SU373158A1 - METHOD OF MANUFACTURING PRODUCTS FROM GLASS PLASTIC - Google Patents

Description

one

A known method for the manufacture of fiberglass products is carried out by molding a piece of chopped fiberglass, followed by impregnation with a binder composition and curing.

The proposed method differs from that in order to improve working conditions, the preform is molded by injecting fiberglass in a stream of air into a porous perforated shell, the size of the holes in which does not exceed the length of the individual glass fibers, after which the filled shell is placed in a rigid form and impregnated with a binder composition .

The essence of the method is illustrated by the example of the production of wagon roofs.

Pa figs. 1 shows a detachable form, covered with fiberglass; in fig. 2 - fiberglass coated form with a stretched glass mesh and a glass fiber receiving pipe; in fig. 3 - preform filled with fiberglass, prepared for impregnation; figure 4 - the workpiece during the impregnation of its resin; in fig. 5 - the obtained product with the casing removed before polymerization; in fig. 6 - finished product, separated from the mold after polymerization.

A steel casing / detachable form (see Fig. 1) is applied with a separating layer of fabric 2 with a clamp at the bottom of the flange 3. On.

the protrusions of the mold (see Fig. 2) pull the glass mesh 4 with the holes. A removable pipe 5 is installed on the glass mesh on top for receiving from the fiberglass pneumatic transport 6.

The glass mesh is covered over the surface with dense material 7, which by gradual rolling upward ensures uniform filling of the glass fiber and exit of the transporting air through the glass mesh.

A blank (see Fig. 3), consisting of two shells 2 and 4, the space between which is filled with cut glass glass fibers 6 with a length of 30-40 mm, is sealed with a casing

5 and under pressure of 23 atm for 10-15 minutes, impregnated with polyester resin (see Fig. 4). The air and the spent resin are removed through the nozzles.

The casing 8 is removed from the product obtained (see FIG. 5) and the product is sent to the polymerization chamber. After 30-45 minutes, the finished hardened product 9 (see Fig. 6) in a cooled state is removed from form 1 for flange 3.

25

Subject invention

A method of manufacturing fiberglass products by molding a preform of 30 chopped fiberglass followed by impregnation with a binder composition and curing, characterized in that, in order to improve working conditions, the preform is molded by injecting the fiberglass in a stream of air into a porous perforated shell.

the size of the holes in which does not exceed the length of the individual glass fibers, after which the filled sheath will be placed in a rigid form and impregnated with a bond with her composition.

FIG.

Fig 2 Pomietherese

FIG. B