JP3177830U - Spinning pack - Google Patents

Abstract

A spinning pack that does not require the use of metal sand or glass beads is provided.
In a pack case, a rectifying plate is disposed below the introduction block, and the polymer or monomer is rectified by the rectifying plate. The rectifying plate 3 is made of closely laminated and sintered stainless fibers, and the porosity thereof is 60-70%. The stainless steel fiber has a triangular prism shape. Further, the polymer or monomer is filtered by the spinning filter 13, and the polymer or monomer is discharged from the die 14.
[Selection] Figure 1

Description

  This invention relates to a spin pack that rectifies, filters, and spins thermoplastic polymers or monomers.

  For example, as described in JP 2010-90515 A, in a spinning pack, an introduction block is usually accommodated in a pack case, and a thermoplastic polymer is introduced into the pack case through the introduction block. Further, in the pack case, the filter medium is disposed below the introduction block, and the polymer is filtered and rectified by the filter medium. Further, in the pack case, the spinning filter is disposed below the filter medium, the polymer is filtered by the spinning filter, the base is disposed below the spinning filter, and the polymer is discharged from the base. As a result, the polymer is spun. The thermoplastic monomer can be rectified, filtered and spun by a spin pack.

  In this case, the problem is maintenance of the filter media. In general, metal sand or glass beads are used for the filter medium, and the metal sand or glass beads are packed in a pack case. However, when the polymer or monomer is spun several times, the metal sand or glass beads are stained and damaged. Therefore, it is necessary to periodically replace the metal sand or glass beads, but each time it is necessary to remove the metal sand or glass beads from the pack case and then refill the metal sand or glass beads, which is easy is not. Time and effort are required. Therefore, there is a problem that the maintenance cost is high.

  Thus, alternatives to metal sand or glass beads have been studied for many years, but in the case of spin pack metal sand or glass beads, the rectifying performance is particularly important. If the polymer or monomer is not rectified, then the polymer or monomer cannot be properly spun by filtering the polymer or monomer through a spinning filter and discharging the polymer or monomer from the die. And so far, no metal sand or glass beads with comparable rectification performance have been found, and the old state is still using metal sand or glass beads and it is packed in a pack case It is.

  On the other hand, in Japanese Patent Laid-Open No. 5-253418, it is proposed to use a stainless steel fiber that is closely laminated and sintered as a filter.

  This device was developed by focusing on closely laminated and sintered stainless steel fibers and repeating research and experiments. There is no need to use metal sand or glass beads in the spinning pack, and there are no maintenance problems. The purpose is to do so.

JP 2010-90515 A JP-A-5-253418

  According to this device, the introduction block is accommodated in the pack case, and the thermoplastic polymer or monomer passes through the introduction block and is introduced into the pack case. Further, in the pack case, a rectifying plate is disposed below the introduction block, and the polymer or monomer is rectified by the rectifying plate. The baffle plate is made of closely laminated and sintered stainless fiber, and its porosity is 60-70%. The stainless steel fiber has a triangular prism shape. Further, in the pack case, the spinning filter is disposed below the current plate, the polymer or monomer is filtered by the spinning filter, the base is disposed below the spinning filter, and the polymer or monomer is discharged from the base.

  In the preferred embodiment, the current plate has a thickness of 1-2 mm. The stainless steel fiber is straight and has a length of 1-4 mm. The cross section has a substantially equilateral triangular shape, and one side has a length of 30-100 μm.

  The spinning filter is made of a stainless steel wire laminated in a nonwoven fabric shape. And in a pack case, a perforated plate is arrange | positioned between a spinning filter and a nozzle | cap | die, and a spinning filter is piled up and supported by a perforated plate.

They are the longitudinal cross-sectional view (A), the cross-sectional view (B), and perspective view (C) which show the Example of this invention. It is sectional drawing (A) and explanatory drawing (B) of the baffle plate of FIG.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 shows a spin pack according to the present invention. In this spinning pack, the introduction block 1 is accommodated in the pack case 2, and the thermoplastic polymer passes through the introduction block 1 and is introduced into the pack case 2. Further, in the pack case 2, the rectifying plate 3 is disposed below the introduction block 1, and the polymer is filtered and rectified by the rectifying plate 3. The pack case 2 includes a main body 4 and an upper lid 5, and the main body 4 has an annular seat surface 6. The rectifying plate 3 has a disk shape, is inserted into the main body 4, and engages with the annular seating surface 6.

  On the other hand, the introduction block 1 has a conical surface 7 and a cylindrical surface 8. Further, around the cylindrical surface 8, a plurality of protrusions 9 are formed at angular intervals and protrude from the cylindrical surface 8. Then, the introduction block 1 is inserted into the main body 4, and an annular gap 10 is formed between the main body 4 and the cylindrical surface 8. Further, each protrusion 9 is superimposed on the current plate 3, and the current plate 3 is sandwiched between the protrusion 9 and the annular seat surface 6. Therefore, the introduction block 1 and the current plate 3 are supported by the annular seat surface 6. Thereafter, the upper lid 5 is superimposed on the main body 4, and the main body 4 is closed by the upper lid 5.

  Further, an introduction port 11 is formed in the upper lid 4, and a polymer is sent by a gear pump and introduced from the introduction port 11. Thus, the polymer flows through the introduction block 1, along its conical surface 7, through the annular gap 10 and is introduced into the body 4. Further, the polymer passes through the rectifying plate 3, and the polymer is filtered and rectified by the rectifying plate 3.

  As shown in FIG. 2, the rectifying plate 3 is composed of stainless fibers 12 that are closely stacked and sintered. Its porosity is 60-70%. The stainless fiber 12 has a triangular prism shape. Furthermore, the current plate 3 has a thickness of 1-2 mm. The stainless steel fiber 12 is linear and has a length of 1-4 mm. The cross section is substantially an equilateral triangle, and one side has a length of 30-100 μm.

  Further, in the pack case 2, the spinning filter 13 is disposed below the rectifying plate 3, the polymer is filtered by the spinning filter 13, the base 14 is disposed below the spinning filter 13, and the polymer is discharged from the base 14. . This spins the polymer.

  The spinning filter 13 is made of a stainless steel wire laminated in a nonwoven fabric shape. Further, in the pack case 2, the perforated plate 15 is disposed between the spinning filter 13 and the base 14, and the spinning filter 13 is superimposed on and supported by the perforated plate 15. Further, an annular seat surface 16 is formed on the main body 4 of the pack case 2, and the perforated plate 15 is engaged with and supported by the annular seat surface 16. Therefore, after filtration of the polymer, it passes through the perforated plate 15 and is discharged from the base 14.

  The spinning filter 13 is the same as a conventional spinning filter. The perforated plate 15 and the base 14 are the same as the conventional perforated plate and the base.

  In the case of this spinning pack, the polymer is filtered and rectified by the rectifying plate 3, and the rectifying performance is particularly important. The inventor repeated research and experiment aiming at high rectification performance. In the experiment, first, a stainless steel fiber 12 having a triangular prism shape was used, which was closely laminated and sintered. Furthermore, the porosity was increased to 60-70%. And after rectification | straightening, when the polymer was filtered with the spinning filter 13 and the polymer was taken out from the nozzle | cap | die 14, the polymer was able to be spun correctly. Therefore, it is clear that the rectifying plate 3 has a high rectifying performance. The rectifying plate 3 has a rectifying performance comparable to that of metal sand or glass beads.

  The reason why the rectifying performance of the rectifying plate 3 is high is considered to be the porosity of 60 to 70%. Its porosity is quite high. Therefore, the polymer easily passes through the gap and collides with each stainless fiber 12. This is considered to be the reason why the rectification performance is high. Furthermore, it is considered that the stainless fiber 12 has a triangular prism shape, which is why the rectification performance is high. In the case of the triangular prism-shaped stainless fiber 12, three top edges are formed, and each top edge forms an acute angle. As a result, when colliding with the stainless steel fiber 12, it is thought that the gel is dispersed by the top edge and the polymer is easily rectified.

  Even if the porosity exceeds 70%, it is considered that there is no problem in the rectifying performance, but there is also a problem in the strength of the rectifying plate 3, and it is technically difficult to manufacture the rectifying plate 3. On the contrary, although the rectifying plate 3 having a low porosity can be manufactured, there is a problem in that the rectifying performance is impaired. However, if the porosity exceeds 60%, rectification performance is maintained thereby. Its rectifying performance is considerably high, comparable to metal sand or glass beads, and is a level worth practical use. This has already been confirmed in experiments. Therefore, in the current plate 3 in FIG. 1, the porosity is selected to be 60-70%.

  The thickness of the rectifying plate 3 is also considered to be related to the rectifying performance, but if the thickness is 1-2 mm, there is no problem in the rectifying performance. This has already been confirmed in experiments. If the thickness is 1-2 mm, it is not technically difficult to manufacture the current plate 3.

  It has already been confirmed by experiments that the stainless fiber 12 is straight and has a straightening performance of 1 to 4 mm, which has high rectification performance and no problem. It has already been experimentally confirmed that if the cross section is almost an equilateral triangle and the length of one side is 30-100 μm, the rectification performance is high and there is no problem.

  In the case of the triangular prism-like stainless fiber 12, a so-called truss is formed by the triangular cross section, and there is an advantage that a high strength can be obtained.

  Therefore, it is not necessary to use metal sand or glass beads for this spinning pack, and there is no problem with its maintenance. Like the metal sand or glass beads, it is necessary to periodically replace the rectifying plate 3, but in order to replace the rectifying plate 3, first, the main body 4 is opened by the outer lid 5. Next, the introduction block 1 is extracted from the main body 4 and removed. Thereafter, the current plate 3 is pulled out from the main body 4 and removed, and a new current plate 3 is inserted into the main body 4. Thereafter, the introduction block 1 may be inserted into the main body 4 and the main body 4 may be closed by the outer lid 5. As a result, the current plate 3 can be replaced. The work is easy. Unlike conventional spinning packs, there is no need to remove the metal sand or glass beads once and then refill the metal sand or glass beads, and no time and effort is required. Therefore, the maintenance cost is low.

  In this embodiment, the thermoplastic polymer is rectified by a spinning pack, filtered, and spun, but the thermoplastic monomer is rectified, filtered, and spun.

DESCRIPTION OF SYMBOLS 1 Introduction block 2 Pack case 3 Current plate 12 Stainless steel fiber 13 Spinning filter 14 Base 15 Perforated plate

Claims (3)

An introduction block housed in a pack case and introducing a thermoplastic polymer or monomer into the pack case;
It consists of closely laminated and sintered stainless fibers, the porosity of which is 60-70%, the stainless fibers are triangular prism-shaped, and are arranged below the introduction block in the pack case, A current plate for rectifying the polymer or monomer;
In the pack case, a spinning filter disposed below the current plate and filtering the polymer or monomer;
A spinning pack comprising a base that is disposed below the spinning filter and discharges the polymer or monomer in the pack case.   The rectifying plate has a thickness of 1-2 mm, the stainless steel fiber is linear, has a length of 1-4 mm, has a substantially equilateral triangle cross section, and has a side of 30-100 μm. The spinning pack according to claim 1.   The spinning filter is made of a stainless steel wire laminated in a nonwoven fabric shape, and in the pack case, a perforated plate is disposed between the spinning filter and a base, and the spinning filter is superposed on and supported by the perforated plate. The spinning pack according to 1.

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