JPS60201925A - Die for extrusion molding - Google Patents

Abstract

PURPOSE:To execute uniform water addition/dehydration and heating/cooling by facing a jacket consisting of a porous metallic material having open cells to a blank path under the state of pressing and mounting an external duct reaching to the jacket. CONSTITUTION:When plastics or a food blank material or the like pressure-forwarded by a screw 2 reaches to a blank path 4a for a die 3 and a fluid is stored in a circumferential groove 4e through a duct 6, the fluid is added uniformly while the pressing supply blank material is moved because open cells in a jacket 4d consisting of a porous metallic material function as capillaries, and the pressing supply blank material is extrusion molded at predetermined expansion ratio and extrusion temperature. Not only water but also the aqueous solutions, gases, etc. of each admixture are used as the fluid, and uniform dehydration to the supply blank material is enabled when the duct 6 is connected to a suction pump and uniform and rapid heating or cooling is enabled when a heating or cooling medium is circulated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an extrusion molding die that is attached to the tip of an extruder or the like.

(Prior art) The feed material, such as food material, is mixed under pressure at a predetermined temperature by the rotation of the screw of an extruder.In order to stabilize the properties of the extruded product, it is necessary to control the expansion ratio and It is necessary to control the extrusion temperature.''0 Conventionally, the expansion ratio was controlled by adding liquid additives through pores (hydration), and the extrusion temperature was controlled by adding a liquid additive through the pores. In this case, the gou adapter was made long to lower the temperature, and when the screw side was low temperature, a heater installed inside the gou was used to heat it.

However, according to such conventional techniques, the addition of water tends to cause unevenness in places, and temperature control is also uneven, which hinders the improvement of the quality of extrusion molded products.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and is an extrusion molding die that can uniformly add water, dehydrate, heat and cool the feed material extruded into the goo part. The purpose is to provide

(Structure of the Invention) In order to achieve the above object, the structure of the present invention is to use a porous metal material having open cells in an extrusion molding die that extrudes the supplied material from the monthly passage under pressure. The constructed jacket faces the material passage, and a pipe line leading to the external jacket is provided.

[Explanation of Examples]

Next, an example of an extrusion molding die according to the present invention will be described.

FIG. 1 is a partial vertical sectional view showing a first embodiment of an extrusion molding die according to the present invention attached to the tip of an extruder.

In the figure, 1 is a cylinder of an extruder, and a material passage 1a is formed inside the cylinder. 2 is a screw υ fitted into the material passage la and having fins 2a, which is rotated by a drive motor (not shown) and processes the supplied material (plastic, food, etc.) supplied through a hopper (not shown). Pressure knead and extrude into die 3.

The die 3 is composed of a die 4 and a die adapter 5, and the die adapter 5 is attached to the tip of the cylinder 1 of the extruder. The die adapter 5 has a material passage 5a located off the material passage 1aK of the cylinder 1, and the die 4 also has a material passage 4a connected to this material passage 5a. 4b is a holding plate, and 4C is a tightening bolt.

The die 4 has a jacket 4d having a U-shaped cross section,
This is facing the material passage 4a. The die 4 is integrally formed of a porous metal material having open cells (for example, foamed metal (aluminum metal, etc.), sintered metal). A circumferential groove 4e is defined around the jacket 4d, and a pipe line 6 communicating with the circumferential groove 4e is inserted from the outside.

The operation of this embodiment will be explained below. When fluid is currently being supplied to the pipe line 6 in the direction of the first arrow shown in the figure, the fluid is stored in the circumferential groove 4e, and the flow of the pipe 4d is continuous. As a result of the bubbles functioning as microtubules, the supplied material press-fitted into the material passages 5a, 4a of the die 3 is moved and fluid is added uniformly, thereby extrusion molding is carried out at a predetermined expansion ratio and extrusion temperature. It is done. Note that the fluid mentioned above is not only water, but also an aqueous solution containing various additives,
By using a heating or cooling medium, gas, etc., it is possible to appropriately control the expansion ratio and extrusion temperature for various feed materials.

FIG. 2(a) is a partial vertical cross-sectional view showing the second embodiment of the extrusion molding die according to the present invention attached to the tip of an extruder, and FIG. It is a sectional view taken along the line bb of a). Note that the same parts as those shown in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

The diamond of the second embodiment is an extrusion molded product having an irregular cross section, and the jacket 8 has a circumferential groove 8a for storing fluid from the pipe line 6, and a chevron portion 7b protruding in the radial direction of the center. are integrally formed. Furthermore, a support portion 7C fitted between the chevron portions 7b and 7b is integrally formed inside the diamond.

The fluid injected from the pipe line 6 flows through the jacket 8 through the circumferential groove 8a.
Water is gradually and uniformly oozed out to the supplied material that the jacket 8 contacts through the open cells of the water, thereby adding water.

In this way, the fluid can be added to the feed stock in a part of the die that is separate from the extruder body, which is especially effective against the addition of highly sticky aqueous solutions, such as starch syrup or honey, which may reduce the crosstalk effect. It is suitable for adding temperature-sensitive and unstable substances such as minerals, vitamins, and bacteria.

Although each of the above embodiments has specifically described the case of adding water, by connecting a suction pump to the pipe line 6, it is possible to uniformly remove the supplied material. By supplying water and additional conduits to circulate the heating or cooling medium, even and rapid heating or cooling of the feed material can be achieved.

〔Effect of the invention〕

As explained above, the extrusion molding die according to the present invention is
A jacket made of porous metal material with open cells is placed facing the ice material passage, and the jacket is made of a porous metal material with open cells, and is
Since it is characterized by the provision of a conduit leading to K, it has the following effects.

■ Water can be added and dehydrated uniformly to the supplied material at the die part.

■ The temperature of the feed material can be easily controlled at the die section.

■ In addition to ■ and ■ above, the quality of extrusion molded products can be improved.

[Brief explanation of the drawing]

Figure 1 shows the first part of the extrusion molding die according to the present invention 11JIIK.
FIG. 2(a) is a partial longitudinal cross-sectional view showing a state in which the embodiment is attached to the tip of an extruder, and FIG. FIG. 2(b) is a partial longitudinal sectional view showing the round state, and FIG. 2(b) is a sectional view taken along the line bb of FIG. 2(a). 1...Cylinder 1a*4a, 5a, 7a of screw extruder...Material passage 2...Screw 2a...Fin 3...Dice 4.7...Die 5...Adapter 4d, 8... Jacket 4e, 7a... Circumferential groove 6... Pipe patent applicant Ikegai Iron Works Co., Ltd. Kowa Kogyo Co., Ltd. 1st station Fig. 2 (0) Fig. 2 (b)

Claims (1)

[Claims] The supplied material is extruded from a material passage into an extrusion molding die under pressure, and a jacket made of a porous metal material having open cells is made to face the material passage, and an external part of the jacket is An extrusion molding die characterized by being provided with a conduit leading to.