JPH0911305A - Method and apparatus for extrusion molding of synthetic resin - Google Patents

Abstract

PURPOSE: To obtain a method and apparatus for continuously extrusion molding a synthetic resin onto a metal plate having a series of molding units which moves intermittently. CONSTITUTION: The number of revolution of the driving motor 18 of an extruder 8 is interlocked with the actuation and stop of the driving motor 5 of a metal plate feeder 2 to make control possible, and an insertion member 14 which can move to make the resin passage 11 of an extrusion mold 9 attached to the extruder 8 communicate with a discharge hole 12 or an extrusion opening 10 is formed in the mold 9. The necessary and, minimum amount of synthetic resin is supplied from the extruder 8 to the mold 9 when the driving motor 5 of the feeder 2 is stopped and discharged from the discharge hole 12 of the mold 9. When the driving motor 5 of the feeder 2 is operated, an enough amount of the resin to obtain a prescribed resin form is supplied from the extruder 8 to the mold 9 and extruder from the opening 10 of the mold 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin extrusion molding method and apparatus.

[0002]

2. Description of the Related Art In a conventional extrusion molding apparatus, an extrusion die having a predetermined extrusion opening is attached to an extruder, and a resin passage for supplying molten resin from the extruder to the extrusion opening is connected to the extrusion opening of the extrusion die. Then, a molding metal plate is movably arranged in the extrusion opening of the extrusion die, a certain amount of resin is extruded through the resin passage into the extrusion opening by the extruder, and moving through the extrusion opening at a constant speed. A synthetic resin is extruded on a metal plate.

[0003]

The above-described extrusion molding apparatus of this type continuously extrudes a constant amount of resin from a predetermined extrusion opening, so that when the movement of the molded metal plate is stopped, a predetermined amount is obtained. Since it is not possible to obtain the resin shape of, it is necessary to stop the conveyed metal plate and perform the molding process, and to extrude the synthetic resin to the molded metal plate, each is done on a separate molding line. It was impossible to perform the molding process of the metal plate and the extrusion molding process of the synthetic resin for the molded metal plate in a series of molding lines.

An object of the present invention is to provide an extrusion molding method and apparatus for continuously extruding a synthetic resin into a series of intermittently moving metal sheets.

[0005]

The method of extruding a synthetic resin into a series of intermittently moving molded metal plates according to the present invention is such that the minimum amount of synthetic resin required when the drive motor of the metal plate feeder is stopped. From the extruder to the extrusion die, and when the drive motor of the metal plate feeding device is started, a sufficient amount of synthetic resin to obtain a predetermined resin shape is supplied from the extruder to the extrusion die and extruded. It is extruded from the extrusion opening of the mold.

The apparatus for extruding synthetic resin into a series of intermittently moving molded metal plates of the present invention is started by a metal plate feeding device for moving the molded metal plate in a fixed direction through an extrusion opening formed in an extrusion mold. The extruder that has a drive motor that stops the extrusion and that pushes the synthetic resin into the extrusion opening of the extrusion die is equipped with a drive motor whose rotation speed can be controlled in conjunction with the start and stop of the drive motor of the metal plate feeder. The extrusion die is provided with a nesting member which is provided and is movable so that the extrusion-type resin passage communicates with the discharge hole or the extrusion opening.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an extrusion molding apparatus for carrying out the extrusion molding method of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory view of an automatic manufacturing line for automobile moldings incorporating the extrusion molding apparatus of the present invention.

In FIG. 1, a metal plate A is wound around an uncoiler 1 in a coil shape. When the metal plate A is molded, the metal plate A is pulled out from the uncoiler 1 by a metal plate feeding device 2 and guided by a guide roll 3 to form the molding device. 4 is supplied. When the metal plate A reaches a predetermined position in the molding device 4,
The feeding operation is stopped by the metal plate feeding device 2, the molding device 4 is moved along the metal plate A in a direction opposite to the feeding direction of the metal plate A, and the molding device 4 causes the metal plate A to move to a predetermined position on both sides of the metal plate A. The bending process of the unit B of length is performed. When a unit B having a predetermined length and having a bending process is formed,
The metal plate feeding device 2 operates, and the metal plate A is molded again by the molding device 4
And the molding device 4 forms the next unit B. As a result, a unit B having a predetermined length of bending on both sides is provided in the molding device 4 in synchronization with the metal plate A being intermittently fed from the uncoiler 1 by the metal plate feeding device 2.
Will be formed continuously.

As shown in FIG. 2, the metal plate feeding device 2 comprises a mounting base 6 having a drive motor 5, and a plurality of upper rollers 7 and lower rollers 7 are attached to the mounting base 6 so as to face each other, and the motor 5 Is connected to the drive shafts of the rollers 7, 7, the metal plate A is interposed between the plurality of upper rollers 7 and the plurality of lower rollers 7, and the motors 5 rotate the rollers 7, 7 to Send out A. Therefore, the metal plate feeding device 2
The metal plate A interposed between the upper roller 7 and the lower roller 7 is intermittently moved in the feeding direction C by repeatedly starting and stopping the motor 5.

The metal plate A is supplied to the molding device 4 to supply the metal plate A.
The metal plate A having a series of molding units B that moves intermittently after the series of molding units B having a predetermined length of bending is formed on both sides of the metal plate A toward the extrusion die 9 attached to the extruder 8. Supplied. As shown in FIGS. 3 and 4, the extrusion die 9 has an extrusion opening 10 for extruding a resin layer having a predetermined shape into a molding unit B of the metal plate A, and a molten resin from the extruder 8 to the extrusion opening 10. A resin passage 11 for supplying
A discharge hole 12 for discharging the molten resin from the resin passage 11 to the outside of the extrusion die 9 is formed, and the resin passage 11 is formed through the extrusion opening portion 1.
0 is formed in the extrusion die 9, and a nesting member 14 for changing the flow path of the molten resin supplied from the resin passage 11 is movably attached in the extrusion die 9. A drive motor 16 is provided for forming a flow passage 15 for communicating the resin passage 11 with the discharge hole 12 and for moving the nesting member 14 to the upper position shown in FIG. 3 and the lower position shown in FIG.

The drive motor 16 of the nesting member 11 moves the nesting member 14 to the lower position shown in FIG. 4 when the drive motor 5 of the metal plate feeder 2 stops the movement of the metal plate A, and then the metal plate. When the drive motor 5 of the feeder 2 moves the metal plate A again, it operates in synchronization with the drive motor 5 of the metal plate feeder 2 so as to move the nesting member 14 to the upper position shown in FIG. Is done.

The extrusion die 9 has a resin passage 1 as shown in FIG.
1 is attached to an extruder 8 for extruding a molten resin through a flow hole 13 into an extrusion opening 10. The extruder 9 is provided with a hopper 17 for supplying synthetic resin and a drive motor 18 for operating the extruder 8. There is. The drive motor 18 of the extruder 8 can be controlled in association with the drive motor 5 of the metal plate feeding device 2 to control its rotation speed. When the drive motor 5 of the metal plate feeding device 2 is stopped, a minimum amount of synthetic resin is required. To the number of rotations to supply the resin passage 11 of the extrusion die 9, and when the drive motor of the metal plate feeding device 2 is started, a sufficient amount of synthetic resin to obtain a predetermined resin shape is supplied to the resin passage 11 of the extrusion die 9.
The number of rotations supplied to

The metal plate A having a series of forming units B arrives at a predetermined position of the extrusion die 9 by the drive motor 5 of the metal plate feeding device 2 and the metal plate feeding device 2 of the metal plate feeding device 2 is used to form the next unit B. The drive motor 16 of the insert member 14 synchronized with the drive motor 5 of the metal plate feeding device 2 when the drive motor 5 stops the movement of the metal plate A having the series of molding units B shows the insert member 14 in FIG. The resin passage 11 of the extrusion die 9 into the nesting member 14
Of the extruder 8 which is communicated with the discharge hole 12 through the flow passage 15 of the metal plate feeding device 2 and at the same time is linked with the drive motor 5 of the metal plate feeding device 2 to reduce the number of revolutions of the resin. From the resin passage 11 to the outside of the extrusion die 9 through the discharge hole 12 so that only the minimum required amount of resin is discharged while the metal plate A is stopped. When the forming unit B is formed on the metal plate A by the forming device 4 and the drive motor 5 of the metal plate feeding device 2 moves the metal plate A again, the drive motor 16 moves the nesting member 14 upward as shown in FIG. To the position, the resin passage 11 of the extrusion die 9 is made to communicate with the extrusion opening 10 through the flow passage 13, and at the same time, the drive motor 18 increases its rotation speed, and a sufficient amount of resin is obtained to obtain a predetermined resin shape. Extruder 8 Is supplied to the resin passage 11 of the extrusion die 9,
A certain amount of synthetic resin is extruded from the resin passage 11 through the flow passage 13 to the extrusion opening 10, and the molding unit B of the metal plate A moving through the extrusion opening 10 at a constant speed is extruded. Therefore, a certain amount of synthetic resin is extruded into the extrusion opening 10 when the metal plate A is moving, but when the movement of the metal plate A is stopped, the minimum necessary amount of resin is discharged through the discharge hole 12 to the extrusion die 9. It is designed to be discharged to the outside.

After the synthetic resin is extrusion-molded into each molding unit B of the metal plate A by the extrusion die 9, the series of molding units B is pulled out to the downstream side from the extruder 8 by the pull-out roller 19 and moved toward the downstream side. Extruder 8 while
The cooling device 20 arranged between the drawing roller 19 and the drawing roller 19 cools the series of molding units B, and the cutting device 21 arranged on the downstream side of the drawing roller 19 forms each molding unit b.
Then, the automobile moldings 22 in which the core material of each molding unit B is coated with the synthetic resin are manufactured.

[0015]

Since the present invention has the above-mentioned structure, the synthetic resin is always circulated through the extrusion die, so that the synthetic resin does not deteriorate and only the minimum necessary amount of the resin is required when the metal plate is stopped. Since it is economical because it is discarded and the extruder is always operated, it is possible to extrude a predetermined amount of resin immediately when the metal plate is moved, and thus it is possible to always provide the metal plate with a constant resin shape. Moreover, the molding process of the metal plate and the extrusion molding process of the synthetic resin for the molded metal plate can be automatically performed in one molding line.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of an automatic manufacturing line for automobile moldings incorporating the extrusion molding apparatus of the present invention.

FIG. 2 is a plan view of an extruder equipped with the extrusion die of the present invention and a metal plate feeder.

FIG. 3 is a partially longitudinal side view of the extrusion die in which the nesting member of the present invention is at the upper position.

FIG. 4 is a partially longitudinal side view of the extrusion die in which the nesting member of the present invention is in the lower position.

[Explanation of symbols]

 1 Uncoiler 2 Metal Plate Feeding Device 3 Guide Roll 4 Forming Device 5 Drive Motor 6 Mounting Platform 7 Upper Roller, Lower Roller 8 Extruder 9 Extrusion Mold 10 Extrusion Opening Portion 11 Resin Passage 12 Discharge Hole 13 Flow Passage 14 Nesting Member 15 Flow Passage 16 Drive Motor 17 Hopper 18 Drive Motor 19 Pulling Roller 20 Cooling Device 21 Cutting Device 22 Automotive Molding A Metal Plate B Forming Unit C Metal Plate Feeding Direction

Claims (2)

[Claims] 1. A method of extrusion molding a synthetic resin into a series of intermittently moving molded metal plates, wherein a minimum amount of the synthetic resin required when the drive motor of the metal plate feeder is stopped is transferred from the extruder to the extrusion mold. Supply and discharge through the discharge hole of the extrusion mold,
An extrusion molding method characterized in that a sufficient amount of synthetic resin for obtaining a predetermined resin shape is supplied from an extruder to an extrusion die and extruded through an extrusion opening of the extrusion die when a drive motor of a metal plate feeder is started. . 2. An apparatus for extrusion-molding a synthetic resin onto a series of intermittently moving molded metal plates, wherein the molded metal plate is moved in a certain direction through an extrusion opening of an extrusion die attached to an extruder. The extruder is equipped with a drive motor that repeatedly starts and stops, and the extruder that extrudes synthetic resin into the extrusion opening formed in the extrusion mold has its rotation speed linked to the start and stop of the drive motor of the metal plate feeder. An extrusion molding apparatus equipped with a nesting member, which is provided with a drive motor that is controllable, and is movable so that the resin passage of the extrusion mold communicates with the discharge hole or the extrusion opening.