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The Lifters Design Standard

By Jackie | August 23, 2018 | 0 Comments

1. The lifter is mainly used to form the internal undercuts of a molded plastic part, and at the same time it also offers ejection function. The mechanism features a simple structure but poor rigidity and a short travel distance. The typical structure is shown as below: Most injection mold company usually apply the lifter … Read more

Injection mold sliders designing

By Jackie | August 22, 2018 | 0 Comments

1. When designing the injection mold sliders, the biggest clearance between the slider and the product should be at least 2 – 3mm. The inclination of sliders should be kept between 15 and 25 degrees, and the inclination of the guide pin should be 2 degrees smaller that of the wedge. The available diameters of … Read more

Guide Pins of plastic injection mold

By Jackie | August 20, 2018 | 0 Comments

There are many types of guide pin structures in plastic injection mold application, among which the standard structural design is shown in the figure below. A guide pin has to serve as the cylindrical surface of concentric circles of different diameters. Based on structural dimensions and material requirements, a round steel bar with an appropriate … Read more

Mold texture

By Jackie | August 14, 2018 | 0 Comments

Mod texture Definition Texturing refers to the process that produces various patterns on the surface of a metal product through chemiosmosis, such as stripes, images, wood grain, leather pattern and stain, etc., while also including sandblasting, which means spraying glass sands directly onto the surface of a metal product. The Purpose of Mold Texture Improve … Read more

A Brief Introduction to Ejector Pins Design

By Jackie | August 6, 2018 | 0 Comments

The Purpose of Ejector pins: Eject the molded part from the injection mold. Considerations for the ejection system: 1. Ejector pin holes should be at least 3/32” away from other holes; 2. At least a clearance of 1/32” for pin holes on the ejector plate; 3. At least a clearance of 1/64” for pin holes … Read more

Commonly Seen Mainstream Injection Molding Machines Brands

By Jackie | July 30, 2018 | 0 Comments

The injection molding machine industry has experienced rapid development across the whole globe. Especially, in the era when Chinese manufacturing industry develops at a very fast pace, many Chinese and foreign injection machine brands are widely used in enterprises which produce plastic products. Among them, the more famous ones include Chen Hsong from Hong Kong, … Read more

Lifters or Sliders for Undercuts on Four Sides?

By Jackie | April 13, 2018 | 0 Comments

As mold designers, we are all aware that, in normal circumstances, lifters are created for inner undercuts and sliders are created for outer undercuts. However, when we have undercuts on all 4 sides of a product, which makes it impossible to release the product by force, how should the mold be designed? See the following … Read more

Injection pressure,holding pressure and back pressure

By Jackie | April 11, 2018 | 0 Comments

1.Injection Pressure Injection pressure is exerted by the hydraulic mechanism of the plastic injection molding system. This pressure is transferred from the hydraulic cylinder to the molten plastic through the molding screw, under which the molten plastic will be pushed to flow into the mold sprue (also known as the primary runner of some molds), … Read more

How to set the hold pressure?

By Jackie | April 9, 2018 | 0 Comments

The setting of hold pressure is aimed to prevent resin backflow, while at the same time compensating for resin shrinkage caused during the cooling process, so as to achieve the optimal molding outcome. If the holding pressure is set too high, the product will be prone to flash, over filling or stress concentrating near the … Read more

Material Change and Color Change tips during injection molding production

By Jackie | April 8, 2018 | 0 Comments

Changing material or color in the injection molding process certainly deserves in-depth discussion. A quick color or material change cannot only save time, but also drastically bring down the production cost. 1)Color change – a same material In principle, when injection molding factory change the color of a same material, change from light to dark … Read more