back to top
My wish lists
Save your wish list
If you want to add more content to your wish list, simply log in. If you do not have a user account, please register for the Hanser Customer Center.

» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.
Your wish lists
If you want to use your wish list during your next visit, simply log in. If you do not have a user account, please register for the Hanser Customer Center.
» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.

« Back

Your advantages at a glance

  • One login for all Hanser portals
  • Individual home page for faster access to preferred content
  • Exclusive access to selected content
  • Personal wish lists on all portals
  • Central management of your personal information and newsletter subscriptions

Register now
Deutsch
Bookmark Bookmarked
10-12-2015

Precise Dosing from 10 mg per Shot

Cylinder Dosing Unit for Micro Injection Molding and Extrusion

Tschritter GmbH, Dorfprozelten, Germany, has developed two different cylinder dosing units for use on injection molding and extrusion machines. The Cyclical Dosing System (WD 1) doses two or more additives directly into the (virgin) material flow on the machine. The Simultaneous Dosing System (WD 2) doses two or more different additives or pellet compounds simultaneously and in parallel directly onto the machine conveying screw. It is claimed that low dosing rates from 10 mg/shot, but also high rates up to 3 g/s (independent of the machine cycle time), are possible, which also makes the system interesting for extrusion applications, according to the manufacturer.

The cylinder dosing units allow small quantities to be dosed simultaneously (figure: Tschritter)

Through the infinitely variable adjustment of the rotation speed and cylinder design, it is claimed that each individual material type can be dispensed in controlled amounts. The flow rate is controlled by three different cylinders, which are available in plastic or stainless steel. The link to other machines of the manufacturer (e. g. feed units) but also to customers’ machines is provided by a control unit (WDx), which, besides formulation control, also features logbook recording and user management, which, in the company’s view, is a positive feature for quality management.

The system is currently patent pending and, according to the manufacturer, promises great potential in dosing technology, where ever faster material exchange and greater precision will be important in future.

Where other cylinder systems reach their limits, the WD system uses a technology that first loosens the pellet stream, repacks it and then meters it in microsteps directly into feed of the injection molding machine or extruder. This results in a uniform pigment or additive dosing rate. According to the manufacturer, the reject rate can be reduced to 0 %, minimizing the material costs. The system is also said to be easy to clean with no wear parts such as scraper bars. Thanks to the rapid response of the system, prompt color and material exchange are claimed to be possible.

Translated from Kunststoffe 10/2015, p. 12.

Company profile

Tschritter GmbH

Industriestr. 2-4
DE 97904 Dorfprozelten
Tel.: 09392 9765-0
Fax: 09392 9765-201

Patents Stimulate Innovation

Patents encourage innovation: Stay on the ball with the latest innovations in the plastics industry in our patents section.

Patents

Newsletter

Would you like to subscribe to our Newsletters on plastics technology and profit from the latest information?

Subscribe here

Subscribe here

Trade Names

You know the trade name but want to know the material manufacturer, type of polymer and delivery form? Search here!

Trade Names