Plastic Other Instruments Injection Molding


Mold Making & Plastic Injection One-stop Service

Yuyao Hualong Moulds & Plastic Products Co.,Ltd.

Yuyao Hualong Moulds & Plastic Products Co.,Ltd. was established in 1988. At present, there are 15 plastic injection molding machines from 100g to 3500 g, more than 20 mold manufacturing equipment such as machining centers, and more than 20 testing equipment and other auxiliary equipment. As leading Plastic Injection Molded Other Instruments manufacturers and Other Instruments factory in China, We have 100 employees and more than 30 managers and professional technicians.

After over 30 years of indomitable efforts, with the molds-making and plastic products-processing as the mainstay, our company has implemented a service for product development, mold-designing and making, plastic injection-molding and finished product-assembly in a coordinated process. Hualong mold has long history of serving European and American high-quality brands and well-known public companies at domestic and abroad. We custom make injection molded Plastic Other Instruments. Customized products involve all kinds of instruments, equipment accessories, industrial automation and intelligent equipment of the Internet of things, auto accessories, kitchen appliances, household products, etc. Products are widely used in power, communications, security, automotive, aerospace, medical, life and other different fields.

We have gained certifications of ISO9001, ISO16949 quality management system and ISO14001 environmental management system. OEM/ODM plastic injection molded Other Instruments. We accept annual factory inspection of clients, and conduct ECOVADIS audits on environment, labor and human rights, business ethics and sustainable procurement.

Customized Service Custom Advantage

Custom Process

  • Drawings or Samples

    We get the drawings or samples from customers.

  • Drawings Confirmation

    We will draw the 3D drawings according to the customers' 2D drawings or samples,and send the 3D drawings to customers for confirmation.

  • Quotation

    We will quote after getting the customers' confirmation,or quote directly according to customers' 3D drawings.

  • Making Molds/Patterns

    We will make molds or pattens after getting the mold orders from the customers.

  • Making Samples

    We will make real samples using the molds and send to customers for confirmation.

  • Mass Producing

    We will produce the products after getting the customers' confirmation and orders.

  • Inspection

    We will inspect the products by our inspectors or ask the customers to inspect together with us when finished.

  • Shipment

    We will ship the goods to the customers after getting the inspection result ok and the customers' confirmation.

Every certificate witnesses our profession


  • ISO45001
  • ISO14001 Environmental Management System Certification
  • IATF16949 Automotive Industry Quality Certification
  • ISO9001 Quality Management System Certification
  • Sustainability Rating
  • POM F20-02 ROHS SGS Report

Develop customized mold products according to customer requirements

Comprehensive analysis of projects, high degree of cooperation with customers, strong timeliness, good follow-up service and stable production.

Learn about customization
Industry Knowledge

How has the technology of injection molding for plastic instruments evolved over time

Injection molding is a popular manufacturing process that has been used for decades to produce a wide range of plastic products, including toys, automotive parts, and medical instruments. The technology of injection molding has evolved significantly over time, leading to improvements in efficiency, precision, and overall quality.

The history of injection molding dates back to the late 1800s when the first injection molding machine was developed. At that time, the machines were manually operated, and the process was slow and labor-intensive. The early machines were also limited in terms of the types of materials that could be used and the complexity of the parts that could be produced.

In the 1950s, the first hydraulic injection molding machine was developed, which improved the speed and accuracy of the process. The use of hydraulic pressure allowed for faster cycling times and greater control over the injection and cooling phases. This led to the production of more complex parts and higher volumes of production.

In the 1970s, the introduction of computer-controlled machines marked a significant milestone in the evolution of injection molding technology. These machines used computer programs to precisely control the injection, cooling, and ejection phases, resulting in higher precision and consistency in the production process. The use of computer-aided design (CAD) software also enabled designers to create more complex part geometries, leading to the development of new applications for injection molding.

The 1990s saw the introduction of electric injection molding machines, which provided several advantages over hydraulic machines. Electric machines were quieter, more energy-efficient, and had a smaller footprint, making them ideal for use in smaller manufacturing facilities. They also offered better control over the molding process, resulting in higher quality and consistency.

Today, injection molding technology continues to evolve, driven by advances in materials science, automation, and software. New materials, such as bioplastics and composites, are being developed that offer improved properties and sustainability. Automation and robotics are being integrated into the production process to increase efficiency and reduce labor costs. And advanced software tools are being used to optimize part design and process parameters, resulting in better performance and quality.

One area of particular interest in the development of injection molding technology is the use of micro-injection molding. This involves the production of extremely small parts with high precision, typically used in medical and electronics applications. Micro-injection molding requires specialized equipment and techniques, such as the use of ultra-precise molds and high-speed injection systems.

Another area of focus is the development of multi-material injection molding, which allows for the production of parts with different materials and properties in a single mold. This technology has applications in a wide range of industries, including automotive, aerospace, and consumer electronics.

What is the role of quality control in plastic instrument injection molding

Plastic injection molding is a widely used manufacturing process for creating plastic components and products. One critical aspect of the process is quality control, which plays an essential role in ensuring the final products meet the required standards.

Quality control in plastic injection molding refers to the measures taken to ensure that the products meet the specified requirements. It involves a series of activities that are designed to identify and eliminate defects in the manufacturing process. The primary goal of quality control is to produce consistent, high-quality products that meet customer requirements and expectations.

One of the critical components of quality control in plastic instrument injection molding is process control. Process control involves monitoring the manufacturing process and making adjustments to ensure that the products meet the required specifications. This includes controlling the temperature, pressure, and speed of the injection molding machine. By monitoring and controlling these variables, the manufacturer can produce products that are consistent in terms of quality and performance.

Another important aspect of quality control is product testing. Testing involves subjecting the finished products to various tests to determine their quality and performance. For example, products may be tested for durability, strength, and functionality to ensure that they meet the required standards. The testing process may involve destructive or non-destructive testing, depending on the type of product being produced.

In plastic instrument injection molding, dimensional accuracy is critical, and therefore, dimensional inspections are necessary. A dimensional inspection checks the accuracy of the product’s dimensions, such as thickness, height, and width. This inspection ensures that the products meet the required specifications and tolerances.

Visual inspection is also essential in plastic instrument injection molding. A visual inspection is performed to detect defects that cannot be detected through other inspection methods. Defects such as surface imperfections, color variations, and foreign particles can be detected through visual inspection. A visual inspection ensures that the products are aesthetically pleasing and meet customer expectations.

Another essential aspect of quality control in plastic instrument injection molding is traceability. Traceability involves tracking the materials and processes used in manufacturing the products. This enables manufacturers to identify and eliminate any defects that may occur in the production process. Traceability also helps in identifying the root cause of defects, making it easier to correct the problem and prevent it from occurring in the future.

What are some of the emerging trends in injection molding for plastic instruments

Injection molding is a manufacturing process used to produce a wide variety of plastic instruments, including medical devices, automotive parts, toys, and consumer goods. In recent years, the injection molding industry has seen significant advancements in technology, materials, and processes, leading to emerging trends that are transforming the way plastic instruments are made.

One of the most significant emerging trends in injection molding is the use of additive manufacturing. Additive manufacturing, also known as 3D printing, is a process of creating objects by adding material layer by layer. In injection molding, additive manufacturing is used to create molds with intricate geometries that would be difficult or impossible to achieve using traditional machining methods. This technology enables the production of complex plastic instruments with unique features and shapes, reducing the need for assembly and increasing the overall efficiency of the manufacturing process.

Another emerging trend in injection molding is the use of sustainable materials. Plastic waste has become a global concern, and manufacturers are exploring new ways to reduce their environmental impact. Sustainable materials, such as bioplastics and recycled plastics, are being used to produce plastic instruments. These materials are renewable, biodegradable, and have a lower carbon footprint than traditional plastics. As the demand for sustainable products continues to grow, the use of sustainable materials in injection molding is expected to increase.

Automation is another emerging trend in injection molding. Automation involves the use of robots and other machines to perform tasks that were previously done by human workers. In injection molding, automation can be used to perform tasks such as loading and unloading molds, inspecting parts, and quality control. Automation increases the speed and efficiency of the manufacturing process while reducing the risk of human error. It also enables manufacturers to produce plastic instruments in larger quantities, reducing costs and increasing profitability.

The use of advanced materials is also an emerging trend in injection molding. Advanced materials, such as thermoplastic composites and high-performance polymers, offer improved properties such as strength, stiffness, and temperature resistance. These materials are being used to produce plastic instruments that are lighter, stronger, and more durable than traditional plastics. Advanced materials also enable the production of plastic instruments with new functionalities, such as sensors and conductive properties.

  • Where are your products mainly exported to?
    Our products are mainly exported to the United States, Canada, the Netherlands, France, Italy, the United Kingdom, South Korea, and other dozens of countries.
  • How to deliver the goods to us?
    Foreign customers usually ship by sea. We are only 80 kilometers away from Ningbo Port, so it is very convenient to export by sea. Of course, if the customer's goods are urgent, we can also ship by air. Ningbo Airport and Shanghai International Airport are very close to us.
    Domestic customers, we have our own van and driver to arrange delivery.
  • How many employees of your comany? What about the technicists?
    The company has more than 100 employees, including more than 30 managers and professional and technical personnel.
  • How about the capacity of your company?
    The company covers an area of 9,000 square meters, with a modern workshop of more than 8,000 square meters. We currently have thirteen plastic injection molding machines ranging from 100 grams to 3500 grams, and more than ten mold manufacturing equipment such as machining centers, with an annual production capacity of 80 million yuan.
  • Do you have some standard parts?
    No, we are a pure custom manufacturer.
  • Can you do customized products?
    Yes, we mainly do customized products,we are mainly doing customized products according to the customers’ drawings or samples.
  • What applications do your products relate to?
    Our products cover almost every aspect of your life. Products have been involved in instrumentation, auto parts, medical equipment, smart equipment, audio-visual office supplies, fitness equipment, small kitchen appliances and many other industries.
  • What products can you offer?
    We mainly accept the customization of injection molds and the production of corresponding products.
  • Are you a direct manufacturer or a trading company?
    We are a professional manufacturer of customized injection molds and injection products. We also accept orders from domestic and foreign customers and have the right to export independently.
  • How to guarantee the quality of your goods?

    Firstly,we will do the inspection after every process.for the finished products,we will do 100% inspection according to the customers’ requirements and the international standard.

    Then, we have the more advanced and complete testing equipment in the industry: color detectors, three-coordinate measuring instruments, 3d scanners, etc. To ensure that the customer's all-round testing requirements for product color, high-precision geometric size testing, etc. are met.

    In addition, we have a professional team to do a complete technical analysis in advance. According to the needs of different materials, shapes and performances of the products, we will make corresponding molds or increase the necessary technological processes such as cooling and boiling to ensure that the product performance and shape meet the requirements of customers and reduce follow-up troubles.

  • What’s the payment term?
    When we quote for you,we will confirm with you the way of transaction,fob,cif,cnf,etc.
    For mass production goods, you need to pay 30% deposit before producing and70% balance against copy of documents. the more common way is by t/t. l/c is also acceptable.
  • How long can I get the feedbacks after we sent the inquiry? 
    We will reply you within 12 hours in working day.