CN108081634B

CN108081634B - Glass fiber reinforced plastic product forming process

Info

Publication number: CN108081634B
Application number: CN201711467822.0A
Authority: CN
Inventors: 赵坤芳; 刘春梅; 秦东坤; 曹琛; 丁智远
Original assignee: Hebei Aoke Zhongyi Environmental Protection Technology Co ltd
Current assignee: HEBEI AOKE ZHONGYI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.; QINGDAO ACCU GAUGE INSTRUMENT Co.,Ltd.
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-09-08
Anticipated expiration: 2037-12-29
Also published as: CN108081634A

Abstract

The invention belongs to the technical field of glass fiber reinforced plastic preparation devices, and discloses a glass fiber reinforced plastic product molding process. The technical scheme is as follows: the method comprises the steps of preparing a bonding surface, preparing a main part of the glass fiber reinforced plastic product, demolding, and carrying out composite molding and shaping to form the glass fiber reinforced plastic product. When the process is used for preparing the glass fiber reinforced plastic product consisting of the main accessories, the manual polishing process is not needed, and the problem of environmental pollution caused by dust formed by polishing in the glass fiber reinforced plastic preparation process is effectively solved.

Description

Glass fiber reinforced plastic product forming process

Technical Field

The invention belongs to the technical field of glass fiber reinforced plastic molding, and particularly relates to a glass fiber reinforced plastic product molding process.

Background

In order to meet the bonding strength between the fiber layers of the main part and the accessory in the processing process of bonding the accessory on a formed main part workpiece, the glass fiber reinforced plastic product needs to be polished in the bonding area of the product to form a pitted surface so as to increase the bonding area and improve the overall bonding strength. The pitted surface is usually formed by manual grinding, the manual operation is time-consuming and labor-consuming, and harmful dust formed by grinding can influence the health of operators.

Disclosure of Invention

The invention aims to provide a glass fiber reinforced plastic product forming process capable of realizing bonding of glass fiber reinforced plastic without a manual polishing process.

In order to achieve the purpose, the invention adopts the technical scheme that:

a glass fiber reinforced plastic product forming process comprises the following steps:

first, preparation of the adhesive surface

Cleaning the surface of the mould, coating a release agent, spraying an adhesive on the surface of the mould coated with the release agent, and paving the lining cloth with the porosity of 30-50% on the surface of the mould.

Second step, preparation of the main part of the glass fiber reinforced plastic product

Spraying a resin layer on the lining cloth according to the working procedure, and then spraying or sticking a fiber layer until the designed thickness of the glass fiber reinforced plastic of the main part is reached;

thirdly, demolding

When the main part is demoulded, the lining cloth is uncovered, and the surface of the main part to be bonded is exposed; spraying a resin layer and laying a fiber layer on the surface of the exposed main part to be bonded in sequence to directly form an accessory for forming a glass fiber reinforced plastic product;

fourthly, shaping by composite forming

And forming the glass fiber reinforced plastic product by composite molding and shaping.

The forming process of the glass fiber reinforced plastic product further comprises the following steps:

-the thickness of the lining cloth is 0.07-0.15 mm;

the cross section of the lining hole of the lining cloth is of a prism structure;

the prismatic structure is a triangular or quadrangular structure, and the edge forming the minimum included angle of the triangular or quadrangular structure is arranged upwards, so that the lining cloth can be conveniently taken off from the upper part;

the hole direction of the lining hole of the lining cloth is a conical structure with a small bottom hole diameter;

in the preparation process of the bonding surface, the adhesive sprayed on the surface of the die is a spray type adhesive, the using amount is 200-220 g/m2, and the thickness is 0.2-0.22 mm.

Compared with the prior art, the forming process of the glass fiber reinforced plastic product provided by the invention has the following advantages: firstly, the surface of the glass fiber reinforced plastic is roughened by sticking the removable lining cloth on the die, and the glass fiber reinforced plastic accessories with an integral structure can be stuck and formed on the roughened surface, so that a complete glass fiber reinforced plastic product is formed; the preparation of the glass fiber reinforced plastic product can be completed without polishing the bonding area; the problem of environmental pollution caused by dust formed by polishing in the preparation process of the glass fiber reinforced plastic is effectively solved; secondly, as the cross section of the lining hole of the lining cloth used in the preparation process is of a prismatic structure, the bulge of the formed rough surface is of an inverted-truncated-cone-shaped structure, and the connection strength of the glass fiber reinforced plastic accessory formed on the rough surface can be greatly improved; thirdly, as the cross section of the lining hole of the lining cloth is of a triangular or quadrangular structure, and the edge of the smallest included angle of the triangular or quadrangular structure is arranged upwards, the resistance is smaller and more convenient when the lining cloth is taken off from the upper part to the lower part.

Drawings

FIG. 1 is a schematic diagram of a process for preparing a glass fiber reinforced plastic main part;

FIG. 2 is a schematic view of a process for making a glass fiber reinforced plastic attachment;

FIG. 3 is a schematic structural diagram of a lining cloth for a glass fiber reinforced plastic product forming process provided by the invention;

FIG. 4 is a schematic structural diagram of a first lining cloth;

fig. 5 is a schematic structural diagram of a second lining cloth.

Detailed Description

The forming process of the glass fiber reinforced plastic product provided by the invention is further described in detail with reference to the attached drawings.

The glass fiber reinforced plastic product forming process includes the following steps:

first, preparation of the adhesive surface

Cleaning the surface of a mold 1, coating a release agent layer 2 on the surface, spraying an adhesive layer 3 with the thickness of 0.2-0.22 mm and the using amount of 200-220 g/m2 on the surface of the mold coated with the release agent layer, and then paving a lining cloth 4 with the porosity of 30-50% on the surface of the mold 1 from bottom to top without wrinkles, as shown in figure 1;

Spraying a resin layer 5 on the paved lining cloth 4 according to the working procedure, so that the resin is poured into lining cloth holes 41, then pasting a fiber layer on the resin, and sequentially coating the resin and pasting the fiber until the thickness of the glass fiber reinforced plastic of the designed main part is reached to form a main part blank 6;

thirdly, demolding

When the main part blank 6 is separated from the mould 1, the lining cloth 4 adhered on the main part blank 6 is uncovered, namely the rough surface of the main part which needs to be adhered and is solidified with the bulges 61 corresponding to the lining cloth lining holes 41 is exposed; then, directly forming an accessory 7 (shown in figure 2) which forms a glass fiber reinforced plastic product on the exposed pitted surface (the main part needs to be bonded) by sequentially spraying a resin layer 71 and laying a fiber layer 72;

the fourth step, shaping

And shaping the prepared main body blank 6 and the accessory 7 to form the glass fiber reinforced plastic product.

In the above glass fiber reinforced plastic product molding process:

in order to form the height of the surface bulge, the appropriate pitted surface bulge can be formed, the lining cloth can be smoothly torn off, and the thickness of the used lining cloth is selected to be 0.07-0.15 mm;

in order to further improve the firm adhesion between the protrusions formed by the lining holes of the lining cloth and the glass fiber reinforced plastic accessories, the section of the lining hole 41 of the lining cloth is of a triangular or quadrangular prism structure as shown in fig. 4 and 5; in the preparation process of the bonding surface, the lining cloth 4 is paved on the surface of the die 1 from bottom to top without folds; the edge 411 forming the minimum included angle of the three edges or the four edges is arranged upwards, so that the lining cloth can be conveniently taken off from the upper part downwards;

when the planar interface of the lining hole of the lining cloth is circular or conical (as shown in fig. 3), the hole direction is a conical structure with a small hole diameter at the bottom 412 and a large hole diameter at the top (the contact surface with the main part) 413, so that the formed protrusion 61 of the pitted surface is of an inverted conical structure corresponding to the lining hole; when the rough surface (to be bonded with the main part) is coated with the resin layer 71 and the fiber layer 72 to form the accessory 7 of the glass fiber reinforced plastic product, the resin layer enters the rough surface layer 62 with a large bottom and a small top to form a snap connection with the protrusion 61 of the rough surface, so that the connection strength of the resin part of the glass fiber reinforced plastic accessory and the resin part of the main part is greatly enhanced.

In the preparation process of the bonding surface, the adhesive layer 3 with the thickness of 0.2-0.22 mm and the using amount of 200-220 g/m2 is sprayed on the surface of the die coated with the release agent layer, and the lining cloth 4 is paved on the surface of the die 1 from bottom to top without wrinkles, namely, the lining cloth 4 can be released from the die easily.

Claims

1. A glass fiber reinforced plastic product forming process comprises the following steps:

first, preparation of the adhesive surface

Cleaning the surface of a mold, coating a release agent, spraying an adhesive on the surface of the mold coated with the release agent, and paving lining cloth with porosity of 30-50% on the surface of the mold;

Spraying a resin layer on the lining cloth according to the working procedures, and then spraying or sticking a fiber layer until the designed thickness of the glass fiber reinforced plastic of the main part is reached;

thirdly, demolding

Demolding the main part, and removing the lining cloth to expose the surface of the main part to be bonded; spraying a resin layer and laying a fiber layer on the surface of the exposed main part to be bonded in sequence to directly form an accessory for forming a glass fiber reinforced plastic product;

fourthly, shaping by composite forming

Forming a glass fiber reinforced plastic product through composite molding and shaping;

the thickness of the lining cloth is 0.07-0.15 mm; the cross section of the lining hole of the lining cloth is of a prismatic structure; the prismatic structure is a triangular or quadrangular structure, and the edge forming the minimum included angle of the triangular or quadrangular structure is arranged upwards, so that the lining cloth can be conveniently taken off from the upper part to the lower part; the hole direction of the lining hole of the lining cloth is a conical structure with a small bottom hole diameter.

2. A process for forming a glass fibre reinforced plastic article according to claim 1, wherein: in the preparation process of the bonding surface, the adhesive sprayed on the surface of the die is a spray type adhesive, and the using amount is 200-220 g/m²And the thickness thereof is 0.20 to 0.22 mm.