Tag - china plastic injection molding

Draft Angle of Injection Mold

What is the draft angle?
The draft angle is the angle between the side tangential direction of the intersection of the workpiece and the parting surface of the die and the normal direction of the parting surface of the mold.
Why is the draft slope used in injection molds?
Reduce the chance of parts damaged by friction during release
Reduce the chance of wear and damage to injection molds
If necessary, ensure uniform, smooth, scratch-free surface treatment
Ensure other surface finish and texture integrity and uniformity
educe overall cooling […]

Analysis And Solution Of Cracking In Injection Molding

Cracking, including filament cracking, microcracking, whitening, cracking on the surface of parts, as well as cracking and fracture time due to component adhesion, flow path adhesion or traumatic damage. The main reasons are as follows:


(1) Excessive processing pressure, too fast, the more filling materials, injection, holding pressure for too long, will cause excessive internal stress and cracking.
(2) Adjust the speed and pressure of mold opening to prevent the quick and strong drawing parts from causing demoulding cracking.
(3) Adjust the […]

Injection Molding Processing Technology of Two-color Mould

In recent years, with the development and universality of plastic industry. Plastic products are used more and more widely, such as household appliances, instruments, building equipment, automotive industry, daily hardware and many other fields. The proportion of plastic products is increasing rapidly. However, with the increasing trend of plasticization of industrial products and daily products, the strength and accuracy of plastic products are also constantly improving. Therefore, in order to make the mould have better strength and accuracy, it […]

Solution For Sink Mark, Warping In TPE Overmoulding

Most styrene series TPE have a high molded shrinkage that causes the laminated composite to contract more than the substrate (typically PP,ABS,PC,PA, etc.), resulting in bending or warping of the substrate parts. This is especially true for long, thin parts, or parts with a substrate thickness thinner than the coating, or for substrate materials with a lower modulus of elasticity.
This situation can be handled in the following ways:
Selection of TPE materials:

Adopt matrix materials with higher elastic modulus.


Add reinforcing rib […]

Notes for PA Injection Molding

Characteristics of PA: Nylon has the characteristics of toughness, wear resistance, self-lubrication, smoothness, non-toxicity, anti-bacterial and strong water absorption. In addition, its tensile strength and stiffness will decrease sharply with moisture absorption. Then, the size of the finished product varies greatly.
Advantages of PA:
It has high mechanical strength, good toughness, high pressure resistance and elongation strength, twice as much as ABS injection parts.
Nylon injection parts have excellent fatigue resistance, smooth surface, small friction coefficient and good wear resistance. It also […]

5 Standards Of High-end Injection Mold Factory

Injection mold industry from birth to now, through a number of development stages, into the 21st century, with the development of modern industry, injection mold has become an irreplaceable tool. At the same time, all kinds of large and small injection mold factories have sprung up on the land of China. So how to judge when choosing a high-quality injection mold supplier? The five criteria give you a clear assessment.

Understand the basic situation of injection mold manufacturers. Nowadays, the […]

NC Processing Flow of Injection Mold

CNC center has been widely used in the current market. Compared with other machine tools, the mechanical part of CNC center is not different from other lathes, only in the form of control. So how does the CNC machining center work?
CNC machining center is also called CNC machine tool. Generally speaking, the sequence of CNC processing technology should satisfy the following rules:

Milling before drilling


Processing the inner cavity first, then the contour.


According to the sequence of working procedures, tool diameter […]

What performance is required when using injection mold steel materials?

In the process of injection mold processing, the selection of raw materials will play an important role in the overall life of the injection mold and the quality of the plastic products produced. What performance requirements should be achieved when selecting the steel materials for injection molds?

Good surface hardness and wear resistance

The hardness of the injection mold is usually below 50-60HRC. The surface hardness of the heat-treated mold is high. The mold is subjected to large compressive stress […]

Why do we choose injection moulds to produce products?

The sustained development of the plastic industry has also promoted the development of the injection mould industry, so why is the injection mould so popular? The following six points are enough for you to have a basic understanding of injection moulds.
1) High accuracy
As a highly precise processing method, plastic injection moulding process can be used to produce almost any kind of diversified plastic parts. Although there are some design limitations, the manufacturing of injection moulds ensures the high precision […]

Sensor injection accessories copper nuts +ABS processing

Injection molding process is not static, logical, because of the different products, different materials, different injection molding machine and material preparation and so on the different conditions, injection molding process will produce many uncertain factors, so as the injection molding processing workers, according to specific conditions to the corresponding process optimization adjustment is the highest embodiment of injection molding processing technology. Therefore, the processing optimization of injection parts of sensor copper nut +ABS can be carried out from the […]