SU908480A1 - Method of determining core to heated equipment adhesion force - Google Patents
Method of determining core to heated equipment adhesion force Download PDFInfo
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- SU908480A1 SU908480A1 SU802934446A SU2934446A SU908480A1 SU 908480 A1 SU908480 A1 SU 908480A1 SU 802934446 A SU802934446 A SU 802934446A SU 2934446 A SU2934446 A SU 2934446A SU 908480 A1 SU908480 A1 SU 908480A1
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- SU
- USSR - Soviet Union
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- snap
- mixture
- rod
- force
- adhesion
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
II
Изобретение относитс к литейному производству, в частности к технопогаи иаготовпени питейных форм и стержней.FIELD OF THE INVENTION The invention relates to foundry production, in particular, to technology and production of drinking-water molds and rods.
Известен способ определени прилипаемости формовочных смесей к модели, основанный йа определении усили отрыва образца смеси от поверхности модели. Способ предназначен дл определени усили отрыва образца смеси от поверхности модели с целью измерени величины прилипаемости смеси к поверхности модели DL .There is a known method for determining the adhesion of the molding mixtures to a model, based on the determination of the effort of separation of a sample of a mixture from the surface of a model. The method is designed to determine the force of separation of the sample mixture from the surface of the model in order to measure the value of the adhesion of the mixture to the surface of the model DL.
Недостаток данного способа - отсут ствие нагрева образца, что делает невозможным применение способа Дл ctvieсей , отверждаемых в оснастке, Кроме того, указанный способ позвол ет определить только пршшпаемость смесей к оснастке в холодном состо нии.The disadvantage of this method is the lack of heating of the sample, which makes it impossible to apply the method for ctviesey cured in a snap. In addition, this method allows only to determine the permeability of the mixtures to the snap in a cold state.
Наиболее близок к предлагаемому по достигаемому эффекту способ определени усили сцеплени сп ерж с нагреваемой оснасткой, включающий запопн ние оснастки стержневой смесью, нагревClosest to the proposed effect on the achievable method for determining the force of adhesion of springs with a heated snap-in, which includes snapping a snap with a core mixture, heating
и извлечение стержн . Способ позвол ет определить,усилие сдвига образца в ненагревйемой оснастке и хюлучить суммарное значение усшш сдвига, еключаюшее усилие трени нормального давлени смеси на оснастку и возникающее при уплотнении образца, а также усилие прилнпаемости а} .and removing the rod. The method makes it possible to determine the shear force of the sample in a non-heated tooling and to hyludite the total value of the shear volume, which is the force of friction of the normal pressure of the mixture on the tooling and resulting from compaction of the sample, as well as the force of penetration a}.
Недостаток известного способа - отсутствие возможности определени усили сцеплени стер(жней с нагреваемой оснасткой.The disadvantage of this method is the inability to determine the force of adhesion of sterol (heated with a snap).
Цель изобретени - уменьщение действи термических напр жёйий в стержне в процессе заполнени оснастки смесью.The purpose of the invention is to reduce the effect of thermal stresses in the rod during the process of filling the equipment with the mixture.
Поставленна цель достигаетс тем, что в способе дл определени усили сцеплени стержн с нагреваемой оснаст кой , включающем заполнение оснастки стержневой смесью, нагрев и извлечение стержн , в оснастку перед заполнением смесью устанавливают клиновой вкладыш, который удал51ют перед извлечением готового стержн .The goal is achieved in that in the method for determining the force of adhesion of the rod to the heated equipment, including filling the equipment with a rod mixture, heating and removing the rod, a wedge liner is installed into the equipment before filling with the mixture, which is removed before removing the finished rod.
На фиг. 1 сх.ематично изображен образец с клином| на фиг. 2 -то же, без клина.FIG. 1 cc. A sample with a wedge | in fig. 2 is the same, without a wedge.
На чертежах показаны кпиновыи вкладыш 1, стержень 2 и стержневой $пцик 3The drawings show the liner 1, the rod 2 and the rod $ pin 3
rt р и м е р . В лаборатории предпри ти создано устройство дл опробовани предлагаемого способа. С использованием устройстйа определено усилие сцеплени стержн образца, изготовленного из смеси с фе опспиртом при различном 1 емени отверждени .rt p and m. A device for testing the proposed method was created in the laboratory of the enterprise. With the use of a device, the adhesion force of a sample rod made from a mixture with photo alcohol with a different cure amount was determined.
Устройство представл ет собой нагреваемую кассету, в которую вставлена оснастка, представл юща собой втулку из чугуна с внутренней цилиндрической поверхностью. Чистота обработки поверхности (а.0г63. Клинова вставка выполнена из стали с формовочным уклоном 2°. Диаметр цилиндрической поверхкости оснастки 25 мм, высота 25 мм. Высота вставки 25 мм, ширина 24,8 мм Перед заполнением оснастки смесью, в нее устанавливаетс вставка. С целью исключени переносов вставкиво врем j заполнени оснастки смесью в ней выполнено резиновое уплотнение, в которое продета проволочна т га. Во врем -поджима оснастки к пескодувной насадке вставка при помощи т ги пргс симаетс к резиновому уплотнению насадки и вста&ка фиксируетс в вертикальном положении . Стержнева смесь из насадки пескодувной мащины под давлением 0,5 МПа задуваетс в оснастку. Оснастка огускаетс , выходит из контакта с насадкой. Клинова вставка при помощи проволочной т ги вытаскиваетс из стержневой смеси, заполнившей оснастку. На месте вставки остаетс щель, котора вл етс зазором между двум част ми стержневой смеси. Смесь под действием тепла отверждаетс при этом из пластического в упругое состо ние и расшир етс . Поскольку расширение происходит во все стороны, то смесь, упира сь в оснастку, деформируетс в сторону зазора метсду ей двум част ми . Зазор полностью компенсирует термическое расширение смеси, не позвол возникнуть в смеси термическим кщтр жени м . от затрудненной деформации.The device is a heated cassette in which the tooling is inserted, which is a cast iron hub with an internal cylindrical surface. Surface finish (a.0g63. Klinov insert is made of steel with a molding gradient of 2 °. The diameter of the cylindrical surface of the snap-in is 25 mm, the height is 25 mm. The height of the insert is 25 mm, width is 24.8 mm) An insert is installed into the equipment. In order to avoid insertions at the time of filling the equipment with the mixture, a rubber seal was made in it, during which the wire was pulled through. During the pressing of the equipment to the sandblasting nozzle, the insert was pressed to the rubber seal of the nozzle and insert rotated from the nozzle of a sandblasting machine under a pressure of 0.5 MPa is blown into the tooling. The equipment is exposed and comes out of contact with the nozzle. The wedge is pulled out of the core mixture that fills the equipment with a wire rod. which is the gap between the two parts of the core mixture.The mixture, under the influence of heat, hardens from plastic to elastic and expands. Since the expansion occurs in all directions, the mixture, resting on the tooling, is deformed towards the gap by two parts. The gap completely compensates for the thermal expansion of the mixture, preventing the formation of a thermal barrier in the mixture. from hampered deformation.
Из таблицы видно, что усилие сцеплени образца с нагреваемой оснасткой составл ет ЗО-40% от общего усили взаимодействи и не измен етс от времени отверждени .From the table it can be seen that the adhesion force of the sample with the heated equipment is 30% of the total interaction force and does not vary with the curing time.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802934446A SU908480A1 (en) | 1980-06-04 | 1980-06-04 | Method of determining core to heated equipment adhesion force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802934446A SU908480A1 (en) | 1980-06-04 | 1980-06-04 | Method of determining core to heated equipment adhesion force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU908480A1 true SU908480A1 (en) | 1982-02-28 |
Family
ID=20899644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU802934446A SU908480A1 (en) | 1980-06-04 | 1980-06-04 | Method of determining core to heated equipment adhesion force |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU908480A1 (en) |
-
1980
- 1980-06-04 SU SU802934446A patent/SU908480A1/en active
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