JPH0222266Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a mold thickness adjusting device in a mold clamping mechanism provided in an injection molding machine.

[Prior art] A mold clamping plate is movably provided between a pair of fixed plates,
In a mechanism in which the ram of a mold clamping cylinder provided on one fixed plate is connected to the mold clamping plate, and the mold is clamped by the ram, the mold is attached separately to the other fixed plate and the mold clamping plate. The position of the mold clamping plate is adjusted according to the thickness of the mold.

Conventionally, various means have been used to adjust the mold thickness, but all of them involve troublesome operations and require manpower and time for adjustment.

Therefore, the inventor of the present invention was able to move the mold clamping plate using an extremely simple means, and also accurately grasp the movement position for each mold thickness, speeding up the work.
Moreover, he invented a mold thickness adjustment device (Japanese Patent Application No. 59-279153) that could be used safely.

[Problems to be solved by the invention] The device disclosed as an embodiment in the above application includes a cylindrical connecting member located between a mold clamping ram and a movable mold clamping plate, and a tip end of the connecting member. It consists of an annular holding member on the back side of the mold clamping plate that holds the part, and a fastening member fitted over the rear part of the connecting member and the annular holding member, so that the fastening member is screwed onto the annular holding member. There are still some complicated parts, such as the need for a cylindrical part for the cylindrical part, and the engagement between the gear on the outer circumference of the connecting member and the drive gear on the annular holding member side, which must be done in a hole drilled in the cylindrical part. It was hot.

[Means for solving the problem] This invention was devised to solve the above problem, and its purpose is to eliminate the need for the cylindrical part of the retaining ring at the center of the back of the mold clamping plate. Another object of the present invention is to provide a mold thickness adjusting device that allows easy attachment of the tip of the connecting tube to the mold clamping plate.

This invention for the above purpose is an annular member that is provided with a screw on the outer periphery between the gear and the chuck of the connecting tube, and tightens the rear end of the connecting tube to the mold clamping ram by reducing the diameter of the chuck. The gist is that it is achieved by screwing the

[Operation] In the above configuration, the connection tube rotates around the mold clamping ram due to the rotation of the drive gear, thereby causing the connection tube to move in the axial direction on the mold clamping ram. Since this connecting cylinder is connected to the mold clamping plate by a retaining ring, the mold clamping plate also moves forward or backward together with the connecting cylinder, and the mold thickness is adjusted there. The connecting tube is also fastened to the mold clamping ram by a fastening member screwed onto itself, transmitting pressure to both the mold clamping ram and the mold clamping plate.

Further, this invention will be explained in detail with reference to illustrated embodiments.

[Embodiment] Reference numerals 1 and 2 designate a pair of fixing plates that are placed on the machine base with a required spacing between them, and are connected to tie bars 3.

Reference numeral 4 denotes a mold clamping plate inserted through the tie bar 3 and disposed opposite to the fixed plate 2, and connected to a mold clamping ram 6 protruding from the mold clamping cylinder 5 of the fixed plate 1 via a mold thickness adjusting device 7.

8 is a fast-feeding cylinder connected to the rear end of the mold clamping ram 6; 9 is a fast-feeding ram whose rear end is fixed to the mold-clamping ram side and inserted into the fast-feeding cylinder; 10 is a mold; 11
is an injection device.

The mold thickness adjusting device 7 includes a mold clamping plate 4 and a mold clamping ram 6.
A connecting tube 12 located between the connecting tube 12 and a connecting tube 12 which is fixed concentrically with a protrusion 13 that protrudes circularly at the center of the back surface of the mold clamping plate 4 and which forms a circular groove 14 between the connecting tube 12 and the protrusion 13 . It is composed of a ring 15 and an annular member 16 that fastens the connecting cylinder 12 and the mold clamping ram 6.

The connecting tube 12 has a projecting edge 17 integrally formed on the outer periphery of the tip, and a chuck 18 is formed at the rear end by a plurality of axial grooves, and a gear 19 is provided on the outer periphery. Further, a screw 20 is provided on the outer peripheral surface between the chuck 18 and the gear 19.

This connecting tube 12 is fitted into the groove 14 by locking the projecting edge 17 to the inner side of the connecting ring 15, and is integrally connected to the mold clamping plate 4 by abutting the tip end surface against the back surface of the mold clamping plate. has been done. Further, the rear end portion formed on the chuck is connected to the mold clamping ram 6 by screwing a screw provided on the inside with a screw around the tip of the mold clamping ram 6.

The fastening member 16 is attached to the outside of the connecting tube 12 by screwing into the screw 20 of the connecting tube 12, and the tapered surface on the inside of the rear end is in contact with the tapered surface of the chuck 18.

Reference numeral 21 denotes a driving worm gear horizontally suspended above the connecting ring 15, and meshes with the gear 19 of the connecting tube 12.

In such a mold thickness adjusting device 7, the drive gear 21
The connection tube 12 can be rotated via the gear 19 by the rotation of the connecting tube 12 . Therefore, when replacing the mold 10 with a mold 10a having a different thickness as shown in FIG. 2, the mold is replaced in the mold open position, moved to the mold closed position, and then tightened. Rotate the attachment member 16 to loosen the chuck 18, and attach the connecting cylinder 1 to the mold clamping ram 6.
When the connecting tube 12 is rotated in the forward direction after the connecting tube 2 is in a free state, the connecting tube 12 is moved on the mold clamping ram 6 by the screw lead, and the mold clamping plate 4 is moved to a position where the molds touch each other. . If the clamping member 16 is rotated to reduce the diameter of the chuck 18, the mold clamping ram 6 and the connecting tube 12 are reconnected at the mold thickness adjustment position, and the mold can be clamped in that state.

[Effects of the invention] As described above, in this invention, the fastening member 16 of the chuck 18 is screwed onto the connecting tube 12, so that the connecting ring 1
The structure of the mold thickness adjustment device is simple, as there is no need for a cylindrical part for screwing the tightening member 16 on the 5 side, and the gear 19 on the connecting cylinder side and the drive gear 21 on the connecting ring side can easily mesh with each other. It has features such as reduced size and weight.

[Brief explanation of the drawing]

The drawings show one embodiment of the mold thickness adjusting device according to this invention, and FIG. 1 is a longitudinal sectional side view before mold thickness adjustment, and FIG. 2 is a longitudinal sectional side view of the main part after mold thickness adjustment. 1, 2... Fixed plate, 4... Mold clamping plate, 6... Mold clamping ram, 7... Mold thickness adjustment device, 12... Connection tube, 1
5... Connection ring, 16... Fastening member, 18... Chuck, 19... Gear, 20... Screw, 21... Drive gear.

Claims (1)

[Scope of Claim for Utility Model Registration] A connecting ring is fixed to the center of the back of a mold clamping plate provided between a pair of fixing plates on the machine base, and the connecting ring has a gear on the outer circumferential side, and a chuck at the rear end. The distal end of the connecting cylinder formed in the above is rotatably fitted, and the above gear meshes with a drive gear provided on the connecting ring side, and the mold clamping ram of the mold clamping cylinder is attached to the connecting cylinder on one of the fixed plates. In the mold thickness adjusting device in which the mold clamping plate is movably connected to the mold clamping ram by screwing together the mold clamping plate, a screw is provided on the outer peripheral side between the gear and the chuck of the connecting cylinder, and a chuck is attached to the screw. A mold thickness adjustment device in a mold clamping mechanism, which is formed by threading an annular member that reduces the diameter and clamps the rear end of a connecting cylinder to a mold clamping ram.