JPS5838118A - Clamping apparatus of mold - Google Patents

Abstract

PURPOSE:To perform effectively the clamping when a material is injected, by incorporating a hose between a movable mold and a moving plate, and inflating the diameter of the hose by the action of fluid pressure. CONSTITUTION:The resilient hose 17 having one end closed is incorporated between the first moving plate 9 secured tothe movable mold 4 and the second moving plate 10 connected to movable mold moving apparatuses 7, 8, and the first and second moving plates 9, 10 are connected through connecting members 11 in such a way that the distance between them can be varied within a prescribed range. When the molds 3, 4 are closed by an air cylinder 7 and a material is filled, fluid pressure is applied to the resilient hose 17 to expand the diameter of the hose so that the first moving plate 10 forces the mold 4 against the mold 3. Thus, the clamping when the material is injected can be effectively performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold clamping device for a mold for molding rubber or synthetic resin.

Conventionally, mold clamping mechanisms for molds include a toggle type, a booster type, a pressure increase type, a direct pressure type, etc. However, the toggle type has a large number of parts, the device is large, and it is difficult to adjust the stroke, etc.

The booster type and pressure increasing type require the use of a special cylinder, making the equipment expensive. The direct pressure type has low mold opening resistance and low opening/closing speed when pouring material into the mold, and increasing K requires a larger cylinder device or higher supply pressure, which has its own problems.

Generally, the operation of a mold clamping device can be divided into an operation of moving a movable mold to open and close the mold, and an operation of closing the mold and clamping the mold when filling the mold with material. The present invention incorporates a hose that expands and expands in diameter by applying fluid pressure to a moving plate that connects a movable mold and a fluid pressure cylinder etc. that drives the movable mold, and uses the expansion force of the hose to tighten the mold during material injection. It is characterized by letting people do the following. According to the present invention, the movable mold can be opened and closed using a small cylinder, and the mold can be effectively clamped by the expansion force of the hose during material injection, contributing to the simplification of the apparatus.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

In the figure, reference numeral 1 denotes a base, on which a lower die fixing plate 2 is installed, and a lower die (fixed die) 3 is attached to the plate 2. Fixed plate 2 has 2 parts on both sides.
There is a book Diaper 5 standing upright. A cylinder fixing plate 6 is fixed to the upper end of the dial 5, and an air cylinder 7 is installed on the plate 6. A rod 8 of the air cylinder 7 passes through the plate 6 and extends downward between the two dials 5 in parallel thereto. A movable plate 10 is fixed to the lower end of the rod 8. This moving plate 1o has semicircular notches 101 formed on both sides, and die moving plates 9 are disposed in each of the semicircular notches 101. This movable plate 9 (hereinafter referred to as the first movable plate) also has notches similar to those described above on both sides thereof, and is capable of sliding on the diper 6. The first and second movable plays) 9 and loq are connected by a dedication member 11 at one point on their side surfaces, and both plays) 9 and 10 are movable relative to each other in the vertical direction within the range regulated by the member 11. 1st and 2nd moving play) 9.1
0, the shaft member 12 is penetrated from above and both plays) 9.1
Serves as a guide when moving 0. A safety mold (movable mold) 4 is attached to the lower surface of the first s#L plate 9.

A rectangular stop plate 13 is rotatably attached to the center of the lower surface of the cylinder fixing plate 6. In addition, holes 14 are formed in two places in the cylinder fixing plate 6 ◇The stop plate 13 is urged by an air cylinder 15 provided on the lower surface of the cylinder fixing plate 6, and the holes 14 are opened and closed by rotation. .

Two stoppers 16 are erected on the upper surface of the second moving plate 10. And this stopper 1
The upper end of the cylinder fixing plate 6 can be inserted into the hole 14 of the cylinder fixing plate 6 in a fingerable manner.

An elastic hose 17 is installed in a spiral shape between the first and second moving plays (9.10). The end of the hose 17 located in the center of the fabric is closed and the other end is connected to the finished presser. Each part of the spiral hose 17 is in contact with each other in a state where no air is supplied 9, and its outer periphery is restricted from moving outward by a substantially circular protrusion 18 provided on the first movable plate 9. There is.

A plunger 19 for injecting a charge into a mold cavity (not shown) is inserted into the lower mold 3, and a plunger drive device 2o is installed below the fixed plate 2.

In the mold clamping device configured as described above, the air cylinder 7 is operated to lower the rod 8, and the upper mold 4 connected to the rod 8 via the sugar 1 and the second moving plate 9.10 is moved to the lower mold 3. Close the pieces together. At this time stopper 16
The upper end portion extends below the hole 14 of the cylinder fixing plate 6. When the rod 8 is lowered and the mold is closed, stop play is performed by the cylinder 15 activated by a solenoid)
13 closes the hole 14 of the rotating L1 plate 6. Next, air is supplied to the near compressor hose 7. As a result, the diameter of the hose 7 is expanded, and a force is applied to the first and second movable plates 9 and 10 in the direction of separating them.

However, the upper end L stop plate 1 of the stopper 16
3, the upward movement of the second movable plate 10 is restricted, and the expansion force of the hose 7 moves the upper mold 4 to the first movable plate 10.
The mold is strongly pressed downward via the moving plate 9, that is, against the lower mold 3, and the mold is firmly clamped. In this state, the material is supplied into the mold and molded. After molding, the air in the hose 7 is removed. Next, the stop plate 13 is rotated by the air cylinder 15, and the hole 14 of the cylinder fixing plate 6 is opened. The cylinder dog is then actuated to raise the rod 8 and the upper mold 4, which is connected to the rod 8 via the moving plate 9, 10, to open the mold.

At this time, the self-stopper 16 is inserted into the hole 14 and raised.

As described above, in the apparatus of the present invention, the cylinder +7 for driving the upper mold only performs the function of raising and lowering the upper mold, so that a sufficiently high raising and lowering speed can be obtained with a small cylinder with a small force. Also, when clamping the mold, a large amount of force is required to tighten the mold, but 7 hose companies fiP! The entire surface touches the first and second moving brakes) 9.10, so play) 9.10
The pressure-receiving area is large, and a large tightening force can be obtained with a relatively small supply pressure. Moreover, since an elastic hose is used, the structure is inexpensive and simple.

As described above, the mold clamping device of the present invention has a simple structure, requires less energy for mold clamping, and contributes to energy saving.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway front view of the device, Fig. 2 is a sectional view taken along arrow n-111 in Fig. 1, and Fig. 3 is a cross-sectional view of the device. FIG. 4 is an enlarged cross-sectional view taken along the line 1-1 in the figure, and FIG. 4 is an enlarged cross-sectional view taken along the line ■-y in FIG. 3...Fixed type No....Movable type 7.
...Air cylinder 9...First moving plate 10...Second moving plate 11...Moving plate connecting member 17...
・Hose Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] a fixed mold, a movable mold forming a cavity between the fixed mold, a device for reciprocating the movable mold, a first moving plate connected to the movable INK, and a first moving plate connected to the movable moving device. a connecting member connecting the first and second moving plates such that the facing gap between them is variable within a predetermined range; an elastic hose with a closed end interposed therebetween; a fluid pressure supply means for supplying fluid pressure into the hose; It is equipped with a stopper that restricts movement in the direction away from the movable plate, and when the movable lid moves and the mold is closed, fluid pressure is supplied to the hose to expand the hose diameter and increase the gap width. A mold clamping device characterized in that a movable mold is pressed against a fixed mold by an enlarged first movable plate.