PLC Controlled Chemical Cleaning Line for Precise Surface Treatment in Automotive Home Appliance and Aerospace Industries

Equipment Description:

Description and Structural Analysis of Fully Automatic Spray Pretreatment Equipment
I. Equipment Description ‌
Uses ‌
It is used for the automatic pretreatment of the surface of metal, plastic and other workpieces (such as degreasing, rust removal, phosphating, passivation, etc.), and achieves efficient cleaning and coating pretreatment through spray method.
How it works ‌
The parameters such as spray pressure, temperature and time are controlled by PLC or industrial computer, and the workpieces are processed in multiple stages (such as pre-cleaning, main spray, rinsing, drying, etc.) according to the preset program.
Core advantage ‌
Automation ‌ : The entire process requires no human intervention and supports continuous production.
High precision ‌ : Parameter programmable control to ensure processing consistency.
Energy saving and environmental protection ‌ : Recycling filtration system reduces wastewater discharge, heat recovery reduces energy consumption.
Application fields ‌
Industries that require precise surface treatment, such as automotive manufacturing, home appliance hardware, aerospace, and electronic components.
2. Process Flow chart ‌
Feeding → Pre-degreasing spray → degreasing spray → Water washing 1 → Surface adjustment → Phosphating → Water washing 2 → Pure water washing → Drying → Discharging

Main structures and components:

Main structure and core components (The following structures are arranged in the order of the process flow)
Sprinkler system ‌
Nozzle ‌ : fan-shaped/conical stainless steel nozzle for different angles and flow requirements.
Spray pipe ‌ : Corrosion-resistant PVC/ stainless steel pipe with pressure sensor and regulating valve.
High pressure pump ‌ : Magnetic drive pump or centrifugal pump, providing stable spray pressure (0.2-0.6MPa).
Conveying system ‌
Conveyor chain ‌ : Acid and alkali resistant chain or mesh belt, adjustable speed (0.5-5m/min).
Rotating mechanism ‌ : Optional workpiece self-rotation device to ensure no dead corners in the spray.
Tank structure ‌
Main treatment tank ‌ : PP/ fiberglass reinforced plastic, zoned design (pre-degreasing, degreasing, water washing, etc.).
Storage tank ‌ : Double-layer insulated structure with liquid level sensor and automatic liquid replenishment function.
Filtration circulation system ‌
Multi-stage filter ‌ : Bag filter (coarse filter) + cartridge filter (precision ≤25μm).
Circulating pump ‌ : Corrosion-resistant vertical pump, supporting 24-hour circulating filtration of bath solution.
Heating and temperature control ‌
Heating method ‌ : Steam heat exchanger/electric heating tube, PID temperature control accuracy ±2℃.
Temperature control module ‌ : PT100 temperature sensor + intelligent temperature controller.
Intelligent control system ‌
Main control unit ‌ : PLC (e.g. Siemens S7-1200) + touch screen human-machine interface (HMI).
Sensors ‌ : Flowmeters, pH meters, conductivity meters monitor process parameters in real time.
Data Management ‌ : Supports process recipe storage, fault alarm and production report generation.
Auxiliary system ‌
Exhaust system ‌ : Centrifugal fan + exhaust gas treatment unit (optional activated carbon adsorption).
Safety protection ‌ : emergency stop button, anti-slip platform, waterproof electrical cabinet.

Features:

1. High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.

2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.

3.It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.

4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.