JPH0120103Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a centrifugal molding device comprising a cylinder rotatable around a horizontal axis and a supply device for supplying a catalyst-containing resin liquid into the cylinder. The present invention relates to a blend pump that is incorporated to blend a resin liquid and a catalyst.

The amount of resin liquid supplied must be adjusted according to the change in thickness of the resin tube to be centrifugally molded.
Furthermore, the amount of catalyst supplied needs to be adjusted depending on the amount of resin liquid supplied. Conventionally, these adjustments have been made by adjusting the capacity of the pump or operating valves, and these methods do not allow for easy adjustment.

An object of the present invention is to propose an apparatus that can accurately and easily adjust the supply amount of resin liquid and the mixing ratio of catalyst to resin liquid.

In other words, the present invention provides a centrifugal molding apparatus comprising a cylinder rotatable around a horizontal axis and a supply device for supplying a catalyst-containing resin liquid into the cylinder. An outer casing forming a sealed chamber in which a supply pipe and a catalyst-containing resin liquid discharge pipe communicate, a large-diameter piston that protrudes into the sealed chamber, and a small-diameter piston that protrudes into a cylinder chamber formed on the large-diameter piston. a catalyst supply pipe is connected to one end of the cylinder chamber, and
The present invention proposes a blend pump in a centrifugal molding device in which the other end communicates with the sealed chamber. According to this configuration, the catalyst-containing resin liquid contained in the closed chamber can be discharged and supplied by the piston movement of the large-diameter piston, and the supply amount can be adjusted by adjusting the piston stroke. Also, due to the movement of the small diameter piston against the large diameter piston,
The catalyst placed in the cylinder chamber can be placed in a sealed chamber and blended with a separately injected resin liquid, and at this time, the amount of catalyst blended can be adjusted by adjusting the piston stroke.

An embodiment of the present invention will be described above based on the drawings. In FIG. 1, reference numeral 1 has a cylindrical shape having end jigs 2 at both ends, and is supported by a plurality of wheels 3 so as to be rotatable around a horizontal axis 4. As shown in FIG. 5 is a supply device for supplying a catalyst-containing resin liquid 6 into the cylindrical mold 1, and a trolley 8 that can run while being guided by a rail 7;
It consists of a cylindrical shaft body 9 connected from the front of the truck 8 so as to be located on the horizontal axis 4, and a blend pump 10 and a mixer 11 provided on the truck 8, and a resin liquid containing catalyst from the mixer 11. The supply pipe 12 has a nozzle 13 provided at the tip of the tube shaft body 9.
is connected to. The blend pump 10 is a second
As shown in the figure. That is, 14 is an outer casing forming a sealed chamber 15, and this sealed chamber 15 includes a resin liquid supply pipe 17 having a one-way valve 16, and a resin liquid supply pipe 17 having a one-way valve 16.
8 is in communication with a catalyst-containing resin liquid discharge pipe 19. The resin liquid supply pipe 17 communicates with a resin liquid tank 21 via a pump 20, and the resin liquid tank 21 stores a resin liquid 22. The catalyst-containing resin liquid discharge pipe 19 communicates with the mixer 11 , and the mixer 11 has stirring blades 24 driven by a motor 23 . Reference numeral 25 denotes a large-diameter piston that penetrates one location of the outer casing 14 and projects into the sealed chamber 15. A cylinder chamber 26 is formed inside the piston, the plunge end of which is open. 2
7 is a small diameter piston that passes through one location of the outer casing 14 while facing the large diameter piston 25;
The inside thereof passes through the sealed chamber 15 and then enters the cylinder chamber 26. This small diameter piston 27
A discharge passage 28 is provided therethrough, and the outer end of this discharge passage 28 communicates with the sealed chamber 15 via a relay pipe 30 having a one-way valve 29 . Further, the outer end of the cylinder chamber 26 communicates with a catalyst tank 33 via a catalyst supply pipe 32 having a one-way valve 31 . Note that a catalyst 34 is stored in the catalyst tank 33.

In FIG. 2, the large diameter piston 25 is moved out and the small diameter piston 27 is moved together. As a result, the volume occupied by the large-diameter piston 25 in the sealed chamber 15 is reduced, so that the amount of resin liquid 22 is transferred from the resin liquid tank 21 to the sealed chamber 1.
Supplied within 5 days. Next, the small diameter piston 27 is moved forward relative to the large diameter piston 25. As a result, the cylinder chamber 26 is compressed, and the cylinder chamber 26
The catalyst 34 inside is connected to the closed chamber 15 via the relay pipe 30.
supplied to At this time, by adjusting the stroke of the small diameter piston 27, the catalyst 34 is supplied at an optimum ratio to the resin liquid 22 replenished (supplied) in the previous step. As a result, the catalyst-containing resin liquid 6 is accumulated in the sealed chamber 15. Next, the large diameter piston 25 is moved forward, and the small diameter piston 27 is moved together. As a result, the volume occupied by the large-diameter piston 25 in the sealed chamber 15 increases, so the catalyst-containing resin liquid 6
will be discharged to the mixer 11. At this time, by adjusting the stroke of the large-diameter piston 25, the amount of discharge, that is, the amount of supply from the nozzle 13 can be changed arbitrarily. Thereafter, by moving the small diameter piston 27 out of the large diameter piston 25, the cylinder chamber 26 can be replenished with the catalyst 34.

In the drawing, two pistons 25 and 27 are shown as one set, but this may be a single set or a plurality of sets. Note that in the case of multiple sets, the supply amount etc. can be changed by adjusting the number of sets to be activated.

According to the blend pump in the centrifugal molding apparatus of the present invention described above, the catalyst-containing resin liquid contained in the sealed chamber can be discharged and supplied by the piston movement of the large diameter piston, and the supply amount can be controlled by adjusting the piston stroke. Therefore, the supply amount of the catalyst-containing resin liquid can be adjusted accurately and easily. Furthermore, by the movement of the small-diameter piston relative to the large-diameter piston, the catalyst in the cylinder chamber can be placed in a sealed chamber and blended with the separately injected resin liquid. At this time, the amount of catalyst blended can be controlled by adjusting the piston stroke. Therefore, the mixing ratio of the catalyst to the resin liquid can be adjusted accurately and easily.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a longitudinal side view and FIG. 2 being an explanatory view of the main parts. DESCRIPTION OF SYMBOLS 1... Cylindrical type, 4... Horizontal axis, 5... Supply device, 6... Resin liquid containing catalyst, 10... Blend pump, 11... Mixer, 14... Outer tube body, 15
... Sealed chamber, 17 ... Resin liquid supply pipe, 19 ... Resin liquid discharge pipe containing catalyst, 21 ... Resin liquid tank, 2
2... Resin liquid, 25... Large diameter piston, 26...
Cylinder chamber, 27... Small diameter piston, 30... Relay pipe, 32... Catalyst supply pipe, 33... Catalyst tank, 34... Catalyst.

Claims (1)

[Scope of utility model registration request] In a centrifugal molding device comprising a cylindrical shape rotatable around a horizontal axis and a supply device for supplying a catalyst-containing resin liquid into the cylindrical shape, a blend pump of the supply device is connected to a resin liquid supply pipe and a catalyst-containing blend pump. It is composed of an outer casing forming a sealed chamber communicating with a resin liquid discharge pipe, a large diameter piston that projects into the sealed chamber, and a small diameter piston that projects into a cylinder chamber formed in the large diameter piston, and the cylinder 1. A blend pump for a centrifugal molding apparatus, characterized in that one end of the chamber communicates with a catalyst supply pipe, and the other end communicates with the sealed chamber.