Inactive Publication Date: 2007-01-31
SHANGHAIK YANFENG JINQIAO AUTOMOTIVE TRIM SYSTEMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, during the production process, the "mushroom heads" are manually removed by workers, which is very labor-intensive

Method used

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  • Hot-moulding foaming process for producing seats made of polyurethane
  • Hot-moulding foaming process for producing seats made of polyurethane
  • Hot-moulding foaming process for producing seats made of polyurethane

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples.

[0014] Such as figure 1 As shown, an air outlet 3 with the same height as the wall thickness of the upper cover mold is provided between the outer layer 1 of the upper cover mold and the inner layer 2 of the upper cover mold in the thermal molding foaming mold of the seat. During the process, a layer of polyurethane foam sheet 4 is covered on the surface of the inner layer 2 of the upper cover mold with air outlet holes 3 . The foam sheet can be used not only to vent air, but also to effectively block the overflow of foam, reduce the amount and size of "mushroom heads", and the resulting "mushroom heads" only account for less than the input amount of raw materials. 2%, and the maximum size of the "mushroom head" does not exceed 10mm, which effectively reduces the consumption of raw materials. After forming, the thin sheet is pasted on ...

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Abstract

A hot moulding-foaming technology for preparing the polyurethane seat is characterized by that the polyurethane foam sheet is used to cover the internal layer of upper mould and after it is shaped, it is stuck on the back of hot-foamed seat product, resulting in high air permeability, less generation of 'mushroom heads' and less consumption of raw material.

Description

technical field [0001] The invention relates to a thermal molding foaming process of a polyurethane seat, in particular to a thermal molding foaming outgassing process which can reduce raw material consumption during the seat thermal molding foaming process. Background technique [0002] Polyurethane thermal molding foaming process consists of polyether composite material and isocyanate composite material colliding between molecules under high pressure in a mixing head, pouring the mixed material into a mold, and finally forming a molded part through the process of outgassing and high-temperature curing. For decades, in the traditional seat thermal molding foaming process, in order to prevent the generation of defects such as seat foam core bubbles, generally 150 to 200 air outlet holes are opened on the upper cover mold of the mold to vent the air. The vent structure is shown in Figure 3. The air outlet hole 13 is located between the outer layer 11 of the upper cover mold ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/02B29C44/34B29K75/00B29L31/44
Inventor 崔建玲
Owner SHANGHAIK YANFENG JINQIAO AUTOMOTIVE TRIM SYSTEMS CO LTD