JPH0438973Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a compression molding machine for resin plates.

(Conventional technology) Automobile front panels, body panels, etc.
SMC (Sheet) is a thermosetting resin sheet material.
Compression molding with Molding Compound
It is known from Japanese Patent Application Laid-open No. 60-15119, Japanese Patent Application Laid-Open No. 60-30323, etc.

That is, as shown in FIG.
An upper mold 6 is attached to a slide 5 which can be raised and lowered by pressurization by a sub (side) cylinder device 4,
A resin plate is compression molded in a cavity formed by upper and lower molds 6 and 2.

In this compression molding, in order to improve the quality of the product, the balance precision of the slide 5 (usually 5/100 mm) is
For this purpose, a leveling cylinder 9 consisting of a cylinder tube 7 and a piston rod 8 is provided on the bed 1 to control the balance of the slide.

(Problem to be solved by the invention) By the way, the upper mold 6 and the lower mold 2 (hereinafter also referred to as molds) are replaced with molds having different thicknesses (heights) depending on the intended product. Therefore, it is necessary to adjust the leveling cylinder 9 so that it contacts the slide 5 according to the thickness of the mold.

When the cylinder 9 has a short stroke, this adjustment is performed every time the mold is replaced using an adjustment rod since the cylinder 9 is fixed to the bed 1.
The effort was tedious, and it ended up hurting productivity. Furthermore, since the bed surface is the zero point, the adjustment rod itself must be accurate (approximately ±0.01/mm).

In addition, when the cylinder 9 has a long stroke, although there is no problem mentioned above, the dynamic characteristics of the cylinder change greatly (the oil volume in the cylinder changes greatly depending on the mold thickness), so it is impossible to control with a constant gain. , control performance changed, leading to product quality deterioration.

The present invention aims to solve the problems of the prior art.

(Means for Solving the Problems) The present invention has an upper mold 1 attached to a slide 15.
4 and a lower mold 19 attached to the bed 11, and compression molds the resin plate in the cavity formed by the upper and lower molds 14 and 19 that are clamped.
In order to achieve the stated purpose in a compression molding machine equipped with a mold height adjusting means and a means for ensuring slide balance accuracy, the following technical measures are taken.

That is, the present invention includes a plurality of telescopic leveling cylinders 20 that maintain the balance accuracy of the slide 15.
and a plurality of auto spacers 23 having a lifting member 24A that moves up and down according to the height of the mold, and in a state where the leveling cylinder 20 and the lifting member 24A are connected in the mold height direction Attach it to either bed 11 or slide 15, and attach it to the other bed 11 or slide 1.
5 is equipped with a leveling cylinder 20 that can come into contact with and separate from it, and is also provided with one drive motor 25 that drives a plurality of the elevating members 24A synchronously. It is characterized by comprising a detector 28 that detects the rotation of the motor 25 and a centralized computing unit 29 that is controlled by the detection signal.

(Embodiments and Operations) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In Figure 1, 10 is the SMC press, that is,
This is a compression molding machine for resin plates, and the frame is formed by connecting a bed 11 and a platen (crown) 12 with a plurality of columns (uprights) 13.

14 is an upper mold, which is detachably attached to a slide 15, and the slide 15 is attached to the platen 12.
A main cylinder device 16 and a side cylinder device 17 are attached to the main cylinder device 16 and a side cylinder device 17, and the main cylinder device 16 and the side cylinder device 17 are movable up and down, and 18 indicates an up/down guide shaft.

A lower mold 19 is removably attached to the bed 11, and cooperates with the upper mold 14 to constitute a mold device that forms a product cavity, and compression molds the resin in the cavity.

20 is a leveling cylinder, which consists of a cylinder tube 21 and a piston rod 22;
As shown in the figure, auto spacers 2 are attached to the bed 11 in a diagonal arrangement when viewed from the top (bottom view).
It is attached via 3.

The auto spacer 23 has a screw jack (hydraulic servo may also be used) 24, which can be raised and lowered by a drive motor 25, and is a lifting member (hereinafter sometimes referred to as jack member) 2.
4A is connected to the tube 21 of the leveling cylinder 20.

As shown in FIG.
1, the relay bevel gear 26,
The jacking member 24A is movable up and down via the transmission shaft 27 and the like.

Furthermore, the lifting and lowering of the jacking member 24A is performed by the motor 2.
5 is detected by a detector 28 and controlled by a central processing unit (CPU) 29 as shown in FIG. 3. In FIG. 3, 30 indicates a terminal.

Here, the zero point adjustment of the auto spacer 23 will be explained with reference to FIGS. , from the value, the amount of rise of the jacking member 24A, that is, the difference between the mold thickness ML and the cylinder length L (ML-L) is calculated.

Next, the slide 15 is lowered to bring the mold into close contact.

Thereafter, the drive motor 25 is operated in the upward direction to raise the jacking member 24A, and the rotation detector 28
Detects the amount of rise and raises it to the set value.

That is, the leveling cylinder 20 is raised to the set value.

Thereafter, the mold is clamped and the leveling cylinder 20 is pressurized, the leveling cylinder 20 is pressed against the slide 15, and after this state is maintained for a certain period of time, the zero point of the cylinder 20 is brought.

In all of the above embodiments, the auto spacer 23 is attached to the bed 11 side.
As shown in FIG. 6, the lifting member 24A of the auto spacer 23 and the leveling cylinder 20 are directly connected, the auto spacer 23 is attached to the slide 15 side, and the leveling cylinder 20 is provided on the bed 11 so as to be able to come into contact with and separate from it. It's okay to be hot.

(Effect of the invention) The invention is as described above, and with the auto spacer's lifting member and the leveling cylinder connected, the auto spacer can be attached to either the base or the slide, and the cylinder can be brought into contact with and separated from the other. The structure is simple, and when adjusting the height and zero point of the mold, it is possible to
There is no need to use an adjustment rod, which greatly simplifies the work, and the leveling cylinder can be used when adjusting the height of the mold, so the height of the mold can be adjusted without increasing the length of the lifting member. After that, it is fixed, and slight vibrations during leveling can be absorbed by the fluid pressure cushion of the leveling cylinder, and the weight during leveling control is reduced to only the piston, improving controllability.

In addition, by connecting the auto spacer's lifting member and the leveling cylinder, there is no need to use a long stroke leveling cylinder, and a short stroke cylinder with good hydraulic system response is sufficient. quality will improve.

Furthermore, a single drive motor is provided to drive the plurality of elevating members synchronously, and in order to set the amount of elevating and lowering the elevating members, a detector for detecting the rotation of the drive motor and a central processing unit for controlling using the detection signal are provided. The structure is simple and can be automatically controlled.

Since the present invention has the above-mentioned advantages, it is meaningful for use in compression molding machines for resin plates, which are thin products.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention and a conventional example.
The figure is a front view of the embodiment of the present invention, Figure 2 is a bottom view, and Figure 3 is a bottom view.
4 is a flowchart, FIG. 5 is a front view of the main part of the second embodiment of the present invention, FIG. 6 is a plan view of the same, and FIG. 7 is a front view of the conventional example. 11...Bed, 14...Upper die, 15...Slide, 19...Lower die, 20...Leveling cylinder, 23...Auto spacer.

Claims (1)

[Claims for Utility Model Registration] An upper die 14 attached to a slide 15 and a lower die 19 attached to a bed 11, and a cavity formed by the upper and lower dies 14 and 19 that are clamped together. In a compression molding machine that compression molds a resin plate and is equipped with a mold height adjustment means and a means for ensuring slide balance accuracy, a plurality of telescopic leveling cylinders 20 that maintain the balance accuracy of the slide 15, and a metal The leveling cylinder 2 includes a plurality of auto spacers 23 having a lifting member 24A that moves up and down according to the mold height.
0 and the elevating member 24A are connected in the mold height direction, the auto spacer 23 is attached to either the bed 11 or the slide 15, and the leveling cylinder 20 can be brought into contact with and separated from the other bed 11 or slide 15. In addition, one drive motor 25 is provided to drive a plurality of the elevating members 24A in synchronization, and a detector 28 for detecting the rotation of the drive motor 25 is provided to set the amount of elevating and lowering the elevating member 24. A compression molding machine for a resin plate, characterized in that it is equipped with a centralized computing unit 29 that is controlled by the detection signal.