WO1998057793A1 - Extrusion molding process and the related apparatus - Google Patents
Extrusion molding process and the related apparatus Download PDFInfo
- Publication number
- WO1998057793A1 WO1998057793A1 PCT/US1997/016668 US9716668W WO9857793A1 WO 1998057793 A1 WO1998057793 A1 WO 1998057793A1 US 9716668 W US9716668 W US 9716668W WO 9857793 A1 WO9857793 A1 WO 9857793A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molding
- die
- finished product
- molding die
- extrusion
- Prior art date
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000465 moulding Methods 0.000 claims abstract description 161
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 1
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 239000004033 plastic Substances 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/14—Making other products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/023—Work treatment directly following extrusion, e.g. further deformation or surface treatment
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/14—Clamps
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C49/4817—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity with means for closing off parison ends
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/467—Blowing fluids created by thermal expansion of enclosed amount of gas, e.g. heating enclosed air in preforms or parisons
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2021/00—Use of unspecified rubbers as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/12—Thermoplastic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
Definitions
- the present invention relates to an extrusion molding process, and more particularly to such an extrusion molding process in which the extruded tubular molding from an extruding die is clamped by two clamping devices at different elevations and downwardly stretched, and two symmetrical halves of a molding die are closed on the clamped molding between the clamping devices, causing the clamped molding to be compressed and molded into a finished product
- plastic material is extruded into a molding through an extruding die and then seized by clamping means and retained in a die cavity of a molding die, and then a cutting tool is moved to cut off the molding from the extruding die, and then a nozzle is inserted into the molding and air is blown into the molding in the die cavity of the molding die, causing the molding to be expanded and molded into a finished product
- the molding die is lowered and then opened After the finished product is removed from the molding die. the molding die is returned to its former position for a next molding cycle
- Nozzle and blow er means must be provided so that air can be blown into the extruded molding, causing it to expand in the die cavity of the molding die 2
- the nozzle When thermoplastic material is used and extruded into a molding through the extruding die and the extruded molding is seized by clamping means, the nozzle must be immediately inserted into the extruded molding so that the extruded molding can be swollen w ith air. avoiding its two opposite side walls from adhering together This blow molding procedure is not suitable for making a hollow product having a short pitch between its two opposite side walls
- the peripheral wall thickness of the extruded molding is not uniform, the extruded molding will bias from the course, causing itself unable to fall to the accurate position for catching by clamping means Even if the extruded molding is seized by clamping means and put in the die cavity of the molding die for molding, the ununiform wall thickness may cause the side walls of the finished product to be partially adhered together after the finished product is removed from the molding die
- the present invention has been accomplished to provide an extrusion molding process which eliminates the aforesaid drawbacks
- one clamping device of a molding die unit is clamped on the bottom end of the extruded molding and lowered to stretch the extruded molding downwards
- a second clamping device of the molding die unit is clamped on the upper end of the extruded molding, causing an air-tight space to be formed in the clamped molding
- two symmetrical halves of a molding die are moved toward each other between the two clamping devices and then closed on the clamped molding, causing the molding to be compressed in the die cavity of the molding die
- the molding is compressed, its inside pressure is relatively increased, thereby causing the wall of the molding to be closely attached to the surface of the die cavity of the molding die
- the clamping devices are released, and the
- Fig 1 is a sectional view of an extrusion molding apparatus showing a tubular molding extruded from the extruding die of the apparatus according to the present invention
- Fig 2 is a sectional view of the extrusion molding apparatus of the present invention, showing the lower clamping device clamped on the bottom end of the tubular molding,
- Fig 3 is a sectional view of the extrusion molding apparatus according to the present invention, showing the molding die unit lowered, the tubular molding stretched downwards
- Fig 4 is a sectional view of the extrusion molding apparatus according to the present invention, showing the upper clamping device and the lower clamping device respectively clamped on the tubular molding at different elevations.
- Fig 5 i s a sectional of the extrusion molding apparatus according to the present invention, showing the upper clamping device and the low er clamping device respectively clamped on the tubular molding at different elevations, and the molding die closed on the tubular molding between the clamping devices,
- Fig 6 is a sectional view of the extrusion molding apparatus according to the present invention, showing molding molded into a finished product, the molding die opened, and the clamping devices released.
- Fig 7 is a cross sectional view of the extruding die according to the present invention.
- Fig 8 shows the structure of a part of the molding die unit according to the present invention
- Fig 9 shows one die half of the molding die mounted on a base plate according to the present invention.
- Fig 1 0 is a plain view of the frame for the molding die unit according to the present invention.
- Fig 1 1 shows one die half of the molding die connected between the base plate and the frame according to the present invention
- Fig 12 is a front plain v iew of the molding die unit according to the present invention
- Fig 1 3 is a side plain view of the molding die unit according to the present invention
- Fig 1 4 is a sectional view of the molding die unit according to the present invention
- Fig 1 5 is a side plain view of the present invention, showing a tubular molding extruded from the extruding die
- Fig 1 6 is a plain view showing the two ends of the extruded molding clamped by the frame of the molding die unit according to the present invention
- Fig 1 7 is a plain view showing the two ends of the extruded molding clamped by the frame of the molding die unit and the molding die closed on the molding
- Fig 1 6 is a plain view showing the two ends of the extruded molding clamped by the frame of the molding die unit according to the present invention
- Fig 1 7 is a plain view showing the two ends of the extruded molding clamped by the frame of the molding die unit and the molding die closed on the molding
- Fig 1 8 is a sectional view of a part of the molding die, showing the structure of the pin in the die cavity DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
- a molding die unit 2 is set below an extruding die 1
- a driving mechanism (not shown) is mounted on the molding die unit 2 for vertical or oblique lifting control
- the molding die unit 2 comprises a molding die 3. and two clamping devices 4 mounted on both sides of the molding die 3
- the molding die 3 is comprised of two symmetrical halves, having a cavity 31 defined between its two symmetrical halves and a pin 32 raised from its one half within the cavity 31 Rollers 7 of a roller conveyer are disposed below the molding d ie unit 2
- a through hole 33 is made through the pin 32 of the molding die 3 which imparts a passage between the cavity 31 and the outside of the molding die 3
- a groove 34 is made on the end surface of the pm 32 and extended to the through hole 33. having at least one end passing to the periphery of the pin 32
- An adjustment element 35 is mounted in the through hole 33 By adjusting the vertical position of the adjustment element 35 in the through hole 33, the wall thickness of the finished product in the through hole 33 is controlled at the range between the end surface of the pin 32 to the adjustment element 35 Therefore, when the die is opened, the inside high pressure of the finished product immediately breaks the wall part of the finished product which extends to the adjustment element 35, and escapes to the outside to let inside pressure and outside pressure be balanced
- the aforesaid pin 32 When the aforesaid pin 32 is abutted against the pin of another cavity, high pressure from extrusion passes along the groove 34 to break the wall part of the finished product which extends to jthe adjustment element 35 and to escape to the outside Alternatively, the aforesaid through hole 33 can be made at the
- the aforesaid adjustment element 35 can be installed in the through hole 33 and adjusted to control the wall thickness of the tinished product in the through hole 33, so that when the die is open the inside high pressure of the finished product immediately breaks the wall part of the finished product which extends to the adjustment element 35, and escapes to the outside to let inside pressure and outside pressure be balanced
- the extruding die 1 comprises a conical core 11 made subject to the design of the desired finished product, an air nozzle 12 mounted in the conical core 1 1 , a ring- shaped mold plate 13 mounted around the conical core 1 1 , and adjustment screws 14 controlled to adjust the gap between the conical core 11 and the ring-shaped mold plate 13 subject to the depth of the cavity 31 of the molding die 3 Therefore, when material is delivered to the extruding die 1 , it can be extruded through the gap between the conical core 1 1 and the ring-shaped mold plate 13 into a molding 5 of thickness subject to the depth of the cavity 31 (see also Figure 6)
- the wall of the molding 5 between the clamping devices 4 is forced by the increased inside pressure of the molding 5 to closely adhere to the surface of the cavity 31 of the molding die 3 Because the molding 5 is stretched downwards and its both ends are seized by the clamping devices 4 and the inside pressure of the molding 5 forces the tubular wall of the molding 5 to expand, the molding 5 expands uniformly three- dimensionally
- each half of the molding die 3 is mounted on a respective base plate 6, and each part of each clamping device 4 is mounted on a frame 44 around one half of the molding die 3.
- guide rods 9 are fixedly mounted on the base plate 6 and inserted through holes (not shown) on the frame 44 for guiding the movement of the frame 44.
- a spring 8 is mounted between the base plate 6 and the frame 44 to force them apart. When the squeezing force is released, the spring 8 immediately pushes the base plate 6 and the frame 44 apart, causing them to be returned to their former positions.
- the clamping and compressing procedure can be down before the molding die 3 is lowered.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-1999-7011917A KR100502684B1 (en) | 1997-06-16 | 1997-09-24 | Extrusion Molding Process and the Related Apparatus |
AU44265/97A AU4426597A (en) | 1997-06-16 | 1997-09-24 | Extrusion molding process and the related apparatus |
CA002294015A CA2294015A1 (en) | 1997-06-16 | 1997-09-24 | Extrusion molding process and the related apparatus |
JP50436899A JP2002513342A (en) | 1997-06-16 | 1997-09-24 | Extrusion molding method and related equipment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/876,495 US6027683A (en) | 1996-06-17 | 1997-06-16 | Extrusion molding process and apparatus |
US08/876,495 | 1997-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998057793A1 true WO1998057793A1 (en) | 1998-12-23 |
Family
ID=25367854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/016668 WO1998057793A1 (en) | 1997-06-16 | 1997-09-24 | Extrusion molding process and the related apparatus |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP2002513342A (en) |
KR (1) | KR100502684B1 (en) |
CN (1) | CN1142847C (en) |
AU (1) | AU4426597A (en) |
CA (1) | CA2294015A1 (en) |
WO (1) | WO1998057793A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1116572A1 (en) * | 1999-06-24 | 2001-07-18 | Idemitsu Petrochemical Co., Ltd. | Blow molding method, blow molded product and blow molding mold |
EP1759827A4 (en) * | 2004-06-03 | 2013-12-11 | Mitsui Chemicals Inc | Die assembly for blow molding, process for producing hollow molded item of resin with use of the die assembly, and hollow molded item of resin produced by the process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108340559A (en) * | 2018-01-17 | 2018-07-31 | 罗弟容 | A kind of blow molding apparatus |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1409154A (en) * | 1921-08-11 | 1922-03-14 | Davis Theron | Method of making perforated blown rubber articles |
FR1338443A (en) * | 1953-09-17 | 1963-09-27 | Plastic hollow body molding process | |
US3450805A (en) * | 1966-08-29 | 1969-06-17 | Phillips Petroleum Co | Process of cooling a blown article |
US4092389A (en) * | 1973-04-28 | 1978-05-30 | Toyo Seikan Kaisha Ltd. | Method of blow molding and then exhausting hollow plastic articles |
US4116608A (en) * | 1976-10-26 | 1978-09-26 | Owens-Illinois, Inc. | Apparatus for forming a blown plastic container |
US4153408A (en) * | 1976-05-25 | 1979-05-08 | Hoechst Aktiengesellschaft | Process for extrusion blowing of thermoplastic hollow articles and gripper device for drawing the parison into the blow mold |
JPS59184625A (en) * | 1983-04-04 | 1984-10-20 | Hitachi Ltd | Manufacture of hollow caselike body |
JPS60120031A (en) * | 1983-12-03 | 1985-06-27 | Nissan Motor Co Ltd | Blow molding method and molding die thereof |
JPH0531788A (en) * | 1991-07-26 | 1993-02-09 | Kyoraku Co Ltd | Manufacture of thin hollow container and device thereof |
US5253995A (en) * | 1989-09-28 | 1993-10-19 | Caro Manufacturing Corporation | Apparatus for making a pulse dampener |
-
1997
- 1997-09-24 WO PCT/US1997/016668 patent/WO1998057793A1/en active IP Right Grant
- 1997-09-24 CA CA002294015A patent/CA2294015A1/en not_active Abandoned
- 1997-09-24 JP JP50436899A patent/JP2002513342A/en not_active Ceased
- 1997-09-24 CN CNB971822255A patent/CN1142847C/en not_active Expired - Fee Related
- 1997-09-24 KR KR10-1999-7011917A patent/KR100502684B1/en not_active IP Right Cessation
- 1997-09-24 AU AU44265/97A patent/AU4426597A/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1409154A (en) * | 1921-08-11 | 1922-03-14 | Davis Theron | Method of making perforated blown rubber articles |
FR1338443A (en) * | 1953-09-17 | 1963-09-27 | Plastic hollow body molding process | |
US3450805A (en) * | 1966-08-29 | 1969-06-17 | Phillips Petroleum Co | Process of cooling a blown article |
US4092389A (en) * | 1973-04-28 | 1978-05-30 | Toyo Seikan Kaisha Ltd. | Method of blow molding and then exhausting hollow plastic articles |
US4153408A (en) * | 1976-05-25 | 1979-05-08 | Hoechst Aktiengesellschaft | Process for extrusion blowing of thermoplastic hollow articles and gripper device for drawing the parison into the blow mold |
US4116608A (en) * | 1976-10-26 | 1978-09-26 | Owens-Illinois, Inc. | Apparatus for forming a blown plastic container |
JPS59184625A (en) * | 1983-04-04 | 1984-10-20 | Hitachi Ltd | Manufacture of hollow caselike body |
JPS60120031A (en) * | 1983-12-03 | 1985-06-27 | Nissan Motor Co Ltd | Blow molding method and molding die thereof |
US5253995A (en) * | 1989-09-28 | 1993-10-19 | Caro Manufacturing Corporation | Apparatus for making a pulse dampener |
JPH0531788A (en) * | 1991-07-26 | 1993-02-09 | Kyoraku Co Ltd | Manufacture of thin hollow container and device thereof |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1116572A1 (en) * | 1999-06-24 | 2001-07-18 | Idemitsu Petrochemical Co., Ltd. | Blow molding method, blow molded product and blow molding mold |
EP1116572A4 (en) * | 1999-06-24 | 2005-05-04 | Idemitsu Petrochemical Co | Blow molding method, blow molded product and blow molding mold |
EP1759827A4 (en) * | 2004-06-03 | 2013-12-11 | Mitsui Chemicals Inc | Die assembly for blow molding, process for producing hollow molded item of resin with use of the die assembly, and hollow molded item of resin produced by the process |
Also Published As
Publication number | Publication date |
---|---|
KR100502684B1 (en) | 2005-07-25 |
JP2002513342A (en) | 2002-05-08 |
AU4426597A (en) | 1999-01-04 |
CA2294015A1 (en) | 1998-12-23 |
CN1142847C (en) | 2004-03-24 |
KR20010013895A (en) | 2001-02-26 |
CN1259897A (en) | 2000-07-12 |
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