JPS5920988Y2 - Mold opening/closing device in press machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for easily separating the two halves of a lower die in a press machine for molding synthetic resins or other press machines.

In conventional press machines, one of the upper and lower dies is fixed to the press frame, and the other is raised and lowered by a ram to perform the required compression process to form field soil made of synthetic resin or the like.

However, when filling the mold with raw materials or taking out the molded product, either the lower mold is removed from the press, or
As shown in Publication No. 32272, after the entire mold is pulled out from the press body, the upper and lower molds are separated into two parts and the molded product is removed. It requires a separation process, which is time-consuming, and in the case of large molds, it is very difficult to take out and separate the lower mold.

The present invention was developed in view of this.

In the figure, 1 is the main machine frame of the press machine, and this main machine frame 1
Supports 2, 2 are established on the upper side of the roof, and a fixed heating plate 3 is fixed to the upper end of the support 2.

Further, a lower heating plate 4 is provided on the main machine frame 1 opposite to the fixed heating plate 3 so as to be movable up and down by a ram 5 driven by hydraulic pressure or the like.

Further, guide plates 6, 6, which are longer than the stroke from the lowermost position to the highest position of the lower die, are integrally provided on the inner surfaces of the columns 2, 2, and only the upper end thereof is perpendicular to the guide plate 6. A guide groove 6a whose portion is inclined downward from the front of the press.
, 6b are bored in parallel.

The horizontal length from the upper end to the lower end of these guide grooves 6a, 6b is such that when the upper and lower molds are separated, the lower mold comes out to the front to the extent that it is easy to work (sliding range),
This is determined in advance based on the size of the press, workability, etc.

A roller 8 that is movably supported on the side surface of a slide plate 17 that is slidably placed on the lower die mounting plate 7 is fitted into this gun guide groove 6a, and a roller 8 that is movably supported is fitted into the other guide groove 6b. The roller 10 provided on the rear end side of the mold mounting board 9 is fitted, and the front part, that is, the front lower surface of the upper mold mounting board 9 is attached to the upper part of the main machine frame or the side surface of the upper heating plate 3 via the bracket B. It is supported on provided rollers 11.

Further, a connecting plate 12 having an elongated hole 12a in the vertical direction is fixed to the upper rear end of the slide plate 17 on the lower die mounting plate 7, and a guide groove 6b is fitted into the elongated hole 12a. At the same time, the rollers 10 are fitted together.

Then, the desired molds Kl and 2. Figures 2 and 3 show the state in which the lower mold is lowered by lowering the ram 5 to open the upper and lower molds.

In this case, the slide plate 17 on the lower mold mounting plate 7 is slid on the lower mold mounting plate by the rollers 8 fitted to the lower end of the guide groove 6a and pushed out to the front of the press machine, and When the lower die mounting plate is lowered, the rear end of the upper and lower die mounting plates is pulled down through the rollers 10 fitted into the long holes of the connecting plate, and the front end is supported by the rollers 11, so it is tilted and the distance between the upper and lower molds is lowered. It will be in an open state.

The slide plate on the lower mold mounting board 7 is provided with lower molds 13a and 13b which are divided into upper and lower halves as shown in FIGS. The upper lower mold 13b is fixed in position and is provided on the lower lower mold 13a so as to be detachable and movable up and down.

This separation of the rain molds 13a and 13b, that is, the lower mold 13a
As shown in detail in FIGS. 3 and 4, the cylinder 14 is installed in front of the ram 5 and vertically above the lower mold mounting plate 7.

In other words, bolts or rods 18.18 installed vertically on the lower die mounting board.
A bracket 14a is provided at the bracket 14a, and the cylinder 14 is fixed to this bracket 14a.
A lifting platform 15 is provided so as to pass through the opening 8 and to be freely raised and lowered using a bolt or rod as a guide.

The lifting table 15 is fixed to the tip of the rod of the cylinder 14, and the lifting table 15 is raised and lowered by operating the cylinder 14, and is sized so that it slightly protrudes from both sides of the lower die mounting board. Lower mold support plates 16.1 are arranged on both sides of this lifting platform 15 so as to sandwich the lower mold mounting plate 7, and also facing each other.
6 is installed protrudingly.

The height of this lower die support plate 16 is the position where the rod of the cylinder is at its lowest position, and the upper lower die 13b supported by the lower die support plate 16.16 is accurately positioned above the lower lower die 13a. so that it can be layered on top of the other.

Also, a notch hole 16 a is provided at least on the upper surface of the back side of the lower die support plate 16 (in the illustration, the front side and the back side).
An engaging piece 13 protruding from the side of the upper lower mold 13b inside 6a
C is fitted, and the rain type 13a,
13b is operated by the Shinonda 14 to raise the upper side lower mold 13b parallel to the lower side lower mold 13a, and both molds 13a,
13b is separated, and when the front side of the upper lower mold 13b is further pushed up by hand, the upper lower mold 13b is swung using the engagement piece fitted in the notch hole opened at the top as a fulcrum. It opens and closes like a hinge.

In addition, when swinging this upper side lower mold 13b, the Shinonda 1
4 to raise the lifting table, and the lower mold support plate 16 protruding from the lifting table pushes up the upper lower mold horizontally than the lower mold, so that the lower mold 13a and 13b are spaced between the upper and lower molds 13a and 13b. This is done with a horizontal gap created.

When forming a molded product using the press machine configured as described above, first, as shown in FIG. 2, the upper and lower molds are opened, and the lower molds 13a on both the upper and lower sides are opened.

After setting 13b into the desired shape, a required amount of raw material is supplied into this lower mold.

After this, when the ram is raised, the slide plate 17 on the lower die mounting plate moves along the slope of the guide groove 6a by the guide groove and the rollers fitted into the guide groove. While rising together with the mounting plate, it retreats into the space between the supports of the press machine, and as it does so, the elongated holes of the connecting plate 12 and the guide groove 6
By means of the rollers 10 fitted in b, only the rear end of the upper mold mounting plate is raised together with the lower mold, and its inclination angle is gradually reduced.

When the rollers 8°10 come to the vertical parts of the guide grooves 6a and 6b, the upper and lower mounting plates 7 and 9 become parallel, and the long hole 1 of the connecting plate
Only the length of 2a and the length of the vertical portion of each guide groove have a gap.

When the ram is further driven in this state, the upper mold mounting plate hits the fixed heating plate and stops rising, but the lower mold continues to rise further, reducing the gap between the upper and lower molds and maintaining a constant pressure, that is, a preset pressure. When the ram is lowered after pressing the upper and lower dies for a certain period of time, the upper and lower dies are separated from each other, as shown in Figures 2 and 3, contrary to when the ram is raised. Thus, the lower die slides and protrudes toward the front of the press machine, while the upper die is tilted so that the front face is upward, opening between the upper and lower dies, making it easier to take out the molded product inside the lower die.

Next, cylinder 1 is always fixed in a position in front of the ram.
When the lifting platform is raised by step 4, the upper lower mold is horizontally lifted upward by the lower mold support plate protruding from the side of the lifting table, and the upper and lower lower molds are completely separated or spaced apart.
Further, when the front side of the upper lower die is lifted upward, it swings around the engagement piece as a fulcrum and opens wide like a crocodile.

In this state, the molded product inside the lower mold is taken out and cleaned.

In the case of large molds, this upper lower mold may be oscillated by a cylinder.

According to the present invention, the lower mold is divided into upper and lower parts, and the upper lower mold is positioned in front of the ram than the lower lower mold and is movable up and down while being held horizontally by a cylinder provided on the lower mold mounting board. In addition, an engaging piece protruding from the side surface of the lower mold on the lower side is supported in a cutout hole formed on the top surface of the support plate, and the lower mold swings using this engaging piece as a fulcrum so that its front side opens like a crocodile. Since it is freely movable, the front part between the rain molds is wide open, which has the advantage of making it easy to remove and clean the molded product inside the lower mold.

[Brief explanation of drawings]

FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a side view of essential parts showing the open/closed state of the lower mold, and FIG. 4 is a sectional view of FIG. 3. 1... Main machine frame of the press machine, 2... Support column, 3... Fixed heating plate, 4... Bottom heating plate,
5... Ram, 6... Guide plate, 6a,
6b... Guide groove, 7... Lower mold mounting board, 8... Roller, 9... Upper mold mounting board, 1
0...Koro, 11...Koro, 12...
...Connecting plate, 12 a... Long hole, B...
... Bracket, 13 ... Lower mold, 13 a.
...Lower die on the lower side, 13b...Lower die on the upper side, 14...Cylinder, 15...Elevating platform, 16... Lower mold support plate, 16a...
...Notch hole, 13C...Engagement piece.

Claims (1)

[Scope of utility model registration request] In a press machine in which the upper and lower molds are automatically opened and closed as the ram goes up and down, and the lower mold slides toward the front of the press when the ram descends, the lower mold is divided into an upper lower mold and a lower lower mold. The lower mold is fixed on a slide plate that slides up and down on the lower mold mounting plate, and the lower mold is raised and lowered by a cylinder to lift the upper lower mold to the lower take-out position. An elevating table is provided, and the elevating table is provided with a lower mold support plate that is installed opposite to the upper lower mold on the left and right sides with the lower mold mounting plate in between, and the lower mold support plate has an upper lower mold and an upper mold support plate. A notch hole is formed on the contact surface of the lower mold, and the engaging piece that serves as a fulcrum is fitted and supported so that the engaging piece can swing freely. A mold opening/closing device for a press machine, characterized in that it is provided on the side of the press machine.