JPS5842423A - Apparatus for cutting molten resin - Google Patents

Abstract

PURPOSE:To obtain the titled apparatus capable of preventing a blank from being soiled or from generating cutting marks, by actuating two cutting blades at positions spaced away from a forward end surface of a nozzle and in a plane normal to the discharging direction of a molten resin. CONSTITUTION:The cutting blades 14 for cutting molten resin 13 are actuated at positions spaced away from the forward end surface B of the nozzle and in a direction normal to the movement of the molten resin. Each cutting blade 14 is equipped with a temperature detector and a heater 17, and the temperature is regulated so that the resin would not adhere to the cutting blades. Blemish due to discoloration or cutting marks are prevented from being produced.

Description

Detailed Description of the Invention The present invention involves cutting the molten resin discharged from a nozzle attached to an extruder into a rod shape or a dango shape (referred to as a μ bottom flange) and placing the blank into a mold and press forming. The present invention relates to a blank cutting device in an extrusion-press molding device.

As shown in FIG. 1, when cutting the molten resin 3 discharged from a nozzle 2 heated by a heater I, the conventional cutting device cuts the molten resin 3 in a direction perpendicular to the extrusion direction of the molten resin at the tip surface A of the nozzle 2. From there, the lino blade 4 traverses the line of movement of the molten resin 3 using an air cylinder 6 or the like to perform cutting. This method has the advantage that the edge part of the nozzle tip surface A also serves as a cutting edge, so there are seven cutting edges in one piece, but the bath melt resin 3 adheres to the nozzle tip surface A, especially around the nozzle hole 5, The adhering resin burns and becomes brown or black and adheres to the cut surface of the blank, adversely affecting the molded product.

In addition, since the cutting blade 4 comes into contact with the hot nozzle 2, it is easily heated (and the cutting edge becomes poor), and resin is also likely to adhere to it (the area around the nozzle hole 5 is increasingly contaminated with burnt resin). Further, the cut blank is extruded in the operating direction of the cutting blade 4, and a directional property is generated.

There is also a drawback that cutting marks are caused by fil resin and the like.

The present invention eliminates the above-mentioned drawbacks by providing a bath melting + (H fat cutting device) for producing blanks that eliminate stains and cut marks on the surface of molded products. That is, the f4j molten resin is cut on both sides by two cutting blades that act from 1ri angle directions with respect to the moving direction of the bath molten resin at a position separated from the nozzle tip surface so that the nozzle tip r'gIKfN molten resin adheres to the nozzle tip. This is a cutting device that cuts the resin by sandwiching it together, and is equipped with a cutting blade 11 degree leg mounting m to prevent resin from adhering to the cutting blade.

Next, one embodiment of the invention will be explained with reference to Figures 2 to 5. 11 is a nozzle with L-12 attached.

It is for discharging m-molten resin 13. Reference numeral 14 denotes a cutting blade for cutting the molten resin 13, which acts from a direction perpendicular to the moving direction of the resin 13 at a position apart from the nozzle tip B, as shown in FIG. By moving the link mechanism 15 forward and backward as shown by arrow 1, the arm 16 is moved to the fulcrum C.
is swung as shown by the center VC chain 116a, the molten (h.1 fat 1; 3) is sandwiched from both sides, and the V
It's C.

It has a pressure receiving surface 14c that receives the impact when the two blades T4a and 14b of the cutting blade 14 come together. ] 7 is a heating heater, and 18 is an intensity detection device.

Since the structure is as described above, the present invention eliminates the above-mentioned drawbacks and provides a blank that is free from stains caused by burns and cut marks.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example. Are Figures 2 and 2 an embodiment of the present invention? FIG. 2 is a front view. FIG. 3 is a section 1-1 diagram in FIG. 2. Figure 4 O1]・
... Nozzle, 13 ... Melting 1 fat, 14 ... Cutting blade,
15...Link mechanism, 16...Arm. Applicant Toshiba Machine Co., Ltd. 71 Shin 1 Illustration 2

Claims (1)

[Scope of Claims] I. Molten resin of an extrusion-press molding device that cuts the bath molten resin discharged from a nozzle attached to an extruder into rod-shaped or dango-shaped pieces, places them in a mold, and then press-forms them. In the cutting device, the molten resin discharged from the nozzle is
The #gM11 resin is cut by sandwiching the same #gM11 resin from both sides with two cutting blades placed on a surface perpendicular to the discharge direction of the molten resin at a position apart from the nozzle tip surface. molten resin cutting equipment. 2. The molten resin cutting device according to claim 1, wherein the two cutting blades have a rectangular shape with a sharp center and both narrowed portions serve as impact receiving surfaces. 3. The molten resin cutting device according to the patent and item 2, characterized in that a temperature adjustment device is attached to each of the two cutting blades.