Four Key Factors of PVC Dispensing Production
Worker: Programmers, Operators
Machine: PVC Dispensing Machine, Oven, Robot Production Line, Machine Layout
Material: Viscosity stability/fluidity
Mold: Standardized mold, proper size
Core of Stable and Efficient Production
Standardization is the key to stable, efficient automated production.
1.Standardized mold size, stable material ratio, consistent mold temperature change.
2.Stable material viscosity.
It greatly affected by workshop temperature; So we create a stable temperature field on production equipment.
3.Optimize bottlenecks based on process cycle times to boost unit output.
4 Select reasonable equipment, layouts, and advanced processes for PVC dispensing production.
Production Factor -- Worker
Program and process design: Establish production takt time based on your products, then select suitable equipment and processes.
For equipment that has already been purchased, we need calculate the production cycle time; then design the dispensing times for the face colors and the base color.
Subsequently, we determine the suitable number of parallel dispensing heads—avoiding the blind addition of extra heads or over sizing molds.
Production Factor -- Machine
Weldo PVC Dispensing Machine Improvements
Weldo Oven Improvements
Weldo Robot Production Line Improvements
Production factors — raw materials — PVC paste resin solution (PVC material)
When selecting raw materials, choose an oil with low viscosity and good fluidity for proper mixing. This ensures faster production speed, superior flowability, and reduced likelihood of void formation in the PVC paste resin solution (PVC material).
In production process, the transparent mixture obtained through thorough automatic stirring is first subjected to vacuum extraction, followed by color paste addition for coloring and another vacuum step before production commences. If the material is stored for an extended period, re-vacuum extraction is required to prevent surface bubbling (known as "matted material").
Production factors — Moulds
Size of the mold
The general mold size is 200mm*250mm.(for Products with relatively thin lines)
The mold size in the right image is approximately 280*220mm, which is too large. Large molds are prone to deformation, resulting in uneven dispensing and uneven heating during baking, leading to defective products.
The thickness of the mold, if the product is large, should be appropriately increased. Generally, the thickness of molds larger than 400*400mm should be 10-12mm.
The aluminum material for mold opening needs to be milled flat on one side first, and then milled flat on the other side before mold opening.
After each day's production, remove carbon deposits and dirt from the bottom of the mold to keep the bottom of the mold clean and flat.
Compatible Mold Design
For multi-size products, design spacing based on the largest size; smaller sizes use the same spacing for consistent needle alignment.
More molds/cavities boost output but depend on order volume; control mold quantity as needed.
For similar-sized products, standardize mold thickness, size, and cavity spacing to avoid frequent needle/needle position adjustments.
For small orders, use 1–2 larger molds with multiple product molds on the same machine to increase production flexibility.
Summary
Weldo has been committed to promoting automated droplet molding production for 19 years, from single automatic machines to fully robotic production lines. Over 1,000 factories worldwide use our equipment.
We are committed to promoting China's advanced PVC Dispensing production equipment and production technology to global customers.
If you have any questions about the selection of Weldo PVC
dispensing equipment and production processes, feel free to consult and communicate with us.
