JP2006051713A - Raw material deaerating and feeding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of a situation in which a product using ground fish as a raw material by removing bubbles left in the raw material is deformed, or holes are formed in the sliced product. <P>SOLUTION: With regard to a feeder which kneads the raw material ground fish by a pump having screw shafts and pressurizes and delivers the ground fish as the pump, a pair of the screw shafts 14 and 14' which are different in pitch between raw material suction sides 15 and 15' and discharge sides 16 and 16'. Deaeration nozzles 17 and 17' are installed in a casing 11 of a pressure increasing place in the vicinity of the boundary between the suction side and the discharge side of each screw shaft 14 or 14', and the pump 20 for collecting bubbles and the raw material extracted together with the bubbles is installed outside a nozzle opening. A collecting course for returning the raw material collected by the deaeration nozzles 17 and 17' to the pump is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a deaeration feeding device that feeds and feeds pressure by a pump having a screw shaft using surimi as a raw material.

  For example, a processed fishery product such as salmon is formed in a target mold using fish meat as a surimi, and thus a raw material is kneaded with a screw pump. At that time, air may be taken into the raw material in the form of bubbles, and if the product is manufactured without removing the bubbles, the surface of the product will be bumpy due to the bubbles, or a piece of straw that has been cut into thin pieces There is a problem that it looks bad because it is in a state where a hole is opened.

  As a technique for removing air taken into the mixture, there is an example of an extrusion molding method disclosed in Japanese Patent Laid-Open No. 5-220803 for a powder material, and a method of introducing the mixture into a vacuum deaeration chamber and removing the air is disclosed. Has been. However, the present invention cannot be applied to remove bubbles contained in the raw material of the kneaded product that is the subject of the present invention.

Japanese Patent Laid-Open No. 5-220803

  The present invention has been made paying attention to the above points, and its object is to remove bubbles remaining in a raw material made of surimi. In addition, another object of the present invention is to provide a raw material deaeration feed device that does not cause a situation in which a product made from surimi is deformed or a hole is opened when the product is cut into thin pieces. Is to provide.

  In order to solve the above-mentioned problems, the present invention relates to a deaeration feeding apparatus that feeds and feeds surimi using raw material as a raw material by a pump having a screw shaft. A pair of screw shafts is provided, and a degassing nozzle is installed in the casing where the pressure increases near the boundary between the suction side and discharge side of each screw shaft, and the material extracted with the bubbles and bubbles is collected. The recovery pump to be installed is installed outside the nozzle opening.

  The apparatus which concerns on this invention is comprised in relation to the pump which pumps the surimi used as a raw material, and what has a screw shaft as a pump becomes object. The screw shafts are a pair of two shafts, each having a reverse thread, and the screw shaft is placed in a cylinder with the thread of one screw shaft and the valley of the other screw shaft engaged. The raw material existing between the screw shaft and the cylindrical chamber is pumped by rotation.

  The screw shaft according to the present invention is characterized in that the screw pitch is different between the suction side for sucking in the raw material and the discharge side for feeding the pumped raw material to the outside of the machine. Specifically, the pitch is increased on the suction side of the screw shaft, and the pitch is decreased on the discharge side, thereby increasing the pressure at the transition portion to the discharge side where the pitch is reduced. Is something that can be done.

For this reason, a deaeration nozzle is provided as an air vent at a transition portion from the suction side to the discharge side of the screw shaft, in other words, at a location where the pressure near the boundary between the suction side portion and the discharge side portion increases. One end of the deaeration nozzle is connected to the inside of the casing having a pair of two screw shafts, and the other end is connected to the outside of the casing, thereby demonstrating the function of releasing excessive internal pressure to the outside. To do. In many cases, the air or bubbles extracted from the deaeration nozzle move together with the raw material in which the air or bubbles existed.

  Therefore, a recovery pump for recovering the raw material extracted together with the bubbles is installed outside the nozzle port. Although this recovery pump does not need to be special, it may constitute means for recovering surimi extracted from the pressure pump as a raw material and returning it to a hopper for supply to the pressure pump from the recovery pipe. desirable. That is, the recovered raw material is returned to the pressure pump to effectively use the raw material.

Since the present invention is configured and operates as described above, bubbles remaining in the raw material made of surimi can be removed through a deaeration nozzle by a pair of screw shafts having different pitches. A degassing feed device for raw materials that does not cause a situation such as deformation of the product surface using surimi as raw material or a hole in the product when the product is cut into thin pieces There is an effect that it can be provided.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 is a front view showing an embodiment of a deaeration feeding device 10 according to the present invention. In the figure, 11 is a casing, and has a supply part 12 leading to a raw material hopper at one upper end. The discharge port 13 is provided at the tip of the other end.

  Inside the casing 11, as a pressure feed pump, a pair of two shafts including a right-hand screw shaft 14 and a left-hand screw shaft 14 'that can mesh with the right-hand screw shaft 14 are incorporated so as to rotate in opposite directions. . See FIG. The screw shafts 14, 14 ′ have different pitch threads and screws on the raw material suction side 15, 15 ′ closer to the supply unit 12 and the raw material discharge side 16, 16 ′ closer to the discharge port 13. There is a valley, and the pitch on the suction side 15, 15 ′ is set smaller than the pitch on the discharge side 16, 16 ′. In the experimental example, the ratio of the pitches P and Q on the suction side and the discharge side is 3: 2, and good results are obtained. See FIG. 2A.

  The pair of screw shafts 14, 14 'of the two shafts has substantially the same length on both the suction side 15, 15' and the discharge side 16, 16 '. Therefore, the discharge side 16, 16 'has a smaller discharge flow rate than the suction side 15, 15' by the smaller pitch, and the pressure rises near the boundary between the suction side portion and the discharge side portion where the pitch changes. Thus, a situation is created in which the air in the raw material easily moves to the suction side at a lower pressure.

  Further, deaeration nozzles 17 and 17 'are installed near the boundary between the suction side portion and the discharge side portion of the casing 11 in this apparatus. The deaeration nozzles 17 and 17 'are installed at corresponding portions of the two shafts and a pair of screw shafts 14 and 14' (see FIGS. 4 and 5). The illustrated deaeration nozzles 17 and 17 ′ are illustrated as one location on each screw shaft 14 and 14 ′, but the number and installation locations are matters that can be changed in design.

  A recovery unit hopper 18 is provided below the degassing nozzles 17, 17 ′ for recovering the raw material extracted together with the bubbles. A recovery pump 20 is provided below the hopper 18 as a pair of two-shaft gears 19. , 19 '. The gears 19 and 19 ′ are incorporated in a gear case 21, and a recovery pipe 22 extends from the recovery pump 20 toward the raw material hopper 23.

  In FIG. 1, 24 is a gear shaft, 25 is a bearing, 26 is an extension shaft, 27 and 28 are sprocket wheels, which are coupled by a chain 29 and transmit the power of the geared motor 30 to the gear 19. In each figure, 31 is an external hopper in the raw material hopper 23, 32 is a kneading section, and includes a supply cylinder 33 provided in the lower part of the raw material hopper 23 and a spiral blade 34 provided in the supply cylinder. And a motor 36 for driving the kneading shaft 35. In addition, the kneading part 32 is provided in the base 37 via the post 38, as FIG. 3 shows.

  Since the apparatus 10 of the present invention has such a configuration, when the raw material is charged into the raw material hoppers 23 and 31, the raw material is fed into the casing 11 from the supply unit 12 while being kneaded in the kneading unit 32, and further the screw shaft. 14 and 14 ', the suction side 15 and 15' is sent to the discharge side 16 and 16 '. At this time, the pitch of the screw threads of the screw shafts 14 and 14 'is set large on the suction side 15 and 15' and small on the discharge side 16 and 16 '. In the vicinity of the boundary to ′, the internal pressure increases, the raw material is compressed, and the internal air is pushed. For this reason, the raw material whose pressure has risen seeks the outlet together with air, and escapes to the outside from the deaeration nozzles 17 and 17 ′ provided near the boundary. The air discharged to the outside of the casing is released into the air. On the other hand, the raw material is captured by the recovery unit hopper 18, pushed up to the recovery pipe 22 by the recovery pump 20, recirculated to the raw material hopper 23, and again removed from the above-described manner. It will go through a plowing process.

  After the deaeration process by the deaeration nozzles 17 and 17 ′, the raw material travels to the discharge port 13 through the discharge side 16 and 16 ′ having a higher pressure than the suction side 15 and 15 ′, but the discharge side 16 and 16 ′. There is a gradient in the internal pressure acting on the raw material in FIG. For this reason, even if there is still air remaining on the discharge side 16, 16 ′, it gradually moves to the vicinity of the boundary, and is eventually extracted from the degassing nozzles 17, 17 ′ to the outside. Even if air remains, it becomes very small and does not take the form of bubbles.

The partially broken front view which shows the Example of the deaeration feed apparatus of the raw material which concerns on this invention. A and B are plan views of a pair of two screw shafts, and C is an end view. The whole front view which shows the Example of the deaeration feed apparatus of the raw material which concerns on this invention. FIG. 4 is a left side view with respect to FIG. 3. The partial expanded sectional view which shows a deaeration part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Deaeration feeder 11 Casing 12 Supply part 13 Discharge part 14, 14 'Screw shaft 15, 15' Suction side 16, 16 'Discharge side 17, 17' Deaeration nozzle 18 Recovery part hopper 19, 19 'Screw shaft 20 Recovery Pump 21 Gear case 22 Recovery pipe 23 Raw material hopper 31 External hopper 32 Kneading part 33 Supply cylinder

Claims (2)

A feed apparatus that pumps and feeds surimi as raw material by a pump having a screw shaft, and includes two pairs of screw shafts having different pitches on the suction side and the discharge side of the raw material as pumps. Install a degassing nozzle on the casing where the pressure increases near the boundary between the suction side and discharge side of the shaft, and install a recovery pump that collects the bubbles and the material extracted along with the bubbles outside the nozzle port. A deaeration feed device for a raw material having the structure described above. 2. The raw material degassing / feeding device according to claim 1, further comprising a recovery system for returning the raw material recovered by the degassing nozzle to the pump.

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