JPS58370B2 - Parison stretching supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a parison stretching and feeding device that can smoothly and reliably stretch a parison and supply the stretched parison to the next process. I will explain based on this.

The parison stretching and feeding device of the present invention includes a pair of left and right vertical rods 2A, 2B supported by a frame 1, a pair of elevating members 3A, 3B guided by these vertical rods 2A, 2B, these elevating members 3A, A pair of upper and lower horizontal rods 4 connecting the 3B, a fixed chuck 5 attached to one of the elevating members 3B, and a movable chuck 6 guided by the horizontal rod 4.
, a stretching cylinder 7 provided between the fixed chuck 5 to move the movable chuck 6, cylinders 8A and 8B for lifting and lowering both lifting members 3A and 3B, and lifting and lowering of both lifting members 3A and 3B. Racks 9A, 9B integrated with the elevating members 3A, 3B provided for synchronization,
Pinions 11A, 11B and rack 9 are attached to a common shaft 10 supported by frame 1 to engage these racks 9A, 9B.
It consists of rollers 12A and 12B that come into contact with the back surfaces of rollers A and 9B.

Both the chucks 5 and 6 have the same shape, and include a main body 13, a chuck cylinder 14 attached to the main body 13,
A horizontal rod 16 attached to the piston rod 15, and a pair of left and right vertical shafts 17 supported by the main body 13 so as to be rotatable only.
A, 17B, upper links 19A, 19B connecting upper arms 18A, 18B attached to the upper ends of these vertical shafts 17A, 17B and both ends of the horizontal rod 16, and the vertical shaft 17.
A.

A pair of upper and lower members 20 are attached between the lower ends of the vertical shafts 17A and 17B to allow rotation of the vertical shafts 17A and 17B, and both vertical shafts 17A and 17
A support shaft 21 located between B and attached between both members 20,
A pair of left and right chuck claws 22A, 22B rotatably attached to the support shaft 21, lower arms 23A, 23B attached to the lower ends of the vertical shafts 17A, 17B, and the chuck claw 2
2A.

22B, and lower links 24A and 24B.

Before receiving the regular length parison 25, the movable chuck 6 approaches the fixed chuck 5 due to contraction of the stretching cylinder 7, and the cylinder 8A.

8B rises due to contraction, and the chuck claws 22A, 22B of both chucks 5, 6 are positioned on the stretching axis 26.

Furthermore, due to the contraction of the chuck cylinder 14, both chuck claws 22A are released as shown in FIG.

22B is open.

In this state, a parison 25 of a fixed length is fed onto the drawing axis 26 by an appropriate feeding device, and at this time, the crushed portions 25a formed at both ends of the parison 25 are It is located between the claws 22A and 22B.

In this state, the chuck cylinder 14 is first extended.

Then, the horizontal rod 16 moves forward to the upper links 19A, 19B and the upper arm 18A.

18B to rotate both vertical axes 17A and 17B, and this rotation causes the lower arm 23A to rotate.

23B and the lower links 24A, 24B to the chuck jaws 22A, 22B, and these chuck jaws 22A,
22B is moved closed around the support shaft 21 to clamp the crushed portion 25a as shown in FIG.

The stretching cylinder 7 holds both ends of the parison 25.
Since the movable chuck 6 moves away, the parison 25 is stretched.

After the predetermined stretching has been performed, both cylinders 8A.

8B is extended, and by lowering the elevating members 3A and 3B, the parison 25 is lowered from above the drawing axis 26 and positioned on the next process equipment, for example, the mold axis 28 of the mold 27, which is disposed below it. .

The mold 27 receives the parison 25 when it is opened, and receives it when it is closed.

After the parison 25 is passed to the mold 27, both chuck claws 22A and 22B open due to the contraction of the chuck cylinder 14, and both chucks 5 and 6 move upward due to the contraction of the cylinders 8A and 8B and are placed on the stretching axis 26. The stretching cylinder 7 is further contracted to move the movable chuck 6 toward the fixed chuck 5, thereby returning to the initial state.

According to the present invention described in the above embodiments, since the supplied fixed-length parison is received on the drawing axis, the drawing can be carried out quickly and reliably at the same time as the receiving, and the drawn parison is Since the material can be transferred to the next process by lowering both chucks, this supply can also be performed smoothly and reliably.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway plan view, FIG. 3 is a side view, and FIGS. 4 and 5 are views showing the chuck claw. The plan view shown and FIG. 6 are partially cutaway side views of the same. 3A, 3B... Lifting member, 4... Horizontal rod, 5... Fixed chuck, 6... Movable chuck, 7... Extension cylinder, 22A,
22B...Chuck jaw, 25...Parison, 26...Stretching shaft core, 27...Mold, 28...Mold shaft core.

Claims (1)

[Claims] 1 A pair of synchronously driven elevating members are connected by a horizontal rod, and a fixed chuck is provided on one elevating member side,
A movable chuck is provided that can be moved toward and away from the fixed chuck guided by the horizontal rod, and the chuck claws of both chucks are moved between a position on the stretching axis and a stretched parison passing position by raising and lowering the elevating member. A parison stretching and feeding device characterized by being configured to be movable.