GB2158005A - Meltblowing polymer distribution apparatus - Google Patents

Meltblowing polymer distribution apparatus Download PDF

Info

Publication number
GB2158005A
GB2158005A GB08510371A GB8510371A GB2158005A GB 2158005 A GB2158005 A GB 2158005A GB 08510371 A GB08510371 A GB 08510371A GB 8510371 A GB8510371 A GB 8510371A GB 2158005 A GB2158005 A GB 2158005A
Authority
GB
United Kingdom
Prior art keywords
die tip
molten polymer
distributor block
endless
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08510371A
Other versions
GB8510371D0 (en
Inventor
Adrian Dionysius Drost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kimberly Clark Corp
Original Assignee
Kimberly Clark Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kimberly Clark Corp filed Critical Kimberly Clark Corp
Publication of GB8510371D0 publication Critical patent/GB8510371D0/en
Publication of GB2158005A publication Critical patent/GB2158005A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/08—Supporting spinnerettes or other parts of spinnerette packs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0881—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by plastic deformation of the packing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

An improved sealing system is provided in apparatus comprising a distributor block (12), a die tip (11) and therebetween a sealing means (24), said die tip having a centrally located molten polymer channel (14) and a surface mounted in mating abuttment with a mounting surface of said distributor block having a centrally disposed distributor cavity (13), said cavity communicating with said molten polymer channel at a juncture formed by the mounting surfaces of said die tip and said distributor block to define a molten polymer flow passage and said passage communicating with at least one extrusion aperture (16) wherein said apparatus is provided with means (30) for precisely locating the respective mounting surfaces of said die tip and said distributor block, wherein an endless groove (22, 23) surrounding said passage is formed in each of said mounting surfaces, and wherein said sealing means comprises an endless ribbon-shaped sealing member having its narrow edge portions inserted in each of said endless grooves thereby to form an extrusion pressure-tight seal. <IMAGE>

Description

SPECIFICATION Meltblowing polymer distribution apparatus Technical field The present invention relates to meltblowing polymer distribution apparatus having a sealing system between component parts in the meltblowing polymer distribution system. More particularly, the present invention relates to apparatus having an improved sealing system for surfaces mating with a die tip in which the possibility of polymer leakage between the mating surfaces exists.
Background art Commonly employed melt-blowing dies employ a die or die tip mounted on a distributor block. In some instances, interposed between the die and the distributor block, or forming part of the die, is a filter and possibly a retainer for the filter. The die tip is provided with minute orifices through which molten polymeric material is extruded. The molten polymeric material is supplied to the orifices from a distributor cavity formed in the distributor block, which cavity communicates with a channel formed in the die tip extending from the mounting face of the die tip in mating contact with the distributor block to the orifices in the die tip. The molten polymeric material, generally thermoplastic, is forced through the distributor system to the orifices by application of high pressure.The obviate seepage from between the mating surfaces throughout the system which are exposed to the outwardly directed pressure of the molten thermoplastic material, particularly the mounting faces of the die tip and the distributor block, flat seals, such as washers or gaskets, generally formed from aluminium or copper, have been employed. Such seals are placed between the mounting surfaces with the widest planar surfaces of the seal in contact with each of the mounting surfaces. The parts of the die assembly, i.e. the distributor block and the die tip, are assembled by means of bolts torqued to provide high bolt loadings.
In many instances, because of the very high extrusion pressures employed, to provide the necessary sealing, the bolts must be subjected to torque loading which exceeds the strength of the bolts.
Thus, heretofore, the extrusion pressure which could practically be attained with such apparatus was limited by the strength of the assembling bolts used therein.
Disclosure of invention In one aspect the invention provides a meltblowing polymer distribution apparatus comprising a distributor block, a die tip and therebetween a sealing means, said die tip having a centrally located molten polymer channel and a surface mounted in mating abuttmentwith a mounting surface of said distributor block having a centrally disposed distributor cavity, said cavity communicating with said molten polymer channel at a juncture formed by the mounting surfaces of said die tip and said distributor block to define a molten polymer flow passage having a central axis, and said passage communicating with at least one extrusion aperture at the extrusion surface of said die tip;;wherein said apparatus is provided with means for precisely locating the respective mounting surfaces of said die tip and said distributor block, wherein an endless groove surrounding said passage is formed in each of said mounting surfaces, and wherein said sealing means comprises an endless ribbon-shaped sealing member having its narrow edge portions inserted in each of said endless grooves thereby to form an extrusion pressure-tight seal.
The present invention provides a sealing system which may be used in a melt blowing polymer distribution system particularly between the mounting faces of a distributor block and a die tip, which permits very high polymer extrusion pressures, potentially well in excess of these presently employed in conventional melt blown and Coform die tips and distributor blocks. Such results may be obtained while using very low bulk loadings. The higher extrusion pressures permitted by the present invention result in much higher throughput limits.
The improved sealing capability of the sealing system of the present invention is provided by an endless, ribbon-shaped sealing member, conveniently of aluminium, having its two narrow edge portions inserted into endless grooves formed in each of the mating surfaces of the die tip and distributor block. The endless grooves are arranged concentrically with respect to a molten polymer fluid passage defined by a centrally disposed cavity in the distributor block which communicates with a molten polymer channel in the die tip. This arrangement of the endless, ribbon-shaped sealing member within the endless grooves in the surfaces of the mating components permits interaction between the molten polymeric material, under pressure, to increase the sealing capability of the system and provide an extrusion-pressure-tight seal.
Preferred embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which Figure lis a schematic view of a melt blown extrusion die body including a distributor block, a die tip and the sealing system according to the present invention; Figure 2is a detailed schematic illustration of the sealing system shown in Figure 1 interposed between a die tip and a distributor block; Figure 3a and3billustrate a plan and sectional view, respectively, of an embodiment of a locating means used in conjunction with a sealing system according to the present invention; Figure 4is a sectional view of an embodiment of the sealing system and locating means used with a filter plate retainer and a distributor block; and Figure 5illustrates in section a sealing member in place in grooves formed in two mating surfaces.
As employed herein, the terms "upper" and "lower" are used to describe relative positions when the die assembly is mounted such that a distributor block is arranged above a die tip with a centrally disposed molten polymer flow passage passing therebetween having an axis arranged with a vertical orientation. However, this axis may have any other orientation with the component parts of the die assembly assuming corresponding positions.
As shown in Figure 1, a die assembly 10 includes a die tip 11 mounted on a distributor block 12. The die tip may be secured to the distributor block by any conventional means, such as clamps or, as commonly used, bolts. The clamps or bolts do not provide sealing pressure but merely support or maintain the mounting surfaces of the die tip and distributor block in mating contact. The material to be extruded enters the top of the distributor block 12 through an opening, such as inlet 40 shown at the upper portion of the distributor block in Figure 1. The extrusion material, which is rendered molten by any conveniently placed heating means, passes through a centrally disposed cavity 13 formed in the distributor block which communicates with inlet 40.In the particular embodiment illustrated in Figure 1, and shown in greater detail in Figure 2, the lower end of the cavity 13 flares toward the base or mounting surface of the block which contacts the die tip 11.
Placed or incorporated centrally within the die tip and communicating with the central cavity 13 is a molten polymer duct or channel 14. This channel extends from the upper portion or mounting surface of the die tip which contacts the distributor block to extrusion apertures 16 at the lower or extrusion surface of the die tip. The cavity 13 and channel 14 define, in combination, a molten polymer flow passage.
In the embodiments shown in Figures 2 and 4, means for filtering the molten polymer is included in the die tip 11. As shown in Figure 2, the filtering means or assembly is incorporated within a flared portion of the molten polymer channel 14, providing fluid communication betwen upper and lower portions thereof. Although the filtering means may take any ann suitable form, the known and illustrated embodi- ment includes a filter 17 placed on a filter plate 18 which in turn is held by filter plate retainer 19. In embodiments of the present invention in which no filter means is included, the upper surface of the die tip forms a mounting surface 41 (Figure 5) which mates with the lower or mounting surface 42 of the distributor block.In embodiments which include a filtering means in the die tip, such as the embodi ment illustrated in Figure 2, the portion of the die tip which forms the filter plate retainer has an upper surface which forms the mounting surface of the die tip and which is placed in mating contact with the mounting surface of the distributor block. An alter nate embodiment is shown in Figure 4 in which an adapter is incorporated into the lower portion of the distributor block to form a mounting surface which mates with the mounting surface formed in the upper surface of the filter assembly or in the die tip itself.
The die tip which is illustrated also includes channels 20 for directing heated inert gas, such as air to the polymer stream extruded from orifice 16. Air guides 21 may also be provided to adjust the width of the outlets from the air supply channels 20.
The molten plastic material which flows through the molten polymer flow passage defined by cavity 13 and channel 14 is forced through orifice 16 under very high pressure. The improvement provided by the present invention obviates leakage from junctions formed between any two sections of the die assembly which are exposed to the high pressure flow of plastic material, such as the mating surfaces of the distributor block and the die tip. As shown in Figures 2,4 and 5, endless or continuous grooves 22 and 23 are formed concentrically with respect to the molten polymer flow passage in the mounting surfaces of the distributor block or adapter and the die tip, or filter plate retainer, respectively. The grooves may have a generally "V" shaped configuration, as in groove 22, or a generally "U" shaped configuration, as in groove 23, as shown in the embodiment illustrated in Figure 4.Placed within the endless grooves 22 and 23 is an endless ribbonshaped sealing member. The sealing member is formed, preferably, from aluminum which provides an optimum coefficient of expansion in a heated steel distribution assembly. The ribbon-shaped sealing member has a rectangular cross section. Unlike conventional sealing members in which the longer cross sectional dimensions are oriented parallel to the mating surfaces or perpendicular to the central axis of the molten polymer flow passage, the seal of the present invention 24, having narrow edge portions 25 and wide edge portions 26, is placed within the grooves 22 and 23 such that the narrower edge portions 25 of the rectangular cross section are oriented perpendicular to the central axis of the molten polymer flow passage (as shown in Figure 5).
The edges 26 of the annular sealing member 24, i.e.
those edges having the longer cross sectional dimension, may be designated as "inner" 26a or "outer" 26b edges with respect to their proximity to the molten polymerflow passage. Thus, the inner edge or surface 26a is closest to the polymer flow conduit while the outer edge or surface 26b is more remote from the flow conduit.
As discussed above, the groove into which the sealing member is placed preferably has a V-shape as with groove 22 or a U-shape as with groove 23 (Figures 2,4). The designation of grooves as being U-shaped is not intended to suggest that any portion of the groove which contacts the sealing member is curvilinear. Preferably the groove is formed by planar surfaces which enclose angles equal to or greater than 90 degrees. The surfaces of the Vshaped groove also preferably form an angle of approximately 90 degrees with respect to each other. The type of groove used in the mating surfaces may be of the same type as shown in Figure 5 or two different types of grooves may be used in each ofthe mating surfaces as shown in Figures 2 and 4. No matter which type of groove is used to receive the sealing member, the narrow edges of the seal should preferably contact the bottom of each groove while the outer surface or edge 26b contacts at least a portion of the outer surfaces 27 and 28 of each of the endless grooves which are parallel to the axis of the molten polymer flow passage.
Although both the die tip and the distributor block may be in mating contact with each other on both the inner and outer sides of the sealing member, it is more important that the mounting surfaces contact one another on the outer sides of the sealing member, that is, the side which is most remote from the molten polymer flow passage. Thus, should the molten polymeric material seep between the interface formed by the mounting surfaces of the die tip and the distributor block on the inner side of the sealing member 26a, the pressure exerted by the molten polymeric material exerts a force on the sealing member forcing it against the outer surfaces 27 and 28 of the grooves 22 and 23 and thereby increases the sealing effect of the sealing member within the grooves.The sealing effect may be improved further by providing a bevel or chamfer 29 on the outer portion of each of the grooves, as shown in FigureS. Apparently, the pressure of the molten polymeric material causes the sealing mem ber to bow slightly at its center so as to conform to the arch formed by the chamber on each of the mating surfaces.
To assure that the mounting surfaces in the vicinity of the seal are properly mated, several guides or means for locating the die head and the distributor block are formed in the mounting surfaces of the distribution assembly members. As shown in Figures 2 to 4, the locating means may take the form of ridges 30 and 31 formed in the die tip (or filter assembly which forms part of the die tip) and in the distributor block, respectively. The die tip ridge 30 has a shoulder portion 32 and the distributor block ridge 31 has a shoulder portion 33. The shoulder portions 32 and 33 may be parallel to the axis of the molten polymer flow passage but preferably have a slight incline. Both the shoulders 32 and 33 are arranged in mating contact as are, preferably, the ridge 31 and the engaging recessed or lower portion of the die tip (or filter assembly) on which the ridge 31 is superposed.A plan view of the locating means formed as a ridge on a die tip is shown in Figure 3a. A set of four interengaging locating means placed symmetrically and equiangularly around the molten polymer flow conduit are quite suitable although more locating means may be employed. Preferably, the ridges have a rectangular shape in which the length of the ridge is generally about 6 to about 8 times as long as the width of the ridge.
As shown, in Figure 5, bolts are employed to secure the die tip to the distributor block. It is not intended that these bolts be torqued with high bolt loading to effect or improve sealing of mating surfaces. Rather, these bolts are used to support and join the component parts. In the sealing system of the present invention, adequate sealing is provided almost entirely by the endless grooves formed in the mounting surface, the endless, ribbon-shaped sea ling member, and the locating means formed in the mounting surfaces.
The endless, ribbon-shaped sealing member and the endless grooves which are commensurate in shape to the sealing member and are placed in concentric spaced relation to the molten polymer flow passage preferably have an annular or general ly round configuration. However, the endless sealing member and corresponding grooves may also have a generally elliptical, square or rectangular configuration as well. The sealing member may also have a configuration which departs from a regular shape, being provided with suitable bent or contoured regions to accomodate bolts or clamps which may pass between the die tip and distributor block.
Although the foregoing discussion has been directed primarily to the use of such a sealing system between the die tip and the distributor block of a melt-blowing polymer distribution system, it should be understood that the sealing system of the present invention may be employed between any two mating surfaces where the potential for leakage exists from fluid materials, particularly molten polymeric materials, under very high pressures.
Thus in a further aspect the invention provides a pressurized fluid transfer apparatus having at least two abutting conduit elements each with a fluid conduit extending therethrough, having formed in the opposed abutting surfaces of adjacent said elements endless grooves surrounding the fluid conduit defined by said adjacent elements, having locating means for locating said grooves in abutting surfaces in opposed facing relationship, and having an endless ribbon sealing member with the edges thereof disposed in opposed said grooves.

Claims (8)

1. A melt-blowing polymer distribution apparatus comprising a distributor block, a die tip and therebetween a sealing means, said die tip having a centrally located molten polymer channel and a surface mounted in mating abuttment with a mounting surface of said distributor block having a centrally disposed distributor cavity, said cavity communicating with said molten polymer channel at a juncture formed by the mounting surfaces of said die tip and said distributor block to define a molten polymer flow passage having a central axis, and said passage communicating with at least one extrusion aperture at the extrusion surface of said die tip; wherein said apparatus is provided with means for precisely locating the respective mounting surfaces of said die tip and said distributor block, wherein an endless groove surrounding said passage is formed in each of said mounting surfaces, and wherein said sealing means comprises an endless ribbon-shaped sealing member having its narrow edge portions inserted in each of said endless grooves thereby to form an extrusion pressure-tight seal.
2. Apparatus as claimed in Claim 1 wherein said sealing member has a rectangular cross section and is orientated with its longer cross-sectional dimension substantially parallel to the axis of said molten polymer flow passage.
3. Apparatus as claimed in Claim 2 wherein at least a portion of each of said endless grooves is parallel to the axis of said molten polymer flow passage and wherein said sealing member has an inner surface and an outer surface and at least a portion of said outer surface contacts a portion of each of said endless grooves which is parallel to the axis of said molten polymer flow passage.
4. Apparatus as claimed in any one of Claims 1 to 3 wherein said locating means comprise abutting shoulders formed in the mounting surfaces of said die tip and said distributor block.
5. Apparatus as claimed in any one of Claims 1 to 4 wherein said die tip includes a means for filtering molten polymer, which means are provided in said molten polymer channel and form the mounting surface of said die tip.
6. Apparatus as claimed in any one of Claims 1 to 5 wherein said ribbon-shaped sealing member is of aluminium.
7. A melt blowing polymer distribution apparatus substantially as herein described with reference to the accompanying drawings.
8. Pressurized fluid transfer apparatus having at least two abutting conduit elements each with a fluid conduit extending therethrough, having formed in the opposed abutting surfaces of adjacent said elements endless grooves surrounding the fluid conduit defined by said adjacent elements, having locating means for locating said grooves in abutting surfaces in opposed facing relationship, and having an endless ribbon sealing member with the edges thereof disposed in opposed said grooves.
GB08510371A 1984-04-25 1985-04-24 Meltblowing polymer distribution apparatus Withdrawn GB2158005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60386884A 1984-04-25 1984-04-25

Publications (2)

Publication Number Publication Date
GB8510371D0 GB8510371D0 (en) 1985-05-30
GB2158005A true GB2158005A (en) 1985-11-06

Family

ID=24417252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08510371A Withdrawn GB2158005A (en) 1984-04-25 1985-04-24 Meltblowing polymer distribution apparatus

Country Status (5)

Country Link
JP (1) JPS60239221A (en)
KR (1) KR850007407A (en)
AU (1) AU4160885A (en)
GB (1) GB2158005A (en)
ZA (1) ZA853033B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087186A (en) * 1987-11-20 1992-02-11 Accurate Products Co. Meltblowing apparatus
WO1993015895A1 (en) * 1992-02-13 1993-08-19 Accurate Products Co. Meltblowing die having presettable air-gap and set-back
US5269670A (en) * 1990-10-17 1993-12-14 Exxon Chemical Patents Inc. Meltblowing die

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB935745A (en) * 1959-12-18 1963-09-04 Karl Marx Stadt Ind Werke Improvements relating to the joining and sealing of hollow members
GB1124160A (en) * 1966-01-11 1968-08-21 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
GB1212767A (en) * 1967-03-30 1970-11-18 Dev Des Ind Modernes S E D I M Improvements in or relating to "leak-proof devices for connecting similar pipes and hoses"
GB1251286A (en) * 1968-06-21 1971-10-27
GB1291966A (en) * 1970-04-08 1972-10-04 Akzo Nv A melt spinning assembly
GB1407684A (en) * 1972-10-19 1975-09-24 Sperry Rand Ltd Fluid-tight seals and method of making them
GB1417092A (en) * 1972-01-11 1975-12-10 Bopp & Reuther Gmbh Seals for flanged joints
GB2115084A (en) * 1981-12-23 1983-09-01 Plessey Co Plc A method of sealing a joint
US4408771A (en) * 1982-12-09 1983-10-11 Acf Industries, Incorporated High pressure sealing connection with metal seal
GB2129505A (en) * 1982-10-29 1984-05-16 Pressure Science Inc A torsionally flexible annular seal

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB935745A (en) * 1959-12-18 1963-09-04 Karl Marx Stadt Ind Werke Improvements relating to the joining and sealing of hollow members
GB1124160A (en) * 1966-01-11 1968-08-21 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
GB1212767A (en) * 1967-03-30 1970-11-18 Dev Des Ind Modernes S E D I M Improvements in or relating to "leak-proof devices for connecting similar pipes and hoses"
GB1251286A (en) * 1968-06-21 1971-10-27
GB1291966A (en) * 1970-04-08 1972-10-04 Akzo Nv A melt spinning assembly
GB1417092A (en) * 1972-01-11 1975-12-10 Bopp & Reuther Gmbh Seals for flanged joints
GB1407684A (en) * 1972-10-19 1975-09-24 Sperry Rand Ltd Fluid-tight seals and method of making them
GB2115084A (en) * 1981-12-23 1983-09-01 Plessey Co Plc A method of sealing a joint
GB2129505A (en) * 1982-10-29 1984-05-16 Pressure Science Inc A torsionally flexible annular seal
US4408771A (en) * 1982-12-09 1983-10-11 Acf Industries, Incorporated High pressure sealing connection with metal seal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087186A (en) * 1987-11-20 1992-02-11 Accurate Products Co. Meltblowing apparatus
US5269670A (en) * 1990-10-17 1993-12-14 Exxon Chemical Patents Inc. Meltblowing die
US5445509A (en) * 1990-10-17 1995-08-29 J & M Laboratories, Inc. Meltblowing die
US5605706A (en) * 1990-10-17 1997-02-25 Exxon Chemical Patents Inc. Meltblowing die
WO1993015895A1 (en) * 1992-02-13 1993-08-19 Accurate Products Co. Meltblowing die having presettable air-gap and set-back
US5580581A (en) * 1992-02-13 1996-12-03 Accurate Products Company Meltblowing die with replaceable preset die tip assembly
US5632938A (en) * 1992-02-13 1997-05-27 Accurate Products Company Meltblowing die having presettable air-gap and set-back and method of use thereof

Also Published As

Publication number Publication date
JPS60239221A (en) 1985-11-28
KR850007407A (en) 1985-12-04
ZA853033B (en) 1985-12-24
GB8510371D0 (en) 1985-05-30
AU4160885A (en) 1985-10-31

Similar Documents

Publication Publication Date Title
US5885628A (en) Injection molding nozzle
US4477055A (en) Valve seat for ball valves
US4524807A (en) Snap-together modular manifold construction
US4732414A (en) Joint for coaxial pipe
US5080569A (en) Primary air system for a melt blown die apparatus
US4533020A (en) Three-unit assembly for pneumatic circuit
KR0148376B1 (en) Melt blowing die
EP0319657B1 (en) Connection for fluids
US6200120B1 (en) Die head assembly, apparatus, and process for meltblowing a fiberforming thermoplastic polymer
KR100538658B1 (en) Connecting device for melt channel section in high temperature channel
EP0005305A1 (en) Internally heatable nozzle having a divisible housing and a divisible core
CN100449186C (en) Shut-off fitting
US4702695A (en) Housing section for a twin screw shaft machine
US4927181A (en) Apparatus and method for sealing leaks
CN1124041A (en) Jet assembly
GB2180634A (en) Tube end plates for heat exchangers
JP2989041B2 (en) Injection molding spacer member
GB2158005A (en) Meltblowing polymer distribution apparatus
KR100495526B1 (en) Spin-Die Manifold
FI3693110T3 (en) Tool system
EP0973635B1 (en) Melt guide sleeve
EP0186994B1 (en) Improved plunger assembly for glass container manufacturing
US4572521A (en) T-Seal for polymeric extrusion system
US6109592A (en) Flow control device and apparatus for mounting same
CA2248469C (en) Mould device with adjustable walls

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)