Hot runner molds have two plates that receive the necessary heat from the manifold system. This system maintains consistency by keeping both the heating cylinder and the plastic at the same temperature.

Before hiring a company for plastic injection molding, you should have a deeper understanding of the differences between cold and hot runner molds. This will allow you to have an informed and more productive discussion before determining the best option for your requirements.

Since its establishment in 1983, Presisi Group has established itself as a leader in Indonesia's mold making and plastic injection molding industry. Our philosophy emphasizes continuous improvement aimed at stimulating dynamic, prudent, and sustainable growth through effective management of our human and industrial resources.

Our ISO9001-accredited on-site mold shop enables effective mold making as services are carried on site. Our experienced toolmakers guarantee high quality and fit for purpose tooling. We ensure your tool will always be ready for the each run by keeping a strict tool maintenance program in place.

Both cold runner and hot runner molds have their own production benefits that make each type of molding suitable for different applications. Let’s see what the biggest advantages of these two processes are:

Cold runner and hot runner molds are only one component of the plastic injection molding process you should be familiar with. First, you should find out more about the most important terms of plastic injection molding and learn what the most common types of plastic molding methods are. Only then is it time to explore all the different components you can manufacture with plastic injection molding and choose the best process for you.

You can also shorten your search and immediately outsource your plastic injection molding to Wunder Mold – a reliable manufacturer of high-quality plastic parts and components per your exact specifications. We choose the best resin, design a precise part and cost-effective manufacturing process, and bring you the items your business needs. Give us a call at (707) 448-2349, or send an email to sales@wundermold.com.

Presisi Group (PT Presisi Cileungsi Makmur and PT Presisi Cimanggis Makmur) is your trusted value-add partner for precision plastic injection molding. Based in Greater Jakarta, Indonesia, we have been at the forefront of Indonesia’s plastic injection molding and mold making industries for over 35 years.

Presisi Group offers end-to-end plastic injection molding services from design and development, mold making, to injection molding and a wide range of additional services such as welding, printing, and assembly.

This is underpinned by our 35+ years of expertise and a well-established reputation for high precision engineering, quality and reliability within the Indonesian plastics industry.

We provide design services for injection-molded products, supporting customers with CAD design, material selection,  through to guidance on tooling and costs. Our in-house 3D printing and development tooling solutions enable our customers to translate concept to full scale manufacturing.

Our two ISO9001-accredited manufacturing sites are home to over 80+ machines ranging in size from 30 to 1050 tonnes, and are ran by highly skilled technicians. We are able to process a wide range of thermoplastic materials, including high engineering grade plastics.

Although there are many different types of systems that utilize hot runner molds, the two main categories are internally heated and externally heated. The former are ideal for polymers sensitive to variations in temperature, while the latter provide enhanced flow control.

Cold runner molds generally consist of either two or three separate plates within the base of the mold. Molten thermoplastic gets injected via a nozzle and the sprue, and it fills an entire runner network leading to mold cavities. This system features unheated runners that distribute the plastic into individual molding cavities. This system then cools down the sprue, the runner, and the gate together with the part being molded.

As one of Indonesia's leading manufacturers of precision engineered molding tools and injection-molded plastic components, Presisi Group has long been a preferred supplier for a wide range of Indonesian and global businesses, from small start-ups to established multinationals.

We provide services beyond injection molding to meet our customers’ requirements. This include fitting of inserts, ultrasonic welding, printing, heat sealing, hot stamping, and light assembly. We also have a network of partners who we work with to complement our in-house capabilities.

As experts in our field we offer our wealth of knowledge and skills to our diverse customer base. We provide an end-to-end solution encompassing product design and development, mold tooling solutions and repeat production of injection molded products. Our customers span across multiple industries, ranging from automotive components and consumer electronics to medical technology and homewares.

Here, the heated runner has a separate plate housing which is stationary throughout the process. When the molding plate opens, the final product is without an attached runner.

The two predominant categories of plastic injection molding are cold runner systems and hot runner systems. Each type of plastic molding comes with its own distinct benefits, depending on the part or component you want to create through the process. That is why it’s important to know the difference between these two manufacturing methods before hiring a plastic injection molding company to design and produce your parts.

Presisi Group is fully accredited for the manufacture of molds, and for injection molding of thermoplastic molding materials under the scope of our ISO9001:2015 quality management system.