Electrical appliance injection molds

Core Product: Custom Electrical Appliance Injection Molds

We specialize in the customized design and manufacturing of high-precision injection molds for electrical appliances, which are core production equipment for key components of household appliances (refrigerators, washing machines, air conditioners), small kitchen appliances (soybean milk makers, rice cookers), and commercial electrical equipment. Our core function is to provide durable, high-precision injection molds that realize integral forming of electrical appliance parts (e.g., shell, panel, internal structural components), ensuring consistent dimensional accuracy, excellent surface finish, and reliable structural strength of the molded products—critical for electrical appliances to achieve waterproof, dustproof, and long-term stable operation. Backed by a professional technical team of 35+ engineers and technicians, we leverage advanced CAD/CAM/CAE software (UG, AutoCAD, SolidWorks) to conduct in-depth simulation of the injection molding process, optimizing mold gate design, cooling system layout, and cavity structure to avoid defects such as shrinkage, warpage, and熔接痕 (weld lines) in electrical appliance parts. Our molds are tailored to match the material characteristics of electrical components (e.g., flame-retardant ABS, high-temperature resistant PC, food-grade PP) and mass production needs, featuring short molding cycles, high yield rates, and long service lives.

Production Process & Supporting Technologies

The production of our electrical appliance injection molds follows a strict standardized workflow to ensure quality and efficiency: 1. Demand Analysis & Design (confirm client’s electrical part specifications, material requirements, and production capacity; conduct 3D mold modeling and injection process simulation); 2. Raw Material Preparation (select high-quality mold steel (S136, H13, P20) suitable for electrical mold manufacturing; implement precision cutting via CNC flame cutting equipment); 3. Precision Machining (carry out CNC milling, grinding, EDM, wire cutting, and high-speed machining to ensure the machining accuracy of mold cores and cavities); 4. Assembly & Debugging (skilled technicians perform manual assembly, install hot runner systems (if needed), and conduct multiple rounds of debugging and trial injection to optimize molding parameters); 5. Quality Inspection & Delivery (use coordinate measuring machines (CMM) and other precision testing equipment to inspect mold dimensions; conduct trial injection tests to verify product appearance and performance). In addition to specialized injection molds for electrical appliances, we also provide supporting processes such as plastic injection molding, surface treatment (painting, electroplating, silk-screen printing, laser engraving), and finished electrical component assembly, achieving full-chain service for clients.

Common Problems & Solutions in Electrical Appliance Injection Mold Production

• Problem 1: Warpage and deformation of electrical appliance shells - Solution: Optimize the mold cooling system layout via CAE simulation to ensure uniform cooling of the shell; adjust injection parameters (injection speed, pressure, holding time) to reduce internal stress of the plastic part; select mold steel with stable thermal conductivity and conduct proper heat treatment to ensure mold dimensional stability; add reinforcing ribs in the mold design to enhance the structural rigidity of the product.

• Problem 2: Weld lines on the surface of electrical parts - Solution: Improve the mold gate and runner design to ensure the plastic melt flows smoothly and merges uniformly; increase injection temperature and speed appropriately to enhance melt fluidity; optimize the mold exhaust system to discharge trapped air; select plastic materials with good compatibility and fluidity.

• Problem 3: Poor flame retardancy of molded parts (for electrical shells) - Solution: Collaborate with clients to confirm the flame retardant grade requirements of electrical parts; select mold steel that does not affect the flame retardant performance of the plastic; optimize the injection molding process to avoid thermal decomposition of flame retardant additives; conduct strict flame retardant testing on trial injection products.

Frequently Asked Questions (FAQ)

• Q1: What types of electrical appliance parts can your injection molds produce? - A1: Our molds can produce various electrical appliance parts, including refrigerator door liners, washing machine control panels, air conditioner shell components, rice cooker inner pots, and commercial electrical equipment structural parts. We support customization based on client-specific drawings and performance requirements (e.g., flame retardancy, waterproofing, food grade).

• Q2: What is the lead time for custom electrical appliance injection molds? - A2: The lead time varies by mold complexity: sample molds take 7-15 working days, mass production molds take 20-45 working days, and urgent orders can be completed in 5-10 working days with an additional fee. We will provide a detailed production schedule and delivery time after confirming the order.

• Q3: Do you provide quality assurance for your electrical appliance injection molds? - A3: Yes, we provide a 12-month quality guarantee for all injection molds. During the guarantee period, if there are quality problems caused by mold design or manufacturing (e.g., dimensional deviation, mold damage), we will provide free repair or replacement services. We also offer lifelong technical support for mold maintenance and parameter optimization.

• Q4: Can you provide injection molding services for finished electrical parts? - A4: Yes, we have a professional injection molding production line with 20+ high-precision injection molding machines (50-500 tons). We can provide one-stop services from mold design, fabrication to finished product injection molding and assembly, which can effectively reduce your communication costs and shorten the production cycle.

• Q5: What certifications do your molds and finished products have? - A5: Our factory is certified by ISO9001:2015 and IATF16949 (automotive industry quality management system). The plastic materials we use for electrical parts comply with RoHS, REACH, and food grade (FDA) certifications (if applicable). We can provide relevant certification documents and test reports according to client requirements.

Product Classification & Technical Specifications

1. Product Classification by Industry, Material & Part Type

2. Technical Specification Parameters

Our Core Competitiveness

• 10+ Years of Industry Expertise: Founded in 2012, we have focused on electrical appliance injection mold manufacturing, serving more than 200 clients from over 40 countries, including Europe, North America, and Southeast Asia. Our rich experience in the electrical industry enables us to accurately grasp client needs and solve industry-specific technical problems.

• Professional Technical Team: A team of 100+ engineers and technicians with an average of 8+ years of industry experience, proficient in the design and optimization of electrical appliance injection molds. They are skilled in handling technical difficulties such as flame-retardant part molding, food-grade material processing, and high-precision assembly structure design.

• Strong Production Capacity: Our factory covers an area of 12,000 square meters, equipped with 100+ sets of advanced production and testing equipment (CNC milling machines, EDM machines, wire cutting machines, CMM, high-precision injection molding machines, etc.), with an annual production capacity of 200+ sets of injection molds.

• Strict Quality Management System: Certified by ISO9001:2015 and IATF16949, we implement full-process quality control from raw material incoming inspection to finished product delivery. We have established a professional quality inspection team and equipped with complete testing equipment to ensure product stability and reliability.

• Improved Supply Chain: Cooperate with reliable domestic raw material suppliers to ensure stable supply and consistent quality of mold steel and plastic materials; integrate upstream and downstream resources to realize cost optimization and timely delivery, effectively reducing client production costs.

• Global Service Capabilities: Cooperate with well-known international logistics companies (Maersk, COSCO) to provide efficient and safe global shipping services, leveraging the geographical advantage of Qingdao Port to shorten delivery time. We offer 24-hour online technical support and a 12-month quality guarantee to solve after-sales problems promptly for clients around the world.

Customer Case: Electrical Appliance Injection Mold Project for North American Client

Our client is a leading household appliance manufacturer in the United States, specializing in the production of high-end smart refrigerators. They encountered problems with their original injection molds for refrigerator door liner components, including serious shrinkage marks on the surface (affecting product aesthetics) and low production efficiency , which led to failure to meet the market launch schedule of new products. In 2023, they partnered with us to customize a set of high-precision injection molds for their new model’s refrigerator door liners.

Our technical team first conducted a detailed analysis of the client’s refrigerator door liner drawings and performance requirements (flame retardancy, impact resistance, surface finish). We used UG software to build a 3D model of the injection mold and simulated the injection molding process, optimizing the mold’s cooling system by adding 20 cooling channels to ensure uniform cooling and avoid shrinkage. We selected S136 mold steel with high polishability and implemented a strict heat treatment process to enhance the mold’s service life. For the plastic material, we recommended flame-retardant ABS that meets US UL certification standards. During the debugging stage, we adjusted the injection parameters (injection temperature, pressure, holding time) for multiple times and conducted a 48-hour continuous trial injection test to verify the mold’s stability.

The final delivered injection molds achieved excellent results: the surface of the refrigerator door liners was smooth without shrinkage marks, fully meeting the client’s aesthetic requirements; the production efficiency was increased to 950 parts per day ; the mold service life was guaranteed to be more than 1.2 million shots. The client highly recognized our product quality and technical service, and signed a long-term cooperation agreement with us, covering multiple models of refrigerator component molds.

Why Choose Qingdao Xinlongji?

1. Professional Customization for Electrical Industry: We focus on the R&D and manufacturing of electrical appliance injection molds, with in-depth understanding of the performance requirements and industry standards of electrical parts (e.g., flame retardancy, food grade, waterproofing), ensuring that our solutions are highly compatible with client needs.

2. One-Stop Integrated Service: From mold design, fabrication to finished product injection molding and assembly, we provide a full range of services, helping you simplify the supply chain and reduce communication and management costs.

3. Proven Technical Strength: Our professional technical team and advanced simulation technology can effectively solve various complex problems in electrical appliance injection molding, ensuring product quality and production efficiency.

4. Reliable Quality Assurance: International quality system certification and full-process quality control ensure that our products comply with global industry standards, minimizing your production risks and helping you enter the international market smoothly.

5. Efficient Global Support: We have rich experience in international trade and perfect global logistics channels, ensuring timely delivery of products to your designated location. Our 24-hour technical support team provides professional after-sales services to solve your worries.

Qingdao Xinlongji Metal Manufacturing Co., Ltd. is committed to becoming a trusted partner in the global electrical appliance injection mold industry. We look forward to cooperating with you to create greater value! For more information about our products and services, please feel free to contact us.