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.              

What is soft tooling? Soft tooling, or prototype mold is preferred when we need injection molded parts quickly or at a lower cost.  It is also great choice for low volumes. We can use soft steel such as NAK80 or  aluminum to build the soft mold in house. Once the mold has been completed,  we can make your parts in-house using our ton injection molding machine ranging from 50Ton to 650Ton.  The soft tooling is featured as below.   The tooling inserts are made using 718 HH or Nak 80, (preharden 33 to 38 HRC). Inserts can be drilled, milledand grindedusing normal process of machining. The tool life is guarantee up to 500 K shotwhile aluminium mold up to 10K shots. The lead time is shorter compare to hard tool. For Proto Tool or toolingwith low volume requirement. What is hard tooling? Hard tool is production tooling that requires high quality . The core and cavity is usually made of the…

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…

What is Acrylic Injection Molding? PMMA, also known as Acrylic or organic galss, is widely used in Plastic Injection Molding process. It is an environment friendly and 100% recyclable material. The clear thermoplastic homopolymer is often used as a more resistant alternative to glass. Acrylic is the most common type of clear, moldable plastic available to the general public, and it can be used from anything to windows and picture frames to fake nails and paint. In vehicles, PMMA sheets are used in windows of cars, interior and exterior panels, motorcycle windshields, instrument covers, spoilers, fenders, and other ancillaries.It facilitates the benefit of design customization for car manufacturers, owing to its exceptional formability, pleasant acoustic properties, and excellent surface hardness. The automotive industry has been witnessing growth, in terms of, both, investments and production, especially in countries in the Asia-Pacific region, such as India, Indonesia, Malaysia, and Thailand.Moreover, regions, such as North America and Europe,…

Injection molding makes possible mass production of intricate, high performance, tight tolerance parts with very little secondary labor and minimal waste. It is defined as a process of shaping plastic by melting it and injecting it into a predesigned mold. As known, plastic injection molding has a bevy of advantages and benefits over comparative plastic processing and manufacturing methods. Here’s a look at the top 11 benefits of plastic injection molding.   1.High production rate There is a reason why plastic injection molding is one of the – if not the most common – technologies for long manufacturing runs: it’s fast. How fast? While the speed depends on the complexity of the mold itself, generally only about 15 to 30 seconds pass between cycle times. 2.Large Volume production The initial creation of a mold can be expensive, with the cost being a few thousand dollars.   But once the mold is built you can…

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 switch box Product Material ABS+PC Injection molding machine 160T Process Injection molding Runner Cold sprue Cavity 1X2 This is a cold sprue injection mold for custom switch box and the material plastic is ABS+PC.No flash on the surface, and the product assembly effect is very nice！details make a difference！ 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…

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 Product Material POM Product Type Automotive part Process Injection molding Runner Cold sprue Cavity 1X1 This is a cold sprue injection mold for auto parts and the material plastic is POM.POM material has a low melting point,have a pungent smell after melting, is prone to air marks, and is difficult to change through tuning ..During the mold test, two issus come up. Issue: Too much delamination on the part surface.   Remedy: A.Increase shooting speed   B.Improve mold venting     Issue:Demolding difficulties and there is delamination on part surface Remedy： This peeling is because there are other rubbers in the barrel, and other rubbers should be cleaned first. The front membrane receives hot water. Improved mold release through thermal expansion and contraction TIP: The shrinkage problem of POM products is serious, It is best to cool the freshly produced product in cold water first. Our factory is equipped with…

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…