The parison of the continuous extrusion hollow blow molding machine is continuous, through cutting, transferring the parison to the blow molding die or moving the blow molding die under the mouth mold, and then the mold, the expansion and the cooling. This method is suitable for the production of 10mL 30L hollow plastic products, the quality of products can be from a few grams to a few grams.

The equipment used by the general extruder, die, blow mold, clamping device and a blowing device. The die is one of the key parts in extrusion blow molding equipment, it affects the uniformity of thickness distribution, thus affecting the quality of the products, so the structure and design for preform die to choose, parison commonly used die frame type die, side inlet mode and double ring type bracket die three. Frame type die is suitable for processing of heat sensitive plastics, such as pvcC, PC, PET and PAN (Pan); side inlet mode is applied to the processing of medium molecular weight HDPE; double ring type die bracket is suitable for the processing of high molecular weight PE and PP. The form of the clamping device depends on the transfer of the blank or the moving mold, the transfer of the blank should be used to locate the mold locking device, and the mobile mold should be used in reciprocating or rotary mode locking device.

When the transfer billet is adopted, the positioning mode locking device is composed of a set or a plurality of opening and closing devices which are operated in the horizontal direction. In the blow molding operation, first of all, the use of fixture will be squeezed out of the billet and cut off, and then moved to blow mold, closed mold, blow molding. Transfer molding

In the clamping method, reciprocating clamping device is a group or several groups of hoist device in the die is made below the horizontal and vertical direction or a certain slope displacement, when the parison extrusion reaches the specified length, the reciprocating motion of the right lower die to blow molding mold, blow mold and then the parison is transferred to the bottom of the blowing air blowing device, and cooling and extrusion products. In the next stage of the billet is clamped, the blow mold is returned to the bottom of the mold.