Manual hydraulic quick mold change device

Abstract

A manual hydraulic quick mold changing device includes a mold base body with a circular recess containing several locking sliders. A number of quick-connect coupling holes extend from the top surface into the circular recess. An actuating piston abuts against the inclined surface of the locking slider with a conical surface. A pressure accumulator is formed between the actuating piston and the bottom cover. An operating handle on the side of the mold base body drives a pump piston. The mold base body has a pump chamber for the pump piston to operate. A check valve is provided between the pump chamber and a liquid storage tank, and another check valve is provided between the pump chamber and the pressure accumulator. The other side of the pressure accumulator is connected to the liquid storage tank via a drain pipe, with a pressure relief valve provided therebetween. The quick-connect couplings are inserted into the coupling holes. Rotating the operating handle causes the pump piston to press the liquid in the pump chamber into the pressure accumulator, pushing the actuating piston upwards, causing the locking slider to engage with the quick-connect coupling annular groove, achieving rapid hydraulic positioning.

Claims

1. A manual hydraulic quick mold changing device, comprising: A mold base body has a circular recessed chamber extending upwards from its bottom surface. Several quick-connect coupling holes on the top surface of the mold base body pass through this circular recessed chamber. Several guide grooves on the circular recessed chamber connect from the center to the quick-connect coupling holes. Several locking sliders slide in the guide grooves. A central screw fixes one end of several springs, and the other ends of several springs are respectively fixed to several locking sliders. Several elastic elements are assembled in several grooves within the circular recessed chamber. An actuating piston is assembled into the circular recessed chamber and is abutted by the free ends of the elastic elements. The actuating piston abuts against an inclined surface of each locking slider with a conical surface. A bottom cover is installed at the opening of the circular recess, forming a pressure accumulator between the actuating piston and the bottom cover. An inlet pipe and a drain pipe are provided on the side of the mold base body to the pressure accumulator. A storage tank is provided at the point through which the drain pipe passes. The inlet of the inlet pipe is connected to a pump chamber. A guide pipe is provided from the storage tank to the pump chamber. A first check valve is provided on the guide pipe. An operating handle is pivotally mounted at its front end to the side of the mold base body. A pump piston is pivotally mounted near the front end of the operating handle. The pump piston assembly is actuated in the pump chamber. A pressure relief valve passes directly through the storage tank and is sealed to the drain pipe. A second check valve is provided on the inlet pipe.

2. The manual hydraulic quick mold changing device as described in claim 1, wherein the drain pipe is provided with an outlet at the location where it connects to the storage tank, and the front end of the pressure relief valve is provided as a conical column, which can be sealed at the outlet.

3. The manual hydraulic quick mold changing device as described in claim 1, wherein the drain pipe is provided with an outlet at the connection point to the liquid storage tank, and the front end of the pressure relief valve is provided with a cylindrical body and an O-ring sleeved thereon, the cylindrical body with the O-ring sleeved thereon extending into the interior of the outlet to seal the drain pipe.

4. The manual hydraulic quick mold changing device as described in claim 2 or 3, wherein the liquid storage tank is provided with a liquid replenishment port on the side of the mold base body, and the liquid replenishment port is sealed with a plug.

5. The manual hydraulic quick-change mold device as described in claim 4, wherein a number of quick-connect couplings for connecting to the quick-connect coupling assembly holes are fixed to the bottom surface of a vise.

6. The manual hydraulic quick mold changing device as described in claim 5, wherein the top surface of the mold base body is provided with several through holes from the bottom surface, and a bolt is inserted through each of the through holes.

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