Unit V Metal Casting. Moulding Processes.

Vocabulary

1. casting - литье, отливка

2. sand - песок, формовочная глина

3. foundry - литейная (цех), литье

4. to melt - плавить

5. furnace - печь

6. mold - литейная форма, изложница

7. refractory - огнеупорный

8 heat - resisting - теплостойкий

¹ Arc gripped mecharically- механически крепко держатся

in the form of rollers- в форме роликов

9. plaster - гипс, алебастр

10. to pour -лить, заливать

11. die casting - литье под давлением

12. . to furnish - заполнять, загружать

13. . centrifugal casting - центробежное литье А capacity - мощность

15. . to forge - ковать

16. . pipe - трубка

17. . sleeve - втулка, патрубок

18. . housing - корпус, коробка

19. . to spin - вращать, вертеть

20. . precision casting - точное литье

21. . cavity - полость, выемка

22. . shell casting - литье в оболочковые формы

Exersisc1. Translate into Russian the following nouns formed with the help of a suffix -ing.

Example: to melt - плавить; melting - плавление

to produce - producing to pour - pouring to cast - casting to make- making to coat - coating to mount - mounting

Exercise 2. Make nouns using the suffix- tion and translate them into Russian:

to eject to introduce

to produce to apply

to transform to operate

Exercise 3. Translate into Russian without using a dictionary:

process, industry, metal, method, materials, to classify; type, temperature, transformation

Exercise 4. Choose the correct Russian equivalents to the English terms:

1. metal-working industry а) литейная

2. metal casting б) плавление металлов

3. sand casting в) литье металлов

4. foundry г) литье в песчаные формы

5. metal melting д) теплостойкий материал

6. heat - resisting material с) металлообрабатывающая промышленность

7. ceramic material ф) керамический материал

Exercise 5. Choose the correct English equivalents to the Russian terms:

а)передавать 1. mold

б)изложница 2. to pour

в)залипать 3. melting temperature

г) температура плавления 4. liquid metal

д)технологические методы 5. to transmit

е)жидкий металл 6. die casting

ж)литье под давлением 7. technological methods

Exercise 6. Define parts of speech and translate into Russian:

to develop, primarily, a furnace, suitable, to solidify, a shape, operation, slowly, technological, to introduce, to determine

Exercise 7. Find in the text nouns for the following verbs:

To produce to pour

To make to know

To melt to develop

Exercise 8. Find in the text verbs for the following nouns:

application, development

Exercise 9. Translate the words of the same root:

to produce- product- production industry- industrial- industrialization to operate- operator- operation

Exercise 10. Give synonyms:

age, to produce, shape, to apply.

Exercise 11. Give antonyms:

to solidify, slowly, present, suitable

Exercise 12. Translate the following words and word combinations and use them in the sentences of your own:

foundry industry, die casting, furnace, mold, melting temperature

Text A

One of the basic processes of the-metal- working industry is the production of metal-' castings. Numerous methods have been developed through the ages for producing metal castings, but the oldest method is that of making sand castings in the foundry. Primarily, work consists of melting metal in a furnace and pouring it into suitable sand molds, where it solidifies and assumes the shape of the mold.

Metal - casting methods may be classified into three groups, depending upon the type of mold used and the manner in which the molten metal is introduced into the mold.

The mold may be made from a refractory or heat-resisting material, such as sand, some suitable ceramic material, or plaster, which is expendable, i. е., the molds are used only once. The kind of material chosen to make the mold is, of course, determined primarily by the melting temperature of the cast metal. Molten metals may be applied to force the liquid metal into the mold. The latter method is known as die casting. Die- casting pressure may be furnished by air, hydraulic means, mechanical means, or centrifugally.

Brass castings have been made from the earliest times, and the foundry industry is as old as knowledge of brass and iron. The foundry industry has development slowly but steadily through the centuries. At present, however, the industry is going through a process of rapid transformation, owing to modern development of new technological method, new machines, and new materials. By virtue of these changes and development, high- quality castings, produced and finished at lower costs, will be available for an increasingly greater number of products. Because of the fact that castings, the complexity of the patterns produced, and the speed of manufacture with the work of a few years ago.

There exist another casting method such as precision casting, vacuum casting process, based on the principle of creating a vacuum in the mold cavity; shell casting process, a new method for casting metals which promises to bring a lot of benefits and many others.

Exercise 13. Choose the correct variants:

1. The mold may be made from ...

1. heat -resisting material ;

2. wood;

3. cast iron;

2. Metal- working industry deals with ...

1. production of metal castings ;

2. oil investigations;

3. classification of technological methods;

Exercise 14. Comment on the statements given below

1. The oldest

2. Metal- working industry is going through a process of rapid transformation.

Exercise 15. Speak on the problem: "The molds arc used only once". Exercise 16. Make up a list of terms, mentioned in the text Exercise 17. Complete the following sentences:

1. One of the basic processes of metal -working industry is

2. The industry is going through a process ...

3. Metal casting methods may be classified ...

4. The mold may be made from.

Exercise 18 Answer the questions using the opening phrases : to my mind, as far as I know, according to, etc.

1. What is die casting?

2. What can you say about brass castings?

3. What refractory materials arc used to make molds?

4. In what way may metal- casting methods be classified?

Exercise 19 Make up a list of questions the answers to which will make the summary of the text.

Exercise 20. Answer the questions to the text:

1. What is the basic

2. What is the oldest method for producing metal castings?

3. What does the work on making sand castings consist of?

4. How many metal- casting methods do you know?

5. What is the mold made from?

6. What can you say about the development of the foundry industry?

Get ready to retell the text.