US1535292A - Mold with means for scoring castings - Google Patents

Description

April 28, 1925. 1,535,292

M. S. CLAWSON MOLD WITH MEANS FOR SCORING CASTINGS Filed March 14, 1925 I w i and State of New pertain new and useful Improvements in Molds withv Means for Scoring Castings, of

' .trated in the Patented Apr. 28, I925.

MONROE S CLAWSON, OF UPPER MONTCLAIR, NEW JERSEY.

MOLD MEANS FOR SCORING CASTINGS.

Application filed March 14, 1923.

To all whom it may concern:

Be it known that I, Mormon S. OLAwsoN, a citizen of the United States, residing at Upper Montclair, in the county of Essex Jersey, have invented which the followingis a specification.

This invention relates to molds for cast- 7 ing metal and has for its object the pro-vision of a mold, especially of the chill type, provided with means for scoring the casting, it being probable that the casting will break at the points of scoring upon contraction of the metal when it solidifies.

An important and more specific object is the provision of a mold which is provided at desired points with metal inserts which project into the filling passage, the runner, and also the riser, whereby to provide scoring in the casting, the inserts being mounted within slots milled in the chill mold so as to be removed therefrom with the casting in the event that the metal welds itself onto the inserts.

vAn additional object is the provision of soc-ring means of this character which will be simple and inexpensive, highly eflicient and positive in action, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illns accompanying drawings in which Fig. 1 is a vertical longitudinal section through a chill mold showing the application of my invention; and

Fig. 2 is a fragmentary section showing a modification.

Referring more particularly to the drawings, I have shown a chill mold consisting of the usual upper B, respectively, the ordinary devices indicated at O. The lower section B is formed with a mold cavity 11) with opposite sides of which communicate runners E and F leading respectively to the sprue or filling passage G and riser II. This is a conventional type of chill mold.

In carrying out my invention I provide and lower sections A and netal inserts shown at 10, 11 and 12, which mserts are arranged in pairs and fit within suitable slots milled in the mold at the desired points. I have shown the pairs of held in proper relation by.

Serial No. 625,149.

inserts 10 as extending into the runners E and near the mold cavity D. In the riser H I have shown one pair of inserts 11 located near the juncture of the riscr with the runner and in the sprue or filling passage G I have shown two pairs of inserts 12 arranged opposite each other, but it should be understood that in either instance or at all points I may use only one pair or opposite pairs as this is a matter which might depend 'upon the size of the casting, the nature of the metal being cast and also the size of the runners and other passages.

In Fig. 2 I have shown the inserts 13 as single strips or pieces instead of being double or in pairs, this modification being ellicient in the casting of certain metals.

ssuming that the mold has been equipped with my inserts at any or all of the points specified, it will be apparent that when the molten metal is poured these inserts will effect scoring thereof and in all probability when the metal contracts on solidifying or cooling a fracture will occur at This is particularly true in case the mold is of the chill type, though it should be understood that the use of the inserts is not limited to this variety of mold as they may also with molds of, i

be employed in connection other types. Even though a fracture does not occur, it is quite apparent that the casting will be scored to such an extent that breaking thereof at the proper points may be readily accon'lplished subsequent to removal from the mold. In some instances the metal may weld itself onto the inserts but no disadvantage results from this as the inserts are readily removable from the slots provided for holding them.

While I have shown and described the preferred embodiment of the invention, it is of course to be understood that I reserve the right to. make such changes therein as will not depart from the spirit of the invention or the scope of the claims.

I claim:

1. In a mold, scoring means for the casting consisting of metallic prQ ectmns extending into the runners, filling passages and riser.

2. In a mold, means for scoring the cast ing upon pouring of the molten metal into the mold, consisting of metallic projections extending into the molten metal passages at both sides of the mold cavity.

3. In a mold, means for scoring the casting consisting of metallic inserts fitting withthe inserts.

in slots in the mold and partially obstruct ing runners.

1. In a mold, means for scoring the casting during the making tl1ereof,.c0nsisting of metallic inserts fitting within slots in the mold and extendingpartly across the filling passage and riser.

5. In a mold, means for scoring'the casting during the making; thereof, consisting of metal inserts fitting within slots in the mold and extending partly across the filling passage. the runner and riser.

6. In a mold, means for scoring the-casting duringthe making thereof, comprising metallic inserts arranged in opposed relation and extendin )artl across the assa 'es a: a: provided for the molten metal.

7. In a mold, means for scoring and breaking a casting upon cooling thereof, comprismg inserts located at opposite sides of the mold cavity and arranged in pairs to define a constricted space therebetween, the different pairs being located at opposite sides of bends whereby to effect fracture when strain is caused by contraction of the casting upon cooling.

8. In a mold, casting, scoring and breaking means comprising metallic inserts removably fitted within slots in the mold and extending in partially obstructing relation to the passages for the molten metal, each insert being formed of a pair of separate pieces arranged in contacting relation whereby fracture may occur even though the molten metal weld itself onto the inserts.

In testimony whereof I hereto afiix my signature.

MONROE S. GLAWSON.

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