JPH0628576B2 - Food extruder die - Google Patents

Description

TECHNICAL FIELD The present invention relates to a die for a food extruder.

[Conventional technology]

Conventionally, while giving a hollow shape to food materials by an extruder,
A cylindrical die is known as a die for molding.

As shown in FIG. 4, this is composed of an inner mandrel a and an outer die b. The inner mandrel a and the outer mandrel are connected to one end of a cylinder barrel e of an extruder equipped with a raw material supply section c and equipped with a screw d. The dies b are connected by a wing-shaped support f and form an annular land. Although the land thickness and the land outer diameter have various dimensions depending on the shape of the intended product, there is no example in which the inner mandrel a is extended from the outer die b in the extrusion direction.

[Problems to be solved by the invention]

When the food material expands at the die outlet with extrusion by the extruder, the expansion also occurs in the direction perpendicular to the extrusion direction, so the cross section of the hollow inner hole of the expansion product changes depending on the expansion rate. The cross-sectional shape, that is, the hollow inner hole, tends to be distorted.

The present invention provides a die which is not affected by the degree of expansion of the hollow inner hole during extrusion molding and can be made into an expanded product having a hollow inner hole of an arbitrary shape, which is a problem. Is the solution.

[Means for solving problems]

As a result of various studies to solve the above problems, the inventors have found that the problems can be solved by completing a new die shape.

That is, in an extruder for food, a cylinder barrel having a cylindrical shape, a screw rotating in the barrel, and a die portion attached to the tip of the barrel are used, and a die in which the inner mandrel is extended in the extrusion direction is used. This is the solution to the problem. At this time, the shape of the outer die and inner mandrel of the die part,
By changing the slit width variously, it is possible to obtain puffed foods having various shapes such as a circle, a triangle, and a star, and having hollow inner holes having different thicknesses.

The extension length of the inner mandrel needs to be about 0.5 times minimum with respect to the maximum inner diameter of the outer die, and it is preferable to keep the maximum length to about 10 times. Inhibition is insufficient, and when the amount is 10 times or more, the extruded food material is cooled and the frictional resistance with the inner mandrel becomes large, which is not preferable.

[Action]

According to the die according to the present invention, when the food material extruded by the extruder causes swelling at the die outlet, the swelling inward of the hollow inner hole is prevented, so that it swells only to the outer side, The cross sectional shape is the same as the cross sectional shape of the inner mandrel. That is, the food material extruded into the atmosphere through the die outlet retains the cross-sectional shape of the inner mandrel and is cooled and solidified. It is possible to accurately and continuously extrude the foods it has.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention.
Is a cylinder barrel of a food extruder, which is composed of an outer die 4 connected to this and an inner mandrel 5 fixed to the outer die by a wing-shaped support 6.

Further, the extrusion-side opening surface of the inner mandrel is extended in the extrusion direction from the outer die extrusion-side opening surface. The distance L from the outer die extrusion opening surface to the inner mandrel extrusion opening surface is called the inner mandrel extension length.

The food material is supplied to the cylinder barrel 1 from the material supply unit 2, and is conveyed in the die direction while undergoing extrusion cooking by the screen 3 and the cylinder barrel 1. The food material extruded into the atmosphere from the die tries to cause swelling due to a sudden decrease in pressure, but the extension of the inner mandrel prevents swelling inside the hollow inner hole of the swelling product, so the extrusion direction and Swelling occurs only in the direction perpendicular to the extrusion direction and opposite to the inside of the hollow hole. The expanded product, which has released the thermal energy due to the rapid expansion, is rapidly solidified because the temperature thereof is lowered.

〔The invention's effect〕

According to the present invention, when a food material is extrusion-molded using an extruder, a new hollow food product having an arbitrary hollow inner hole shape and a comparatively smooth outer surface showing a swollen shape is produced. It has good properties and could be manufactured continuously.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, FIG. 2 is an enlarged view of a die portion thereof, FIG. 3 is a view taken along the line AA of FIG.
The figure is a cross-sectional view of a conventional die. In the figure, 1 ... Cylinder barrel 2 ... Raw material supply section 3 ... Screen 4 ... Outer die 5 ... Inner mandrel 6 ... Support.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Sachiichi Shimaoka, 4-6-16, Minami Oimazato, Higashinari-ku, Osaka, Osaka

Claims (2)

[Claims] 1. A die for an extruder having a cylindrical cylinder barrel, a screw rotating in the barrel, and a die hole attached to the tip of the barrel, wherein an inner mandrel of the die section is extended in the extrusion direction. A die for a food extruder characterized by being extended. 2. A food extruder die according to claim 1, wherein the extension length of the inner mandrel is 0.5 times or more of the maximum inner diameter of the outer die.