Shenzhen Second Intelligent Equipment Co., Ltd., a benchmark manufacturer of precision fluid control and automated coating equipment in China, has over a decade of in-depth expertise in PCB conformal coating machine processes. We independently developed the SEC-450J inline conformal coating machine and the matching SEC-450J-GH mercury lamp curing oven integrated production line, a fully automatic spraying line tailored for 3C electronics and high-end PCB manufacturing to handle UV & moisture dual-cure conformal coatings.
Boasting stable and precise coating performance, robust customized modification capabilities and one-stop full-line delivery services, this complete production line has been deployed in mass production workshops of a Fortune 500 manufacturing enterprise. To date, the customer has placed repeat orders for more than 10 units, making it the standard mainstream production equipment for high-end electronic conformal coating protection processes.
I. SEC-450J Precision Conformal Coating Machine: Custom Y-axis Adjustable Dual Spray Valves for Automatic Spraying of Dual-Cure Conformal Coatings
The SEC-450J is a floor-standing inline selective coating machine developed by Second Intelligent under its jet product line. Its core process focuses on full-area conformal coating spraying and component bonding protection for PCBs. Natively compatible with mainstream UV & moisture dual-cure conformal coatings available on the market, its complete mechanical, electrical, glue supply and software systems are deeply optimized around dual-cure coating spraying processes, perfectly addressing the demand for full coverage spraying on high-density PCBs and circuit boards with complex components.
1. Core Mechanical Motion & Customized Valve Structure (Key Custom Upgrade: Y-axis Adjustable Dual Spray Valves)
The machine adopts a servo 3-axis lead screw transmission architecture, fitted with high-precision TBI lead screws and HIWIN linear guides on the X and Y axes. The 3-axis repetitive positioning accuracy reaches ±0.02mm, enabling stable operation without jitter at a maximum moving speed of 500mm/s. It meets the cycle requirements of mass continuous spraying, maintaining zero positional deviation and consistent coating thickness during long-hour mass production.
To fulfill the customer’s demand for full-coverage spraying on large-format circuit boards, Second Intelligent implemented exclusive customized modification by equipping asynchronous dual domestic atomizing spray valves. Each valve unit is fitted with an independent 75mm stroke vertical cylinder, allowing asynchronous glue control for the two valves without mutual interference. The valve assembly supports wide-range Y-axis adjustment, with an adjustable spraying width ranging from 80mm to 150mm. Combined operation of the two atomizing valves enables one-pass full coverage spraying on 500×450mm extra-large PCBs, completely eliminating common industry pain points such as missing coating and uneven thickness caused by segmented spraying from traditional single-valve, fixed-width equipment.
The complete conveying system comes standard with a 5mm stainless steel chain conveyor, supporting bidirectional track flow switching. A single unit can be freely set to convey boards from left to right or right to left, facilitating flexible production line layout to match the workshop’s assembly line direction. The conveyor supports automatic width adjustment to accommodate mixed production of PCBs with varying widths.
The entire line adopts a unified standard working height, with adjustable board passing height to fit circuit boards carrying components of different thicknesses. The machine frame sheet metal is made of corrosion-resistant mirror stainless steel with uniformly finished aluminum parts. The whole line features a standard off-white & light gray paint scheme paired with uniformly light blue acrylic protective panels. SMC original two-unit pneumatic components are adopted throughout, delivering a premium appearance, easy cleaning, and compliance with export standards for overseas clean workshops.
2. Closed Anti-Splash Stainless Steel Glue Supply System for Uninterrupted Mass Production with Bulk Conformal Coatings
To support long-hour non-stop spraying production using large bulk packaging conformal coatings, the SEC-450J is equipped with a full set of integrated stainless steel glue supply assemblies. Fully sealed pipelines eliminate glue volatilization and splashing contamination:
1.A 5L large-capacity stainless steel glue tank fitted with an external wide filling funnel for direct bulk conformal coating refilling from outside the tank. A high-precision electronic scale mounted at the tank bottom monitors real-time glue volume and triggers audible & visual low-glue alarms to avoid mass product defects due to glue depletion.
2.An independent 3L stainless steel cleaning tank paired with dedicated dipping and glue discharge cups. The glue discharge pipeline is hermetically connected to a waste liquid collection tank with a full-level overflow alarm to prevent workshop contamination from spilled conformal coating waste.
3.To tackle glue splashing during spraying, all solenoid valves and pneumatic components on the Z-axis are covered with sealed protective housings to isolate atomized coating mist from corroding precision electrical parts, drastically reducing equipment failure rates and extending overall service life.
4.A high-power exhaust vent is reserved on the machine body to timely discharge volatile organic fumes generated during spraying, safeguarding operator safety and complying with environmental control standards for overseas factories.
3. Intelligent Code Scanning Industrial Control System with Full English Interface for One-Stop Overseas Export Compliance
The machine is equipped with genuine Win10 English industrial control operating system, paired with industrial-grade code scanning components that also support Y-axis positional adjustment. Once PCBs enter the line and are scanned, the system automatically retrieves the exclusive spraying program corresponding to each product, realizing one-code-one-process traceability to facilitate digital production management in factories. No vision camera is installed on the unit to simplify equipment structure and lower subsequent maintenance costs, while reserved MES system expansion ports support upgrades for smart factory transformation.
All touchscreen operation interfaces, handheld teach pendants, electrical markings and pipeline labels support one-click switching between Chinese and English. The machine’s operating interface is preset to English before packaging and shipment. Clear English labels are affixed to all critical components including air pipes, cables, connectors, valve units and glue tanks, lowering barriers for overseas customers during on-site installation, commissioning and daily operation & maintenance.
The complete electrical configuration complies with power supply standards for overseas factories: input AC220V 50Hz with international British standard plugs, and compatible factory air pressure of 0.4–0.7Mpa. Non-essential modules including safety light curtains, automatic needle alignment and independent automatic glue weighing are streamlined to control customer procurement costs while meeting all process requirements.
4. Factory Outfit & Standardized Export Delivery Specifications
Every SEC-450J conformal coating machine is shipped complete with a full maintenance tool kit and dedicated spray valve repair kit, alongside full consumables including sealing rings and glue tubes. Prior to delivery, full machine photos and complete commissioning videos are captured and sent to customers for remote pre-acceptance. Equipment is packed in customized solid wooden export crates with minimized overall dimensions. Standard English shipping marks and international transport warning labels are pasted on all four sides of crates, with a full set of acceptance materials including packing photos, nameplate photos, accessory photos, sealing photos and loading photos provided.
II. SEC-450J-GH Mercury Lamp Curing Oven
Many customers confuse the two models: the suffix “GH” indicates this unit is a dedicated mercury lamp UV curing oven matched to the conformal coating machine. It is connected in series with the SEC-450J coating machine to form a fully closed-loop automatic production line of “automated spraying + UV pre-curing”.
1. Specialized Curing Process Adapted to UV & Moisture Dual-Cure Conformal Coatings
Mainstream dual-cure conformal coatings on the market adopt a “fast UV surface shaping + deep moisture curing” mechanism. After spraying, full-spectrum UV mercury lamps are required to complete rapid surface pre-curing and prevent PCB stacking adhesion and glue sagging. Shadowed areas beneath components and pin gaps undergo full secondary curing via ambient workshop moisture to achieve dead-zone-free PCB protection.
The SEC-450J-GH is fitted with full-spectrum mercury lamp light sources covering a broad wavelength band of 200–450nm, perfectly matching the light initiator absorption range of dual-cure conformal coatings. It delivers uniform and stable curing energy to enable fast surface drying for thick and dark coating layers, making up for the shortcomings of pure LED UV light sources that lack deep curing capacity.
The effective curing area of the oven fully matches 700×450mm large-format PCBs, with independently adjustable board passing heights at the front and rear of the furnace body. The conveyor supports manual width adjustment, while chain conveying structure, profile specifications, three-color warning lights and black anti-slip foot pads share unified standards with the front-end coating machine. The entire line features integrated visual and mechanical structures with seamless splicing for fast on-site customer assembly.
2. Hardware, Electrical & Consumable Configuration of the Curing Oven
1.Distinct power supply specifications from the coating machine: the SEC-450J-GH curing oven adopts high-power industrial AC380V 50Hz power supply fitted with heavy-duty British standard plugs to meet stable power demands of large overseas factories.
2.Focused exclusively on core curing processes, the oven omits code scanning, vision inspection and glue weighing functions, delivering a streamlined structure with fewer fault points and lower long-term mass production operation & maintenance costs.
3.The curing oven also supports full English operation interfaces and English component labeling. Packaging processes, export wooden crate standards and acceptance video requirements are fully consistent with the SEC-450J coating machine, enabling synchronized delivery and acceptance of the complete line.
III. Core Advantages of Second Intelligent SEC-450 Series Production Lines: Mass Production Validation at Fortune 500 Enterprise with Over 10 Repeat Orders
The integrated SEC-450J + SEC-450J-GH coating and curing production line has been running stably for years in the 3C electronics mass production workshop of a global Fortune 500 manufacturing enterprise. The customer’s workshop enforces stringent industry standards for coating uniformity, continuous line stability and overseas equipment adaptability. After equipment deployment, the reject rate of PCB conformal coating processes dropped significantly and overall production cycle efficiency improved by 35%. Based on long-term stable mass production performance, the customer placed multiple batches of follow-up procurement, with total repeat orders exceeding 10 units, establishing a benchmark case for automated high-end electronic conformal coating production lines.
1.Broad-spectrum process compatibility: The complete line is natively compatible with all types of UV & moisture dual-cure PCB conformal coatings. The full workflow including dual atomizing valve spray coating, stainless steel chain inline conveying and full-spectrum mercury lamp UV pre-curing undergoes coordinated process optimization. Customers can switch mass production to conformal coatings of different brands and viscosities via simple parameter adjustment without equipment modification.
2.In-depth customized modification capability: Custom non-standard upgrades can be implemented based on customer PCB dimensions, spraying width, coating viscosity, workshop layout, factory power and air supply conditions, including Y-axis adjustable valve assemblies, bidirectional track flow, conveyor width adjustment range, industrial control system language and curing light source power. The core customized upgrade for this benchmark project – Y-axis adjustable dual spray valves – perfectly solved the customer’s challenge of full-coverage spraying for extra-large circuit boards.
3.One-stop supporting services for overseas exports: Complete English operating system, British standard electrical accessories, standardized solid wooden export crates, full pre-acceptance video materials and matched maintenance spare parts lists. We provide full export delivery supporting services for Southeast Asian, European and American customers building overseas factories.
4.Long-term standardized spare parts support: A complete list of wearing parts is provided with each batch of equipment, including photoelectric sensors, timing belts, conveyor chains, valve sealing rings and mercury lamp tubes. Standard spare parts procurement lists are also offered, and advance stock preparation can drastically reduce production downtime risks for customers.
IV. Full-Line Customization Services from Second Intelligent: More Than Standalone Equipment Supply
Beyond customized standalone production of SEC-450J coating machines and SEC-450J-GH curing ovens, Second Intelligent delivers one-stop full-process automated production line customization services for conformal coating, covering the full chain of pre-production process scheme planning, 3D workshop layout design, non-standard structural equipment modification, mechanical-electrical-software integration, factory pre-commissioning, overseas on-site installation training and lifecycle after-sales maintenance.
According to customer production takt time, PCB product specifications, workshop space dimensions and conformal coating process requirements, auxiliary equipment such as automatic loading conveyors, board turnover machines, UV coating inspection stations, finished board unloading storage tables and auxiliary drying tunnels can be flexibly matched to build fully unmanned automated conformal coating production lines. All line profiles, conveyor chains, standard working heights, paint colors and acrylic protective panels adopt unified standardized design, balancing aesthetic integration and equipment interoperability to facilitate future production line expansion and new workstation addition by customers.
For various scenarios including mixed production of multi-category PCBs, automation retrofits of outdated production lines and new factory construction overseas, dedicated solution engineers deliver one-on-one customized production schemes, alongside glue sample testing, complete process reports and English-language equipment operation training documents. We truly deliver a complete solution covering the full cycle from conformal coating process R&D to automated mass production line launch.
