CN114434828A - Preparation method of silica gel mold of glass fiber reinforced plastic product with anti-skid surface - Google Patents
Preparation method of silica gel mold of glass fiber reinforced plastic product with anti-skid surface Download PDFInfo
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- CN114434828A CN114434828A CN202210086324.6A CN202210086324A CN114434828A CN 114434828 A CN114434828 A CN 114434828A CN 202210086324 A CN202210086324 A CN 202210086324A CN 114434828 A CN114434828 A CN 114434828A
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- silica gel
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- quartz sand
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
- B29C70/021—Combinations of fibrous reinforcement and non-fibrous material
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a preparation method of a silica gel mold of a glass fiber reinforced plastic product with an anti-skid surface, which comprises the following steps: preparing a primary mold, and fixing quartz sand on a plane; secondly, surface treatment, namely cleaning loose quartz sand, spraying a release agent on the surface of the quartz sand, and enclosing the periphery of the quartz sand by using oil sludge; preparing a die: selecting two-component flexible silica gel for a mold, and preparing and putting glue solution for three times; fourthly, separating the silica gel mold from the surface of the quartz sand after the glue solution is solidified. The silica gel mold is made of flexible silica gel, can be conveniently uncovered from a product, and the product can duplicate the surface effect of the mold to obtain the glass fiber reinforced plastic product with the anti-skid surface. The anti-skid surface of the glass fiber reinforced plastic product manufactured by using the silica gel mold is integrated with the glass fiber reinforced plastic product body, the firmness and durability of the anti-skid layer are consistent with those of the glass fiber reinforced plastic body, and the problems of falling off, advanced aging and the like of the anti-skid layer are effectively avoided.
Description
Technical Field
The invention relates to a preparation method of a mold, in particular to a preparation method of a silica gel mold of a glass fiber reinforced plastic product with an anti-skid surface.
Background
At present, the application range of the glass fiber reinforced plastic material is more and more extensive, and the problem of surface skid resistance of products in certain fields is obvious. In order to achieve the anti-skid effect, polyurethane elastic paint is coated on the surface of some products to prevent skidding, the surface of the product is frosted to achieve the anti-skid effect, and quartz sand is added on the surface to achieve the anti-skid effect. All the above modes have the antiskid function, but the limitation is large: the polyurethane paint has a common anti-skid effect and can fall off after a long time; the frosted surface has a general anti-skid effect and is not suitable for occasions with high anti-skid requirements; the anti-skid effect of the added quartz sand layer is good, but the quartz sand is easy to fall off after a long time, so that the anti-skid effect is reduced, and in addition, the quartz sand is not suitable for some occasions with corrosion.
For example, chinese patent document CN203755155U (application No. 201420108878.2) discloses an adhesive type antiskid glass fiber reinforced plastic road and bridge deck, which comprises a deck body, connecting blocks, an adhesive layer, and an antiskid coating layer, wherein the antiskid coating layer is composed of an adhesive and wear-resistant particles; the bonding glue layer is sprayed on the road deck of the panel main body; the wear-resistant particles in the antiskid coating are uniformly distributed on the adhesive layer, and the wear-resistant particles are adhered to the adhesive layer by spraying an adhesive; the connecting clamping block is connected with the panel main body in a bonding manner. The utility model discloses a spraying bonding glue film on the road bridge face of panel main part, and make wear-resisting particle evenly distributed on bonding glue film through the mode of spraying binder on bonding glue film to form the non-skid surface of panel main part.
For another example, chinese patent document CN106739008A (application No. 201611143911.5) discloses a manufacturing method of anti-skid glass fiber reinforced plastic, in which a polyester protrusion structure is formed on the glass fiber reinforced plastic by using a filler, including the following steps: determining the geometric dimension, the thickness and the shape of a glass fiber reinforced plastic bulge structure according to requirements; step two, processing a mould corresponding to the structure of the glass fiber reinforced plastic structure according to the glass fiber reinforced plastic structure determined in the step one; step three, selecting low-density polyester as a base material of the protruding structure, and filling the base material into a cavity corresponding to the protruding structure in the mold; filling epoxy resin and fiber cloth into the filled mold plane, finishing cloth pasting and glue brushing according to the requirements of the glass fiber reinforced plastic manufacturing method, and finishing the pre-embedding of the fastener according to the requirements of an interface in the manufacturing process; step five, heating and preserving heat after the filling is finished, and curing the glass fiber reinforced plastics; and step six, stripping the glass fiber reinforced plastic from the mold.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a silica gel mold of a glass fiber reinforced plastic product with an anti-skid surface.
The technical scheme for realizing the aim of the invention is a preparation method of a silica gel mold of a glass fiber reinforced plastic product with an anti-skid surface, which comprises the following steps:
preparing a primary mold: preparing a flat surface according to the size of a silica gel mold to be manufactured, and cleaning the flat surface; after the flat surface is dried, spraying an unsaturated polyester resin layer on the surface to obtain a bottom coating, flatly paving quartz sand on the bottom coating resin layer, spraying resin with air drying performance on the surface of the quartz sand to obtain a surface coating, and waiting for the resin to be cured.
Surface treatment: blowing the solidified quartz sand in the step I by using a high-pressure air gun, cleaning the loosened quartz sand, spraying a release agent on the surface of the quartz sand, and enclosing the periphery of the quartz sand by using oil sludge.
Preparing a die: selecting two-component flexible silica gel for a mold, and preparing and putting glue solution for three times.
First configuration: weighing two-component flexible silica gel, mixing and stirring uniformly, vacuumizing and defoaming, brushing the quartz sand surface treated in the step two with a brush, and standing for 20 +/-5 min, wherein glue solution is attached to the quartz sand surface.
And (3) second configuration: weighing two-component flexible silica gel, weighing chopped glass fiber, mixing the two-component flexible silica gel and the chopped glass fiber, stirring uniformly, vacuumizing, defoaming, pouring into a mold cavity, allowing the glue solution to submerge quartz sand, standing for 20 +/-5 min, and spreading a layer of glass fiber roving cloth on the surface.
And (3) third configuration: weighing two-component flexible silica gel, mixing and stirring uniformly, vacuumizing and defoaming, coating a glue solution on the surface of glass fiber untwisted roving cloth, repeatedly paving a layer of glass fiber untwisted roving cloth and coating a layer of glue solution for 0-3 times, and demolding after curing;
fourthly, separating the silica gel mold from the surface of the quartz sand after the glue solution is solidified, checking whether the surface has defects, repairing the positions with the defects, and finishing the manufacture of the silica gel mold.
In the first step, the unsaturated polyester resin of the bottom coating is non-air-drying resin, wherein an accelerator and an initiator are added, and the thickness of the bottom coating is 0.2-0.5 mm.
In the step I, the resin with air-drying performance in the top coating is air-drying resin or common resin added with air-drying agent.
Optionally, in the step I, the thickness of the top coating is 0.3-0.5 mm.
In the step I, the thickness of the quartz sand paved on the resin layer is 6-7 mm.
And secondly, spraying the release agent on the surface of the quartz sand for three times, wherein the spraying interval is 15 +/-5 min each time.
And in the third step, when the surface of the quartz sand processed in the second step is coated with a brush, coating according to 800-1000 g/square meter.
In the third step, the weight of the chopped glass fiber is 0.5-1.5% of the total weight of the double components.
The invention has the positive effects that: the silica gel mould is made of flexible silica gel, can be conveniently uncovered from a product, and the product can duplicate the surface effect of the mould as it is to obtain the glass fiber reinforced plastic product with the anti-skid surface.
The anti-skid surface of the glass fiber reinforced plastic product manufactured by using the silica gel mold is integrated with the glass fiber reinforced plastic product body, the firmness and durability of the anti-skid layer are consistent with those of the glass fiber reinforced plastic body, and the problems of falling off, advanced aging and the like of the anti-skid layer are effectively avoided.
In the invention, the glass fiber chopped fiber and the glass fiber roving are added in the forming process of the silica gel mold, so that the tensile strength and the service life of the silica gel mold are effectively improved.
Drawings
FIG. 1 is a photograph of a glass fiber reinforced plastic article with a non-slip surface prepared using the mold of the present invention.
Detailed Description
(example 1)
The preparation method of the silica gel mold for the glass fiber reinforced plastic product with the anti-skid surface comprises the following steps:
preparing a primary mold: preparing a flat surface (such as an iron plate plane, a wood plate plane and a plastic plate plane) according to the size of the silica gel mold to be manufactured, and cleaning the flat surface.
In order to facilitate cleaning of a field operation surface formed by the mold, namely cleaning of a quartz sand layer is facilitated after manufacturing, and after the surface is cleaned, the surface can be treated by using a PMR (polyethylene terephthalate) release agent or a paraffin release agent.
After the surface is dried, an unsaturated polyester resin layer (added with an accelerant and an initiator) is sprayed on the surface to obtain a bottom coating, and the thickness of the bottom coating (non-air-drying type) is 0.2-0.5 mm.
Then paving quartz sand (the weight ratio of various particle diameters in the embodiment is 0.5mm:1mm:5mm =1:1: 2) on the resin layer to achieve the required anti-skid surface effect, wherein the thickness of the quartz sand is 6-7 mm; and then, uniformly spraying resin (added with an accelerator and an initiator) with air drying performance on the surface of the quartz sand (ensuring that resin glue solution is adhered to the surface of the quartz sand), waiting for the resin to be cured to obtain a surface coating, wherein the thickness of the surface coating (air drying, sprayed on the surface of the quartz sand) is 0.3-0.5 mm.
The resin having air-drying property used in this embodiment is an air-drying resin, or a general resin to which an air-drying agent is added, such as an air-drying unsaturated polyester resin, or a general unsaturated polyester resin to which an air-drying agent is added, and other air-drying resins may be selected in addition to the air-drying unsaturated polyester resin. In this example, an air-drying unsaturated polyester resin was sprayed.
Surface treatment: and (4) checking the solidified quartz sand in the step I, and cleaning the loosened quartz sand by adopting a high-pressure air gun for blowing. Then spraying PMR release agent on the surface of the quartz sand in three times (even thin layer spraying), wherein the spraying interval is 15 +/-5 min (15 min in the embodiment), and enclosing the quartz sand with oil sludge, wherein the height of the oil sludge is 20mm in the embodiment.
Preparing a die: selecting two-component flexible silica gel for a mold, wherein the component A comprises the following components: the weight of the component B is 100: 2, the silica gel used in the embodiment is model 625 of Shenzhen Honye corporation.
And (3) glue solution is prepared and put for three times:
first configuration: weighing A, B components according to a proportion, mixing and stirring uniformly, vacuumizing and defoaming for 3-5 minutes, brushing the treated quartz sand surface (which can be brushed according to 800-1000 g/square meter) by using a brush, allowing the glue solution to adhere to the quartz sand surface, and standing for 20 +/-5 minutes.
And (3) second configuration: a, B components are weighed according to a proportion, 3mm chopped glass fibers are weighed, the weight of each chopped glass fiber is 0.5% -1.5% (1% in the embodiment) of the total weight of A, B components, A, B components and the chopped glass fibers are mixed, stirred uniformly, vacuumized, defoamed for 3-5 minutes, poured into a mold cavity surrounded by a former mold and oil sludge, the glue solution just submerges in quartz sand, kept stand for 20 +/-5 minutes, and then a layer of EWR180 glass fiber untwisted roving cloth is laid on the surface.
And (3) third configuration: weighing A, B components according to a ratio, mixing and stirring uniformly, vacuumizing and defoaming for 3-5 min, coating the glue solution on the surface of glass fiber untwisted roving cloth, then laying a layer of EWR180 glass fiber untwisted roving cloth, coating a layer of glue solution, standing for 30 +/-5 min, and demolding after curing. The operation of laying one layer of the EWR180 glass fiber untwisted roving cloth and then coating one layer of glue solution is carried out, the repetition times (the number of layers is large when the mold is large, and the number of layers is small when the mold is small) are set according to the needs, and finally the number of layers of the glass fiber untwisted roving cloth in the mold is 1-3.
Fourthly, demolding is carried out 24 hours after the glue solution is solidified, the silica gel mold is separated from the surface of the quartz sand, whether the surface of the mold is defective or not is checked, the defective part is repaired, the silica gel mold is manufactured, and irregular pits are formed in the surface of the silica gel mold.
When the product is used as a mold, after the product is molded, the silica gel mold can be conveniently uncovered from the product, and the product can duplicate the surface effect of the mold as it is, so as to obtain the glass fiber reinforced plastic product with the anti-skid surface (see fig. 1).
Claims (8)
1. A preparation method of a silica gel mold of a glass fiber reinforced plastic product with an anti-skid surface is characterized by comprising the following steps:
preparing a primary mold: preparing a flat surface according to the size of a silica gel mold to be manufactured, and cleaning the flat surface; after the flat surface is dried, spraying an unsaturated polyester resin layer on the surface to obtain a bottom coating, flatly paving quartz sand on the bottom coating resin layer, spraying resin with air drying performance on the surface of the quartz sand to obtain a surface coating, and waiting for the resin to be cured;
surface treatment: blowing the solidified quartz sand in the step I by using a high-pressure air gun, cleaning the loosened quartz sand, spraying a release agent on the surface of the quartz sand, and enclosing the periphery of the quartz sand by using oil sludge;
preparing a die: selecting two-component flexible silica gel for a mold, and preparing and putting glue solution for three times;
first configuration: weighing two-component flexible silica gel, mixing and stirring uniformly, vacuumizing and defoaming, brushing the quartz sand surface treated in the step two with a brush, and standing for 20 +/-5 min, wherein glue solution is attached to the quartz sand surface;
and (3) second configuration: weighing two-component flexible silica gel, weighing chopped glass fiber, mixing and stirring the two-component flexible silica gel and the chopped glass fiber uniformly, vacuumizing and defoaming, pouring into a mold cavity, allowing the glue solution to submerge quartz sand, standing for 20 +/-5 min, and spreading a layer of glass fiber roving cloth on the surface;
and (3) third configuration: weighing two-component flexible silica gel, mixing and stirring uniformly, vacuumizing and defoaming, coating a glue solution on the surface of glass fiber untwisted roving cloth, repeatedly paving a layer of glass fiber untwisted roving cloth and coating a layer of glue solution for 0-3 times, and demolding after curing;
fourthly, separating the silica gel mold from the surface of the quartz sand after the glue solution is solidified, checking whether the surface has defects, repairing the positions with the defects, and finishing the manufacture of the silica gel mold.
2. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: in the first step, the unsaturated polyester resin of the bottom coating is non-air-drying resin, wherein an accelerator and an initiator are added, and the thickness of the bottom coating is 0.2-0.5 mm.
3. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: in the step I, the resin with air-drying performance in the surface coating is air-drying resin or common resin added with air-drying agent.
4. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 3, wherein the silica gel mold comprises: in the step I, the thickness of the surface coating is 0.3-0.5 mm.
5. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: in the step I, the thickness of the quartz sand paved on the resin layer is 6-7 mm.
6. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: and step two, spraying the release agent on the surface of the quartz sand for three times, wherein the spraying interval is 15 +/-5 min each time.
7. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: and step three, brushing the surface of the quartz sand treated in the step two with a brush according to the square meter per 800-1000 g.
8. The method for preparing the silica gel mold of the glass fiber reinforced plastic product with the antiskid surface according to claim 1, wherein the method comprises the following steps: in the third step, the weight of the chopped glass fiber is 0.5-1.5% of the total weight of the double components.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210086324.6A CN114434828B (en) | 2022-01-25 | 2022-01-25 | Preparation method of silica gel mold of glass fiber reinforced plastic product with anti-slip surface |
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| CN202210086324.6A CN114434828B (en) | 2022-01-25 | 2022-01-25 | Preparation method of silica gel mold of glass fiber reinforced plastic product with anti-slip surface |
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| CN112575680A (en) * | 2020-12-04 | 2021-03-30 | 中铁第四勘察设计院集团有限公司 | Anti-slip anti-cracking terrace for steel structure plate surface and construction process of anti-slip anti-cracking terrace |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1963108A (en) * | 2006-12-12 | 2007-05-16 | 熊二明 | Quartz anti-skid brick and its preparing process |
| CN104552981A (en) * | 2014-11-21 | 2015-04-29 | 优利康达（天津）科技有限公司 | Method for integrally molding anti-skid layer on inner surface of hub cover body |
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