Flow Process of SIR 20 at Unit Pematang Kiwah

Summary

This video outlines the comprehensive production process at PTPN 7 Rejosari Unit, focusing on the handling, processing, and quality control of rubber. The process includes the weighing and sorting of Bokar, the grinding and drying of rubber samples, as well as strict contamination checks. It highlights various stages such as gilling, shredding, drying, and packaging, ensuring compliance with industry standards (SNI 1903.2 2017). The video emphasizes efficient techniques for rubber quality maintenance, from the initial unloading to final packaging, ensuring consistency and quality in each bale produced.

Takeaways

• 😀 The process begins with weighing the truck before unloading to determine the initial weight before stripping.
• 😀 Stripping process takes at least 20 minutes, followed by a second weighing to determine the initial gross weight.
• 😀 The material is checked for contamination and sorted during unloading to ensure the composition is within standard limits.
• 😀 The contamination limit for coagulant Bokar is 5%, with the sample being free of vulcanized rubber.
• 😀 Sample grinding is done 12 times with a maximum thickness of 2mm using a crab machine.
• 😀 The dried sample undergoes a weight measurement to determine the dry content using a specified formula.
• 😀 During the wet processing station, the material undergoes several stages of milling to reduce contamination and ensure size uniformity.
• 😀 A series of rollers are used to thin and shape the material into crepe sheets with varying thicknesses, down to 0.1-0.2mm.
• 😀 Crepe sheets are dried in a specific temperature range (118-130°C) for 7-8 minutes to reduce moisture content.
• 😀 After drying, the material is pressed into bales, checked for contamination, and then packaged in plastic for final distribution.

Q & A

What is the purpose of the initial truck weighing in the production process?

The initial truck weighing, known as the 'timbang awal,' is used to determine the weight of the cargo before unloading, ensuring accurate tracking of the incoming material.

How long must the drying process for the material (referred to as penirisan) last?

The drying process, or penirisan, must last at least 20 minutes before the material is weighed again to determine its initial gross weight.

What does the sorting process in the rubber processing station involve?

The sorting process involves checking for contamination in the sample material, such as ensuring that the Bokar (rubber) has no more than 5% contamination and is free of vulcanized rubber.

What happens to the rubber sample after it is ground?

After the rubber sample is ground, it is weighed to determine its dry rubber content using a specific formula. The grinding process involves multiple stages, including reducing the thickness of the material to specific measurements.

What is the purpose of using the Hammer Mill in the processing station?

The Hammer Mill is used to reduce the size of rubber crumbs, facilitating the removal of contaminants and preparing the material for further processing.

What is the function of the reaper machines in the production line?

The reaper machines are used to thin and shape the rubber sheets, progressively reducing their thickness to desired specifications as they pass through different rollers.

How is the moisture content of the rubber sheets controlled?

The rubber sheets are dried for at least 12 days, with specific conditions on the distance between the sheets and the floor to ensure proper air circulation and moisture reduction.

What does the 'bel' sorting process check for?

The 'bel' sorting process checks the bales of rubber for contamination such as white spots, foreign rubber, and black sparks, ensuring the quality of the final product.

How are the bales of rubber packaged after processing?

The rubber bales are packaged by sealing them in plastic wrap and labeling them with necessary information such as lot numbers. The bales are then placed in farming boxes with specific arrangements.

What are the key specifications for drying the rubber in the drier?

The rubber is dried in the drier at a temperature range of 118-130°C for a cycle of 7-8 minutes, and after drying, the bales are cooled to a temperature of 40°C before being weighed and pressed.