JP5448935B2 - Spinning pack - Google Patents

Description

  The present invention relates to a spin pack, and more particularly to a construction technology of the packing.

  2. Description of the Related Art Conventionally, a technique of a melt spinning apparatus in which a thermoplastic resin (polymer) melted at a high temperature is extruded from a thin nozzle and wound into a yarn while being cooled is known. Also known is a spinning pack that is attached to a heating box of a melt spinning apparatus, filters and rectifies a high-temperature and high-pressure polymer, and discharges the filtered and rectified polymer from a number of spinning holes.

  The spin pack main body is configured to be removable from a connecting member attached to a spin block, which is a heating box, in order to perform maintenance such as cleaning the inside of the spin pack main body. In addition, the spin pack body is attached to the connecting member via a packing in order to allow the polymer flow path formed in the connecting member and the polymer flow path formed in the spin pack main body to communicate without leakage (for example, Patent Documents). 1).

  In recent years, in order to improve the productivity of the melt spinning apparatus, a spinning pack having a plurality of polymer flow paths formed therein has been used. In such a spin pack in which a plurality of polymer flow paths are formed, conventionally, the packing interposed between the connecting member and the spin pack body has been individually arranged with respect to the plurality of polymer flow paths.

  However, there is a dimensional error in each packing, and there is also a dimensional error in the packing installation portion on the connecting member side or the spinning pack main body side. Due to these dimensional errors, when the spin pack body is attached to the connecting member, a difference in tightening force occurs between the packings of the respective polymer flow paths, and the sealing performance between the connecting member and the spin pack body decreases. In addition, polymer leakage may occur.

Japanese Patent Laid-Open No. 9-41215

  The problem to be solved by the present invention is to provide a spinning pack capable of reducing polymer leakage due to dimensional errors in packing and packing installation portions.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

A first invention is a spinning pack attached to a heating box of a melt spinning apparatus, wherein a plurality of polymer flow paths are formed therein, a connecting member attached to the heating box, and a plurality of polymer flow paths A lid member that is formed inside and disposed below the coupling member, and a plurality of polymer holes that are disposed between the lid member and the coupling member and communicate with the respective polymer flow paths are formed. The lid member is screwed together by tightening the lid member circumferentially and upward with respect to the connecting member, the lid member is attached to the connecting member, and contacts the packing of the connecting member A groove is formed around the opening of the polymer channel on the surface, and a direction parallel to the polymer channel of the connecting member and the lid member is an axial direction, and rotation around the axial direction is a circumferential direction. The packing includes a detent means for restricting rotation in the circumferential direction, and the concave portion of the lid member has a position of a polymer flow path of the coupling member when attached to the coupling member, and the lid member A positioning member is provided so as to match the position of the polymer flow path .

According to a second invention, in the first invention, a packing engaging portion is formed on a surface of the lid member on which the packing is arranged, and the packing is arranged on the packing engaging portion .

According to a third invention, in the first or second invention, the outline of the packing is circular, and a packing engaging portion is formed on a surface of the lid member on which the packing is disposed, and the packing A pin engaging part is formed in the engaging part, and a pin hole penetrating the packing is formed in the packing, and by engaging a pin with the pin engaging part and the pin hole, The packing is engaged with the lid member .

  According to the spinning pack of the present invention, it is possible to reduce polymer leaks due to packing dimensional errors and packing installation processing errors.

The schematic diagram which shows the whole structure of a melt spinning apparatus provided with the spinning pack which concerns on one Embodiment of this invention. (A) Sectional drawing which similarly shows the whole structure of a spinning pack, (B) Plan view. (A) Sectional drawing which similarly shows arrangement | positioning of packing of a spin pack, (B) Sectional drawing from another angle similarly. (A) The top view which similarly shows the packing of a spinning pack, (B) Similarly sectional drawing. (A) Sectional drawing which similarly shows the connection member of a spinning pack, (B) Bottom view similarly. (A) Sectional drawing which shows arrangement | positioning of packing of the spinning pack which concerns on another embodiment, (B) Sectional drawing from another angle similarly. (A) The top view which similarly shows packing, (B) It is sectional drawing. (A) The top view which shows the packing of the spinning pack which concerns on another embodiment, (B) It is sectional drawing similarly.

A melt spinning apparatus 50 including a spinning pack 10 according to an embodiment of the present invention will be described with reference to FIG.
The melt spinning apparatus 50 is an apparatus that extrudes a thermoplastic resin (polymer) melted at a high temperature from a thin nozzle, winds it while cooling, and forms it into a yarn. There are two types of melt spinning apparatuses: a POY spinning apparatus for winding POY (partially drawn yarn) and an FDY spinning apparatus for winding FDY (full drawn yarn). The spinning pack 10 according to the present invention can be applied to either a POY spinning device or an FDY spinning device, but this embodiment will be described as an FDY spinning device.

  The melt spinning apparatus 50 includes a hopper 1 for feeding polymer chips dried at a high temperature, an extruder 2 for melting the polymer chips to a spinnable viscosity and ejecting them at a high pressure, and a spin block to describe the ejected molten polymer later. 4, a polymer pipe 3 that feeds up to 4, a heating medium enclosed therein, a spin block 4 as a heating box provided with a gear pump (not shown) as a quantitative supply means, and heating that is mounted on the spin block 4 and is supplied quantitatively by the gear pump And a spin pack 10 for filtering and rectifying the filtered polymer and discharging the filtered and rectified polymer at a high pressure.

  Further, the melt spinning device 50 reduces friction between the cooling chimney 5 that cools the yarn Y spun from the spinning pack 10 with a cooling pipe, a guide, and the like, and provides prevention of electrification and flexibility. An oil supply guide 6 for supplying an oil agent to the yarn Y, an entanglement nozzle 7 that causes an appropriate disturbance in the flow of the yarn Y in order to make the oil agent applied to the yarn Y uniform, and a direction of the yarn Y are changed. A first roll 8a and a second roll 8b, and a winder 9 for winding the yarn Y as an undrawn yarn are provided.

The spinning pack 10 will be described with reference to FIGS. 2 and 3. 2B indicates the axial direction of the spin pack 10 and the components of the spin pack 10, and the direction of the arrow Z is upward. In addition, an arrow X in FIG. 2A indicates the circumferential direction of the spinning pack 10 and the components of the spinning pack 10.
3A is a cross-sectional view of the spin pack 10 taken along the line AA in FIG. 2A, and FIG. 3B is a cross-sectional view of FIG. ) Is a cross-sectional view taken along the line BB in FIG.

  The spin pack 10 includes a connecting member 20 and a spin pack body 40. The spinning pack main body 40 is configured to be removable from the connecting member 20 in order to perform maintenance such as cleaning the inside thereof. The packing 60 is replaced as a consumable item every time the spinning pack main body 40 is maintained. The connecting member 20 connects the spin block 4 and the spin pack body 40 and is attached to the spin block 4 in advance using bolts (not shown). The connecting member 20 is formed with a convex portion 21 facing downward, two polymer channels 20A and 20B are formed in the axial direction inside the connecting member 20, and a male screw portion around the convex portion 21. Is formed.

  The spin pack main body 40 is attached to the connecting member 20 via a packing 60, and includes a lid member 30, a retainer 42, and a spinneret 43 inside a cylindrical outer shell 41.

  The lid member 30 is arranged on the uppermost part of the spin pack main body 40, and two polymer flow paths 30A and 30B communicating with the polymer flow paths 20A and 20B of the connecting member 20 described above are formed in the axial direction of the inside. It is what is done. A recess 31 is formed on the top surface of the lid member 30, and a groove-shaped engagement portion 32 is formed on the bottom surface 31 </ b> L of the recess 31 as a packing installation portion on which the packing 60 is disposed. A female screw portion is formed on the side surface of the recess 31. The retainer 42 is disposed below the lid member 30, and polymer channels 42A and 42B communicating with the polymer channels 30A and 30B are formed in the axial direction of the retainer 42. The polymer channel In the middle of 42A and 42B, a filter medium, a filter, etc. are provided. The spinneret 43 is disposed below the retainer 42, and is formed with a spinning hole group (not shown) communicating with each of the flow paths 42A and 42B.

Then, the structure of the packing 60 and the structure of the connection member 20 and the cover member 30 which contact the packing 60 are demonstrated.
As shown in FIG. 4, the packing 60 has an oblong shape as an anti-rotation means in a plan view in the axial direction of the spin pack 10, and when the packing 60 is engaged with the engaging portion 32, Polymer holes 60A and 60B are formed in the axial direction so as to communicate with the polymer flow paths 30A and 30B of the member 30, respectively. The packing 60 of this embodiment is made of aluminum, and packings 70 and 80 described later are also made of aluminum. The details of the anti-rotation means will be described later.

  The inner peripheral contour of the engaging portion 32 of the lid member 30 is formed in the same oval shape as the axial contour of the packing 60, and the axial depth of the engaging portion 32 is greater than the axial height of the packing 60. Is also considered low.

  As shown in FIG. 5, the openings of the polymer flow paths 20A and 20B are spaced from the edges of the openings of the polymer flow paths 20A and 20B around the polymer flow paths 20A and 20B on the bottom surface 20L of the connecting member 20. A groove 22 is formed so as to border the portion. The groove 22 is formed in a V shape in a sectional view in the forming direction. In addition, the cross-sectional shape of the formation direction of the groove | channel 22 is not limited to V shape, A concave shape may be sufficient.

Subsequently, attachment of the packing 60 will be described.
When attaching the spin pack main body 40 to the connecting member 20, the packing 60 is engaged with the engaging portion 32 and disposed on the lid member 30 to restrict the circumferential displacement of the packing 60 with respect to the spin pack main body 40. Then, by tightening the spin pack body 40 circumferentially and upward with respect to the connecting member 20, the concave portion 31 is screwed to the convex portion 21, and the spin pack main body 40 is attached to the connecting member 20. In addition, the position of the polymer flow paths 20A and 20B of the connection member 20 matches the position of the polymer flow paths 30A and 30B of the lid member 30 when the recess 31 of the spin pack body 40 is attached to the connection member 20. Thus, a positioning member (not shown) is provided.

  When the spinning pack body 40 is attached to the connecting member 20, the upper surface of the packing 60 is in close contact with the bottom surface 20L of the connecting member 20, the bottom surface of the packing 60 is in close contact with the bottom surface 32L of the engaging portion 32 of the lid member 30, and the polymer hole 60A. 60B communicates with the respective polymer flow paths 20A and 20B and the polymer flow paths 30A and 30B.

By adopting such a configuration, the following effects can be obtained.
Conventionally, in a spin pack in which two polymer flow paths are formed, one packing, that is, a total of two, is disposed for each polymer flow path between the connecting member and the spin pack body. It was. However, by using two packings, the product dimensional error of the packing and the packing installation part is double the number of packings, and the sealing performance between the connecting member and the spinning pack body in the spinning pack is reduced. Was.

  According to the spin pack 10 of the present embodiment, by using one packing 60 in which two polymer holes 60A and 60B communicating with the two polymer flow paths 20A and 20B (30A and 30B) are formed, The cause of the dimensional error of the packing 60 and the engaging portion 32 as the packing installing portion can be reduced, and the polymer leak due to the dimensional error of the packing 60 and the engaging portion 32 can be reduced.

  Further, when the spin pack main body 40 is attached to the connecting member 20, the grooves 22 are formed around the openings of the polymer flow paths 20A and 20B on the bottom surface 20L of the connecting member 20, so that the top surface and the bottom surface 20L of the packing 60 are formed. Is smaller than the case where the bottom surface 20L is flat, and the tightening force required when tightening the spin pack body 40 is less than that when the bottom surface 20L is flat. It is done.

  Furthermore, when the spin pack body 40 is attached to the connecting member 20, the packing 60 is fixed to the spin pack main body 40 in the circumferential direction by a detent means, so that the two polymer flow paths 20A and 20B (30A and 30B) are fixed. ) And the polymer holes 60A and 60B of the packing 60 are not necessary.

  Here, the detent means is means for restricting the circumferential rotation of the packing 60 when the packing 60 is rotated in the circumferential direction with respect to the engaging portion 32, and rotates the packing 60 in the circumferential direction. When it is made to contact, it is in contact with any surface of the engaging portion 32, and the packing 60 is a portion where it cannot move (rotate) in the circumferential direction any more. That is, the detent means of the packing 60 has a contour formed in an oval shape.

For example, in a packing in which a contour is formed in a circular shape and a protrusion is formed around the protrusion, the protrusion serves as a detent means. In addition, the engaging part 32 shall be formed with the engaging part of a projection part.
Further, in the packing in which the contour is formed in a circular shape and the protrusion is formed at the bottom, the protrusion serves as a detent means. In addition, the engaging part 32 shall be formed with the engaging part of a projection part.
Furthermore, the packing contour oval is formed, the stop means about the formation contours in an oval shape.

The arrangement of the delta packing 70 according to another embodiment will be described with reference to FIG.
6A shows a cross-sectional view of the spin pack 10 corresponding to the AA cross section in FIG. 2A, and FIG. 6B shows FIG. 2A in which the cross section of FIG. ) Is a cross-sectional view corresponding to the BB cross section in FIG.
About the convex part 21 and the recessed part 31, since it is the same as that of the structure mentioned above, description is abbreviate | omitted. The lid member 30 has a groove-shaped engagement portion 32 formed on the bottom surface 31L of the recess 31, and the contour of the inner periphery of the engagement portion 32 is the same circle as the contour in a sectional view in the axial direction of a delta packing 70 described later. It is made into a shape. The engaging portion 32 is formed with two pin engaging portions 33 at positions corresponding to pin holes 71 and 71 of a delta packing 70 described later.

The delta packing 70 will be described with reference to FIG.
The delta packing 70 is formed in a circular shape when viewed in a plan view in the axial direction, and has a shape in which a rectangular corner is cut off with a straight line when viewed in a cross section parallel to the axial direction. Further, the delta packing 70 is formed with polymer holes 70A and 70B penetrating therethrough so as to communicate with the polymer flow paths 30A and 30B of the lid member 30 when the delta packing 70 is engaged with the engaging portion 32, Between the polymer holes 70A and 70B, pin holes 71 and 71 are formed penetrating symmetrically with respect to the center line L of the polymer holes 70A and 70B. The pin holes 71 and 71 need only be formed in two locations symmetrically with respect to the center line L of the polymer holes 70A and 70B in the delta packing 70, and the positions where the pin holes 71 and 71 are formed are limited to the present embodiment. Never happen.

Here, attachment of the delta packing 70 will be described.
When attaching the spin pack main body 40 to the connecting member 20, the delta packing 70 is engaged with the engaging portion 32 and disposed on the lid member 30, and the pin 90 is engaged with the pin engaging portion 33 and the pin hole 71. The circumferential displacement of the delta packing 70 relative to the spin pack body 40 is restricted. Then, by tightening the spin pack body 40 circumferentially and upward with respect to the connecting member 20, the concave portion 31 is screwed to the convex portion 21, and the spin pack main body 40 is attached to the connecting member 20.

By adopting such a configuration, the following effects can be obtained.
That is, like the packing 60, by using one delta packing 70 in which two polymer holes 70A and 70B communicating with the two polymer flow paths 20A and 20B (30A and 30B) are formed, the delta packing 70 is used. In addition, it is possible to reduce the generation factor of the dimensional error of the engaging portion 32 as the packing installation portion.
Moreover, since the delta packing 70 can be manufactured from a general-purpose high cylindrical aluminum die-casting or the like by making the outline of the delta packing 70 circular, the production cost of the delta packing 70 can be reduced.
Further, since the polymer holes 70A and 70B and the pin holes 71 and 71 are all through-holes, the hole can be easily processed, so that the production cost of the delta packing 70 can be reduced.

  Further, since the pin holes 71 and 71 are formed at two locations symmetrically with respect to the center line L of the polymer holes 70A and 70B in the delta packing 70, the pin holes 71 and 71 are attached to the spin pack 10 and when the high-pressure polymer passes. Even if it exists, it will deform | transform uniformly and will not impair sealing performance.

The packing 80 which is another embodiment is demonstrated using FIG.
The delta packing 80 has a shape in which a corner having a rectangular outline is cut out with a straight line in a cross-sectional view parallel to the axial direction, and the cut-out portion extends to the openings of the polymer holes 80A and 80B. It is composed. Other configurations including the pin hole 81 are the same as those of the delta packing 70 described above.

DESCRIPTION OF SYMBOLS 10 Spin pack 20 Connecting member 20A Polymer flow path 20B Polymer flow path 30 Lid member 30A Polymer flow path 30B Polymer flow path 40 Spin pack main body 50 Melt spinning apparatus 60 Packing 70 Delta packing 80 Delta packing

Claims (3)

A spinning pack attached to a heating box of a melt spinning apparatus,
A plurality of polymer flow paths are formed inside, and a connecting member attached to the heating box,
A plurality of polymer flow paths formed therein, a lid member disposed below the connecting member;
A packing disposed between the lid member and the connecting member, in which a plurality of polymer holes communicating with the respective polymer flow paths are formed;
Equipped with,
The lid member is screwed to the connecting member by tightening it in the circumferential direction and upward, and the lid member is attached to the connecting member,
A groove is formed around the opening of the polymer channel on the surface of the connecting member that contacts the packing,
When the direction parallel to the polymer flow path of the connecting member and the lid member is the axial direction, and the rotation around the axial direction is the circumferential direction,
The packing includes a detent means for restricting rotation in the circumferential direction,
A positioning member is provided in the concave portion of the lid member so that the position of the polymer flow path of the connecting member matches the position of the polymer flow path of the lid member when attached to the connecting member.
Spinning pack. The spinning pack according to claim 1, wherein
A packing engaging portion is formed on the surface of the lid member on which the packing is disposed,
The spinning pack , wherein the packing is disposed in the packing engaging portion . The spin pack according to claim 1 or 2,
The outline of the packing is circular,
A packing engaging portion is formed on the surface of the lid member on which the packing is disposed,
A pin engaging part is formed in the packing engaging part,
The packing is formed with a pin hole penetrating the packing,
A spinning pack in which the packing is engaged with the lid member by engaging a pin with the pin engaging portion and the pin hole .

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