JPH0222093Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mold lift device for a press that lifts the mold from a bolster when replacing the mold.

In conventional presses that use fixed bolsters, after press work is completed, the mold on the bolster is manually pushed forward or backward, placed on a forklift truck or trolley, and transported out of the press. .

However, this work involved handling heavy molds, which was not only dangerous, but also placed a heavy burden on the workers.

This invention was made with the aim of improving this problem, and the mold on the bolster is pushed up to create a gap between the bolster and the mold in which the fork of the forklift truck can be inserted. The present invention provides a mold lift device for a press that enables easy and efficient loading and unloading of molds.

This invention will be described in detail below with reference to one embodiment shown in the drawings. In the figure, 1 is a press bed, and a bolster 2 is installed on this bed 1. A mold 3 consisting of an upper mold 3a and a lower mold 3b is placed on the bolster 2 and positioned by a positioning pin 4 protruding from the bolster 2. A lift device 5 is provided on the opposite side. The lift device 5 includes a cylinder 5a formed in the bolster 2, and a piston 5b housed in the cylinder 5a so as to be slidable in the vertical direction. 2
The cylinder 5a is raised by hydraulic pressure supplied to the bottom side of the cylinder 5a through the cylinder 5a. Further, a piston rod 5c is provided protruding from the upper surface of the piston 5b. The distal end of the piston rod 5c passes through a presser plate 7 fixed to the bolster 2 by a fixing member 6 and protrudes upwardly and retractably from the presser plate 7 so as to close the upper opening of the cylinder 5a.

This idea has been explained in detail above, so when the mold 3 is to be carried out from above the bolster 2 after the press work is completed, hydraulic pressure is supplied from the oil passage 2a to the bottom side of the cylinder 5a to raise the piston 5b. often,
The tip of the piston rod 5c that protrudes from the piston 5b protrudes from the upper surface of the bolster 2, and lifts one end side of the mold 3 (adapter plate if there is an adapter plate) on the bolster 2 as shown in FIG. Since a gap 9 into which a fork 8 of a forklift truck can be inserted is formed between the mold 3 and the bottom surface of the mold 3, the mold 3 on the bolster 2 can be easily carried out by a forklift truck or the like.

Also, when transporting the mold 3, place the positioning pin 4
With the mold 3 positioned in the position shown in FIG.
Since it is only necessary to lower b and place the mold 3 on the bolster 2, the mold 3 can be carried in and out of the bolster 2 safely without any manual effort, and the positioning pin 4 allows the mold 3 to be placed on the bolster 2. Since positioning is performed in step 3, there is no need to move and position the mold after placing the mold, and the mold can be positioned accurately in a short time.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, with FIG. 1 being a side view and FIG. 2 being an enlarged sectional view within the circle in FIG. 1. 2 is a bolster, 3 is a mold, 5a is a cylinder, 5
b is the piston, and 5c is the piston rod.

Claims (1)

[Scope of utility model registration request] A cylinder 5a is provided inside one end side of the bolster 2 provided in the press, and a piston 5b that is movable up and down by hydraulic pressure supplied to the bottom side of the cylinder 5a is provided in the cylinder 5a.
A piston rod 5c protrudes freely from b to the upper surface of the bolster 2, and the mold 3 on the bolster 2 can be moved up and down with the tip of the piston rod 5c.
A press mold lift device comprising a positioning pin 4 protruding from the other end of the bolster 2 for positioning the mold 3.