JPH0439014A - Position-adjustable die clamping device - Google Patents

Abstract

PURPOSE:To enable the title device to correspond to molds in various dimensions, by a method wherein the title device possesses a clamping cylinder, which is fixed to a clamping body and moves a wedge, and a moving cylinder, which is fixed to a platen and moves the clamping body and clamps the mold by swinging a clamping claw through the wedge by operating the clamping cylinder. CONSTITUTION:When a mold 46 and die clamping device come into contact with each other, hydraulic pressure in an oil path 38 side of a moving cylinder 36 is raised. Therefore, not only a pressure switch 43 but also a proximity switch 44 laid into a clamping body 11 are operated, oil is fed within a clamping cylinder 12 and a flange part 36a of the mold 46 is clamped. Furthermore, a wedge hole 14 is formed into the center of the clamping body 11 by penetrating through the same and a clamping claw 18 is arranged to be freely swung in front of the same. When a wedge 15 is moved in front within the wedge hole 14, the clamping claw 18 is swung and a wedge surface 15a presses the clamping claw 18. Consequently, the tip of the clamping claw 18 presses the flange part 46a downward and the mold 46 is clamped down to the platen 32.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a position-adjustable die clamp device for a molding machine.

(Prior art) Conventionally, a molding material heated and fluidized in a heating cylinder is injected into a mold under high pressure, cooled and solidified or hardened therein, and then the mold is opened to take out the molded product. The injection molding machine has the following structure.

That is, a mold clamping device and an injection device are installed on the machine base, and the nuclear mold clamping device is equipped with a fixed platen and a movable platen, and when the mold clamping cylinder reciprocates the movable platen, the fixed mold and the movable mold come into contact with and separate from each other.

On the other hand, the injection device is equipped with a reciprocating nozzle that heats and melts the resin supplied from the hopper and injects it, and the molten resin is injected from the nozzle into the recess, that is, the cavity formed between the two molds. be done.

In a molding machine having a configuration like the above-mentioned injection molding machine, a movable mold is removably attached to a movable platen and a fixed mold to a fixed platen, and both molds can be replaced if the molded product is different. ing.

Therefore, die clamps are provided on both platens so that respective molds can be easily attached and detached.

Fig. 3 is a perspective view showing the installation state of a conventional die clamp device, Fig. 4 is a diagram of the clamping state of the conventional die clamp device, Fig. 5 is a diagram of the unclamping state of the conventional die clamp device, and Fig. 6 is a perspective view of a conventional mold. In the figure, a die clamp for attaching a fixed mold to a fixed platen will be explained.

In FIG. 3, reference numeral 2 indicates a fixed platen, and 2 indicates four tie bars extending from the fixed platen 1. In FIG. 3 is a locate ring opening formed to facilitate attachment of the fixed mold to the fixed platen 1 and smooth nozzle touch, and 4 is a clamp for fixing the fixed mold on the fixed platen 1. .

In FIG. 4, 11 is a clamp body, and 12 is a clamp cylinder provided adjacent to the clamp body 11. The clamp body 11 is fixed to the fixed platen 1 via a fixed hole 3, and has a wedge hole 14 formed through it in the center. Then, the wedge hole 14
A wedge 15 is adapted to slide inside. A wedge surface 15a is formed on the lower front surface of the sea urchin 15.

Further, in the front of the clamp body 11, a "<"-shaped clamp pawl 18 is arranged to be swingable about the shaft 17. The clamp claw 18 has a sliding surface 18a formed in a portion corresponding to the wedge surface 15a.

When the wedge 15 moves forward as shown in FIG. 4, the clamp claw 18 swings accordingly, and the wedge surface 15a pushes the sliding surface 18a of the clamp claw 18. As a result, the tip of the clamp claw 18 presses the flange portion 19a of the stationary mold 19 downward, and the stationary mold 19 is clamped to the stationary platen 1.

Further, as the wedge 15 moves backward as shown in FIG. 5, the clamp claw 1B swings accordingly, and the wedge surface 15a separates from the sliding surface 18a of the clamp claw 18. As a result, the tip of the clamp claw 18 separates from the flange portion 19a of the stationary mold 19, making it possible to remove the stationary mold 19 from the stationary platen l.

In order to reciprocate the wedge 15, the wedge 15
and the piston 2o are connected via a rod 21,
By supplying oil into the clamp cylinder 12, the piston 20 reciprocates within the clamp cylinder 12. That is, when oil is supplied into the oil chamber 12a on the right side of the piston 20, the wedge 15 moves to the left, and when oil is supplied into the oil chamber 12b on the left side of the piston 20, the wedge 15 moves to the right. Move to.

FIG. 6 shows that the fixed mold 19 and the movable mold 25 are connected to a connecting bin 26.
This shows a state in which they are in contact with each other. Flange portion 19a of fixed mold 19 and flange portion 25a of movable mold 25
are respectively clamped to the fixed platen and the movable platen by the die clamping device having the above configuration.

Note that 19b is a locate ring formed on the fixed mold 9.

(This is a problem to be solved by the invention!) However, in the die clamp device having the above configuration, the clamp body 11 is attached to the fixed platen 1 by the fixing bolts.
3 and cannot be removed.

Therefore, if the molded product is different, the mold must be replaced, but even if the cavity within the mold changes, the dimensions of the mold need to be matched to the guide clamp. Therefore, one platen cannot be used for a wide variety of molds.

That is, it is necessary to standardize the mold dimensions J and K (Fig. 6).

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional force clamp device and to provide a position adjustable force clamp device that can accommodate molds of various sizes.

(Means for Solving the Problems) For this purpose, the position-adjustable grip clamp device of the present invention includes a platen having a groove formed in the direction of the mold, and a platen disposed movably along the groove. It has a clamp body, a wedge that is arranged to move freely forward and backward within the clamp body, and a clamp claw that swings in response to the forward and backward movement of the wedge and presses the flange portion of the mold toward the platen. .

A clamp cylinder is fixed to the clamp body and moves the wedge forward and backward; a moving cylinder is fixed to the platen and moves the clamp body; and a moving cylinder is arranged at the front end of the clamp body to make contact between the clamp body and the mold. and a pressure switch disposed in the oil passage of the movable cylinder to detect contact between the clamp body and the mold, and the clamp cylinder is actuated by detection of both the switches. It has become.

(Function) According to the present invention, as described above, the platen has a groove formed in the direction of the mold, the clamp body is disposed so as to be movable along the groove, and the clamp body can move back and forth freely within the clamp body. The mold has a wedge disposed in the mold, and a clamp claw that swings in response to the advance and retreat of the wedge and presses the flange portion of the mold toward the platen.

The clamp cylinder is fixed to the clamp body and moves the wedge forward and backward, and the moving cylinder is fixed to the platen and moves the clamp body. The mold can be clamped by swinging the clamp claw.

Additionally, a proximity switch is installed at the front end of the clamp body to detect contact between the clamp body and the mold, and a pressure switch is installed in the oil path of the moving cylinder to detect contact between the clamp body and the mold. Since the clamp cylinder is actuated by the detection of both switches, it is possible to prevent the clamp cylinder from being actuated until the clamp body comes into contact with the mold.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a position-adjustable grip clamp device of the present invention, and FIG. 2 is a sectional view of a dovetail groove formed in a platen.

In the figure, 11 is the clamp body, 12 is the clamp 7"
, +- is a clamp cylinder provided adjacent to the day 11. As shown in FIG. 2, the clamp body 11 is supported by a support member 31 formed in an approximately rHJ shape, and the lower flange portion 31a of the support member 31 is
a groove formed in the platen 32 toward the mold 46;
For example, it is adapted to slide within a dovetail groove 33.

That is, the gourd clamp device can slide in the direction of arrow A along the dovetail groove 33. In order to move the grip clamp device, a moving rod 35 is fixed to the lower flange portion 31a of the support member 31, and the moving rod 35 is reciprocated by a moving cylinder 36. The stroke at that time is S.

Therefore, the moving cylinder 36 has a port 36a.

36b, and each port 36a, 36b is connected to an electromagnetic switching valve 40 via oil passages 37, 3B.

The electromagnetic switching valve 40 has a T port communicating with the drain tank and a P port communicating with the pump, and can assume two positions by operating a solenoid. The diagram is
The oil passage 38 side is connected to the pump, and the oil passage 37 side is drained, and the piston 2 in the moving cylinder 36
0 is moving farthest to the left.

At this time, the die clamp device F can be clamped.

In addition, if the rupture switching valve 40 is placed in the opposite position in 1 above, the oil passage 38 side is drained, the oil passage 37 side is connected to the pump, and the piston 20 in the moving cylinder 36 moves to the far right. . At this time, the die clamp device is released.

Further, 41 and 42 are needle valves that adjust the flow rate in the oil Ia 37 and 38, and 43 is a pressure switch that detects the pressure in the oil path 38. The oil passage 3 detected by the pressure switch 43
It is determined whether or not the die clamp device can operate based on the pressure inside the die clamp device.

The operation of the die clamp device is also determined by a proximity switch 44 fixed to the front end of the clamp body 11. The proximity switch 44 is connected to the moving cylinder 36.
The clamp body 11 moves to the left by the operation of
The proximity switch 44 is arranged to be turned on when it comes into contact with the mold 46.

When the clamp body 11 is moved to a position where it comes into contact with the mold 4G by the moving cylinder 36, the die clamp device is subsequently activated and the mold 46 is clamped to the platen 32.

Therefore, a wedge hole 14 is formed through the center of the clamp body 11, and the wedge 1 is inserted into the wedge hole 14.
5 is designed to slide. A wedge surface 15a is formed on the lower front surface of the sea urchin 7 ji 15.

In addition, a "<"-shaped clamp claw 18 is swingably disposed at the front of the clamp body 11.

When the wedge 15 moves forward, the clamp claw 18 swings accordingly, and the wedge surface 15a pushes the clamp claw 18. As a result, the tip of the clamp claw 18 pushes the flange portion 46a of the mold 46 downward. Press to clamp the mold 46 to the platen 32.

Further, when the wedge 15 moves rearward, the clamp claw 18 swings accordingly, and the wedge surface 15a separates from the clamp claw 18. As a result, the tip of the clamp claw 18 separates from the flange portion 46a of the mold 46, and the mold 46
can be removed from the platen 32.

Here, in order to reciprocate the wedge 15, the wedge 15 and a piston 20 are connected via a rod 21, and by supplying oil into the clamp cylinder 12, the piston 20 moves inside the clamp cylinder 12. It is supposed to be a round trip.

Therefore, the clamp cylinder 12 is equipped with a boat 12.
a, 12b are provided, each port 12a, 1
2b is connected to the electromagnetic switching valve 50 via oil passages 48 and 49.

It has a magnetic switching valve 50, a T boat that communicates with the drain tank, and a P port that communicates with the pump, and can take two positions by operating a solenoid.
The figure shows a state in which the oil I4B side is connected to the pump and the oil path 49 side is drained, and the piston 20 in the clamp cylinder 12 has moved farthest to the right. At this time, the wedge 15 is retracted and the die clamp device is released.

Furthermore, when the electromagnetic switching valve 50 is placed in the opposite position, the oil passage 48 side is drained and the oil passage 49 side is in communication with the pump, and the piston 2 in the clamp cylinder 12
moves to the far left. At this time, the wedge 15 moves forward and the die clamp device clamps the mold 46.

In the position-adjustable die clamp device having the above configuration,
When a mold is mounted, it is moved to the outer peripheral side of the platen 32 by the moving cylinder 36 and placed in a standby state. Then, after the mold is mounted and positioning is completed using positioning pins, locate links, etc. of the mold, the moving cylinder 36 is operated to move the die clamp device toward the mold 46.

When the mold 46 and the die clamping device come into contact, the oil pressure in the oil passage 38 of the movable cylinder 36 increases, which is activated by the pressure switch 43, which causes the pressure switch 43 to actuate the hydraulic pressure in the oil passage 38 of the movable cylinder 36. switch 4
4 also works. Proximity of the die clamp device is confirmed by activation of both switches.

Then, on the condition that both the proximity switch 44 and the pressure switch 43 are on, oil is supplied into the clamp cylinder 12 and the flange portion 46a of the mold 46 is clamped.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, a platen having a groove formed in the direction of the mold, a clamp body disposed movably along the groove, and a clamp body arranged to be movable along the groove. The clamp body includes a wedge that is freely movable forward and backward within the clamp body, and a clamp claw that swings in response to the forward and backward movement of the wedge and presses the flange portion of the mold toward the platen.

The clamp cylinder is fixed to the clamp body and moves the wedge forward and backward, and the moving cylinder is fixed to the platen and moves the clamp body. The mold can be clamped by swinging the clamp claw.

Therefore, each time the mold is changed, the clamp body can be clamped at the position where the clamp body is brought into contact with the mold by operating the clamp device, and it becomes possible to adapt to molds of various sizes.

Additionally, a proximity switch is installed at the front end of the clamp body to detect contact between the clamp body and the mold, and a pressure switch is installed in the oil path of the moving cylinder to detect contact between the clamp body and the mold. Since the clamp cylinder is actuated by the detection of the proximity switch and the pressure switch, the clamp cylinder cannot be actuated until the clamp body comes into contact with the mold.

Therefore, the operation of the clamp can be automated and work costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a position-adjustable grip clamp device of the present invention, Fig. 2 is a sectional view of a dovetail groove formed in a platen,
Fig. 3 is a perspective view showing the installation state of the conventional gui clamp device, Fig. 4 is a clamping state diagram of the conventional gui clamp device, Fig. 5 is an unclamping state diagram of the conventional gui clamp device, and Fig. 6 is a diagram of the conventional gui clamp device. FIG. 3 is a perspective view of a mold. 11... Clamp body, 12... Clamp cylinder, 15... Wedge, 18... Clamp claw, 32
...Platen, 33...Dovetail groove, 36...Moving cylinder, 43...Pressure switch, 44...Proximity switch, 46...Mold. Figure 2 Patent Applicant Sumitomo Heavy Industries, Ltd. Sub-Agent Patent Attorney Makoto Kawai (1 other person) Figure 3 Figure Figure / Ria

Claims (1)

[Claims] (a) A platen with a groove formed in the direction of the mold; (b) A clamp body disposed movably along the groove; (c) A clamp body disposed within the clamp body. (d) a clamp claw that swings in response to the advance and retreat of the wedge and presses the flange portion of the mold toward the platen; (e) a clamp claw that is fixed to the clamp body. (f) a moving cylinder fixed to the platen and moving the clamp body; (g) disposed at the front end of the clamp body to detect contact between the clamp body and the mold; (h) a pressure switch disposed in the oil passage of the movable cylinder to detect contact between the clamp body and the mold; (i) a pressure switch that detects contact between the clamp body and the mold; (i) a proximity switch that detects contact between the clamp body and the mold; 1. A positionally adjustable die clamp device, characterized in that it has means for actuating.