JPS6265672A - Head apparatus of food-processing extruder - Google Patents

Abstract

PURPOSE:To eliminate the troubles in the flow of molding material occuring at the conventional breaker plate such as nonuniform flow, stagnation, temperature unevenness, etc., by inserting a straightening mechanism having a particular structure between the die and the tip of a cylinder containing a screw. CONSTITUTION:A straightening mechanism 6 is inserted between the die 4 and the tip of a cylinder 2 containing a screw 3. The straightening mechanism is composed of the casing 20 and a core part 21 consisting of the front cone head 25 and the rear cone head 26 tapered at both ends and inserted into said casing 20. An annular channel group 32 consisting of a number of channels 34 arranged concentrically to the body part 24 is formed between the body part 24 and the casing 20 and between the front and rear cone heads 25, 26 of the core part 21. A back-tapered conical channel 33 is formed between the rear cone head 26 and the casing 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an extruder head device mainly used for food processing.

(Prior art) For example, a die (or similar mechanism) is installed at the tip of a cylinder surrounding one or two screws as a device for pressurizing foods such as pet food, feed, and food such as food. ) There are l-screw or twin-screw extruders configured with a

The head device of this extruder is configured to include a breaker plate as a rectifying structure in addition to the die, so that the material pushed from the cylinder is extruded from the die while being rectified.

(Problems to be Solved by the Invention) In the conventional head device described above, material flow holes are formed on almost the entire surface of the breaker plate, and fibrous rectification is performed, but when the fluidity of the material *21 is poor. In this case, the flow may concentrate only in a part of the breaker plate, especially in the center, causing problems such as uneven flow of the work material, stagnation, and temperature unevenness.

(Means for Solving the Problems) The present invention provides a center portion having a body portion and front and rear conical heads on the front and rear sides of the body portion inside the rectifying structure disposed between the cylinder and the die. An annular group hole channel is formed between the body of the body and the outer periphery of the flow straightening structure, and a tapered conical channel is formed between the rear conical head and the outer periphery, and the material 1'l is connected to the front conical On. The problems of the prior art described above can be solved by uniformly dispersing the flow around the periphery to form an annular flow, dividing this annular flow into eleven or more, and then returning it to the annular flow.

That is, the specific configuration of the problem-solving means of the present invention is characterized by an extruder for food processing in which a rectifying structure 6 is disposed between a die 4 and the tip of a cylinder 2 that rotatably surrounds a screw 3. In the Henoding device, the rectifying structure 6 has an outer peripheral portion 2 disposed between the cylinder 2 and the die 4.
0, and a central portion 21 formed inside this outer circumferential portion 20 and having a front conical head 25 and a rear conical head 26 with tapered tips in the front and rear, and the front and rear of the central portion 2I. An annular group hole channel 32 in which a large number of holes are arranged in an annular manner concentrically with the body part 24 is formed between the peripheral part 24 and the outer peripheral part 20 between the rear conical heads 25 and 26. Outer periphery 20
A conical flow path 33 tapering backward is formed between the two.

(Function) The processed material pushed out from the cylinder 2 to the rectifying structure 6 by the screw 3 is prevented from being concentrated in the center by the front cone W425 of the central part 21, and is almost uniformly dispersed to the periphery to form an annular group hole flow. Flows into road 32. The material that has flowed into the annular group hole channel 32 is separated into the holes 34, and is subjected to flow resistance of the holes 34 to be rectified and oriented. The material that has passed through the grouping 34 enters the conical flow path 33 as if it were fibers arranged in a ring shape, and since this cone flow path 33 is tapered, the fibrous materials merge so that the ring shape is reduced. , and exits from the die 4 while being further rectified and oriented while increasing its speed.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIG. 1.2, an extruder 1 has two screws 3 rotatably built into a cylinder 2 whose inner circumferential wall of the bore has an approximately figure-eight cross section. A flow path forming member 5 and a rectifying structure 6 are arranged between them.

Reference numeral 8 denotes an adapter body bolted to the tip of the cylinder 2, into which a flow path forming part +A5 (head adapter) is inserted so as to be slidable in the axial direction of the screw. Eye 0 is adapter body 8
The axial position of the flow path forming member 5 is set by the screw thread ζ.

Inside the channel forming member 5, there are individual channels 12 concentric with the two screws 3, a conical hole 13 formed at the screw side end of each individual channel 12, and a conical hole 13 formed on the downstream side of both individual channels 12. A reservoir 14 is formed as a common part.

Each of the conical holes 13 has a shape that matches the conical tip 3a of the screw 3 protruding from the cylinder 2, and the maximum inner i on the upstream side is approximately equal to the inner i of the hole of the cylinder 2 surrounding the screw 3. They are formed in such a way that the material extruded by the screw 3 flows smoothly into the individual channels 12 . This conical hole 13 has a conical tip 3a and a gap 15.
The gap 15 forms a conical tubular flow path. The gap 15 can be arbitrarily adjusted in size by adjusting the position of the flow path forming member 5 in the screw axis direction using the hole 0, thereby adjusting the pressure in the cylinder 2, the degree of kneading, and the distance between the tip 3a and the conical tip. It becomes possible to adjust the shearing force between the holes 13 and the holes 13.

The reservoir part 14 is a space with a circular cross section, and has a perfusion prevention protrusion 16 that protrudes from between the two individual flow paths 12 in a tip shape toward the downstream side, and is narrowed by the two conical holes 13 so that the individual flow paths 12 are The materials that have come down the flow path 12 join together while decreasing the pressure.

The flow regulating structure 6 on the downstream side of the flow path forming member 5 has an outer peripheral portion 20
and a central portion 21 integrally molded therein. The outer peripheral portion 20 includes a straight cylindrical first block 22 and a second block 2 having a rear (downstream side) tapered conical hole 23a.
The first and second blocks 22 and 23 are fixed to the channel forming member 5, and the die 4 is fixed to the second block 23.

The central portion 21 has a straight cylindrical body portion 24 with a front cone tliJI 25 having a tapered tip and a rear conical head 2 at the front and rear portions thereof.
6 are integrally formed.

The insides of the outer peripheral part 20 and the central part 21 are hollow and communicate with the outside through passages 29a and 29h,
A temperature adjustment section 28 is formed in which a heat medium (a medium that can be heated and cooled) can be circulated and supplied, and the temperature of the material can be adjusted arbitrarily and uniformly throughout the inside. This temperature adjustment section 2
8 may be constituted by an electric heating means (or a heating means using a heating medium in combination with the electric heating means), and the outer peripheral part 20 and the central part 2
It is sufficient if at least one of 1. However, if heating means are provided at both parts 20 and 21 as in the embodiment, the temperature can be adjusted from the inside and outside of the material at the same time, and the temperature of the material 11 can be uniformly, quickly, and finely adjusted, making it possible to achieve even higher temperatures. It becomes possible to obtain quality products.

The front circle 8HJI25 of the central part 21 is the first block 22.
protrudes further forward and is located within the flow path forming member 5,
A dispersion flow path 31 whose cross-sectional area gradually decreases is formed between the flow path forming member 5 and the flow path forming member 5 . An annular group hole channel 32 is formed between the body portion 24 of the central portion 21 and the outer peripheral portion 20 of the first block 22. This annular group hole flow path 32 has a large number of holes 34 parallel to the axis of the body 24 arranged in an annular manner at substantially equal intervals in the circumferential direction, and the material yI-1 flowing from the annular dispersion flow path 31 flows into the canning 34 almost evenly.

The vertical holes 34 are not limited to one row as shown in FIG.
As shown in the figure, the holes may be formed in two or more rows, and the diameter and number of holes can be variously selected. Further, the flesh between the vertical holes 34 becomes a spider part 35 and the outer peripheral part 20
Although the outer peripheral part 20 and the central part 21 can be integrally molded by connecting them, it is also possible to form the outer peripheral part 20 and the central part 21 separately and fit a ring member with a vertical hole 34 between them. can.

The rear conical head 26 and the conical hole 23a of the second block 23 of the outer peripheral part 20 face each other to form a tapered conical channel 33, and the channels 3], 32, and 33 communicate with each other.
The rear end of the conical flow path 33 is converged into an l hole and communicates with the die 4. The gap 36 of the conical flow path 33 is formed so as to become gradually narrower along the entire length or toward the downstream side.

The material extruded from the cylinder 2 is transferred to the flow path forming member 5
After being compressed and sheared at , it is supplied into the rectifying structure 6 . The material entering this rectifying structure 6 is the front cone 0n25
The central flow of the flow is blocked by this, the flow is dispersed to the periphery, becomes uniform, and flows into the hole 34 of the annular vertical channel 32. This annular group hole flow path 32 is a narrow annular orifice compared to the l-flow, and the material 11 flows in the form of many fibers (round rods), and flows from the wall surface of the hole 34 separately to I11. In response to resistance, a viscous fluid-like flow velocity distribution is generated to generate shearing force and pressure, and orientation along the flow direction, organization through fiberization (a state in which the orientation is fixed), and property improvement are performed.

The material that has passed through the annular group hole flow path 32 enters the conical flow path 33 without any turbulence or stagnation in the expanded flow path, resulting in a contracted flow in which streamlines in an annular arrangement converge centripetally. Become.

In this circle & full & path 33, the rectifying action such as organization and +21 shape improvement continues, and since the material becomes a trickle, the flow velocity and pressure increase, and the orientation is further pushed forward.

After passing through the conical flow path 33iffi, the material becomes a single fiber bundle and enters the die 4 in an almost completely rectified state, where the oriented structure is fixed and the desired shape is formed. It is received and pushed out.

The product processed in this manner has a fibrous structure with a uniform cross section, and has a good texture.

In FIG. 1, 46 and 47 indicate the heater l' heater, and 48 indicates the material temperature resistance, respectively.

In the first embodiment, the rectifying structure 6 may be connected to the cylinder 2 through a vertical connection or an adapter body 8 without intervening the rectifying member 5, and the outer circumferential portion 20 may be connected to the mit portion. It is also possible to form a dispersion flow path 31 by protruding to the outside of the conical head 25, or to form an external heating medium path for IIM adjustment within the second block 23 to form a temperature control section. Furthermore, when the channel forming member 5 is not provided, the rectifying structure 6 can be applied to an l-axis extruder.

FIG. 4 shows a second embodiment of the present invention, in which the rear end of the rear conical head 26 is formed not in a pointed shape but in a cylindrical shape, and a mandrel 37 is inserted into the cylindrical die 4' via a spider 38. The front end of this mandrel 37 is fixed or integrally formed with the rear conical recess 26.

This head device extrudes a pipe-shaped product from a tubular die 4', and the pipe-shaped product can be made into a sheet by making a cut at one point or more. It is also possible to flow the material 1'l into a sheet inside the die and extrude a sheet-like product.

FIG. 5.6 shows a third embodiment of the present invention, in which the first block 22 of the outer peripheral part 20, the central part 21 and the annular vertical hole channel 32 are divided into front 1 & 2 parts, so that the temperature joint part 2
8 is formed on the front 1st and 2nd stage, and can be adjusted independently.

The annular vertical hole flow path 32A on the front side has holes 34 formed in one row as in the first embodiment, but the annular vertical hole flow path 32A on the rear side has holes 34 formed in one row.
In 2t1, a plurality of (for example, four) small holes 34' are formed corresponding to the number holes 34, and the material passing through the holes 34 is further divided into smaller parts to perform stronger rectification and metering action. It is configured to obtain.

It is also possible to provide one or more intermediate walls in each cavity of the first block 22 and the central part 21 to divide only the temperature adjusting part 28 into a plurality of front and rear stages.

By configuring the temperature adjustment section 28 in multiple stages in the material flow direction, the orientation and product properties of the material flowing inside the annular vertical hole flow path 32 can be adjusted over a wider range, and the finely divided vertical hole flow path 3
By forming 2B, the material can be formed into thinner fibers, and the rectification and metering effects can be enhanced.

FIG. 7 shows a fourth embodiment of the present invention, in which the rectifying structure 6 is attached to an adapter body 8 fixed to the tip of the cylinder 2, and the adapter body 8 is provided with a flow rate adjustment mechanism 41. ing.

The flow rate adjustment mechanism 41 has an adjustment ring 43 fitted into an annular groove 42 formed in the adapter body 8.
The center of the center part 21 can be eccentrically adjusted with respect to the center of the central part 21 using three or more bolts 44.

The inner circumferential surface 43a of the adjustment ring 43 faces the outer circumferential surface 24a of the body 24 in parallel with a gap δ therebetween, and forms an annular flow path 45 immediately before the annular vertical hole flow path 32, thereby forming a flow rectifying structure. 6
constitutes part of. By pushing the adjusting ring 43 and adjusting the eccentricity, the circumferential no.
The gaps δ, δ2 at each I+7 position change, and if the gaps δ are narrowed <'4, the flow resistance increases and the material flow rate decreases.

Generally, each part of the rectifying structure 6 has manufacturing errors or assembly errors, so it takes 141 strokes to make the flow velocity completely uniform at the circumferential self-reflection position of the annular flow path 3+, 32.33. , the product is extruded from the die 4 while bending in the direction l, so by adjusting the position of the adjustment ring 43, the resistance to the flow of material Correction '4°.

(Results of the Invention) According to the present invention described in detail in λ1, the orderly structure 6 includes an outer circumferential portion 20 disposed between the cylinder 2 and the die 4, and a structure formed inside the outer circumferential portion 20. It has a central part 21 having a tapered front cone 0125 and a rear conical head 26 in the front and rear, and a body part 24 between the front and rear internal conical cones 25 and 26 of the central part 21. An annular group hole channel 3 in which a large number of holes are arranged in an annular manner concentrically with the body part 24 is provided between the outer peripheral part 20 and the body part 24.
2 is formed, and between the rear circular groove 26 and the outer peripheral part 20, a material ￥-1 with a rear tapered conical passage 33 is used with 5M1iJ125 for the front part to prevent the central construction. +L can be uniformly dispersed in the surrounding area, and since the uniformly dispersed state flows into the annular group hole channel 32, effective rectification and orientation can be performed while dividing the material into small pieces. . Further, when the material 11 flows from the annular group hole flow path 32 to the tapered conical flow path 33, the flow becomes contracted, and the flow rectification and orientation effects can be maintained or increased. Therefore, it is possible to add a good and effective rectification effect to the material without causing problems such as uneven flow, stagnation, and temperature unevenness, and it is highly structured and has a high quality with improved properties. It becomes possible to manufacture fibrous products of

Furthermore, by forming multiple stages of temperature adjustment sections 28A and 28B in at least one of the outer circumferential section 20 and the central section 21, the orientation and product properties can be adjusted over a wider range. , a more linear extruded product (can be).

[Brief explanation of drawings]

Fig. 1.2 shows the first embodiment of the present invention, Fig. 1 is a longitudinal sectional view, Fig. 2191 is a sectional view taken along the line nn of Fig. 1, and Fig. 3 is annular grouping? A sectional view showing a modified example of the Ai path, FIG. 4 is a vertical sectional view showing the main part of the second embodiment, and FIG.
FIG. 5 is a longitudinal cross-sectional view of a main part, FIG. 6 is a view taken in the direction of the ■ arrow in FIG. 5, and FIG. 7 is a longitudinal cross-sectional view of a main part of a fourth embodiment. DESCRIPTION OF SYMBOLS 1... Extruder, 2... Cylinder, 3... Screw, 4... Die, 6... Rectifying structure, 20... Outer peripheral part, 21... Center part, 24...・Body part, 25... Front conical head, 26... Rear conical head, 28... Temperature adjustment section, 31... Dispersion channel, 32... Annular group hole channel, 3
3... Conical flow path, 41... Flow rate adjustment mechanism. Patent applicant: Food Industry Extrusion Shoes Technology Research Association

Claims (1)

[Claims] 1. In a head device for a food processing extruder in which a rectifying structure 6 is disposed between a die 4 and the tip of a cylinder 2 that rotatably surrounds a screw 3, the rectifying structure 6 is An outer circumferential portion 20 disposed between the cylinder 2 and the die 4, and a central portion formed inside the outer circumferential portion 20 and having a front conical head 25 and a rear conical head 26 with tapered ends in the front and rear. 2
1, and a front and rear conical head 25 of the central portion 21.
, 26 is formed between the body part 24 and the outer circumferential part 20, there is formed an annular group hole channel 32 in which a large number of holes are arranged in an annular manner concentrically with the body part 24. A head device for an extruder for food processing, characterized in that a conical channel 33 tapering backward is formed therebetween. 2. The annular group hole channel 32 is divided into multiple stages in the material flow direction, and the downstream annular group hole channel 32B has a plurality of holes 34 corresponding to each hole 34 of the upstream annular group hole channel 32A. 2. The head device of an extruder for food processing according to claim 1, wherein the head device is formed with: . 3. In a head device for a food processing extruder in which a rectifying structure 6 is disposed between the tip of a cylinder 2 that rotatably surrounds a screw 3 and a die 4, the rectifying structure 6 is arranged between the cylinder 2 and the die 4. an outer circumferential portion 20 disposed between the outer circumferential portion 20 and a central portion 2 having a front conical head 25 and a rear conical head 26 formed inside the outer circumferential portion 20 and having tapered ends in the front and rear directions;
1, and a front and rear conical head 25 of the central portion 21.
, 26 is formed between the body part 24 and the outer circumferential part 20, there is formed an annular group hole channel 32 in which a large number of holes are arranged in an annular manner concentrically with the body part 24. A conical flow path 33 tapering backward is formed between the two, and a plurality of temperature adjustment sections 28 are formed in at least one of the outer peripheral part 20 and the central part 21 in the material flow direction. Head device for extruder for food processing. 4. In a head device for a food processing extruder in which a rectifying structure 6 is disposed between the tip of a cylinder 2 that rotatably surrounds a screw 3 and a die 4, the rectifying structure 6 is arranged between the cylinder 2 and the die 4. an outer circumferential portion 20 disposed between the outer circumferential portion 20 and a central portion 2 having a front conical head 25 and a rear conical head 26 formed inside the outer circumferential portion 20 and having tapered ends in the front and rear directions;
1, and a front and rear conical head 25 of the central portion 21.
, 26 is formed between the body part 24 and the outer circumferential part 20, there is formed an annular group hole channel 32 in which a large number of holes are arranged in an annular manner concentrically with the body part 24. A conical flow path 33 tapering backward is formed between them, and in front of the annular group hole flow path 32 of the flow straightening structure 6, there is formed a conical flow path 33 at each position in the circumferential direction of the material entering the annular group hole flow path 32. 1. A head device for an extruder for food processing, characterized in that a flow rate adjustment mechanism 41 is provided to adjust the flow resistance of the food processing extruder.