Tag - china custom injection molding

Causes and solutions for swelling and bubbling of injection molding parts

Some plastic parts after demoulding, have swelling or bubbling on the back of metal insert or in the extra thick parts. This is due to the expansion of the released gas under the action of internal pressure on the plastic which has not been completely cooled and hardened. JasonMould works with you for details.

Effective cooling. Reduce mold temperature, prolong tooling time, reduce drying and processing temperature.


Reduce the filling speed, reduce the forming cycle and reduce the flow resistance.


Increase the […]

Why is it so expensive to open a set of plastic mould?

“Why is the cost of mold opening so expensive” is probably the voice of most customers! But in the eyes of Xiaobian, there is a trace to follow when opening a set of plastic mold.
1) Plastic mold belongs to customized products, not ordinary standard parts.
2) The difficulty degree of product structure determines the difficulty degree of mold processing. The more complex the mold processing, the more manpower and material resources it takes.
3) The cost of mold steel used in […]

Lettering on the surface of injection mold

We often see all kinds of patterns and Numbers on plastic pieces, and these Numbers are different. How to carve these Numbers and patterns on these molds, we have these kinds of common methods.
The first is directly through the engraving machine engraved on the mold. This is usually used when the font or pattern is large. Usually the resulting font has a knife cut on the surface and needs to be polished.
In the normal small – and medium-sized mold, […]

Cracking of common problems in injection molding

Cracking is a common defect of plastic products, which is mainly caused by stress and deformation. It mainly includes residual stress, external stress and stress deformation caused by external environment.
(I) cracking caused by residual stress
The residual stress is mainly caused by the following three conditions, i.e. overfilling, demoulding and pushing out and metal inlay. As the cracks produced in the case of excess filling, the solution can be mainly in the following aspects:
(1) since the pressure loss of the […]

What information should be provided to the manufacturer for the injection molding process?

Many customers need injection molding after a product is newly designed. When a new product needs tool making, what information should the customer provide to the manufacturer?
JasonMould shares you a general idea of what is required for tool making and injection molding.

3D CAD file of product.
Bill of material ( including materials required for products and surface finishing requirements etc.)
Batch quantity.

With the above information then we can offer you an accurate price.
About JasonMould Industrial Company Limited

Jasonmould is a China mold maker of plastic […]

Common problems in injection molding insufficient filling

The main reasons for insufficient filling are as follows:
1) insufficient resin capacity.
2) insufficient pressure in the cavity.
3) resin fluidity is insufficient.
4) poor exhaust effect.
As an improvement measure, we can start from the following aspects:
1) lengthen the injection time to prevent the resin countercurrent before the gate solidification due to the short molding cycle, which makes it difficult to fill the mold cavity.
2) improve the injection speed.
3) increase the mold temperature.
4) increase the resin temperature.
5) increase injection pressure.
6) enlarge gate […]

What Are The Two Part Of a Plastic Injection Mold?

Injection molding is a processing method used in mass production of complex parts. Specific principle refers to: heat melting plastic raw materials by injection molding machine screw into the mold cavity, after cooling and curing, plastic forming products.
The plastic mold consists of two parts: moving mold and fixed mold. The moving mold is installed on the moving template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During […]

How to avoid deformation in mould manufacturing

In the process of mold manufacturing, deformation often occurs, so how to avoid the deformation in mold manufacturing?
(1) the thickness of the product shall be as uniform as possible.
(2) all parts of the cooling system are designed to make the cavity temperature uniform.
(3) the pouring system can make the material flow symmetrical, avoid warping caused by contraction in different flow directions, and try to eliminate the density difference, pressure difference and temperature difference in the cavity.
(4) the thickness of […]

Why Do Injection Moulds Need To Be Tested?

Defects in most injection molding products are caused during the plasticizing and injection phases of the injection molding parts, but are sometimes related to design irrationality, including the type of injection port, the number of mold cavities, location and size, the design of the cold and hot runner system, and the structure of the product itself. Therefore, in order to avoid product defects caused by mold design, we need to analyze the injection mold during production.
After the test results […]

What should we do to control the quality of plastic mould?

Now the plastic mold industry has higher and higher requirements for machine equipment and testing instruments! The price of CMM and other testing equipment is also increasing, which shows that the improvement of quality is the future development direction of the whole plastic mold industry. After more than 10 years of continuous exploration and learning, Shenzhen Mingyang Yutong technology has summed up that to ensure the quality of plastic mold products, it is also necessary to strictly control each […]