JP2019154271A - Extrusion molding machine - Google Patents

Abstract

To provide an extrusion molding machine that prevents pulsation due to a screw as much as possible without being affected by the property of food product raw materials, can eject the food product raw materials from a framework hole of the die simultaneously and stably, and can manufacture the molded food superior in molding performance stably and continuously.SOLUTION: An extrusion molding machine includes a hopper unit and a transport forming unit. The transport forming unit includes a transport case provided at a lower position of the hopper unit extended along a transport direction, a screw rotatably provided by using a transport direction as an axial direction of a rotating shaft In a transport case and having helical blades around the rotating shaft, and a die having a framework hole provided at a downstream side of the transport direction of the transport case and passing food product raw materials. It is configured by forming a storage unit transported by the rotational drive of the screw and temporarily storing the food product raw materials extruded from the framework hole at the upstream side of the transport direction of the die.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an extrusion molding machine.

  Conventionally, for example, processed meat foods such as jerky and sausage formed into sticks, noodles such as udon and pasta, and pet foods formed into pellets to improve the shelf life of food and the texture when eating. For example, molded foods that have been molded into a certain shape are favored.

  As an apparatus for producing such a shaped food, it is provided with a screw arranged in a transport case and a die arranged close to the tip of the screw, for forming a minced or pasty food material into the final form of the shaped food Extruder machines have been proposed.

  According to such an extrusion molding machine, the food raw material is sent to a die at a lower position in the conveying direction while being wound around a screw rotating in the conveying case, and the food raw material is passed through a plurality of mold holes formed in the die, It is said that a molded food molded into a certain shape can be manufactured (for example, see Patent Document 1).

JP 2002-238470 A

  However, the conventional extrusion molding machine has a structure in which the screw and the die are close to each other, so that the distance between the screw blade surface of the screw tip portion and the die surface in the axial direction is along the spiral shape forming the screw blade of the screw. Because of the difference, there is a difference in bulk density between the food ingredients that exist between them, so-called screw pulsation problem that the extrusion speed and extrusion amount of the food ingredients that are molded and discharged from the die mold holes cannot be made constant Has occurred.

  Specifically, the distance between the die surface and the screw blade surface facing the die surface is longer as it goes from the screw tip side to the base end side along the spiral shape of the screw blade with respect to the die in the transport direction. Become. That is, since the screw blade surface has a spiral shape, the screw blade surface facing the die surface has a conveyance direction between the die surface and the screw blade surface facing the die surface depending on the circumferential position around the screw axis. The distance will be different.

  For this reason, among the parts of the screw blade surface facing the die surface, the food material existing between the portion relatively close to the die surface and the die surface has a relatively small bulk density and is susceptible to the pressing force by the screw. Thus, the extrusion speed from the mold hole is increased, and the extrusion amount is increased.

  On the other hand, food ingredients existing between a part relatively far from the die surface and the die surface will absorb the pressing force by the screw inadvertently, resulting in a relatively large bulk density and reduce the pressing force. The extrusion rate from the mold hole is slowed down, and the extrusion amount is reduced.

  Therefore, the extrusion speed and the extrusion amount of the food material discharged from the mold hole will appear as a large difference depending on the positional relationship between the mold hole formed in the die and the tip of the screw that rotates to drive, Variations in the length and density of molded foods have deteriorated moldability, and there has been a problem that molded foods cannot be produced stably and continuously.

  The present invention was made in view of such circumstances, and regardless of the positional relationship between the mold hole formed in the die and the tip of the screw that rotates, the pulsation by the screw is suppressed as much as possible. An object of the present invention is to provide an extrusion molding machine that can stably discharge a food material from a mold hole of a die and can stably and continuously produce a molded food having good moldability.

  In order to solve the above-described conventional problems, an extrusion molding machine according to the present invention includes: (1) a hopper unit for feeding the food raw material in an extrusion molding machine for extruding the food raw material into a fixed shape; A feed molding unit that receives the food raw material charged into the hopper and transports and forms the food raw material in a predetermined transport direction, and the transport molding unit is provided at a position below the hopper unit. A transport case extending along the transport direction, a screw provided in the transport case so as to be rotatable with the transport direction as an axial direction of a rotation shaft, and having a spiral blade around the rotation shaft, A die provided on the lower side of the transport case in the transport direction and having a mold hole through which the food material passes, and is transported by the rotational drive of the screw and pushed from the mold hole Having features the food material which is to the formation of the reservoir for temporarily reserving at the upstream side in the transport direction of the die.

The extrusion molding machine according to the present invention is also characterized by the following points.
(2) The die is constituted by a holder member that is detachably provided on the transfer case, and the holder member includes a die body portion in which the mold hole is formed, and the die body in the storage portion. And a cylindrical portion that forms a storage space for food ingredients together with the portion.
(3) The storage part has a tapered surface that expands the cylindrical part from the lower side to the upper side in the transport direction on at least a part of the inner wall surface of the cylindrical part. The extrusion molding machine according to claim 1 or 2.
(4) The mold hole is formed in the die so as to be arranged on the same straight line with at least two, and the tapered surface is expanded from the mold hole on the lower side in the transport direction. It is formed on the inner wall of the cylindrical part.
(5) A screen in which a plurality of communication holes are formed between the screw and the storage portion so as to partition the inside of the transfer case and the storage portion and to allow the inside of the transfer case and the storage portion to communicate with each other. A plate was installed.
(6) An inner knife that slides in contact with the plate surface of the screen plate and can rotate integrally with the screw is provided at a lower position in the conveying direction of the screw.
(7) An engagement portion with which the food material is engaged is formed on the inner peripheral surface of the transport case.
(8) The spiral blade of the screw is formed so that the pitch on the lower side is smaller than the pitch on the upper side in the transport direction.
(9) The rotating shaft of the screw is formed so that the diameter on the lower side is larger than the diameter on the upper side in the conveying direction.

  According to the invention of claim 1, in an extrusion molding machine for extruding a food material to form it into a fixed shape, a hopper part for introducing the food material, and the food material charged into the hopper part. And a conveyance molding part configured to convey and form the food material in a predetermined conveyance direction, and the conveyance molding part is provided at a position below the hopper and extends along the conveyance direction. And a screw having a spiral blade around the rotation shaft and provided on the lower side of the transfer case in the transfer direction. A die having a mold hole through which the food raw material passes, and the food raw material conveyed by the rotational drive of the screw and pushed out from the mold hole is transferred to the die Since the storage part that temporarily stores in the upper direction is formed, the pulsation by the screw is suppressed as much as possible regardless of the positional relationship between the die mold hole and the tip of the screw that rotates the drive, and the die mold The food raw material can be stably discharged from the holes, and there is an effect that a molded food having good moldability can be stably and continuously produced.

  That is, the food raw material charged into the hopper is conveyed from the upper side to the lower side in the conveying direction while being stirred and kneaded by the screw, and pushed into the reservoir part in front of the die so that the reservoir part is It is compressed by filling and becomes a lump of food raw material (hereinafter referred to as a food raw material lump) along the shape of the reservoir.

  The food raw material lump in the storage part is pressed with a constant pressing force together with the lump toward the die surface through the food raw material continuously supplied from the upper side in the conveying direction of the storage part from the screw.

  In other words, the storage unit eliminates the difference in bulk density of the food material between the die and the screw blade by integrating the food material to be conveyed into the food material mass so as to continue to the rear part of the food material mass. Absorbs the pulsation and eliminates the difference in pressing force caused by the rotational displacement of the phase of the screw blade relative to the die.

  That is, the storage portion functions as a clearance portion that absorbs the pulsation of the screw while eliminating the bulk density difference of the food material between the screw and the die, and the pressing force applied to the die surface can pass uniformly through the mold hole By functioning as a pressure regulating unit that regulates pressure to a suitable pressing force, and passing food ingredients through the storage part to the die mold holes, the same amount of food ingredients can be continuously and stably delivered from the die mold holes. It can be molded and discharged.

  According to a second aspect of the present invention, the die is configured by a holder member that is detachably provided in the transfer case, and the holder member is a die body portion in which the formwork hole is formed. And a cylindrical part that forms a storage space for food raw materials together with the die body part in the storage part, so that a holder member having a storage part and a die part suitable for a desired molded food is unitized. The range of selection of the unit can be expanded, and the maintenance performance can be improved by removing the holder member after use of the apparatus and cleaning or replacing the apparatus member such as the holder member, the transfer case, and the screw.

  According to the invention of claim 3, the storage portion has a tapered surface that expands the cylindrical portion from the lower side to the upper side in the transport direction on at least a part of the inner wall surface of the cylindrical portion. Therefore, by moving the food ingredient lump in the reservoir along the tapered surface to the lower side in the conveying direction, the pressing force by the screw is concentrated toward the mold hole of the die, and the mold hole A pressing force against the internal passage resistance can be obtained more effectively.

  According to a fourth aspect of the present invention, at least two mold holes are formed on the die so as to be arranged on the same straight line, and the tapered surface is lower in the transport direction. Since it is formed on the inner wall of the cylindrical portion so as to expand from the mold hole on the side, the pressing force by the screw can be more reliably concentrated on the plurality of mold holes of the die.

  According to the invention concerning Claim 5, between the said screw and the said storage part, the inside of the said conveyance case and the said storage part are partitioned off, and the inside of the said conveyance case and the said storage part are mutually connected. Since a screen plate with a plurality of communication holes is installed, it is not affected by the ingredients and properties of the food ingredients, and it prevents clogging of the mold holes due to the food ingredients and allows the food ingredients to pass through the mold holes. The resistance can be made uniform and the moldability of the molded food can be improved.

  Food raw materials have many properties such as moisture, oil, protein and fiber, and adhesive properties, binding properties, fluidity, etc. Some of the food ingredients are unevenly distributed in ingredients and properties, such as forming a lump part (hereinafter simply referred to as “dama”) bound to each other in the strong part.

  Therefore, by inserting the food material having such non-uniform components and property distribution through the communication holes of the screen plate, the food material is lined up and loosened, and the uneven distribution of the components and properties in the food material is eliminated. be able to.

  Further, according to the invention of claim 6, an inner knife that slides in contact with the plate surface of the screen plate and can rotate integrally with the screw is provided at the lower position in the conveying direction of the screw. By cutting food ingredients conveyed by screws with an inner knife, relatively hard lumps and fiber components in the ingredients can be cut and subdivided, and the distribution of properties and ingredients is made more uniform in the reservoir. To form moldable food ingredient lump, to prevent clogging of mold holes due to food ingredients, and to make the passage resistance of food ingredients passing through each mold hole more uniform, and to further improve the moldability of molded food Can do.

  According to the invention concerning Claim 7, since the engaging part with which the said foodstuff material engages was formed in the inner peripheral surface of the above-mentioned conveyance case, the foodstuff material conveyed with a screw is about the rotation direction. It is possible to prevent a co-rotation phenomenon in which the screw is fixed and rotates integrally with the screw, and a pressing force in the conveying direction by the screw can be effectively obtained.

  According to the invention according to claim 8, since the spiral blade of the screw is formed so as to have a lower pitch than the upper pitch in the conveying direction, the food material is received on the upper side of the screw. The screw receiving port is widened to receive the food material supplied from the hopper, and can be continuously conveyed to the lower side while being efficiently wound around the screw in the conveying case, regardless of the push rod, etc. In this way, the pressing force on the die can be increased by increasing the chance of contact between the spiral blade and the food material.

  According to the invention of claim 9, since the rotation shaft of the screw is formed to have a diameter on the lower side larger than the diameter on the upper side in the conveying direction, the food material from the hopper at the upper side of the screw The depth of the receiving port of the receiving screw can be lengthened, and the food material can be continuously conveyed to the lower side while being efficiently wound around the screw in the conveying case. The pressing force can be increased.

It is an external appearance perspective view which shows the structure of the extrusion molding machine concerning 1st Embodiment. It is an external appearance perspective view which shows the state which isolate | separated the hopper part and conveyance shaping | molding part of the extrusion molding machine concerning 1st Embodiment. It is a sectional side view showing the composition of the extrusion molding machine concerning a 1st embodiment. It is a disassembled perspective view which shows the structure of the conveyance molding part of the extrusion molding machine concerning 1st Embodiment. It is explanatory drawing which shows the structure of the conveyance case nozzle part of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the structure of the screw of the extrusion molding machine concerning 1st Embodiment. It is an external appearance perspective view which shows the structure of the holder member of the extrusion molding machine concerning 1st Embodiment. It is a sectional side view which shows the structure of the holder member of the extrusion molding machine concerning 1st Embodiment. It is an external appearance perspective view which shows the structure of the screen plate of the extrusion molding machine concerning 1st Embodiment. It is a sectional side view which shows the structure of the screen plate of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the structure of the rotating shaft bearing of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the structure of the inner knife of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the mounting process of the inner knife of the extrusion molding machine concerning 1st Embodiment. It is an external appearance perspective view which shows the structure of the cutting part of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the structure of the rotary cutter of the extrusion molding machine concerning 1st Embodiment. It is explanatory drawing which showed the use condition of the extrusion molding machine concerning 1st Embodiment. It is explanatory drawing which showed the use condition of the extrusion molding machine concerning 1st Embodiment. It is an external view which shows the structure of the holder member of the extrusion molding machine concerning 2nd Embodiment. It is a sectional side view which shows the structure of the holder member of the extrusion molding machine concerning 2nd Embodiment. It is a plane sectional view showing composition of a holder member of an extrusion molding machine concerning a 2nd embodiment.

  The present invention relates to an extrusion molding machine for extruding a food material to form it into a fixed shape, receiving a hopper part for introducing the food material, the food material introduced into the hopper part, A transport molding section that transports and molds in a predetermined transport direction, and the transport molding section is provided at a position below the hopper section and extends along the transport direction; and in the transport case And a screw having a spiral blade around the rotation shaft, and a lower side of the conveyance case in the conveyance direction. A die having a mold hole to be passed, and the food raw material conveyed by the rotational driving of the screw and pushed out from the mold hole is temporarily on the upper side in the conveyance direction of the die. There is provided an extrusion molding machine, characterized in that the formation of the reservoir to be reserved in the.

  The food raw material provided to this machine is not particularly limited as long as it has components and properties that can form the final form of the formed food. For example, it may be a dough obtained by adding water or a seasoning to powder made of vegetables, meat pieces or minced meat, vegetables, cereal flour or meat flour, or a mixture thereof. In addition, for example, relatively large food ingredients such as relatively large meat chunks and vegetables cut into blocks can be used in this apparatus.

  The molded food produced by this machine is not particularly limited. For example, as described above, processed meat food such as jerky and sausage, noodle food such as udon and pasta, and pet food molded into pellets. Besides, hamburger and dumpling rice cake can be processed.

  In particular, according to the present invention, meat raw materials that have been difficult to form into a desired final form continuously and stably can be formed into a processed meat food form.

  In other words, this device has a configuration that can eliminate the uneven distribution of components and properties in meat raw materials that contain a lot of components such as protein and flesh and have strong properties such as binding properties and adhesiveness. Not only can food products be molded and discharged from the frame holes at the same extrusion speed and with the same amount of extrusion to continuously produce molded foods with improved moldability, but the distribution of ingredients and properties in the molded foods can be made uniform. It can be said that this is an apparatus capable of improving the quality.

  Moreover, the number of die mold holes may be single or plural. Of course, even if there are a plurality of mold holes, it goes without saying that food raw materials can be simultaneously formed and discharged simultaneously from the mold holes at the same extrusion speed and the same extrusion amount. Moreover, the hole diameter, length, and shape of the mold hole 50 can be appropriately changed depending on the properties and components of the food raw material and the desired shape of the formed food.

  In other words, according to the present invention, according to the processing purpose for which the die is desired, that is, the purpose of food molding processing by extruding a predetermined amount while kneading and stirring the food material, and the purpose of cutting or crushing the food material finely By appropriately changing the above, it can be made to selectively function as, for example, an extruder for processed food ingredients that can be extruded in a predetermined amount with kneading and stirring, such as gyoza candy, or as a mincer that produces minced meat, for example.

[First Embodiment]
Hereinafter, an embodiment of an extrusion molding machine according to the present invention will be described in detail. FIG. 1 is an overall external view showing the configuration of an extrusion molding machine, FIG. 2 is an external view showing a state where a hopper portion and a transport molding portion are separated, FIG. FIG. 5 is a perspective view and side sectional view showing the configuration of the transfer case nozzle unit, FIG. 6 is a perspective view and side view showing the configuration of the screw, and FIGS. 7 and 8 are die holders. FIG. 9 and FIG. 10 are perspective views and side sectional views showing the configuration of the screen plate, FIG. 11 is an external view showing the configuration of the rotary shaft bearing, and FIGS. 12 and 13 are inner views. FIG. 14 and FIG. 15 are a perspective view showing a configuration of a knife and an explanatory diagram showing a mounting state, and FIGS. 14 and 15 are a perspective view showing a configuration of a cutting portion and a perspective view showing a configuration of a cutting cutter.

  As shown in FIG. 1, an extrusion molding machine A according to the present embodiment receives a hopper portion 1 for feeding a food material and a food material fed into the hopper portion 1 below the hopper portion 1, It is based on providing the conveyance shaping part 2 conveyed and shape | molded in a predetermined conveyance direction.

  The hopper unit 1 and the transfer molding unit 2 are connected to the housing unit 100 so as to be interlocked with a control unit and a driving unit built in the housing unit 100 installed on the mounting table 104.

  As shown in FIG. 3, the hopper unit 1 includes an upper and lower hopper body 10 into which a food material is charged, and an agitation paddle body 11 pivoted in the hopper body 10.

  The peripheral wall of the hopper main body 10 forms a jacket 12 constituted by inner and outer double walls as shown in FIG. 3, and the hopper 1 is cooled or circulated by circulating a heat medium such as cold water or hot water through the jacket 12. This makes it possible to prevent the temperature of food ingredients that have been added by heating.

  The stirring paddle body 11 includes a paddle rotating shaft 14 that is pivoted inside the hopper body 10 and a stirring paddle 11 a that is provided around the paddle rotating shaft 14.

  One end of the paddle rotation shaft 14 is connected to the drive unit 101 built in the housing unit 100 and the other end is brought into sliding contact with the paddle rotation bearing 15. The axial direction of the paddle rotation shaft 14 is the same as the axial direction of the rotation shaft 40 of the screw 4 included in the transport molding unit 2.

  A bearing projection 15a is formed at one end of the paddle rotation bearing 15, and a shaft recess 14a corresponding to the bearing projection 15a is formed at the other end of the paddle rotation shaft 14.

  Further, as shown in FIGS. 1 to 3, a cylindrical bearing insertion tube 17 is provided on one side of the hopper body 10 so that an opening on one end side thereof faces the hopper body 10. The bearing insertion tube 17 protrudes outward in a perpendicular manner to the wall surface on one side of the hopper body 10.

  That is, the paddle rotation bearing 15 is supported by the wall surface portion on one side of the hopper body 10 via the bearing insertion tube 17. The paddle rotation bearing 15 rotatably supports the paddle rotation shaft 14 by loosely fitting a bearing projection 15a that is projected into the hopper body 10 by being inserted into the bearing insertion tube 17 into the shaft recess 14a.

  The stirring paddle 11a has a rectangular plate shape, and is provided so that the plate surface is directed in the rotation direction of the paddle rotation shaft 14 along the axial direction with respect to the paddle rotation shaft 14 as shown in FIG. In the present embodiment, two agitation paddles 11 a and 11 a ′ are provided for the paddle rotation shaft 14.

  The two agitation paddles 11a and 11a ′ are provided at positions adjacent to each other so as not to interfere with each other in the axial direction of the paddle rotation shaft 14, and equiangular intervals (180 in the circumferential direction of the paddle rotation shaft 14). ° intervals). The two stirring paddles 11a and 11a 'push the food raw material stored in the hopper 1 into the rectangular discharge port 16 below while being alternately stirred by the plate surfaces 11b and 11b'.

  As shown in FIGS. 3 and 4, the conveyance molding unit 2 includes a conveyance case 3 that extends along the conveyance direction, and a screw 4 that is rotatably provided in the conveyance case 3 with the conveyance direction as the axial direction of the rotation shaft 40. The die 5 is provided on the lower side in the transport direction of the transport case 3 and has a plurality of mold holes 50 through which the food material passes.

  The transport case 3 is a hollow cylindrical body that extends in the horizontal direction from one side of the housing unit 100, and can be attached to and detached from the transport case main body 30 that communicates with the hopper 1 and the front end of the transport case main body 30. And a transport case nozzle part 31.

  The transport case body 30 is a portion corresponding to the rear half (portion on the upper side in the transport direction) of the transport case 3, and has a housing at one end so that the cylinder shaft is arranged on the same axis as the rotation shaft of the drive unit 103. It is fixed to one side of the body part 100.

  Further, the peripheral wall of the transport case main body 30 forms a jacket 30c constituted by inner and outer double walls as shown in FIG.

  As shown in FIGS. 2 and 4, a rectangular material carry-in window 30 a is formed in a cutout shape on the upper part of the peripheral wall of the transport case body 30, and the hopper 1 is attached to the upper part of the transport case body 30. 3, the raw material carry-in window 30 a is positioned at the discharge port 16 so that the transfer molding unit 2 and the hopper unit 1 communicate with each other, and the hopper unit 1 and the transfer case body 30 of the transfer molding unit 2 Are integrated.

  Further, as shown in FIG. 3, a resin plate 30b is formed on the outer peripheral edge of the conveyance case main body 30 on the lower side in the conveyance direction so as to protrude outward in the radial direction.

  The transport case nozzle portion 31 is a portion corresponding to the front half (portion on the lower side in the transport direction) of the transport case 3 as shown in FIGS. 3 and 4, and is a cylindrical nozzle as shown in FIG. It is composed of an integral member having a main body 31a and a hooking plate 32 formed to protrude radially outward at the outer peripheral edge on the upper side in the transport direction of the nozzle main body 31a.

  The hooking plate portion 32 has a substantially rhombus-shaped outer shape with the left-right direction as the longitudinal direction when viewed in the axial direction, and hook-like hooking claws 32a, 32a ′ are formed at both left and right ends thereof. The left and right hooking claws 32a and 32a ′ are formed point-symmetrically in the axial direction so as to form notches with the opening sides upside down with the main body portion of the hooking plate portion 32, respectively.

  Further, as shown in FIGS. 1 and 2, engaging rods 102, 102 ′ having engaging receiving portions 102 a, 102 a ′ at the distal ends are provided from the outer wall of the casing 100 on the left and right outer sides of the transport case main body 30. Projection is provided along the cylinder axis of the transport case body 30. Further, the fastening nuts 102b and 102b 'can be screwed to the tips of the hook receiving portions 102a and 102a'.

  With such a configuration, by engaging the engaging claws 32a and 32a ′ of the transport case nozzle portion 31 with the engaging rods 102 and 102 ′ and closing the fastening nuts 102b and 102b ′, the engaging plate 32 and the resin plate 30b are connected. It is possible to fasten the transfer case nozzle part 31 to the transfer case body part 30 in close contact.

  Further, a main body fitting portion 35 into which the front end of the transport case main body 30 is inserted is formed on the inner peripheral edge of the transport case nozzle portion 31 on the upper side in the transport direction. The main body fitting portion 35 is a portion whose inner diameter is increased at the open end of the conveyance case nozzle portion 31 on the upper side.

  Further, a jacket 33 having an inner / outer double wall structure is formed on the peripheral wall of the nozzle body 31 a, and the heat medium can be circulated in the same manner as the hopper 1 having the jacket 12.

  In addition, a fitting recess 36 for inserting the base end (end on the upper side in the transport direction) of the holder member 51 is formed in the inner peripheral edge of the lower end in the transport direction of the transport case nozzle part 31. At the same time, a male screw portion 37 is formed on the outer periphery of the end portion to be screwed with the female screw portion 56 of the annular joint 54.

  Moreover, as shown in FIG.5 (b), the engaging part 34 for a foodstuff material to engage is formed in most parts except the front-and-back end part of the internal peripheral surface of the conveyance case nozzle part 31. As shown in FIG.

  The engagement portion 34 is formed in the inside of the transport case nozzle portion 31 so as to have a spiral direction opposite to the spiral direction of the screw 4, that is, a spiral shape opposite to the phase formed by the spiral shape of the screw 4 in a side view. The spiral protrusion 34a is formed so as to protrude radially inward from the peripheral surface.

  The number of the engaging portions 34 is not particularly limited as long as the food material in the transport case nozzle portion 31 can be engaged. In the present embodiment, three are formed on the inner peripheral surface at a predetermined interval, and the engagement opportunities with the food raw material in the rotation direction are increased as much as possible.

  Further, the shape of the engaging portion 34 may be, for example, a linear shape along the axial direction of the rotation shaft 40, a wavy line, or a spot shape. Further, the engaging portion 34 may have a groove shape in addition to the protruding shape.

  With such a configuration, the food material conveyed to the lower side in the conveying direction of the conveying case 3 with the rotation of the screw 4 is engaged with the engaging portion 34 so as to be substantially immovable with respect to the rotating direction. It is possible to prevent co-rotation of food ingredients due to rotation.

  As shown in FIGS. 3, 6 (a) and 6 (b), the screw 4 has a rotating shaft 40 that can be attached to the drive unit 103 built in the housing unit 100, and a spiral shape around the rotating shaft 40. And a spiral blade 41 projectingly formed.

  The both ends of the rotating shaft 40 of the screw 4 have a shaft base end 40 a that can be attached to and detached from the drive unit 103, and the other end that is a shaft tip 40 b that extends slightly longer than the tip of the spiral blade 41.

  Further, a rectangular fitting nut 42 that can be fitted with an inner knife to be described later is externally fitted and fixed at a position near the tip of the spiral blade 41 of the shaft tip 40b. In an embodiment in which the inner knife is not used, the fitting nut 42 is not externally fitted to the shaft tip 40b, so that the spiral blade 41 can be extended to the shaft tip 40b accordingly.

  Moreover, the rotating shaft 40 of the screw 4 is formed so that the diameter L2 on the lower side is larger than the diameter L1 on the upper side in the transport direction, as shown in FIGS. 6 (a) and 6 (b). In other words, the diameter of the rotating shaft 40 is increased from the upper side to the lower side in the conveying direction, that is, from the shaft base end 40a to the shaft tip 40b.

  Specifically, when the screw 4 is housed and disposed in the transport case 3, the rotation of the rear half 4a, which is the portion of the screw 4 located at the discharge port 16 of the hopper 1 as shown in FIG. The diameter L1 of the shaft 40 is formed so as to be smaller than the diameter L2 of the rotating shaft 40 in the front half 4b, which is a portion surrounded by the inner peripheral wall of the transfer case 3 in the entire outer area of the screw 4.

  That is, of the screws 4 provided in the transfer case 3, the front half part is the front half part 4b and the rear part is the latter half part with respect to the front end position of the raw material carry-in window 30a of the transfer case body part 30 as a boundary. 4a, and the shaft portion of the rotating shaft 40 in the first half portion 4b is an enlarged diameter portion with respect to the shaft portion of the rotating shaft 40 in the second half portion 4a. For example, the diameter L2 of the rotating shaft 40 in the first half 4b is about 1.5 to 2 times the diameter L1 of the rotating shaft 40 in the second half 4a.

  Thus, in this embodiment, regarding the thickness of the rotating shaft 40 of the screw 4, the front side is thicker than the rear side in two stages, front and rear, and the portion where the thickness changes is the raw material loading in the front-rear direction. It is set as the site | part of the vicinity of the front-end position of the window 30a.

  In addition, as an aspect which thickens the front part with respect to the rear part of the rotating shaft 40 of the screw 4, it is not limited to this embodiment, For example, it is thick in steps with three or more steps in front and back. It is also possible to use an aspect that gradually increases in a reverse taper shape from the rear side to the front side.

  Further, the spiral blade 41 of the screw 4 is formed so that the lower pitch P2 is smaller than the upper pitch P1 in the transport direction. In other words, the pitch of the spiral blades 41 is formed so as to decrease from the upper side to the lower side in the transport direction, that is, from the shaft base end 40a to the shaft tip 40b.

  Specifically, as in the rotary shaft 40 described above, in the spiral blade 41, the pitch P <b> 1 of the spiral blade 41 in the rear half portion 4 a, which is a portion located at the discharge port 16 of the hopper portion 1, is the entire outer area of the screw 4. Is formed to be wider than the pitch P2 of the spiral blades 41 in the front half 4b, which is a portion surrounded by the inner peripheral wall of the transport case 3. For example, the pitch P2 of the spiral blade 41 in the front half 4b is about 0.25 to 0.70 times the pitch P1 of the spiral blade 41 in the rear half 4a.

  In particular, in the present embodiment, the pitches P1 of the spiral blades 41 in the second half 4a are made equal, and the pitches P2 of the spiral blades 41 in the first half 4b are gradually reduced from the upper side to the lower side in the transport direction. Yes.

  In addition, the spiral blade 41 of the screw 4 may be formed so that its lead angle gradually decreases from the upper side to the lower side in the conveying direction (from the shaft base end 40a to the shaft tip 40b).

  Specifically, in the spiral blade 41, the lead angle of the spiral blade 41 in the rear half portion 4 a, which is a portion located at the discharge port 16 of the hopper 1, is surrounded by the inner peripheral wall of the transport case 3 in the entire outer region of the screw 4. It is formed so as to be larger than the lead angle of the spiral blade 41 in the front half part 4b which is a part to be fixed. For example, the lead angle of the spiral blade 41 in the rear half 4a is about 20 °, and the lead angle of the spiral blade 41 in the front half 4b is about 10 °.

  With such a configuration, the food raw material is effectively received from the hopper portion 1 at the upper position of the screw 4 to increase the lead of the food raw material per rotation of the screw, and the density of the food raw material is increased at the lower position of the screw 4. It is possible to increase the pressing force per screw rotation.

  Further, in the screw 4, the number of spiral blades 41 formed around the rotating shaft 40 can entrain and convey the food raw material along the conveying direction and resists the internal passage resistance in the mold hole 50 of the die 5. There is no particular limitation as long as the pressing force can be generated. In addition, the spiral blade 41 of this embodiment is set to one from a viewpoint of maintenance property and economical efficiency.

  In addition, as shown in FIG. 3, the feed molding unit 2 temporarily stores food raw material that is transported by the rotational drive of the screw 4 and pushed out from the mold hole 50 of the die 5 on the upper side in the transport direction of the die 5. The storage part 6 to be formed is formed.

  In other words, the storage unit 6 includes an extension part that extends between the tip of the screw 4 and the die 5 in the transport direction, that is, the lower side of the transport case 3 than the screw 4 in the transport direction, and an end of the transport case 3, that is, the extension. This is a portion forming a storage space 6a surrounded by the die 5 disposed at the tip of the portion.

  In particular, the die 5 according to the present embodiment is configured by a holder member 51 that is detachably provided on the transport case 3 as shown in FIGS. 3, 7 (a) and 8. The die body 52 is formed with a plurality of mold holes 50 as a die plate, and the cylinder 60 is formed in the reservoir 6 together with the die body 52 to form a food raw material storage space 6a.

  That is, as shown in FIGS. 7 (a) and 7 (b), the holder member 51 unitizes the cylindrical portion 60 and the die body portion 52 to form a storage space 6a therein, and the transfer case 3, ie, the transfer The storage portion 6 is configured by being attached to the case nozzle portion 31. The holder member 51 can be attached to and detached from the transport case nozzle portion 31 and can be appropriately selected according to the shape of the desired molded food and the ingredients and properties of the food material.

  Here, as a special point of the present invention, the storage unit 6 stores and compresses the food material to be transported in the storage space 6a to form a food material lump, thereby forming a space between the screw 4 and the die 5 in the transport direction. The clearance function that absorbs the pulsation of the screw 4 while eliminating the difference in the bulk density of the food ingredients of the food, and the pressure adjustment by the screw 4 to a uniform pressing force that can pass through the plurality of mold holes 50 of the die 5 And a pressure function.

  The storage portion 6 for forming a food ingredient lump that realizes such a clearance function and a pressure regulation function is provided between the blade surface of the spiral blade 41 of the screw 4 and the plate surface of the die 5 facing this in the conveying direction. This is determined by the length of the storage space 6a in the transport direction, that is, the thickness of the food raw material lump in the transport direction.

  The length of the storage space 6a in the transport direction is substantially the same as the length of the cylinder portion 60 in the cylinder axis direction. Specifically, the distance between the virtual plane along the radial direction of the cylindrical portion 60 at the lower groove bottom position in the conveying direction of the plate fitting groove 63 of the cylindrical portion 60 and the plate surface of the die 5 facing this Become.

  The smaller the length of the storage space 6a, the more the food material extrusion speed and the amount of extrusion can be made constant without impairing the pressing force of the food material by the screw 4. On the other hand, the larger the storage space 6a, the more the pulsation of the screw 4 can be absorbed. It is preferable to be set to ~ 200 mm.

  If the length of the storage space 6a is less than 5 mm, the difference in bulk density of the food material between the screw 4 and the die 5 is not eliminated, and a food material lump having a thickness in the conveyance direction that can suppress the pulsation of the screw 4 cannot be formed. .

  In other words, when the length of the storage space 6a is smaller than 5 mm, the volume of the storage space 6a becomes relatively small, and a food raw material lump that can absorb the pulsation of the screw cannot be formed in the storage portion 6, and a plurality of molds The same and the same amount of food material cannot be stably molded and discharged from the holes 50 at the same time.

  On the other hand, if the length of the storage space 6a is larger than 200 mm, the density of the food material between the screw 4 and the die 5, that is, the thickness of the food material lump in the conveying direction becomes too large, and the pressing force is excessively reduced. The food material cannot pass through the mold hole 50 of the die 5.

  In other words, when the length of the storage space 6a is larger than 200 mm, the volume of the storage space 6a is relatively increased, and on the contrary, the volume of the food raw material lump formed in the storage portion 6 is excessively increased, and the pulsation of the screw Needless to say, the pressing force against the passage resistance of the mold hole 50 of the die 5 is also canceled out, and the production capacity is significantly reduced.

  Therefore, the reservoir 6 can surely have a clearance function and a pressure regulation function by forming the storage space 6a in the transport direction with a length of 5 mm to 20 mm.

  The shape of the storage space 6a of the storage unit 6 is not particularly limited as long as the clearance function and the pressure regulation function can be realized. For example, the storage space 6a may be any one of a cylindrical shape, a prismatic shape, and a frustum shape. In the storage portion 6 of this embodiment, the storage space 6 a is a cylindrical space formed by the cylindrical portion 60 and the die main body portion 52.

  In addition, the inner wall of the mold hole 50 is subjected to a smooth surface process to improve the slipperiness of the food material so that the food material does not inadvertently adhere to the wall surface and deteriorates the moldability at the time of extrusion. . Specifically, the inner wall surface of the mold hole 50 is smoothed with a resin made of Teflon (registered trademark). In addition, according to the property of the food raw material provided to the extrusion molding machine A, it is also possible to perform the smooth surface process similar to the mold hole 50 on the inner wall of the die body part 52 or the cylinder part 60.

  The die main body 52 is a disk having a predetermined thickness, and is configured to be detachable via screws on the lower edge of the cylindrical portion 60 in the transport direction, and is radially identical from the center of the plate surface. A plurality of large mold holes 50 are formed so as to penetrate therethrough.

  The opening peripheral part of the discharge port 53 of the mold hole 50 on the outer surface of the die body part 52 is a part where a cutter of the cutting part 9 to be described later comes into sliding contact. The dynamic cutting force is improved as much as possible.

  Further, as shown in FIGS. 7B and 8, the edge on the upper side in the conveyance direction of the cylindrical portion 60 faces the fitting convex portion 61 corresponding to the fitting concave portion 36 of the conveyance case nozzle portion 31 in the axial direction. Projecting.

  Further, as shown in FIGS. 7A and 8, a connection flange 62 is formed to protrude outward in the radial direction of the cylindrical portion 60 on the outer periphery of the end portion on the upper side in the conveying direction of the cylindrical portion 60. As shown in FIG. 4, it is possible to abut and engage with a joint flange 55 protruding radially inward from the inner peripheral edge of the annular joint 54 on the lower side in the transport direction.

  That is, the conveyance case nozzle part 31 and the holder member 51 are configured such that the fitting convex part 61 is fitted into the fitting concave part 36 with respect to the conveyance case nozzle part 31 as shown in FIG. Fastening is performed by tightening an annular joint 54 fitted to the member 51. Here, the annular joint 54 is fastened to the transport case nozzle portion 31 by screwing the female screw portion 56 with a male screw portion 37 formed on the outer peripheral side of the transport case nozzle portion 31.

  Further, as shown in FIGS. 7B and 8, a plate fitting groove 63 having a predetermined length along the cylinder axis direction from the inner peripheral edge is formed on the inner wall of the end of the cylindrical portion 60 on the upper side in the conveying direction. A plurality of (four in this embodiment) are formed in a notch shape at equal intervals, and the screen plate 7 and the rotary shaft bearing 7a can be inserted into the cylindrical portion 60.

  As shown in FIG. 4, the screen plate 7 is interposed between the screw 4 and the storage portion 6, partitions the inside of the transport case 3 and the storage portion 6, and has a plate surface on which the inside of the transport case 3 and the storage portion are stored. A plurality of communication holes 70 for communicating the part 6 with each other are formed.

  The screen plate 7 has a disk-shaped disk main body 73, and the cylindrical body 60 is fitted around the outer periphery of the disk main body 73 as shown in FIGS. 9 (a) and 9 (b). A plurality (four in the present embodiment) of protruding projections 71 corresponding to the fitting groove 63 are formed at regular intervals on the outer periphery.

  9B and 10, the disc body portion 73 of the screen plate 7 has a bearing groove 72 that rotatably supports the rotating shaft 40 of the screw 4 together with the driving portion 103 at the center portion. At the same time, a large number of communication holes 70 are disposed around the bearing groove 72 so as to penetrate therethrough.

  Such a communication hole 70 of the screen plate 7 functions as a mesh hole that allows the food material to pass through and backs up and promotes uniform distribution of components and properties in the food material.

  The diameter of the hole of the communication hole 70 is not particularly limited as long as the mesh hole function can be achieved, but the diameter loss of the pressing force by the screw 4 is reduced to 3 mm to 20 mm, more preferably 5 mm to 15 mm. It is preferable.

  With this configuration, the screen plate 7 supports the rotary shaft 40 of the screw 4 while being fitted in the holder member 51 and attached to the transport case 3, and partitions the interior of the transport case 3 and the storage portion 6. By allowing the food material to pass through the communication hole 70, the distribution of the ingredients and properties of the food material is promoted to be uniform, and the shaft 4 of the rotating shaft 40 of the screw 4 can be prevented from running out.

  In addition, when processing the food raw material which can be stably extruded without using the screen plate 7, a cross-shaped rotary shaft bearing 7 a is fitted into the holder member 51 as shown in FIG. 11.

  The rotary shaft bearing 7a includes a disk-shaped bearing portion 74 forming a central portion, and a plurality of (four in the present embodiment) projecting at equal intervals around the outer periphery of the bearing portion 74 to form a cross shape, and a cylindrical portion at the tip portion A plurality of fitting arms 75 corresponding to fitting to the 60 plate fitting grooves 63.

  Further, in the center of the bearing portion 74, as in the screen plate 7, a bearing groove 76 that pivotally supports the rotating shaft 40 of the screw 4 together with the driving portion 103 is formed.

  Further, as shown in FIGS. 3 and 4, an inner knife 8 that is in sliding contact with the plate surface of the screen plate 7 and that can rotate integrally with the screw 4 is provided at a lower position in the conveying direction of the screw 4.

  The inner knife 8 is a cross-shaped rotating body as shown in FIGS. 12A and 12B, and has a mounting base 80 that forms a central portion and a predetermined interval around the mounting base 80. There are four blade portions 81 extending radially outward with a cross shape.

  As shown in FIG. 13, the mounting base 80 is fitted with a fitting nut 42 provided at the shaft tip 40b of the rotary shaft 40 of the screw 4, so that the inner knife 8 can be fitted. As shown in (b), a rectangular mounting fitting hole 82 is formed so as to extend along the outer shape of the fitting nut 42.

  The blade portion 81 has a blade support arm 83 extending outward from the mounting base 80 as shown in FIG. 12B, and a direction facing the plate surface of the screen plate 7 along the longitudinal direction of the blade support arm 83. And a blade body 84 formed so as to protrude. The blade portion 81 has a substantially “L” -shaped cross-sectional shape by the blade support arm 83 and the blade body 84.

  The blade body 84 has a surface facing the plate surface of the screen plate 7 positioned at a substantially central portion in the short direction of the blade portion 81 from one end edge 84a forming the outer edge of the blade portion 81 in a cross-sectional view of the blade portion 81. An inclined surface 84c which gradually inclines as being separated from the plate surface of the screen plate 7 over the other end edge 84b is formed, and the one end edge 84a is conveyed in the direction of conveyance of the screen plate 7 as shown in FIGS. It forms so that it may be set as the slidable contact part which carries out a line contact along the ridgeline R with respect to the board surface of the upper side.

  With such a configuration, the inner knife 8 rotates integrally with the screw 4, slides with respect to the plate surface of the screen plate 7, and enters the communication hole 70 on the upper side in the transport direction of the screen plate 7. Can be cut along the plate surface. In addition, since the inner knife 8 is used to cut off the fiber when processing a food material having a large amount of fibers such as meat muscles, it is not necessarily required when processing other food materials.

  Further, on the lower outer side in the conveyance direction of the conveyance molding unit 2, as shown in FIG. 14, a cutting unit 9 that slidably contacts the outer surface of the die 5 and cuts the food material discharged from the die 5 by a predetermined length. Is detachably attached.

  The cutting section 9 can adopt a rotary cutter type when producing a molded food having a relatively short length, for example, a pellet-shaped molded food such as a pet food, and a molded food having a relatively long length, such as a jerky A guillotine cutter type can be adopted when producing a rod-shaped molded food.

  The cutting unit 9 according to the present embodiment is a rotary cutter type, and includes a drive motor 94a as shown in FIG. 14, a cutting housing 90 that can be attached to and detached from the conveyance molding unit 2, and a cylindrical shaft of the conveyance molding unit 2. A rotary drive shaft 91 that is connected to the drive motor 94 a and has a base end connected to the central portion of the outer surface of the die 5 and rotates, and a rotary drive shaft at the tip of the rotary drive shaft 91. 91, and a rotary cutter 92 that is rotatably attached integrally with the die 91 and that cuts the molded food while rotating while sliding on the outer surface of the die 5.

  The cutting housing 90 is continuously provided via a fixed frame portion 93 that can be fitted and fixed to the transport case 3 and a support bar 93a that extends from the fixed frame portion 93 in the axial direction, and is provided with a drive motor 94a. And a cylindrical storage portion 94.

  The fixed frame portion 93 is attached to a portion (for example, a portion where the annular joint 54 is disposed) behind the die main body portion 52 in the transport case 3, and extends in a rectangular bowl shape with respect to the cylindrical transport case 3. Is provided.

  The storage portion 94 is arranged at a position in front of the die 5 so as to face the outer surface of the die 5, and is provided with four support bars arranged in parallel around the transport case 3 with respect to the fixed frame portion 93. It is provided in a state supported by 93a.

  The rotary drive shaft 91 protrudes rearward from the storage portion 94 and is supported in a state where the rear end portion is in contact with a support portion 52a (see FIG. 8) formed at the center portion of the outer surface of the die 5. Yes. A rotary cutter 92 is provided in the vicinity of the support portion of the rotary drive shaft 91 for the die 5.

  Thus, the cutting housing 90 is provided so as to surround the configuration including the rotary drive shaft 91 and the rotary cutter 92 extending forward from the die 5.

  As shown in FIGS. 15A and 15B, the rotary cutter 92 is a thick metal piece having a U-shape, and one end of the rotary cutter 92 is connected and fixed to the tip of the rotary drive shaft 91. A blade portion 95 is formed along the edge of the shape on the mountain side.

  Specifically, the rotary cutter 92 is formed as a shaft fixing portion 96 that fixes the end portion on the long side that forms a square shape to the rotary drive shaft 91, and as shown in FIG. A blade portion 95 having an inclined surface is formed so as to gradually become thinner from the edge on the side to the edge on the mountain side.

  With such a configuration, the cutting part 9 can be attached to and detached from the transport molding part 2, and the rotary cutter 92 that slides and rotates with the blade part 95 aligned with the outer surface of the die 5 has a predetermined rotational pitch. The food raw material continuously discharged from the plurality of mold holes 50 of the die 5 can be sequentially cut to a predetermined length as it rotates.

  In addition, when cutting the food raw material which has many fiber and requires shearing force, the rotary cutter 92 uses a hemi-shaped thing like this embodiment, but when cutting other food raw materials Is made of a thin metal piece with a straight shape. Specifically, a rotary cutter is used in which the end portion of the linear metal piece is the shaft fixing portion blade portion, the length of the metal piece is inclined in a sectional view, and the one longitudinal edge is the blade portion.

  Further, when the guillotine cutter type is adopted as the cutting part 9, the cutting part 9 receives and conveys the food material continuously formed and discharged from the plurality of mold holes 50 of the die 5, A length detection sensor that detects the desired length of molded food, and is stopped by the signal of the length detection sensor, and is slid up and down on the outer surface of the die 5. It is also a proposal to configure with a guillotine cutter.

  And according to the extrusion molding machine A provided with such a structure, a molded food is manufactured as follows. 16 and 17 are explanatory views showing the usage state of the extrusion molding machine A. FIG. In addition, the food raw material M provided to the extrusion molding machine A according to the present embodiment is, as an example, a meat raw material, and the meat raw material contains a dama D as a binding lump and a meat reinforcement F as a fiber.

  The food material M introduced into the hopper 1 is guided to the discharge port 16 of the hopper 1 while being subjected to the kneading and stirring action by the rotating stirring paddles 11 a and 11 a ′, and the latter half of the screw 4 exposed at the discharge port 16. It is pushed into 4a and introduced.

  The food raw material M introduced into the latter half 4a of the screw 4 is further subjected to kneading and stirring action in the transport case main body 30 as shown in FIG. It is sent to the lower side in the transport direction as quickly as possible while downsizing D.

  The food material M inside the transport case 3 reaches the transport case nozzle part 31 as the screw rotates, and is compressed by the front half 4b of the screw 4 to become high density.

  At this time, an engaging portion 34 formed on the inner peripheral surface of the transport case nozzle portion 31 is located outside the food raw material in the first half 4b of the screw 4 and the food raw material M is formed by the engaging portion 34. Co-rotation with the screw 4 is prevented.

  Next, the food material M on the lower side in the transport direction is pressed by the screw 4 and enters the communication hole 70 of the screen plate 7 as shown in FIG.

  Specifically, the meat muscle F in the food material M is cut into the communication hole 70 in a state of being cut by the inner knife 8 that slides and rotates on the screen plate 7 on the lower side in the conveying direction of the screen plate 7 and is subdivided into short sides. enter in.

  Further, the lumps D in the food material are subdivided by being loosened below the diameter of the communication hole 70 by the food material M passing through the communication hole 70 together with the rotational cutting action of the inner knife 8.

  Next, the food material M that has passed through the communication hole 70 of the screen plate 7 reaches the storage section 6 in the holder member 51, and is temporarily stored to become a food material lump M1 along the shape of the storage space 6a. Specifically, the food raw material mass M1 is a state where the food raw material M fills the storage space 6a of the storage unit 6 and is compressed.

  The food ingredient lump M1 in the reservoir 6 is pressed with a constant pressing force toward the die 5 surface through the food ingredient M that is continuously supplied from the screw 4 from the upper side in the conveying direction of the reservoir 6. In other words, the food raw material mass M1 is continuously compressed to increase in density due to the food raw material M supplied from the upper side in the conveying direction and becomes a compressed mass, and is pushed downstream in the conveying direction when the compression density limit is exceeded. .

  At this time, the food raw material mass M1 of the storage unit 6 eliminates the height difference in the bulk density of the food raw material between the screw 4 and the die 5 in the conveying direction, and the pulsation of the screw 4 in the length (thickness) in the conveying direction. ) And the pressure applied by the screw 4 is regulated to a uniform pressure applied to the plurality of mold holes 50 of the die 5.

  As a result, the food material M2 is discharged from the plurality of mold holes 50 of the die 5 at the same extrusion amount while being stably molded as shown in FIG. A molded food product can be obtained by cutting with the cutting part 9 attached to the outside of.

  Thus, according to the extrusion molding machine A, the pulsation caused by the screw 4 is suppressed as much as possible regardless of the properties of the food material M, and the food material M2 is simultaneously and stably controlled from the plurality of mold holes 50 of the die 5. Thus, a plurality of molded foods having good moldability can be stably and simultaneously manufactured.

[Second Embodiment]
Next, a second embodiment of the extrusion molding machine according to the present invention will be described. 18, 19 and 20 are explanatory views showing the structure of the holder member of the extrusion molding machine. In addition, below, about the structure similar to the above-mentioned extrusion molding machine A, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The extrusion molding machine according to the present embodiment has substantially the same configuration as that of the extrusion molding machine A according to the first embodiment, and with the same extrusion amount while molding a food material from a plurality of mold holes of the die. Although it is configured to be capable of discharging, the configuration is different in that the storage portion and the die are deformed.

  That is, in the holder member 57 of the extrusion molding machine, the plurality of mold holes 59 of the die 58 are arranged on the same straight line as shown in FIG. As shown in FIG. 19, at least a part of the inner wall surface of the cylindrical portion 65 is configured to have a tapered surface 66 that expands from the lower side to the upper side in the transport direction.

  In other words, at least two mold holes 59 are formed on the die 58 so as to be arranged on the same straight line, and the tapered surface 66 extends from the mold hole 59 on the lower side in the transport direction. It is formed in the inner wall of the cylinder part 65 so that it may open.

  More specifically, the plurality of mold holes 59 of the die portion 58a that forms the die 58 are provided as shown in FIG. The die 58 is formed so as to penetrate the die 58 so as to be arranged at a predetermined interval on the same line).

  The die 58 is attached to the conveyance molding unit 2 so that a plurality of mold holes 59 arranged on the same straight line are positioned horizontally. In the present embodiment, four mold holes 59 are formed at equal intervals along the virtual center line C.

  Of the inner wall surface of the cylindrical portion 65 that forms the storage portion 64 together with the die portion 58a, the upper and lower opposing surfaces have an inner diameter of the cylindrical portion 65 on the lower side in the conveying direction as shown in FIGS. The upper and lower tapered surfaces 66, 66 ′ are formed from the lower side in the transport direction toward the upper virtual center line C so as to gradually decrease from the upper side to the upper side. The upper and lower tapered surfaces 66, 66 'are inclined planes or planes formed substantially symmetrically about the position of the virtual center line C in the vertical direction.

  Further, of the inner wall surface of the cylindrical portion 65, the surfaces facing the left and right sides between the upper and lower tapered surfaces 66, 66 ′ are, as shown in FIG. 20, the width of the virtual center line C (diameter of the die) in a plan view. Are formed on the inner peripheral surfaces 67 and 67 ′ extending along the cylinder axis so as to maintain the same length. The left and right inner peripheral surfaces 67 and 67 ′ are substantially flat surfaces extending along a direction (cylinder axis) orthogonal to the virtual center line C or curved surfaces along the outer shape of the cylinder portion 65.

  That is, the inner peripheral surface of the cylindrical portion 65 has a tapered surface 66 that gradually reduces the inner diameter of the cylindrical portion 65 toward a virtual center line C located on the lower side in the transport direction in a side sectional view as shown in FIG. As shown in FIG. 20, the left and right inner peripheral surfaces 67 extending perpendicularly to the virtual center line C on the left and right sides between the upper and lower tapered surfaces 66, 66 ′ and extending along the outer shape of the cylindrical portion 65. , 67 ′.

  For example, the four surfaces of the upper and lower tapered surfaces 66, 66 ′ and the left and right inner peripheral surfaces 67, 67 ′ are substantially in the circumferential direction centered on the axial center position of the cylindrical portion 65 when viewed in the axial direction of the cylindrical portion 65. It is formed to have an equal angle range, that is, each surface occupies an angle range of approximately 90 °.

  With such a configuration, the holder member 57 forms a substantially frustum-shaped food raw material lump that is gradually sharpened toward the lower side in the conveyance direction by the reservoir 64, and conveys the frustum-shaped food raw material lump. It is possible to concentrate the pressing force of the screw loaded from the lower side in the direction along the tapered surfaces 66 and 66 ′ to the tip portion having a frustum shape.

  As a result, the pressing force exerted by the screw 4 concentrated on the tip portion of the food raw material lump is concentrated on the plurality of mold holes 59 of the die 58 on the lower side in the conveying direction of the food raw material lump, thereby being relatively sticky. Even if the food material has a strong binding property, the food material can be molded and discharged from the mold hole 59 against the internal passage resistance of the mold hole 59. Of course, the above-described screen plate 7 can be inserted even in the holder member 57 according to the present embodiment.

  As described above, according to the present invention, the pulsation caused by the screw is suppressed as much as possible regardless of the positional relationship between the die mold hole and the tip of the screw that is driven to rotate, and the food material is fed from the die mold hole. Can be stably discharged, and there is an effect that a molded food having good moldability can be stably and continuously produced.

  That is, the storage part functions as a clearance part that absorbs the pulsation of the screw while eliminating the bulk density difference of the food raw material between the screw and the die, and the pressing force applied to the die surface passes through the plurality of mold holes. The same amount of food can be fed simultaneously from the mold holes of the die by allowing it to function as a pressure regulator that regulates the pressure to a uniform pressing force and allowing the food ingredients to pass through the reservoir to the mold holes of the die. There is an effect that the raw material can be formed and discharged continuously and stably. In addition, there is an effect that the distribution of the components and properties of the molded food produced by this apparatus can be made uniform, and the quality as a product can be improved.

  Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment, and the present invention is not limited to the above-described embodiments. Of course, various modifications can be made according to the design or the like as long as they do not depart from the technical idea.

A Extruder 1 Hopper 2 Transport Molding 3 Transport Case 4 Screw 5 Die 6 Storage 7 Screen Plate 8 Inner Knife

Claims (9)

In an extrusion molding machine for extruding food ingredients and forming them into a certain shape,
A hopper for charging the food ingredients;
A transport molding unit that receives the food raw material charged into the hopper and transports the food raw material in a predetermined transport direction to form it,
The conveyance molding unit
A transport case provided at a position below the hopper and extending along the transport direction;
A screw provided in the transport case so as to be rotatable with the transport direction as an axial direction of a rotation shaft, and having a spiral blade around the rotation shaft;
A die provided on the lower side of the transport direction of the transport case and having a mold hole through which the food material passes,
An extrusion molding machine characterized in that a storage part is formed for temporarily storing the food raw material conveyed by the rotational drive of the screw and pushed out from the mold hole on the upper side in the conveying direction of the die. The die is configured by a holder member that is detachably provided on the transport case,
The holder member includes a die body portion in which the mold hole is formed,
The extrusion machine according to claim 1, further comprising: a cylindrical portion that forms a storage space for food raw materials together with the die body portion in the storage portion.   The said storage part has a taper surface which expands the said cylinder part toward the upper side from the lower side in the said conveyance direction in at least one part of the inner wall face of the said cylinder part. Item 3. An extrusion molding machine according to Item 2.   The mold hole is formed in the die so as to be arranged on the same straight line with at least two or more, and the tapered surface is expanded from the mold hole on the lower side in the conveying direction. The extrusion molding machine according to claim 3, wherein the extrusion molding machine is formed on an inner wall of the cylindrical portion.   A screen plate in which a plurality of communication holes are formed between the screw and the storage part so as to partition the inside of the transfer case and the storage part and communicate the inside of the transfer case with the storage part. The extrusion molding machine according to any one of claims 1 to 4, wherein the extrusion molding machine is provided.   6. The extrusion molding according to claim 5, wherein an inner knife that slides in contact with the plate surface of the screen plate and that can rotate integrally with the screw is provided at a lower position in the conveying direction of the screw. Machine.   The extrusion molding machine according to any one of claims 1 to 6, wherein an engagement portion with which the food material is engaged is formed on an inner peripheral surface of the transport case.   The extrusion molding machine according to any one of claims 1 to 7, wherein the spiral blade of the screw is formed so that a pitch on the lower side is smaller than a pitch on the upper side in the conveying direction. The extrusion molding machine according to any one of claims 1 to 8, wherein the rotation shaft of the screw is formed to have a diameter on the lower side larger than a diameter on the upper side in the conveying direction.

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