JP3748478B2 - Swivel injection molding machine bed with 3 mold clamping devices - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bed of a molding machine in which one injection device is swung with respect to three mold clamping devices to enable injection of a material resin for each mold clamping device.
[0002]
[Problems to be solved by the invention]
When the injection molding machine becomes large, the bed is divided into an injection side and a mold clamping side for reasons of transportation, etc., so that it can be disassembled and assembled so that it can be integrated during installation after transportation. Even in a swivel injection molding machine in which an injection device is mounted on the turntable provided on the upper surface and a plurality of mold clamping devices are arranged radially along the circumference of the turntable, the number of components is large, so it is an integrated type. Since the transferability of the bed is inferior, the bed is manufactured separately for each of the injection device and each mold clamping device, and is integrated at the time of installation.
[0003]
Bolts are used for the mutual coupling of the beds so that assembly and disassembly is easy, but the reaction force of the nozzle touch tends to concentrate on the coupling site with the mold clamping side bed as the tensile force of the injection side bed. There is also a problem that the bed above the portion where the beds are bolted to each other by the repeated nozzle touch is likely to be deformed.
[0004]
The present invention has been conceived to solve the above-mentioned problems. The purpose of the present invention is to use a combination of a bolt and a connecting steel plate to make the bed mutually strong and to react with the nozzle touch. It is an object of the present invention to provide a bed for a new swivel type injection molding machine capable of preventing the deformation of the connecting portion above the bed due to the above.
[0005]
[Means for Solving the Problems]
According to the present invention, the injection device is mounted on a turntable provided on the upper surface of the bed, and three mold clamping devices are arranged radially with the bed along the circumference of the turntable, and the injection device is swung. In a swivel type injection molding machine configured to be compatible with each mold clamping device by movement, a reinforcing steel plate is interposed between the side walls of the injection side bed and the mold clamping side bed, and the beds are joined together by bolts together with the reinforcing steel plate On the other hand, a connecting steel plate is stretched over the upper surface of the coupling ends of the beds, and the connecting steel plate is fixed to the upper surface of the bed with bolts.
[0006]
In such a bed, the tensile force generated at the connecting portion of the bed caused by the nozzle touch is received by the bolts connecting the beds, and the deflection of both bed side walls due to the tensile force is prevented by the reinforcing steel plate. Also, even when the reaction force of the nozzle touch is concentrated above the connecting part due to the height of the nozzle touch position and bending stress is generated above the bed, the bending stress is applied by the connecting steel plate bolted over the upper surfaces of both beds. And the deformation of the bed above the binding site is prevented.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the figure, reference numeral 1 denotes an injection device, which is mounted at the center of a turntable 3 provided on the upper surface of a box-shaped bed 2. On the three sides of the injection side bed 2, first to third mold clamping devices 4, 5, 6, which are located radially along the circumference of the turntable 3, are provided with the respective bed 7, 8 and 9 are integrally connected to the side surface of the injection side bed 2 so as to contact the heel.
[0008]
As shown in detail in FIGS. 4 and 5, the injection-side bed 2 and the mold-clamping-side beds 7, 8, 9 have two reinforcing steel plates 10 each having a bolt hole and a pin hole, and are vertically disposed between the side walls. The bed side walls 11 and 12 together with the reinforcing steel plate 10 are fastened together by bolts 13 inserted from the injection side bed 2 and nuts 14 screwed from the opposite side, and are integrally coupled. . The vertical and lateral positioning of the beds at the time of the coupling is performed by positioning the pin 15 projecting on the bed side wall 11 of the injection side bed 2 and the positioning hole formed on the opposite bed side wall 12 through the pin hole of the reinforcing steel plate 10. This is performed by fitting with 15a.
[0009]
Further, the beds are connected to the seat plates 16 and 17 fixed to the upper surfaces of both coupling ends by welding with a connecting steel plate 18 secured with bolts. Bolt holes are formed in each corner of the connecting steel plate 18, and pin holes are formed in the plate surfaces between the bolt holes.
[0010]
Such fastening of the connecting steel plates 18 with the bolts 20 is performed after the bed side walls 11 and 12 are coupled with the bolts 13 and the nuts 14. First, the connecting steel plate 18 is stretched over the seat plates 16, 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, and then the bolts from above the connecting steel plate 18. 20 is screwed into the screw holes of the seat plates 16 and 17.
[0011]
In the bed by the above combination, the reinforcing steel plate 10 and the connecting steel plate 18 are positioned in a T shape at the joint ends of the beds, so that the injection device 1 moves forward and nozzle-touches the mold of the mold clamping device 4, Even if the reaction force acts as a tensile force of the injection bed 2 and a tensile stress is concentrated on the joint portion with the bed 7, the tensile force is received by the bolt 13 and the nut 14, and the tensile force. The bending of both the bed side walls 11 and 12 due to is prevented by the reinforcing steel plate 10.
[0012]
Further, even when the reaction force of the nozzle touch is concentrated above the coupling portion due to the height of the nozzle touch position and bending stress is generated in the bed above the bolt 13, the connecting steel plate 18 over the upper surfaces of the coupling ends of both beds. Acts as a resistance force, so that the deformation of the bed above the bolt 13 is prevented, and the nozzle touch position is not easily misaligned due to the deformation of the bed.
[0013]
In addition, since the beds are all connected by bolts, positioning during bed assembly / disassembly and installation can be performed easily, and even with a swivel injection molding machine that requires division due to the difference in bed layout direction, a single bed is used. The same strength as the case can be secured, and in some cases, the weight of the mold clamping side bed can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a swivel type injection molding machine provided with a bed according to the present invention.
FIG. 2 is a plan view of a part of the bed according to the present invention 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 above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Injection apparatus 2 Injection side bed 3 Turntable 4,5,6 1st-3rd mold clamping apparatus 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

Claims (1)

An injection device is mounted on a turntable provided on the upper surface of the bed, and three mold clamping devices are arranged radially together with the bed along the circumference of the turntable. In the swivel type injection molding machine configured to be compatible,
A reinforcing steel plate is interposed between the side walls of the injection-side bed and the mold-clamping bed, and the beds are joined together by bolts together with the reinforcing steel plate. A bed of a swivel type injection molding machine provided with three mold clamping devices, characterized in that the bolt is fastened to the upper surface of the bed with bolts.

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