JPS62273819A - Apparatus for automatic exchange of mold - Google Patents

Abstract

PURPOSE:To devise the raise of workability of arrangements for exchanging molds and operating efficiency, by setting up the system for exchanging molds provided with a clamping system for clamping a mold fitted on an extrusion head, and a system for locking this clamp, and a system for drawing the mold fitted on the extrusion head. CONSTITUTION:When a preform die 4 is dismantled from an extrusion head itself 1 after completing extrusion operation, a preform die 4 to be exchanged is set up at one station 26a of the system for exchanging molds 30, and another station 26b is maintained to be in empty state and span to the side of the extru sion head itself 1. Thereafter a pin 43 for weight supporting at the clamp system 40 and a pin 45 for locking at the locking system 50 are engaged with respective connecting holes 42, 44 of the preform die 4. Then the rod 62 of a oil-pressure cylinder 61 is extendingly worked and pressed against the extrusion head itself, and draws out with counterforce the preform die 4 sticking to the extrusion head itself 1.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mold changing device for extruding thermoplastic materials, and more specifically to a mold changing device for extruding a thermoplastic material. This invention relates to an automatic mold changing device that improves setup workability.

[Prior art]

In recent years, molds for extruding thermoplastic materials, especially molds for multiple extrusion, have tended to become larger and heavier.
The work of manually attaching and detaching such molds, that is, the work of replacing the molds, is a laborious and dangerous work.

Furthermore, even if a lifting device such as a hoist is used instead of manual labor, a special jig is required to attach and detach the mold, and the work efficiency is also poor. The problem was that it required a lot of effort and time.

In addition, when pulling out the mold from the extrusion head after extrusion work, it is necessary to pull the mold manually or rotate the extruder slightly to extrude the mold together with the extruded material, and then remove the mold from the extrusion head side. It is necessary to cut the mold material, and in any case, the conventional mold replacement work is extremely inefficient and inefficient.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to be able to easily and quickly replace the mold without manual intervention, and to An object of the present invention is to provide an automatic mold exchange device that can perform mold exchange safely and reliably, and can significantly improve the setup workability and operation rate of mold exchange.

[Structure of the invention]

In order to achieve the above object, this invention has a mold exchange mechanism equipped with at least one or more stations at the tip of an arm that is rotatably provided and can be raised and lowered with respect to a support installed near the extrusion head. is rotatably provided, and the mold exchange mechanism includes a clamp mechanism for clamping the mold mounted on the extrusion head, a mechanism for locking the clamp mechanism, and a mechanism for pulling out the mold mounted on the extrusion head. The main point is that it consists of the following.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 is a front view of the extruder head, FIG. 2 is a longitudinal side view of FIG. An automatic mold changer is installed.

At the tip of the nozzle 2 of the extrusion head main body 1 of the extruder head, a preform die 4 is removably installed via a fixing device 3.

The fixing device 3 is composed of presser cylinders 5 provided on both sides of the extrusion head main body 1, and the preform die 4 (mold 4
) is fixed by pressing both sides. Furthermore, a die holder 8 having a concave cross section is rotatably provided in the extrusion head main body l, into which a molding die 7 is set via an opening/closing mechanism 6.

Reference numeral 9 denotes a presser claw, and by extending the lower clamp cylinder lO fixed to the upper and lower side surfaces of the extrusion head main body 1, the tapered surface 9a of the presser claw 9 presses the rear side 8a of the die holder 8. preform die 4
It is fixed by pressing it to the side.

Next, the automatic mold changing device will be explained. This automatic mold changing device has a support 20 installed near the extrusion head main body 1.
is installed, and a drive motor 21.0 is installed on this column 2.0. The base end of the arm 23 is rotatable via the guide rod 22,
And it is supported so that it can be raised and lowered.

A swing arm 25 is rotatably supported at the tip of the arm 23 with a swing center axis 24 as a fulcrum, and two stations 26a and 26b are installed at both ends of the swing arm 25.
A mold exchange mechanism 30 is provided.

The mold exchange mechanism 30 includes a clamp mechanism 40 that clamps the preform die 4 mounted on the extrusion head main body 1, a mechanism 50 that locks this clamp mechanism 40, and a mold exchange mechanism 30 that clamps the preform die 4 mounted on the extrusion head main body 1. It is composed of a mechanism 60 for pulling out the home die 4.

A clamp mechanism 40 that clamps the pre-Bohm die 4
And the mechanism 50 that locks this clamp mechanism 40 is,
As shown in FIGS. 4 and 5, a plate 41 parallel to the preform die 4 is attached to the rotating arm 25, and a plate 41 formed on the front side wall of the preform die 4 is attached to the front surface of this plate 41. Weight-supporting pins 43 that fit into the two engagement holes 42 are provided to protrude from each other.

Further, on both sides of the plate 41, there are locking pins 4 that engage with retaining holes 44 formed on both side walls of the preform die 4.
5 are provided respectively.

The locking pin 45 is supported at the tip of an arm 47 that can pivot about a pin 46, and this arm 47 is connected via a link 48 to a handle 49 for opening/closing operation supported on an eccentric shaft. There is.

Therefore, by rotating the opening/closing handle 49 in the direction of the arrow, the link 48. The locking pin 45 rotates in the direction of the arrow via the arm 47, and the preform die 4
Both side walls can be locked and unlocked.

Next, a mechanism 60 for pulling out the preform die 4 attached to the extrusion head main body l has a hydraulic cylinder 61 fixed to the side wall of the plate 41.
The tip of the first rod 62 faces the extrusion head main body 1 side.

Therefore, the clamp mechanism 40 and this clamp mechanism 4
When pulling out the preform die 4 from the extrusion head main body 1 with the preform die 4 clamped by the mechanism 50 that locks 0, the rod 62 of the hydraulic cylinder 61
The preform die 4, which is in close contact with the extrusion head body 1, is pulled out and removed by the reaction force.

Next, to explain the operation, first, after the extrusion work is completed, the preform die 4 (mold 4) is moved to the extrusion head main body 1.
When removing the die from the extrusion head, the preform die 4 to be replaced is set in one station 26a of the mold exchange mechanism 30, the other station 26b is left empty, and the die is rotated toward the extrusion head main body 1 side. As described above, the weight supporting pin 43 and locking pin 45 of the clamping mechanism 40 and the locking mechanism 50 are engaged with the respective engagement holes 42 and 44 of the preform die 4.

Then, the rod 62 of the hydraulic cylinder 61 is extended and pushed against the extrusion head main body 1, and the reaction force pulls out the preform die 4 that is in close contact with the extrusion head □ main body 1, and in this state, proceed to extrusion. 1, and then rotated 1000 times to insert a new preform die 4 into the extrusion head body 1 again.

By performing such an operation, the replacement work, which was conventionally performed manually, can be performed automatically and safely, and the workability of changing the preform die 4 can be improved.

〔Effect of the invention〕

This invention provides a rotating mold exchange mechanism equipped with at least one station at the tip of an arm that is movable up and down and rotatable relative to a support installed near the extrusion head as described above. The mold exchange mechanism includes a clamp mechanism for clamping the mold mounted on the extrusion head, a mechanism for locking the clamp mechanism, and a mechanism for pulling out the mold mounted on the extrusion head. Because of this structure, the following excellent effects can be achieved.

(1) Not only is it easy to replace a heavy mold, it also shortens the mold replacement time, which improves the efficiency of mold replacement during extrusion work. .

(2) Replacement work can be performed more safely and reliably than conventional methods such as manual work or lifting equipment.

(3) By shortening the time required for changing molds, deterioration of the material inside the extrusion head body can be prevented, and the operating rate can be improved.

(4) Perform mold maintenance and cleaning steps in advance,
Since this can be done after the fact, work efficiency is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an extruder head implementing this invention;
Fig. 2 is a longitudinal side view of Fig. 1, Fig. 3 is a front view of the mold changing device, Fig. 4 is a plan view of Fig. 3, and Fig. 5 shows the mold clamping mechanism, locking mechanism, and metal mold. FIG. 6 is an enlarged plan view of the mechanism for pulling out the mold, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a side view of FIG. 5. l... Extrusion head main body, 3... Fixing device, 4...
・Preform die (mold), 20... Support, 23.
...Arm, 26a, 26b...Station, 30
... Mold exchange mechanism, 40... Clamp mechanism, 50.
... Mechanism to lock, 60... Mechanism to pull out.

Claims (1)

[Claims] A mold exchange mechanism equipped with at least one station is rotatably provided at the tip of an arm that is movable up and down and rotatable with respect to a support installed near the extrusion head, and the mold exchange mechanism is rotatably provided. A metal mold characterized in that the mechanism is composed of a clamp mechanism for clamping a mold attached to an extrusion head, a mechanism for locking the clamp mechanism, and a mechanism for pulling out the mold attached to the extrusion head. Automatic mold changing device.