JPH10138338A - Apparatus for molding end part socket of plastic pipe material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a socket-molding mold without stopping a line by providing a mold supporter in a manner reciprocally movable in the axial direction of a pipe material and providing a mold guide for laterally delivering a mold between the mold supporter and a mold replacing stand to the front end of the mold supporter and the front end of the mold replacing stand. SOLUTION: An apparatus for molding the socket of a plastic pipe material is equipped with a mold supporter 1 and a hydraulic clamp 11 and provided on a base stand 12 in a reciprocally movable manner. The base part 32 of a mold to be replaced is released from the mold supporter 1 by the operation of the hydraulic clamp 11 and this released mold to be replaced is laterally guided and moved from the mold supporter 1 to a front mold replacing stand 21 to be drawn out. The mold supporter 1 is allowed to retreat just beside a rear mold replacing stand 22 and the replacing mold preset to the rear mold replacing stand 22 is guided and moved from the rear mold replacing stand 22 to the mold supporter 1 to be positioned just before the mold supporter 1 to be clamped by the operation of the hydraulic clamp 11 to advance the mold supporter 1 to the original position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a socket at one end of a plastic tube.

[0002]

2. Description of the Related Art As a pipe material for various fluid pipes, a plastic pipe having a receiving port formed at one end is often used, and the connection of the pipe material is performed by a receiving port / insertion method. The manufacturing process of the plastic tube material includes an extrusion stage for extruding a plastic tube, a fixed-size cutting stage for cutting the extruded plastic tube to a fixed size, and a fixed size sent from the extrusion and fixed-size cutting stage. A heating stage for heating one end of the cutting tube
And a receiving molding stage for forming a receiving port at one end of a fixed-length cut tube sent from the heating stage.

[0003] In the production of this plastic tube material, if the extrusion speed of the plastic tube is v and the cut length of the fixed length is L, the cut length of the fixed cut tube is downstream of the fixed cut stage at intervals of time L / V. Will be sent to. Therefore, at each stage downstream of the fixed-length cutting stage, each operation must be completed within the time L / V to prevent accumulation of the fixed-length cutting tube at the stage.

[0004] In the above-mentioned receiving mold stage, one end of the cut tube is heated and softened in the preceding stage, and the other end is pressed by a pusher, and one end is pressed into a receiving mold. And
After cooling, it is pulled out of the receiving mold.

[0005]

In the production of the above-mentioned plastic tube, it is sometimes required to change the size of the receiving port while keeping other conditions as it is. In this case, it is necessary to replace the receiving die. Conventionally, the die to be replaced is held by the hoist ⇒ The fastening of the die to be replaced from the die supporter by operating the hydraulic clamp ⇒ The hoist Removal of the mold to be replaced by operation ⇒ Release of the mold to be replaced from the hoist ⇒ Holding of the replacement mold by the hoist ⇒ Transfer of the replacement mold to the front end of the mold supporter by operating the hoist ⇒ By operating the hydraulic clamp Conclusion of exchange mold with mold supporter⇒
The die is replaced by a series of operations such as release of the hoist from the fastening die.

[0006] However, this mold change requires a considerable time, and the feed time interval L /
It is difficult to change the mold within V, and it is often necessary to stop the line. The purpose of the present invention is
When forming a port at one end of a fixed-length cut tube that is sent one after another at short intervals, when the dimensions of the port are changed, the die for forming the port is changed in a very short time, and the line is changed. An object of the present invention is to make it possible to replace a receiving mold without stopping.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for forming a port at an end of a plastic pipe material, which is formed by cutting an extruded plastic pipe to a fixed length and forming a port at one end of the pipe material to be fed. A mold supporter is provided so as to be able to reciprocate in the axial direction of the tube, and two mold exchanging tables are fixedly mounted on the side of the reciprocating path, and the front end of the mold supporter and each mold are provided. At the front end of the exchange table, there is provided a mold guide for transferring the mold between the mold supporter and the mold exchange table from the lateral direction.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an apparatus for forming an end of a plastic tube material according to the present invention.
In FIG. 1, reference numeral 1 denotes a mold supporter, which includes a hydraulic clamp 11 for fastening the mold, and is provided on a base 12 so as to be able to reciprocate in the direction of the arrow. Reference numerals 21 and 22 denote mold exchanging stands fixed on one side of the base 12 at predetermined intervals in the longitudinal direction of the base, and are fixed on the side base 23. Reference numeral 3 denotes a mold, which is provided with a socket forming portion 31 and a base portion 32.

Reference numeral 24 denotes a guide roller attached to the front end of each of the mold exchanging tables 21 and 22, and 14 denotes a guide roller attached to the front end of the mold supporter 1. It is provided to smoothly transfer the mold between the two when the supporter is positioned, and a vertical roller with which the upper end of the rear end face of the mold base 32 contacts. A horizontal roller is provided on the lower surface of the rear end of the mold base 32.

The mold supporter and the mold exchanging table are provided with means capable of slidably supporting the mold, for example, a protrusion is provided on a base of the mold, and the protrusion can be slid. Are provided. FIG. 2 shows a production line for plastic tubing, in which a port forming apparatus A according to the present invention is installed at one end of a port forming stage.

In FIG. 2, the tip of the plastic tube pushed out of the extruder 511 is connected to the limit switch 51.
2, the cutter 513 rotates, and the rotary cutter 513 travels at the same speed as the plastic pipe. During this travel, the cutting of the pipe proceeds, and when the cutting of the plastic pipe ends, the rotation of the cutter 513 stops. Then, the cutter 513 returns from the plastic tube to its original position,
When the cut pipe is separated from the rear uncut pipe by the fast-forward roller 514, and the tip of the rear uncut pipe contacts the limit switch 512, the above operation is repeated and the cutter 513 is turned off. With the distance L between the initial position and the limit switch 512 as a fixed length, the plastic tubes are cut one after another. Therefore, assuming that the extrusion speed of the plastic tube is V, and the distance from the initial position of the cutter to the limit switch is L, a fixed length cut tube is sent to the tube receiving roll 515 every L / V time.

The fixed-length cut pipe is fed from the pipe receiving roller 515 to the pipe receiving grooves 517, 51 of the pipe receiving bars 516, 516.
7, the heater 518 is moved to be inserted through one end of the fixed-length cutting tube, and the fixed-length cutting tube is inserted into the driving roll 51.
9 to heat one end of the fixed length cutting tube.
When the heating is completed, the heater 518 is detached from one end of the fixed-length cut tube by its own movement, and the tube material receiving groove 5 is removed.
The fixed-length cut pipe is lifted by the pipe lifts at 17 and 517, exits the pipe material receiving grooves 517 and 517, and
16 and 516 to roll on the adjacent tube receiving grooves 520 and 52
Populated with 0. Further, the other end of the fixed-length cut tube is pressed by a pusher 521, and one end is pressed into the receiving mold forming die 3 of the fixed-length cut tube to be formed into a receiving opening. From the tubing, and then the tube is
From 0,520, the tube escapes by raising the tube lift in the receiving groove, and is transferred to the tube carrier 522 by rolling of the tube material itself.

FIGS. 3 (a) to 3 (d) show the receiving line forming die while continuing the extrusion of the plastic tube, the cutting of the extruded tube, and the transfer of the cut tube in the production line. Shows the work procedure for replacing the. FIG.
This shows the normal arrangement of the dies during the receiving port forming operation, and the dies supporter 1 is located right beside the dies exchange table 21 in front.

In order to replace the mold, the base portion 32 of the mold 3a to be replaced is released from the mold supporter 1 by operating the hydraulic clamp 11, and as shown in FIGS. As shown,
The released mold to be replaced 3a is laterally guided from the mold supporter 1 to the front mold exchanging table 21 and removed. Thereafter, as shown in FIGS. 3B to 3C, the mold supporter 1 is retracted to the side of the rear mold exchanging table 22, and is set on the rear mold exchanging table 22 in advance. As shown in (c) to (d) of FIG.
The guide is further moved to the mold supporter 1 so as to be positioned immediately before the mold supporter 1, and then this exchanged mold is fastened to the mold supporter by operating the hydraulic clamp 11, and finally, the mold supporter is moved. The mold supporter 1 is moved forward and fixed to the initial position shown in FIG. 3A, and the mold exchanging operation is completed.

FIGS. 4A to 4D show another example of an operation procedure for exchanging the receiving mold. In this mold exchanging operation procedure, first, as shown in FIG. 4A, the mold supporter 1 is moved backward just beside the rear mold exchanging table 21 with the exchanged mold 3a mounted. . Thereafter, the base portion 32 of the mold 3a to be replaced is released from the mold supporter 1 by operating the hydraulic clamp 11, and FIG.
As shown in FIG. 7, the released mold 3a to be replaced is laterally guided from the mold supporter 1 to the rear mold exchanging table 22, and is removed. Thereafter, as shown in FIG. 4C, the mold supporter 1 is advanced to the initial position, and the exchange mold 3b set in advance on the front mold exchange table 21 is replaced with the exchange mold 3b shown in FIG. As shown in (d), the guide is moved from the front mold exchanging table 21 to the mold supporter 1 so as to be positioned immediately before the mold supporter 1, and then the exchange mold 3b is moved to the mold supporter. The metal clamp 1 is fastened to the rotor 1 by the operation of the hydraulic clamp 11, thereby completing the mold replacement operation.

The time required for the above-mentioned mold exchange is about 45 seconds, and the time is significantly shorter than the time interval for feeding the fixed-length cut tube. After that, the exchange of the mold is completed by the time the next fixed-length cut tube is received, and one end of the received fixed-length cut tube can be molded into the receiving port with a sufficient time margin.

In the above embodiment of the port forming apparatus according to the present invention, both the front mold exchanging table and the rear mold exchanging table are provided on the same side of the reciprocating path of the mold supporter. ,
Supporting the front mold changer (or the rear mold changer) with mold support
A rear mold exchange table (or a front mold exchange table) may be fixed to one side of the reciprocating path of the mold supporter on the other side of the reciprocating path of the mold supporter.

[0018]

In the apparatus for forming the end of the plastic tube material according to the present invention, the replacement mold can be set in advance on one of the mold exchange tables in advance, and the mold can be extremely reduced. Since the extruded plastic tube is cut to a fixed size and the receiving port is formed at one end of the tube material that is sent one after another at short intervals, it can be replaced in a short period of time. The mold can be exchanged, and even at the time of mold exchange, the receiving mold can be formed and sent out with the exchange mold without passing through the fixed-length cut tube that is sent, and pipe materials with different receiving dimensions can be manufactured without stopping the line. You can switch to

[Brief description of the drawings]

FIG. 1 is a view showing an apparatus for forming an end of a plastic pipe end according to the present invention.

FIG. 2 is a drawing showing a production line for a plastic pipe in which the port forming apparatus according to the present invention is used.

FIG. 3 is a view showing an example of a work procedure of a mold exchanging work in the mouthpiece forming apparatus according to the present invention.

FIG. 4 is a view showing another example of the operation procedure of the die exchanging operation in the port forming apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die supporter 14 Guide roller 21 Die exchange table 22 Die exchange table 24 Guide roller 3 Die

Claims (1)

[Claims] 1. An apparatus for forming a receiving port at one end of a pipe material to which an extruded plastic pipe is cut to a fixed size and sent, wherein a mold supporter is provided so as to reciprocate in the axial direction of the pipe material. ,
Two mold exchange tables are fixed on the side of the reciprocating path,
A mold guide is provided at the front end of the mold supporter and at the front end of each mold exchange table for transferring the mold between the mold supporter and the mold exchange table from a lateral direction. Port forming device for plastic tube end.