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Single-screw plastic extrusion equipment

A single-screw plastic extruder uses only one screw to process the raw material, producing the desired finished product. In contrast, an extrusion machine equipped with two screws operating in tandem is referred to as a twin-screw plastic extruder. Single-screw plastic extruders are commonly employed for extrusion molding of plastic products; their key advantages include stable extrusion performance, excellent plasticizing capabilities, and easy control of the barrel temperature. Moreover, single-screw extruders typically require lower power and simpler drive‑system configurations than twin-screw extruders, helping to reduce overall equipment manufacturing costs. For example…

2020

09-19

Sealing strip production line

Rubber sealing strips are a very common product in our daily lives; many of the seals used on doors and windows in homes are rubber seals. Based on their structure, rubber sealing strips can be divided into two types: single‑extrusion seals and composite seals. Different types of seals require different production equipment and processes. For example, single‑extrusion seals are manufactured using an extrusion line that employs a rubber extruder to form the product, followed by three-stage hot‑air curing ovens for in‑line curing, and finally water cooling to produce the finished item. Single‑extrusion rubber sealing strips, during production…

2020

09-21

Advantages of Pin-Type Rubber Extrusion Equipment

Pin‑type rubber extruders are commonly used for extruding rubber hoses, which is why they are often referred to as rubber hose extruders. However, pin‑type extruders are not limited to hose production; they are also employed in applications such as rubber cables and the extrusion of rubber tire treads. The key difference between a pin‑type rubber extruder and a conventional cold‑feed rubber extruder lies in the design of the barrel: several rows of pins are evenly distributed along the barrel to increase the extrusion pressure exerted on the rubber by the screw, thereby enhancing the density and sealing performance of the final product. These pins are inserted radially and perpendicularly into the barrel, while the rubber compound resides within the barrel itself.

2020

09-22

Silicone tube extrusion equipment

Silicone tube extrusion equipment: There are many types of rubber tubes, each with its own suitable production process. Taking silicone tube manufacturing as an example, the choice of rubber extruder depends on the specific type of tube. For instance, producing single‑layer silicone tubes requires a dedicated silicone rubber extruder for extrusion molding. Because silicone rubber is soft and easy to shape, the first vulcanization step must carefully avoid surface scratches. After selecting an extruder model appropriate to the tube’s size, the material is fed into the machine and extruded; this production process calls for a T‑die head.

2020

09-23

Common Faults of Twin-Screw Extruders

Common Malfunctions of Twin-Screw Extruders During operation, twin-screw extruders inevitably encounter issues. What are the most frequent problems? Unstable die pressure, failure to start the main motor, fluctuating main motor current, and low lubricating oil pressure. Below is a detailed overview: 1. Unstable Die Pressure Causes: Uneven speed of the main motor or the feeding motor, leading to fluctuations in feed rate. Solutions: Inspect the main motor’s control system and bearings; also check the feeding system’s motor and its control system. 2. Main Motor Fails to Start Causes: Incorrect startup sequence; issues with the main motor’s wiring; blown fuse. Solutions: Perform a thorough inspection.

2020

09-24

Application of Basic Equipment for Rubber Sealing Strips

Application of Basic Equipment for Rubber Sealing Strips During production, rubber sealing strips are typically extruded using a rubber extruder; hence, many people refer to it as a rubber strip extruder. Whether it’s a single‑extrusion sealing strip or a composite sealing strip, the extrusion process is carried out by a rubber extruder. To ensure optimal results, it’s essential to select the appropriate type and model of rubber extruder based on the size and structure of the sealing strip. For instance, when producing single‑extrusion sealing strips, the choice of extruder model should align with the product’s dimensions, ensuring that the extruder’s output range is suitable for the specific application. As for the operation of the rubber extruder…

2020

09-25

PE plastic pipe extrusion equipment

PE plastic pipe extrusion equipment: PE plastic pipes are a very common type of plastic pipe, and the conduit pipes we typically see are usually made of PE. When manufacturing PE plastic pipes, the raw materials must first be processed into plastic pellets according to the product formulation, and then extruded using an extruder to achieve the desired pipe shape. Generally, PE plastic pipes are rigid; their physical properties need to be carefully controlled by adjusting the formulation based on the specific product requirements. After blending multiple raw materials in a kneader according to the formulation ratio, the mixture can be fed into a pelletizing machine to produce plastic pellets. The raw materials pass through…

2020

09-26

The function of the cooling water tank in plastic product manufacturing

The Role of Cooling Tanks in Plastic Product Manufacturing We know that plastic extruders typically require cooling tanks to lower the temperature of products during production. So, what exactly is the function of these cooling tanks in the manufacturing process? In fact, when a plastic extruder produces plastic parts, it first heats and plastifies the raw material within the barrel. The extruder screw then subjects the material to various processing steps before it is forced through the die at the extruder’s head, where it takes its final shape. As the material exits the die under extrusion pressure, it assumes the desired product geometry. However, during this process, the shape of the extruded product can be unstable.

2020

09-27

Advantages of Pin-Type Extruders

Advantages of Pin‑Type Extruders Pin‑type rubber extruders are primarily used to manufacture high‑quality rubber products, such as rubber hoses and rubber cables, which are produced using this type of extruder. When selecting a pin‑type rubber extruder, it is essential to choose the appropriate model and equipment configuration based on the product’s size and physical properties. However, certain rubber products—such as rubber sealing strips—are not well suited for production with an extruder barrel equipped with pins. During operation, a pin‑type rubber extruder must first regulate the temperature…

2020

09-28

What key issues should be addressed when operating a rubber filter press?

What key issues should be addressed when using a rubber extruder? In the rubber‑production process, virtually every enterprise relies on a piece of equipment known as an extruder. However, there are several critical considerations that companies must keep in mind during operation. Failure to heed these points can shorten the equipment’s overall service life. Before use, the extruder must be preheated, as the material being processed needs to reach a softened state to ensure smooth operation. Only after reaching the required temperature can the extruder proceed with the extrusion process.

2020

09-29

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