PL97601B1 - SYNTHETIC CORE OR MOLDS - Google Patents
SYNTHETIC CORE OR MOLDS Download PDFInfo
- Publication number
- PL97601B1 PL97601B1 PL18042075A PL18042075A PL97601B1 PL 97601 B1 PL97601 B1 PL 97601B1 PL 18042075 A PL18042075 A PL 18042075A PL 18042075 A PL18042075 A PL 18042075A PL 97601 B1 PL97601 B1 PL 97601B1
- Authority
- PL
- Poland
- Prior art keywords
- weight
- amount
- water
- molds
- synthetic core
- Prior art date
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 239000002817 coal dust Substances 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 239000011230 binding agent Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
Przedmiotem wynalazku jest syntetyczna masa rdzeniowa lub formierska sporzadzona na osnowie piasku kwarcowego z dodatkiem bentonitu, wody, ewentualnie pylu weglowego oraz zawierajaca spoiwo organiczne. « Obecnie stosowane w odlewnictwie masy, znane na przyklad z publikacji ksiazkowych: L.Lewandowski - „Materialy formierskie" PWN, 1971, lub W. Sakwa, Wachelko- „Teoria i praktyka technologii, materialów formierskich" Wyd. „Slask" Katowice, 1970 — zawieraja w swoim skladzie jako spoiwo lug posiarczynowy, dekstryny, formamyl wzglednie inne substancje skrobiowe. Charakteryzuja sie one tym, ze w czasie zalewania form wydzielaja duze ilosci gazów, a wykonane odlewy sa trudne do oczyszczenia. Szczególnie dotyczy to wybijania rdzeni.Masa wedlug wynalazku sporzadzona jest na osnowie piasku kwarcowego w ilosci do 95,80% wagowych i zawiera w swym skladzie bentonit w ilosci 1,0—10,0% wagowych, pyl weglowy w ilosci 0,0^5,5% wagowych oraz spoiwo w postaci soli sodowej karboksylometylocelulozy w ilosci 0,2—3,5% wagowych, co stanowi lacznie 100% wagowych skladników sypkich, do których dodaje sie wode w ilosci 3,0—6,0% wagowych.Masa syntetyczna bedaca przedmiotem wynalazku i zawierajaca sól sodowa karboksymetylocelulozy w odniesieniu do opisanych mas w stanie techniki o podobnym zastosowaniu charakteryzuje sie: — zmniejszona wydzielalnoscia gazów podczas zalewania cieklym metalem, — podniesieniem wlasnosci wytrzymalosciowych witanie wilgotnym i w stanie wysuszonym (F^s) w masach rdzeniowych; — zwiekszona wytrzymaloscia na rozciaganie w strefie kondensacji przy jednostronnym napromieniowaniu (RBi); — zwiekszona podatnoscia masy podczas zalewania; — bardzo dobra wybijalnoscia rdzeni z odlewów.Masa wedlug wynalazku przeciwdziala wystepowaniu wad powierzchniowych odlewów na przyklad wady strupa, posiada lepsze wlasnosci technologiczne i bardzo dobra wybijalnosc, co wplywa na zmniejszenie pracochlonnosci wybijania i oczyszczania odlewów.2 97 601 Masy o zawartosci soli sodowej karboksylometylocelulozy w ilosci 0,2—1,0% wagowych z dodatkiem pylu weglowego, stosuje sie jako syntetyczna mase formierska, natomiast masa z wyzsza zawartoscia soli sodowej karboksylometylocelulozy w ilosci 1,0^3,5% wagowych przeznaczona jest do wykonywania rdzeni odlewniczych.Przyklad I— masa rdzeniowa piasek kwarcowy sól sodowa karboksylometylocelulozy bentonit woda Przyklad II— masa formierska - 95,5% wagowych - 1,5% wagowych - 3,0% wagowych - 5,0% wagowych piasek kwarcowy pyl weglowy bentonit sól sodowa karboksylometylocelulozy woda — 88,5% wagowych — 4,5% wagowych — 6Jb% wagowych — 0,5% wagowych — 4,5% wagowych Mase wedlug wynalazku przyrzadza sie przykladowo w nastepujacy sposób: do mieszarki dowolnego typu wprowadza sie skladniki suche i miesza w czasie okolo 2 minut, a nastepnie po dodaniu wody miesza sie przez dalsze 6-H5 minut. < PLThe subject of the invention is a synthetic core or molding sand based on quartz sand with the addition of bentonite, water, or coal dust, and containing an organic binder. «Masses currently used in foundry, known, for example, from book publications: L. Lewandowski -" Molding materials "PWN, 1971, or W. Sakwa, Wachelko-" Theory and practice of technology, molding materials "Ed. "Slask" Katowice, 1970 - they contain as a binder sulfite slime, dextrins, formamyl or other starchy substances. They are characterized by the fact that during pouring the molds they emit large amounts of gases, and the castings made are difficult to clean. The mass according to the invention is based on quartz sand in the amount of up to 95.80% by weight and contains bentonite in the amount of 1.0-10.0% by weight, coal dust in the amount of 0.0 ^ 5.5% by weight and the binder in the form of sodium carboxylmethylcellulose in the amount of 0.2-3.5% by weight, which is a total of 100% by weight of the powdery ingredients, to which water is added in the amount of 3.0-6.0% by weight. of the invention and containing sodium carboxymethylcellulose in relation to the masses described in the prior art with a similar application is characterized by: - reduced gas evolution during flooding with liquid metal, - increased property new greeting moist and dry (F ^ s) in core masses; - increased tensile strength in the condensation zone with one-sided irradiation (RBi); - increased mass susceptibility during pouring; - very good knockout properties of cast cores. The mass according to the invention counteracts the occurrence of surface defects in castings, for example scab defects, has better technological properties and very good knock-out properties, which reduces the laboriousness of knocking out and cleaning of castings. 2 97 601 Sands containing sodium carboxylate methylcellulose The amount of 0.2-1.0% by weight with the addition of coal dust is used as a synthetic molding sand, while the sand with a higher content of sodium carboxylmethylcellulose in the amount of 1.0 ^ 3.5% by weight is intended for making foundry cores. - core sand quartz sand sodium carboxylmethyl cellulose bentonite water Example II - molding sand - 95.5% by weight - 1.5% by weight - 3.0% by weight - 5.0% by weight quartz sand coal dust bentonite sodium carboxylmethyl cellulose water - 88 , 5% by weight - 4.5% by weight - 6% by weight - 0.5% by weight - 4.5% by weight The mass according to the invention is in the following way: the dry ingredients are introduced into any type of mixer and mixed for about 2 minutes, then mixed for a further 6-H5 minutes after adding water. <PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18042075A PL97601B1 (en) | 1975-05-15 | 1975-05-15 | SYNTHETIC CORE OR MOLDS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18042075A PL97601B1 (en) | 1975-05-15 | 1975-05-15 | SYNTHETIC CORE OR MOLDS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL97601B1 true PL97601B1 (en) | 1978-03-30 |
Family
ID=19972093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18042075A PL97601B1 (en) | 1975-05-15 | 1975-05-15 | SYNTHETIC CORE OR MOLDS |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL97601B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL449711A1 (en) * | 2024-09-05 | 2026-03-09 | Politechnika Wrocławska | Molding sand for producing casting molds |
-
1975
- 1975-05-15 PL PL18042075A patent/PL97601B1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL449711A1 (en) * | 2024-09-05 | 2026-03-09 | Politechnika Wrocławska | Molding sand for producing casting molds |
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