US1285958A - Multiple bullet-mold. - Google Patents

Description

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MULTIPLE auLLe MOLD.

APPLICATION FILED FEB. I9. 1918.

Patented Nov. 26,y 1918.

3 SHEETS-SHEET l.

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MULTIPLE BULLET MOLD.

APPLICATION FILED 3.19. Isla.

Patented Nov. 26, 191s.

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` MULTIPLE BULLET MOLD.

APPLICATION -FlLED if. I9. 1918.

Patented Nov. 26, 1918.

3 SHEETS-SHEET 3- WILLIAM ECKFORD, RHYL, WALES.

MULTIPLE BULLET-MOLD.

Specification of Letters Patent.

Patented Nov. 26, 1918.

Application filed February 19, 1918. Serial No. 218,146.

To all whom t 'may concern:

Be it known that I, WILLIAM EcKFoRD, a subject of the King of Great Britain, and residing at Rhyl, in the county of Flint, North Wales, have invented certain-new and useful Improvements in Multiple Bullet- Molds, of which the following is a specification. This invention relates to multiple bullet molds such as are employed for casting shrapnel bullets of lead or the like, and the object is to provide a multiple mold by means of which a comparatively large number of'bullets may be cast at the one pouring while insuring that each of 'the respective molds shall be supplied at the required head of fluid metal necessary to produce solid castings.

The invention is illustrated in the accompanying drawings, in which Figure 1 is an elevation of a multiple bullet mold.

Fig. 2 is a corresponding plan.

Fig. 3 is an elevation in transverse section on the line III, III, of Fig. 1.

Fig. l is a face view of one of the two mold plates.

Fig. 5 is part face view to a larger scale.

Fig. 6 is a corresponding part longitudinal section on the line VI, VI of Fig. 5.

Figs. 7 8 and 9 are views, similar to Fig. 4, and show modications.

The multiple mold comprises two side plates or cheeks A and A', the inner faces a1 of which are recessed as herein described to form the bullet molds I), the pouring trough c and the channels or ducts Z1 leading to the molds. The two plates are hinged together by a hinge pin e1 the axis of which is in the plane of the abutting faces of a1 the hinge pin pivotally connects the two lugs f1 formed respectively at the one end of the bands F, the other ends of which bands are extended in the form of handles 2 by means of which the mold is opened and closed in the operation of bullet making. In order to insure proper alinement of the two plates when closed, the one A is fitted with dowel pins di which lit accurately in the corresponding holes (Z3 on the other half A.

The respective bullet molds are formed by oppositely located hemispherical recesses b, the one set in the part A and the other set in the part A.

There are several vertically disposed rows of these recesses, say ten; and the recesses.

ways by which the molten metal flows from the channels (Z1 to the mold Y) and from mold to mold. The cross-section of these passage ways, which are filled with metal when the cast is completed, is made as small as is consistent with the proper flow of metal; the metal parts filling the passage-ways are technically known as gets or gates, aud the smaller'they -are the more readily the bullets separate, and the more easily and perfectly the bullets are stripped of the gets and assume the truly spherical shape. It is of importance therefore to reduce the size of the gets to within reasonable limits, and the grouping of the molds and the provision of end and intermediate channels to feed them permits of this reduction. The spherical recesses are usually drilled out so that the great circles of the groups of hemispheres, which lie on the faces a1 of the mold are just out of contact, being separated just sufciently to form a thin partition wall in which the passage-way is formed. The channels are usually of circular cross-section and are formed half in each part of the mold plate; they communicate at their upper ends with apouring trough c into which the metal is poured from a ladle, or from the spout or tap of a lead-melting pot when the multiple molds are used in connection with a bullet making machine. The vertical channels d1 are connected together by a bottom duct d2.

When the metal is poured into the closed molds it passes first to the bottom of the channels d1 and along the bottom duct d2, thence to the respective groups of molds of the lower row of molds, thus filling the molds in succession from the bottom, which is a matter of considerable importance as affecting a sound cast, inasmuch as it insures the free escape of the air and therefore the absence of blow-holes, and the production of a solid cast. When the mold has cooled and the metal has set, the mold is opened and the cast is removed, the metal which filled the pouring trough and the channels serving, with the gets to hold the bullets together during their removal from the mold plates which is thus accomplished with facility7 and the separation of the bullets is effected afterward as and when desired.

In the modification'shown in Fig. 7 the bottom channel or duct Z2 connecting the vertical channels may be dispensed with and `molds in the wing groups than there are in the central groups which are fed from each end.

Having fully described my invention I declare that what I claim and desire to secure by Letters Patent is l. The improved multiple mold for bullets comprising two hinged side plates, in the abutting faces of which the bullet molds are formeel said molds being disposed in successive horizontal rows, the bullet molds of each horizontal row being connected by communication passage-ways with each other and with feeding channels formed in the said abutting faces and extending from a pouring trough, formed in the top of the said abutting faces, to the lowest row ofv bullet molds; substantially as described.

2. In a bullet mold as claimed in claim l, arranging the bullet molds in the several horizontal rows in groups connected by communicating passage-ways with each other 'and with the feeding channels; substantially as described.

3. In a bullet mold as claimed in claim l, arranging the feeding channels obliquely, and forming the wing groups smaller than the central group; substantially as described.

In witness whereof I set my hand in presence of witnesses.

W. ECKFORD. IVitnesses:

J. E. LLOYD BARNES, JOSEPH E. HIRD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, .D. C.

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