阅读说明：本技术 汽车装饰件模内装饰发泡复合工艺 (In-mold decoration foaming composite process for automobile decoration ) 是由 肖鹏 于 2019-12-09 设计创作，主要内容包括：本发明公开了汽车装饰件模内装饰发泡复合工艺技术领域的汽车装饰件模内装饰发泡复合工艺,装饰件本体包括热塑性树脂基体,所述热塑性树脂基体的外壁上固定装配有无纺布层,所述无纺布层的外壁固定装配有可回弹泡沫棉层,所述可回弹泡沫棉层的外壁上固定装配有保温饰板层,在软质型触感的装饰件本体外壁上均匀铺设有聚氨酯垫块,所述保温饰板层的外壁上装配有微发泡聚氨酯层,所述微发泡聚氨酯层的外壁上安装有金属面板而形成金属保温装饰板,通过层状材料的选择,以及火焰预复合工艺和模塑成型工艺的有机组合,使得使得制品表面一致性好,使得结构压实密度较高,防止在受到高温后形成变形凹坑,保证了产品的加工质量。(The invention discloses an automobile decoration in-mold decoration foaming composite process in the technical field of automobile decoration in-mold decoration foaming composite processes, wherein a decoration body comprises a thermoplastic resin substrate, a non-woven fabric layer is fixedly assembled on the outer wall of the thermoplastic resin substrate, a reboundable foam cotton layer is fixedly assembled on the outer wall of the non-woven fabric layer, a heat-preservation decoration plate layer is fixedly assembled on the outer wall of the reboundable foam cotton layer, polyurethane cushion blocks are uniformly paved on the outer wall of the soft touch decoration body, a micro-foam polyurethane layer is assembled on the outer wall of the heat-preservation decoration plate layer, a metal panel is installed on the outer wall of the micro-foam polyurethane layer to form a metal heat-preservation decoration plate, through the selection of layered materials and the organic combination of a flame pre-composite process and a molding process, the surface consistency of a product is good, and the structure compaction density is high, the deformation pits are prevented from being formed after the high temperature is applied, and the processing quality of the product is ensured.)

1. Automobile decoration mould interior decoration foaming composite technology, automobile decoration wherein includes the decoration body of soft type sense of touch, its characterized in that: the decoration body includes thermoplastic resin base member (1), the fixed non-woven fabrics layer (2) that is equipped with on the outer wall of thermoplastic resin base member (1), the fixed cotton layer of foam (3) that can kick-back that is equipped with of outer wall of non-woven fabrics layer (2), the fixed heat preservation decorative board layer (4) that is equipped with on the outer wall of the cotton layer of foam (3) that can kick-back, evenly laid polyurethane cushion (5) on the decoration body outer wall of soft type sense of touch, be equipped with on the outer wall of heat preservation decorative board layer (4) little foaming polyurethane layer (6), install metal decking (7) and form metal heat preservation decorative board on the outer wall of little foaming polyurethane layer (6).

2. The automobile decoration in-mold decoration foaming composite process according to claim 1, characterized in that: the composite process of the decoration comprises the following specific steps:

a: the non-woven fabric layer (2) and the rebound foam cotton layer (3) are sequentially and pre-flame-compounded into a whole, the non-woven fabric layer (2) and the rebound foam cotton layer (3) are required to be pre-cut into a shape required by the molding of a casting mold, then the composite body is placed and fixedly assembled in a mold cavity, and then the mold is closed.

B: the thermoplastic resin matrix (1) is pre-molded to form a matrix raw material, and the raw material is injected into a mold space between the nonwoven fabric layer (2) and a mold cavity or a core cavity.

C: after the casting mould is accomplished, cool off, the die sinking and get the piece, then with heat preservation decorative board layer (4) through the buckle joint assembly on the cotton layer of foam (3) lateral wall that can kick-back to paste the dress with interior decorative film on the outer wall of heat preservation decorative board layer (4), can form the decoration body of soft type sense of touch.

D: when the metal heat-insulation decorative plate needs to be prepared, the metal panel (7) is horizontally placed on a pre-installation platform with a carrier roller, then a plurality of groups of polyurethane cushion blocks (5) with the same structure are uniformly distributed on the surface of the metal panel (7) at intervals, and the metal panel (7) is pushed into a panel preheating drying tunnel to realize preheating operation.

E: the metal panel (7) preheated by the preheating drying channel sequentially passes through a reciprocating type casting machine and a high-density micro-foaming polyurethane casting machine, so that a high-density micro-foaming polyurethane layer (6) is formed on the surface of the metal panel (7), and the thickness of the micro-foaming polyurethane layer (6) is the same as that of the polyurethane cushion block (5).

F: and C, carrying out environment-friendly glue coating treatment on the heat-insulating veneer layer (4) cast in the step C through a PUR hot melt glue dissolving machine on the premise of not attaching the inner decorative film, then realizing butt joint extrusion on the heat-insulating veneer layer (4) and the micro-foaming polyurethane layer (6), and realizing mutual extrusion through the laminating crawler belts arranged at the upper and lower parallel intervals after butt joint extrusion, so that the extrusion stability of the heat-insulating veneer layer (4) and the micro-foaming polyurethane layer (6) is improved, the compactness can be improved simultaneously, and the metal heat-insulating decorative plate can be manufactured after cooling.

3. The automobile decoration in-mold decoration foaming composite process according to claim 2, characterized in that: the raw material of the thermoplastic resin matrix (1) in step B is a thermoplastic resin which is pre-molded in a predetermined amount, and supercritical nitrogen gas is added to the molten thermoplastic resin in an amount of 1 to 3% by mass of the thermoplastic resin, and the thermoplastic resin and the nitrogen gas are mixed in a supercritical state of the nitrogen gas to form a homogeneous solution.

4. The automobile decoration in-mold decoration foaming composite process according to claim 2, characterized in that: the rebound foam cotton layer (3) is made of cross-linked polyolefin foam material, and the rebound foam cotton layer (3) is selected to have the thickness of 1 mm-5 mm and the density of 30kg/m³--100kg/m³With a foam material therebetween.

5. The automobile decoration in-mold decoration foaming composite process according to claim 2, characterized in that: the non-woven fabric layer (2) is made of hot-melt resin, and the non-woven fabric is polyethylene terephthalate non-woven fabric with the gram weight of 170 grams per square meter.

6. The automobile decoration in-mold decoration foaming composite process according to claim 2, characterized in that: and D, arranging a preheating drying tunnel at the rear part of the pre-installation platform, and uniformly arranging carrier rollers and electric heating pipes at intervals in the lower part of the preheating drying tunnel.

Technical Field

The invention relates to the technical field of an automobile decoration in-mold decoration foaming composite process, in particular to an automobile decoration in-mold decoration foaming composite process.

Background

With the popularization of automobile consumption, on one hand, in order to reduce energy consumption, the overall quality of an automobile is required to be reduced as much as possible; on the other hand, passengers seek comfort for riding, the interior trim part is required to have soft touch and noise reduction effects, the automotive interior trim increasingly adopts foam materials as inner liners to realize the two functions, at present, a common method is to firstly perform injection molding on a thermoplastic resin framework, then spray glue or brush glue on the framework, and then adhere polyurethane foam and surface fabric or leather to the thermoplastic resin framework, so that the adhesive curing time is easy to result, subsequent shaping treatment is needed, organic peculiar smell can be generated by adopting poor adhesive, and when the outdoor temperature changes in cold and hot, if the decorative plate is a metal wire drawing panel, because the linear expansion coefficient difference between the metal wire drawing panel and the heat insulation layer is large, the material stress change is easy to cause, the hollow drum deformation between the metal wire drawing panel and the heat insulation layer is easy to occur, and meanwhile, the low-temperature hot melt glue on the back of the decorative material is easy to be punctured by the thermoplastic resin, in the case of foams having a low density, in particular, the high-temperature thermoplastic resin is introduced into the foam to form an unrecoverable collapse on the surface and to form a waste product, and therefore, we propose a foaming composite process for in-mold decoration of automobile trims.

Disclosure of Invention

The invention aims to provide an in-mold decoration foaming composite process for an automobile decoration part, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: decorate foaming composite technology in automobile decoration mould, automobile decoration wherein includes the decoration body of soft type sense of touch, and the decoration body includes the thermoplastic resin base member, the fixed non-woven fabrics layer that is equipped with on the outer wall of thermoplastic resin base member, the outer wall on non-woven fabrics layer is fixed to be equipped with the foam cotton layer that can kick-back, fixed being equipped with on the outer wall on the foam cotton layer that can kick-back keeps warm and decorates the board layer, has evenly laid the polyurethane cushion on the decoration body outer wall of soft type sense of touch, it has the microfoam polyurethane layer to assemble on the outer wall on the heat preservation board layer, install metal decking and form metal heat preservation decorative board on the outer wall on the microfoam polyurethane layer.

The composite process of the automobile decoration comprises the following specific steps:

a: the non-woven fabric layer and the reboundable foam cotton layer are sequentially and pre-flame-compounded into a whole, the non-woven fabric layer and the reboundable foam cotton layer are required to be pre-cut into a shape required by the molding and molding of a casting mold, then the composite body is placed and fixedly assembled in a mold cavity, and then the mold is closed.

B: the thermoplastic resin matrix is pre-molded to form a matrix feedstock, and the feedstock is injected into the mold space between the nonwoven layer and the mold cavity or core.

C: after the mould is accomplished, cool off, the die sinking and get the piece, then with the cotton layer lateral wall of heat preservation decorative board layer through the buckle joint assembly on can kick-backing foam to paste the dress with interior decorating film on the outer wall of heat preservation decorative board layer, can form the decoration body of soft type sense of touch.

D: when the metal heat-insulation decorative plate needs to be prepared, the metal panel is horizontally placed on a pre-installation platform with a carrier roller, then a plurality of groups of polyurethane cushion blocks with the same structure are uniformly distributed on the surface of the metal panel at intervals, and the metal panel is pushed into a panel preheating drying tunnel to realize preheating operation.

E: the metal panel preheated by the preheating drying channel sequentially passes through the reciprocating type casting machine and the high-density micro-foaming polyurethane casting machine, so that a high-density micro-foaming polyurethane layer is formed on the surface of the metal panel, and the thickness of the micro-foaming polyurethane layer is the same as that of the polyurethane cushion block.

F: and C, carrying out environment-friendly glue coating treatment on the heat-insulating veneer layer cast in the step C through a PUR hot melt adhesive glue dissolving machine on the premise of not attaching the inner decorative film, then realizing butt joint extrusion on the heat-insulating veneer layer and the micro-foaming polyurethane layer, and realizing mutual extrusion through the laminating tracks arranged at intervals in parallel up and down after butt joint extrusion, so that the extrusion stability of the heat-insulating veneer layer and the micro-foaming polyurethane layer is improved, the compactness can be improved simultaneously, and the metal heat-insulating decorative plate can be manufactured after cooling.

Preferably, the raw material of the thermoplastic resin matrix in step B is a thermoplastic resin which is pre-molded in a predetermined amount, and supercritical nitrogen gas is added to the molten thermoplastic resin in an amount of 1 to 3% by mass of the thermoplastic resin, and the thermoplastic resin and the nitrogen gas are mixed in a supercritical state of the nitrogen gas to form a homogeneous solution.

Preferably, the rebound foam cotton layer is made of cross-linked polyolefin foam materials, and the rebound foam cotton layer is selected to have the thickness of 1 mm-5 mm and the density of 30kg/m³--100kg/m³With a foam material therebetween.

Preferably, the non-woven fabric layer is a non-woven fabric made of hot-melt resin, and the non-woven fabric is a polyethylene terephthalate non-woven fabric with a gram weight of 170 grams per square meter.

Preferably, a preheating drying tunnel is arranged at the rear part of the pre-installation platform in the step D, and carrier rollers and electric heating pipes are uniformly arranged in the lower part of the preheating drying tunnel at intervals.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, through the selection of the layered materials and the organic combination of the flame pre-compounding process and the molding process, the consistency of the surface of the product is good, the structure compaction density is higher, the deformation pit is prevented from being formed after the product is subjected to high temperature, the processing quality of the product is ensured, the product has comfortable soft touch and good noise reduction performance, the manufacturing method has the characteristics of short process and high efficiency, meanwhile, the pre-heating temperature is low, the bonding effect is good, the bonding stability between the structures can be ensured, and the problem of hollowing deformation between the metal panel and the heat-insulating decorative plate layer can be effectively prevented.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure: 1 thermoplastic resin matrix, 2 non-woven fabrics layers, 3 resilient foam cotton layers, 4 heat preservation veneer layers, 5 polyurethane cushion blocks, 6 micro-foaming polyurethane layers and 7 metal panels.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.