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Construction of the Pöhl dam in 1958 made it necessary to relocate. Nearby Jocketa was selected deliberately because many of the employees from Pöhl also moved there. The Lehmann family also wanted to remain in the heart of the Vogtland region.
In 1972, the new generation of the family entered the business with Thilo Lehmann. Shortly after that, "VEB Carl Zeiss" took a share in the company as a partner, resulting in partial nationalisation. In 1975, Heinz Lehmann was accused of preferring West Germany companies, and imprisoned for 9 months. Gradually, all the "Lehmanns" were prised out of the company. Only in 1977 was the founder of the company completely rehabilitated.
In the course of the reunification of Germany, Heinz and Thilo Lehmann were then able to reprivatize the company on 16 June 1990.
At the end of the 1990s, Markus and Titus Lehmann joined the company as the 3rd generation of the family to join the metal-processing industry. Markus Lehmann became the head of production in his family's company, Titus Lehmann founded his own company and began to manufacture and sell stainless steel grilles.
Over the course of the years, Titus Lehmann developed his company's portfolio - Lehmann-UMT GmbH - on a continuous basis, first by adding activities in sheet metal processing, followed by filter and conveyor technology products. Additional aspects of the company profile today include engineering, 3-D design and special machine construction.
The change to the Renewable Energies Act (EEG) in 2014 caused Thilo Lehmann's Lehmann Maschinenbau GmbH serious financial problems. Consequently, Titus Lehmann decided to buy the production facility in Jocketa, meaning that environmental technology also supplemented the product range of Lehmann-UMT.
Since the end of 2014, the company has been operated with a streamlined structure and the 80 employees from two plants have grown together into a strong team.
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Twin-screw extruder can be divided into many types according to the direction of rotation and structure of the screw, including parallel co-rotation and close meshing co-rotation and so on. Parallel co-rotating twin-screw extruder produces uniform shear effect in the contact area and barrel, and the strength of this shear effect can be adjusted by means of screw combination, pitch design and so on.
Twin-screw extruder consists of several parts such as transmission device, charging device, barrel and screw. Its structure is characterized by two parallel screws placed in the “∞” cross-section of the barrel, usually tightly meshed and anisotropic rotation, in a few cases also use the same direction of rotation of the twin-screw extruder, generally operated at lower screw speeds.1. The screw system of the twin-screw extruder is mainly used to complete the plasticizing and conveying process, including the feeding system, external heating system, cooling system, hydraulic screen changer system, vacuum system, and the material. The screw system of the twin-screw extruder mainly accomplishes the plasticizing and conveying process of the material, including the feeding system, external heating system, cooling system, hydraulic screen changer system, vacuum system, and electronic control system.
Twin-screw extruder is widely used in the molding and processing of extruded products, especially in glass fiber reinforcement, fuel retardant pelletizing and other outstanding performance. In addition, it is also used for filling, blending, modifying, reinforcing, de-volatilization of chlorinated polypropylene and highly absorbent resins of rubber, plastic and engineering resins; extrusion of degradable masterbatch, polyamide polycondensation, polyurethane polycondensation reaction; pelletizing of carbon and magnetic powders; and preparation of insulating materials, sheathing materials, low-smoke, low-halogen flame-retardant PVC cable materials for cables, as well as various kinds of silane cross-linking materials.
- KTE-16/20/25D Lab Twin Screw Extruder - B series:High torque series(T/A3=6-8),D series:High torque and high speed series(T/A3=8-12...
- KTE-T Co-rotating Triple Screw Extruder - B series:High torque series(T/A3=6-8),D series:High torque and high speed series(T/A3=8-...
- KTE Parallel Co-Rotating Twin Screw Extruder - B series:High torque series(T/A3=6-8),D series:High torque and High speed series(T/...
- SE/KTE Two-stage Compounding Extrusion Line - The SE/KTE Series two-stage extruder system is primarily designed for waste plastics...
- KTE/SE Two-stage Compounding Extrusion Line - The first stage consists of a KTE-series high-speed co-rotating twin-screw compounde...
ystral is a fast growing, owner-managed company in the mechanical and plant engineering industry. We focus on the construction of individualised mixing machines, dispersing machines and powder wetting machines as well as special mixing plants, dispersing plants and powder wetting plants for liquid mechanical process engineering. In addition, our process technologies also include emulsifying and homogenizing.
Our headquarter is located in Ballrechten-Dottingen, Germany. We are a medium-sized company with over 270 employees and subsidiaries in China, India and Singapore as well as numerous representatives worldwide. We constantly develop the know-how of our employees as well as our technologies in line with your requirements and thus meet our own high standards: ystral - 110% MIXING SOLUTIONS.
Whether for the production of chemical products, the food industry, cosmetics, pharmaceuticals or coatings and inks. With ystral machines and plants you minimize your process times, reduce the use of raw materials and often also improve the quality of your products.
With our extensive knowledge and many years of experience in process and application technology, we develop specific, customer-oriented solutions for you across all industries. Together with you, we develop implementations for your individual applications that provide you with immediately achievable and quantifiable added value. We will accompany you through all process steps with our drive and full commitment.
Twin screw extruder BTS
The twin screw extruder is used for direct processing of the polymer without energy-intensive pre-drying or special processes
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Atiye Sazan Negin Faraz Company was established in 2000 under the brand name of L.Lion.
This company has 20 years of experience in the field of manufacturing machines, designing machinery, producing parts, plus enjoys proficient and educated personnel in the field of design, installation, execution, commissioning, part manufacturing, machine construction, and industrial consultation, as well as modern and efficient equipment and facilities in three separate units. This company is going to be one of the most modern industrial factories to design, manufacture, install, and commission equipment, machinery, and production lines pertaining to feed for livestock, poultry, and aquatic animals using extrusion technology in 2011. Besides, this company has a pet feed production line as well as soy protein for human consumption. This company hopes to supply a part of the country’s requirements in this regard. From the first day of its activity up to the present time, this company has installed and exploited 25 factories including production line for livestock, poultry, aquatic animals, and pet feed, plus soy protein for human consumption, full-fat soy, and flicker with a production capacity of 250 kg per hour up to 20 tons per hour. Besides, exported its equipment to countries such as Kuwait, Afghanistan, Armenia, Iraq, Pakistan, and Turkey and commissioned production lines in these countries.
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