UST900024I4 - Extrusion apparatus for manufacture of thermoplastic pipe - Google Patents
Extrusion apparatus for manufacture of thermoplastic pipe Download PDFInfo
- Publication number
- UST900024I4 UST900024I4 US900024DH UST900024I4 US T900024 I4 UST900024 I4 US T900024I4 US 900024D H US900024D H US 900024DH US T900024 I4 UST900024 I4 US T900024I4
- Authority
- US
- United States
- Prior art keywords
- sizing
- orifice
- manufacture
- pipe
- extrusion apparatus
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000001125 extrusion Methods 0.000 title description 3
- 229920001169 thermoplastic Polymers 0.000 title description 3
- 239000004416 thermosoftening plastic Substances 0.000 title description 3
- 238000004513 sizing Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 abstract description 2
- 239000000314 lubricant Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
Definitions
- This element is particularly characterized by presenting a smooth, cooled, rounded edge circular sizing orifice to prevent formation of defects in the outer surface of the pipe which might otherwise arise from adhesion of the molten plastic to the metal surface of the sizing orifice, or from irregularities in the surface of an unrounded orifice, thus eliminating the need for employment of any type of lubricant at the sizing orifice.
Abstract
IMPROVED APPARATUS FOR THE MANUFACTURE OF PLASTIC PIPE AND TUBING INCLUDING A FORMING DIE, A SIZING PLATES, A WATER COOLING BATH CONTAINED IN A CLOSED CHAMBER WHEREIN A PARTIAL VACUUM IS MAINTAINED, THE IMPROVEMENT WHICH CONSISTS IN PROVISION OF A HOLLOW TUBULAR COOLING ELEMENT ATTACHED TO OR UNITARY WITH THE SIZING PLTAE AROUND THE ENTIRE RIM OF THE SIZING ORIFICE TO FORM A CHAMBER THROUGH WHICH A COOLANT IS CONTINUOUSLY CIRCULATED. THIS ELEMENT IS PARTICULARLY CHARACTERIZED BY PRESENTING A SMOOTH, COOLED, ROUNDED EDGE CIRCULAR SIZING ORIFICE TO PREVENT FORMATION OF DEFECTS IN THE OUTER SURFACE OF THE PIPE WHICH MIGHT OTHERWISE ARISE FROM ADHESION OF THE MOLTEN PLASTIC TO THE METAL SURFACE OF THE SIZING ORIFICE, OR FROM IRREGULARITIES IN THE SURFACE OF AN UNROUNDED ORIFICE, THUS ELIMINATING THE NEED FOR EMPLOYING OF ANY OF TYPE OF LUBRICANT AT THE SIZING ORIFICE.
Description
DEFENSIVE PUBLIGATIUN UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public-for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter;
PUBLISHED JULY 25, 1972 T900,024 EXTRUSION APPARATUS FOR MANUFACTURE OF THERMOPLASTIC PIPE Edward R. Hollander, Jr., 124 Bloomingdale Pike, Apt. 27, Kingsport, Tenn. 37 660 Filed June 1, 1971, Ser. No. 148,566
Int. Cl, 329d 23/04 US. Cl. 18-14 A 1 Sheet Drawing. 10 Pages Specification Improved apparatus for the manufacture of plastic pipe and tubing including a forming die, a sizing plate, a water cooling bath contained in a closed chamber wherein a partial vacuum is maintained, the improvement Which consists in provision of a hollow tubular cooling element attached to or unitary with the sizing plate around the entire rim of the sizing orifice to form a chamber through which a coolant is continuously circulated. This element is particularly characterized by presenting a smooth, cooled, rounded edge circular sizing orifice to prevent formation of defects in the outer surface of the pipe which might otherwise arise from adhesion of the molten plastic to the metal surface of the sizing orifice, or from irregularities in the surface of an unrounded orifice, thus eliminating the need for employment of any type of lubricant at the sizing orifice.
July 25, 1972 E. R. HOLLANDER, JR T900924 EXTRUSION APPARATUS FOR MANUFACTURE OF THERMOPLASTIC PIPE Filed June 1 EDWARD R. HOLLANDER, JR
I NVENTOR.
m m N N wmco
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14856671A | 1971-06-01 | 1971-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST900024I4 true UST900024I4 (en) | 1972-07-25 |
Family
ID=22526326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US900024D Pending UST900024I4 (en) | 1971-06-01 | 1971-06-01 | Extrusion apparatus for manufacture of thermoplastic pipe |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST900024I4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447665A (en) * | 1986-03-31 | 1995-09-05 | Nupipe, Inc. | Method of removal of replacement pipe installed in an existing conduit |
-
1971
- 1971-06-01 US US900024D patent/UST900024I4/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5447665A (en) * | 1986-03-31 | 1995-09-05 | Nupipe, Inc. | Method of removal of replacement pipe installed in an existing conduit |
| US5587126A (en) * | 1986-03-31 | 1996-12-24 | Nupipe, Inc. | Method of manufacturing a pipe liner for installation in an existing conduit |
| US6135748A (en) * | 1986-03-31 | 2000-10-24 | Ina Acquisition Corp. | Apparatus for manufacturing a replacement pipe liner in reduced form |
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