Methods to manufacture the hula hoops and their products

Abstract

The present invention is a kind of innovative method to manufacture the hula loops and their products, which directly joints two ends of the hollow plastic pipe together to form an integrated body by a hot welding method. And, it is different from other ordinary methods that need to utilize a sleeved element or jointing device to joint then form the hula loop. It can not only reduce the waste of materials but also shorten the time required for manufacturing. Thus, it can reach the purpose of largely saving the manufacturing cost.

1 . A method to manufacture the hula loop, wherein the manufacturing steps including:
 Step 1. Cutting a certain length of hollow plastic pipe;   Step 2. Clamp-fixing two ends in opposite directions by a specific distance;   Step 3. Proceeding a heating simultaneously in the inner rim of one end and in the outer rim of the other end;   Step 4. Sleeve-jointing the heated two ends;   Step 5. Cooling the sleeve-jointed locations to fix-joint them and form as an integrated body; and   Step 6. The finished goods are then completed.   
   
   
       2 . A hula loop product being a hollow plastic pipe with its both ends heated, wherein the inner rim in one end is heated to slightly enlarge the outside diameter of the orifice and the outer rim in another end is heated to slightly shrink the outside diameter of the orifice such that two ends of the hollow plastic pipe can be mutually sleeve-jointed together then fix-jointed as an integrated body after being cooled to form a circular hula loop.