Stack Mold Technology & Application This article mainly decribes about Stack Mold Technology & Application in plastic injection molding. What is Stack mold? Stack mold can be described as a mold assembly consisting of a series of single-face molds of the same size, mounted back-to-back or “stacked” next to the other. Without increasing the plastic injection molding machine platen size or tonnage, stack molds double (or more for increased stack mold levels) the output of standard plastic injection molds, increasing molding efficiency and reducing the overall part cost. Stack molds can also produce multi-component assemblies or a family of parts in one shot on one plastic injection molding machine. Most stack molds have an equal number of the same cavities in each side of the mold, or parting surface, but they can also have different cavities in each mold parting surface to produce a family of parts per shot, with each part being a different…

In this article, we will show you from three aspects to be taken into consideration when designing plastic parts for double injection molding so we can save our customers time and money in the long run.   Mechanical structure     Surface Contact Adhesion is depending on materials compatibility, process temperatures, surface contact area, molding sequence and designing of mechanical interlock systems. If design not allows enough contact surface area, Tooling can make up like Make-up 1 : Increase expose surface byincreasingroughness. Make-up 2 : Employ interlock Wall Thickness Utilize 2nd shot to get more uniform wallthickness  Reinforce the 1st  and 2nd shot(transparent) by structure design such as “H” section etc. Thin but high rib in 2nd short. First shot thicker than 2nd shot. 2nd shot should be as thin as possiblewhen flow and weld line is not a issue. In MP case, 1st shot 0.6mm, 2nd shot 0.6mm was made Avoid sharpcorner Make…

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…

What is flash in two shot injection molding? Description  2nd material penetrating between 1st material and its cavity. It is observed frequently where 1st material shrinkage is big and cooling time for 1  material is too long. It is mainly due to too fast shrinking of 1st material.   How to trouble shoot the flash? 1.Optimizing holding pressure & Cooling time to get min shrinking of 1st material till before 2nd shot molding. 2.Select less shrinkage rate material for 1st shot. 3.Changing design as preventive action. We’ve spent the past 15 years accumulating rich practical experience in solving the flash of two-shot injection molding. HS Mold has the design, engineering, and in-house tooling capabilities you need to streamline your project 2k injection molding project from conception to production.              

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…

These freshly finished inserts are what we recently made for our Polish customers.In fact, we just finished it in just over a week。Customers received these inserts two weeks after placing their order Our factory is equipped with various size of injection machine ranging in tonnage from 55 tons to 610 tons and shot capacities ranging from 1.3 oz to 80 oz. We can meet any of your custom injection molding needs using different types of plastics including ABS, PC, PP, Nylong and so on. We produce custom injection molded finished products and parts for direct shipment to oversea end customers  We produce standard and custom plastic products for various industries including Automotive, House hold application, Medical and more. Since 2005, HS Mold has specialized in custom, high-volume plastic injection molding. Our team are committed to the success of your project and works hard to meet or exceed the project’s requirements

Product name Custom medical device housing Product Material ABS+PC Process Injection molding Runner cold sprue Cavity 1+1 This is a cold sprue injection mold for medical parts and the material plastic is ABS+PC. Our factory is equipped with various size of injection machine ranging in tonnage from 55 tons to 610 tons and shot capacities ranging from 1.3 oz to 80 oz. We can meet any of your custom injection molding needs using different types of plastics including ABS, PC, PP, Nylong and so on. We produce custom injection molded finished products and parts for direct shipment to oversea end customers  We produce standard and custom plastic products for various industries including Automotive, House hold application, Medical and more. Since 2005, HS Mold has specialized in custom, high-volume plastic injection molding. Our team are committed to the success of your project and works hard to meet or exceed the project’s requirements

Overmolding injection process is used in many areas to create finished plastic parts and improve product efficiency. Without the process of,we would not have so many consumer  products that everyone wants and needs. Examples of overmolded products would be packing products,cell phones, toothbrush, computer monitors. So how exactly does the overmolding process work and what kind of defects we may see?     What is overmolding?     Overmolding is also called as  two-shot molding, results in parts in which it is clearly evident that more than one material is being used. It is a kind of injection molding process where only part of a product is molded in one material, and that molded piece is manipulated so the second material can be molded around, over, under, or through it to complete the final part. This method is sometimes referred to as in-mold assembly, since the resulting part effectively acts as an assembly of two materials…

Product name Custom auto part fiberglass Product Material PA+30%GF Product Type Automotive part Process Injection molding Runner Cold sprue Cavity 1X2 This is a cold sprue injection mold for auto parts and the material plastic is   PPA+30%GF。During the mold test, two issus come up. Issue: Too much fiber glass on the part surface Remedy: A.Increase shooting speed   B.Increase injection pressure       Issue: Poor venting and there is air trap on part surface Remedy： Increase mold temperature （tentative measures） Increase shoot temperature(temtavie measures) Improve mold venting （effective solution）     Our factory is equipped with various size of injection machine ranging in tonnage from 55 tons to 610 tons and shot capacities ranging from 1.3 oz to 80 oz. We can meet any of your custom injection molding needs using different types of plastics including ABS, PC, PP, Nylong and so on. We produce custom injection molded finished products and parts for direct shipment to…

Mould type overmold Product Material PC+TPE Product Name Plastic housing for Fingerprint collector Manufacturing process overmolding Runner Cold sprue Color Customized   This is a overmolding plastic part with substrate as PC and the injection overmold is composed of TPE which is softer and more flexible. Overmolding is a great injection molding process that connects two separate parts together to save assembly, to provide color contrasts, or to seal an area or to hide known blemishes (such as parting lines) in the substrate. Here at HS Mold, we have have significant in-house injection molding experience. Our factory is equipped with various size of injection machine ranging in tonnage from 55 tons to 610 tons and shot capacities ranging from 1.3 oz to 80 oz. We can meet any of your custom injection molding needs using different types of plastics including ABS, PC, PP, Nylong and so on. We produce custom injection molded finished products and parts for direct shipment to oversea end customers  We produce standard and…