JPH01181999A - Press forming device for composite resin material and the like - Google Patents

Abstract

PURPOSE:To press-form a forming material with good accuracy in a short time by the oil pressure source device of small capacity by providing the upper and lower slides in opposition having different material and stroke on the press forming device of a composite resin material and pressurizing a forming material by the upper and lower dies fitted thereto. CONSTITUTION:The forming material 12 of a composite resin material, etc., is subjected to press forming by the die device 10 consisting of an upper die 8 and lower die 9. The upper slide 5 fitting the upper die 8 is vertically moved by the moving cylinder 7 of small output and long stroke and the lower slide 6 fitted with the lower die 9 is made freely liftable by the pressurizing cylinder 11 of large output and short stroke to press-form the forming material 12 located on the lower die 9. A supporting rod 13 is provided on the upper slide 5 or a crown 2 and at the time when the upper slide 5 is descended up to the specified position the lower slide 6 is ascended by the pressurizing cylinder 11 after horizontally moving a slide locking device 16 to the one end face part of the lower slide 6 with the action of the supporting rod 13 and the forming material 12 is subjected to press forming with good forming accuracy by both dies 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hydraulic press device, and more particularly to a press molding device for composite resin materials.

Conventional technology In recent years, press molding of composite resin materials such as SMC has become popular.General conventional press equipment has a pressure cylinder with high output and long stroke in the crown part, and press molding of composite resin materials such as SMC has become popular. The mold was clamped by lowering the slide at high speed according to the dimensions of the mold for the molding material, and then switching to lower speed from a predetermined position to perform pressure molding.

However, a large-capacity hydraulic power source is required to operate the high-output, long-stroke pressurized cylinder, and a large amount of oil is consumed for high-speed closing and opening of molds that do not require large output. At the same time, there was a limit to the shortening of the opening during molding, and furthermore, the compressibility of oil in the long stroke pressure cylinder appeared during pressure molding, making it impossible to improve the precision of press molding.

Problem to be Solved by the Invention Therefore, the applicant provided a balance support device for a short stroke servo cylinder that supports the slide in balance at the four corners of the bed, thereby improving the accuracy of press forming. We have been developing press molding equipment with equipment.

However, since the pressure cylinder has a large capacity and a long stroke, the compressibility of the hydraulic power source slows down the molding speed, making it impossible to shorten the press molding time of the molding material.

Means for Solving the Problems The present invention has been made in view of the above-mentioned problems, and in order to solve the above-mentioned problems, an upper slide and a lower slide are vertically opposed to each other on an upright of a hydraulic press device. The upper slide is arranged so that it can be moved using a small-output, long-stroke moving cylinder, and the lower slide is arranged so that it can be moved up and down using a high-output, short-stroke pressure cylinder so that it can be press-formed. A support rod that supports the upper slide at a predetermined lowered position is installed in the slide part or the crown part, and a slide lock device is installed horizontally on one end surface of the support rod that protrudes when the upper slide is lowered to the predetermined position. A molding material such as a composite resin material loaded into a mold with an upper slide and a lower slide that can slide and freely come into contact with the slide lock material on one end surface of the support rod, pressurize the lower slide upward, and support the support rod. An object of the present invention is to provide a press molding apparatus for a composite resin material, etc., which is formed to be press moldable.

According to the present invention, when press molding a molding material such as a composite resin material, the upper slide is raised and lowered by a moving cylinder with a small output and a long stroke, and the upper slide is lowered at high speed to clamp the mold. The mold can also be lifted up at high speed to open the mold. In addition, by protruding an internal support rod from the upper slide portion or the crown portion and allowing a slide lock member to come into contact with one end surface of the rod using a slide lock device,
Even if the movable cylinder has a small output capacity, the lower slide is opposed to the upper slide, and the pressing force from the lower slide side can be firmly supported by the crown portion via the support rod.

Furthermore, by press-molding the molding material by pressurizing the lower slide with a high-output, short-stroke pressure cylinder, the pressure cylinder can be driven with a small-capacity hydraulic power source.
Moreover, the pressurizing cylinder can be pushed up and pressurized with high accuracy, and the stratification time can be shortened.

Example Hereinafter, the present invention will be explained based on examples.

FIG. 1 and subsequent figures show an embodiment of the present invention. Press device 1
is a hydraulic press, and as shown in Fig. 1, an upper slide 5 and a lower slide 6 of the required rigidity are arranged vertically opposite each other in the center surrounded by a crown 2, an upright 3, and a bed 4. There is. 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 has an upper mold 8 and a lower mold 9 fixed to the upper slide 5 and the lower slide 6. The mold 10 is clamped at high speed so that the mold can be opened. The lower slide 6 is made to move up and down along the upright 3 using a high-output, short-stroke pressure cylinder 11 installed inside the bed 4, and the composite resin plate, etc., is loaded into the mold 10 which is clamped by the upper slide 5. The molding material 12 can be press-molded. As shown in FIGS. 1 and 2, a support rod 1 of a predetermined length with sufficient rigidity is mounted on the upper surface of the upper slide 5.
3 are fixed in an axially symmetrical manner, and a corresponding portion of the upper side of the support rod 13 can be freely inserted into an opening 14 recessed in the crown 2, and when the upper slide 5 is lowered, it is inserted into the lower surface of the crown 2. The upper end surface of the support rod 13 is brought into contact with the slide lock member 17 of the slide lock device 16 which can freely open and close the opening 14 with the opening/closing cylinder 15, so that the support rod 13 can be freely supported. As shown, the lower slide 6 is pushed up through the die-hide position of the upper slide 5 locked by the slide lock device 17 to perform press molding.

On the other hand, on the lower surface of the lower slide 6, as shown in Fig. 1, a large-diameter, high-output force such as a ram cylinder is embedded in the bed 4 axially symmetrically to the lower slide 6 so as to support the lower slide 6 in equilibrium. Attach the upper end of the pressure cylinder 11 and
Each pressurizing cylinder 11 is synchronized with a predetermined hydraulic circuit over a short stroke of III-11 to push up the lower slide 6 with high accuracy. 18 is
This is a pull-back cylinder that pulls back the pressurizing cylinder 11.

Therefore, the upper slide can be lowered or raised at high speed by the high-speed lifting operation of the moving cylinder with a small output, and even though it is a moving cylinder with a small output, the support rod and slide lock device can be The upper slide can be locked at a predetermined die-hide position through the press molding.

Further, since the lower slide can be raised and press-formed using a short-stroke pressurizing cylinder, the lower slide can be operated quickly and with high precision, and the press-forming time can be shortened.

Another Embodiment FIG. 4 shows another embodiment of the present invention. In this example,
As shown in the figure, the support rod 13 is a threaded rod such as a square screw, and is attached to the upper slide 5 in a recessed part 19 that can be inserted into and taken out freely, and the support rod 13 is pivotally connected to the upper surface of the upper slide 5. The worm screws 2 are screwed into the screw holes drilled in the center of the worm gear 20 and engaged with the worm gear 20.
1 can be synchronously driven by a die-hide adjustment motor 22 via a required transmission shaft (not shown), so that the upper slide 5 can be set at a required die-cut position.

In this embodiment, the length of the support rod can be adjusted by moving up and down in accordance with the dimensions of the mold, and the upper slide can be stopped at an appropriate die-hide position, so that the press forming time can be shortened as much as possible.

In the above embodiments, the support rod is attached to the upper slide side, but it can also be attached to the crown side, the slide lock device is attached to the upper slide side, and the slide is supported by the support rod and press-formed. be.

In addition, in the above embodiment, the lower slide was carried out using a normal hydraulic cylinder, but a hydraulic servo system of the balance support device developed and filed by the applicant is used to support the lower slide in balance. The pressure cylinder can be raised and lowered in this way, the inflection point in the reaction process where the molding material hardens, contracts, and expands can be detected using a position detector or pressure detector, and the timer can be set. It is also possible to switch the pressurizing cylinder from position control to pressure control to maintain pressure balance and perform press molding so that eccentricity does not occur in the lower slide.

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

As described above, in the present invention, the upper slide has a small output,
The lower slide can be press-formed with a high-output, short-stroke pressure cylinder using a long-stroke movable cylinder, making it possible to minimize the capacity of the hydraulic power source and shorten press-forming time as much as possible. This makes it possible to minimize the effects of compressibility and eccentricity of hydraulic oil in the cylinder, thereby improving press forming accuracy.

[Brief explanation of the drawing]

1 and 2 are a partially omitted side view and a plan view of one embodiment of the present invention, FIG. 3 is an explanatory diagram of the usage state of the same, and FIG. 4 is a partially omitted side view of another embodiment of the same. FIG. 1... Press device, 2... Crown, 3... Upright, 5... Upper slide, 6... Lower slide,
7... Moving cylinder, 10... Mold, 11...
Pressure cylinder, 12... Molding material, 13... Support rod F, 16... Slide lock device, 17... Slide lock material. Applicant Kawasaki Oil Co., Ltd. Agent Patent Attorney Kuni Morimoto Figure 1 Figure 2 Figure 3 Figure 4 11i1 ■Sheep 44-

Claims (1)

[Claims] (1) An upper slide and a lower slide are arranged facing each other vertically on the upright of a hydraulic press device, and the upper slide is arranged so as to be movable by a small-output, long-stroke moving cylinder, and the lower slide A high-output, short-stroke pressure cylinder is installed that can be raised and lowered to enable press forming.
A support rod that supports the upper slide at a predetermined lowered position is installed inside the upper slide part or the crown part, and a slide lock device is installed horizontally on one end surface of the support rod that protrudes when the upper slide is lowered to the predetermined position. Molding of composite resin material, etc. loaded into a mold with the upper slide and lower slide supported by the support rod by sliding the slide lock material into contact with one end surface of the support rod and pressurizing the lower slide upward. A press molding device for composite resin materials, etc., characterized in that the material is formed to be press moldable.