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3 Layer PVC Foam Core Pipe Making Machine

Home Product Plastic Pipe Making Machine 3 Layer PVC Foam Core Pipe Making Machine

3 Layer PVC Foam Core Pipe Making Machine

A PVC foam core pipe making machine is an extrusion production line designed to manufacture lightweight PVC pipes with a co-extruded structure featuring solid inner and outer PVC layers and a foamed core layer. The multi-layer structure reduces pipe weight and material consumption while maintaining sufficient stiffness and mechanical strength for drainage and other piping applications.

Application: Acoustic drainage pipes, non-pressure sewer pipes, underground drainage systems, ventilation ducts, and cable conduit pipes.
Pipe structure: three layer (smooth inner layer + foamed core layer + durable outer layer)

As a professional plastic extrusion equipment manufacturer, EANS offers complete turnkey solutions for high-performance 3 layer PVC foam core pipe making machines, helping manufacturers reduce material consumption, maintain stable long-term production, and deliver premium acoustic pipe quality for demanding infrastructure projects.

Specifications
Model

SJ65/132

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Application Specification Key Points Features Production Process FAQ

APPLICATION

SPECIFICATION OF 3 LAYER PVC FOAM CORE PIPE MAKING MACHINE

Parameters Of 3 Layer PVC Foam Core Pipe Making Machine

Model	SJZ65/132
Extruder Type	Conical Twin Screw Extruders
Wall Thickness Range	2–6 mm
Maximum Extrusion Capacity	450 kg/h
Pipe Diameter Range	50mm - 160mm mm
Raw Material	UPVC, PVC-U, and rigid PVC compounds with foaming formulations.
Co-Extrusion Configuration	SJSZ65/132 + SJSZ65/132

KEY POINTS OF MULTI LAYER PVC FOAM CORE PIPE PRODUCTION

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The PVC foam core pipe extrusion line typically consists of a PVC extrusion system, co-extrusion unit, specially designed pipe die, vacuum calibration tank, cooling tank, haul-off machine, cutting machine and stacking system. The equipment configuration can be customized according to pipe diameter, wall thickness, layer structure, raw material formulation and required production capacity. The production of multi layer PVC foam core pipes requires precise control of material formulation, extrusion, layer distribution and cooling. The following are the key points to ensure stable production and consistent pipe quality.

1. Three-Layer Structure: A typical 3-layer PVC foam core pipe consists of a solid outer layer, a foamed middle core layer and a solid inner layer. The outer and inner layers provide strength and surface quality, while the foamed core reduces pipe weight and material consumption.

2. PVC Material Formulation: The PVC formulation must be properly balanced for each layer. The foam core layer requires suitable foaming agents, stabilizers and processing additives to achieve a uniform cellular structure, while the inner and outer layers are formulated to provide the required mechanical strength and surface finish.

3. Independent Extrusion Control: A 3-layer PVC foam core pipe production line normally uses multiple extrusion systems to control the different layers independently. Extruder temperature, screw speed, feeding rate and melt pressure need to be coordinated to maintain stable layer thickness.

4. Precise Co-Extrusion: The three PVC layers must be evenly distributed through a specially designed co-extrusion die. Precise melt flow control helps maintain a consistent inner layer, foamed core and outer layer throughout the pipe.

5. Uniform Foam Core: The foamed middle layer is one of the most important parts of the process. Stable foaming conditions are required to achieve a uniform cellular structure, consistent density and sufficient support for the outer and inner layers.

6. Vacuum Calibration and Cooling: After extrusion, the pipe passes through a vacuum calibration tank and cooling system. Stable vacuum pressure, water temperature and cooling conditions help control the pipe diameter, roundness and dimensional accuracy.

7. Haul-Off and Cutting: The haul-off speed must match the extrusion output. Stable traction prevents deformation and dimensional fluctuations, while the cutting system produces pipes with the required length and clean ends.

8. Quality Control: Key parameters such as layer thickness, foam density, pipe diameter, wall thickness, surface quality and weight per meter should be monitored during production. Proper process control ensures consistent quality and stable long-term operation.

PVC FOAM CORE PIPE STRUCTURE

A typical PVC foam core pipe has a multi-layer structure consisting of an outer PVC layer, a foamed PVC core layer and an inner PVC layer. The solid outer and inner layers provide surface quality, stiffness and durability, while the foamed middle layer reduces the overall weight and material consumption of the pipe.

The exact layer structure and formulation can be adjusted according to the required pipe performance, diameter, wall thickness and application.

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FEATURES OF EANS MULTI LAYER PVC FOAM CORE PIPE MAKING MACHINE

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1. Precision 3 Layer Co-Extrusion for Consistent Pipe Structure

The EANS 3 Layer PVC foam core pipe making machine uses a dedicated three-layer co-extrusion system to form the inner skin, foamed core, and outer skin in a single continuous process. The optimized extrusion and die-head configuration helps maintain consistent layer distribution, wall thickness, and bonding quality, which is essential for producing reliable PVC-U multilayer foamed core pipes.

2. Dual SJSZ65/132 Extruder Configuration

EANS configures the 3 Layer PVC foam core pipe making machine with two SJSZ65/132 conical twin screw extruders for stable PVC processing and synchronized material delivery. The coordinated extrusion system provides precise control of the different pipe layers and supports continuous production of 3 layer PVC foam core pipes with consistent dimensions.

3. Controlled Foam Core Formation

The foamed core is the key functional layer of a PVC-U multilayer foamed core pipe. EANS optimizes extrusion temperature, melt pressure, material formulation, and foaming conditions to achieve a uniform cellular core. Stable foam formation helps control pipe density while maintaining the mechanical performance required for drainage and non-pressure applications.

4. Integrated PLC-Controlled Production Process

The EANS 3 Layer PVC foam core pipe making machine integrates extrusion, vacuum calibration, cooling, haul-off, and cutting into a synchronized production system. PLC-based control allows operators to monitor and adjust critical production parameters, helping maintain stable output and repeatable pipe quality during extended production runs.

5. Flexible Production for Different PVC-U Pipe Requirements

EANS can configure the 3 Layer PVC foam core pipe production line according to pipe diameter, wall thickness, material formulation, output requirements, and target application. With appropriate tooling and process adjustments, the line can be adapted for different PVC foam core drainage pipe specifications and other rigid PVC non-pressure pipe applications.

multi-layer-PVC-foam-core-pipe-making-machine

MULTI LAYER PVC FOAM CORE PIPE PRODUCTION PROCESS

Machine list of multi layer PVC foam core pipe making machine

Component	Quantity
Automatic Vacuum Feeder & Hopper	2 Sets
SJSZ65/132 Conical Twin-Screw Extruder – Solid Layers	1 Set
SJSZ65/132 Conical Twin-Screw Extruder – Foamed Core	1 Set
3 Layer PVC Co-Extrusion Die Head & Molds	1 Set
Vacuum Calibration Tank	1 Set
Spray Cooling Tank	1 Set
Three-Claw / Four-Claw Haul-Off Machine	1 Set
Planetary Dust-Free Cutting Machine	1 Set
Pipe Stacker	1 Set

1. Raw Material Feeding: PVC materials, additives, foaming agents, and color masterbatch are automatically fed into the corresponding extruders.
2. Extrusion & Plasticization: The conical twin-screw extruders melt, mix, and plasticize the materials for the solid skin and foamed core layers.
3. 3 Layer Co-Extrusion: The materials enter the co-extrusion die head to form the solid inner layer, foamed core, and solid outer layer of the 3 Layer PVC foam core pipe.
4. Vacuum Calibration & Cooling: The PVC foam core pipe is calibrated to the required diameter and cooled to stabilize its dimensions and structure.
5. Haul-Off: The haul-off unit continuously pulls the PVC-U multilayer foamed core pipe at a controlled speed to maintain consistent dimensions.
6. Cutting: The finished PVC foam core pipe is automatically cut to the preset length.
7. Inspection & Packaging: The finished acoustic 3-layer PVC foam core pipe is inspected for appearance and dimensions before being packaged for delivery.

FAQ

What is a PVC foam core pipe?

A PVC foam core pipe is a lightweight, multi-layer PVC pipe with a foamed middle layer (core) sandwiched between solid PVC inner and outer layers. The three-layer structure is typically produced by a co-extrusion process.

How is PVC foam core pipe manufactured?

PVC foam core pipe is typically manufactured using a 3-layer co-extrusion process. The process combines two solid PVC layers with a foamed PVC core to produce a lightweight pipe with good stiffness and reduced material consumption.

PVC Foam Core Pipe Production Process：Raw Material Mixing → Extrusion → 3-Layer Co-Extrusion → Die Forming → Vacuum Calibration → Cooling → Haul-Off → Cutting → Stacking

What is the difference between PVC foam core pipe and solid PVC pipe?

The main difference is the wall structure. A solid PVC pipe has a uniform, dense PVC wall, while a PVC foam core pipe has a three-layer structure with a foamed middle core.

What diameter can the PVC foam core pipe machine produce?

The PVC foam core pipe machine can be configured to produce pipes in different diameters according to the required application and production capacity. The pipe diameter is determined by the extrusion die, vacuum calibration system, haul-off unit and extruder configuration.

EANS can customize the PVC foam core pipe production line according to the required pipe diameter, wall thickness, layer structure and output. Customers can provide their target pipe specifications so that the appropriate extruder, die and downstream equipment can be selected.

How many layers does a PVC foam core pipe have?

A typical PVC foam core pipe has three layers. It is manufactured using a 3-layer co-extrusion process:

Outer PVC Layer – Provides surface quality, protection, and mechanical strength.
Foamed PVC Core Layer – The lightweight middle layer reduces material consumption and overall pipe weight.
Inner PVC Layer – Provides a smooth internal surface and contributes to the pipe's structural performance.

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COMPANY PROFILE

Zhangjiagang EANS Machinery is a professional plastic extrusion machine manufacturer specializing in the design, development, and production of complete extrusion lines and auxiliary equipment. With over 20 years of experience in the plastics processing industry, EANS team provides reliable extrusion solutions for plastic manufacturers worldwide. Our product range includes single screw extruders, twin screw extruders, and customized plastic extrusion production lines for various applications. With advanced extrusion technology, precision manufacturing capabilities, and professional engineering support, EANS delivers complete turnkey solutions from extrusion system design and equipment manufacturing to installation guidance and production support. Our extrusion machines are designed to help customers achieve higher production efficiency, stable product quality, lower operating costs, and long-term production reliability. EANS extrusion equipment has been successfully supplied to customers across different markets and continues to earn trust from plastic manufacturers around the world.

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