JPH0316094B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Application of the Invention) The present invention is used for noodle forming, in which noodle dough made by kneading raw material powder such as wheat flour with water, etc. is continuously extruded from a die hole mold to form noodle strings. Regarding the die hole type.

(Background of the Invention) In the following description, the case of spaghetti to which the present invention is typically applied will be described as a main example.

As is well known, in order to make spaghetti edible, it is necessary to boil it in boiling water, but in order to fully boil the noodles from the surface to the core, it takes 12 to 13 minutes.
It was a relatively labor-intensive process that took about a minute.

Therefore, in recent years, various methods have been devised to make it possible to boil spaghetti in a short time.Most of these methods are used to reduce the distance from the surface of the noodles to the core, such as reducing the thickness of the noodles. It has been proposed to make the noodle thinner, to make it into thin flat or perforated noodles, or to make incisions from the surface of the noodle inward (Japanese Unexamined Patent Publication No. 175459/1983).

By the way, among the above-mentioned types, in particular, when forming the noodle strings by continuously extruding the raw material dough from the die holes, the thin blades protruding inwardly into the die holes are used. There is a known method in which grooves are carved in the longitudinal direction at the same time by providing grooves in the longitudinal direction.According to the inventors of the present invention, who have formed spaghetti using this method, the following improvements have been made. It was found that there are several things that should be done.

In other words, the cross-sectional shape of the grooves carved into the spaghetti is not a linear one made of a simple thin blade, but a V-shaped groove with a wide width on the noodle surface, which is particularly effective in shortening the boiling time. Moreover, it is desirable that the depth of the carved grooves be as deep as possible without causing problems such as tearing of the noodles, preferably to about 1/2 to 2/3 of the diameter of the noodles;
In order to form such a V-shaped groove at the same time during extrusion molding, the die hole may be provided with a wedge-shaped protrusion extending in the axial direction and protruding from the circumferential surface of the die toward the center of the hole. It was found that the inner surface of the V-shaped groove of the noodle strings tends to become rough, and that such a rough surface can cause problems such as melting when boiled. .

These various points are not uniformly problematic, depending on the state of the raw material combination of the noodle dough, the extrusion conditions, and the degree of extrusion, but they must be taken into consideration in order to manufacture high-quality products with good productivity. That's a problem.

(Object of the Invention) The present invention provides a method for manufacturing noodle strings having grooves having a predetermined V-shaped cross section by extruding noodle dough through a die hole having the wedge-shaped protrusions described above. This was done for the purpose of preventing roughening of the inner surface of the shaped groove.

(Summary of the Invention) The present inventors have attempted extrusion molding of noodles using a die hole having the wedge-shaped protrusions described above. This is thought to be due to the fact that the noodle dough passing through this area is strongly affected by the wedge-shaped shape. The reason for this is based on the following knowledge. That is, the inner surface of the die hole is generally polished to a smooth, low-friction surface. This is because if the smoothness is not sufficient, a so-called rough skin condition will appear on the surface of the formed noodle strings. However, in attempts at forming using a die hole with the protrusions described above, the condition of the rough surface of the obtained noodle strings, particularly on the inside of the V-shaped groove, was a hangnail state that exceeded the level of skin roughness as described above. This is thought to be caused not only by the surface smoothness of the wedge-shaped protrusions, but also by the shape of the protrusions.

Therefore, the gist of the present invention, which was made by the present inventor to achieve the above object based on the above-mentioned knowledge, is to provide a tapered protrusion that protrudes from a part of the inner peripheral surface of the hole in the direction of the hole core. A C-shaped piece having an inner surface with a low coefficient of friction is internally fitted into a hole of a metal die holder having a diameter so that both ends of the C-shaped notch tightly engage with both sides of the base of the protrusion, It is a die hole type in which hollow passages for extruding noodle dough are defined by these C-shaped pieces and protrusions, and the protrusion portions of the protrusions into the hollow passages form an inverted V shape with respect to a plane perpendicular to the core of the hole. Noodles comprising: a wedge-shaped portion on the downstream end side of the extruded noodle; and a tapered portion that is continuous from the wedge-shaped portion to the upstream end of the protrusion and whose cross-sectional area with respect to the surface gradually decreases toward the upstream end. It is in the die hole mold for molding.

(Embodiments of the Invention and Effects thereof) Figure 1 of the drawings shows an outline of the structure of a die hole mold used for molding spaghetti formed as a typical example of the present invention. This die holder is fixedly attached to the front surface of the barrel of an extruder (not shown). The thickness of this die holder 1 may be approximately the same as that used in a general spaghetti extruder.

A large diameter hole 2 is bored through the die holder 1 in the thickness direction.
This large-diameter hole 2 has a protrusion 3 projecting from a part of the inner circumferential wall toward the hole core with a tapered tip, and further includes a sleeve-like C-shaped piece having an inner surface with a low coefficient of friction. (For example, molded products made of hard fluororesin)
4 is internally fitted into the main hole 2 with both ends of the C-shaped notch tightly engaged with both sides of the base of the protrusion 3, whereby the inner surface of the C-shaped piece 4 and the protrusion 3 A die hole 5 in the form of a hollow passage defined by the tip surface of the die hole 5 is provided. The noodle dough is pressed and fed into the die hole 5 having such a shape from the direction shown by the broken line arrow in the figure, and when it is extruded in the direction shown by the solid line in the figure, it is divided by the shape of the inner surface of the die hole 5. A noodle shape that matches the cross-sectional shape of the hollow passage is formed, and for this reason, due to the presence of the projections 3, the extruded noodle strings are formed with grooves having a V-shaped cross section along the longitudinal direction. It turns out.

The die hole 5 when molding spaghetti
The size of the protrusion 3 is usually about d = 1.5 to 2.5 mm, and the protrusion 3 provided for this has a width dimension of 0.15 d at the base in its wedge-shaped cross-sectional shape.
~0.5d, preferably 0.3d~0.4d, height 1/3d~5/
6d, preferably about 1/2d to 2/3d,
This is desirable from the viewpoint of shortening the boiling time of the product and improving the condition of the product after boiling.

If such wedge-shaped protrusions 3 are continuously provided in the same shape in the axial direction of the die hole 5, it is already known that there is a risk that the extruded noodle strings will have a roughened surface. As mentioned above, this is because if there is a right-angled end surface that obstructs the extrusion of the noodle dough, there will be a region where the noodle dough hits this and accumulates, especially at the edge of the end surface. This is thought to be due to the shearing tearing action between the dough and the flowing noodle dough. Although it is possible to eliminate the influence of such a stagnation area to a certain extent by making the die hole 5 and the wedge-shaped protrusion 3 sufficiently long in the axial direction, in reality, the effect of the die hole It is difficult to implement due to length restrictions.

Therefore, in the present invention, the wedge-shaped protrusion 3
A tapered surface 6 whose cross-sectional area gradually decreases toward the upstream side is formed at the upstream end in the noodle dough extrusion direction, thereby eliminating the area where the noodle dough accumulates and allowing the noodle dough to flow smoothly. I did it like that.

In this case, the necessary axial dimension of the tapered portion forming the tapered surface 6 of the protrusion 3, that is, the first
In the figure, the ratio of the length of the protrusion 3 to the total length in the hole core axis direction is generally 20% or more, preferably 30% or more of the protrusion total length l.
At most, the protrusion may have a tapered shape across the entire region, with the tapered portion continuing from the upstream end to the wedge shape of the downstream end surface of the protrusion.

FIGS. 2 to 5 show the tapered surface 4 described above.
This shows an example of a configuration in which a die hole 5 having a protrusion 3 formed therein is applied to a specific extruder. A large number of die holes are aligned and formed.

FIG. 2 shows a disk-shaped die holder 7 made of gunmetal that forms the mouth of the extruder in this embodiment, and each of the die hole forming regions 8 divided into four circles in the circumferential direction. Inside, a large number of large diameter holes 9 having protrusions 10 are arranged and arranged on eight concentric circumferences.

Figure 3 is an enlarged view of one large diameter hole 9 of this die holder 7, Figure A is a cross-sectional view of the surface including the hole core, and Figure B is an enlarged view of this large diameter hole 9 of the extruder. This is a diagram viewed from the inside. Note that 11 is a tapered surface formed at the end of the protrusion 10 on the inner side of the extruder, and 12 is a stepped large diameter portion for positioning a piece 13 for forming a die hole, which will be described below.

FIG. 4 shows a die hole forming piece 13 that is press-fitted into the large diameter hole 9 of the die holder 7.
In this example, a C-shaped ring portion 15 that fits into the large diameter hole 9 is integrated with the distal end side of the annular portion 14 that fits into the stepped large diameter portion 12. . Both ends of the circumferential notch portion of this C-shaped ring portion 15 are provided in a shape and size that closely contact the side surfaces of the root portion of the projection 9, and the inner surface 16 thereof forms the circumferential inner surface of the die hole. The material of the piece is
From the viewpoint of inner surface smoothness, ease of processing, etc., it is preferable to use a synthetic resin material such as a hard fluororesin, but materials coated with such an inner surface may also be used.

Figure 5 shows the C-shaped piece 1 shown in Figure 4 above.
3 is the large diameter hole 9 of the die holder 7 shown in FIG.
The die hole 17 of this example is press-fitted into the inner peripheral surface 16 of the C-shaped piece 13.
It will be understood that it is formed by the surface of the tip portion of the protrusion 10 from the die holder 7. A tapered surface 11 whose cross-sectional area gradually decreases is formed at the end of the protrusion 10 on the inside of the extruder, and a die hole having the shape shown in FIG.
This was achieved through relatively easy machining operations.

Using the die hole type with the above structure, hole diameter d =
2.5mm, the width at the base of the die hole of the wedge-shaped protrusion 10 is approximately 1.0mm (=2/5d), and the height is approximately 1.6mm (=2/5d).
3d), the length of the same wedge-shaped cross-sectional area extending inward from the edge of the extrusion opening of the die hole is approximately 3 mm, and the tapered surface 1
When extrusion molding of spaghetti was carried out with the axial length of the spaghetti being approximately 7 mm, the inner surface of the V-shaped grooves continuous in the longitudinal direction was obtained as a continuous smooth surface.

(Modifications of the invention and their effects) The present invention is not limited to the embodiments shown above; for example, as shown in FIG.
The shape of the end of the noodle dough extrusion upstream side of the protrusion 3 in the die hole 5 may be cut into a chevron-shaped tapered surface 6'. In this case, the flow of the noodle dough is
A similar effect can be obtained by guiding the water so as to separate on both sides of the pipe so that no accumulation occurs. In addition, the molding target is not limited to spaghetti,
Needless to say, the present invention can be applied in exactly the same way to an apparatus for forming the same type of noodle dough.

(Effects of the Invention) When forming V-shaped grooves in the longitudinal direction of noodles, the present invention particularly improves the roughening of the inner side of the grooves among the various requirements required due to the properties of the noodle product. This has the effect of being able to suitably deal with the problem of prevention. Furthermore, according to the configuration of the present invention, compared to a C-shaped piece, the protrusion itself is made of metal, so it is more durable, and the die hole shape can be easily regenerated and renewed by rubbing only the C-shaped piece. Yes, and its usefulness is extremely great.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIG. 1 is a perspective view showing an example of a die hole type, and FIG. 2 is a bottom view of the die hole type applied to a practical extruder.
Figures 3 to 5 show the specific structure of the die hole, and Figure 3A is a partial sectional view of the mold body, Figure 4B is a view in the direction of arrow A in Figure 4, and Figure 4I is a partial cross-sectional view of the mold body. 5A is a front view of the die hole forming piece, B is a sectional view taken along line B-B in the same figure, and FIG. 5A is a front view of the assembled die hole.
FIG. 6 is a perspective view showing another die hole type. 1: Dice holder, 2: Large diameter hole, 3: Protrusion,
4: C-shaped piece, 5: die hole, 6, 6': tapered surface, 7: die holder, 8: die hole forming area, 9: large diameter hole, 10: protrusion, 11: tapered surface, 12: stepped Large diameter part, 13: C-shaped piece,
14: Annular part, 15: C-shaped ring part, 16: Inner surface, 17: Die hole.

Claims (1)

[Claims] 1 Into the hole of the metal die holder, which has a tapered protrusion that protrudes from a part of the inner peripheral surface of the hole in the direction of the hole core,
A C-shaped piece having an inner surface with a low coefficient of friction is internally fitted so that both ends of the C-shaped notch tightly engage with both sides of the base of the protrusion, and the C-shaped piece and the protrusion are used to extrude the noodle dough. It is a die hole type in which a hollow passage is defined, and the protruding portion of the protrusion into the hollow passage is a wedge-shaped portion on the downstream end side of the noodle extrusion, which has an inverted V shape with respect to a plane perpendicular to the hole core. A die hole mold for molding noodles, comprising: a tapered portion that is continuous from the wedge-shaped portion to the upstream end of the protrusion, and whose cross-sectional area with respect to the surface gradually decreases toward the upstream end.