Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Patent
1988-03-04
1989-11-14
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
425148, 425253, 425254, 425452, 425DIG118, B29C 4517
Patent
active
048803723
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a feeding system which is provided with a plurality of injection molding machines for carrying out a molding operation of plastics and which is for feeding these molding machines with plastics as a raw material.
BACKGROUND TECHNIQUE
Heretofore, a feeding system has been known which is provided with a plurality of injection molding machines and which is for feeding these injection molding machines with a resin material in a batch-type fashion or a continuous fasion.
The following methods (1) through (3) has been heretofore used to feed the resin material to a plurality of the injection molding machines.
(1) An operator manually throws in a resin material from a sack of resin into a hopper at every injection molding machine.
(2) An autoloader or a resin material feeding device is attached to each injection molding machine and feeds a resin material to the injection molding machine. In this case, each of the autoloaders is fed with the resin material by an operator. Thus, the resin material is delivered into each hopper through each autoloader.
(3) A hopper of each injection molding machine is connected to a resin tank by a pipe through which a resin material is transported from the resin tank. In this event, the amount of resin transported from the resin tan is controlled by monitoring an amount of the resin material in the hopper.
However, in the above-mentioned method (1), the operator must manually feed the resin material into the hopper. Furthermore, the operator must continuously monitor the amount of the resin material in the hopper to replenish the resin material therein.
In the method (2), the resin material in the hopper is monitored by the autoloader. However, there remains a problem that the operator must manually feed the resin material to the autoloader.
On the other hand, in the method (3), the resin material is automatically fed from the resin tank to the injection molding machines. Accordingly, the operator can save a lot of labor. However, if there are a large number of injection molding machines and, furthermore, if there are many kinds of resin materials, an extremely large number of pipes must be arranged. This makes it difficult to install the system in a factory.
Accordingly, it is an object of the present invention to provide a material feeding system which is capable of automatically feeding a resin material to injection molding machines and which can readily be installed in a factory.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided a plurality of injection molding machines and a resin filling station. The resin filling station comprises a resin tank in which a resin material is stored, a container which is fed with the resin material from the resin tank, and coupling means for coupling the resin tank and the container on demand. In addition, a track is laid so as to pass over the above-mentioned filling station and the injection molding machines. A carrier having a clamping mechanism runs along the track. The carrier and the coupling means are controlled by a control unit. In other words, the movement of the carrier and coupling operation by the coupling means are controlled in accordance with commands from the control unit. According to the commands from the control unit, the carrier transports the container by the use of the clamping mechanism to feed the resin material from the container to the injection molding machines.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a plan view diagrammatically illustrative of an embodiment of a material automatic feeding system according to the present invention;
FIG. 2 is an elevational view illustrative of a filling station and a carrier in detail;
FIG. 3 is a sectional view illustrative of a structure of a container;
FIG. 4 is a partial sectional view of a clamping mechanism of the carrier in combination with the container;
FIG. 5 is a view illustrative of another embodiment of the filling station; and
FIG. 6 is a view illustrative of another embodiment
REFERENCES:
patent: 4363585 (1982-12-01), Keller et al.
Heitbrink Timothy W.
Sumitomo Heavy Industrie's, Ltd.
Woo Jay H.
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