As the core equipment for the production of plastic products, the decision to buy injection molding machine directly affects the production efficiency, product quality and long-term competitiveness of the enterprise. An inappropriate injection molding machine may lead to millions of hidden losses, including energy waste, mold loss, increased defective product rate, and limited production capacity. This article will systematically analyze the key points that must be paid attention to when purchasing an injection molding machine from ten dimensions, and provide feasible solutions to help enterprises avoid risks and achieve the best purchasing decision.

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Quality issues

When buy injection molding machine, the first thing to consider is the quality issue. A good injection molding machine should have efficient production capacity, stable performance, precise production quality, and be able to produce products that meet the needs with quality and quantity.

In order to ensure the quality of the plastic injection machine, the following aspects can be considered:

1. The reputation and credibility of the injection molding machine manufacturer.

2. Quality control and inspection standards of the injection molding machine production process.

3. The quality level of key components and parts used in the injection molding machine.

After-sales service issues

When buying small injection molding machine, you need to pay attention not only to the product itself, but also to consider the quality of after-sales service. High-quality after-sales service can provide guarantee for future maintenance and can effectively reduce the cost of using injection molding machines.

When understanding after-sales service, you can pay attention to the following issues:

1. The after-sales service system and service specifications of the small plastic molding machine manufacturer.

2. The warranty period and after-sales service commitment provided by the injection molding machine.

3. The service attitude and service response speed of the injection molding machine manufacturer, etc.

Scope of application

When buy injection molding machine, you need to consider the scope of application of the injection molding machine to ensure that the injection molding machine can meet production needs.

The scope of application of the automatic plastic molding machine includes: injection pressure, injection volume, template size, opening and closing mold force, injection speed and stability, etc. For different production needs, you need to choose different scope of application injection molding machines.

Configuration issues

The configuration of the pvc injection molding machine is also a key issue that needs to be considered when purchasing. Different configurations determine the accuracy, quality, energy efficiency and safety of the injection molding machine.

Common configurations include: inverter, temperature controller, injection device, pressure feedback device, mold temperature controller, etc.

By choosing the appropriate configuration, the production efficiency and service life of the automatic injection molding machine can be improved, while reducing the cost of use.

Deep matching of mold compatibility

1. Key matching parameters

① Template size: ensure that it is more than 10cm larger than the length and width of the mold

② Ejection system: Mechanical ejection requires a stroke of ≥50mm

③ Nozzle interface: R type, D type and other standard matching

④ Mold thickness: within the mold capacity of the machine

2. Special needs considerations

① Hot runner system power interface

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② Core pulling device hydraulic interface

③ Quick mold change system compatibility

Personnel training system construction

1. Three-level training plan

① Operator training

Safety operating procedures, daily inspection process

② Technician training

Parameter debugging method, simple fault handling

③ Management personnel training

Production data analysis, preventive maintenance plan

Deep inspection of core components

1. Injection system core detection

① Screw barrel group:

Material verification: DIN standard material certificate is required (such as 38CrMoAlA)

Wear detection: Measured with an internal diameter micrometer, diameter jump ≤0.05mm/m

Surface treatment: Nitriding layer thickness ≥ 0.3mm (detected by microhardness tester)

② Nozzle assembly:

Thermocouple accuracy test (qualified within ±1℃)

Flow channel roughness test (Ra≤0.8μm)

Professional evaluation of accessory status (details affecting production stability)

1. Inventory strategy for vulnerable parts

• Must-have spare parts:
• Seal set (including all specifications)
• Heating coil (at least 2 sets)
• Fuses

2. Recommended spare parts:

• Screw (when the purchase cycle is ≥ 3 months)
• Servo motor encoder
• Electrical component quality identification
• PLC brand requirements: Siemens/Mitsubishi/Omron
• Cable identification: oil-resistant and flame-retardant (UL certified)
• Contactor life: ≥1 million times (check model parameters)

Appearance and structure inspection ‌ 

Check whether the machine has obvious damage, such as broken or loose pull rods, bent or cracked bases, etc. ‌

injection molding machine price issue

In addition to the above points, injection molding machine price is also one of the issues that need to be considered when purchasing an injection machine. Different brands, models, configurations and qualities will affect the price of automatic plastic molding machines.

In short, when purchasing, you need to consider the above points comprehensively, determine your actual needs and budget, and choose products with higher cost performance. When buying a new injection molding machine, you need to pay attention to several key issues such as quality, after-sales service, scope of application, configuration and injection molding machine price. Through comprehensive consideration, choosing an injection molding machine that suits you can improve work efficiency, reduce use costs, and meet production needs.

FAQ’s

Top 10 Plastic Injection Molding Questions

Plastic injection molding is the most popular process for manufacturing plastic parts. This process involves molten material which is injected into a mold to create a product. Our in-house molders provide both the design and manufacturing of these products. 

For more information, please visit automotive injection molding.

1. What determines the cost of plastic molding?
   The cost of injection molding is determined by a number of factors such as; the number of cavities, the mold itself, complexity of parts, etc. The actual mold itself is usually the most expensive upfront cost. Additionally, the fewer number of cavities will lower your upfront cost and vice versa. We’re dedicated to providing customers with quality service at a lower cost
2. What sized businesses do you serve?
   When researching molding manufacturing companies it’s important to keep in mind your volume requirements and make sure they match that of the company you work with. The Toolroom is equipped to handle volume from small to large businesses. No matter the size of your project, we can help
3. What certifications should I look for when choosing a molder?
   Certifications are a great way to determine which molder is right for you. They show which businesses are at the top of the industry. At the Toolroom we are dedicated to providing the best services to our customers and this includes having the proper qualifications. When choosing a manufacturer, it’s important to research their current certifications to ensure you are getting quality manufacturing.
4. Should I buy my parts in the US or overseas?
   While working with a manufacturer overseas or even moving your business overseas will help save on up-front costs, working with a local manufacturer has numerous benefits. Choosing a local manufacturer is a great way to ensure open lines of communication during the course of your project. Choosing a manufacturer in the United States and more importantly, a local manufacturer has great long term effects in terms of cost and project turn-around time.
5. How long does it take to build a mold?
   Creating a plastic injection mold can take anywhere from 5-12 weeks. The complexity of each project will determine the turn-around time.
6. Can I get a mold warranty?
   Many mold manufacturers offer limited Lifetime Warranty for their molds. This ensures that if your project should need fixing, it can be done at no charge.
7. What type of material or resin is needed?
   Picking the right materials for your project, can a stressful task as there are hundreds of different products to choose from. Below are the 5 most common resins that can be used for injection molding:
   • ABS
   • Celcon
   • Polypropylene
   • HIPS
   • LDPE
8. What types of custom-built plastic injection molds are out there?
   There are several different plastic injection moldings available in the marketplace to fit your needs. The Toolroom has several custom-built moldings to choose from:
   • Unscrewing Molds
   • Two Shot Molds
   • Prototype Molds
   • Multi-Cavity Molds
   • Insert Molds
   • Stack Molds
9. What does the molding process look like?
   Here at The Toolroom we have a creative system in place to help guide you through every step of the injection molding process.
   • Send us the 3D CAD model along with all the mold requirements for your product
   • We will provide you with a quote
   • You will receive one-two reviews of your project design
   • Once we have your approval, the manufacturing process will start
   • After the molding process is complete, we will test run your product
10. What do I do if I already have an injection mold?
    If you already have an injection mold made, you will need to find a company that is also able to produce plastic parts. Luckily, The Toolroom is equipped with experts to help you develop any plastic product you made need.