Glass fiber reinforced plastic tank body and integral forming die and process thereof
Through integrated molding molds and processes, the existing fiberglass tank processing difficulties and high production costs are solved, a simpler and lower-cost production process is achieved, and the pressure bearing capacity and workers' health are improved.
Patent Information
- Application Number
- CN202510380377.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-05-06
AI Technical Summary
The existing fiberglass tank body is difficult to process, has high production costs, high labor intensity, and is not conducive to the health of workers.
The integrated mold and process are adopted to achieve integrated molding of the fiberglass tank body through the coordination of the outer mold and the inner mold, thereby eliminating the bonding and grinding process.
It simplifies the production process, reduces production costs and labor intensity, improves the pressure bearing capacity of the tank body, and improves the working environment and health of workers.
Smart Images
Figure CN119928127A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a glass fiber reinforced plastic tank body used for filtering a swimming pool. Background Art
[0002] At present, the container used for swimming pool filtration is commonly known as a filter sand tank. Most of its tank bodies are made of fiberglass, and mainly include an upper tank body and a lower tank body. They are first produced by molds and then bonded together at the joints. Because the surface of fiberglass is smooth, before bonding, the joint surface must be polished to make the joint surface rough before glue can be applied for bonding. We know that fiberglass is very hard, and it takes a lot of time and effort to polish it. There is too much dust during polishing, and the working environment is bad; and the labor intensity of workers is high (because the upper and lower tank bodies are hemispherical or U-shaped shells, workers have to bend their bodies when polishing to grind the inner surface of the tank body). Therefore, the processing of the fiberglass tank body of the current filter sand tank is difficult, the production cost is high, and it also increases the labor intensity of the work and is not conducive to the health of workers. Summary of the invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a glass fiber reinforced plastic tank body with a simpler and more reasonable structure, lower production cost and better pressure bearing capacity.
[0004] Another object of the present invention is to provide an integral molding die for the above-mentioned fiberglass reinforced plastic tank body.
[0005] Another object of the present invention is to provide a forming process for the above-mentioned glass fiber reinforced plastic tank body.
[0006] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: A glass fiber reinforced plastic tank body is a glass fiber reinforced plastic tank body container formed in one piece.
[0007] An integrated molding die for a glass fiber reinforced plastic tank body, comprising an outer mold and an inner mold, wherein: The outer mold is divided into an upper mold and a lower mold that are closed and docked together, and both are provided with docking locking edges at the interface; an air suction port is provided on the upper mold; and a feed port is provided on the lower mold; The inner mold is a soft mold that can be inflated and deflated; a charging and deflation interface is provided at the upper end of the inner mold.
[0008] In an improved solution to the above-mentioned one-piece molding mold for a fiberglass tank body, the air suction port is arranged at the upper end of the upper mold; and the feed port is arranged at the bottom of the lower mold.
[0009] An integrated forming process of a glass fiber reinforced plastic tank body comprises the following steps: 1). Inflate the inner mold and cover or wrap glass fiber around the outer surface of the inner mold; 2). Place the fiber-covered inner mold into the lower mold, cover the upper mold, and then lock the upper and lower molds by bolts or vacuum locking; 3). Connect an air extraction pipe to the air extraction port of the upper mold, connect a resin introduction pipe to the feed port of the lower mold, and then start to extract air and introduce resin; 4). Allow the resin in the mold to solidify; 5) Demolding: After unlocking the upper and lower molds, take out the upper mold, deflate the inner mold, take out the inner mold, and finally take out the product - the one-piece FRP tank body.
[0010] In an improved solution to the one-piece molding process of the glass fiber reinforced plastic tank body, a gel coat is sprayed on the inner walls of the upper mold and the lower mold in advance.
[0011] In an improved solution to the one-piece molding process of the above-mentioned FRP tank body, before the outer surface of the inner mold is covered with glass fiber or wrapped with glass fiber, an embedded part is first placed on the upper end or lower end of the inner mold.
[0012] Compared with the prior art, the present invention has the following beneficial effects: since the FRP tank body is formed in one piece rather than being bonded together by an upper and lower cylinder body, the time-consuming and labor-intensive grinding process before bonding, which produces a lot of dust and pollution, is omitted; and the strength of the one-piece formed tank body to withstand the pressure inside the container is greater than that of the tank body formed by bonding an upper cylinder body and a lower cylinder body; therefore, the present invention has a simpler and more reasonable structure, lower production costs, better pressure-bearing capacity, and greatly reduces the labor intensity of the work and is beneficial to the health of the workers.
[0013] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic cross-sectional view of an embodiment of the present invention; Figure 2 is a three-dimensional schematic diagram of a molding die according to an embodiment of the present invention; Figure 3 is an exploded schematic diagram of a molding die according to an embodiment of the present invention; Figure 4 yes Figure 3 sectional view of . DETAILED DESCRIPTION
[0015] The present invention is a glass fiber reinforced plastic tank body, such as Figure 1 As shown, a glass fiber reinforced plastic tank container 1 is formed in one piece.
[0016] The one-piece forming mold of the glass fiber reinforced plastic tank body of the present invention is as follows: Figures 2 to 4 As shown, it includes an outer mold 2 and an inner mold 3, wherein: The outer mold 2 is divided into an upper mold 21 and a lower mold 22 that are closed and butted together, and they are both provided with butt-jointed locking edges 211, 221 at the interface; a plurality of through holes 2111, 2211 for installing locking bolts are provided on the butt-jointed locking edges 211, 221 of the upper mold 21 and the lower mold 22; an air extraction port 212 is provided on the upper mold 21; and a feed port 222 is provided on the lower mold 22; The inner mold 3 is a soft mold that can be inflated and deflated; a charging and deflation interface 31 is provided at the upper end of the inner mold 3 .
[0017] The forming process of the glass fiber reinforced plastic tank body of the present invention comprises the following steps: 1. Spraying gel coat on the inner wall of the upper mold 21 and the lower mold 22 to obtain a smooth surface of the can body. Of course, spraying gel coat is not necessary when it is not necessary; 2. Inflate the inner mold 3 and cover or wrap glass fiber on the outer surface of the inner mold; 3. Place the fiber-covered inner mold 3 into the lower mold 22, cover the upper mold 21, and then use bolts to penetrate the through holes of the butt-locking edges to lock the upper mold 21 and the lower mold 22; of course, vacuum locking or other methods can also be used to lock the upper mold 21 and the lower mold 22; 4. Connect an exhaust pipe to the exhaust port 212 of the upper mold 21, connect a resin introduction pipe to the feed port 222 of the lower mold 22, and then start exhausting. With the help of negative pressure, the resin can be introduced into the space enclosed between the inner and outer molds. The temperature, introduction speed and exhaust speed of the resin can be easily obtained by testing the upper cylinder body or the lower cylinder body of the glass fiber reinforced plastic tank body formed separately at this stage, and will not be described in detail here. 5. Allow the resin in the mold to solidify. The solidification time can be easily obtained through experiments based on the thickness and size of the tank, so it will not be described in detail here. 6. Demolding: Open and unscrew the bolts, take out the upper mold, deflate the inner mold, take out the inner mold, and finally take out the product - the one-piece fiberglass tank body.
[0018] As can be seen from the above, since the FRP tank body is integrally formed instead of being bonded by an upper and lower cylinder body, the time-consuming and labor-intensive grinding process before bonding, which produces a lot of dust and pollution, is omitted, and the integrally formed tank body has a greater strength to withstand the pressure inside the container than the tank body formed by bonding an upper cylinder body and a lower cylinder body. Therefore, the structure of the present invention is simpler and more reasonable, the production cost is lower, the pressure bearing capacity is better, and the labor intensity of the work is greatly reduced and it is beneficial to the health of the workers.
[0019] Since the fiberglass tank body of the swimming pool sand filter requires a water inlet, a drain outlet, etc., the mold core is pre-set in the upper mold and the lower mold.
[0020] In addition, since the upper part of the swimming pool filter sand tank needs to be connected to the cover plate and the bottom needs to be connected to the base, the connecting parts (commonly known as embedded parts) can be pre-embedded when the fiberglass tank body is integrally formed, so as to facilitate the connection with the cover plate or the base during the subsequent installation and use. To this end, before laying glass fiber on the surface of the inner mold or winding glass fiber, the embedded parts 4 are first placed on the outer upper end or lower end of the inner mold.
[0021] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.
Claims
1. A glass fiber reinforced plastic tank body, characterized in that: It is an integrally formed fiberglass tank container.
2. An integral molding die for a glass fiber reinforced plastic tank body as claimed in claim 1, comprising an outer mold and an inner mold, characterized in that: The outer mold is divided into an upper mold and a lower mold that are closed and docked together, and both are provided with docking locking edges at the interface; an air suction port is provided on the upper mold; and a feed port is provided on the lower mold; The inner mold is a soft mold that can be inflated and deflated; a charging and deflation interface is provided at the upper end of the inner mold.
3. An integral molding die for a glass fiber reinforced plastic tank body as claimed in claim 2, characterized in that: The air extraction port is arranged at the upper end of the upper mold; and the feed port is arranged at the bottom of the lower mold.
4. A process for forming a glass fiber reinforced plastic tank body using the integral forming mold according to claim 2, characterized in that: The steps include: 1). Inflate the inner mold and cover or wrap glass fiber around the outer surface of the inner mold; 2). Place the fiber-covered inner mold into the lower mold, cover the upper mold, and then lock the upper and lower molds by bolts or vacuum locking; 3). Connect an air extraction pipe to the air extraction port of the upper mold, connect a resin introduction pipe to the feed port of the lower mold, and then start to extract air and introduce resin; 4). Allow the resin in the mold to solidify; 5) Demolding: After unlocking the upper and lower molds, take out the upper mold, deflate the inner mold, take out the inner mold, and finally take out the product - the one-piece FRP tank body.
5. A process for forming a glass fiber reinforced plastic tank body using the integral molding die as claimed in claim 4, characterized in that: The gel coat is sprayed on the inner walls of the upper mold and the lower mold in advance.
6. A process for forming a glass fiber reinforced plastic tank body using the integral molding die as claimed in claim 4, characterized in that: Before the outer surface of the inner mold is covered with glass fiber or wrapped with glass fiber, an embedded part is first placed on the upper end or the lower end of the inner mold.