JPH073897U - Hydraulic press guide - Google Patents

Abstract

(57) [Abstract] [Purpose] The guide of the slide of the hydraulic press or injection molding machine is used as a guide that guides only during molding, the frame structure is simplified, and the structure does not interfere with the mold during mold replacement. [Construction] Inside the bed (1), there are vertically arranged cylinders (3) corresponding to the four corners of the slide (2), and guide posts extending above and below the piston (5) adapted to the cylinder (3). (4) and the rod (7) are provided, and the tapered pin portion (6) is provided at the upper end of the guide post (4).
A taper block (9) having a corresponding tapered hole is provided on the lower surface of the slide (2), an upper limit stopper (8) capable of adjusting the vertical position is provided at the lower end of the rod (7), and the lower side of the piston (5) is provided. The guide post (4) is urged upward by supplying a constant pressure oil to the guide post (4), and the taper block (9) is fitted to the guide post (4) before the upper and lower molds come into contact with each other when the slide (2) descends. When the mold is replaced, the pressure oil is switched and supplied to the upper side of the piston (5) so that the guide post (4) is drawn into the bed (1).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a guide of a hydraulic press, and can be used as a guide of a slide of a hydraulic press and a guide of a movable platen of an injection molding machine having a hydraulic cylinder.

[0002]

[Prior art]

 In the United States, slides of hydraulic presses and movable platens of injection molding machines were guided by the guides provided on the frame over the entire length of the movable range, in other words, regardless of whether or not processing was in progress.

[0003]

[Problems to be solved by the device]

 The above-mentioned US guide exists over the entire length of the slide and platen lift, and there is a problem when a large space is required in the vertical direction when changing the mold. In order to solve this problem, the purpose of the present invention is to provide a structural dimension that guides the slide and the movable platen with the required rigidity only during the press working, so that the die and the guide member can be replaced when the die is replaced. Is to provide a guide for the hydraulic press that does not interfere.

[0004]

[Means for Solving the Problems]

 The structure of the present invention for achieving the above-mentioned object is to guide a slide or a movable platen (hereinafter simply referred to as "slide") by a hydraulic cylinder part of a hydraulic press except during press working, and to provide the slide on the slide just before starting the press working. A short tapered taper block is fitted into a guide post that can be raised and lowered by a cylinder with a bed inside, and it is a separate guide that is guided by the guide post during repressing. The post is designed so that it can be pulled into the bed by shilling the bed interior.

[0005]

[Action]

 The taper block is fitted to the guide post, and the guide post guides the slide before the upper and lower molds fixed to the slide and the bed contact each other. By adjusting the upward biasing force of the guide post, the impact when the upper and lower molds come into contact with each other is mitigated, and sufficient rigidity can be obtained as a slide guide during molding. Also, when the mold is replaced, the guide post is pulled into the bed, and the taper block rises along with the slide, so there is nothing that interferes with the mold and the operation is easy.

[0006]

【Example】

 1 and 2 show an embodiment of the present invention. The bed (1) of the hydraulic press is provided with vertically oriented cylinders (3) at positions corresponding to the four corners of the slide (2), and the bed (1) penetrates the cylinder (3) upward in an oil-tight manner. A piston (5) is fixedly mounted on the lower end of the guide post (4), and is slidably fitted in the cylinder (3) in an oil-tight manner. At the upper end of the guide post (4), there is concentrically provided a tapered pin portion (6) having a smaller diameter than the outer diameter of the guide post (4) and having a trapezoidal vertical cross section. The lower end of the rod (7), which is provided by penetrating the bed (1) below the piston (5) in an oil-tight manner, has an upper and lower position adjustable upper limit in order to regulate the rising limit of the guide post (4). A stopper (8) is provided. The bed (1) may be a bolster or, in the case of an injection molding machine, a fixed platen. The lower surface of the slide (2) is provided with a downward taper block (9) corresponding to the guide post (4) and having a hole adapted to the taper pin portion (6) of the guide post (4). The slide (2) is connected to a piston rod of a downward hydraulic cylinder (not shown), moves up and down by a required stroke, and is pressed downward. At this time, the slide (2) is guided up and down and stopped by the hydraulic cylinder. A positional error due to a slight clearance is absorbed by the tapered pin portion (6) of the guide post (4) and the tapered hole of the tapered block (9), and positioning and fitting are performed. The cylinder (3) installed in the bed (1) connects the lower end and the upper end to each other through the oil passage (10) and the oil passage (11), and the opening (A) of the oil passage (10) and the oil passage (1). As shown in FIG. 2, the opening (B) of 1) is connected to the ports (A) and (B) of the 3-position electromagnetic switching valve (12) by the pipes (13) and (14), respectively. The pipe (13) on the port (A) side is branched and a relief valve (15) is provided so that the pressure inside the pipe (13) can be adjusted to a desired pressure. A hydraulic pressure source (16) is connected to the port (P) corresponding to the port (A) of the electromagnetic switching valve (12), and an oil tank (17) is provided on the oil discharge side of the relief valve (15). The position of the upper limit stopper (8) is adjusted according to the total height of the mold (not shown). Before the upper and lower molds come into contact with each other, the electromagnetic switching valve (12) is energized to the a side, and pressure oil is supplied to the lower side of the piston (5) of the cylinder (3) through the pipe (13) to supply the relief valve (15). Adjust the required pressure with). This state is shown on the left side of the center line in FIG. 1, and the guide post (4) projects to the required height. Before the slide (2) is pressed down and the die comes into contact, the taper block (9) is fitted to the taper pin portion (6) of the guide post (4), and the guide post (4) is pushed down while pressing the metal. The mold contacts. The abutment of the mold is buffered by the damper effect of the guide post (4). The pressure oil in the cylinder (3) escapes to the oil tank (17) while maintaining a constant pressure via the relief valve (15), and becomes the state on the right side of the center line in FIG. During this time, the guide post (4) and the taper block (9) are hydraulically brought into close contact with each other and descend, so that the slide (2) is guided by the guide post (4) with sufficient rigidity. When the slide (2) rises, pressure oil is replenished from the hydraulic pressure source (16) to the lower side of the piston (5) of the cylinder (3), and the state returns to the left side of the center line in FIG. When the mold is replaced, the electromagnetic switching valve (12) is switched to the b-side excitation to supply oil to the pipe (14), drain the pipe (13), and draw the guide post (4) into the bed (1).

[0007]

[Effect of device]

 As is clear from the above description, according to the present invention, (1) since the slide is guided by the guide post only during molding, the frame structure of the hydraulic press can be simplified. Also, since the guide post can be shortened, the required rigidity can be obtained with a relatively thin guide post. (2) Since the guide post is retracted into the bed and the mold is replaced, there is nothing that interferes with the mold on the bed, and the operation is easy. (3) Since the upper limit stopper is provided on the guide post, the slide can be guided by the length required for molding the mold. Therefore, the effect of minimizing the consumption of pressure oil can be obtained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the present invention,

FIG. 2 is a hydraulic circuit diagram necessary for FIG.

[Explanation of symbols]

1 is a bed, 2 is a slide, 3 is a cylinder, 4 is a guide post, 5 is a piston, 6 is a tapered pin portion, 7 is a rod, 8 is an upper limit stopper, 9 is a tapered block, 10 and 1.
1 is an oil passage, 12 is an electromagnetic switching valve, 13 and 14 are pipes, 15
Is a relief valve, 16 is a hydraulic source
Is.

Claims (1)

[Scope of utility model registration request] 1. A guide for a hydraulic press or a hydraulic press for guiding slides of an injection molding machine, wherein a required number of vertical cylinders (3) are installed in a bed (1) and a piston (5) adapted to the cylinder (3). ) Is fixed upward, penetrates through the bed (1), is biased upward, and has a guide post (4) having a tapered pin portion (6) with a vertical cross-section trapezoidal shape at its upper end, and a slide (2). ) A hydraulic pressure characterized by comprising a taper block (9) provided on the lower surface corresponding to the guide post (4) and having a tapered hole to be fitted with the tapered pin portion (6) of the guide post (4). Press guide.