| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 04/04/2013 | WO2012175406A3 Method for producing a tower segment of a concrete tower of an wind energy installation |
| 04/03/2013 | CN202846686U Pole pouring mould |
| 04/03/2013 | CN202846685U Connecting device of pole pouring mould |
| 04/03/2013 | CN202846684U Connecting device of electric pole pouring mould |
| 04/03/2013 | CN202846683U Double wall type steel die with inside die and outside die for prestressed concrete heterotypic pile |
| 04/03/2013 | CN202846682U Adhesion agent spraying equipment used for producing prestress steel cylinder concrete pipe with adhesion agents |
| 04/03/2013 | CN103009476A Square tube pouring mould |
| 04/03/2013 | CN102285002B Concrete vibrating vehicle for pile production line |
| 04/03/2013 | CN101899830B Manufacturing method of cement pipe pile for construction |
| 03/27/2013 | CN202826046U Demoulding device of concrete tubular pile |
| 03/27/2013 | CN202826045U Machining die of H-shaped support pile |
| 03/27/2013 | CN202826044U Long line method prestressing force fender post manufacturing mold |
| 03/27/2013 | CN202826043U Die of roll tubular brick |
| 03/27/2013 | CN202826042U Die capable of quickly manufacturing reinforcement cage |
| 03/27/2013 | CN202826041U Wire prestressing machine hydraulic jacking device for water-conveying prestressed concrete cylinder pipe (PCCP) |
| 03/27/2013 | CN102995629A Precast reinforced concrete square pile and manufacturing method thereof |
| 03/27/2013 | CN102990776A Double-layered steel mould for manufacturing bamboo-joint-shaped prestressed concrete pipe pile |
| 03/27/2013 | CN102275218B Die assembling or removing device and method for assembling or removing die by using same |
| 03/20/2013 | CN202811780U 弹簧螺丝 Spring screws |
| 03/20/2013 | CN202805408U Automatic die filling and stripping equipment for tubular products |
| 03/20/2013 | CN202805407U Vertical vibrating steel die for lining-type prestressed concrete cylinder pipe (PCCPL) |
| 03/20/2013 | CN202805406U Improved production line of centrifugal pile |
| 03/20/2013 | CN202805405U Automatic production line of centrifugal pile |
| 03/20/2013 | CN202805404U Middle-sized centrifugal nodular cast iron pipe cement coating and lining machine |
| 03/20/2013 | CN202805403U Bottom pallet for concrete pipe fittings pipe |
| 03/20/2013 | CN102979086A Prestressed concrete square pile and manufacturing method thereof |
| 03/20/2013 | CN102975284A Electric pole pouring mold connecting device |
| 03/20/2013 | CN102975283A Forming method for ununiformly reinforcement-arranged precast pile |
| 03/20/2013 | CN102975282A Method for forming unnonuniformly reinforcement-arranged precast pile |
| 03/20/2013 | CN102975281A Riding wheel for high-speed centrifugal dewatering of cast tube cement coating machine |
| 03/20/2013 | CN102284849B Method for detaching die for large-caliber reinforced concrete pipe |
| 03/20/2013 | CN102172984B Novel die assembly distribution system with reducing feed pipe and method |
| 03/13/2013 | CN202781423U Novel centrifugal shaping mold set for concrete hollow square piles |
| 03/13/2013 | CN202781422U Prestress precast pile fast connect stretch-draw piece assembly |
| 03/13/2013 | CN202781421U Push type concrete pole special shape forming machine |
| 03/13/2013 | CN102966093A Non-uniform reinforcing bar prefabricated support pile as well as forming method and forming die thereof |
| 03/13/2013 | CN102962889A Pole pouring mold connecting device |
| 03/13/2013 | CN102962888A Die for forming uneven reinforcement prefabricated support piles |
| 03/13/2013 | CN101733834B Pipe pile spreader |
| 03/07/2013 | WO2013033512A2 Process for producing tubular ceramic structures of non-circular cross section |
| 03/07/2013 | WO2013033510A1 Process for producing tubular ceramic structures |
| 03/07/2013 | CA2846868A1 Process for producing tubular ceramic structures of non-circular cross section |
| 03/07/2013 | CA2846864A1 Process for producing tubular ceramic structures |
| 03/06/2013 | CN202764003U Vertical forming die base for smoke exhaust pipeline |
| 03/06/2013 | CN202764002U Vertical vibrating armoured pipe mould |
| 03/06/2013 | CN202764001U Annular concrete pole prestress inward-tension device |
| 03/06/2013 | CN202764000U Steel bar positioning plate |
| 02/27/2013 | CN202753279U Novel tension board assembly |
| 02/27/2013 | CN102941622A Centrifugal forming die and construction method for high-strength conical cement pole |
| 02/26/2013 | US8383214 Diffusion barrier coatings having graded compositions and devices incorporating the same |
| 02/26/2013 | US8382936 Aqueous biopolymer-containing labeling adhesive |
| 02/20/2013 | CN202745040U Prestressed concrete centrifugal square pile and molding die thereof |
| 02/20/2013 | CN202742510U Flue mould |
| 02/20/2013 | CN202742509U Tension device for prestress tubular pile or prestress square pile |
| 02/20/2013 | CN202742508U Centrifugal machine running wheel |
| 02/20/2013 | CN202742507U Low-noise centrifuge running wheel |
| 02/20/2013 | CN202742506U Concrete pouring platform with feeding cone |
| 02/13/2013 | CN202730748U Octagonal concrete centrifugal pile and forming mold thereof |
| 02/13/2013 | CN202730747U Prestressed concrete hollow square pile and molding die |
| 02/13/2013 | CN202727090U Guiding mould on slicking device of prestressed steel cylinder concrete pipe vertical roll machine |
| 02/13/2013 | CN202727089U Vertical cement flue production device capable of forming rectangle in one shot |
| 02/13/2013 | CN102922599A Tool for plastering cement mortar on concrete pipe joints |
| 02/13/2013 | CN102922598A Fabricating method of concrete preformed pile in saline soil region |
| 02/13/2013 | CN102922597A Tubular pile excess material recycling system |
| 02/13/2013 | CN101323137B Thin walled pipe centrifugal shaper |
| 02/12/2013 | US8372242 Conductive webs and process for making same |
| 02/06/2013 | CN202716373U Prefabricated molding mold with water seepage function |
| 02/06/2013 | CN202716372U Template of prefabricated molding mold |
| 02/06/2013 | CN202716371U Trolley for conveying assembly from automatic production line of concrete tubular pile |
| 02/06/2013 | CN102909784A Method and device for producing prestressed concrete cylinder pipe by surfactant |
| 02/06/2013 | CN102909783A Production process of building envelope products |
| 02/06/2013 | CN102909782A Feeding device for U-shaped pre-stress concrete pile plank and control method |
| 02/06/2013 | CN102139515B Novel die-compounding and distributing system and method for producing concrete pile |
| 01/30/2013 | CN202702390U Spring compound die bolt |
| 01/30/2013 | CN202702389U Circular concrete electric pole prestress external tension device |
| 01/30/2013 | CN202702388U Automatic roll-over feed mechanism of concrete tubular pile steel bar upsetting machine |
| 01/30/2013 | CN202700708U Mold-releasing oil spraying apparatus for concrete pipe pile |
| 01/30/2013 | CN102900078A Anticorrosive preformed pile and manufacturing and constructing method thereof |
| 01/30/2013 | CN102900075A Helical concrete tubular pile device and production method thereof |
| 01/30/2013 | CN102896694A Centrifuge |
| 01/30/2013 | CN102896693A Suspension roll machine |
| 01/24/2013 | WO2013010664A1 Method and sliding form for producing a structure and corresponding structure |
| 01/23/2013 | CN202685087U Manufacturing equipment for vertical grouting flue |
| 01/23/2013 | CN202685086U Centrifugal concrete square pile forming mould |
| 01/23/2013 | CN202685085U Shrinkable rounded inner mold device |
| 01/23/2013 | CN202685084U Production system for preparing pipes by applying coal ash |
| 01/23/2013 | CN202685083U Full-automatic tubular pile spreading machine |
| 01/23/2013 | CN101356046B Process for the production of piping made of a cementitious material having a circular section |
| 01/16/2013 | CN202672138U Centrifugal concrete rectangular pile |
| 01/16/2013 | CN202668755U Square pile mould stretch-draw dismounting-free tail plate |
| 01/16/2013 | CN202668754U Free-disassembly tensile head plate of square-pile die |
| 01/16/2013 | CN202668753U Flat foldable flue mould |
| 01/16/2013 | CN202668752U Centrifugal forming die for concrete rectangular pile |
| 01/16/2013 | CN202668751U Stress fluctuation control equipment of wire winding machine |
| 01/16/2013 | CN202668750U Molding machine for pipeline wallboard |
| 01/16/2013 | CN202668749U Prefabricated flue gas exhaust pipeline forming machine |
| 01/16/2013 | CN202668748U Charging device for alumina ceramic pipe fabrication process |
| 01/16/2013 | CN202668747U Device of drawing core rod in alumina ceramic pipe fabrication process |
| 01/16/2013 | CN202668746U Thin-wall pipeline head |
| 01/16/2013 | CN102873752A Automatic moulding and demoulding equipment for tubular products |