PL93480B2 - - Google Patents
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- Publication number
- PL93480B2 PL93480B2 PL182504A PL18250475A PL93480B2 PL 93480 B2 PL93480 B2 PL 93480B2 PL 182504 A PL182504 A PL 182504A PL 18250475 A PL18250475 A PL 18250475A PL 93480 B2 PL93480 B2 PL 93480B2
- Authority
- PL
- Poland
- Prior art keywords
- binders
- molds
- granular material
- casting
- molding
- Prior art date
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- 239000011230 binding agent Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims 1
- 238000006062 fragmentation reaction Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000737052 Naso hexacanthus Species 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Description
Przedmiotem wynalazku jest masa formierska, znajdujaca zastosowanie w przemysle odlewniczym do wykonywania form na odlewy metalowe.Znane dotychczas masy formierskie wykonuje sie z ziarnistego materialu ogniotrwalego, do którego wpro¬ wadza sie spoiwa lub lepiszcza oraz dodatki uszlachetniajace, wplywajace na poprawe ich wlasciwosci w procesie formowania, jak i na poprawe jakosci otrzymanych odlewów. Jako ziarnisty material ogniotrwaly stosowany jest najczesciej piasek kwarcowy, piasek oliwinowy, cyrkonowy lub tez kruszywa uzyskane z chromomagnezytu, palonki wysokoglinowej, magnezytowej itp. Materialy te charakteryzuja sie stosunkowo duza gestoscia oraz duzym wspólczynnikiem przewodnictwa cieplenego, co w konsekwencji prowadzi do tego, ze formy odlewnicze, wykonane na bazie tych materialów, odznaczaja sie duzym wspólczynnikiem akumulacji ciepla, co przyczynia sie do krótkiego czasu krzepniecia odlewów.W niektórych zastosowaniach odlewniczych dazy sie do tego, by pewna czesc odlewu, jak np. górna czesc odlewu otwartego lub nadlewy, wykazywala dwu- lub wiecej -krotnych czas krzepniecia metalu w porównaniu z pozostala czescia odlewu.Celem wynalazku jest uzyskanie masy formierskiej, z której wykonane formy wykazywalyby maly wspólczynnik akumulacji ciepla.Cel ten osiaga sie przez zastosowanie jako ziarnistego materialu ogniotrwalego kruszywa, uzyskanego z rozdrobnienia zdiagenezowanej skaly diatomitowej i/lub menilitowej. Skala ta charakteryzuje sie mala gestoscia pozorna, wynoszaca okolo 1,1 g/cm3, a tym samym posiada maly wspólczynnik przewodnictwa cieplnego. Przy tak niskiej gestosci pozornej posiada jednak dostateczna wytrzymalosc mechaniczna do sporzadzania form odlewniczych.Ziarnisty material ogniotrwaly, bedacy przedmiotem wynalazku wiazany jest róznymi znanymi lepiszcza¬ mi lub spoiwami organicznymi i/lub nieorganicznymi. Do mas formierskich na bazie tego materialu ziarnistego wprowadza sie równiez znane dodatki uszlachetniajace.W zaleznosci od wymaganej przepuszczalnosci form stosuje sie przedmiotowy material ziarnisty o róznej granulacji.2 93 480 Przyklad. Masa formierska zawiera w procentach ciezarowych: Granulet zdiagenizowanej skalydiatomitowej, C frakcja 0,2-1,2mm - 85% Bentonit -10% Pylweglowy - 5% Do mieszaniny suchych skladników dodaje sie wode w ilosci niezbednej do uzyskania konsystencji ro¬ boczej. PLThe subject of the invention is molding sand, used in the foundry industry to make molds for metal castings. Known molding sand is made of granular refractory material, into which binders or binders and enriching additives are introduced, which improve their properties in the molding process. as well as improving the quality of the received castings. Quartz sand, olivine sand, zircon sand or aggregates obtained from chromomagnesite, high-aluminum, magnesite, etc. are most often used as granular refractory material. These materials are characterized by a relatively high density and a high coefficient of thermal conductivity, which in turn leads to the fact that the casting molds based on these materials have a high heat accumulation factor, which contributes to a short solidification time of the castings. In some casting applications, it is sought to ensure that a certain part of the casting, such as the upper part of an open casting or risers, has or more times the solidification time of the metal compared to the rest of the casting. The aim of the invention is to obtain a molding sand from which the molds made would have a low heat accumulation coefficient. This goal is achieved by using aggregate obtained from disintegration of the deagenized material as a granular refractory material. diatomite and / or menilite kala. This scale is characterized by a low apparent density, about 1.1 g / cm3, and thus has a low coefficient of thermal conductivity. However, at such a low apparent density, it has sufficient mechanical strength for the production of foundry molds. The refractory granular material, which is the subject of the invention, is bound with various known organic and / or inorganic binders or binders. Known additives are also introduced into molding sands based on this granular material. Depending on the required permeability of the molds, the granular material of different granulation is used. 2 93 480 Example. The molding mass contains in percentage by weight: Diagenized scale granule, C fraction 0.2-1.2 mm - 85% Bentonite -10% Dust - 5% Water is added to the mixture of dry ingredients in an amount necessary to obtain a working consistency. PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL182504A PL93480B2 (en) | 1975-08-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL182504A PL93480B2 (en) | 1975-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL93480B1 PL93480B1 (en) | 1977-05-30 |
| PL93480B2 true PL93480B2 (en) | 1977-05-31 |
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