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// Yuyao City Yunpeng Plastic Mould Co., Ltd.

Who Are We

YUYAO YUNPENG PLASTIC MOLD CO.,LTD.
A famous China Hot Runner Mould Manufacturers and medical plastic mould suppliers, with extensive experiences in the production of molds for power tool components and home appliances. We are conveniently located in Yuyao city of Zhejiang province, positioned 1 hour from Ningbo port, 1 hour from Hangzhou airport, and 2.5 hours from both Shanghai Hongqiao and Pudong airports. As a leading custom medical plastic mould factory, the foundation of our company is our experienced designers, engineers and technicians. We offer multiple options for all types of injection molds based on their expected production cycles and the warranties they carry. Vigorous quality standards, competitive prices, timely deliveries, and responsive post-sales services form the cornerstone of our business philosophy, which we follow closely in all our operations to ensure strong and confident relationships with our domestic and international clients.
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  • 10000㎡

    Factory Area

  • 4000

    Daily Output

  • 600+

    Staff

  • 20+

    Creation Time

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  • Advantages of Hot Runner Mold

    Hot runner mould is a plastic injection molding system that eliminates the need for a cold runner. This reduces production and material costs while reducing cycle time. The runner that runs from the injection nozzle to the part is heated and liquefied during the process, which allows it to run straight through the mold cavity without any limitation. This runner is then ejected and separated from the finished product, recycled and reground into a pool of raw materials that can be used for future cycles. Another advantage of hot runner system is that it uses the same plastic raw materials that are being molded, which minimizes waste and ensures consistent quality and performance. This also decreases labor, and increases productivity. There are two types of hot runner systems: externally and internally heated. The former has annulus flow passages that are heated by a probe and torpedo located in the passages. This method is a good option for thick-walled parts where heat retention and control are critical. Both insulated and internal-heated runners offer significant benefits to molders. Insulated runners have extra-large runner channels that keep the molten flow path open during continuous cycling. This system is an inexpensive solution for molds that need to accommodate color changes and easy part removal. Both insulated and internal-heated runners use a temperature controller to maintain a constant temperature throughout the mold. This temperature controller can help to eliminate issues associated with cycle interruption, such as overheating and degradation of the mold or the plastic part. It can also track the onset of overheating during the process and automatically lower the temperature to eradicate it.

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  • Using a Medical Plastic Mould to Create Close-Fitting Components

    Medical plastic mould can be used for a variety of applications. From face shields to PPE and specialist signage, it’s an ideal manufacturing process for creating close-fitting components in large quantities. Unlike other molding processes, medical injection molding is able to produce complex geometries and intricate designs in a single molding cycle. This allows for product variations that would otherwise be impossible with other types of molding. The most common type of plastic that is molded into medical devices is silicone. This material has a high molecular weight and provides biocompatibility as well as durability. Other common materials include polypropylene and polycarbonate. These materials are also heat and chemical resistant. These materials are suitable for use in medical devices that undergo sterilization and have to withstand harsh environments and human body movements. They are also durable and resist breakage when subjected to sharp force, vibration, and other environmental conditions. Choosing the right injection molding materials is essential to the success of any medical device design or component. The resulting products must be safe to use and comply with FDA requirements and European laws. They must be resistant to corrosives, liquids, and temperatures as well as be capable of withstanding repeated sterilization in autoclaves.

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  • Advantages of Auto Plastic Moulding

    Typical automotive plastic injection moulds include dashboards, headlights, door panels, instrument clusters and more. Manufacturers use injection molding for a number of different reasons, from the flexibility of the process to the wide variety of plastic materials available.Injection molding is a reliable manufacturing method for generating solid plastic parts. The process consists of injecting molten plastic material into a mold cavity, cooling it, and extracting the finished part. Auto plastic moulding is a very important component in the automotive industry and offers many advantages over metal stamping. These include a high level of quality, cost-effective production, and compatibility with a variety of different polymers.Plastic components are often lighter than their metal counterparts, which makes them ideal for improving fuel efficiency without sacrificing power. This helps meet the demands of consumers for eco-friendly vehicles and government regulations requiring higher fuel-efficiency levels. In addition to being lightweight, plastic components can also be easily modified for specific color schemes. For example, manufacturers can mix dyes with the raw materials and then inject them into a molded plastic piece to create solid, consistent colors that match the vehicle’s color scheme.Injection molding is a complex and demanding manufacturing process that requires a well-designed mold. In order to ensure that a molded plastic product is of optimal quality, a quality control team carries out rigorous inspections from raw material through the finished part. This includes dimensional and structural checks. Depending on the complexity of a molded component, the quality control team may need to run checks at different times during production.

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  • The Intricate Plastic Injection Mould Process

    The plastic injection mould process is a rapid and reliable method of forming complex and durable plastic parts. It can produce a large number of voluminous components in a single cycle, and it produces very little waste material.Despite its speed and ability to produce numerous plastic parts, a high-quality plastic injection mould is still an intricate tool. It requires extensive planning and testing to ensure its long-term performance. Designing, prototyping, and tooling are the main stages in creating a good plastic injection mold. The lead time for these phases can be months.Injection molding is an excellent technique for producing intricate and detailed parts, including features that are impossible to achieve by other methods. It also has a long lead time, and it is important to use a moulder who understands the specific needs of your application. When a molten plastic is introduced into the front mold half of a plastic injection mold, it fills the cavities in the mold plates. It can be injected with a shot that is dependent on the volume of the part, and it must be kept at the right temperature during its journey into the cavity.Once it has fully cooled, the molded part is removed from the mold plate and it is recovered. It is then sent to the trimming unit, where excess plastic from the molten plastic is removed from each part. Injection molding relies on heating and cooling a molten plastic to a controlled temperature, so it is important that the walls of the mold are uniform in size to ensure proper solidification. This prevents the formation of defects.

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  • A plastic injection mould is a specialised tool

    Injection moulding is a technique used to fabricate plastic parts. It is a highly efficient and productive process that produces high quality and repeatable components.A plastic injection mould is a specialised tool that is used to mould a range of different types of products. The mold is used to form the final shape of a product by injecting molten plastic into the core & cavity design of the tool, then cooling it. The material that is used in the mould is determined by the type of product to be made, the desired strength and the required aesthetic qualities. Materials such as nylon, polyethylene, elastomers and polystyrene can all be used in the moulding process.Some of the important properties that can be considered when choosing the plastic that will be used in the mould include elasticity, heat deflection, water absorption and impact resistance. These features are particularly important when using a plastic to make parts that will be subjected to harsh or hot conditions. Injection molded parts are available in a wide variety of materials, each with unique properties. For example, acrylonitrile butadiene styrene (ABS) is an opaque, engineering-grade plastic that is popular for its toughness and resistance to chemicals and weather.Other materials that are often used for injection molded parts include HIPS, which is known for its high impact strength and stiffness, and GPPS, which has low melting points and is widely used for medical, optical and electrical and electronic applications.

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  • Plastic Injection Molding is a manufacturing process

    Plastic Injection Molding is a mass manufacturing process used for the production of plastic parts. It is a highly productive process and has many advantages over other forms of molding such as CNC machining.It is used to manufacture large, voluminous plastic products in a short time frame. It is also capable of producing parts with dimensional consistency that ensures that they are similar in shape and size. The process involves the injection of molten plastic into the cavities of a custom designed mould tool. The injected plastic is allowed to settle and solidify over the mold tooling at relatively low pressures and temperatures.There are a variety of plastics that can be used for this application, but most plastics are thermoplastics. These materials can be remelted repeatedly to produce new parts. Injection is carried out by a machine which uses a reciprocating screw and a barrel to convey and pressurize the plastic pellets. The barrel is wrapped in several heater bands to provide thermal energy for the plastic granules.When the right dosage of melted plastic is conveyed to the front of the screw, it is injected into the mold. The injection system is controlled by a non-return valve to prevent the backflow of molten plastic. The injection pressure is applied to force the molten plastic into the cavity until it is 95% filled. The injection speed depends on the flow characteristics of the molten plastic and is determined by the part volume required for the molding cycle.

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Industry Knowledge Extension

A hot runner mold is a type of injection molding system that is used to manufacture plastic parts. It is designed to keep the material in the runner system (the channels that deliver molten plastic to the mold cavities) at a controlled, elevated temperature, thus eliminating the need for a cold runner system where the material would solidify and be ejected as waste.
Here's how a hot runner mold works:
Injection: The molten plastic material is injected into the hot runner mold through the nozzle of an injection molding machine.
Runner System: Instead of a traditional cold runner system, the hot runner mold has a heated manifold and a network of heated channels, also known as runners. These runners distribute the molten plastic to multiple mold cavities.
Temperature Control: The hot runner system has heaters and temperature sensors to precisely control and maintain the temperature of the molten plastic in the runners. This ensures that the material remains in a molten state, ready to fill the mold cavities.
Mold Cavities: The hot runner mold contains multiple mold cavities, which are the voids where the plastic part is formed. These cavities are precisely designed to produce the desired shape and features of the final part.
Cooling: While the runner system is kept at an elevated temperature, the mold cavities are cooled to solidify the plastic and allow it to take the desired shape. Cooling channels or inserts help dissipate heat from the cavities, and coolant is circulated to maintain the desired temperature.
Part Ejection: Once the plastic in the mold cavities has solidified and cooled sufficiently, the mold opens, and the part is ejected using ejector pins or other mechanisms.
Repeat Cycle: The process is repeated for the next injection cycle, with the molten plastic flowing through the hot runner system, filling the mold cavities, cooling, and ejecting the parts.
Hot runner molds offer several advantages over cold runner molds, including reduced material waste, shorter cycle times, improved part quality, and increased design flexibility. However, they are typically more complex and expensive to implement and require specialized maintenance and troubleshooting procedures.

Using a hot runner mold provides several advantages over a cold runner mold in plastic injection molding. Here are some of the key benefits:
Reduced Material Waste: In a hot runner mold, the runner system is kept at an elevated temperature, preventing the plastic from solidifying. This eliminates the need for a cold runner, which would otherwise need to be removed and discarded as waste. As a result, hot runner molds significantly reduce material waste, leading to cost savings and more environmentally friendly production.
Shorter Cycle Times: Hot runner molds can achieve faster cycle times compared to cold runner molds. Since the plastic remains in a molten state within the heated runners, it can flow more easily and quickly into the mold cavities. This reduces the cooling time required for the part to solidify and allows for faster production cycles, increasing overall productivity.
Improved Part Quality: The controlled temperature in the hot runner system helps maintain consistent material flow and fill in the mold cavities. This results in improved part quality with fewer defects such as sink marks, warping, or short shots. Hot runner molds offer better control over gate placement and filling patterns, allowing for more precise and uniform part dimensions.
Increased Design Flexibility: Hot runner molds provide greater design flexibility compared to cold runner molds. With a hot runner system, it is possible to have multiple gates and fill points, enabling more complex part geometries and better distribution of material flow. This allows for the production of parts with intricate designs, thin walls, or multiple components without sacrificing quality or performance.
Cost Savings: Although the initial investment for a hot runner mold is higher than that of a cold runner mold, the long-term cost savings can be significant. Reduced material waste, shorter cycle times, and improved part quality lead to higher production efficiency, lower scrap rates, and decreased overall manufacturing costs. Additionally, the elimination of post-molding operations like runner trimming further contributes to cost savings.
It's important to note that the selection between hot runner and cold runner molds depends on various factors such as the specific project requirements, production volume, material characteristics, and cost considerations.

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