겉보기 밀도-스콧 볼륨 메타 (SD-100)
(Bulk Density Tester-Scott Volumeter)
◆ 개요(Description)
▶ 자유 낙하를 흐름을 통한 겉보기 밀도-체적 시험 방법 (Scott Volumeter)
▶ Scott volume meter method to determine the loose density of metal powder
▶ 제약-화장품 분말, 금속 파우더, 페인트 안료 분말 등
(Paint and pigment, pharmaceutical and metal powder etc)
▶ 제품 구성
● 깔때기 및 망사 채(mesh)
● 깔때기 및 5mm망사 채
● 유리 판이 장착된 패스 박스
● 25cc 스테인리스 분말 Cup
▶ 컵의 체적 기준으로 분말 중량을 나누어 ㎖/g당 벌크(bulk) 밀도를 재 계산
▶ 무게 측정은 0.1g 이상의 정밀도를 가져야 함
▶ 규정: ASTM B 329, ASTM B 873, ISO 3923 - 2, EP and USP Chapter 616 II█ Feature:
1. Stainless Steep top funnel: it is composed by two pcs Stainless Steel Conical funnel, separate by the cylinder,
inside with the opening size 1.18mm Stainless Steel sieve;
2. Clothing box: cross section is square shape, there are 4 pcs 1 mm thick Stainless steel board slide on the Aluminium frame inside;
Inside and outside frame, there is Plexiglas plate, Stainless steel board can take off, it is easy to clean and wash
3. Square shape funnel: it is welded by 1mm Stainless Steel board, angle is 60° square conical shape, upper dia. is 12.5mm×12.5mm;
4. Cylindrical receiving cup: volume is 25ml, Stainless steel, net weight is 46±1g;
5. Steel frame: it holds upper assembly funnel, clothing box, square funnel, cylindrical receiving cup;
6. Balance: it weights powder sample, maximum capacity is 1kg, accuracy is 0.02g (optional parts)
█ Sampling instructions:
1. When determining the bulk density of each metal powder, a sample of at least 100cm3 volume should be taken and divided into three parts;
2. Usually, the metal powder is measured according to the receiving state. In some cases, the metal powder should be dried.
But if the powder is easy to oxidize, it should be dried under the protection of vacuum or inert atmosphere.
If the metal powder contains volatile substances, drying is not allowed.
█ Measurement operation:
1. Use a spoon to carefully put the metal powder on the screen of the upper combined funnel, pass through the cloth box and square funnel,
and flow into the cylindrical cup. Until it is full and there is powder overflow;
2. If the powder cannot pass through the screen freely, use a soft brush to brush the metal powder through the screen.
If it is invalid, the metal powder will not be used to determine the bulk density by the Scout volumetric method;
3. After the powder overflows from the cylindrical cup, scrape it with a stainless steel ruler.
But do not compress or bring out the powder in the cup, let alone shake or vibrate the cup;
4. After the scraper, tap the cup lightly to make the powder sink to avoid scattering the powder during the shaking process,
and there should be no powder on the outer surface of the cup;
5. Weigh the metal powder in the cylindrical cup to the nearest 0.05g;
The ratio of the mass of the metal powder to the volume is the bulk density, and the calculation formula is as follows:
In the formula: ρas ------The bulk density of metal powder measured by Skoket volumetric method, g/cm3;
m------the mass of metal powder, g;
v-------Volume of loose metal powder, cm3;