JPS621516A - Molding device of braid-reinforced hose - Google Patents

Abstract

PURPOSE:To perform winding of a braid and covering of an outer tube without making the inner tube cool and cure, by a method wherein the inner tube in a molten state is held in a circular cross section by air, the braid is formed on the inner tube through an action of a rotating frame provided with bobbins performing reverse rotations in a confronting state each other and upon winding of the braid the outer tube is formed through covering. CONSTITUTION:The titled device is so constituted that an air blowing device making a tube 1 swelling out into a circular cross section by sending air into the molten state inner tube 1 is connected with an extrusion molding machine A and the air is blown off through an air blow-off hole 4 which is on the center of a die 3. An extrusion molding machine B for an outer tube 5 covers the outer tube 5 over a braid wound round the external circumferential surface of the inner tube 1 under a state of vacuum. The braid 6 is formed of reinforcing threads (a), (a') wound round bobbins 7 of rotating frames (C), (C') on the external circumferential surface of the inner tube 1 by turning the rotating frames (C), (C') in a possitive and negative directions respectively. Unification is made reliable by performing in this manner and a house whose quality is stable is molded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a forming apparatus for a braided reinforced hose in which a braid is built into the intermediate layer of the hose.

(Prior art) Today, various lightweight and flexible synthetic resin hoses have been developed in contrast to the conventional rubber hoses, and especially lightweight and flexible hoses have built-in braids to reinforce thin walls. .

This braided reinforced hose is generally formed by extrusion molding, reinforcing yarn is braided around the outer circumferential surface of a hardened inner tube using a braider, and an outer tube is coated thereon by extrusion molding.

That is, in conventional molding equipment, the extruded inner tube extruder is passed through a water bath to cool and harden it, and then a braid is wrapped around the hardened inner tube using a braider. Adhesive is applied immediately before the tube is wrapped, and the outer tube is dried after winding the braid.Then, the outer tube is coated with an extruder and cooled and hardened by passing it through a water tank again to complete the hose.

Therefore, from the extrusion of the inner tube to the braider.
Wrap the outer tube twice and wrap the outer tube twice.
During the process, devices such as a water tank and equipment for melting the tube surface with hot air are required, which requires a lot of molding equipment, making the molding process complicated, lengthening the molding line, and making it difficult to mold hoses with stable quality. There are some defects.

(Problems to be Solved by the Invention) In view of the above-mentioned conventional circumstances, an object of the present invention is to provide a forming device capable of wrapping a braid and covering an outer tube without cooling and hardening the inner tape. It is in.

(Means for Solving the Problems) The technical means of the present invention for solving the above problems is to arrange an extrusion molding machine for the outer tube in close proximity to the die in the extrusion molding machine for the inner tube, In addition, a rotating frame in which a plurality of upper thread and lower thread bobbins are arranged around the circumference is arranged around the extrusion molding die of the inner chive so as to rotate symmetrically and in opposite directions. .

The inner chest extrusion molding machine is equipped with an air blowing device for maintaining the extruded chest in a circular cross-sectional shape, and is also provided with a reinforcing warp payout mechanism as required.

(Function) The molten inner tube extruded by the extrusion molding machine is held in a circular cross-section by the air pumped into the tube by the air blowing device, and is held oppositely on the die of the molding machine. A braid is formed on the inner tube by the action of a rotating frame with a rotating bobbin, and the outer tube is coated immediately after winding the braid.

(Example) An example of the present invention will be described below based on the drawings.
A is an extrusion molding machine for the inner tube, B is an extrusion molding machine for the outer tube, C and C are rotating frames,
The extrusion molding machine A is of a type well known today, and may be used for extrusion of the surface of the tube, but in order to increase the strength of the molded hose, warp threads 2 are attached to the outer peripheral surface of the inner tube 1 along the axis as shown in the figure. Equipped with a warp thread feeding device (not shown) for attaching a plurality of threads.

In addition, the extrusion molding machine A contains a molten inner tube l.
An air blower (not shown) is connected to blow air into the tube 1 to inflate the tube 1 into a circular cross section.
Air is blown out from the central air blowing hole 4.

The extrusion molding machine B for the outer tube was placed close to the side end of the die 3 in the extrusion molding machine for the inner tube, and the braid was wound around the outer peripheral surface of the inner tube 1 by the action of a rotating frame described later. The outer tube 5 is coated under a vacuum condition, and the inner tube 1 is coated on the inner tube 1.
And the structure is such that it is tightly joined and integrated with the blade 6. In addition, when extracting the outer tube under vacuum conditions, a vacuum pump is connected to extrusion molding machine B, and the extrusion mold is also one for vacuum use.

The rotating frame C1C', which forms the blade 6 by winding the reinforcing yarn a in a braid around the outer circumferential surface of the inner chive 1, is arranged close to the die 3 of the extrusion molding machine A, and the rotating frame C1C'
is formed into a donut shape, and 6L bobbins 7 (8 in the drawing) each having reinforcing threads a wound thereon at equal intervals in the circumferential direction are attached to the frame, and such a rotating frame C1C is attached to the support frame 8. It is rotatably supported by a bearing 9 on the inside and by a plurality of support rollers 10 on the outside. Furthermore, rotating frame C
Boots 1) 11 and 12 are fixed to C and C, and belts 16 and 17 are wound around the pulleys 11 and 12 and transmission goose IJ 14 and 15 that rotate in opposite directions due to the rotation of the motor 13. The rotating frames C and C are configured to rotate in opposite directions.

The reinforcing yarns a and a wound around the bobbins 7 of the rotating frames C and C are guided to the front of the extrusion molding machine B of the outer tube 5, respectively, and extruded from the die 3 of the extrusion molding machine A in a molten state. Rotating frame C to improve the outer circumference of the inner tube 1
By rotating C and C in the forward and reverse directions, they are wound into 111 sets to form the blade 6. 1. ! IJ, the reinforcing thread a that can be wound around the bobbin 7 of the rotating frame C is used as the bobbin thread,
The reinforcing thread a, which can be wound around the bobbin 7 of the rotating frame C, is wound in a braided manner as an upper thread.

Note that the number of bobbins 7 to be attached to the rotating frame C2C is determined depending on the degree of reinforcement to be obtained.

The hose coated with the outer cheep 5 in extrusion molding machine B is then passed through a cooling water tank and a take-up machine to be wound up on a product winding machine. This structure is commonly used in manufacturing.

It should be noted that the present invention is not limited to the embodiments described above, but can of course be applied and modified in various ways without departing from the gist of the present invention.

(Effects of the Invention) As described in detail above, the braid-reinforced hose forming apparatus of the present invention is arranged so that the outer tube is placed close to the outlet of the inner tube extrusion molding machine to which the air blowing device is connected via piping so that air is blown into the inner tube. Place the molding machine,
Around the outer tube forming machine, a rotating frame in which a plurality of upper thread and lower thread bobbins are arranged on the circumference is installed so as to rotate in relative opposite directions, and the upper thread and lower thread are Since it is cross-wound on the exit of the inner tube extrusion molding machine and the outer tube can be coated, the process from inner tube extrusion to blade coating and outer tube coating is significantly shortened compared to conventional processes. Not only that, but also the molding can be simplified. Furthermore, since the braiding and coating of the outer tube are performed almost simultaneously on the molten inner cheek, the inner tube, grade and outer tube can be reliably integrated, and a hose with stable quality can be formed. I can do it.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view;
FIG. 2 is a longitudinal sectional side view taken along line (2)-(2) of FIG. In the figure, A: extrusion molding machine for inner cheap B: extrusion molding machine for outer tube C, C: rotating frame 1: inner tube 5: outer tube 6: blade 7: bobbin a: reinforcing thread (bobbin ) a′: Reinforcement thread (needle thread) Patent applicant: Toyox Co., Ltd. Figure 2

Claims (1)

[Claims] An outer tube forming machine is placed close to the outlet of the inner tube extrusion forming machine to which an air blowing device is connected via piping so that air can be blown into the inner tube. A rotating frame in which a plurality of bobbins are arranged on the circumference is installed so as to rotate in relative opposite directions, and the upper thread and lower thread are wound crosswise on the outlet of the inner tube extrusion molding machine, and the outer thread is immediately wound on the outer tube. A braided reinforcement hose forming device that coats the tube.