NAKAYAMACo.,Ltd.
Apparatus for green sand quality control

Molds made by today’s molding machines have high compression strength exceeding
2kg/cm2 (50φ×50H TP) , and hence certain countermeasures are necessary to prevent
casting defects caused by gas formed by combustion of organic materials in shell moldcores and other mold parts. Compactability test is a useful tool for quality control ofmulled sand with appropriate density and fluidity for the above purpose.
This is for measuring compactability of molding sand, consisting of an air pressure type tester and a sample holder. Compactability test is a quantitative replacement of a qualitativeevaluation of molding sand by the feel of a palm when squeezing sand. Amount of moisture and clay in sand as well as oolitic
content and degree of mulling can be evaluated by this test.
The test is simple to perform and useful for quick determination of sand quality in laboratory and on production floor.
Compactability TesterType

NC-CBT-1

Height

680mm

Floor area

330 x 230 mm2

Weight

40kg

Compression typeair compression

Nominal compression force

10kg

Read method

memorySample processor
Height

380mm

Floor area

210 x 210 mmSieve diameter

150 mmφ

Mesh size

6 mesh[Attachment] Sample holder: 1 piece
Tester base:Push rod:

NAKAYAMACo.,Ltd.
■ Haed Office
3-37-22 Kodama, Nishi-ku, Nagoya-City 451-0066 Japan
Tel:+81-52-521-1171 Fax:+81-52-521-1180
E-mail: info@nakayama-meps.co.jp

1 piece1 pieceFebruary, 2012 2nd edition
May, 2016 3rd edition■ Website; http://www.nakayama-meps.co.jp/■ Eastern Japan business officeTel: +81-24-545-6588
Fax: +81-24-544-6588

コメントその他

otherShould test
砂の老化度テスト必要あり
thesand's antiquation

pour.temperature
鋳込温度

improvinghighercoarse sand careful pouringmulling method pour.temperature /more new sand/faster pour.rate /check the material○

displacedsand/scabbing

○

core

dross/inclusion

せき口の形断面積
gatearea

○

○

pin
hole

○

○

mis-run/coldshot○

gas/blow

中子の崩壊性core
collapsibility

溶湯の酸化防止minimizemelt oxidation

鋳込方案の改善gate
design

シ
ェル
中子
Shell
core
or…
又は有機
自硬
性 中 子 core
Organic
self
hardening

混練時間
mulling
timeloss
強 熱on
減 ignition
量grain
粒 度 size

all 粘clay
全土 fraction
分

combustible
可燃性物質

grainsize
粒度指数 indexgas
ガ スproduction
発生率moisture
水分surfacestability index
表面安定度compactability
コンパクタビリティ値

hardness
鋳型硬度

green
湿態 強strength
度 ( 鋳 型(strength)強度)

permeability
鋳型通気度

mold property

defect typeveining

faster pouring○

hot deformability hot deformability

buckling

Casting Quality Improvement Guide in Relation to Mold Properties

comment○○○

hot tearsandburning○

penetration

sandsticking
dropped sandshrinkage/broken moldsieve face sand use wetting agent rigid flask/remove block sand /increase separator /gas vent/change separator /machine adjust/coating/wetting agent○

roughsurface○○

coat does not coat does not inferior gating
match.
match.
design/pouring/pouring/around down
temperature is temperature is gate rammer's
too high.
too high.
inferior makethe molten
enters equally.

○

penetration sand inclusion insert metal

decreasing the property value.

Lack ofLack ofMolding Sand
refractoriness refractorinessis weakburn fusion

increasing the property value.

FinCarburizing
Sulphurizing○ read through it