JPH08332664A - Method and apparatus for extrusion molding of synthetic resin - Google Patents

Abstract

PURPOSE: To perform the extrusion molding of a synthetic resin on an intermittently moving metal plate having a series of molding units. CONSTITUTION: A resin is discharged from the discharge hole 9 of an extrusion mold 6 when the movement of a metal plate A having a series of molding units is stopped and extruded to the extrusion opening part 7 of the extrusion mold 6 when the movement of the metal plate A is performed to perform the extrusion molding of the synthetic resin and the telescopic member 11 allowing the resin passage 8 of the extrusion mold 6 to communicate with the discharge hole 9 and an extrusion opening part 7 is arranged on the extrusion mold 6 in a movable manner.

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 A conventional extrusion molding apparatus is equipped with an extrusion die having a predetermined extrusion opening, 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 constant amount of resin is extruded through the resin passage into the extrusion opening by the extruder, and the extrusion moves at a constant speed through the extrusion opening. A synthetic resin is extruded on a metal plate.

[0003]

The extrusion molding apparatus of this kind described above 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 of resin is extruded. 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 of the present invention is such that the resin is discharged from the discharge hole of the extrusion die when the movement of the molded metal plate is stopped. When the molded metal plate is moved, the synthetic resin is extruded on the molded metal plate by circulating the resin through the extrusion opening of the extrusion die.

The apparatus for extruding a synthetic resin onto a series of intermittently moving molding metal plates according to the present invention is a movable extrusion member that connects a resin passage of the extrusion die to a discharge hole and an extrusion opening. It is arranged.

[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, it is pulled out of the uncoiler 1 by a drive roller 2 for moving a metal plate and guided by a guide roll 3. While being supplied to the molding device 4. When the metal plate A reaches a predetermined position in the molding device 4, the feeding operation of the metal plate feed movement drive roller 2 is stopped, and the molding device 4 is moved along the metal plate A by the driving device provided in the molding device 4. The metal plate is moved in the direction opposite to the feeding direction, and the molding device 4 bends and molds the unit B having a predetermined length on both sides of the metal plate A. When a unit B having a predetermined length and having a bending process is formed,
The drive roller 2 for moving the metal plate is operated, and the metal plate A is supplied again to 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 continuously formed by the forming device 4 in synchronization with the metal plate A being intermittently fed from the uncoiler 1 by the metal plate feed movement drive roller 2. Will be formed.

The metal plate A is supplied to the forming 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 6 attached to the extruder 5. Supplied. As shown in FIGS. 2 to 4, the extrusion die 6 has an extrusion opening 7 for extrusion-molding a resin layer C having a predetermined shape into a molding unit B of the metal plate A, and the extruder 5 melts the extrusion opening 7 into the extrusion opening 7. A resin passage 8 for supplying a resin and a discharge hole 9 for discharging the molten resin from the resin passage 8 to the outside of the extrusion die 6 are formed, and a flow passage 10 for communicating the resin passage 8 with the extrusion opening 7 is provided with the extrusion die 6. And a flow passage for connecting the resin passage 8 to the discharge hole 9 in the insertion member 11 by movably mounting the nest member 11 for changing the flow passage of the molten resin supplied from the resin passage 8. 4 and the nesting member 11 is formed in the upper position shown in FIG.
A drive motor 13 for moving to the lower position shown in is provided.

The drive motor 13 moves the nesting member 11 to the lower position shown in FIG. 4 when the movement of the metal plate A is stopped by the drive roller 2 for moving the metal plate feed, and the drive roller 2 for moving the metal plate feed. Thus, when the metal plate A is moved again, it operates in synchronization with the motor of the metal plate feed movement drive roller 2 so as to move the nesting member 11 to the upper position shown in FIG.

The metal plate A having a series of molding units B arrives at a predetermined position of the extrusion die 6 by the driving roller 2 for moving the metal plate and the driving roller 2 is made of metal so that the molding apparatus 4 molds the unit B. When the movement of the plate A is stopped, the drive motor 13 moves the nesting member 11 to the lower position shown in FIG. 4, the resin passage 8 is communicated with the discharge hole 9 through the flow passage 12 of the nesting member 11, and the extruder 5 By discharging the molten resin supplied from the outside through the discharge hole 9 to the outside of the extrusion die 6, the resin is prevented from flowing out to the extrusion opening 7 while the movement of the metal plate A is stopped.
When the unit B is formed on the metal plate A and the drive roller 2 starts moving the metal plate A again, the drive motor 13 moves the nesting member 11 to the upper position shown in FIG. The molten resin supplied from the extruder 5 is communicated with the extrusion opening 7 through the passage 10, the molten resin is extruded into the extrusion opening 7, and the synthetic resin is injected into the molding unit B of the metal plate A moving through the extrusion opening 7. Extrude. Therefore, the synthetic resin is extruded into the extrusion opening 7 when the metal plate A is moving, but the synthetic resin is prevented from flowing out to the extrusion opening 7 when the movement of the metal plate A is stopped.

After a synthetic resin is extrusion-molded into each molding unit B of the metal plate A by the extrusion die 6, a series of molding units B are pulled out to the downstream side by the pull-out roller 14 and while moving toward the downstream side. A cooling device 15 arranged between the extruder 5 and the drawing roller 14 cools a series of molding units, and is cut into each molding unit B by a cutting device 16 arranged on the downstream side of the drawing roller 14, Thus, the moldings 17 for automobiles in which the core material of each molding unit B is coated with the synthetic resin are manufactured.

[0013]

According to the extrusion molding method and apparatus of the present invention, when the movement of the metal plate is stopped, the synthetic resin is not allowed to flow into the extrusion opening of the extrusion mold, but is discharged from the discharge hole of the extrusion mold. And the molding process of the metal plate and the extrusion molding process of the synthetic resin for the molded metal plate can be performed.
It can be done automatically in one molding line.

[Brief description of drawings]

FIG. 1 is an explanatory view of an automatic manufacturing line for automobile moldings in which an extrusion molding apparatus of the present invention is incorporated.

FIG. 2 is a front view of the extrusion die of the present invention.

FIG. 3 is a vertical cross-sectional side view of the extrusion die showing a state where the nesting member has moved to an upper position.

FIG. 4 is a vertical cross-sectional side view of the extrusion die showing a state where the nesting member has moved to a lower position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uncoiler 2 Drive roller for metal plate feed movement 3 Guide roll 4 Molding device 5 Extruder 6 Extrusion die 7 Extrusion opening 8 Resin passage 9 Discharge hole 10 Flow passage 11 Nesting member 12 Flow passage 13 Drive motor 14 Draw roller 15 Cooling device 16 Cutting device 17 Automotive molding A Metal plate B Molding unit C Resin layer

Claims (2)

[Claims] 1. A method of extrusion molding a synthetic resin onto a molding metal plate that moves intermittently, wherein the resin is discharged from a discharge hole of an extrusion die when the movement of the molding metal plate is stopped, and the molding metal plate is moved. A method of extruding a synthetic resin onto a molded metal plate by causing the resin to flow through the extrusion opening of the extrusion die when the above step is performed. 2. An apparatus for extrusion-molding a synthetic resin onto a molding metal plate that moves intermittently, wherein a nesting member that connects a resin passage of the extrusion die to a discharge hole and an extrusion opening is movable to the extrusion die. A synthetic resin extrusion molding device.