We provide overall solutions for processing equipment. Our standard equipment is very complete, all are in stock and can be shipped quickly. We have our own equipment factory, which can lightly customize equipment according to customer requirements, such as ordering different appearances and brands for agents, and non-standard equipment according to customer requirements.
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Why choose us?
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Should I worry about the quality?Before delivery, we do test the machine working condition for you.
Take a video of the normal operation of the machine to you, and then confirm the delivery. -
How can I know your machine is designed for my product?You tell us the specific parameters of your product, or you can send us samples of your product and we test it on machine. Video for you to make samples
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How to operate the equipment?My friend, don't worry about it, we have made videos for you, it will show you how to do it step by step. Contact our engineers at any time when you don’t understand, support video and telephone communication.
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When the machine can't work well,What should I do?The Engineer is online for 24-hours, they can check the problems and then give you solution way very soon. Please rest assured that manual will be offered along with machine,ensuring you can operate the machine easily.
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Does your company make mould by yourself?Yes, we are manufacturer with about two decades of molding experience.
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Can the machine customized only for my products?Yes, most machines can be customized as per clients’requirements, including the structure special design and brand of parts special request.
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How to make a custom product from your company?If you have drawings or samples, please send us and tell us your specific requirements such as material, tolerance, surface treatments and the amount you need, etc.
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How about the quality?We will make 100% full inspection and provide the inspection reports.
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What is the business item for this project?1.Delivery Date: within 45 working days after receive the deposit and samples or drawing confirmed by buyer
2.Port of Loading: based on customer needs
3.Payment: 100% TT deposit -
How long is the warranty?Most products come with a one-year warranty.
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Do you accept OEM or ODM?Yes
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What is your terms of packing?Generally,we pack our goods with proper wooden box.
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What is your terms of delivery?EXW,FOB
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How do you make our business long-term and good relationship?1.We keep good quality and competitive price to ensure our customers benefit;
2.We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from; -
What is your sample policy?We can supply back sample for you, but the customers have to pay the freight cost.
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How about your delivery time?Generally, 2-3 weeks after received advanced payment, The specific delivery time depends on the items and the quantity of your order.
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What Material Is Best for Automotive Controller Potting?
For automotive controller potting applications, it is recommended to use a potting compound with high thermal conductivity, excellent flowability, low curing shrinkage, UL94 V-0 flame retardancy, and strong electrical insulation properties.
For example, Rangjin 1850 is well-suited for automotive controllers, motor controllers, water pump controllers, and onboard power modules, helping improve heat dissipation, reliability, and long-term performance.
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Why Does Automotive Controller Potting Require High Thermal Conductivity?Power devices such as MOSFETs, IGBTs, and control chips inside automotive controllers continuously generate heat during operation.
A highly thermally conductive potting compound helps transfer heat efficiently from electronic components to the housing or heat sink structure, reducing hotspot temperatures and improving the long-term reliability and stability of the controller. -
Why Is Low Curing Shrinkage Important for Automotive Potting Compounds?
If the potting material has a high curing shrinkage rate, it may generate internal stress on the PCB, solder joints, capacitors, and electronic components during curing.
A low-shrinkage potting compound helps minimize mechanical stress, reducing the risk of cracking, solder joint failure, and long-term reliability issues, especially under thermal cycling and vibration conditions.
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Why Is UL94 V-0 Flame Retardancy Important for Automotive Electronics Potting?
UL94 V-0 indicates a high level of flame-retardant performance.
For new energy vehicles, high-voltage controllers, onboard power supplies, and power modules, using a V-0 flame-retardant potting compound helps improve operational safety under abnormal conditions such as overheating, short circuits, or electrical faults.
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What Applications Is Rangjin 1850 Suitable For?Rangjin 1850 is widely used in:
• Automotive controller potting
• Motor controller potting
• Water pump controller potting
• Onboard power module potting
• New energy vehicle electronic module potting
• Industrial power supply and power module encapsulation
It offers advantages such as high thermal conductivity, excellent electrical insulation, UL94 V-0 flame retardancy, low stress, and strong environmental resistance, making it suitable for demanding automotive electronic applications. -
Why is Rangjin 2026FR recommended for solenoid valve potting?The key challenge in solenoid valve potting is achieving reliable adhesion to multiple materials. RJ 2026FR is specifically optimized for strong affinity to magnet wire, iron cores, and metal housings, delivering bond strength at a chemical‑bonding level. Additionally, its V‑0 flame retardancy and good flowability allow it to perfectly fill complex internal cavities while ensuring safety, preventing localized hot spots.
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How can an electronic potting compound balance flame retardancy and mechanical performance?Many flame‑retardant compounds become brittle due to excessive flame retardant additives. Rangjin, through microencapsulated flame retardant technology and toughening modification, has achieved a balance between UL 94 V‑0 rating and excellent impact strength in RJ 2026FR. This ensures the encapsulant provides sufficient mechanical support while protecting the circuitry.
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What are the advantages of epoxy potting compounds in automotive electronics?Compared to silicones or polyurethanes, epoxy potting compounds (such as RJ 2026FR) offer higher mechanical strength and better chemical resistance (e.g., to engine oil, coolant). Under the IATF 16949 quality system, Rangjin's products deliver exceptional batch‑to‑batch stability, meeting the automotive industry's demand for "zero‑defect" quality.
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How can cracking after motor potting be prevented?The root cause of cracking is thermal shrinkage stress. The solution involves three steps: First, choose a material with a low coefficient of thermal expansion (CTE), such as RJ 2026FR. Second, optimize the curing process to avoid rapid exothermic reactions that lead to internal stress buildup. Third, enhance adhesion strength to the substrate so that the interface can withstand thermomechanical stress.
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