JP2553373B2 - Press molding equipment for composite resin materials - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic press device, and particularly to a press forming device for a composite resin material or the like.

2. Description of the Related Art In recent years, press molding of composite resin materials such as SMC has become popular, but in general conventional press equipment, a high output, long stroke pressurizing cylinder is installed in the crown part, According to the size of the mold adapted to the molding material, the slide is moved down at a high speed to clamp the mold, and the predetermined position is switched to a low speed to perform pressure molding.

However, it requires a large-capacity hydraulic source to operate a high-output, long-stroke pressurizing cylinder, and consumes a large amount of oil for high-speed proximity and mold opening when molds that do not require large output are clamped. At the same time, there is a limit to the reduction of the molding time, and the effect of the compressibility of the oil in the long-stroke pressurizing cylinder is exerted during the press forming, so that the precision of the press forming cannot be improved.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, the applicant has arranged a balance cylinder supporting device for a short stroke servo cylinder supporting the slide in a balanced manner at the four corners of the bed to improve the precision of press molding. We have been developing press molding equipment with a built-in.

However, since the capacity of the pressurizing cylinder is large and the stroke is long, the molding speed is slowed by the compressibility of the hydraulic source, etc., and the press molding time of the molding member cannot be shortened.

Means for Solving the Problems The present invention has been made in view of the above points, and in order to solve the above problems, an upper slide and a lower slide are vertically opposed to an upright of a hydraulic press device. Arrange,
The upper slide is arranged so that it can be moved by a small output, long stroke moving cylinder, and the lower slide is arranged so that it can be moved up and down so that it can be press-molded by a large output, short stroke pressurizing cylinder. The slide lock device is horizontally slid and supported on the one end face of the support rod that is mounted when the upper slide is supported by the crown portion at the predetermined lowering position on the crown portion and the upper slide is lowered to the predetermined position. A slide lock material can be freely abutted on one end surface of the rod, and the molding material such as composite resin material loaded in the mold can be press-molded by the upper slide and the lower slide supported by the supporting rod by raising and pressurizing the lower slide. Another object of the present invention is to provide a press molding device for a composite resin material or the like characterized by being formed.

Operation According to the present invention, in press-molding a molding material such as a composite resin material, the upper slide is moved up and down by a moving cylinder having a small output and a long stroke to descend at a high speed to form a mold. It can be tightened or can be raised at high speed to open the mold. In addition, even if the moving cylinder has a small output capacity, the upper slide part or the crown part protrudes from the internal support rod and the slide lock device can abut on one end surface of the support rod even if the moving cylinder has a small output capacity. The pressing force from the lower slide side can be firmly supported by the crown portion via the support rod while facing the lower slide. Furthermore, by press-molding the molding material by pressurizing the lower slide with a high-output, short-stroke pressurizing cylinder, the pressurizing cylinder can be driven by a small-capacity hydraulic power source device and the pressurizing cylinder can be pushed up accurately. It is possible to pressurize and shorten the molding time.

Examples Hereinafter, the present invention will be described based on Examples.

FIG. 1 and the following are examples of the present invention. The press device 1 is a hydraulic press, and as shown in FIG.
An upper slide 5 and a lower slide 6 having a required rigidity are arranged so as to face each other vertically in a central portion surrounded by the upright 3 and the bed 4. The upper slide 5 is movable along the upright 3 by a small output, long stroke moving cylinder 7 attached to the crown 2, and the upper mold 5 and the lower mold 9 fixed to the upper slide 5 and the lower slide 6 are movable. The mold 10 of and is clamped at high speed so that the mold can be opened. Then, the lower slide 6 is installed in the bed 4 so that it can be moved up and down along the upright 3 by a high-output, short-stroke pressurizing cylinder 11, and a composite resin plate loaded in the mold 10 clamped by the upper slide 5 and the like. The molding material 12 of 1. is press-moldable.
As shown in FIGS. 1 and 2, a support rod 13 having a predetermined rigidity and having a predetermined length is fixed to the upper surface of the upper slide 5 in an axially symmetrical manner, and a corresponding portion on the upper side of the support rod 13 is crowned. It can be inserted into the opening 14 recessed in 2, and
A sufficiently rigid sloyd lock member 17 of a slide lock mounting member 16 capable of opening and closing the opening 14 by an opening / closing cylinder 15 inserted into the lower surface of the crown 2 when the upper slide 5 is lowered.
The upper end surface of the supporting rod 13 is brought into contact with the supporting rod 13 so that the supporting rod 13 can be supported, and the lower slide 6 is pushed up through the die height position of the upper slide 5 locked by the slide lock device 17 as shown in FIG. Is what you are doing.

On the other hand, on the lower surface of the lower slide 6, as shown in FIG. 1, a large-diameter and large-power output such as a ram cylinder embedded axially symmetrically in the lower slide 6 so as to support the lower slide 6 in a balanced manner is applied. Attach the upper end of the pressure cylinder 11, and press each cylinder over a short stroke of 60 to 100 mm.
The lower slide 6 is pushed up accurately by synchronizing 11 with a predetermined hydraulic circuit. Reference numeral 18 is a pull-back cylinder that pulls back the pressure cylinder 11.

Therefore, the upper slide can be lowered at a high speed or raised at a high speed by the high-speed lifting operation of the small-output moving cylinder, and the support rod and the slide lock device can be installed despite the small-output moving cylinder. Through this, the upper slide can be locked in a predetermined die height position and press-molded.

Further, since the lower slide can be raised by a short-stroke pressurizing cylinder and press-molded, the lower slide can be operated quickly and accurately, and the press-molding time can be shortened.

Other Embodiments FIG. 4 shows another embodiment of the present invention. In the present embodiment, as shown in the figure, the support rod 13 is mounted on the upper slide 5 as a screw rod such as a square screw so as to be freely inserted into and removed from the recessed portion 19 of the opening, and the support rod 13 is pivoted on the upper surface of the upper slide 5. The worm gear 20 is attached to the center of the worm gear 20, and the worm screw 21 engaged with the worm gear 20 is tuned by the die height adjusting motor 22 via the required transmission shaft (not shown). It can be driven freely, and the upper slide 5 can be set at a desired die height position.

In this embodiment, the length of the support rod can be adjusted up and down according to the size of the mold, the upper slide can be stopped at an appropriate die height position, and the press molding time can be shortened as much as possible.

In the above embodiments, the support rod is mounted on the upper slide side, but it is also possible to mount it on the crown side, mount the slide lock device on the upper slide side, and support the slide with the support rod for press molding. is there.

Further, in the above embodiments, the lower slide was carried out by using a normal hydraulic cylinder, but a hydraulic servo system of the balance support device developed and applied by the applicant is used to support the lower slide in balance. In this way, the pressure cylinder moves up and down, the molding material hardens and contracts, and the inflection point of the reaction process that expands is detected by the position detector and pressure detector, and the setting of the timer etc. It is also possible to switch the pressurizing cylinder from position control to pressure control so as to maintain pressure balance and perform press molding so that eccentricity does not occur in the lower slide.

Although the composite resin material has been described as the molding material, it is obvious that a plastic material such as a synthetic resin material can be appropriately applied.

As described above, in the present invention, the upper slide can be press-molded by the small output, long stroke moving cylinder, and the lower slide can be press-molded by the large output, short stroke pressurizing cylinder. The capacity can be made as small as possible, the press molding time can be shortened as much as possible, and the compressibility of hydraulic oil in the pressurizing cylinder and the effect of eccentricity can be minimized to improve the press molding accuracy.

[Brief description of drawings]

FIGS. 1 and 2 are a side view and a plan view of an embodiment of the present invention with a part thereof omitted, FIG. 3 is an explanatory view of a state of use in the same as above, and FIG. FIG. 1 ... pressing device, 2 ... crown, 3 ... upright, 5 ... upper slide, 6 ... lower slide, 7 ... moving cylinder, 10 ... die, 11 ... pressurizing cylinder, 12 ...
… Molding material, 13 …… Support rod, 16 …… Slide lock device, 17 …… Slide lock material.

Claims (1)

(57) [Claims] 1. An upright of a hydraulic press device is provided with an upper slide and a lower slide which are vertically opposed to each other, and the upper slide is movably provided by a moving cylinder having a small output and a long stroke. The lower slide is arranged so that it can be moved up and down so that it can be press-molded by a high-output, short-stroke pressurizing cylinder, and the upper slide part or the crown part is internally equipped with a support rod that supports the upper slide at the predetermined descending position on the crown part. When the upper slide is lowered to a predetermined position, the slide lock device is horizontally slid on one end surface of the supporting rod that protrudes to allow the slide lock member to abut on one end surface of the supporting rod, and the lower slide is raised and pressed. Composite resin characterized in that a molding material such as a composite resin material loaded in a mold is press-moldable by an upper slide and a lower slide supported by a supporting rod. Press molding apparatus and the like.