Automatic Gravimetric Blender for Plastic Extrusion

+25% Output Efficlency

-15% Energy Consumption

99.6% Stable Operation Rate

Why our machiney stands out

Elimination of Human Error: Fully automates the complex physical weighing and batching of PVC resin, stabilizers, fillers, and processing aids based on digital presets.
Unmatched Dosing Precision: Utilizes ultra-sensitive Toledo load cells and dual-stage screw feeders to achieve micro-additive tolerances as strict as ±1–2 grams.
Complete Dust Containment: Features an entirely enclosed negative-pressure pneumatic conveying layout to eliminate airborne chemical dust and protect operator health.
Seamless Mixer Integration: Links directly with your high-speed heating and cooling mixer units to establish a highly efficient, fully continuous compounding line.

The MIDTECH Automatic Plastic Additives Auto-Weighing & Dosing System (Central Compounding & Batching System) is the ultimate technical upgrade for modern PVC pipe, profile, and sheet extrusion factories. Manually weighing toxic additives like lead or calcium-zinc stabilizers, processing aids, lubricants, and pigments is slow, labor-intensive, and highly prone to dosing mistakes that ruin batch quality.

Parameter

Model number	PFJ50	PFJ100	PFJ250	PFJ500	PFJ750	PFJ1000	PFJ3000
range	50kg	100kg	250kg	500kg	750kg	1000kg	3000kg
Number of buckets	5-15 buckets	5-15 buckets	5-15 buckets	5-15 buckets	5-15 buckets	5-15 buckets	5-15 buckets
Ingredients accuracy	5-10g	5-10g	5-10g	5-10g	5-10g	5-10g	5-10g
Preparation Time	100 seconds / 20 kg	100 seconds / 20 kg	100 seconds / 20 kg	100 seconds / 20 kg	100 seconds / 20 kg	100 seconds / 20 kg	100 seconds / 20 kg
Delivery distance	20m	20m	20m	20m	20m	20m	20m
The mode of delivery	Spiral feedstock	Spiral feedstock	Spiral feedstock	Spiral feedstock	Spiral feedstock	Spiral feedstock	Spiral feedstock
Transmission motor power	1.5w	1.5w	1.5w	1.5w	1.5w	1.5w	1.5w
Display resolution	0.1kg	0.1kg	0.1kg	0.1kg	0.1kg	0.1kg	0.1kg
Working power supply	AC220V	AC220V	AC220V	AC220V	AC220V	AC220V	AC220V
Delivery speed	Variable frequency can be tuned	Variable frequency can be tuned	Variable frequency can be tuned	Variable frequency can be tuned	Variable frequency can be tuned	Variable frequency can be tuned	Variable frequency can be tuned
Installed power	15kw	15kw	15kw	15kw	15kw	15kw	15kw

Core Advantages

High-precision micro-dosing module with Toledo load cells and dual-stage screws ensures accurate feeding without overshoot; built-in agitation prevents bridging, and modular hoppers allow flexible expansion.

Centralized batching storage: 304 mirror-polished hoppers resist residue, rotary valves dump instantly, level sensors alert low stock, pneumatic vibrators prevent bridging.

nclosed pneumatic conveying: vacuum sealing prevents leaks, pulse-jet filters reclaim dust, 99.9% capture for zero emission, and direct mixer connection.

Siemens PLC intelligence: touchscreen HMI monitors process, stores numerous recipes for instant changeover, logs batches automatically, and alerts on faults.

YOUR PARTNER IN PLASTIC PROCESSING

Midtech transforms plastics into possibilitles.

ConticLus today tarlormereebuut our torpliele pluasli processing solutions.

FAQ

How does the auto-weighing system handle highly cohesive or sticky additives like carbon black or lubricants?

Cohesive and sticky additives often cause bridging or clogging in standard hoppers. MIDTECH eliminates this issue by treating the internal surfaces of the dosing screws with specialized anti-stick coatings, adding active mechanical anti-bridging agitators inside each hopper, and installing pneumatic impact vibrators at the discharge throats. This ensures that even the most stubborn powders feed smoothly and precisely into the weighing scale.

What is the advantage of a centralized batching system over manual preparation for a PVC line?

Manual preparation relies heavily on operator accuracy, which drops due to fatigue, leading to compromised PVC profiles or pipes. Furthermore, handling loose chemical stabilizers poses serious health risks. Our automated system removes human error completely, guarantees a constant dosing accuracy of up to ±0.1%, cuts labor costs by requiring only one supervisor, and keeps the factory completely free of hazardous floating dust particles.

Can this system be customized to fit into an existing compounding room with a low ceiling?

Yes, our system is highly modular. If your mixing room lacks the vertical height for a traditional gravity-stack layout, our engineers can design a horizontal configuration where individual micro-dosing stations feed a central collection car traveling on a ground rail, or utilize flexible vacuum conveying pipelines to route materials over and around structural columns to match your exact spatial restrictions.