Dopak Knowledge Center
The effect of a gramophone record as a defect of the moldings
The surface defects of the moldings include the effect of a gramophone record. It resembles grooves on a gramophone record and hence the name of this defect.
Underflows – how do they arise and how to eliminate them?
When producing a part by injection molding, it can happen that the contours of the molded part are not fully formed, which is the result of a not completely filled cavity. So-called undersupply, or short-shots, then develops. However, by changing the appropriate injection parameters, we can quickly eliminate this disadvantage.
Construction and operation of injection molding machines
More and more sectors of the economy use the technology of processing plastics. Knowing the principles of operation and the design of the injection molding machine will allow you to understand how much you can gain by using these machines . Thanks to it, you will receive not only the highest quality products, but also [...]
Where do ruptures come from and how to eliminate them?
Lugs, also called outflows, are very common surface defects of moldings obtained by injection method. Learn the causes of occurrence and ways to eliminate them.
Advantages of electric injection molding machines
If your company cares about the rational management of resources and the image of a modern enterprise for which ecological issues are a priority, it is worth considering electrically powered machines. Find out about their advantages.
The central feeding and drying system is the future
Whether in series production based on one type of plastic or in complex production processes that use many types of plastics and additives, a good feeding and drying system is an indispensable solution. Find out about the benefits it brings for the company.
Plastic grinders – what do you need to know before buying?
In order to properly select a mill and obtain a product ideally suited to your needs, it is worth paying attention to several aspects. A more accurately selected mill will allow you to obtain a very good-quality grinding, will serve for many years and will pay for itself quickly.
Electric or hydraulic injection molding machine?
10 facts and myths about injection molding machines to consider when making your decision.
Save energy with FlexControl RHYTEMPER®
Temperature control systems in the injection mold FlexControl RHYTEMPER® is a technology that allows, among others to shorten the cycle time, obtain better production results, improve the quality of moldings in the area of secondary shrinkage.