Universal parison forming

Fast cycle times with consistent results

Powerful and intuitive user interface

Universal parison forming

Fast cycle times with consistent results

Powerful and intuitive user interface

Model TSE Tube Stretcher (Parison Former)

A new parison forming machine using a radial compression mechanism for quick and even heating on any tube sizes up to 9 mm. No tool changes needed for different diameter tubing.

The Blockwise Model TSE “Tube Stretcher” Parison Forming Machine is designed to automatically stretch raw tubing extrusions into a parison for use in the balloon blow molding process. Model TSE “Tube Stretcher” uses a Blockwise radial compression mechanism to heat the tubing prior to stretching for contact-based heating on tubing sizes up to 9 mm. The radial compression mechanism provides repeatable process control with shorter process times and sharper parison transitions when compared to non-contact parison forming machines. A touchscreen HMI provides quick and easy control over the entire process. 

The cycle time to process a typical 20 mm long PTCA balloon parison is 20 – 25 seconds, including loading and unloading the machine.

The Tube Stretcher uses a radial compression mechanism that can accommodate tube sizes up to 9 mm. With 5 heated stainless-steel dies, it heats the plastic tubing much more quickly than non-contact dies, decreasing overall process time.

A low-profile air blower is used to protect the plastic tube from the heat of the compression mechanism as the tubing is passed through the mechanism.

A new parison forming machine using a radial compression mechanism for quick and even heating on any tube sizes up to 9 mm. No tool changes needed for different diameter tubing.

The Blockwise Model TSE “Tube Stretcher” Parison Forming Machine is designed to automatically stretch raw tubing extrusions into a parison for use in the balloon blow molding process. Model TSE “Tube Stretcher” uses a Blockwise radial compression mechanism to heat the tubing prior to stretching for contact-based heating on tubing sizes up to 9 mm. The radial compression mechanism provides repeatable process control with shorter process times and sharper parison transitions when compared to non-contact parison forming machines. A touchscreen HMI provides quick and easy control over the entire process. 

The cycle time to process a typical 20 mm long PTCA balloon parison is 20 – 25 seconds, including loading and unloading the machine.

The Tube Stretcher uses a radial compression mechanism that can accommodate tube sizes up to 9 mm. With 5 heated stainless-steel dies, it heats the plastic tubing much more quickly than non-contact dies, decreasing overall process time.

A low-profile air blower is used to protect the plastic tube from the heat of the compression mechanism as the tubing is passed through the mechanism.

(Step 1) The tube is loaded into both grippers. Pressing the START button closes the compression mechanism, which quickly heats a 75 mm section of the tubing.

(Step 2) The compression mechanism opens, both the top and bottom grippers then move in opposite directions to stretch the tubing. The top gripper has an integrated force sensor that allows measurement and control of the tension in the tube.

(Step 3) After the 1st stretch the parison is moved through the compression mechanism to prepare for the second stretch.

(Step 4) Both grippers again move in opposite directions for the final stretch. After the process is finished the parison can be dropped into a bin below the bottom gripper.

A touchscreen HMI (human-machine interface) allows the user to enter settings in “recipes” that specify a set of parameters for the parison forming process. Calibration and gauge checks are easy. Manual mode allows direct commands without a recipe. Engineering, maintenance, and manual functions can be password-protected.

Calibration and checking of temperature, force, and pressure is very quick and easy. Specific screens for checking or calibrating walk the user through the process. The intuitive process reduces the likelihood of calibration mistakes. User-supplied reference instruments for force (weights), pressure, and temperature are required.

The TSE is designed with indefinite longevity and reliability in mind.  The user manual recommends inspection procedures and replacement intervals for wear components.