• Injection Mold Design Basics  

    Plastic injection mold is the foundation of the success of  custom plastic part and we mainly discuss the design basics  you need to know when developing your plastic project in this series of articles. Designing plastic injection mold for manufacturability is the first step in making a high-quality part. Before start, we need to understand what is the standard of a well-designed mold.  The basic function of a mold is two fold. Firstly it should impart shape to the part secondly it should cool the molded part. The number of cavities mainly depends up on the production volume requirement. But it is also related to the size and weight of the parts which in turn determines the machine capacity required. It is also important to design a mold that will safely absorb the forces of clamping, injection and ejection. Further more the mold lay out should be balanced which will ensure proper filling and…

    Mold design January 8, 2020
  • Everything you need to know about hot runner mold for engineering polymers

    When injection moulding partially crystalline engineering thermoplastics, choice of the correct hot runner system determines the function of the plastic injection mould and moulded part quality. Here, the temperature must be controlled much more strictly than in the case of amorphous materials. The type of hot runner system used,  and its installation, decide the properties of the finished parts. This article deals with the most important points which have to be considered when choosing the most suitable hot runner system for POM (acetal), PA (nylon), PBT and PET (polyesters). Problems with hot runners Moisture in thegranules Feed system toosmall Wrong gateposition Hold time tooshort Wrong melttemperature Wrong tooltemperature Poor surfacefinish Problems with hotrunners Warpage Moulddeposit   What happens when an unsuitable hot runner system is used? Unsuitable hot runner systems usually cause high pressure losses; they should, if used at all, be operated only at very high temperatures. This will usually cause the polymer to degrade, with…

    Mold design, Mold making January 1, 2020
  • How to Design a Mold(the first part)

      INTRODUCTION The basic function of a mold is two fold. Firstly it should impart shape to the part secondly it should cool the molded part. The number of cavities mainly depends up on the production volume requirement. But it is also related to the size and weight of the parts which in turn determines the machine capacity required. It is also important to design a mold that will safely absorb the forces of clamping, injection and ejection. Further more the mold lay out should be balanced which will ensure proper filling and dimensional control DECIDING THE TYPE OF MOLD There are several types of injection molds in use today. Two plate. Multi plate mold. Hot runner mold Insulated hot runner mold Hot runner manifold stack mold   A two plate mold has got only single day light (one opening). All basic designs of injection molds have this design thought….

  • Everything you need to know about Insert mold  

    What is injection molding process? INSERT MOLDING is a type of injection molding. It is the process of molding thermoplastic material around an metal part to create a finished part that incorporates multiple materials.   The inserts for INSERT Moulds are typically metal stamping or thread parts.   The inserts are most commonly made of metal, typically brass, aluminum or stainless steel.  Threaded inserts are readily available in a number of standard sizes.  Bushings, sleeves and other simple metal forms are also used. Before injection molding, the inserts are placed on a fixed position in the mold and thermoplastics is injected into the mold to form the part. Most moldable thermoplastic resins are compatible with the insert molding process. This kind of products are usually used as structural parts in product development, and the strength requirements of the products are higher, so plastic material containing glass fiber (GF) is often chosen, and the content of GF in…

    Mold design, Mold making December 9, 2019
  • Tips on how to design injection mold gate   

    Gate is defined as an opening on the plastic wall through which the molten plastic is injected into the final part. Gate location can make or break your part design.  Therefore, it is very important to do a pre-analysis to decide the location, size, and shape of the gate as all these can greatly affect everything from the structural integrity to the visual appearance of a finished piece. Yet most CAD designers give little thought as to where to and how to put the gate, or injection point, on the part they design. They simply leave that detail to the mold maker.This is a big mistake. Along with choosing the wrong gate size and type is the root cause of many molding difficulties such as welding line, shrinkage, warp and more. The gate has three critical components namely depth, width and land. Depth is the most important factor because it determines how fast gate solidifies. Generally, gating system is composed…

    Mold design November 29, 2019
  • Everything that you need to know about plastic hor runner mold

    The hot runner is heated to ensure that the plastics of the runners and gates remain in molten condition. Why do we recommend it? If the plastic injection product is large without  using hot runner system, it is prone to occur the defect of shortage shot. Since there is heating rod and heating ring near or in the center of the runner, the entire flow path from the nozzle exit of the injection molding machine to the gate is kept in a high temperature state, so that the plastic through the whole path remains in a molten condition.  Therefore there is no need to take out the condensed resin after shutdown and just heat the runner to required temperature after restart.  In general, hot runner processes are sometimes referred to as hot manifold systems. Advantages and disadvantages of hot runner technologyAds.1. Save raw materials and reduce costs.2, shorten the molding cycle and improve machine efficiency3. Improve the surface quality and…

    Mold design, Mold making November 1, 2019
  •  How to Choose the Right Supplier for your Mold Project?

    As the development of enterprise and society, all electronic products and daily consumer goods are upgraded at a rapid speed. Many product design and development companies are racking their brains to update their own technology to meet the various social demands. Have you ever considered renewing your manufacturing partner’s technology? Here are some tips for your information.   A professional plastic molded company usually owns a technical team that could manage the manufacturing process of plastic injection molds with a complete set of high end equipment including,high speed CNC, Mirror EDM machine, slow wire cutting, precise grinding machine, slow wire cutting, CNC tuning and milling machines, imported injection machines, CMM inspection and more. These shops are suitable t make parts that are perfect in size and cosmetic look. The mold tolerance is around 02mm.     Middle class of injection molders. These shops are equipped with medium equipment, including imported…

    Mold design October 17, 2019
  • 11 Tips on how to design injection mold gate

    Gate is defined as an opening on the plastic wall through which the molten plastic is injected into the final part. Gate location can make or break your part design.  Therefore, it is very important to do a pre-analysis to decide the location, size, and shape of the gate as all these can greatly affect everything from the structural integrity to the visual appearance of a finished piece. Yet most CAD designers give little thought as to where to and how to put the gate, or injection point, on the part they design. They simply leave that detail to the mold maker.This is a big mistake. Along with choosing the wrong gate size and type is the root cause of many molding difficulties such as welding line, shrinkage, warp and more. How to design gate on injection mold then? Firstly, decide what kind of gating systems for your part ,if necessary run mold analysis Secondly, below are some guidelines for designing…

    Mold design October 9, 2019
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