injection moulding solutions

China plastic Mold is a professional injection moulding solutions company, offering customers the best injection molders solutions service.

First we will share you some plastic injection molding knowledge:

Thermoplastic plastic injection molding method that is molten plastic material and then injected into its membrane cavity.Once the molten plastic into the mold, according to it by cold-like cavity molding into a certain shape. The shape is usually the final product, or as in the installation of the final product is no longer required before the use of other processing. Many of the details, such as the Department of uplift, rib, screw, can step in the injection molding operation out. 
injection molding machine has two basic components: for melting and plastic injection into the mold and die equipment installations. Die devices and the role is 1. The mold injection withstands the pressures of closure; 2. Products will be removed in the plastic injection devices inject die before their melting and then control the speed and pressure injection mold to melt. The current injection devices have two design: Screw pre-plasticizing or a two-stage device and reciprocating screw. Screw pre-plasticizing for the use of pre-plasticizing screw (first level) then injected into molten plasticinjection materials (second level). 
Screw pre-plasticizing of molten advantage is the quality of constant, high pressure and high-speed, and precision of the injection volume control (using both ends of the piston stroke thrust mechanical device). These strengths are transparent, thin-walled products and high production rate required. Its weaknesses include the uneven length of stay (leading to material degradation), high cost of equipment and maintenance costs. 

plastic injection mold design

China Plastic Mold is a professional plastic injection mold design company, offering customers plastic injection molding design services.

Our usual plastic injection mold design progress:

The mission statement of acceptance 
Molding of plastic component tasks normally made by the component designer, which reads as follows : 
After certifying the formal system component drawings, and annotated using plastic brands, and transparency. 
plastic component manuals or technical requirements. 
Production output. 
plastic Products samples. 
Usually mold design task by the plastic component craft molding plastic component under the proposed mandate, mold designers for molding plastic component tasks, mold design task based on the design mold. 
The collection, analysis, raw data digest 
Collating the component design, molding technology, molding equipment, machinery processing and special processing information for the preparation of design Die use. 
plastic Products plans to digest and understand component uses plastic component analysis of the technology, size precision technical requirements. For example, plastic component in the appearance of shapes, color transparency, the use of performance requirements is what plastic parts of the geometric structure, gradient, inlay pieces such as whether the situation is reasonable, melt lines, such as pipe molding defects permission, whether painting, plating, bonding, such as drilling after processing. Choice of the precision plastic component size of the maximum size for analysis to see whether the estimated molding below the tolerance of plastic component tolerances can meet the demand from molding plastic component to. In addition, we must understand the plastics and plastic molding process parameters. 
Digestion of information technology task analysis made by the molding methods, equipment type, material specifications, structure type Die request is appropriate, can be implemented. 
Molding Material plastic Products should meet the strength requirements, has good mobility, homogeneous and isotropic, thermal stability. According to the use of plastic component, molding materials should meet staining, is gold-plated conditions and decorative properties, the necessary flexibility and plastic, transparent or reflective properties contrary, adhesive or welding sexual demands.

CNC Machining / EDM Mold Making Equipment & Press List

We’re proud of our high tonnage German and Japanese presses that can comfortably generate 100 tons to 2600 tons with shot sizes of 360 ounces and better.

But we’re also proud of our mold making department. We have late model CNC lathes, grinding machines, linear cutting machine and press, precision wire cutting machines, milling machines, EDM systems, NC welding, German laser cutting machines, Waterjet cutting boards, and precision measurement equipment.

So starting with your metal mold CNC milling to the EDM process all the way down to your actual plastic injection molding, we’re here to handle your project from start to finish.

Plastic Mold Maker News

Introduction to Dip Molding and Coating
Candle making is probably one of the earliest dip molding/coating processes used in the industry. It is still in use today. Dip coating has also been an important branch of food processing. For example, chocolate and/or caramel are often coated on many nuts, cookies, and dry or fresh fruits. Dip molding and coating were widely used even before plastic materials were invented. In this context, however, the scope of discussion is limited to plastic manufacturing processes.

Dip molding is a plastic mold manufacturing process where a heated metal mandrel(mold) is immersed in a tank of molten polymer resin such as plastisol. The plastic is coated/formed around the mold. The hotter the mold and the longer the dip, the thicker the coating. The mold is then extracted from the bath and goes through a curing or cooling process. The part is stripped from the mold after is cured or solidified. Even parts on complicated molds can be stripped relatively easily because the material is quite elastic. The part may need to be dipped more than once to achieve the desired thickness. Examples of dip molded products are surgical gloves, plastic bags, handlebar grips, and so on.

Dip coating is very similar to dip molding except that instead using a mandrel, an actual part is coated by the desired plastic material. The plastic coating provides a protecting layer as well as a better-looking finish. Multi-dipping can be used when two or more different material characteristics or properties are needed for a single product. The coating does not have to be smooth and shiny. It could be an open or closed cell foam, it could be matte or textured, i could even simulate the look and feel of suede or leather.
Plastisol is the most common dip molding material. It is a mixture of suspended plastic particles (usually PVC) dispersed in a plasticizer. As a liquid, it can be stored at room temperature for years. Once heated, the two components fuse into a vinyl, never to liquify again. Plastisol can be formulated to produce vinyls with almost any durometer, clarity, color, and a variety of chemical and electrical properties.

Other common candidates for dip molding are latex, neoprene, urethane, epoxy, etc. Recently, polyurethane and Silicone are often used to replace latex to avoid allergy related issues.

To control the thickness and the quality of the finish, the following parameters need to be carefully managed in the dip molding process:

* Temperature of the mold
* Temperature of the resin
* Speed of dip-in
* Bath time
* Withdraw speed

Pros and Cons of Dip Molding

* Short lead time
* Suitable for fast prototyping
* Low initial setup (tooling) costs
* Low production costs
* Complex parts can be easily stripped from the mold because they are highly elastic


* Relatively slow in production
* Precision control of the wall thickness is a challenge


Customer satisfaction has always been the ultimate goal of ST Plastic Molding Company. While our machines sell around the world, our service is as well pervaded over every corner of the world. In order to enhance quality service, ST plastic Molding company provides an experienced professional engineering team at customer service. Not only that the engineer must undergo continuous training sessions, but who also need to adapt new information and technology worldwide, as it is to integrate ones technical knowledge, as well as to upgrade ones competitiveness in the industry. As a team, we wish to provide the best quality products and services to the world. It is the forever principle of GC Mold.
• Turnkey Solution
In the world of globalization, to keep abreast of world trends, we provide a series of turnkey solutions as additional services for the plastic industry. The mission is carried out by our experienced technical team for visiting and counseling clients from around the world. In China, we have remarkably carried out many successful cases. Our service includes total facility automation standardization, planning, design, manufacturing, install, turnkey and service maintaining. We are also in charges of equipment, solutions, and materials planning in respect to the various demands of our customers.
• Service Location and Distribution
Our high quality machines and innovative service are distributed worldwide, which include North America, Europe, Middle East, Southeast Asia, China, and Taiwan. Our maintenance stations can be found in the regions listed. Our technicians residing in these areas are ready to provide the fastest professional service to our clients.
• Technical Support
In case of any questions, we recommend to use facsimiles, e-mail , or telephone to contact us . Our technical personnel will be glad to serve and provide you the most satisfactory and instant solution.
• Installation Service
Our technicians will be dispatched to the customer’s location for machine installation and installation counseling, as well as operational counseling and training.
• Professional Mold Testing Service
Professional mold testing is available when customer provides the mold. Combined shipment for delivery is available after testing.
• Quality Assurance
A one-year warranty available for new machine under normal operation.
• Sufficient Parts Supply
We supply sufficient parts with reasonable prices and quick delivery. Prior to delivery, inspection is conducted to ensure quality control.
• Periodical Itinerancy Maintenance
The periodical itinerancy maintenance service conducted by our engineers and technical team ensures the best performance of customer’s machines.
• Customer Satisfaction Survey
To upgrade our quality & service, we dedicate in conducting surveys regarding customer satisfaction in both quality and post-purchase service. The mission helps to ensure machine qualities and the improvement of customer service.

Looking for plastic molding company to support youe buiness? Go to

Plastic Mold Design

We Provide Plastic Molding Design Services

If the product consists of more than one component, determine if the components can be combined into a single injection molded part, eliminating extra materials, molds, molding operations, and assembly procedures? Can integrating them into the molded part eliminate hardware or other components? Caution should be exercised in that some cases, trying to design multiple features into a single component can result in a complex part that results in the tooling to be more expensive or the part too difficult or unreliable to mold. This is especially true when the mold must open in many directions to eject the molded part.

Selecting Material

There are a wide variety of injection moldable thermoplastic materials. Often, material the used is selected based on experience one that the molder or material supplier recommends. Unfortunately, proper material selection can be a complex process. The plastic designer should consider the following criteria.

Operating Temperature Requirements

Determine the normal and extreme operating temperature requirements of the component, which you are designing. The plastic, which, you select, should have the capability to withstand the normal, as well as extreme, operating temperature required of the product. Be sure to check shipping temperatures, sources of internal heat, and any assembly or finishing operations that may expose the component to extreme temperatures. Mechanical and electrical properties usually depend on temperature.

Consider the operating load and stress levels that, the component will be subject to.  The operating stress is a significant consideration in many applications. Elevated stresses on a component tend to decrease the components resistance to the operating conditions.  Stresses incurred during snap fits, molding operations, forming or assembly

Operating Environment
Every substance, solid, liquid, or gas that can come in contact with the plastic part over its expected life span should be considered for chemical compatibility. If the compatibility information is not obvious from the product literature, the designer should consult the material supplier and/or request or conduct specific testing if necessary. Some plastics are highly susceptible to erosion, or similar damage when exposed to particular substances.

Check to ensure that the proposed material lends itself to the expected assembly operations. For example, certain classes of materials are difficult to solvent bond, while others may not work well with ultrasonic methods or thermal processes

Determine whether plastic resin can be easily molded into the proposed product with the desired final appearance. If not, can the part be easily and economically finished.

To determine the economics of using a particular resin, consider the cost per pound in the applicable color and purchase volume. In addition, look at the specific gravity and typical molding cycle times of the particular resin grade, since these affect the final molded part cost. The cost per unit volume of a particular plastic resin (or any material) is as follows:

Cost/in.3 =0.0361 x Specific Gravity x Resin Cost/Pound
The material cost of a part is obtained by multiplying the cost/cubic inch by the part volume. Finally, a very rough part cost estimate is obtained by doubling the material cost of the part.

Check to see that the chosen resin will be readily available in sufficient quantities when needed for production.

Plastic Injection Mold Manufacturer

We specialize in manufacturing a variety of Plastic Injection Molds, like plastic caps plastic Injection molds, Injection Molds for screws, gears, buckets, Plastic Injection Molds for bottles, electronic components and all Molds for injection molding and blow molding. In addition, our company makes and exports more than 1000 moulds for the various plastic industry companies around the world.

We have advanced CNC Machine, EDM Machine, Wire-Cutting Machine(including low-speed), Milling Machine, Grinding Machine and state of the art processing machinery.

Our plastic products manufactured strictly comply with ISO9001:2000 spirit and regulations. Being authorized “Glory” brand with advanced equipments and machinery awarded “Quality Appreciation Brand” by Philippines Technical Supervised Intelligence Bureau in the year 2009.

We know our market demands High-quality service for forgen and domestic Market. Our moulds have been exported to US, UK, Australia, France, Saudi Arabia, Costa Rica, Russia, Syria, Japan, India etc.


This is a process that creates a skin and core material arrangement in a plastic molded part. The skin material is injected first into the mold cavity and is immediately followed by injection of the core material. As the skin material flows into the cavity, the material next to the cavity walls freezes and material flows down a center channel. When the core material enters it displaces the skin material in the center of the channel by pushing the skin ahead. As it flows ahead it continues to freeze on the walls producing the skin layer.

Machine Based Co-Injection molding
The Co-Injection molding process requires two injection/processing units. The units generally inject material through a manifold located at the end of the injection barrels. The manifold ports the two melt streams into a centrally located nozzle. The machine controls the injection units to achieve a skin-core-skin flow sequence through the manifold into the mold. Last skin flow is needed to clear the short nozzle section of core material and to seal the gate area with skin. This arrangement can be used on any single or multiple cavity, conventional cold runner mold.

Mold Based Co-Injection molding
This same process can be achieved on a hot runner mold by utilizing a hot runner system from Incoe Corporation of Troy Michigan. This system, sometimes identified as “Mold Based Co-Injection”, still utilizes two injection units. The two melt streams are directed into the mod via separate channels. These two channels remain separate until they reach the gate area of the part. At this point they flow through a nozzle arrangement similar to the normal co-injection manifold.
Co-Injection Benefits

Lower Cost PartsHigher Strength CoreSound Absorption CoreReduced Cooling Time for Lower Temperature CoreImproved Aesthetic QualitiesCombined Property Characteristics
Co-Injection Features of a Milacron Machine

Independent Co-Injection Manifold Easy Purging Of Individual Barrels and Manifold.Reversible Manifold for Optimizing Barrel Capacity with Core %.Active Split ScreensTM for Viewing Multiple Screens At Once.Control Sequences for Utilizing in Mold Co-Injection Manifolds.Flexible Manifold Design for Machine or Mold Based Co-Injection.

Manifold for Machine Based
Manifold for Mold Based

Schematic of Incoe Co-Injection Hot


  • Foamed Core for reduced weight and noise transmission
  • Glass filled cores for improved physical properties
  • Low cost core for cost savings.
  • High gloss skin material over structural core material for combination of aesthetic and structural properties.
  • Post Consumer Recycled material in core. Environmental friendly.
  • Post Industrial recycled Material in core
  • Reground painted parts recycled into core.


The In-Mold Laminate/Low Pressure (IML) process combines standard machine technology with enhanced software and additional clamp control capabilities. The process has matured in the automotive market for molding laminates (carpets and vinyls) in products such as door panels.  In-Mold Laminate Molding eliminates post-molding assembly steps for lower manufacturing costs and increase productivity per square foot.

Features and benefits:

  • Provides closed-loop clamp positioning for accurate position of coining gap.
  • Provides full rated tonnage coining capability for coining large surface area parts.
  • Provide independent power sources for simultaneous injection and clamp movement during coining to allow maximum velocities for both functions.
  • Provides fast clamp response to ensure clamp coining speed to meet industry requirements.
  • Provides clamp multi-step coining functionality that maximizes operation/molding window.
  • Allows sequential (operator selectable) valve gate control as a function of screw position to enhance process control and minimize tonnage requirements, i.e. low pressure.

Looking for mold plastic mold service, please go to

Bulk Molding Compound

BMC (Bulk Molding Compound)/Thermoset Molding require the use of special material feed systems known as “stuffers”. The stuffer is used to prepare the material for presentation to the screw. The stuffer stores the material in a styrene saturated atmosphere, limiting the drying of the material.

Thermoset Machine FeaturesBMC dedicated control and softwareClose loop pressure controlStuffer interfaceScrew anti-repeat4 zones mold heats standard1 stage air ejectThermoset barrel and screwVenting/breathing sequenceBronze bushingsChrome rodsHeat/cool unitsSled control
    Click to enlarge

For prices and info contact: