US878345A - Sand-molding machine. - Google Patents

Description

PATENTED FEB. 4, 1908.

INVE NTQR J. J. CHIPGHASB. SAND MOLDING MACHINE. APPLIMTION` FILED 0012.20, 190s.

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JAMES JACKSON GHIPCHASE, OF HORWICI-I, ENGLAND.

SAND-MOLDIN G MACHINE.

Specification of Letters Patent.

Patented Feb. 4, 1908.

.Application filed October 20, 1906. Serial No. 339.864

To all whom 'it may concern.'

Be it known that I, JAMES J AoKsoN CHIP- CHASE, a subject of the King of Great Britain and Ireland, residing at 47 Brownlow road, Horwich, in the county of Lancaster, England, have invented new and useful Improvements in Sand-Molding Machines, of which the following is a specification.

The improvements which form the subject of this invention relate to molding' machines such as are employed in a foundry for the production of raxle boxes and other metal castings g the object of my said invention is to prevent any distortion either in the pattern or in the sand when the pattern is being drawn therefrom, and thereby obtain perfect castings, and uniformity when a number of the same kind are required.

In the accompanying drawings illustrating my said invention and to which I hereinafter refer, Figure l is a sectional elevation, Fig. 1fl a transverse section on line A-B, Fig. 2 a plan, and Fig. 3 an end view of a molding machine as hereinbefore named with my improvements applied.

In these views the 4same letters refer to like parts.

According to my invention and for the purposes hereinbefore named Ifix guides as a to the floor j of the molding shop at each side of a pit as t -in which hydraulic apparatus as c compressed air, or other raising and lowering apparatus is fitted. I place within said guides so as to slide vertically therein brackets as d secured at the base to the piston head c on the hydraulic or compressed air piston c2, each of the brackets d pass through apertures gin the floory' and their upper ends support a stripping plate 7c and a pattern plate Z by said stripping and pattern plates being provided with semi-circular journals m, m', and n n', which rest in bearings formed on the top edges of the aforesaid brackets, so that they are capable of being turned over and their positions reversed; this is effected by a semi-wheel or pulleym2 being formed or fitted on one end of the stripping plate c and a like semi-wheel or pulley n2 at the corresponding end of the pattern plate Z; stops f operated by levers e are inserted in slots p j formed between the two portions m, m and n, a of the journals when the aforesaid plates require to be fixed, or when the pattern plate only is required to be secured but said stops are withdrawn by the levers c when the plates are required to be reversed.

In applying my invention the brackets d are raised by the hydraulic or compressed air mechanism c or other mechanism to the position shown on the drawing with the aforesaid plate thereon. In the first position the pattern plate Z will be under the stripping plate 7u and the pattern which may be zi attanced thereto will project up through the stripping plate k into the moldingV box 1 (Shown in dotted lines) attached thereto. When the sand has been rammed into the molding box the stops j' are withdrawn and the plates are reversed to the positions shown on the drawing with the molding box underneath. The stops f are then reinserted and the brackets d lowered when the stripping plate 7c and mold will be withdrawn from the pattern and the box 7' deposited on a truck as u for carriage to some convenient place for casting. Stops may be provided in the guides a to regulate the distance the brackets d should be lowered or raised to suit the convenience of the molder for the purpose of ramming'. By these means the stripping plate and mold are drawn from the pattern in a perfectly true position, as no shaking or rapping of the pattern is required, and no gaggers or irons of any kind are necessary to support the mold.

claim as my invention 1. In a molding machine, supporting brackets, a stripping plate adapted to support the mold box and provided with an aperture through which the pattern may enter said box, and a pattern plate, in combination with cooperating half bearings for said stripping and pattern plates and means for journaling the same upon the supporting brackets.

2. In a molding machine, supporting brackets, a stripping plate ada ted to support the mold box and provi( ed with an aperture through which the attern may enter said box, and a pattern p ate in combination With oopereting half bearings yfor said In testimony whereof I have signed my stripping and pattern plates, means for journarne to this speoiiieation, in the presence of naling the same upon the supporting braektwo subscribing Witnesses.

ets, said bearings being provided With an JAMES JACKSON CHIPCHASE. opening adapted to receive a supporting Witnesses:

stop whereby one of said lates may be sup- J No. HUGHES,

ported during the rernova of the other. l J. ERNEST HUGHES.

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