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Vacuum blister forming process and device for regenerated leather skin of automobile instrument panel

A technology for automotive dashboards and vacuum blisters, which is applied to home appliances, other home appliances, and household components. It can solve problems such as complex deformation, tensile strength, elasticity and tear performance gaps, and damage, and achieve optimal molding temperature. and pressure, avoid deformation or disappearance, avoid the effect of rebound deformation

Active Publication Date: 2017-12-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, single-component leather fiber regenerated leather shrinks under heating conditions, and its formability is not good. Currently, it is limited to products without complex geometries, such as furniture, bags, car cushions, computer covers, etc. The dry shrinkage of regenerated leather and Formability issues limit its widespread use in the automotive interior industry
[0004] Different from the molding process of genuine leather fiber regenerated leather products such as bags and car seat cushions, the successful application of this material in the skin of automobile dashboards must solve the following two problems: first, the genuine leather fiber regenerated leather made by non-woven fabric technology, Only cross-linking animal skin fibers by physical and mechanical entanglement, compared with raw leather in terms of tensile strength, elasticity and tear properties, is prone to shrinkage and insufficient molding performance during the molding process And problems such as large springback after product processing; secondly, due to the complex deformation of the automobile instrument panel skin in the process of vacuum blistering, it leads to defects such as product wrinkles, serious thinning or even damage
Bonding thermoplastic synthetic fibers and natural fibers through molding process to prepare automotive interior panels with larger thickness, higher hardness, strength and rigidity. This molding process is not suitable for automotive dashboards that require high flexibility skin; and the amount of thermoplastic synthetic fibers is large, which reduces the effect of green environmental protection

Method used

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  • Vacuum blister forming process and device for regenerated leather skin of automobile instrument panel
  • Vacuum blister forming process and device for regenerated leather skin of automobile instrument panel
  • Vacuum blister forming process and device for regenerated leather skin of automobile instrument panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Evenly mix 4080 fiber and kraft fiber in a certain proportion, wherein the mass fraction of 4080 fiber is 12%. Then the mixed fibers are combed into a net, and then the regenerated leather is produced through 7 spunlace processes.

[0058] (2) Select the positive mold vacuum blister forming method, and uncoil the respective rolls of the regenerated leather (about 1.0mm in thickness) and the PU sheet with a thickness of 0.5mm of prefabricated pattern in (1) through the unfolding station, Among them, the PU sheet is located above the regenerated leather, and is conveyed to the heating station through the conveyor belt, and the regenerated leather and PU sheet are precisely heated by the matrix heating unit.

[0059] (3) When the regenerated leather and PU sheet are transported to the male mold vacuum forming station, first fix the edge of the sheet, and then blow in hot air at 100°C from the bottom of the vacuum forming chamber to make the regenerated leather and PU s...

Embodiment 2

[0065] (1) Evenly mix N720 viscose fiber and kraft fiber in a certain proportion, wherein the mass fraction of thermoplastic synthetic fiber N720 with skin-core structure is 14%. The evenly mixed fibers are air-laid and six needle-punched to produce regenerated leather.

[0066] (2) Select the male mold vacuum blister forming method, and uncoil the respective coils of the regenerated leather (about 1.2mm thick) obtained in (1) and the PU sheet with a thickness of 0.3mm that has been prefabricated. , in which the PU sheet is located above the regenerated leather and conveyed to the heating station through the conveyor chain.

[0067] (3) Accurately heat the regenerated leather and PU sheet that have been transported to the heating station composed of matrix heating units. For the area where the deformation is slightly gentle during subsequent vacuum blister molding, the heating temperature is set to 120 °C; and In the process of vacuum blister forming, the set temperature is 1...

Embodiment 3

[0073] (1) Evenly mix 4080 viscose fiber and kraft fiber in a certain proportion, wherein the mass fraction of 4080 fiber is 15%. The evenly mixed fibers are air-laid into a web, and then subjected to six spunlace processes to produce regenerated leather.

[0074] (2) The obtained regenerated leather sheet is compounded with a layer of thermoplastic PU sheet, the thickness of the PU sheet is about 0.5mm, and the PU sheet does not need to be processed in advance. The rolled composite sheet is conveyed to the unfolding station for uncoiling, in which the PU sheet is located under the regenerated leather, and is conveyed to the heating station through the conveying chain.

[0075] (3) The heating station composed of matrix heating units realizes the precise heating of the composite sheet.

[0076] (4) The heated composite sheet is conveyed to the vacuum blister forming station, and the edge of the sheet is fixed, and hot air is blown from the bottom of the vacuum forming chamber...

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Abstract

The invention provides a vacuum forming technology and device for regenerated leather skin for an automobile instrument panel. The technology comprises the following steps: uniformly mixing thermoplastic synthetic fiber, which adopts a skin-core structure, with real leather fiber, and producing skin-core thermoplastic synthetic fiber mixed regenerated leather for the automobile instrument panel by a non-weaving technology; and during a vacuum forming process, realizing multi-station integrated forming of the regenerated leather skin for the automobile instrument panel by use of the vacuum forming device provided by the invention via the stations of regenerated leather roll spreading, accurate temperature-control heating, formed skin fixing and vacuum forming, regenerated leather scrap reclaiming and the like, thus obtaining the instrument panel skin with excellent service performance and forming performance. The technology provided by the invention is simple, is convenient to operate and has high practicability.

Description

technical field [0001] The invention relates to the field of automobile interior decoration, in particular to a vacuum suction molding process and device for regenerated leather skins of automobile instrument panels. Background technique [0002] With the improvement of people's consumption level and awareness of green environmental protection, consumers have put forward higher requirements for the function, appearance and environmental protection of automobile interiors. At present, except for a small number of genuine leather materials, the automobile dashboard skin mainly adopts synthetic polymer materials such as polyvinyl chloride (PVC) and polyurethane (PU). In recent years, following the call of some European and American countries and Greenpeace, governments of many countries have restricted the use of PVC products. Although environmentally friendly PU synthetic leather can meet the needs of high-end automotive interiors, its high price, especially its dependence on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C51/10B29C51/46B29L31/58
CPCB29C51/10B29C51/46B29L2031/58
Inventor 贾玉玺赵亚如智杰颖周勇
Owner SHANDONG UNIV
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