JP6339477B2 - Equipment for removing magnetic foreign substances in raw resin - Google Patents

Description

   The present invention is an apparatus for removing magnetic foreign matter in a raw material resin, which separates and removes magnetic foreign matters such as iron powder mixed in the raw material resin of various shapes such as pellets, flakes, granules, etc. About.

  Not only recycled resin but also new raw material resin contains fine iron powder, stainless steel powder, magnetic alloy powder such as magnetic alloy powder, and when the foreign material is mixed and conveyed to the molding machine, Not only will important parts such as nozzles and cylinders be damaged, but the mold will also be adversely affected. Further, there is a problem in that the quality of the molded product is deteriorated by mixing magnetic foreign substances into the synthetic resin molded product.

  For this reason, conventionally, for example, a metal collecting pipe with a magnetic bar attached detachably is attached in the middle of the pipe of the suction pipe to convey the raw resin, and magnetic foreign substances mixed in the raw resin passing through the suction pipe are removed. The magnet bar is taken out from the metal collection tube at regular intervals, and a magnetic cloth is rubbed off by applying a thick cloth or the like to the outer peripheral surface of the magnet bar.

Patent Document 1 listed below discloses a conventional removal device for iron powder and the like.
That is, an apparatus for removing iron powder or the like mixed in the synthetic resin pellets disclosed in Patent Document 1 is attached to the pipe line of the pipe that conveys the synthetic resin pellets, and iron powder or the like mixed in the synthetic resin pellets. In the apparatus for adsorbing and removing the magnetic body, a bar magnet body is detachably inserted into the opening of the metal collection tube main body with one end closed and the other end opened. In the vicinity of both ends of the collector body, an inlet / outlet pipe is projected so as to be orthogonal to the metal collector pipe body, and a pipe for carrying the synthetic resin pellets is connected to the inlet / outlet pipe, and the synthetic resin in the metal collector pipe body The pellet conveying speed is reduced, and the magnetic material such as iron powder mixed in the synthetic resin pellet is favorably adsorbed on the surface of the bar magnet body. Iron powder mixed in Magnetic foreign matter can be a remove efficiently.

No. 3044299 registered utility model gazette

  When the apparatus for removing iron powder or the like disclosed in Patent Document 1 is used, the periphery of the inlet pipe of the raw material in the metal collection pipe main body is at the same level as the bottom surface of the collection pipe main body. When the processing line is temporarily stopped, there is a problem that the raw material stays around the raw material inlet pipe in the metal collection pipe main body.

  If the raw material resin stays in the metal collection tube body, the following problems occur. First, when the air transportation of the raw material resin is stopped, the inside of the collection tube body is in a negative pressure state, the raw material resin flows back into the collection tube body, and the raw material resin in the collection tube body is pressed against each other. Invite a situation of clogging. At the synthetic resin molding site, clogging of the raw material resin causes a decrease in production efficiency.

  Also, when using a resin compound that uses a different colorant, if the previous raw resin remains in the collection tube body, it will be mixed with the newly added colored resin and the desired color tone There is a problem that cannot be obtained.

  In addition, if the raw material resin stays in the metal collection tube body, when the magnet bar attached to the collection tube body is pulled out, the residual material resin in the collection tube body spills on the floor of the workplace. There is a problem of deteriorating the working environment.

  On the other hand, if raw material resin, especially hard synthetic resin raw material is continuously sucked through the inlet pipe formed in the metal collection pipe body, it is concentrated on one place of the bar magnet body arranged in the collection pipe body. There is a problem that the bar magnet body is damaged as time passes.

  In particular, the bar magnet body is configured by laminating rare earth magnet elements such as neodymium in a relatively thin cylindrical cylindrical case, and the raw material resin continuously collides with the cylindrical case of the bar magnet body. As a result, there is a problem that the holes are gradually opened to expose the rare earth magnet element inside, and fragments of the rare earth magnet element are mixed into the raw material resin.

Therefore, the present invention eliminates various problems associated with the removal device for iron powder and the like mixed in the above-mentioned conventional synthetic resin pellets, and when the synthetic resin molding processing line is temporarily stopped , Inside the collection tube main body where the magnet bar is inserted so that most of the raw material resin in the collection tube main body including the outlet part protruding obliquely upward on the upper side surface falls into the raw material resin tank etc. in conjunction with the raw material resin is prevented from staying, it is an object to provide a magnetic foreign matter removing apparatus of no possibility of raw material resin damaging the magnet bar by continued use.

If the structure of this invention for solving the said subject is explained in full detail, the invention which concerns on Claim 1 will be attached in the processing line of the synthetic resin molded product from a raw material resin supply source to a molding machine, and in raw material resin In the magnetic foreign matter removing device in the raw material resin that separates and removes magnetic foreign matters such as iron powder mixed in the raw material resin in the process line The lower end opening of the collection tube main body arranged in the soot direction in the above is set as the inlet portion of the raw material resin sucked from the raw material supply source, and the upper end opening of the collection tube main body A magnetic bar with a hook is detachably inserted, and magnetic foreign matter in the raw material resin sucked from the lower end opening of the collection tube body is magnetically attached to the magnet bar, and the upper portion of the collection tube body Diagonally upward on the side And突成the outlet portion of the raw material resin Te, when no raw material resin that is the removal of the magnetic material from the said outlet so as to carry-out to the next step, the operation of the processing line has stopped, the upper part of the collecting tube body Magnetic foreign matter removal in the raw material resin, characterized in that the raw material resin in the collection tube body including the outlet portion protruding obliquely upward on the side surface falls to its lower raw material resin supply source. Device.

  According to a second aspect of the present invention, the magnet bar includes a magnet main body portion in which a large number of magnet elements are laminated in a stainless steel cylindrical case, and a solid stainless steel head portion formed in an upper recess of the cylindrical case. It is comprised, The said head part is formed in cone shape, It is a magnetic foreign material removal apparatus in the raw material resin of Claim 1 characterized by the above-mentioned.

  When the magnetic foreign matter removing device in the raw material resin according to the present invention is used, even if the synthetic resin molding processing line is temporarily stopped, most of the raw material resin falls by its own weight, and the raw material resin is placed in the collection tube body. Therefore, it is possible to effectively prevent the clogging of raw materials generated in the collection tube main body, and to maintain the production efficiency at the synthetic resin molding process site.

  Also, even when molding different color synthetic resin compounds using the same synthetic resin molding processing line, the colors will not mix and it will be possible to suppress the occurrence of defective products, and when pulling out the magnet bar In addition, since there is no possibility that the residual raw material resin in the collection pipe body spills on the floor of the workplace, an epoch-making effect of maintaining the work environment can be obtained.

  Furthermore, when a hard material such as an engineering plastic is used as a raw material resin, the raw material resin having various shapes such as pellets, flakes, and granules continuously flowing into the collection tube main body. Collided with the magnet bar in the collector tube body, which conventionally damaged the stainless steel cylindrical case in the magnet bar, opened holes over time, exposing the rare earth magnet elements inside, and in the raw resin Although there was a problem that fragments of the magnet element were mixed, according to the present invention, such a problem can be solved.

It is explanatory drawing which shows one Embodiment of the synthetic resin shaping | molding processing line incorporating the magnetic foreign material removal apparatus in the raw material resin which concerns on this invention. It is explanatory drawing which shows one Embodiment of the collection pipe | tube main body which comprises a magnetic foreign material removal apparatus. It is explanatory drawing which shows other embodiment of the collection pipe | tube main body which comprises a magnetic foreign material removal apparatus. It is explanatory drawing which shows one Embodiment of the stainless steel head parts in a magnet bar, (a) shows the state before attachment of a head part, (b) shows the state after attachment of a head part.

 Hereinafter, a specific configuration of a magnetic foreign matter removing device in a raw material resin according to the present invention will be described in detail with reference to the illustrated embodiment.

  FIG. 1 shows an example of a synthetic resin molding processing line incorporating a magnetic foreign substance removing device in a raw material resin. In FIG. 1, 1 shows the entire processing line including a suction pipe and the like. 2 is a raw material resin supply source comprising a pellet tank and the like, 3 is a molding machine, 4 is a power source for sucking the raw material resin in the raw material resin supply source 2 into a hopper 5 disposed in the upper part of the molding machine 3. This is a hopper loader. Reference numeral 6 denotes a hopper dryer that receives the raw material resin sucked into the hopper 5, and the raw material resin is supplied to the molding machine 3 through the hopper dryer 6.

  The apparatus for removing magnetic foreign substances in the raw material resin according to the present invention is attached to the processing line 1 of the synthetic resin molded product from the raw material resin supply source 2 to the molding machine 3 and mixed with the raw material resin such as iron powder. In the embodiment shown in FIG. 1, a stainless steel collecting tube body 7 having both upper and lower ends opened from a raw material resin supply source 2 to a hopper. The lower end opening 8 of the collection pipe body 7 arranged in the soot direction in the processing line 1 leading to 5 is set as the inlet portion of the raw material resin sucked from the raw material supply source 2. A magnet bar 10 having a collar 11 is detachably inserted into the upper end opening 9 of the collection tube body 7, and the magnetism in the raw material resin sucked from the lower end opening 8 of the collection tube body 7. Foreign matter is magnetically attached to the magnet bar 10 At the same time, the outlet portion 12 of the raw material resin protrudes obliquely upward on the upper side surface of the collection tube main body 7, and the raw material resin from which the magnetic foreign matter has been removed is carried out from the outlet portion 12 to the next step. Yes.

A magnet bar 10 to be inserted into the upper end opening 9 of the collection tube main body 7 includes a gripping portion 13 which has been knurled as shown in FIG. A flange 11 is fixed at the boundary of the magnetized part 14 for magnetizing a magnetic foreign substance such as.
On the other hand, a ferrule 19 is formed on the periphery of the upper end opening 9 of the collection tube main body 7, and the magnetized portion 14 of the magnet bar 10 is brought into contact with the ferrule 19 so that the flange 11 of the magnet bar 10 is brought into contact with the ferrule 19. Is inserted into the collection tube main body 7. An O-ring (not shown) is interposed between the ferrule 19 and the flange portion 11 of the magnet bar 10, and both are securely fixed using a fastening tool (not shown) such as a clamp joint.

As shown in FIG. 4, the magnetized portion 14 of the magnet bar 10 is fixed to a magnet body portion in which a large number of magnet elements 16 are laminated in a stainless steel cylindrical case 15 and an upper recess 17 of the cylindrical case. A solid stainless steel head portion 18 is provided, and the appearance of the head portion 18 is formed in a cone shape as a whole. As a result, the raw material resin sucked from the lower end opening 8 of the collection tube main body 7, particularly hard engineering plastic, is dispersed by the cone-shaped head portion 18 of the magnet bar 10 so as to form an annular shape, and the magnetized portion 14. As a result, most of the magnetic foreign matters such as iron powder are adsorbed and removed.
When a relatively soft general-purpose resin other than non-engineering plastics is targeted, it is of course possible to use a normal magnet bar that does not have a cone-shaped head, that is, the tip has a flat surface. is there.

  The raw material resin from which the magnetic foreign matter has been removed enters the hopper 5 through the outlet portion 12 of the collection tube main body 7 by the suction force of the hopper loader 4, and is conveyed from here to the molding machine 3 through the hopper dryer 6 and the like. .

  When such a synthetic resin molding processing line is temporarily stopped, that is, when the raw material resin to be used is changed, or when the operation of the processing line is stopped for inspection or the like, the collection tube body 7 is as described above. Since it is arranged in the vertical direction in the processing line 1 from the raw material resin supply source 2 to the hopper 5, the raw material resin in the middle of processing does not fall naturally by its own weight and does not stay in the collection tube main body 7. Therefore, after the operation is restarted, various problems caused by mixing the staying raw material resin and the newly supplied raw material resin can be solved.

  Next, the embodiment shown in FIG. 3 is attached in the processing line of the synthetic resin molded product from the raw material resin supply source to the molding machine, and conveys magnetic foreign matters such as iron powder mixed in the raw material resin. In the apparatus for removing magnetic foreign substances in the raw material resin that is separated and removed in the middle, the stainless steel collection tube main body 70 having both left and right ends opened is arranged in the horizontal direction in the processing line, and is arranged in the horizontal direction. The one end opening 71 of the collecting tube main body 70 is set as an inlet portion of the raw material resin pumped from the raw material supply source by a blower or the like, and the other end opening 72 of the collecting tube main body 70 has a flange 73. The magnetic bar 74 having the detachable insertion is attached to the magnet bar 74 so that the magnetic foreign matter in the raw material resin fed from the one end opening 71 of the collection pipe main body 70 is magnetically attached to the magnet bar 74. 70 Forming a funnel-shaped raw material resin outlet portion 75 on the lower side of the periphery of the other end opening 72, and feeding the raw material resin from which magnetic foreign matters have been removed from the outlet portion 75 to the next step, When the operation of the processing line is stopped, the raw material resin in the collection pipe main body 70 is configured to fall by its own weight downward through the outlet portion 75 provided with the funnel-shaped portion 76.

  The internal structure of the magnet bar 74, the shape of the stainless steel head, the structure for fixing the magnet bar 74 to the other end opening 72 of the collection tube main body 70, etc. are the same as those in the magnetic foreign matter removing apparatus of the above-described embodiment. Therefore, detailed description is omitted.

  Also in the case of the magnetic foreign matter removing device in the raw material resin according to this embodiment, when the synthetic resin molding processing line is temporarily stopped, most of the raw material resin in the collection tube main body 70 is provided with the funnel-shaped portion 76. Since it falls naturally through the part 75, the trouble which arises by mixing the raw material resin which stayed and the newly supplied raw material resin after operation restart can be eliminated.

  As described above, according to the magnetic foreign matter removing apparatus in the raw material resin of the present invention, even if the synthetic resin molding processing line is temporarily stopped, most of the raw material resin naturally falls downward, and on the upper side surface of the collection tube main body. Since the raw material resin does not stay in the collection tube main body including the outlet portion protruding obliquely upward, various problems associated with the raw material resin staying can be solved. That is, it is possible to prevent clogging of raw materials in the collection tube body, and even if different synthetic resin compounds are molded using the same synthetic resin molding processing line, the colors do not mix and are not The generation of non-defective products can be suppressed. Furthermore, when pulling out the magnet bar attached to the collection tube main body, the residual raw material resin does not spill on the floor of the work place and the working environment can be improved.

  In the case of hard materials such as engineering plastics, raw material resins in various shapes such as pellets, flakes, and granules that continuously flow into the collection tube body are collected. Colliding with the magnet bar in the tube body, the stainless steel cylindrical case in the magnet bar was damaged in the past, and a hole was opened over time, exposing the rare earth magnet element inside, and the magnet element in the raw resin Although there is a problem that fragments are mixed in, according to the present invention, such a problem can be solved.

1: Synthetic resin molding processing line 2: Raw material supply source 3: Molding machine 4: Hopper loader 5: Hopper 6: Hopper dryer 7: Collection pipe body 8: Lower end opening 9: Upper end opening 10: Magnet bar 11: Saddle Part 12: outlet part 13: gripping part 14: magnetized part 15: cylindrical case 16: magnet element 17: upper recess 18: stainless steel head part 19: ferrule 70: collecting pipe body 71: one end opening 72 : Other end opening 73: collar 74: magnet bar 75: outlet 76: funnel-shaped part

Claims (2)

In the raw material resin that is attached in the processing line of synthetic resin molded products from the raw material resin supply source to the molding machine, and separates and removes magnetic foreign matters such as iron powder mixed in the raw material resin during the transportation of the raw material resin In the magnetic foreign matter removing apparatus, a stainless steel collecting tube main body having both upper and lower ends opened is disposed in the vertical direction in the processing line, and a lower end opening of the collecting tube main body disposed in the vertical direction is used as a raw material. Set at the inlet of the raw material resin sucked from the supply source, and attach a detachable magnetic bar to the upper end opening of the collection tube body, and suck it from the lower end opening of the collection tube body The magnetic foreign material in the raw material resin is magnetically attached to the magnet bar, and the outlet portion of the raw material resin protrudes obliquely upward on the upper side surface of the collection tube body, and the magnetic foreign material is removed from the outlet portion. Raw resin None As carried out to the next process, if the operation of the processing line has stopped, the raw material resin of the collecting pipe body including the outlet portion was突成obliquely upward to the upper side surface of the collecting tube body An apparatus for removing a magnetic foreign substance in a raw material resin, wherein the apparatus is configured to drop by its own weight into a lower raw material resin supply source.   The magnet bar is composed of a magnet body portion in which a large number of magnet elements are laminated in a stainless steel cylindrical case, and a solid stainless steel head portion formed in the upper recess of the cylindrical case. 2. The apparatus for removing magnetic foreign substances in a raw material resin according to claim 1, wherein the apparatus is formed in a shape.

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