Ceramic casting sand for sand 3d printing Featured Image

Sintered yumbu yashi don kamun kifi tare da akwatin sanyi mai sanyi

Takaitaccen Bayani:

The cold box method refers to a resin sand forming process that is catalyzed/hardened by blowing in gas or aerosol, and formed instantaneously at room temperature. The common method is the triethylamine method, which uses phenolic-urethane resin and is hardened by blowing triethylamine gas. The characteristics of this process are: the core sand can be used for a long time, the mold-drawing time is short, the production efficiency is high, and the energy consumption is low.

Aika mana imel

Cikakken Bayani

Tags samfurin

Diesel engine castings, such as cylinder blocks, cylinder heads, intake and exhaust pipes, etc., some have complex core shapes and small partial cross-sectional areas, which are prone to false shots, fractures, etc., or veins appear in the castings due to the large expansion of silica sand. The probability of defects such as sticky sand and pores is also relatively high.

Sintered-ceramic-sand-for-foundry-with-cold-core-box-(4)

Sintered-ceramic-sand-for-foundry-with-cold-core-box-(5)

Using ceramic sand or mixing ceramic sand and silica sand in proportion, the amount of resin added is reduced by 20-30%, and the above defects have been significantly improved. At the same time, the sand core has good collapsibility, which reduces the workload of casting cleaning. As a result, more and more diesel engine casting foundries have adopted ceramic sand cold core box technology.

Abubuwan Yashi na yumbu

Babban Abun Sinadari	Al₂O₃≥53%, Fe₂O₃＜4%, TiO₂＜3%, SiO₂≤37%
Siffar hatsi	Siffar
Angular Coefficient	≤1.1
Girman Juzu'i	45μm -2000μm
Refractoriness	≥1800℃
Yawan yawa	1.5-1.6 g/cm3
Thermal Fadada (RT-1200℃)	4.5-6.5x10-6/k
Launi	Yashi
PH	6.6-7.3
Ma'adinan Ma'adinai	Soft + Corundum
Farashin Acid	＜1 ml/50g
LOI	0.1%

Compare with other raw sand test result of Cold box process

Raw Sand	Resin Add.	2h Tensile Strength	Gas Evolution
Sintered Ceramic Sand	1.5%	2.098 MPa	10.34 ml/g
Scrubbed Sand	1.5%	1.105MPa	13.4 ml/g
Baked Sand	1.5%	1.088 MPa	12.9 ml/g
Sintered Ceramic Sand+ Scrubbed Sand	1.5%	1.815 MPa	12.5 ml/g
Sintered Ceramic Sand+ Baked Sand	1.5%	1.851 MPa	12.35 ml/g
Chromite Sand+ Scrubbed Sand	1.5%	0.801 MPa	10.85 ml/g
Chromite Sand+ Baked Sand	1.5%	0.821 MPa	10.74 ml/g

Compare with Castings defects rate of Cold box process

Raw Sand	Veins	Core Broken	Sinter	Choke	Total
Sintered Ceramic Sand	0%	2%	0%	0	2%
Scrubbed Sand	28%	12%	4%	3%	47%
Baked Sand	24%	10%	3%	2%	39%
Sintered Ceramic Sand+ Scrubbed Sand	12%	4%	1%	2%	19%
Sintered Ceramic Sand+ Baked Sand	7%	3%	2%	2%	14%
Chromite Sand+ Scrubbed Sand	13%	6%	5%	4%	28%
Chromite Sand+ Baked Sand	12%	4%	2%	2%	20%

Sassan Rarraba Girman Barbashi

Za'a iya daidaita girman girman barbashi bisa ga buƙatun ku.

raga		20	30	40	50	70	100	140	200	270	Pan	Farashin AFS
μm		850	600	425	300	212	150	106	75	53	Pan
Lambar	40/70		≤5	20-30	40-50	15-25	≤8	≤1				43±3
	70/40		≤5	15-25	40-50	20-30	≤10	≤2				46±3
	50/100			≤5	25-35	35-50	15-25	≤6	≤1			50±3
	100/50			≤5	15-25	35-50	25-35	≤10	≤1			55±3
	70/140				≤5	25-35	35-50	8-15	≤5	≤1		65±4
	140/70				≤5	15-35	35-50	20-25	≤8	≤2		70±5
	100/200					≤10	20-35	35-50	15-20	≤10	≤2	110±5

sand sintering

sintered sand

Idan kuna sha'awar samfuranmu, zaku iya zaɓar barin bayanin ku anan, kuma za mu tuntube ku nan ba da jimawa ba.

Rukunin samfuran