| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 04/16/2008 | CN100381268C Centrifugal tool with thin-wall pipe |
| 04/16/2008 | CN100381267C Centrifugal tool with thin-wall pipe |
| 04/10/2008 | US20080083519 Method of Producing Absorbent Sheet with Increased Wet/Dry CD Tensile Ratio |
| 04/09/2008 | CN100380050C Method for manufacturing stainless steel flue pipe for coal-fired stove |
| 04/02/2008 | CN201042830Y Equipment for producing paved inner lining PVC of inner lining PVC reinforced concrete sewer pipe |
| 04/02/2008 | CN101152742A Production technique for main wind pipe connected with branch wind pipe and produced wind pipe thereof |
| 04/02/2008 | CN101152741A Pipe component manufacturing method and adopted equipment thereof |
| 03/27/2008 | US20080073805 Apparatus and Method for Checking Mold Vent Condition |
| 03/26/2008 | CN201040405Y Hollow cement product centrifugation forming machine rotary barrel |
| 03/25/2008 | US7347227 Method of reinforcing a cylindrical pipeline and prefabricated plate used in such method |
| 03/19/2008 | EP1626848B1 Bottom ring for a mould for casting a concrete pipe with partially embedded rubber strip |
| 03/19/2008 | CN101143465A Bar shape tubular pile mould |
| 03/13/2008 | US20080063743 Insert-molding mold |
| 03/06/2008 | WO2008025200A1 A prestressed concrete pipe unit with a steel socket and a steel spigot and a concrete pipe formed of such concrete pipe units |
| 03/06/2008 | US20080053634 papermaking for producing a fiber web having a mass per unit area of less than 125 g/m2; applying a liquid which has a starch solids concentration of 15% or more; increase paper strength; no slime formation, no deposits |
| 03/05/2008 | EP0986828B1 Shaped body consisting of textured supraconductor material and method for producing the same |
| 03/05/2008 | CN201030617Y Synchronous locking over-length stretching self-centering centrifugal machine for ceramic lining compound oil pipe |
| 03/05/2008 | CN201030616Y Self-centering synchronous locking loop for ceramic lining compound oil pipe over-length centrifugal machine |
| 02/28/2008 | DE102006034512B4 Monolithischer Rohrkrümmer für große Rohre und Verfahren zu seiner Herstellung Monolithic elbows for large pipes and process for its preparation |
| 02/26/2008 | US7335012 Apparatus for fabricating reinforced composite materials |
| 02/20/2008 | CN201024421Y Centrifugal type concrete pile and forming die |
| 02/13/2008 | CN201020803Y Single port combined rolling die without vertical ring reinforced rib |
| 02/13/2008 | CN201020802Y Lubricant oil cooling system for cement concrete tube shaping machine |
| 02/13/2008 | CN201020801Y Cement fence shaping machine |
| 02/13/2008 | CN201020800Y Easily-detachable quick-assembling vertical column forming machine planar support plate |
| 01/30/2008 | CN201012520Y Lengthways convex rib pipe pile peg mould |
| 01/30/2008 | CN201012519Y Core vibrating tube machine |
| 01/30/2008 | CN101113801A Tubular shape core mould centrifugation tube machine equipped with shield cap |
| 01/30/2008 | CN101113800A Fiber reinforcement type brittlement radical compound material pipeline coatings, its coating method and pipeline |
| 01/30/2008 | CN101112774A Ultra-thin cement core tube for the wall and method of manufacturing the same |
| 01/24/2008 | US20080020080 Method and Apparatus for Manufacturing Open Core Elements from Web Material |
| 01/23/2008 | EP0954258B1 Apparatus and process for forming prosthetic socket |
| 01/23/2008 | CN201009362Y Centrifugal type concrete pipe pile molding mould |
| 01/23/2008 | CN201009361Y Centrifugal type concrete prism pile molding mould |
| 01/23/2008 | CN201009360Y SHS synchronous adjustable centrifugal machine |
| 01/23/2008 | CN201009359Y Pipe pile concrete affusing auxiliary device |
| 01/23/2008 | CN101108508A Method for manufacturing fire resistant water discharge collecting tube and mold for manufacturing the same |
| 01/17/2008 | CA2593928A1 Form and method and apparatus for making a form |
| 01/16/2008 | CN101105033A Method for supporting and protecting building foundation pit by employing transverse-diaphragm prestressing concrete pipe pile |
| 01/16/2008 | CN101104814A Wear-resisting jet pipe |
| 01/09/2008 | CN201002309Y 55mPHC pipe pile steel die |
| 01/09/2008 | CN201002308Y Centrifugal pipe pile die |
| 01/09/2008 | CN201002307Y Centrifuge set used for preparing 55mPHC pipe pile |
| 01/02/2008 | CN200998888Y Cement stake forming machine |
| 01/02/2008 | CN101096114A High-durability prestressed high-strength concrete pipe pile |
| 01/02/2008 | CN101096113A PHC pipe pile end portion plasm stopping technique and plasm stopping O-shaped loop for the technique |
| 12/26/2007 | EP1870389A2 Extrusion or injection moding composition and method for preparing molded part |
| 12/26/2007 | CN200995446Y Forming mould of cement filter pipe |
| 12/25/2007 | US7311863 Method for producing glass-like carbon pipe, and glass-like carbon pipe produced by such method |
| 12/25/2007 | US7311513 Installation for producing objects by thermoforming pellets of thermoplastic material |
| 12/19/2007 | CN200991960Y Artistic cement guard railing partition column mould |
| 12/19/2007 | CN200991959Y Artistic cement railing mould drum |
| 12/19/2007 | CN200991958Y Connection structure of core mould vibrator and motor of concrete pipe |
| 12/19/2007 | CN101088731A Centrifugal pipe making machine with tubular core mold |
| 12/12/2007 | CN200988276Y Adjustable core rod for equal static pressure forming machine by dry bag method |
| 12/12/2007 | CN200988275Y Automatic forming machine for railing rod |
| 12/12/2007 | CN101085536A Method for pouring thin-wall steel pipe centrifugal concrete pipe pile by pumped concrete |
| 11/28/2007 | CN200981292Y Cartridge core mould |
| 11/28/2007 | CN101077595A Process for making concrete pile and its special-purpose equipment |
| 11/15/2007 | WO2007129992A1 Mould sleeve and moulding method |
| 11/14/2007 | CN200974296Y Longitudinal hoop reinforcement pipe pile mould |
| 11/14/2007 | CN200974295Y Hoop reinforcement pipe pile mould |
| 11/14/2007 | CN200974294Y Corrugated longitudinal reinforcement pipe pile mould |
| 11/14/2007 | CN200974293Y Manufacturing device for glass reinforced plastic sand inclusion pipe layer |
| 11/14/2007 | CN200974292Y Manufacturing device for glass reinforced plastic sand inclusion pipe layer |
| 11/13/2007 | US7294375 Cement composite, concrete, concrete cask and method of manufacturing concrete |
| 11/07/2007 | EP1534482B1 Method and apparatus for fabricating a hollow-core concrete product |
| 11/06/2007 | US7290338 Method and apparatus of manufacturing electric pole |
| 10/24/2007 | CN200963875Y Special-purpose section steel for cement pipe tip |
| 10/18/2007 | US20070243282 Catheter Molding Apparatus |
| 10/18/2007 | US20070243280 Concentric machining device for a roller |
| 10/17/2007 | CN200960695Y Continuous feeding type roller concrete injector |
| 10/17/2007 | CN101053977A Core mould vibrating bar for core mould vibrating machine |
| 10/11/2007 | WO2007114795A1 A method and system to design a hollow core concrete panel |
| 10/10/2007 | EP1841999A1 Sealing ring |
| 10/03/2007 | CN200954658Y Uniform roll spraying device of pulp sprayer |
| 09/27/2007 | DE10241238B4 Formeinsatz für Formmaschinen Mold insert for molding machines |
| 09/27/2007 | DE102006013350A1 Einrichtung zur Herstellung einer Dichtanordnung für Rohre und Schachtbauwerke Means for producing a sealing arrangement for pipes and manholes |
| 09/26/2007 | CN200951599Y Wave shape reinforced type pipe pile mould |
| 09/26/2007 | CN200951598Y Irregular reinforced shape pipe pile mould |
| 09/26/2007 | CN101041964A Pretensioned prestressing concrete shape tube pile and method for producing same |
| 09/26/2007 | CN100339202C Composite type antibacterial water stable nano air conduit |
| 09/19/2007 | CN200948646Y Special centrifugal machine for manufacturing stainless fire tube |
| 09/19/2007 | CN101037010A Centrifugal shaping tool |
| 09/19/2007 | CN100337971C High-strength durable composite material and its production and application |
| 09/12/2007 | CN200945679Y Concrete counterweight coating equipment |
| 09/12/2007 | CN101033658A High-durability high-activity powder concrete electrical pole |
| 09/12/2007 | CN101032840A Centrifugal shaping tool |
| 09/12/2007 | CN101032839A Centrifugal shaping tool |
| 09/12/2007 | CN101032838A Centrifugal shaping tool |
| 09/12/2007 | CN101032837A Centrifugal shaping tool |
| 09/12/2007 | CN101032836A Centrifugal shaping tool |
| 09/12/2007 | CN101032835A Centrifugal shaping tool |
| 09/12/2007 | CN100336649C Method of manufacturing prestressed high strength concrete hollow square pile centrifugal, steam, maintenance method |
| 09/11/2007 | US7267872 Braid-reinforced hollow fiber membrane |
| 09/06/2007 | DE102006010393A1 Vorrichtung zum Handhaben deformationsgefährdeter, frisch extrudierter Ziehkörper Apparatus for handling deformation vulnerable, freshly extruded body drawing |
| 09/05/2007 | CN200942559Y Ventilation duct mould for kitchen and toilet |
| 09/05/2007 | CN100335257C Novel circulating use method for residual grout of PHC pipe pile |
| 09/04/2007 | US7263758 System and method for casting toilet bowls |
| 08/29/2007 | EP1494839B1 Moulding unit for manufacturing a shaft bottom part with lateral outlets |