CN120461796A

CN120461796A - Surface coating process of blister pads according to different vehicle types

Info

Publication number: CN120461796A
Application number: CN202510968561.9A
Authority: CN
Inventors: 俞小鹏
Original assignee: Zhejiang Sanmen Viair Industry Co ltd
Current assignee: Zhejiang Sanmen Viair Industry Co ltd
Priority date: 2025-07-15
Filing date: 2025-07-15
Publication date: 2025-08-12
Anticipated expiration: 2045-07-15
Also published as: CN120461796B

Abstract

The application discloses a surface film coating process of a vehicle-type plastic suction foot pad, which comprises the steps of 1, cutting a functional film into a required shape, 2, coating a hot melt adhesive on the surface of the cut functional film, placing the glued functional film in a groove of a plastic suction die, 3, preprocessing a plastic suction sheet, softening the plastic suction sheet, 4, placing the softened plastic suction sheet at the upper end of the plastic suction die, 5, opening a plastic suction machine, setting parameters of the plastic suction machine, and carrying out hot melting on the plastic suction sheet and the functional film together through air suction.

Description

Surface film coating process for separated type plastic uptake foot pad

Technical Field

The invention belongs to the technical field of plastic suction molds, and relates to a surface film coating process of a plastic suction foot pad of a split-vehicle type.

Background

In the current mainstream production process of the automobile foot pad, a plastic suction method is widely adopted due to low cost and high efficiency, but is limited by process characteristics, and the integration of a surface color film cannot be realized all the time. Although the injection molding process can realize surface film coating, the problems of high mold cost, long production period and the like exist. At present, the color effect of the plastic sucking foot pad in the market is mostly realized by adopting later spraying or adhesive patches, and the defects of poor adhesive force, easy stripping, insufficient environmental protection and the like exist.

Disclosure of Invention

The invention provides a surface film coating process of a plastic sucking foot pad of a split vehicle type, which aims to overcome at least one defect of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme that the surface film coating process of the separated-vehicle type plastic-sucking foot pad comprises the following steps:

step 1, cutting a functional film into a required shape;

Step 2, coating hot melt adhesive on the surface of the cut functional film, and placing the glued functional film in a groove of a plastic suction die;

Step 3, pre-treating the plastic-absorbing sheet material, and softening the plastic-absorbing sheet material;

step 4, placing the softened plastic suction sheet at the upper end of a plastic suction mould;

step 5, opening a plastic sucking machine, setting parameters of the plastic sucking machine, and thermally fusing the plastic sucking sheet and the functional film together through air plastic sucking;

And 6, cooling, shaping, demolding and trimming to obtain the plastic-sucking automobile foot pad with the integrated color functional layer on the surface.

Further, the functional film is a color functional film, and the color functional film is a thermoplastic film material.

Further, the plastic suction mould is provided with a plurality of grooves, and air suction holes are distributed at the edge positions of the grooves.

Further, the grooves are provided with at least one color of functional film.

Further, the plastic suction sheet comprises a leveling area and a protruding area, the leveling area covers the upper end face of the plastic suction die, the protruding area is arranged inside the groove, and the lower end face of the protruding area is connected with the surface of the functional film.

Further, the thermoplastic membrane material comprises TPE membrane, TPO membrane, TPU membrane and PP membrane.

Further, the depth of the groove is larger than the thickness of the functional film.

Further, the plastic-absorbing sheet is softened by heating in an oven.

In summary, the invention has the following advantages:

The application realizes integration of the surface color film by thermally fusing the plastic sucking sheet and the functional film together, reduces the cost of the die by 82% compared with an injection molding process, has strong adhesive force, difficult stripping and good environmental protection, can preset different functional films in the grooves of the plastic sucking die to realize area differential film coating, and can be quickly replaced according to the needs to realize customization of small-batch multiple vehicle types.

Drawings

FIG. 1 is a process flow diagram of the present invention.

FIG. 2 is a schematic view of a part of a plastic suction mold 1 according to the present invention

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

All directional indications (such as up, down, left, right, front, rear, lateral, longitudinal) in embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular pose, and if the particular pose changes, the directional indication changes accordingly.

For reasons of installation errors, the parallel relationship referred to in the embodiments of the present invention may be an approximately parallel relationship, and the perpendicular relationship may be an approximately perpendicular relationship.

Examples

As shown in fig. 1-2, the surface film coating process of the plastic uptake foot pad of the split vehicle type comprises the following steps:

step 1, cutting the functional film 2 into a required shape;

The functional film 2 is a color functional film, in particular a thermoplastic film material, which is a film with extremely high stretching rate and high temperature resistance, and the thermoplastic film material comprises one or a mixture of a plurality of TPE film, TPO film, TPU film, PP film and the like.

Step 2, coating hot melt adhesive on the surface of the cut functional film 2, and placing the glued functional film 2 in a groove 11 of a plastic suction mold 1;

The plastic suction mould 1 is provided with a plurality of grooves 11, suction holes 12 are distributed at the edge positions of the grooves 11, the functional film 2 covers the suction holes 12, the depth of the grooves 11 is larger than the thickness of the functional film 2, and the thickness range of the functional film 2 is preferably 0.5mm-1mm.

The surface of the functional film 2 facing the outside of the groove 11 is provided with a layer of high-performance hot melt adhesive which can keep viscosity at high temperature of plastic suction, can be stretched and deformed violently along with the functional film 2 and the plastic suction sheet 3 without cracking or delamination, and forms permanent strong adhesion after cooling.

The plastic suction mould 1 is provided with a plurality of grooves 11, and the specific grooves 11 can be preset with functional films 2 with different colors to support area differentiation coating films, so that one foot pad is provided with the double-color or multi-color functional films 2.

Step 3, pretreating the plastic-absorbing sheet 3, and softening the plastic-absorbing sheet;

The plastic uptake sheet 3 is heated and softened by an oven, wherein the softening parameters of the oven are that the upper temperature of the oven is 150-170 ℃ and the lower temperature of the oven is 170-190 ℃ by zoned radiation heating (independent temperature control from top to bottom), and the heating time is 40-60 seconds, and the softening parameters are determined according to the thickness of the material.

The heated and softened plastic uptake sheet 3 can be vacuum-absorbed and stretched to grooves (such as anti-skid teeth and reinforcing ribs of foot pads) of the plastic uptake mold 1, so that the plastic uptake sheet can be attached to a complex curved surface, and fine textures (such as leather lines, sand lines and the like) on the surface of the plastic uptake mold 1 can be accurately duplicated due to high fluidity.

Step 4, placing the softened plastic uptake sheet 3 at the upper end of the plastic uptake mould 1;

The plastic sucking sheet 3 comprises a flat area 31 and a raised area 32, wherein the flat area 31 covers the upper end face of the plastic sucking mould 1, the shape of the raised area 32 is matched with the cross section shape of the groove 11, the raised area 32 is arranged inside the groove 11, and the lower end face of the raised area 32 is connected with the surface of the functional film 2 positioned in the groove 11.

Step 5, opening a plastic sucking machine, setting parameters of the plastic sucking machine, and thermally fusing the plastic sucking sheet 3 and the functional film 2 together through air plastic sucking;

The plastic uptake parameters are as follows:

vacuum degree is-0.9 to-0.95 bar;

the vacuum rate is 0.5-2S to-0.9 bar;

the molding time is 8-15 seconds;

The plastic sucking sheet 3 and the functional film 2 are fused together in the plastic sucking process to realize the integration of the surface color film.

The cooling mode can adopt air cooling and water cooling, and the demoulding temperature is less than or equal to 60 ℃.

The air suction holes 12 of the embodiment are designed at the edge positions of the grooves 11, a plurality of air suction holes 12 are externally connected with a vacuum pump, so that the air in the grooves 11 is extracted, and the air suction holes 12 have the following functions:

Air in the groove 11 is pumped by a vacuum pump, negative pressure is formed between the plastic sucking sheet 3 and the plastic sucking mould, and the softened plastic sucking sheet 3 is forced to cling to the outline of the plastic sucking mould;

The plastic sucking sheet 3 is guided to stretch and fill in a preset direction, so that local accumulation or excessive thinning is avoided.

3. Air retained in the corners of the grooves 11 is rapidly pumped away, so that defects such as bubbles and bulges are prevented.

4. Maintaining the adsorption force until cooling and solidifying, and ensuring the stable shape of the product.

The application realizes the integration of the surface color film by thermally fusing the plastic sucking sheet 3 and the functional film 2 together, reduces the die cost by 82% compared with an injection molding process, has strong adhesive force, difficult stripping and good environmental protection, can preset different functional films 2 in the groove 11 of the plastic sucking die 1 to realize the area differentiation film coating, and can realize the rapid replacement of the functions according to the needs and the customization of small-batch multiple vehicle types.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Claims

1. The surface coating process of the blister pads for different types of vehicles is characterized by comprising the following steps:

Step 1: Cut the functional film into the required shape;

Step 2: Apply hot melt adhesive to the surface of the cut functional film and place the adhesive-coated functional film in the groove of the blister mold;

Step 3: Pre-treat the blister sheet and soften it;

Step 4: Place the softened blister sheet on the top of the blister mold;

Step 5: Turn on the blister machine, set the parameters of the blister machine, and heat-melt the blister sheet and the functional film together through air blistering;

Step 6: After cooling and shaping, demoulding and trimming are performed to obtain a blister car floor mat with an integrated color functional layer on the surface.

2. The surface coating process of the vehicle-type blister foot pad according to claim 1 is characterized in that the functional film is a colored functional film, and the colored functional film is a thermoplastic film material.

3. The surface laminating process of the vehicle-type blister foot pad according to claim 1 is characterized in that the blister mold is provided with a plurality of grooves, and suction holes are distributed at the edges of the grooves.

4. The surface coating process of the vehicle-type blister foot pad according to claim 1 is characterized in that the groove is pre-set with a functional film of at least one color.

5. The surface laminating process of the vehicle-type blister foot pad according to claim 1 is characterized in that the blister sheet includes a flat area and a raised area, the flat area covers the upper end surface of the blister mold, the raised area is arranged inside the groove, and the lower end surface of the raised area is in contact with the surface of the functional film.

6. The surface laminating process of the vehicle type blister foot pad according to claim 2, characterized in that the thermoplastic film material includes TPE film, TPO film, TPU film, and PP film.

7. The surface coating process of the vehicle-type blister foot pad according to claim 1, characterized in that the depth of the groove is greater than the thickness of the functional film.

8. The surface coating process of the vehicle-type blister foot pad according to claim 1, characterized in that the blister sheet is softened by heating in an oven.