plastic injection molding knowledge

Eight Common Injection Mold Structure Classification

14/01/2023

Eight common injection mold structure classification One. Single parting surface injection mold When the mold is opened, the movable mold and the fixed mold are separated, so as to take out the plastic parts, which is called single parting surface mold, also called double-plate mold. It is the simplest and most basic form of injection mold, which can be designed as single-cavity injection mold or multi-cavity injection mold according to the need, and is the

Injection Mold Manufacturing Process And The Basic Processing Process Analysis

14/01/2023

Injection mold manufacturing process and the basic processing process analysis The injection mold manufacturing process mainly includes. Acceptance of the task. Mold design. Mold manufacturing. Mold inspection and mold trial. Mold modification and repair. Mold maintenance. I. Acceptance of tasks Plastic mold making, first of all, the customer engineers provide product drawings to the mold manufacturer, the manufacturer through the molding plastic production task requirements, the process of collecting, analyzing, digesting product data, this is

The Difference Between Injection Moulds And Plastic Moulds

14/01/2023

The difference between injection moulds and plastic moulds Many people can’t tell the difference between injection molds and plastic molds, and many people even think that they are the same kind of molds, just called different. Although injection molds and plastic molds are both molds, but there is a difference between them. Want to figure out the difference between the two, first and Xiaobian together to understand what is injection mold, what is plastic mold.

Must-know Knowledge Of Injection Molding Mold Design

14/01/2023

Must-know knowledge of injection molding mold design What are the major systems of moulds? Pouring→Ejecting→Cooling→Forming→Exhausting What issues should be paid attention to in the process of doing mold design? 1、The wall thickness should be as even and common as possible, and the slope of demoulding should meet large. 2、The transition part should be gradually, round and smooth transition. 3、Gates. The runner should be as wide as possible, thick and short, and the location of the

What Are The Characteristics Of Injection Molds?

14/01/2023

What are the characteristics of injection molds? 1. The cavities and cores are three-dimensional. The cavity and core directly form the inner and outer shape of the plastic part. These complex three-dimensional surfaces, especially the blind holes in the cavity, are very difficult to process. The traditional processing method requires high skill level of workers, and more auxiliary tools and long processing time. 2. It has high requirements for precision and surface quality, and also

How Are Injection Molded Products Formed?

14/01/2023

How are injection molded products formed? An injection mold is a hollow block of metal into which molten plastic is injected to form a specific shape. The injection mold is drilled with many holes for temperature control through hot water, oil or heaters to ensure perfect molding of the injection molded part. The molten plastic flows into the mold through the gate and fills the cavity through the runners and gates. The mold is then

What is a precision injection mold?

14/01/2023

What is a precision injection mold? A precision injection mold is a device to obtain a product of a certain shape after injecting resin material into a metal model. In fact, in order to control the temperature of the mold, there are cooling holes, heaters and other devices on the mold that allow the refrigerant to pass through. The material that has become molten enters the main flow channel and enters the mold cavity through

What Are The Technical Points Of Plastic Crate Injection Moulds?

14/01/2023

What are the technical points of plastic crate injection moulds? In addition to the daily use and maintenance of the crate mold life, another thing that determines the life of the mold is the mold steel and mold design. First of all, we should choose the right steel material for the mold frame and mold core cavity part. For example, to produce a pair of one out of one crate molds, you must use hard

The Role Of Injection Mold Gate

14/01/2023

The role of injection mold gate It is a channel that connects the main flow channel (or manifold) to the cavity. The cross-sectional area of the channel can be equal to that of the main flow path (or manifold), but it is usually reduced. Therefore, it is the smallest part of the entire runner system. The shape and size of the gate have a great influence on the quality of the product. The function of

A batch of injection mold moving pictures to let you understand all the plastic process!

14/01/2023

Plastics, a polymer, have a wide variety of processing methods. Each method has its advantages and disadvantages and is better suited for a specific application. Let’s see how they are processed next with the relevant interesting motion pictures! Injection Molding Machines Injection Molding Injection molding is a manufacturing method in which parts are made by injecting material into a mold. The primary method of processing plastic is injection molding. In this process, the plastic is

Causes And Solutions Of Shock Lines, Swelling And Bulging In Injection Molded Products

13/01/2023

Causes and solutions of shock lines, swelling and bulging in injection molded products The surface of rigid plastic parts such as PS, etc. near the gate forms dense corrugations centered on the gate, sometimes called shock lines. The reason for this is that when the melt viscosity is too large and the mold is filled in the form of stagnant flow, the front-end material quickly condenses and shrinks when it touches the surface of the

Reasons For Fusion Joints In Injection Molded Products

13/01/2023

Reasons for fusion joints in injection molded products When molten plastic meets in multiple strands in the cavity due to holes in inserts, areas with discontinuous flow rates, or areas where the flow of mold filling material is interrupted, linear fusion joints are created because of incomplete fusion. In addition, fusion joints are also generated in the case of gate injection filling, and the strength of the fusion joints is poor. The main reasons are

Causes Of Silver Lines In Injection Molded Products

13/01/2023

causes of silver lines in injection molded products Silver pattern of injection molded products, including surface bubbles and internal pores. The main reason for the defect is the interference of gas (mainly water vapor, decomposition gas, solvent gas, air). The specific causes are analyzed as follows. 1. On the machine. (1) barrel, screw wear or over rubber head, over rubber ring exist material flow dead space, long-term heat and decomposition. (2) heating system out of

Analysis Of The Causes Of Uneven Color And Luster Defects In Injection Molded Products

13/01/2023

Analysis of the causes of uneven color and luster defects in injection molded products The main causes and solutions of uneven color of injection molded products are as follows. (1) Poor colorant diffusion, this situation often makes patterns appear near the gate. (2) Poor thermal stability of plastic or colorant, to stabilize the color tone of the parts, the production conditions must be fixed strictly, especially the material temperature, material quantity and production cycle. (3)For

The Causes And Solutions Of Transparent Defects In Injection Molded Products

13/01/2023

The causes and solutions of transparent defects in injection molded products Melting spots, silver lines, cracks polystyrene, plexiglass transparent parts, sometimes through the light can be seen some shiny filament-like silver lines. These silver lines are also called scintillation spots or cracks. This is due to the stress in the vertical direction of the tensile stress, the use of the right polymer molecules heavy flow orientation and the unoriented part of the folding rate differences

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