CN110722720A - Manufacturing process for manufacturing mold demolding diaphragm lining layer of glass fiber reinforced plastic - Google Patents
Manufacturing process for manufacturing mold demolding diaphragm lining layer of glass fiber reinforced plastic Download PDFInfo
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- CN110722720A CN110722720A CN201910920943.9A CN201910920943A CN110722720A CN 110722720 A CN110722720 A CN 110722720A CN 201910920943 A CN201910920943 A CN 201910920943A CN 110722720 A CN110722720 A CN 110722720A
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- layer
- glass fiber
- fiber reinforced
- mold
- reinforced plastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/68—Release sheets
Abstract
The invention discloses a process for manufacturing a liner layer of a mold stripping diaphragm made of glass fiber reinforced plastic, wherein the liner layer of the mold stripping diaphragm is a liner layer of a solid-liquid two-phase mold stripping diaphragm, and the process comprises the following steps: the inner wall of the mould is flattened and repaired, and dust on the inner wall is cleaned; spraying or brushing a layer of adsorbent on the inner wall surface of the mold; spreading the polymer plastic film layer on the inner wall surface of the whole mould, and repeatedly pushing and rolling the polymer plastic film layer from inside to outside by using an elastic roller until no redundant adsorbent or air bubbles exist, so that the polymer plastic film layer is tightly attached to the inner wall surface of the mould; selecting a plurality of points on the periphery of the polymer plastic film layer, bonding and fixing the polymer plastic film layer on the inner wall surface of a mold by instant glue to finish the manufacture of the liner layer of the mold stripping diaphragm, manufacturing glass fiber reinforced plastics on the liner layer, combining the traditional solid or liquid single-phase surface stripping layer to ensure that the inner wall surface of the mold is provided with the liner layer of the solid-liquid two-phase stripping diaphragm, manufacturing the glass fiber reinforced plastics on the surface of the liner layer, stripping the finished product on the liquid-phase surface layer, and tearing off the diaphragm attached to the surface of the product.
Description
[ technical field ]
The invention relates to a process for manufacturing glass fiber reinforced plastic and demolding the glass fiber reinforced plastic, belongs to the technical field of mold manufacturing, and particularly relates to a process for manufacturing a liner layer of a mold demolding diaphragm of the glass fiber reinforced plastic.
[ background art ]
In order to facilitate the demolding of the finished product, the inner wall surface of the mold must be made into a low-energy surface layer. There are usually two kinds of solid or liquid state, such as solid state of coating made of solid wax, silicon rubber, etc., or liquid state of coating made of various mineral oils, animal and vegetable fats (release agents) combined with felt cloth.
The solid noodles are complicated in manufacturing process, long in time and high in cost; because the surface of the product made of the liquid surface is adsorbed with the release agent, the product can be subjected to surface putty shaping and coating after being polished and cleaned, and the procedure is high-strength labor work, high-pollution and low-efficiency work.
[ summary of the invention ]
The present invention overcomes the defects of the technology, and provides a manufacturing technology for manufacturing a mold demoulding diaphragm lining layer of glass fiber reinforced plastic, wherein the traditional solid or liquid single phase surface demoulding layer is combined, so that the inner wall surface of a mold is provided with a demoulding diaphragm lining layer of solid (a glass fiber reinforced plastic workpiece contact surface) and liquid (a mold contact surface), glass fiber reinforced plastic is manufactured on the surface of the demoulding diaphragm lining layer, a finished product is subjected to mold stripping on the liquid phase surface layer, and then a diaphragm attached on the surface of the product is torn off, and a gel coat layer of gel coat glass fiber reinforced plastic can be manufactured on the surface of the demoulding diaphragm lining layer of the mold.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing process for manufacturing a liner layer of a mold release diaphragm made of glass fiber reinforced plastic is disclosed, wherein the liner layer of the mold release diaphragm is a liner layer of a solid-liquid two-phase mold release diaphragm, and the manufacturing process comprises the following steps:
step a, flatly repairing the inner wall of the mold, and cleaning dust on the inner wall;
b, sponging or brushing a layer of adsorbent on the inner wall surface of the die;
c, paving the polymer plastic film layer on the inner wall surface of the whole mould, and repeatedly pushing and rolling the polymer plastic film layer from inside to outside by using an elastic roller until no redundant adsorbent or air bubbles exist, so that the polymer plastic film layer is tightly attached to the inner wall surface of the mould;
d, selecting a plurality of points on the periphery of the polymer plastic film layer, bonding and fixing the polymer plastic film layer on the inner wall surface of the mold by using instant glue, finishing the manufacture of the liner layer of the mold stripping diaphragm, and carrying out glass fiber reinforced plastic manufacture on the liner layer.
The process for manufacturing the backing layer of the mold release membrane made of glass fiber reinforced plastic is characterized in that after the backing layer of the mold release membrane is manufactured in the step d, a gel coat layer can be manufactured on the backing layer, and then the glass fiber reinforced plastic is manufactured on the gel coat layer.
The process for manufacturing the lining layer of the mold release membrane made of glass fiber reinforced plastic is characterized in that the inner wall of the mold is smoothed or shoveled by putty in the step a.
The process for manufacturing the lining layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the adsorbent in the step b is high-temperature-resistant silicon oil or alkane engine oil.
The process for manufacturing the liner layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the viscosity range of the adsorbent is 500-5000Pa.s, and the dosage range of the adsorbent is 30-50 g/square meter.
The process for manufacturing the liner layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the polymer plastic film layer in the step c is a polypropylene film layer or a polyester film layer.
The process for manufacturing the liner layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the polymer plastic film layer consists of a curved polymer plastic film layer and a polymer plastic film layer which are preset according to the inner wall of the mold.
The process for manufacturing the lining layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that both sides of the polymer plastic film layer are frosted surfaces, or the side in contact with the mold is frosted surface.
The process for manufacturing the liner layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the thickness range of the polymer plastic film layer is 0.02-0.2 mm.
The process for manufacturing the lining layer of the mold release diaphragm of the glass fiber reinforced plastic is characterized in that the flash glue in the step d is methyl cyanoacrylate.
The invention has the beneficial effects that:
1. the assembly cost of the whole process of the glass fiber reinforced plastic manufacturing is reduced; the manufacturing time is shortened, and the surface quality of the product is improved.
2. Is more environment-friendly; the glass fiber reinforced plastic product without release agent residue on the surface can be manufactured (the coating can be performed without polishing), the diaphragm is correspondingly treated, and the glass fiber reinforced plastic products with three surface states of smooth surface, frosted surface and gel coat surface can be conveniently manufactured.
3. The mold occupying time is short; the finished product is easier to be demoulded and can be demoulded at higher temperature.
4. The cost for manufacturing the die is reduced; the inner wall surface of the die is only a simple plane, polishing treatment is not needed, and the old die with damaged surface can be simply repaired and used.
5. The gel coat glass fiber reinforced plastic is easier to manufacture; the surface treatment of lining products in high energy state has good tolerance to the material formula and the construction performance for making gel coats, and can conveniently make various gel coats required by gel coat glass reinforced plastics, such as lightning protection gel coats with wire meshes, antistatic gel coats or composite gel coats with certain special performance.
6. The putty used for the surface modification of the product is greatly reduced.
[ description of the drawings ]
FIG. 1 is a schematic view showing the structure of a backing layer of a mold release film made of glass fiber reinforced plastic according to the present invention.
[ detailed description of the invention ]
Embodiments of the invention are described in further detail below:
as shown in fig. 1, a process for manufacturing a liner layer of a mold release membrane made of glass fiber reinforced plastic, wherein the liner layer of the mold release membrane is a liner layer of a solid-liquid two-phase mold release membrane, comprises the following steps:
step a, flatly repairing the inner wall of the mould 1 and cleaning dust on the inner wall;
b, sponging or brushing a layer of adsorbent 2 on the inner wall surface of the mold 1;
c, paving the polymer plastic film layer 3 on the inner wall surface of the full mold 1, and repeatedly rolling the polymer plastic film layer 3 from inside to outside by using an elastic roller until no redundant adsorbent 2 and bubbles exist, so that the polymer plastic film layer 3 is tightly attached to the inner wall surface of the mold 1;
d, selecting a plurality of points 4 on the periphery of the polymer plastic film layer, bonding and fixing the polymer plastic film layer on the inner wall surface of the mold by using instant glue, finishing the manufacture of the liner layer of the mold stripping diaphragm, and manufacturing glass fiber reinforced plastics on the liner layer;
among them, the present process is suitable for a metal or polymer resin surface mold which is widely used at present, and has no requirement for the smoothness of the inner wall surface of the mold.
As for the mould repairing tool, the putty (old mould) for repairing the mould is selected as long as the putty can bear the temperature of the process for manufacturing the glass fiber reinforced plastics and the damage of the absorbent, such as various organic resin cements, gypsum, cement and the like.
As for the adsorbent, all liquid C alkane, sialkane and derivatives thereof can be selected, such as high-temperature silicone oil, alkane engine oil and the like, and the dosage is 30-50 g/square meter according to the mold surface temperature of 5000Pa.s with the viscosity of 500 plus materials, so that small molecular organic matters capable of being vaporized at the temperature of the forming process of water or glass fiber reinforced plastics are prevented from being doped.
The diaphragm is selected from various transparent (semitransparent) high polymer plastic films (or composite films), such as pp polypropylene films, pet polyester films and other films, the thickness of the films is 0.02-0.20 mm, the width of the films is cut along with the inner surface of a mould, and the oversized mould surface can be bonded by the films, wherein the selection principle is that the maximum bearing temperature of the films is higher than the manufacturing process temperature of the glass fiber reinforced plastics, such as the pp film is less than 110 ℃, and the pet film is less than 150 ℃; b. must be both soft and straight, without creases or other defects.
Regarding the pretreatment of the diaphragm, a female die is required to be printed in advance on the part with large curvature change of the surface of the die, such as a corner, a concave-convex groove and the like, and a covering film is processed by plastic suction (laser 3D scanning can also be used, and a plane development picture can be printed, cut and bonded for manufacturing); wherein the direction of the mould is as follows: in order to increase the adsorption area, the frosting surface pretreatment is required, and the frosting surface roughness Ra 50-100; the glass fiber reinforced plastic product comprises the following components: the surface of the glass fiber reinforced plastic product is designed according to the surface state, and the surface is selected from a smooth surface, a frosted surface or a surface for manufacturing a gel coat.
As the adhesive, a super-energy AA flash adhesive (methyl cyanoacrylate) is selected, can lose viscosity at 70-80 ℃, is soluble in acetone and is used for film bonding and fixing.
In summary, the process of the invention uses liquid c-alkane or si-alkane or derivatives thereof as an adsorbent, and uses Van der Waals force of the liquid and vacuum adsorption force generated by liquid exhaust to adsorb the high polymer plastic pp or pet film subjected to the preset surface treatment on the inner wall surface of the mold, and selects cyanoallyl acetate as a point fixing adhesive for preventing the film from slipping. The lining layer of the mold stripping diaphragm with a solid-liquid two-phase structure is manufactured and used for manufacturing glass fiber reinforced plastic.
Claims (10)
1. A manufacturing process for manufacturing a liner layer of a mold release diaphragm made of glass fiber reinforced plastic is disclosed, wherein the liner layer of the mold release diaphragm is a liner layer of a solid-liquid two-phase mold release diaphragm, and the manufacturing process comprises the following steps:
step a, flatly repairing the inner wall of the mold, and cleaning dust on the inner wall;
b, sponging or brushing a layer of adsorbent on the inner wall surface of the die;
c, paving the polymer plastic film layer on the inner wall surface of the whole mould, and repeatedly pushing and rolling the polymer plastic film layer from inside to outside by using an elastic roller until no redundant adsorbent or air bubbles exist, so that the polymer plastic film layer is tightly attached to the inner wall surface of the mould;
d, selecting a plurality of points on the periphery of the polymer plastic film layer, bonding and fixing the polymer plastic film layer on the inner wall surface of the mold by using instant glue, finishing the manufacture of the liner layer of the mold stripping diaphragm, and carrying out glass fiber reinforced plastic manufacture on the liner layer.
2. The process of claim 1, wherein the backing layer is made of glass fiber reinforced plastic, and the backing layer is made of a mold release membrane, wherein the backing layer comprises: and d, after the preparation of the lining layer of the mold stripping diaphragm is finished in the step d, a gel coat layer can be prepared on the lining layer, and then the glass fiber reinforced plastic preparation is carried out on the gel coat layer.
3. The process of claim 1, wherein the backing layer is made of glass fiber reinforced plastic, and the backing layer is made of a mold release membrane, wherein the backing layer comprises: and (b) scraping or shoveling the inner wall of the mold through putty in the step a.
4. The process of claim 1, wherein the backing layer is made of glass fiber reinforced plastic, and the backing layer is made of a mold release membrane, wherein the backing layer comprises: in the step b, the adsorbent is high-temperature-resistant silicon oil or alkane engine oil.
5. The process for making a backing layer of mold release membrane of glass fiber reinforced plastic according to claim 1 or 4, wherein: the viscosity range of the adsorbent is 500-5000Pa.s, and the dosage range of the adsorbent is 30-50 g/square meter.
6. The process of claim 1, wherein the backing layer is made of glass fiber reinforced plastic, and the backing layer is made of a mold release membrane, wherein the backing layer comprises: and the polymer plastic film layer in the step c is a polypropylene film layer or a polyester film layer.
7. The process for making a backing layer of mold release membrane of glass fiber reinforced plastic according to claim 1 or 6, wherein: the polymer plastic film layer consists of a curved surface polymer plastic film layer preset according to the inner wall of the mold and a polymer plastic film layer.
8. The process for making a backing layer of mold release membrane of glass fiber reinforced plastic according to claim 1 or 6, wherein: the two surfaces of the polymer plastic film layer are frosted surfaces, or the surface contacting with the mould is a frosted surface.
9. The process for making a backing layer of mold release membrane of glass fiber reinforced plastic according to claim 1 or 6, wherein: the thickness range of the polymer plastic film layer is 0.02-0.2 mm.
10. The process of claim 1, wherein the backing layer is made of glass fiber reinforced plastic, and the backing layer is made of a mold release membrane, wherein the backing layer comprises: in the step d, the instant adhesive is methyl cyanoacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920943.9A CN110722720A (en) | 2019-09-27 | 2019-09-27 | Manufacturing process for manufacturing mold demolding diaphragm lining layer of glass fiber reinforced plastic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920943.9A CN110722720A (en) | 2019-09-27 | 2019-09-27 | Manufacturing process for manufacturing mold demolding diaphragm lining layer of glass fiber reinforced plastic |
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| CN110722720A true CN110722720A (en) | 2020-01-24 |
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| CN201910920943.9A Withdrawn CN110722720A (en) | 2019-09-27 | 2019-09-27 | Manufacturing process for manufacturing mold demolding diaphragm lining layer of glass fiber reinforced plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021829A (en) * | 2021-03-19 | 2021-06-25 | 江西天丰建设集团管业科技有限公司 | Preparation process of high-temperature bubble-reducing double-rib double-color reinforced spiral corrugated pipe |
Citations (5)
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|---|---|---|---|---|
| CN1286161A (en) * | 1999-08-26 | 2001-03-07 | 广州市科宝有限公司 | Quickly shaping technology for glass fibre reinforced plastics products |
| CN102675846A (en) * | 2012-02-28 | 2012-09-19 | 山东亿昌照明科技有限公司 | Glass fiber reinforced plastic lighting fixture shell and processing technology thereof |
| CA2907492A1 (en) * | 2013-03-22 | 2014-09-25 | Gregory Thomas Mark | Three dimensional printing |
| CN106476363A (en) * | 2016-10-14 | 2017-03-08 | 江苏九天光电科技有限公司 | A kind of preparation method of frosting aluminium-plastic tape |
| CN109906845A (en) * | 2019-01-03 | 2019-06-21 | 潘森治 | A kind of sticky net film suitable for covering fruit tree |
-
2019
- 2019-09-27 CN CN201910920943.9A patent/CN110722720A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286161A (en) * | 1999-08-26 | 2001-03-07 | 广州市科宝有限公司 | Quickly shaping technology for glass fibre reinforced plastics products |
| CN102675846A (en) * | 2012-02-28 | 2012-09-19 | 山东亿昌照明科技有限公司 | Glass fiber reinforced plastic lighting fixture shell and processing technology thereof |
| CA2907492A1 (en) * | 2013-03-22 | 2014-09-25 | Gregory Thomas Mark | Three dimensional printing |
| CN106476363A (en) * | 2016-10-14 | 2017-03-08 | 江苏九天光电科技有限公司 | A kind of preparation method of frosting aluminium-plastic tape |
| CN109906845A (en) * | 2019-01-03 | 2019-06-21 | 潘森治 | A kind of sticky net film suitable for covering fruit tree |
Non-Patent Citations (1)
| Title |
|---|
| 杨柳涛 等: "《高分子材料》", 31 May 2016, 成都：电子科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021829A (en) * | 2021-03-19 | 2021-06-25 | 江西天丰建设集团管业科技有限公司 | Preparation process of high-temperature bubble-reducing double-rib double-color reinforced spiral corrugated pipe |
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