JPH049517Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reinforcing material embedded during molding of a synthetic resin pipe joint.

[Conventional technology]

Pipe joints are connected to pipes in different directions during piping, so external force is applied to the joint itself in a twisting direction, and the joint itself is exposed to high water pressure during use. For this reason, conventional methods for reinforcing synthetic resin pipe joints include wrapping FRP around a vinyl chloride resin body, but there are problems in that wrapping is time-consuming and the appearance is poor. Attempts have also been made to insert a reinforcing material during molding, but this was not successful as the shape was complicated and some of the inserted reinforcing material was exposed.

[Problems to be solved by the invention] In view of the above-mentioned problems, the present invention embeds the reinforcing material body by insert molding during molding of the synthetic resin pipe joint body, and then embeds the reinforcing material body in the cavity by the injection pressure and flow of the resin. This is intended to prevent the main body of the reinforcing material from moving.

[Means for solving problems]

In this invention, a punching metal made of magnetic material is formed by press working and welding, and a through hole facing the gate of the mold is formed in the reinforcing material body which is embedded during molding of a synthetic resin pipe joint. A recess into which the tip of the magnet pin protruding from the mold into the cavity is fitted is formed at the location, and the reinforcing material body made of punched metal is embedded in the synthetic resin joint body to increase the reinforcing effect, and the insert During molding, the reinforcing material body made of punched metal does not impede the flow of resin, and the through holes on one side of the reinforcing material body allow the resin squeezed out from the gate of one mold to escape to the inner surface and be injected. This prevents the reinforcing material body from shifting due to being pushed by the resin, and the reinforcing material body is attracted to the magnet pins that protrude into the cavity from several places on the circumference of the mold, and the magnet pins engage with the recesses in the reinforcing material main body. This prevents the reinforcing material main body from moving due to the flow of the resin, and prevents the reinforcing material main body from being pressed by the resin and coming into contact with the cavity and exposing a portion thereof.

[Effect]

In this invention, a reinforcing material body made of punched metal is embedded in a synthetic resin pipe joint to provide reinforcement, and a through hole on one side of the reinforcing material body allows the resin to be squeezed out from the gate of one mold. The reinforcing material body is attracted to a magnet pin that protrudes from the mold into the cavity, and the magnet pin is engaged with the recess to prevent the reinforcing material body from moving due to the flow of resin. It is something that can be prevented.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

1 is a synthetic resin pipe joint formed by injection molding, and a reinforcing material body 2 made of punched steel sheet metal is inserted except for the tip of the socket.

The reinforcing material main body 2 is formed by pressing a punched metal of a steel plate, and is further formed by welding into a shape that is embedded within the thickness of the center portion of the pipe joint 1. Furthermore, a through hole 4 is formed in the reinforcing material main body 2 so as to face a gate port 8 opened in one of the mold cavities 3 of the mold 5a of the cavity 3 into which the reinforcing material main body 2 is inserted, and which has a larger diameter than the gate port 8. Furthermore, magnet pins 6 are provided protruding into the cavity 3 from multiple locations on the gate side and the opposite side of the molds 5a and 5b, and the tips of the magnet pins 6 are fitted into multiple locations on the circumferential surface of the reinforcing material body 2. A recess 7 is formed in which the

When molding the pipe joint 1, when the mold is opened, the recesses 7 of the reinforcing material body 2 are fitted into the plurality of magnet pins 6 protruding from one of the molds 5b, and at the same time they are attracted to the reinforcing material body 2. It is fixed to the mold 5b, and then the mold is clamped, and the magnet pin 6 protruding from the other mold 5a is attracted to the reinforcing material main body 2 and fitted into the recess 7. When the resin is injected, the other mold 5a The resin flows through the through hole 4 opened at the gate position, and the pressure of the resin from the gate does not push the reinforcing material body 2 to one side. Since the reinforcing material body 2 is attracted to several places and fitted into the recesses 7, the reinforcing material main body 2 is not moved by the resin flowing inside the cavity 3.

Incidentally, after the pipe joint 1 is taken out from the molds 5a and 5b, the recesses on the surface created by the magnet pins 6 are filled with vinyl chloride resin, FRP resin, etc. by burying them.

[Effect of idea]

According to the present invention, a punching metal made of a magnetic material is formed by press working and welding, and a through hole facing the gate of the mold is formed in the reinforcing material body which is embedded during molding of a synthetic resin pipe joint. Since we have formed recesses in several places on the circumference into which the tips of the magnet pins protruding from the mold into the cavity are fitted, the synthetic resin pipe fitting is reinforced by the reinforcing material body made of punched metal, and the pipe fitting is inserted into the pipe fitting. The pipe joint is less likely to be damaged by pipe connection work or water pressure, and the reinforcement does not damage the appearance of the pipe joint. Furthermore, when forming pipe joints, the main body of the reinforcing material is formed from punched metal with many punched holes to allow resin to flow to both the inside and outside surfaces, and through holes are formed facing the gate of the cavity. The reinforcing material body does not come into contact with the cavity due to pressure from the resin flowing out of the cavity, and the recesses formed in several places are fitted and attracted to the magnet pins protruding from several places in the mold. Therefore, the reinforcing material main body can be positioned at the center of the thickness of the pipe joint without moving the reinforcing material main body in the cavity due to the flow of the resin.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a pipe joint into which a reinforcing member is inserted, showing an embodiment of the present invention, FIG. 2 is a perspective view of the same reinforcing member, and FIG. 3 is a longitudinal sectional side view of the same during molding. DESCRIPTION OF SYMBOLS 1... Pipe joint, 2... Reinforcing material body, 3... Cavity, 4... Through hole, 5a, 5b... Mold, 6...
...Magnet pin, 7...recess.

Claims (1)

[Scope of utility model registration request] A punching metal made of magnetic material is formed by press working and welding, and a through hole facing the mold gate is formed in the reinforcing material body, which is embedded during the molding of a synthetic resin pipe joint. A reinforcing material for a synthetic resin pipe joint, characterized by forming a recess into which the tip of a magnet pin protruding from a mold into a cavity is fitted.