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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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  • Plastic Injection Mold is a multipurpose device

    A plastic injection mould is a device used to create various shapes in plastic. These products are used in a wide range of industries such as medical syringes, cookware handles, electronics, toys and more.The process involves a number of steps. One of the first is the injection of liquid into the cavity. This is followed by material cooling. Finally, the part is ejected. Ejection is usually done with the use of an ejector or pin. It is important to note that there are many different kinds of plastics and fillers available to choose from. Some of the most common are high density polyethylene (HDPE), nylon, and PET. You can also find bio-compostable plastics and antistatic plastics.However, you'll need a good moulding tool for a successful moulding process. A properly designed moulding tool includes a good ejection system, a filing system, and a cooling circuit. A well-designed mould will not only save money and reduce production time, but it will also integrate the different parts of an assembly into a single shot. In addition, it will help you to avoid the pitfalls of using manual processes.Plastic injection moulding is a manufacturing process that can produce complex parts in a very short period of time. But the equipment and tools required to perform the process are both expensive.

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  • How to Design an Auto Plastic Mould

    The automotive industry traditionally relyed on metal, but the trend towards lighter vehicles is boosting the growth of the plastics industry. Today, manufacturers use a wide variety of plastics for different applications.Plastic injection molding is a reliable process for making solid plastic parts. It allows automotive manufacturers to quickly produce a range of auto parts. These include interior, exterior and instrumentation components. Automotive manufacturers utilize the process to produce parts such as bumpers, fenders, door handles, dashboards, air vents, and glove compartments. Injection molding is suitable for flexible, rigid, and rubber materials. As a result, it produces strong, lightweight, and high-quality plastic car parts.When designing a mold, it's important to ensure accuracy. Manufacturers can create three-dimensional drawings using software. This will help keep to the specifications of the client.Molds for car parts must meet a number of standards. Reliable companies adhere to ISO 9001, Health and Safety compliance, and other relevant industry quality guidelines.Before designing a mold, it's critical to know the size and shape of the product. Manufacturers have many finish options, including gloss, color, and texture. Choosing the right material for the part's surface is essential to achieving a good aesthetic appearance. When choosing a plastic material, it's important to understand the characteristics of the material. For example, foamed polypropylene offers low weight and durability. Hard plastics such as ABS and polycarbonate are also used.During the injection moulding process, manufacturers can use a variety of finishes. A high-quality plastic injection mold can mold a wide variety of plastics and thermoplastics.

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  • Plastic Injection Mold comes in many shapes and features

    The injection moulding process is an important part of manufacturing plastic products. During this operation, plastic is injected under high pressure into a mold cavity. After the plastic material is injected, it cools and hardens inside the mould. Afterwards, it is ejected from the mould.A good plastic injection mould design includes complex geometries and features such as undercuts. It is important to incorporate an effective cooling system to ensure the proper cooling of the molten plastic. A well-constructed plastic injection mould can help to reduce production costs, while providing quality parts. Some important parameters to consider when choosing an injection mould include the material, cost of resin, and the amount of plastic needed.Another aspect to consider is the size of the injection mould. Injection moulds can be designed to create single or multiple cavities. This can vary by product. For example, a two-shot mould is used to combine different materials for additional colour. Molds can also be made from aluminum or steel. Aluminium moulds have lower mechanical and dimensional tolerances than steel ones. However, they are not ideal for use in high volume production or applications with tight dimensional tolerances.Typically, injection molds are constructed in two halves. The front, or fixed part of the mould, is a platen that is closed during the injection process. The movable part is then closed and the halves are separated.Once the halves are separated, the molten plastic is injected into the cavity of the mould. The pressure from the injection system helps the plastic to compact into the mould.

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  • Plastic Moulds for the Home Appliance Industry

    Plastic moulds are used in a variety of industries, including automotive, home appliances, and toys. In addition to being durable and easy to work with, they are also inexpensive.The main plastic moulding processes are injection molding, blow moulding, compression moulding, and rotomoulding. These techniques allow for rapid production of large volumes of plastic parts.Plastic injection moulding is the most common technique for producing appliance parts. This method uses high-pressure injections, allowing the plastic to reach deep into the mold. After the plastic has been injected into the mould, it is cooled to retain its shape. The use of injection moulding allows for customization of the design of the plastic parts. Its low cost and ease of remolding means that it is highly popular in the home appliance industry. A number of household appliances, from dishwashers to blender containers, use this technique.Another important benefit of using injection molding is that it helps to minimize the need for additional processing after the mould has been molded. As a result, the cost of manufacturing a large number of appliances is reduced. Home appliances made from plastic components are also more corrosion-resistant and can last 70 percent longer than a comparable metal part. They are also cheaper, which results in quicker product completion.Plastic moulding is a vital component of our daily lives. Whether we use it for making toys for our children, or for making health care supplies, plastic is a critical element of our lives.

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  • The Process of Plastic Injection Moulding

    Plastic injection moulding is a manufacturing process that creates complex parts from plastic. It is used in mass production, including the automobile industry and the electronics industry.There are several steps in the process of injection molding. First, a sprue is formed. This is a passageway for the molten plastic to enter the mould cavity. The sprue is then connected to a runner system. Each runner has a gate on the end. A plunger or screw is used to apply pressure on the sprue. As molten plastic flows through the sprue, the pressure is reduced. Once the sprue and runner have passed the gate, the molten plastic is then injected into the mould cavity.During the cooling stage, a coolant is used to reduce the heat of the molten plastic. In addition, an air vent is built to eliminate trapped gases. These features help eliminate the occurrence of distortion and poor surface finish. After the part has cooled, ejectors are used to remove the finished product. Proper mould maintenance is crucial to the life of the mould. Ejection difficulties can cause interruptions to the production cycle.When the plastic material has reached a solid state, excess materials will adhere to the part. Trimming will then be used to separate the molded units.The sprue picker is a robotic device that allows the mold to be pre-staged before it is pressed into use. Besides reducing the amount of action time in and out of the mold, the sprue picker is also capable of placing the sprues in a granulator for recycling.

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  • How to Choose an Industrial Plastic Mould

    A mold is the key to manufacturing plastic parts. It is a device that produces multiple copies of a part in a single "shot". Its design can affect the strength and durability of the final product.Moulds are made of steel, aluminum, and other materials. They are used in both hot and cold moulding processes. The type of mould used for a particular part depends on the product's use.The most common metal for a mold is steel. Some molds are made from aluminum, which can be a cost-effective option for short production runs. Moulds are a major investment in a project. When choosing a mould, it's important to choose a quality manufacturer to ensure that your project meets industry standards.Injection molding is a common method for producing high volume plastic parts. It offers low labor costs and minimal post-mold finishing operations. The process requires careful design and precise production to ensure the integrity of the final product. It is important to select the right resin for your project. The material will also have a significant impact on the design of your injection mold. For example, the toughness of the material can determine the final product's strength. It can also be strong and rigid or flexible.The type of machinery used is another factor to consider. Engineers consider cycle time and material properties to optimize designs. Using a domestic manufacturer can reduce delivery costs.Other factors to consider include the number of cavities in the mold. Some molds can have up to 128 cavities.

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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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