Molding machine
AssigneesKyoraku Co., Ltd., Sika Machinery Co., Ltd.
InventorTzu Chiang Chang
Life of this patent
Estimating the term…
Abstract
A molding machine configured to achieve space saving and simplification of the hydraulic circuit. Provided is a molding machine configured to form a molded body by closing, in a state where a parison is disposed by injecting molten resin between first and second molds capable of being opened and closed, the first and second molds and maintaining pressure applied to the first and second molds. A hydraulic circuit to conduct oil for generating hydraulic pressure; the flow adjustment valve, a pressure adjustment valve, and a path control valve included in the hydraulic circuit; and a multi-functional valve unit.
Claims13
A molding machine configured to form a molded body by closing first and second molds in a state where a parison is disposed by injecting molten resin between the first and second molds capable of being opened and closed, and then maintaining pressure applied to the first and second molds, comprising:
- a hydraulic circuit to conduct oil for generating hydraulic pressure;
- a flow adjustment valve, a pressure adjustment valve, and a path control valve included in the hydraulic circuit;
- and
- a multi-functional valve unit,
- wherein at least hydraulic mechanisms injecting the molten resin, opening and closing the molds, and maintaining the pressure applied to the first and second molds are driven by the hydraulic pressure generated by the oil sucked out and conducted to a downstream side from a tank storing the oil using a same pump;
- the flow adjustment valve adjusts a flow rate of the oil;
- the pressure adjustment valve adjusts the hydraulic pressure;
- the path control valve determines a conduction path of the oil in the hydraulic circuit;
- and
- the multi-functional valve unit integrally comprises the flow adjustment valve, the pressure adjustment valve, and the path control valve.
A molding machine comprising:
- a hydraulic circuit;
- a hydraulic mechanism for injection;
- a hydraulic mechanism for opening and closing;
- an injection part;
- and first and second platens on which first and second molds are mounted,
- wherein the hydraulic circuit conducts oil for generating hydraulic pressure;
- the hydraulic mechanism for injection and the hydraulic mechanism for opening and closing are driven by hydraulic pressure;
- the injection part is driven by the hydraulic mechanism for injection to inject molten resin between the first and second molds to form a parison;
- the first and second platens are configured to be driven by the hydraulic mechanism for opening and closing and open and close the first and second molds;
- the hydraulic circuit comprises a first accumulator for accumulating oil;
- the hydraulic mechanism for injection and the hydraulic mechanism for opening and closing are sequentially driven by hydraulic pressure generated by the oil discharged from the first accumulator;
- and
- the hydraulic circuit is configured to stop supplying the oil to the hydraulic mechanism for opening and closing from the first accumulator when the hydraulic mechanism for injection is driven by the hydraulic pressure and to stop supplying the oil to the hydraulic mechanism for injection from the first accumulator when the hydraulic mechanism for opening and closing is driven by the hydraulic pressure.
Dependencies are inferred from the claim text.