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    Die Casting: Dies—Machines—Methods
    Die Casting: Dies—Machines—Methods
    Die Casting: Dies—Machines—Methods
    Ebook90 pages51 minutes

    Die Casting: Dies—Machines—Methods

    By Chester L. Lucas

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    About this ebook

    This work describes the origin, procedure, and advantages of Die casting. It is a metal casting technique in which one pushes molten metal under high pressure into a mold cavity. Along with presenting the general facts on the subject, the writer goes into detail, explaining the operation of die casting machines, the process of making dies, and some quick tips to help the manufacturers improve efficiency. In addition, the book contains a chapter dedicated to the die casting company E. B. Van Wagner Mfg. Co., illustrating how their operations are carried out. Contents include: Die Casting Making Dies for Die-Casting Machines Van Wagner Mfg. Co.'s Die-Casting Practice
    LanguageEnglish
    PublisherDigiCat
    Release dateJun 2, 2022
    ISBN8596547047469
    Die Casting: Dies—Machines—Methods

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      Book preview

      Die Casting - Chester L. Lucas

      CHAPTER I

      DIE CASTING

      Table of Contents

      Die-casting, a comparatively recent method for producing finished castings, is rapidly proving itself an important factor in the economical manufacture of interchangeable parts for adding machines, typewriters, telephones, automobiles and numerous other products where it is essential that the parts be nicely finished and accurate in dimensions. The term die-casting is self-explanatory, meaning to cast by means of dies; described briefly, the process consists of forcing molten metal into steel dies, allowing it to cool in them, and then opening the dies and removing the finished casting. It is the purpose of this treatise to give a general outline of the die-casting process, showing its possibilities and limitations, and also to give a description of the die-casting machinery and its operation, of the fundamental principles involved, and of the methods used in the die-making. Illustrative examples of the best types of dies, based on results obtained from actual experience, will also be given.

      Origin of Die Casting

      Table of Contents

      The origin of the die-casting process is somewhat difficult to ascertain. We may look into the history of type founding and find that away back in 1838, the first casting machine for type, invented by Bruce, was a machine that involved the principles of die-casting as it is practiced to-day. More recently, in 1885, Otto Mergenthaler brought out the linotype machine. This machine is a good example of a die-casting machine. However, as we interpret the word to-day, die-casting is a broader term than type-casting or linotyping, although its development without doubt is due to the success of the linotype machine. It is doubtful if die-casting, properly speaking, was originated until about fifteen years ago, and it is certain that it is only during the past few years that the activities in this line have been very noticeable.

      One of the first experiments in the direction of die-casting was undertaken to get out some rubber mold parts cheaply enough to leave a profit on a job that was beginning to look dubious from the financial side. The molds were for making rubber plates about three inches square and one-eighth inch thick, the top side of which was decorated with fine raised scroll work; it was this latter feature that gave the trouble. After wasting much time and money trying to stamp the mold parts, a metal-tight box was made as shown in Figs.1 and 2 with a block screwed in it, the purpose of which was to shape the mold impression and impart to it the scroll design. As shown, the ends of the box were removable, being screwed on. This box was placed under a screw press and a straight plunger that just filled the top of the box was fitted to the head of the press. After the two were lined up, molten type metal was poured into the box, and as soon as the metal had cooled to the mushy state, the ram of the press was forced down as shown in Fig.2. Next, the ends of the box were removed, the screw holding the block taken out, and the die-casting pushed from the box. The object in having the inclined side to the box was to produce a piece shaped with the proper inclination for its position in the final mold used for casting the rubber plates. The illustrations give an idea of the compression that took place. The die-casting was found to be sharp at the corners and free from flaws, and the scroll work came up in fine shape. Naturally the rest of the mold parts were made in the same way and the job turned from failure into success.

      From such simple experiments as these, the die-casting industry has developed to its present stage. In view of the advances that have been made in die-casting, it is singular that there are to-day only about a dozen concerns in the business in this country, but as the subject becomes better understood, and the possibilities of the process are realized, the demand for this class of castings will result in many other firms going into the work, and it is not improbable that a large number of factories will install die-casting plants of their own to aid them in producing better work in a more economical way.

      Advantages, Possibilities and

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