PVC pipe manufacturing process involves several key stages, from raw material preparation to final quality control.
- Material charging
- Injection
- Pressure hold
- Cooling
- Demold & ejection
It is produced by pvc injection molding machine. PVC pipe manufacturing machine is a kind of professional plastic processing equipment to manufacture PVC pipe materials, which is made into pipe joints by heating and melting PVC raw materials through the process of injection molding. This machine have chrome-plated screws and barrels for PVC, UPVC, CPVC as well as powder PVC. In the production process, the temperature needs to be strictly controlled, and a temperature control system and fan are installed to ensure product quality.
Steps of PVC pipe manufacturing process
PVC (Polyvinyl Chloride) pipes are widely used for plumbing, drainage, irrigation, and other applications due to their durability, corrosion resistance, and cost-effectiveness.
The manufacturing process of PVC pipes involves several steps, from raw material preparation to final product testing. Here’s the five steps of how PVC pipes are manufactured.
Material charging
- PVC raw materials enter the heating unit of the machine through the hopper: screw and barrel. In the middle of the barrel is a rotating screw. The rotation of the screw will push the material forward.
- And the screw moves backwards while rotating. The screw gradually rotates backwards to push the PVC material forward. During the process of advancement, PVC particles are melting and finally pushing into the front end of the material barrel.
Injection
- Once the front end of the material barrel is filled with enough PVC raw material. The screw stops pre molding and is pushed forward by the hydraulic cylinder at the back to quickly squeeze the melted raw material at the front end, forcing the melted PVC to enter the mold through the nozzle, gate, and runner.
- Push the screw with sufficient pressure to allow the melt to enter the mold from the nozzle.
Pressure hold
- Maintain this pressure to ensure shape retention during PVC cooling.
Cooling
- Cooling is achieve by passing the cooling fluid through the channels around the mold.
- This can be water or other coolant. Once cooled, the product will spray out. During cooling, the machine will use the cooling time to charge the material, so that we can shorter the cycle time.
Demold & ejection
- The mold opens and the core puller begins to work. Because PVC pipe joint molds often have multiple sets of core pulling. Therefore, demolding takes time.
Five types of PVC pipe fitting
- Water supply Pipe Fitting
- Electrical Pipe Fitting
- Drainage Pipe Fitting
- PPR/PE Pipe Fitting
Water supply Pipe Fitting
PVC water supply pipe fitting include direct joints, three-way joints, four-way joints, elbows, flange joints, clamp joints, etc. These joints are suitable for PVC pipes and have good chemical stability and corrosion resistance.
Electrical Pipe Fitting
It used to connect PVC conduit, mainly used for buried wires in walls or other pipeline systems. This type of joint can help wires or pipes pass smoothly through walls or other structures, and ensure the sealing and stability of the connection.
Drainage Pipe Fitting
Common methods for connecting PVC drainage pipes include using sealing gaskets, bonding, and flange connections.PVC pipe coupling, for water drainage. There are many PVC pipe sizes, so the PVC pipe fitting.
PPR/PE Pipe Fitting
PPR and PE pipes are two commonly used water supply pipeline materials, which have significant differences in structure and performance. Has high plasticity and heat resistance, commonly used in water supply pipelines in home decoration projects.
How is pvc manufactured
- Material Preparation
- Melting the PVC
- Injection into Mold
- Cooling and Solidification
- Ejection of the Part
- Post-Processing
PVC injection molding is a precise and efficient manufacturing process used to create durable and versatile plastic parts. Here’s a concise overview of how PVC manufactures using an injection molding machine:
Material Preparation:
Melting the PVC:
Injection into Mold:
Cooling and Solidification:
Ejection of the Part:
Post-Processing:
How to choose pvc injection molding machine to produce pvc pipe fittings
- Analyze pvc pipe fittings drawings or send samples
- Designing pvc pipe fittings mould
- Choosing adapted machine according pvc pipe fittings mould size
Analyze pvc pipe fittings drawings or send samples
We will analyze the products according to the product information (including weight, size and production of pvc pipe fittings) or drawings sent by the customers.
In addition, customers can also send samples of pvc pipe fittings, we will split and analyze, in order to prepare for the design of molds.
Designing pvc pipe fittings mould
After analyzing the customer’s pvc pipe fittings drawings or samples, our designers start to design the molds.
And after designing the pvc pipe fittings molds, we will confirm with the customer and then prepare for production.
Choosing adapted machine according pvc pipe fittings mould size
Pvc pipe fittings injection molding machine depends on the size of the mold. Therefore, after designing the molds of pvc pipe fittings chart, we will choose the right machine according to the size of the molds.
Haichen Pvc injection molding machine supplier
We supply Haichen plastic injection molding machines, molds and auxiliary equipment according to our customers’ requirements and offer customized and innovative solutions to meet their needs, while providing excellent customer service and support.
If there is any demand for PVC pipe manufacturing, welcome to consult us.
