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  • The Stages of Injection Molding
    The Stages of Injection Molding

    Injection molding parts are widely used in many industries, but how to produce such plastic parts? Many people like plastic products but they do not know how it is produced, so now we will share the production knowledge - the stages of injection molding to the worldwide people. If you need high quality injection molding, firstly we should make high quality injection mold, also called injection tooling or injection mould, besides, we need the right injection molding machines to produce the injection molding parts, so all is clear, the stages of injection molding include: 1. Granulated or powdered thermoplastic plastic is fed from a hopper into the Injection Moulding machine. 2. The Injection Moulding machine consists of a hollow steel barrel, containing a rotating screw (Archemidial Screw). The screw carries the plastic along the barrel to the mould. Heaters surround the barrel melt the plastic as it travels along the barrel. 3. The screw is forced back as the melted plastic collects at the end of the barrel. Once enough plastic has collected a hydraulic ram pushes the screw forward injecting the plastic through a sprue into a mould cavity.  The mould is warmed before injecting and the plastic is injected quickly to prevent it from hardening before the mould is full. 4. Pressure is maintained for a short time (dwell time) to prevent the material creeping back during setting (hardening). This prevents shrinkage and hollows, therefore giving a better quality product. The moulding is left to cool before removing (ejected) from the mould. The moulding takes on the shape of the mould cavity. You will know how to produce injection molding if you read the blog, PTMS would like to learn and share more and more data of injection molding with people who like injection molding, if you need our service, please send us RFQ or send e-mail to sales@ptms-mold.com. 

  • Injection Molding Process
    Injection Molding Process

    Plastic injection molding parts is widely used in Automotive, Home Appliance, Medical, Printer, Plastic Tooling,Defense and Electronics industries. PTMS as a professional injection molding manufacturer, we would like to share injection molding process to people who are interested in injection molding. The details of injection molding process include: 1. close mould - the moving and fixed platens of the injection moulding machine hold the mould tool together under pressure. 2. injection - the molten plastic that has been melted from pellet form in the barrel of the moulding machine is injected under pressure into the mould. 3. cooling - the plastic parts are then allowed to solidify in the mould. 4. opening - the moving platen moves away from the fixed platen separating the mould tool. In the fact, the injection molding process is very interesting, the injection machines are very important for production, our company has 20 sets advanced auto injection machines for mass production. If you like to know knowledge about injection molding, welcome to send us RFQ to sales@ptms-mold.com.

  • Many Customers Like to Work with PTMS
    Many Customers Like to Work with PTMS

    As a professional injection mold manufacturer, PTMS always provide customers high quality injection tooling and injection molding with reasonable price, also perfect service all the time. So 99% of the customers like to work with us, they also would like to introduce other friends to cooperate with us. One of our customers introduced a good business partner to us this week, this new company like our high quality and perfect service for injection tooling, so they were happy to work with us, they will send us the samples for check and ask us to make injection tooling this month. Our project team will make design for the project, we can provide full service for this, such as design, mold making, injection molding, assembly. If you have injection molding project, welcome to send us RFQ, we will study it and give you valuable solution, our business email is sales@ptms-mold.com.

  • High Quality Plastic Injection Mold Making
    High Quality Plastic Injection Mold Making

    PTMS is a professional high quality custom plastic injection mold and precision injection molding parts manufacturer in China . As an ISO9001-2008 certified plastic injection molder, we offer an one-step service include excellent engineering, mold making, close-tolerance injection molding, tooling manufacturing, precision machining and prototype for product pre-check services for a complete custom manufacturing experience. PTMS work with a variety of injection mold configurations and a summary of available options can be found here, Mold Types as below: Prototypes Injection Mold       Multi-Cavity Injection Mold         Family Injection Mold Unscrewing Injection Mold     Over-molding Injection Mold      Hot Runner Injection Mold Die-Casting Mold          Silicone Compression Mold        Thermoset Compression Mold In business since 2002 , we offer valuable solution from plastic injection mold design to injection molding parts assembly and our products are widely used in Automotive , Home Appliance , Medical , Printer , Plastic Tooling , Defense and Electronics industries , some of our customers are from Toshiba , TDI-Arms , BMW , etc. Our company always provides high quality products with reasonable price and perfect service to the worldwide customers. So if you need high quality injection molds and injection parts, please feel free to contact us by sales@ptms-mold.com.

Product Assembly
PTMS has been providing plastic injection mold and injection molding parts to the worldwide customers, also die-casting, metal stamping, precision CNC machining parts, etc. So we would like to provide assembly service as customers’ need.

Secondary operations

Vacumm LineWe invested 1 secondary operations shop for painting, printing and assembly according to customers’ need in 2011. So our company can make additional service and make much more value for customers, the shop will provide painting for plastic parts or metal parts, printing stamping for plastic parts or metal parts, product assembly and package, etc. We also set up 2 new assembly lines for product assembly according to our new R&D office requested.

We invested 2nd operation processing shop but our capability for this is limited so we have to choose good 2nd operation processing plants in Shenzhen, our assembly shop is very strict with the 2nd operation processing partners, they should have much experience in plating and EVA package and others. We got a good partner for EMI plating as Vacuum Plating Factory in 2012, so we can provide vacuum plating.

Subcontract service

Assembly LinesWe have 2nd operation processing shop but we can’t provide all services to customers, so our company also can subcontracts service to close partners for customer if needed.The other 2nd operation processing service include laser printing for plastic parts or metal parts, hot printing for plastic parts or metal parts, plating for plastic parts or metal parts, clean room injection molding 100K class, complex product assembly, etc.

Our 2nd operation processing plants are very experience in printing, plating and laser printing, etc. The plants are very honest to PTMS, because we are long time business partner for many projects and they can control the quality and the total cost in a reasonable price, they have experienced QC technicians and many advanced inspection equipments, so QC will inspect the parts and defective parts will be taken out, the people will make new high quality parts for customers.

The plants can make the high quality parts with reasonable price. We are very strict with the plants and make value to them and the plants always make the high quality, reasonable price parts and perfect service to our customers. If you want to know product assembly gallery please check our product gallery site.


We have much experience in secondary operations and assembly for plastic parts and metal parts, in the same time, our company can control the quality and total cost. That’s to say, our assemble shop can do assembly with various product and for many industries.

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