JPH06210699A - Composite extrusion molding device - Google Patents

Abstract

PURPOSE:To carry out the replacement of materials quickly by forming a concentrated jet head by means of a fixed box and a plurality of movable boxes incorporated removably into the fixed box, fixing extruders to respective movable boxes and installing the concentrated jet head to the fixed box. CONSTITUTION:A concentrated jet head 8 is composed of a fixed box 3, movable boxes 4, a box insert 2 and a preformer 1, and extruders 7 are fixed to a plurality of respective movable boxes 4. Respective units U1-U4 are formed by the extruders 7 and the movable boxes 4, and respective units U1-U4 are incorporated in the fixed box 3 removably. Also the preformer 1 is incorporated therein removably. The replacement of materials, therefore, can be carried out simply by replacing respective units U1-U4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite extrusion molding apparatus for supplying a plurality of materials such as rubber and resins separately and extruding them integrally.

[0002]

2. Description of the Related Art Generally, a composite extrusion molding apparatus of this type comprises a plurality of extruders and one centralized discharge head, and the conventional centralized discharge head is integrally formed.

Further, in the conventional composite extrusion molding apparatus, the extruder itself cannot be separated from or attached to the central discharge head.

[0004]

The conventional apparatus has no problem when continuously molding a large amount of the same product, but it is completely unsuitable for small-lot production of various kinds.

That is, in order to mold different products, it is necessary to replace the materials such as rubber and resin in the extruder, so that wasteful extrusion is required until one material is completely switched to the next material. A lot of waste materials are also generated. Moreover, it is necessary to stop the extrusion line for a long time.

[0006]

SUMMARY OF THE INVENTION The present invention is a composite extrusion molding apparatus having a plurality of extruders and one central discharge head, the central discharge head being a fixed box and being attached to and detached from the fixed box. A movable box that can be freely incorporated is provided, and the movable box is fixed to each of the extruders, and each extruder and the movable box are configured as a unit and detachable from the fixed box.

[0007]

Since the fixed box and the moving box are integrated, the unit consisting of the extruder and the moving box can be easily replaced by separating the two.

For example, if a spare unit is prepared in advance and the unit is replaced when the rubber is replaced, the work is completed easily and quickly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial cross-sectional view showing the essential parts of a composite extrusion molding apparatus according to the present invention. Further, FIG. 2 shows the disassembled state.

In FIGS. 1 and 2, 1 is a preformer, 2 is a box insert into which the preformer 1 is detachably fitted, 5 is a united box, and a fixed box 3 and a plurality of boxes. Moving box 4 ...

The fixed box 3 has a recess 6 in which the box insert 2 is fitted.

Reference numeral 7 denotes a plurality of extruders, and the moving boxes 4 are fixed to the discharge ends of the extruders 7 to form units U1, U2, U3 and U4 (as shown in FIG. 2). There is.

As described above, the centralized discharge head 8 is composed of the fixed box 3, the movable box 4, ..., The box insert 2, the preformer 1 and the like, and a plurality of concentrated discharge heads 8 are provided. The extruder 7 is attached.

Moreover, the box 5 is a united type,
(As shown in FIG. 2), each extruder 7 and the moving box 4 are configured as units U1, U2, ... Removable from the fixed box 3.

By the way, the moving box 4 has an inner surface shape in which the rubber and resins discharged from the extruder 7 are in the most stable state and the extrusion shape can be easily determined, and the outer surface has a tapered tip surface 9 And is attached to the rear surface of the fixed box 3 by being inserted into a tapered insertion hole 10 that is formed on the opening side of the rear surface of the fixed box 3.

The fixed box 3 has a recess 6 on the front surface side (as described above), and the insertion holes 10 ... Communicating from the rear surface side to the bottom surface of the recess 6 are formed therethrough.

The fixed box 3 functions as a reinforcement against the internal pressure generated in the moving box 4 in the state shown in FIG. That is, when the moving boxes 4 ... Are inserted into the insertion holes 10 ...
The moving box 4 receives the internal pressure of rubber or resin and tries to elastically deform in the radial direction, but receives it.

The fixed box 3 is kept at a constant temperature by hot water, a heater or other means (not shown).

Next, the box insert 2 has a recess 2a into which the preformer 1 is fitted, and a passage 11 communicating from the bottom surface to the rear surface--the side corresponding to the bottom surface of the recess 6--. The materials such as rubber and resins discharged from the tip of the moving box 4 are penetrated by the preformer 1
It is a jig to send to.

The box insert 2 is also preferably temperature-controlled (not shown).

The preformer 1 includes a plurality of extruders 7 described above.
It is a jig for distributing materials such as rubber and resins extruded from ... And sent through the respective paths of the box 5 and the box insert 2 to predetermined positions of the composite extrusion molded product. It is desirable to have the shape and structure shown.

That is, in FIGS. 1 and 2 described above, the centralized discharge head 8 in which four kinds of materials are compounded is illustrated, but in FIG. The reformer is illustrated.

As shown in FIG. 2, the preformer 1 is detachable, and a plurality of preformers 1 as shown in FIG.
It is easy to deal with various products if it is selectively used from the set.

As described above, by the preformer 1,
Combining multiple materials into required layout and required cross-sectional shape,
Composite extrudates can be made.

In the present invention, the vulcanization of the rubber material or the crosslinking reaction of the resins may be carried out in any step. For example, it may be carried out through another vulcanization / crosslinking line after being extruded by the composite extrusion molding apparatus of the present invention, or shear heat generation is carried out in each extruder 7 ... But good.

In the present invention, the extruder 7 also includes a case where a shearing heat generator is connected to the discharge end of the extruder.

In FIG. 2, U4 'represents a spare unit, in which one unit U4 which has extruded one material is stopped and pulled out from the fixed box 5, and another material is extracted. Unit U for Spare for Extruding
If 4'is attached to the fixed box 5, the feed material can be changed (rubber replacement) quickly. Of course, other units U1, U
With respect to 2 and U3 as well, a spare unit is prepared in advance, and rapid material change (rubber change) can be realized.

Although not shown in FIGS. 1 and 2, the units U1, U2, ... Are integrated (including the speed reducer and the motor), and the hydraulic cylinder or the drive motor and the ball screw are used. It is desirable to provide a reciprocating mechanism so that the spare unit can be quickly replaced.

As described above, the present invention can be said to be a suitable invention particularly for the production of various kinds in small quantities, when the feed materials are frequently changed, and when the small extruders 7 ... Are used.

[0030]

The present invention has the following significant effects with the above-mentioned structure.

With a single extrusion molding device, with high efficiency,
It is possible to make composite extrusion molded products of various shapes and materials little by little.

In particular, the units U1, U2, ... Can be replaced quickly, and the extrusion line is not stopped for a long time.

Further, since the moving box 4 is detachable from the fixed box 3, the shape of the inner surface of the box can be easily changed.

The structure around the box 5 is simplified and simplified, easy to handle, and excellent in practicality.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a sectional view for explaining a disassembled state.

FIG. 3 is a cross-sectional view showing an example of a preformer.

[Explanation of symbols]

 3 Fixed Box 4 Moving Box 7 Extruder 8 Centralized Discharge Head U Unit

Claims (1)

[Claims] 1. A composite extrusion molding apparatus comprising a plurality of extruders and one central discharge head, wherein the central discharge head comprises a fixed box and a movable box detachably incorporated in the fixed box. In addition, the composite extrusion molding apparatus is characterized in that the moving box is fixed to each of the extruders, and the extruder and the moving box are unitized to be removable from the fixed box.