| Patents for B28B 21 - Methods or machines specially adapted for the production of tubular articles (3,281) |
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| 09/04/2013 | CN103274648A Granite stone powder doped high-strength concrete tubular pile and production method thereof |
| 09/04/2013 | CN102979086B Prestressed concrete square pile and manufacturing method thereof |
| 09/04/2013 | CN102431084B Concrete pipe pile manufacturing apparatus and method |
| 08/28/2013 | CN203156931U Integrated pile cloth rolling device |
| 08/28/2013 | CN102659334B Ore powder, preparation method of the ore powder and autoclave curing-free prestressed high-intensity concrete (PHC) production method |
| 08/21/2013 | CN203141646U Efficient telegraph pole manufacturing mold |
| 08/21/2013 | CN203141645U Conveniently used pile tip maker |
| 08/21/2013 | CN103252838A Once-formed manufacturing method and mold for glass magnesium smoke vent |
| 08/21/2013 | CN101896759B Pipe coating |
| 08/14/2013 | CN203125695U Mold releasing device |
| 08/14/2013 | CN203125694U Vibrating core rod |
| 08/14/2013 | CN103240802A Production method of prestress concrete filled steel tube |
| 08/14/2013 | CN102431088B Decomposable type spring die assembling bolt |
| 08/14/2013 | CN102343626B Concrete square pile die |
| 08/07/2013 | CN203110127U Novel pretensioning spun concrete square pile steel mould |
| 08/07/2013 | CN203110126U Elastic mold for manufacturing concrete cylinder |
| 08/07/2013 | CN203110125U Centrifuge for semicircular pre-stressed concrete channels |
| 08/07/2013 | CN203110124U Cement pipe manufacturing equipment |
| 08/07/2013 | CN103231449A Fast-electrifying heating bending device |
| 08/06/2013 | US8501665 Method for manufacturing film catalyst |
| 07/31/2013 | CN203092753U Concrete centrifugal test die |
| 07/31/2013 | CN203092752U Combined anchor head seal cap for motar pressing of prestressed pipeline |
| 07/31/2013 | CN203092751U Auxiliary starting device of precast concrete pile centrifugal machine unit |
| 07/31/2013 | CN203092750U Low-pressure water conveying pipeline making machine |
| 07/31/2013 | CN103225439A Environment-friendly concrete pole |
| 07/31/2013 | CN103224356A Green environmentally-friendly powder reinforced concrete water delivery pipe |
| 07/31/2013 | CN103223694A Technology for producing novel prestressing hollow square pile |
| 07/31/2013 | CN103223693A Centrifugal processing for prestressing hollow square pile |
| 07/31/2013 | CN102303368B Hollow shaft of concrete drainage pipe forming suspended roller machine |
| 07/24/2013 | CN203077460U Spring screw |
| 07/24/2013 | CN203077459U Square-pile steel mold with four round angles |
| 07/24/2013 | CN203077458U Mold device for producing double-layer water draining pipeline |
| 07/24/2013 | CN203077457U Splashing-proof device of concrete pipe centrifugal molding machine |
| 07/24/2013 | CN103213196A Prestressed concrete square pile spiral pipe driving device |
| 07/17/2013 | CN203062935U Assembling type high-slurry-leakproof steel die |
| 07/17/2013 | CN103203800A Environment-friendly tubular pile die |
| 07/17/2013 | CN102212992B Rectangular Pre-stressed reinforced concrete hollow pile with internal thread or internal groove and method for processing hollow pile |
| 07/10/2013 | CN203045974U Retractable inner mold device of gas and smoke discharging pipelines |
| 07/10/2013 | CN203045973U Self-propelled grouting vehicle for manufacturing PCCP (prestressed concrete cylinder pipe) cores |
| 07/10/2013 | CN203045972U Anti-splashing device of concrete pipe centrifugal shaping machine |
| 07/10/2013 | CN203045971U Hydraulic round tube manufacturing machine |
| 07/10/2013 | CN102720193B Surface coating prestressed concrete pipe pile and manufacturing process thereof |
| 07/10/2013 | CN102716828B Concrete pipe pile demoulding oil spraying device |
| 07/03/2013 | CN203031762U Tubular pile centrifugal forming mould |
| 07/03/2013 | CN203031761U Automatic mold clamp for travelling crane |
| 07/03/2013 | CN203031760U Blanking plate of tubular pile mold |
| 07/03/2013 | CN203031759U Distributing device for steel mould concrete pouring |
| 06/27/2013 | WO2013033512A3 Process for producing tubular ceramic structures of non-circular cross section |
| 06/26/2013 | CN203019523U Forming mould of formed uneven reinforcement prefabricated support piles |
| 06/26/2013 | CN203019522U Concave-convex type clamp connecting sleeve |
| 06/26/2013 | CN103171051A Fast anticorrosion pile-splicing manufacturing mold |
| 06/26/2013 | CN102261066B Self-adaptive pressure-reducing drainage pipe pile and preparation process thereof |
| 06/26/2013 | CN102251702B Activated powder concrete pole with high strength and high conductivity and making method thereof |
| 06/25/2013 | US8470119 Use of a leguminous starch in an adhesive labeling composition |
| 06/19/2013 | CN203004057U Automatic stopping system used for production of pipe piles |
| 06/19/2013 | CN102416666B Method for manufacturing one-piece-formed glass magnesium flue air pipe |
| 06/19/2013 | CN101913202B Mould for U-shaped concrete sheet-pile |
| 06/18/2013 | US8465814 High strength foam glass |
| 06/18/2013 | US8465687 Devices and methods of making hollow concrete elements |
| 06/12/2013 | CN202985772U Square pile hoop manufacturing device |
| 06/12/2013 | CN202985771U Die used for processing hollow spiral ceramic piece |
| 06/12/2013 | CN202985770U Novel prestressed tension tool for concrete tubular pile |
| 06/12/2013 | CN202985769U Pipeline mold with operating platform |
| 06/12/2013 | CN202985768U Hydraulic pushing device of prestressed concrete cylinder pipe (PCCP) water pipe protective layer guniting rotating cylinder |
| 06/12/2013 | CN103144189A Cement pipe manufacturing device |
| 06/12/2013 | CN102275221B Concrete tube pile forming die and concrete tube pile forming method |
| 06/11/2013 | US8460769 Powdered silica, silica container, and method for producing them |
| 06/11/2013 | US8459978 Method for manufacturing a composite drive shaft manufactured using mold |
| 06/05/2013 | CN202964895U Novel concrete reshaping device |
| 06/05/2013 | CN202964894U Wholly demolding mold of horizontal type prestressed concrete pipe |
| 06/05/2013 | CN202964893U Casting mould for exhaust passage |
| 06/05/2013 | CN202964892U Riding wheel used for high-speed centrifugal dewatering of cast tube cement coating and lining machine |
| 06/05/2013 | CN202963443U Assembling die for submersed nozzle of sheet billet |
| 06/05/2013 | CN103128850A Vibration core rod |
| 06/05/2013 | CN102672822B Spring die-closing bolt |
| 05/29/2013 | CN202952376U Vertical type multiwheel rolling tube-making machine |
| 05/23/2013 | WO2013071812A1 Forming method of high precision thin wall ceramic pipe |
| 05/22/2013 | CN202943742U Making mould of cement pipes |
| 05/21/2013 | US8444796 Mold for producing hollow-cylinder-like molded parts |
| 05/10/2013 | WO2013064894A2 Absorbent article having a troughed film as a transfer layer |
| 05/08/2013 | CN202922740U Cement pipe orifice die |
| 05/08/2013 | CN103086675A Prestress corrosion preventing tubular pile used in coastal special geological conditions as well as manufacturing method thereof |
| 05/08/2013 | CN103085168A Technology producing cement pipe with cement pipe manufacturing equipment |
| 05/01/2013 | CN202910986U Fabricated conduit molding die |
| 05/01/2013 | CN202910985U Spillage-preventing device for producing non-hoop pile |
| 05/01/2013 | CN202910984U Improved tooth-shaped pile mold |
| 05/01/2013 | CN202910983U Spring bolt of tension plate |
| 05/01/2013 | CN202910982U Compound die bolt and pipe pile forming die comprising same |
| 05/01/2013 | CN103072202A Pile toe maker convenient to use |
| 05/01/2013 | CN102398304B Pile splicing mechanism of finished piles |
| 05/01/2013 | CN102259386B Production method of high-strength concrete precast pile doped with fiber enhanced plastic tendon |
| 04/24/2013 | CN202895457U Centrifugal shaping mold of high-strength cone-shaped concrete pole |
| 04/24/2013 | CN202895456U Tubular pile excess material recovering system |
| 04/24/2013 | CN103061334A I-section prestressed reinforced concrete support pile by centrifugal pouring |
| 04/23/2013 | US8425715 Apparatus for high throughput wafer bonding |
| 04/17/2013 | CN202878482U Tubular pile mould fork-shaped blocking head plate |
| 04/10/2013 | CN202862385U Feeding device used for U-shaped pre-stressed concrete sheet pile |
| 04/10/2013 | CN202862384U Novel tensioning external member |
| 04/10/2013 | CN103030342A Non-autoclaved prestressed high-strength centrifuge pipe pile and preparation method thereof |
| 04/09/2013 | US8415268 Process for producing a ringlike oxidic shaped body |