JPS5930534B2 - Continuous manufacturing equipment for square hoses - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously manufacturing square synthetic resin hoses.

More specifically, the present invention relates to an apparatus for continuously transforming a hose formed into a cylindrical shape into a rectangular shape using a conventionally known synthetic resin hose molding apparatus. Although there have been many techniques for molding common cylindrical hoses, it has not been possible to continuously mold a flexible square hose.

When molding a rectangular hose, a cylindrical hose is molded and then cut to a certain length, and the hose is molded using the method and jig already proposed by the applicant in Japanese Patent Application No. 1983-6108. We had no choice but to rely on the so-called batch method, in which the shapes are transformed into square shapes. Therefore, production efficiency was poor and it was not possible to manufacture long hoses.

An object of the present invention is to improve production efficiency by continuously molding a highly flexible square hose, and to avoid hindrance to squaring the hose.

In order to solve this technical problem, the present invention has developed a hose forming machine that forms a cylindrical hose by rotating an extruded synthetic resin tape in a helical manner and adhering its side edges to each other. A tubular sleeve that is rotatably supported and protruded in synchronization with the hose on the same axis as the tubular sleeve, and a plurality of tubular sleeves that are formed so that their outer peripheral parts gather together on the outside of the tubular sleeve to form an imaginary rectangular tube whose base end is slightly thinner. The present invention discloses a technique for configuring a rectangular hose manufacturing apparatus with a circulation path, an endless running body that spans each circulation path, and a drive means that faces the inner circumference of the circulation path from the inside of the sleeve and intermittently moves the endless running body forward. This was done as a practical means.

According to this technical means, it is possible to continuously mold everything from extruded tape to square hoses by simply using the conventional hose molding machine and adding a square shaping device. .

Further, since the cylindrical hose is formed in advance and then deformed, the side edges of the tape are sufficiently bonded to each other, making it possible to obtain a square hose of good quality. Since the endless running body suddenly forms a corner in the hose immediately after it is formed by intermittent running, it is possible to reliably corner the square hose. The finish is extremely good, and there is no need for accessory devices such as rollers for squaring the hose on the outside of the hose.

Next, a specific example of the above technical means will be explained using the drawings.

The apparatus shown in the drawing is composed of an extruder A, a hose forming machine B, and a square shape forming apparatus C.

The extruder A is a commonly used extruder for synthetic resins, and in this example, two extruders, an extruder 2 for the soft synthetic resin tape 1 and an extruder 4 for the hard synthetic resin filaments 3, are used to extrude the soft synthetic resin tape 1. A tape T having a hard synthetic resin filament 3 attached thereon is formed. Forming machine B is a known hose forming machine, and in this embodiment, forming rolls 11, 11 groups that come together to form a virtual cylindrical surface and rotate in the same direction at a constant speed, and an axis parallel to forming roll 11 on the outside thereof. It is composed of a presser roll 16 having a The forming roll 11 is located inside a donut-shaped support plate 13 fixed to the front surface of the machine casing 12, protrudes in front of the support plate 13, and is shown along guide grooves 14 formed in the support plate 13 in a radial direction. Each forming roll 11 is pivotally supported at the inner end of a piece 15 that moves in the radial direction by a gear mechanism that does not move in the radial direction, so that the diameter of the virtual cylindrical surface formed by the group of forming rolls can be changed.

The rear end of the forming roll 11 faces into the machine casing 12 via a universal joint, and a gear mechanism housed within the machine casing 12 causes each forming roll 11 to rotate at the same speed and in the same direction. .

The presser roll 16 is a face plate fixed on the top of the piece 15.
The bending arm 18 is rotatably attached via a bearing to the distal end of a bending arm 18, which is attached so as to be movable up and down, so that the gap between the bending arm 18 and the group of forming rolls 11 can be adjusted. The surface shape of the presser roll 16 is the shape of the tape T 5
However, in this embodiment, a ring-shaped protrusion is provided and the surface is formed in a waveform.

In this forming machine B, when the tape T is wound around the group of forming rolls 11, each forming roll 11 moves at a constant speed in the same direction (
Because the tape rotates in the forward direction of the tape
rotates forward over 11 groups of forming rolls. At this time, the presser roll 16 is lowered and brought into contact with the tape T, and the presser roll 1
Press the overlapping part of the side edges of the tape T with the ridges of the waveform No. 6,
The hard strip 3 of the tape T, which is sent out sequentially, is guided on the wavy slope. Therefore, the tape T rotates forward in a spiral manner while slipping over the 11 groups of forming rolls, and the side edges of the tape T adhere to each other to form a hose. Then, it advances toward the tip of the forming roll 11. Square deformation device C
This is one of the features of the present invention, in which a bearing tube 21 is provided protruding from the machine casing 12 of the molding machine in a single-lid type with the same axis as the hose, and a cylindrical shaft 22 is inserted through a bearing inside the bearing tube 21 and is axially supported. However, the cylindrical shaft 22 is allowed to freely rotate.

A guide plate 24 having a narrow rear end width in the radial direction is fixed to the distal end of the cylinder shaft 22 via a frame 23. A small virtual rectangular tube is formed.

An endless roller chain 2 is attached to the periphery of each guide plate 24.
5 is wound so that it can circulate along the periphery (see Fig. 3).

A shaft 26 is inserted into the cylinder shaft 22, and its rear end faces toward the rear of the machine casing 12, and the shaft 26 is moved back and forth by a drive means (not shown). Ratchet pawls 28 corresponding to the number of guide plates 24 are fixedly attached to the tip head 27 of the shaft 26, and when the shaft 26 moves backward, the ratchet pawls 28 interfere with the roller chain 25 and lock the rollers. Run chain 25 and move shaft 2
6 moves forward, the roller chain 25 is stopped without interfering with the roller chain 25 (see FIG. 4). Therefore, the roller chain 25 simultaneously moves forward intermittently in the outer circulation path of the guide plate 24 as indicated by the arrows.

When the square deforming device C is arranged in front of the forming machine B in this way, the hose that rotates forward over the forming roll 11 group automatically advances onto the square deforming device C when it leaves the forming roll 11 group. However, the roller chain 25 in contact with the inner wall of the hose is intermittently moving forward, and the guide plate 24 around which the roller chain 25 is wound is supported by the cylinder shaft 22 which can freely rotate. Together, these do not impede the forward rotation of the hose.

Moreover, when the hose leaves the forming roll 11 group, it is still soft although it has cooled down slightly at room temperature. The hose is deformed into a rectangular shape as a section, and then cooled and hardened by the cooling means 29 to continuously form a rectangular hose.

In the above example, two extruders are used to create a tape with hard filaments attached to a soft tape. The tape may be embedded in the tape, or a single extruder may be used to extrude only a soft or hard tape.

In addition, the pressing roll of the molding machine has a corrugated surface with ring-shaped protrusions, but if the surface of the tape T' is flat, the surface 30 can be shaped into a cylindrical shape as shown in FIG. An annular bulging step 31 may be formed at the rear end, the cylindrical surface presses the adhesive side edge of the tape, and the step 31 guides the side edge of the tape to advance the hose forward. Furthermore, in the above embodiment, the forming machine used forming rolls that together formed a virtual cylindrical surface and rotated in the same direction at a constant speed, and was able to change the diameter of the virtual cylinder.
This forming machine is similar to other known hose forming machines, such as those in which the presser roll is removed from the above-mentioned forming machine and each forming roll is inclined by the pitch angle of the hose in the opposite direction to the tape traveling direction, or a cylindrical surface An endless belt may be used that runs spirally on the top of the cylinder and circulates from the tip of the cylinder into the cylinder.

In short, this molding machine may have any configuration as long as it is a hose molding machine capable of spirally rotating an extruded synthetic resin tape and adhering the side edges of the tape. Four guide plates are used in the square deformation device, but depending on the shape of the square hose, for example, if it is triangular, use three guide plates, and if it is hexagonal, use six guide plates to wrap around the roller chain and circulate. good.

In addition, although the square deformation device in the above embodiment is configured to freely rotate, a spline is formed at the rear end of the tube so as not to interfere with its back and forth movement. At the same time, the tube body itself may be rotated on its own axis in accordance with the rotation of the hose by an appropriate driving means.

In addition, in the above-mentioned example of the rectangular deformation device, the main components are a shaft that moves back and forth, a guide plate that is fixed to a tube body and rotates, and a roller chain that is wrapped around the guide plate. A rectangular tube is placed in front with the same axis as the hose, and endless belts are placed on each side of the rectangular tube, and the outside of the rectangular tube is circulated forward by an appropriate driving means, and the rectangular tube itself is rotated. Of course, a square deforming device configured to rotate in synchronization with the rotation of the hose may also be used.

[Brief explanation of drawings]

The drawings show an embodiment of the apparatus of the present invention, in which Fig. 1 is a right side view of the rectangular hose manufacturing apparatus, Fig. 2 is a cross-sectional view at the location shown in Fig. 1, and Fig. 3 is a guide plate in Fig. 2. FIG. 4 is a right side view of the head end of the shaft, and FIG. 5 is a right side view of a presser roll in another embodiment. A...Extruder, B...Hose forming machine,
C...Square deformation device, 11...Forming roll, 16...Press roll, 21...
Bearing tube, 22... Tube body, 24... Guide plate, 25... Roller chain, 28...
・Ratchet claw.

Claims (1)

[Claims] 1. A hose forming machine that forms a cylindrical hose by rotating an extruded synthetic resin tape in a spiral and adhering its side edges. A cylindrical shaft supported and protruded, a plurality of circulation paths formed so that the outer circumferential parts of the cylindrical shaft gather together on the outside of the cylindrical shaft to form an imaginary rectangular cylinder with a slightly narrower base end, and a plurality of circulation paths spanning each circulation path. 1. An apparatus for continuously manufacturing a rectangular hose, comprising: an endless running body; and a driving means that faces the inner circumference of a circulation path from the inside of a cylinder shaft and moves the endless running body intermittently forward.