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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.

PTMS always provide customers high quality, reasonable price plastic injection mold and injection molding parts. We also improve ourselves each day and want to be one of the famous injection mold maker in the world. We would like to help more and more companies with injection mold and precision molding parts.


Every people from president to common employee are very responsible for their jobs, our company has strict check-up system for each people, so oversea salesmen try their best to develop business, project team are conscientious for mold design, mold making team are conscientious to make mold. PTMS team is very responsible for injection mold making and precision molding parts production.

Working skills

We train every people skill and ask them to make quality as the first important job, every people would like to care their jobs quality, below are the procedure for customers’ reference:

1. Mold Design

Mold Designer will check customers’ 2D/3D drawings and other related data carefully, also they will communicate with customers for drawings, project engineer also give customers’ valuable suggestions on part design and mold making based on the data, because some customers are not familiar with mold design. So we would provide them excellent solution to save lots cost on mold making and molding parts production.

2. Mold Making

We just choose good partner to work, such as LKM mold base, MoldMaster, Gunther and ect, so we can control the quality effectively. We would check related important dimensions of mold base, cavity, core, inserts, lifter, electrodes. The EDM technician will check every electrodes before EDM processing, the mold maker technician would check all the mold components follow parts drawing before mold testing, before mold shipment, our QC, Mold Designer, Project Engineer and Mold Maker have a meeting, they would check all the mold components approval, care about mold appearance and put mold spec, user manual into package box, we make FAL report with customers' drawing dimension and care about the appearance of metal parts before shipment, QC would check and put FAL report into package box. After the all jobs, the tooling will be shipped to our customers.

3. Injection Molding

Our QC and Project Engineer will check related dimensions which customer approval and plastic part’s appearance, then make instruction documents with signature approval samples for mass production. Every injection molding operator would follow that to do mass production. Before package, QC would spot-check 5-10 pcs samples of each boxes, and before shipment QC would care about the package appearance, then ship to customers.


We always provide customer high quality injection mold and molding parts as their requirements, but sometimes just a little fault will appear when mold design, mold making, injection molding, shipping and etc because of something, but the defective rate is just 0.01%, below are some conditions for your reference:

1. Mold Design

We will design new mold free of charge if the fault is made by us, but we can also re-design it free of charge if a small fault by customers sometimes, design fee will be collected if big fault by customers.

2. Mold Making

We will modify the mold free of charge if fault by us, but we can also modify it free of charge if small fault by customers, modified fee will be collected if big fault by customers. But in the fact, PTMS invest much money on mold modification, even invest much money on new mold making, just want to provide high quality mold to customer, also high quality molding parts, we don't care money loss, just for long time business partner and give value to customers.

3. Injection Molding

We will produce new injection molding parts free of charge if fault by us, but we can also produce small qty if small fault by customers, new injection molding parts production fee will be collected if big fault by customers. Beside we just choose good plastic resin suppliers to work, make sure high quality materials.

But PTMS always reduce the fault and we have a solution for high quality injection molding parts. We will provide new part which reaches the standard 100% free of charge, but customers have to give us the inspection instruction document. Normally in our production procedure customer needs approval the samples and signature on it, send to us for quality control spec, than we will do the mass production accordingly.

CertificationSira Certification

PTMS is an ISO9001-2008 system certificated manufacturer, so we have very strict Quality Control on mold and molding. We always see the Quality is the life line and development base of the company, so we can provide customized inspection services to meet each customer specific requirements, with the capacity to measure both injection mold components and final plastic parts in depth.

Inspection equipments

All components of injection mold and molded precision plastic parts are fully-qualified by our good inspection equipment and QC system.

Inspection Equipments as below:
CMM 800*600 USA 1set
Projector China 1set
2DMI China 1set
Micro Glass 10times and 15times China 2sets
Height Altimeter Mitutoyo Japan 2sets
Block gauge Mitutoyo Japan 1set
Pin Guage Mitutoyo Japan 1set
L-Square Mitutoyo Japan 5sets
Callipers Mitutoyo 0-150/0-200/0-300 Japan 20sets
Micrometer Mitutoyo 0-50/0-100 Japan 10sets
Salt Spray China 1set for Laboratory
Drying Box China 1setCPP
Hardness China 1set

Quality system report as below:

FAI Report-First Article Inspection Report for Molded Plastic Samples
SPC Report-Steady production control For Injection Molding Production
CPK Report for Injection Molding Production
CMK Report for Injection Molding Production
SGS Report for plastic parts
RoHS Report for plastic parts

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