| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 08/29/2007 | CN101024985A Foam concrete wall for buildings construction |
| 08/22/2007 | EP1536933B1 Moulding insert for moulding machines |
| 08/22/2007 | CN1332797C Method and appts. for mfg. pole |
| 08/22/2007 | CN101021099A Plastic wooden tent pole and producing method thereof |
| 08/22/2007 | CN101020342A Asbestos-free fiber cement pipe |
| 08/15/2007 | CN2933808Y Detachment-free mould |
| 08/15/2007 | CN101016791A High-strength plastic wood composite rod and manufacture method therefor |
| 08/15/2007 | CN101016018A Manufacture method for artistic cement lamp stand |
| 08/15/2007 | CN101015937A Thin wall tube centrifugal shaping machine |
| 08/14/2007 | US7255320 Mold for a plastic filter |
| 08/02/2007 | US20070178183 Extrusion apparatus and adapters therefor |
| 08/01/2007 | CN2928445Y Pipe connector |
| 08/01/2007 | CN2928444Y Numerical control railing rod forming machine |
| 07/25/2007 | CN2925822Y Forming machine for rolled product |
| 07/25/2007 | CN101003152A Method of chemical prestress technique for thin steel pipe pile of pressed and steamed high strength concrete |
| 07/24/2007 | CA2387308C Apparatus and method for removing joint rings from cured concrete products |
| 07/11/2007 | CN1994710A Technique for producing pipe pile by mixing finely grinded metallurgical slag and fly ash |
| 07/11/2007 | CN1994708A Prestressed concrete hollow pile production pile |
| 07/11/2007 | CN1325239C Concrete pipe manufacturing equipment and method |
| 07/04/2007 | CN1991092A Interior-column-type building module and manufacturing method thereof |
| 07/03/2007 | US7238309 Extruded ceramic log transfer system |
| 06/28/2007 | US20070148275 Spin Pack Assembly |
| 06/27/2007 | CN1323254C Super large caliber centripetal stress high pressure water transport pipe and its preparing process |
| 06/27/2007 | CN1323253C Large caliber oblique stress high strength water transport pipe and its preparing process |
| 06/20/2007 | CN2912958Y Automatic forming apparatus for thin-wall pipe |
| 06/20/2007 | CN1982016A Thin-wall pipe rotary forming machine |
| 06/20/2007 | CN1982015A Centrifugal tool |
| 06/20/2007 | CN1982014A Centrifugal tool |
| 06/14/2007 | WO2007067230A1 Method for making elongate glove, such as nitrile glove for glove box, on porcelain mold |
| 06/14/2007 | WO2007065699A1 Process for the production of piping made of a cementitious material having a circular section |
| 06/14/2007 | WO2007065668A1 Process for the production and form preservation of an extruded product made of cementitious material |
| 06/14/2007 | CA2632623A1 Process for the production and form preservation of an extruded product made of cementitious material |
| 06/14/2007 | CA2631225A1 Process for the production of piping made of a cementitious material having a circular section |
| 06/13/2007 | CN2910512Y Make-up machine for porcelain imitating vase column |
| 06/07/2007 | WO2005094495A3 Heating panel |
| 06/07/2007 | US20070125272 Geopolymer concrete and method of preparation and casting |
| 06/06/2007 | CN1974162A Material injector for forming thin wall cement pipe |
| 05/31/2007 | US20070120292 Stamper, imprinting method, and method of manufacturing an information recording medium |
| 05/23/2007 | CN1966230A Light-wall pipe centrifugal forming machine |
| 05/16/2007 | CN2900123Y Pipe end support rotation device for concrete counterweight pipe |
| 05/16/2007 | CN1316131C Hollow less floor pipe core for cast-in-place concrete and its production technology |
| 05/15/2007 | US7216842 Pocket former |
| 05/10/2007 | US20070102127 Method and apparatus for producing tissue paper |
| 05/09/2007 | CN2897602Y Reinforced-concrete resin grout cast pipe |
| 05/09/2007 | CN2897601Y Prestressed tubular pile stretcher |
| 05/09/2007 | CN1958261A Method for manufacturing wire pole from steel fiber concrete with no bracing wire |
| 05/02/2007 | CN1954982A Method for manufacturing prestressed high strength pile material |
| 04/25/2007 | CN2892436Y Prestress steel reinforced concrete well pipe mould |
| 04/24/2007 | US7207792 Expansion tube having expansion slits and apparatus for manufacturing heat shrinkable tube having the expansion tube |
| 04/18/2007 | CN1948654A Manufacturing method of heat insulating wall board and construction method of its wall body |
| 04/11/2007 | CN2887559Y Translational type concrete tube sheet mould |
| 04/11/2007 | CN1943920A Method for producing low pressure cast aluminum liquid lift pipe |
| 03/28/2007 | EP1480801B1 Method for producing a manhole ring and upper sleeve for producing said manhole ring |
| 03/28/2007 | CN2882955Y Pipe maker for mfg fiber cement pipes |
| 03/28/2007 | CN2882954Y Viberating cored rod of cement pipe maker |
| 03/28/2007 | CN1936393A Ceramic-pipe type rotary plug valve and mfg. process |
| 03/22/2007 | WO2006130047A3 Device for producing construction modules |
| 03/21/2007 | CN2880439Y Pipe clip and end |
| 03/21/2007 | CN2880438Y Centrifugal concrete pile mould |
| 03/20/2007 | CA2416945C Valve for use in producing cast concrete articles |
| 03/14/2007 | EP1273012B1 Method and system for manufacturing storage container for storing nuclear fuel |
| 03/14/2007 | CN2878016Y Production device for integral hollow Roman prism |
| 03/08/2007 | US20070052123 Vertical moulding of long concrete articles |
| 03/07/2007 | CN1923483A Mechanical automatically-folding vertical internal mold |
| 03/01/2007 | US20070048402 Method for manufacturing arc tube body and core used in the method |
| 02/21/2007 | CN2871156Y Vibration core-mould cement pipe forming machine |
| 02/21/2007 | CN2871155Y Vibration core rod and internal mould connecting mechanism of cement pipe maker |
| 02/21/2007 | CN2871154Y Vertical cement pipe forming machine |
| 02/20/2007 | US7179080 Tube bending fixture |
| 02/15/2007 | US20070035065 Concrete pipe manufacturing machinery and method |
| 02/14/2007 | CN2868621Y Tamping former |
| 02/14/2007 | CN2868620Y Wall-column forming machine |
| 02/07/2007 | CN2866080Y Mechanical automatic opening and closing vertical cores |
| 02/07/2007 | CN2866079Y Inserting vibrating die |
| 02/06/2007 | US7172404 Molding insert for molding machines |
| 02/01/2007 | US20070026172 Fibre reinforced cement column and method of forming the same |
| 02/01/2007 | US20070026102 Systems and methods of solid freeform fabrication with improved powder supply bins |
| 02/01/2007 | DE102005032323B3 Verfahren zur Herstellung eines Schachtunterteils Process for the preparation of a shaft bottom part |
| 01/24/2007 | CN2860795Y Chucking tubular core mould cartridge |
| 01/24/2007 | CN2860794Y Temperature supervisory control system for vibration core stick in core vibration technology |
| 01/23/2007 | CA2425198C Flexible lightweight concrete form |
| 01/17/2007 | CN1295063C Pipe making method for suspension roller type spigot and socket mouth reinforced concrete pipe |
| 01/16/2007 | US7162783 Forming elements from concrete pipe |
| 01/03/2007 | CN2853355Y External mold of vertical vibration pipe mould |
| 01/03/2007 | CN2853354Y Isostatic compaction mould for producing ceramic casing pipe blank |
| 01/03/2007 | CN2853353Y Vertical vibration pipe mould |
| 01/03/2007 | CN1887559A Making process of steel mold for pretentioned prestressing spiral concrete pile |
| 12/20/2006 | CN2848518Y Special processing equipment for small diameter thin wall cement tube |
| 12/20/2006 | CN1882516A Geopolymer concrete and method of preparation and casting |
| 12/20/2006 | CN1290681C Technology for producing reinforced concrete drain-pipe |
| 11/28/2006 | CA2292701C Shaped bodies comprising textured superconducting material and a process for their production |
| 11/23/2006 | US20060263464 Press-molding mold |
| 11/22/2006 | CN2838909Y Hydraulic rotary cloth core mould vibration pipe-making machine |
| 11/15/2006 | CN1863654A Vertical moulding of long concrete articles |
| 11/15/2006 | CN1284911C Steel skeleton composite arch |
| 11/09/2006 | WO2006119433A1 A ceramic article |
| 11/08/2006 | CN1857891A Chimney of composite material and its making process |
| 10/25/2006 | CN2830035Y Cement thin-wall cylinder shaper |
| 10/24/2006 | US7125239 Concrete pipe manufacturing machinery and methods |
| 10/19/2006 | US20060230595 Vibration table for concrete moulding machines |