Design Guideline of Automatic Unscrewing Mold  

July 25, 2021

A Guide for Automatic Unscrewing Mold

It is very important to understand that the design plays a vital role in making an Automatic Unscrewing mold. When talking about plastic molded parts the external and internal threads are worth mentioning.

The Automatic Unscrewing mold mechanism totally relies on the design efficiency and preciseness. The external thread comes out of the mold through certain movements. On the other hand, an internal thread of the plastic parts consists of a dual structure. 

Automatic Unscrewing mold

The first one is the forceful ejection and the second one is the Automatic Unscrewing mold. The following is a design guide that shows the importance and working of an Automatic Unscrewing mold.

Automatic Unscrewing Mold Injection Designs

When dealing with automatic unscrewing mold ejection, there is a certain criterion that the mechanism must follow in order to achieve successful automatic unscrewing. The first criterion that the plastic mold must follow is to have a soft gooey texture just like glue and PVC. The entire flow must work in circular motion and shape. Any other shape can hinder the ejection successfully. The profile for these mechanics is quite small hence they must fulfill the required benchmark measurements set by the machine.

Physical Attributes of Automatic Unscrewing Mold

In mechanical terms, the plastic part connects with a pipe. The entirety of the machine consists of very precise dimensions that form the structure required for automatic unscrewing.  

Moreover, the plastic parts connecting with the pipe are in the shape of a cylinder. Most importantly it is vital to understand that all the parts are interlinked with a thread. The thread encircles the entire machine externally as well as internally.

Furthermore, the thread that moves internally is M20 and the M44 thread moves around the external structure of the machine.   The teeth or entrance of the machine are triangular in shape which does not allow easy injection. The most challenging part of the mold design is to introduce a releasing point in the design.

Analyzing the Automatic Unscrewing Mold

Generally, the plastic part in the mold is of rotating nature. In most cases, this mold structure has several cavities. The number of cavities inside the mold body totally depends on the customer’s requirement. When assembling the plastic parts in line with the mold, the thread that moves externally works on pulling mechanics.

While this is happening, the internally moving thread assumes an automatic mechanism for removing the thread. The restricted way in which the structure comes into existence allows the cavities to line up in a longitudinal way. 

Whereas, the plastic parts of the mold work in a cylindrical fashion. The cylinder keeps on rotating to ease the movement of thread throughout the structure. The releasing parts of the mold have a technological placement at the larger end of the structure.  This helps in pouring in and out with uniformity. Thus, it allows each cavity to fill up without complicating the movement of the cylindrical body.

Design of the Automatic Unscrewing Mold

The design part of the mold is movable in nature and undertakes the shape of a mosaic. This amalgamation is important for facilitating the manufacturing procedure and helping the cavities when they need to vent out.

The mold remains in a moveable situation for machining purposes. This ensures quality and easy exhausting technique when emptying the molds out. The mold for automatic unscrewing design consists of a fixed core mold, three moving parts of the mold, a threaded core, and a half block.

Then comes the ejection mechanism that is performed forcefully. It is a complex step that revolves and involves certain types of machinery. These specific tools are roller chains and sprockets. When threading the core, it is important to stop the rotation forcefully.

This sudden movement forces the plastic parts to step up and away. On the other hand, the model allows the cavity to move in the opposite direction of the axis. The gate that guards the structure ejects the plastic parts out of the mold cavity. It all takes place with the help of an ejector pin, a fixing plate, a bottom plate, an axial rod, and a spring.

Temperature Control in Automatic Unscrewing Mold

When working with plastic injection molding, temperature plays a key factor role. It is so far the most focal point of most mechanisms involved in injection molding and plastic machining. Moreover, it highly affects the productivity of the entire procedure.

The right temperature is very vital for manufacturing the right mold. Uneven temperature controls can lead to uneven mold results. In addition to this, it is very important to control the temperature in order to safely line the mold lining. This is important to protect the lining of the mold.

This is why there needs to be a striking balance between cooling and heating the materials that need to go inside the mold. Many manufacturers are using the latest gadgets in controlling temperature for guaranteeing quality and durable molds made out of plastic.

Tiptopmolds is providing a variety of solutions like automatic unscrewing molds. It deals in high-quality results and top-notch injection-molded molds. You can visit Tip-Top’s website to learn more and ask for a quote online as well.


A motor is the core part of the automatic unscrewing and ejection of the thread. The process involves several levels and mechanisms that include motor working with roller chains and sprockets.   Additionally, the guide shows some pros in constructing the desired mold. On average, the transmitting proportion has a high amount of accuracy without slipping.

The overall structure is quite compact which doesn’t pressurize the moving axis. Moreover, the efficacy reaches up to 98% due to the design’s compactness. It has the capacity to carry a high number of kilowatts even at longer distances which reduces the production cost. This enhances the result by tenfold which urges the manufacturers to pay more heed towards the design and sample stages.



Get A Quick Quote