JPS6145492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a nozzle for supplying a resin liquid used in tube centrifugal molding.

FIG. 1 shows a resin liquid supply nozzle that has been commonly used in the past. That is, a catalyst-containing resin liquid jet port 1 is formed at the center, and a curing accelerator-containing resin liquid jet port 2 is formed at the outer periphery. According to this, a catalyst-containing resin liquid 3 and a curing accelerator-containing resin liquid 4 are ejected onto the inner circumferential surface of a rotating mold, and both resin liquids 3 and 4 are mixed on the inner circumferential surface to form a resin. The layers will be centrifugally formed. By the way, when the jetting of both the resin liquids 3 and 4 is stopped, the remaining resin liquids 3 and 4 are mixed near both the jet ports 1 and 2 due to surface tension, and harden especially near the catalyst-containing resin liquid jet port 1. and becomes lump 5. Therefore, when proceeding to the next operation (spraying), the catalyst-containing resin liquid jet port 1 that is blocked by the lump 5 will be able to jet out, and in order to solve this problem, it is necessary to restart the operation before restarting the operation. must be cleaned every time.

The present invention provides a resin liquid supply nozzle that can solve the above problems, and one embodiment thereof will be described below with reference to FIG. 2.

10 is a core, 11 is an inner cylinder fitted onto the core, 12
is an outer cylinder fitted further outside, and these 10, 1
1 and 12 are concentrically polymerized with an annular space created between them. A large diameter portion 10a is formed near the lower end of the core body 10, and this large diameter portion 10a
A seal ring 13 is attached to the outer surface of the catalyst-containing resin liquid passage 1 above the seal ring 13.
4, and the lower part is an inner air outlet 15. A catalyst-mixed resin liquid spout 16 is formed in the center of the core body 10, and the upper end of this catalyst-mixed resin liquid spout 16 communicates with the catalyst-mixed resin liquid passage 14. The space between the inner cylinder 11 and the outer cylinder 12 is formed into a curing accelerator-containing resin liquid passage 17, the lower end of which becomes a curing accelerator-containing resin liquid jetting port 18. An annular concave valley portion 19 is provided on the lower surface of the inner cylinder 11.
is formed. An annular air retention chamber 20 is formed near the lower end of the inner cylinder 11, and the lower end of an air supply passage 21 formed in the inner cylinder 11 in the length direction communicates with the air retention chamber 20. This air storage chamber 20
is connected to the inner air outlet 15 via the communication path 22.
An outer air outlet 23 communicating with the air reservoir 20 is opened within the concave valley portion 19 and below the curing accelerator-containing resin liquid outlet 18 .

According to the above configuration, the catalyst-containing resin liquid spout 16
The catalyst-containing resin liquid 24 ejected from the inner air outlet 15 is dispersed by high-pressure air 25 ejected from the inner air outlet 15, and the curing accelerator-containing resin liquid 26 is ejected from the curing accelerator-containing resin liquid outlet 18.
is dispersed by the air 25 ejected from the outer air ejection port 23. Both resin liquids 24 and 26 thus dispersed are mixed and proceed to curing. When the jetting of both the resin liquids 24 and 26 is stopped, the surface is The tension prevents both resin liquids 24 and 26 from merging and mixing.

Resin liquid supply nozzle 2 configured as above
An example of the use of 7 is shown in FIG.

That is, 31 is a mold having removable rings 32 attached to both ends thereof, and is rotatably supported around a horizontal axis 34 via a plurality of rollers 33 . 35
1 is a group of supply tubes for supplying resin liquid into the mold 31, and is configured to be insertable into and removed from the mold 31 from the other end opening side. That is, the supply pipe group 31 is attached to a support plate 30 erected from a truck 36, and the truck 36 is placed on rails 39 laid on a floor 38 via wheels 37. 40 indicates a traveling drive device. The supply pipe group 35 consists of a resin liquid supply pipe containing a curing accelerator, a resin liquid supply pipe containing a catalyst, and an air supply pipe. 41 is a supply device for the catalyst-containing resin liquid 24; 42 is a supply device for the curing accelerator-containing resin liquid 26; both supply devices 41 and 42 are connected to resin liquid tanks 43 and 44, pumps 45 and 46, and a blend pump 47; , 48, pressure vessels 49, 50, and valves 51, 52, and a catalyst tank 54 is communicated with the blend pump 47 of the catalyst-containing resin liquid supply device 41 via a valve 53, and a curing accelerator is mixed therein. The curing accelerator tank 5 is connected to the blend pump 48 on the side of the resin liquid supply device 42 via a valve 55.
6 are connected. a indicates compressed air. 57
shows an air supply pump having a flow rate regulating valve 58.

In FIG. 3, a corrosion-resistant resin layer A is formed on the inner circumferential surface 31a of the mold 31. As shown in FIG. This corrosion-resistant resin layer A is molded by inserting the supply tube group 35 into the mold 31 and then supplying both resins 24 and 26 from the nozzle 27 to perform centrifugal molding.

As described above, the resin liquid supply nozzle of the present invention has a catalyst-mixed resin liquid jet port formed in the center, an air jet port formed on the outer periphery, and a curing accelerator-mixed resin liquid jet port formed on the outer periphery. Since the annular concave valley is formed between the air outlet and the curing accelerator-containing resin liquid outlet, when the resin liquid is stopped being ejected from both resin liquid outlets, the concave valley is formed. By the presence of the resin and the formation of an air curtain by the air ejected from the air outlet, it is possible to prevent the two resin liquids from merging and mixing due to surface tension.
Therefore, good resin liquid jetting can always be expected without cleaning or the like. Further, by considering the direction of the air jetting port, the resin liquid can be dispersed (stirred) by the jetted air, thereby promoting mixing and curing of both resin liquids.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the main part showing a conventional example, FIG. 2 is a vertical cross-sectional view of the main part showing an embodiment of the present invention, and FIG.
The figure is a schematic explanatory diagram showing an example of use of the present invention. 10...core body, 11...inner cylinder, 12...outer cylinder, 15...
Inner air outlet, 16...Catalyst-mixed resin liquid outlet, 18...Curing accelerator-mixed resin liquid outlet, 19...
Recessed valley portion, 23... Outer air jet port, 24... Resin liquid containing catalyst, 25... Air, 26... Resin liquid containing curing accelerator, 27... Nozzle for supplying resin liquid.

Claims (1)

[Claims] 1 A catalyst-mixed resin liquid jet is formed in the center, an air jet is formed on the outer periphery, and a hardening accelerator-mixed resin liquid jet is formed on the outer periphery, and the air jet and the curing accelerator-mixed resin jet are connected. A resin liquid supply nozzle characterized in that an annular concave valley is formed between the resin liquid supply nozzle and the outlet.