JPH0719775Y2 - Mold fixing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure for fixing a mold used for resin injection molding or the like to a mold support base.

[Conventional technology]

Generally, a mold used for resin injection molding or the like is fixed to a support for mounting the mold, regardless of whether the mold is fixed or movable.

An example of this fixing structure is shown in Japanese Utility Model Publication No. 61-170514. The mold support shown here is
There is a locking groove around the mounting position of the mold, one end of the fixing bolt is locked in this locking groove, and a claw material is attached to the other end, and the claw material pushes the mold to the support base side. I am trying to attach it. According to this structure, the dies having various shapes can be fixed to the support base by appropriately changing the locking position of the fixing bolt.

[Problems to be solved by the device]

When mounting the mold in the above structure, first set the mold on the support base at a predetermined position, slide the fixing bottle along the locking groove in accordance with this position, and attach it to the fixing bolt. A relatively troublesome work such as tightening the nut from above with the claw member in contact with the mold is required. Therefore, it takes a considerable amount of time to attach and detach the die when exchanging the die, and shortening the die is an issue.

The present invention has been made in view of such circumstances, and an object thereof is to provide a structure capable of fixing a mold used for resin molding or the like to a mold support base by a simple operation.

[Means for Solving the Problems]

The present invention is mounted on a mold supporting base so that it can be contacted and separated from the mold supporting base in a direction substantially parallel to the mold mounting surface with respect to the mold mounting position, and the mold is mounted at the position where it contacts the mold. In a mold fixing structure comprising a pair of fixing members having a shape for pressing on the mold mounting surface of the mold supporting base, the inside of the mold supporting base in a direction substantially parallel to the mold mounting surface. A single feed screw shaft that is rotatably supported on both sides and that has male screw portions with mutually different spiral directions formed on both sides, and drive means that rotationally drives this feed screw shaft. The fixing member has a shape extending in a direction orthogonal to the axial direction of the screw shaft, and these fixing members are screwed into the male screw portions of the feed screw shaft at positions symmetrical with respect to the axial direction of the feed screw shaft about the mounting position of the mold. By fitting them together, both fixing members will rotate as the feed screw shaft rotates. In a direction toward or away from the stomach is obtained by adapted to simultaneously move.

[Action]

According to the above structure, with the two fixing members separated from each other, the mold is set at a predetermined mold attachment position between the two fixing members, and then the feed screw member is rotationally driven by the driving means. By bringing the fixing members close to each other and bringing them into contact with the mold, the mold can be fixed on the mold mounting surface by the fixing member.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

The resin forming apparatus shown in FIG. 3 includes a fixed side mold 10, a fixed side support base (mold support base) 12, a movable side mold 14, and a movable side support base (mold support base) 16. The fixed mold 10 is fixed at a predetermined position on the fixed support 12, and the movable mold 14 is fixed at a predetermined position on the movable support 16.

Of these, the structure for fixing the movable mold 14 to the movable mounting plate 16 will be described with reference to FIGS. 1 and 2A and 2B.

As shown in FIG. 1, the movable mold 14 is a movable mold plate.
The spacer block 20 is provided with 18, a spacer block 20, and a movable side mounting plate 22, and an ejector plate 24 to which an ejector pin (not shown) is mounted is housed in the spacer block 20.
The movable side mounting plate 22 has a rectangular planar shape,
Tapered portions 221 having a shape in which the plate thickness decreases outward are formed on both upper and lower edges thereof.

On the other hand, a through hole 161 is formed in the up-down direction at a substantially central portion of the movable support 16, and a ball screw member (feed screw member) 28 is mounted in the through hole 161. Specifically, bearings 32 are attached to the upper and lower end portions of the through hole 161 via mounting plates 30, and the bearing 32 allows the ball screw member 28 to be attached.
The upper and lower ends of the are rotatably supported.

This ball screw member 28 has male screw portions 281 having mutually different spiral directions on both upper and lower sides, and a pair of upper and lower clamp members (fixing members) 34 are attached to these screw portions 281.

This clamp member 34 is placed in the left-right direction of the mold (Fig. 2 (a)).
A pair of left and right claw members 38 and a female screw member 39 are fixed to a substrate 36 extending in the left and right direction of (b), and the male screw portion 281 of the ball screw member 28 penetrates the female screw member 39. It is screwed. The claw member 38 is projected to the outside of the mold support 16 through a guide groove 162 provided in the mold support 16, and a projecting portion 381 projecting toward the center of the mold is formed at the end thereof. Has been done. The lower surface of the protruding portion 381 is a tapered surface 382 that matches the tapered portion 221 of the movable side mounting plate 22. Further, the guide groove 162 has a shape extending in the vertical direction, and restricts the movement of the claw member 38 in the horizontal direction.

Therefore, by rotating the ball screw member 28,
As the claw member 38 is guided by the guide groove 162, the entire clamp member 34 moves in the vertical direction, and both clamp members 34 move in the directions in which they approach and separate from each other, that is, in the directions opposite to each other. Become.

On the other hand, the upper end portion of the ball screw member 28 is connected to a hydraulic motor (driving means) 42 via a clutch 40, and the ball screw member 28 is rotationally driven by the hydraulic motor 42.

Next, a procedure for fixing the movable mold 14 with this structure will be described.

First, as shown by the solid line in FIG. 1, with the upper and lower clamp members 34 separated from each other, the movable mold 14 is placed substantially in the center of the surface of the movable support base 16 on which the claw members 38 project. set. Next, by operating the hydraulic motor 42 and switching on the clutch 40, the ball screw member is turned on.
28 is driven to rotate, and both clamp members 34 are moved to the movable mold 14
Get closer to. Then, as shown by the alternate long and two short dashes line in FIG. 1, the clutch 40 is switched off in a state where the tapered surface 382 of the protruding portion 381 of each claw member 38 is completely in contact with the tapered portion 221 of the movable side mounting plate 22. By stopping the rotation of the ball screw member 28 and the movement of the clamp member 34, the pawl member 38 applies a force to the taper portion 221 in a direction perpendicular to the die mounting surface (leftward in FIG. 1). , The taper part 22
1 is pressed against the movable-side support base 16 side, whereby the movable-side mold 14 is fixed to the movable-side support base 16.

As described above, according to this structure, the movable die 14 is set at the predetermined position on the movable support base 16, and the ball screw member is
The movable-side mold 14 can be easily attached to the movable-side support base 16 by a simple operation of activating 28, and the reverse operation can also facilitate the removal. Also,
Each claw member 38 is parallel to the mounting surface of the movable mold 14 (first
When the movable side mold 14 is set or removed while the claw member 38 is separated (the state shown by the solid line in FIG. 1), the movable side mold 14 is moved toward and away from the movable side mold 14 by moving in the vertical direction (in the figure). Moreover, the claw member 38 does not get in the way.

Moreover, as shown in this embodiment, the claw members 38 are arranged vertically symmetrically with respect to the mounting position of the movable mold 14, and the hydraulic motor 42, which is a single drive source, drives them in opposite directions. If the molds are driven simultaneously in one direction, the movable mold 14
Even if is not set to a strictly accurate position, the movable side mold 14 is automatically fixed to a predetermined mounting position by being sandwiched by the upper and lower claw members 38 from both sides.

It should be noted that the present invention is not limited to such an embodiment, and the following aspects can be taken as an example.

(1) In the above embodiment, the present invention is applied to the fixing structure of the movable mold 14 as an example, but the invention can be similarly applied to the fixing of the fixed mold.

(2) The moving direction of each fixing member may be a direction substantially parallel to the mounting surface of the mold. For example, in the mold of the above-described embodiment, the claw member 38 in the left-right direction of FIGS. May be moved. Further, a plurality of fixing members may be brought close to the mold from both the upper and lower directions and the left and right directions.

(3) After driving each fixing member, the operator may manually stop the driving while visually checking the timing to stop the driving. Alternatively, the driving means may be provided with a load detecting means. The driving may be automatically stopped at the time when the load fluctuation at the time of contact between the fixing member and the mold is confirmed based on the detection signal of 1.

(4) As for the shape of the fixing member, any shape may be used as long as the die is pressed against the die support base while being in contact with the die. For example, a recess may be provided at an appropriate position of the mold, and the mold may be fixed by fitting a claw-shaped fixing member into this recess.

[Effect of device]

As described above, in the present invention, the mold can be easily fixed by a simple operation of setting the mold at an appropriate position and moving the fixing member toward the mold by the driving means. Moreover, since a pair of fixing members are arranged at positions symmetrical with respect to the mounting position of the mold and these fixing members are moved in opposite directions by rotation of a single feed screw shaft, it is easy and With a compact structure, regardless of the size of the mold, by sandwiching the mold from opposite directions by the fixing member, there is an effect that the mold can be automatically fixed at a predetermined position.

[Brief description of drawings]

1 is a sectional side view showing a mold fixing structure according to an embodiment of the present invention, FIG. 2 (a) is a partial sectional plan view showing the same structure, and FIG. 2 (b) is a sectional view showing the same structure. Partial sectional front view, third
The figure is a side view showing a resin molding apparatus having the same structure. 14 …… Movable side mold, 16 …… Movable side support (mold support), 28 …… Ball screw member (feed screw member), 281…
… Male thread, 34 …… Clamping member (fixing member), 38 ……
Claw member, 381 ... protrusion, 42 ... hydraulic motor (driving means).

Claims (1)

[Scope of utility model registration request] 1. A mold supporting base and a mold supporting base which are attached to the mold supporting base so as to be able to come into contact with and separate from the mold mounting position in a direction substantially parallel to a mold mounting surface, and which is in contact with the mold. In a mold fixing structure comprising a pair of fixing members having a shape for pressing a mold onto the mold mounting surface of the mold supporting base, the mold supporting base of the mold supporting base is oriented substantially parallel to the mold mounting surface. A single feed screw shaft that is rotatably supported inside and has male screw portions that are different in spiral direction from each other is formed on both sides, and drive means that rotationally drives this feed screw shaft. With a shape that extends in the direction orthogonal to the axial direction of the feed screw shaft,
These fixing members are screwed into the male screw portions of the feed screw shaft at positions symmetrical with respect to the axial direction of the feed screw shaft about the mounting position of the mold, so that both the screws are rotated along with the rotation of the feed screw shaft. A fixing structure for a mold, wherein the fixing members are configured to move simultaneously in a direction in which they approach and separate from each other.