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Transfer Rubber Mold
Transfer molding is a process for producing rubber parts that uses pressure and heat to direct the material into the mold through a reservoir behind the mold, and molding is performed.
The rubber transfer mold is one of the most important molds used in the rubber products manufacturing industry. These molds are widely used in various industries due to their high efficiency, durability, and high quality of the final product.
Benefits and uses of using transfer molds
Transfer molds are usually used to produce rubber-metal parts. In the transfer method, the material is more compact than in the compression method, and these molds also have a better cutting line than compression molds. Another advantage of using transfer molds to produce rubber parts is that the mold does not trap air.
The use of transfer rubber molds is very common in various industries such as automotive, electronics, medical, and packaging industries.
Using these molds can help improve product quality, reduce production costs, and increase productivity in various industries.
Finally, given the importance and widespread use of the transfer rubber mold, it is essential for manufacturers and professionals in the rubber injection industry to be familiar with this mold and its related technologies. By utilizing the capabilities of these molds, it is possible to produce high-quality products while also reducing production costs.
What is a Transfer Rubber Mold?
Transfer rubber molding is a method of shaping rubbers and elastomers in which the raw material (rubber compound) is first placed in a special chamber and then injected under pressure into the mold cavity through channels (runners).
In fact, this method is a combination of compression molding and injection molding, which tries to incorporate the advantages of both.
In transfer molding, the rubber material is partially preheated before entering the cavity and then uniformly injected into the mold. This process results in high dimensional accuracy, excellent surface quality, and the absence of bubbles or surface defects.
Transfer Rubber Mold; Precision, Quality and Durability in the Production of Rubber Parts
In the world of industrial rubber parts production, the choice of molding method plays a decisive role in the final quality of the product. One of the most widely used and precise methods in this field is transfer molding, in which a combination of technology, high precision and quality control provides a product with an excellent surface finish and high durability.
In this article, we intend to fully familiarize ourselves with the concept of transfer rubber molding, its manufacturing steps, benefits, applications, and its differences from other molding methods.
Transfer Molding Manufacturing Steps and Process
To better understand the function of this mold, let’s examine the steps in producing a rubber part using the transfer method:
- Preparation of rubber materials (compounds)
Rubber materials are first controlled in their composition, mixing, and curability to achieve desired mechanical properties. - Placing materials in the transfer chamber (Pot)
The materials are placed in a bulk container above the mold. - Applying pressure with a piston or plunger
The high-pressure piston drives the semi-heated material through the channels into the cavities. - Baking and forming the piece
At high temperature and a certain time, the curing reaction (vulcanization) takes place and the rubber piece takes its final shape. - Cooling and demolding
After the process is complete, the mold cools and the final piece is removed from the mold with minimal burrs.
Advantages of Using Transfer Rubber Molds
Transfer molding has significant advantages over other methods, making it an ideal option for producing precision and industrial parts::
- Parts produced with transfer molding have precise tolerances and high uniformity.
Excellent surface quality
- The uniform flow of material ensures that the surface of the part is smooth, shiny, and flawless.
Less pilling
- Due to the special design of the mold, the amount of pleats is very small and the need for final finishing is reduced.
- Ability to produce multi-piece parts or with metal inserts
This method allows for the production of parts that include metal parts or interior trim.
- Suitable for high-precision mass production
In high print runs, production quality is maintained and repeatability is excellent.
Applications of Transfer Rubber Molds in Various Industries
Transfer molds are used in a variety of industries, especially where high precision and surface quality are required. Some of the most important applications include :
- Automotive industry
Production of parts such as shock absorbers, packings, seals, and seals specific to the engine and brake system.
- Electrical and electronics industries
Production of rubber insulators, bushings and joint covers.
- Oil, gas and petrochemical industries
Manufacturing heat-resistant gaskets, precision O-rings, and pressurized sealing parts.
- Medical industries
Production of precision silicone parts, such as valves and sealing accessories for medical equipment.
- Household appliances and general industrial equipment
Manufacturing of anti-vibration parts, rubber mounts and elastomeric joints.
Difference Between Transfer, Compression, and Injection Molds
| Features | Compression Mold | Transfer Mold | Injection Mold |
|---|---|---|---|
| Production Speed | Medium | High | Very High |
| Dimensional Accuracy | Average | High | Very High |
| Mold Cost | Low | Medium | High |
| Suitable For | Simple parts | Precision and multi-part components | Mass production |
| Pleat amount |
High | Low | Very Low |
As can be seen, transfer molding is actually an intermediate and optimal option between the other two methods, striking a balance between cost, quality, and production speed.
Important points in designing transfer rubber molds
To achieve the best results, mold design must be done with high precision and based on the type of part and the properties of the compound. Some key points in design include the following:
- Correct selection of injection location and material flow path
- Precisely designed channels and holes for uniform distribution
- Using heat and pressure resistant materials for the mold body
- Considering a ventilation system to remove trapped gases
- Suitable design for easy opening and closing of the mold and part removal
Why is choosing a transfer molding important?
In today’s industries where quality and production accuracy are paramount, the use of transfer molds results in:
- Reduce material waste
- Reduce production time
- Increase the useful life of the mold
- The quality of the final product is maintained sustainably.
These features allow factories that use transfer molding to both save on production costs and have a higher position in the competitive market.
Choosing the Best Transfer Mold Manufacturer in Iran
If you are planning to order or manufacture a transfer rubber mold, it is very important to choose a company with experience in mold design and machining.
A company like Parto Gostar Sepahan, with years of experience in designing and manufacturing various types of rubber molds, has the ability to provide specialized services in the fields of 3D design, precision manufacturing, performance testing, and final mold modification.
Technical support, provision of CAD drawings, and use of high-quality raw materials in the manufacture of molds are among the factors that have made this complex one of the most reliable options in the country’s mold making industry.
Conclusion
Transfer rubber molding is one of the most advanced methods of producing rubber parts, which combines precision, speed, and quality to meet the needs of many modern industries.
If you are looking to produce parts where surface quality, precise dimensions, and high repeatability are important, transfer molding is the best option for you.
Using this technology not only reduces production costs, but also increases the durability and beauty of rubber products.