JPH10296794A - Bed for rotary injection molding machine having three clamping devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make firm the relative connection between beds by using fixing with bolts and connecting steel plates jointly and prevent the deformation of a connecting portion above the beds caused by a reaction force of a nozzle touch. SOLUTION: An injector is placed on a turn table 3 provided on an upper surface of a bed 2 and three clamping devices are provided along the circumference of the turn table in a radial fashion together with the bed. A reinforcing steel plate 10 is interposed between side walls 11, 12 of the bed 2 on an injection side and a bed 7 on a clamping side, and the beds are connected to each other together the reinforcing steel plate 10 with a bolt 13. A connecting steel plate 18 is extended over an upper surface of the connecting end between the beds for retention to the upper surface of the beds with bolts 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed of a molding machine capable of injecting material resin for each mold clamping device by rotating one injection device with respect to three mold clamping devices.

[0002]

When an injection molding machine becomes large, a bed is divided into an injection side and a mold clamping side due to circumstances such as transportation, so that the bed can be disassembled and assembled so as to be integrated at the time of installation after transportation. However, in a rotary injection molding machine in which an injection device is mounted on a turntable provided on the upper surface of a bed and a plurality of mold clamping devices are radially arranged along the circumference of the turntable. The bed is manufactured separately for each of the injection device and each mold clamping device, and is integrated at the time of installation, since the transportability is inferior if an integrated bed is used due to the large number of constituent devices.

The beds are connected to each other by bolts for easy assembly and disassembly. However, the reaction force of the nozzle touch is concentrated on the joint portion with the mold clamping side bed as the pulling force of the injection side bed. Another problem is that the bed above the portion where the beds are bolted to each other is easily deformed by repeated nozzle touches.

The present invention has been conceived in order to solve the above-mentioned problems, and an object of the present invention is to provide a solid connection between beds by using a combination of bolts and a connecting steel plate, and at the same time, a nozzle touch. Another object of the present invention is to provide a new rotary injection molding machine bed that can prevent deformation of the joint portion above the bed due to the reaction force of the injection molding machine.

[0005]

According to the present invention, the injection device is mounted on a turntable provided on the upper surface of a bed, and three mold clamping devices are radially arranged together with the bed along the circumference of the turntable. In the revolving injection molding machine arranged so that the injection device can be adapted to each mold clamping device by revolving movement, a reinforcing steel plate is interposed between side walls of the injection side bed and the mold clamping side bed, and the reinforcing steel plate is provided. And the beds are joined together by bolts, while a connecting steel plate is hung over the joint upper surfaces of the beds, and the connecting steel plates are fastened to the upper surface of the bed by bolts.

[0006] In such a bed, the tensile force at the joint portion of the beds caused by the nozzle touch is received by the bolts connecting the beds, and the bending of both bed side walls due to the tensile force is prevented by the reinforcing steel plate. Even in the case where the reaction force of the nozzle touch is concentrated above the joint portion due to the height of the nozzle touch position and a bending stress occurs above the bed, the bending stress is generated by the connecting steel plate bolted over the upper surfaces of both beds. And deformation of the bed above the binding site is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawing, reference numeral 1 denotes an injection device which is mounted on a central portion of a turntable 3 provided on an upper surface of a bed 2 having a box-shaped structure. On three sides of the injection side bed 2,
First to third mold clamping devices 4, 5, and 6 radially located along the circumference of the turntable 3 are arranged so that the beds 7, 8, and 9 having the respective frame structures can be brought into contact with the heel of the bed so as to contact the heel. The two side surfaces are integrally connected to each other.

The injection side bed 2 and the mold clamping side beds 7,
8 and 9, two reinforcing steel plates 10 each having a bolt hole and a pin hole are vertically interposed between the side walls, as shown in FIGS. The bed side walls 11 and 12 are integrally connected by tightening a bolt 13 inserted from the injection side bed 2 and a nut 14 screwed from the opposite side. The upper and lower and left and right positioning of the beds at the time of this connection are performed by positioning a pin 15 protruding from the bed side wall 11 of the injection side bed 2 and a positioning hole formed on the opposite side wall 12 through a pin hole of the reinforcing steel plate 10. 15a.

Further, the beds are connected to each other by fastening bolts to connecting steel plates 18 to seat plates 16 and 17 fixed to the upper surfaces of both connecting ends by welding. This connected steel plate 1
8 are provided with bolt holes at the corners and pin holes at the plate surface between the bolt holes.

The fastening of the connecting steel plate 18 by the bolts 20 is performed after the bed side walls 11 and 12 are connected by the bolts 13 and the nuts 14. For fastening, the connecting steel plate 18 is first laid over the seat plates 16 and 17, and then the pins 19 are inserted into the receiving holes of the seat plate from above the connecting steel plate 18 to perform positioning. 2
0 is screwed into the screw holes of the seat plates 16 and 17.

In the bed by the above connection, since the reinforcing steel plate 10 and the connecting steel plate 18 are located in a T-shape at the connection end of the beds, the injection device 1 moves forward and the mold of the mold clamping device 4 and the nozzle When the user touches and the reaction force acts as a tensile force of the injection bed 2, and the tensile stress concentrates on a joint portion with the bed 7, the tensile force is reduced by the bolt 1.
3 and nut 14, and the bending of both bed side walls 11, 12 due to the tensile force is reduced by the reinforcing steel plate 1.
0 prevents it.

Further, the reaction force of the nozzle touch is concentrated above the joint portion from the height of the nozzle touch position, and the bolt 13
Even when bending stress occurs in the bed above,
Since the connecting steel plate 18 extending over the upper surface of the connecting end of the two beds acts as a resistance, deformation of the bed above the bolt 13 is prevented, and the nozzle touch position caused by the deformation of the bed hardly occurs. .

Further, since the beds are all connected by bolts, the bed can be easily assembled and disassembled and positioned at the time of installation. The same strength as that of one bed can be secured, and in some cases, the weight of the mold-side bed can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a rotary injection molding machine provided with a bed according to the present invention.

FIG. 2 is a plan view in which a part of the bed according to the present invention is cut away.

FIG. 3 is a side view of the same.

FIG. 4 is a longitudinal sectional view of a coupling portion.

FIG. 5 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection apparatus 2 Injection side bed 3 Turntable 4,5,6 First to third mold clamping device 7,8,9 Mold clamping side bed 10 Reinforcement steel plate 11,12 Bed side wall 13 Bolt 14 Nut 15 Positioning pin 16, 17 Seat plate 18 Connecting steel plate 19 Pin 20 Bolt

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[Procedure amendment]

[Submission date] January 7, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

When an injection molding machine becomes large, a bed is divided into an injection side and a mold clamping side due to circumstances such as transportation, so that the bed can be disassembled and assembled so as to be integrated at the time of installation after transportation. However, in a rotary injection molding machine in which an injection device is mounted on a turntable provided on the upper surface of a bed and a plurality of mold clamping devices are radially arranged along the circumference of the turntable. The bed is manufactured separately for each of the injection device and each mold clamping device, and is integrated at the time of installation, since the transportability is inferior if an integrated bed is used due to the large number of constituent devices.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiaki Kudo Nagano Prefecture, Hanishina-gun, Sakajo-cho, 2110 Nanjo, Nissei Plastics Co., Ltd. Seisin Kogyo Co., Ltd.

Claims (1)

[Claims] 1. An injection device is mounted on a turntable provided on an upper surface of a bed, and the injection device is moved along a circumference of the turntable.
In a revolving injection molding machine in which the mold clamping devices of the table are radially arranged together with the bed, and the injection device is configured to be able to cope with each of the mold clamping devices by pivoting movement, the distance between the side wall between the injection side bed and the mold clamping side bed is increased. A steel plate is interposed between the beds, and the beds are joined together with the reinforcing steel plates by bolts, while the connecting steel plates are hung over the upper joint ends of the beds, and the connected steel plates are fastened to the upper surfaces of the beds by bolts. A bed of a rotary injection molding machine provided with three mold clamping devices.