US1902559A

US1902559A - Mold

Info

Publication number: US1902559A
Application number: US578648A
Authority: US
Inventors: William E Kemp
Original assignee: Kingston Products Corp
Current assignee: Kingston Products Corp
Priority date: 1931-12-03
Filing date: 1931-12-03
Publication date: 1933-03-21
Anticipated expiration: 1950-03-21

Description

March 21, 1933. w KEMP 1,902,559

MOLD

Filed Dec. 5, 1931 3 Shets-Sheet 1 hill m mzzm/zr Marhh 21, 1933. w. KEMP MOLD 3 Sheets-Sheet 2 Filed Dec. 3, 1931 l. t 3 nu. fi mm mm. \Nm mm March 21, 1933. 'w E KEMP v 1,902,559

MOLD

Filed Dec. 5 1931 V s Sheats-Shet a Z. l g 4 16;!

mag/W2? mold of Figure 1.

tion to chill.

Patented Mar. 21, 1933 wrLLmn: n. or xonouo, mnrnm, assrenon.

BATION, OF KOKOHO, INDIANA,

zro xmesron rnonucrs coma conrona'rron-or, mmnu HOLD Application filed December 3 This invention relates to molds and particularly to a mold for casting small metallic objects such as valve tappets having locahzed hardened portions or faces.

Articles of manufacture, such as automobile tappets, require a tou h, strong body and a hard, wear-resisting h ad. Many valve tappets are now, produced which are formed of composite metalysuch tappets usually comrising .a'steel bod having a cast iron head. guch composite tappets are costly to manufacture and this prohibits their use in moderate priced automotive engines.

It is the purpose of the present invention to provide'a new, advantageous and economlcal method of making a valve tagipet.

To this end, it is an object this invenprovide a mold having an attached It is a particular object of this invention to provide a mold having a movable chill attached thereto.

It is a further particular object of this invention to provide a mold having achill plate movabl mounted in a reservoir containing a coo ing medium so as to enable a fresh surface to be employed in making successive castings.

These and other objects of this invention will beapparent from the following description and claims.

This invention (in a preferred form) is illustrated in the accompanyingegrawmgs and hereinafter more/fully descri On the drawings: 4

F'gure 1 is'a plan view of a mold embodyin the features of this invention.

igure 2 is a side elevational view of the Figure 3 is a sectional view taken approximately on the line III-III of Figure 1 with a art in elevation. I y

igure 4 is a sectional-view taken approximately on-thp line IV -IV of Figure 1,. withparts in elevatio Figure 5 is a bottom plan view of achill used with themold ofthis invention.

As shown on the drawings:

The molding apparatus of this invention comprises a base 1 formed of cast iron or ,1981. Serial so. 570,048.

other similar material, and having apertured ears 1 for securing the base to any suitable in s pe and has an annular reservoir or dfipression 2 therein adjacent the outer peri ery thereof. A boss 3 is formed at the mi dle of the reservoir 2. The boss 3 is provided with a recess 4in which there is journaled a veatical pivot 5. x

he upper portion of the pivot 5 is reduced and threaded as formed of cast iron, at 8, and threadedon on the boss 3. The plate 7 acts as a chill plate for the mold, as will later be explained, and for, this purpose is provided with a number of fins 9 which project downwardly from the under surface thereof and dip into the reservoir 2. The reservoir 2 is provided with an inlet pipe 10 and an outlet pipe 11 for ciigiz llillatgng cooling fluid therethrough.

is recessed centrally as 12 hav ng an internally threaded recess or bore 13.- A bolt 14 is threaded into the recess 13 and mold 15 is preferably made of cast iron and compr

ses sections

16 and 17, each of which is bolted at one end to a hinge piece 18. The hinge pieces having upper and lower proectmg tongues which are ap'ertured to re ceive the pivot bolt 14. I

The op site ends of the

sections

17 and 16 areprovi ed with'bifurcated

members

19 and 20, respectively, bolted thereto as at 21. The bifurcated member 19 is provided with a vertical aperture 22 which receives a bolt 23 for ivotin-g a hasp 24 thereto. The has 24 may swung so as to bereceived by the bifurcated member and when in such position the hasp 24 extends beyond the bifurcated member 20. The extending end of the hasp 24. is provided witha handle 25 which is plvoted thereto as by-thepin 26. Thehandle 25 is govided with a cam surface 27 which may swung against the'bifurca-ted member 20 12,. The pro ection 28 is provided with a suppgrt. The base 1 is preferably cylindrical at'6. A circular plate 7 also 7 the pivot 5 so as to rotate ase 1 is provided with an extension ser ves as a pivot for a mold 15. The

i to lock the hasp in place and thereby prevent 55 ,of'hardness necessary in articles of the type mentioned. After the article has.

1 bore29 extending upwardly from the bottom ternally J'the mold sections 16 and- 17.

. section thereof. At its upper end, bore 29 has an inthreaded portion 30 alined with an internally threaded recess 31 in the bottom of the mold section17. A bolt 32 is threaded through the portion 30 into the recess 31 to holdthe section 17 of the mold against relative movement with respect to the base 1."

The section 16 of the mold is free when the hasp is in unlocked position to rotate about the pin 14. w I

The adjacent faces of the

mold sections

16 and 17 are provided with com lementary recesses 33 and'34 respectively orming, when the mold sections are in engaging position, airlticle' forming cavities 35. The number of the size of the mold 15 and for convenience the mold has been illustrated as having four bf these cavities. I I

, The mold cavities take the sha e of the article to be formed and the lower en s thereof are open to the chill plate 7, as illustrated at 36. The article formin cavities are also pro-- maintain the mold sections in pr oper position during the pouring of the metal. I

In using this molding, apparatus for forming-metal articles such as tappets,the 'iron which is to be cast into the a'rtlce is poured inthe chamber 39 and allowed to flow through the conduits 38 and fill the article forming chill plate. For venting cavities 33. As the lower opening of each cavity 33 is adjacent the chill plate 7 the metal in the mold cavities 33 will contact this any trapped gases or air, a slight spacing 7 is left between the upper surface of'the chill plate and the bottom of the mold. T,his spacing is regulable "by rotating the chill plate onthe threaded pivot 5 and inserting suitable shims between the plate 7 and the boss 3. As is well known, this sudden chilling of the end of the cast article causes the end to have the high degree been cast, the section 16 of the mold is swung away from the sec tion 17 and the cast metal removed therefrom. v I I The metal articles are then broken from the metal formed in the conduits 38 and are ma chined to the proper In order to prevent the chill plate 7 from ese' article forming cavities depends upon.

finish.

- base, means for mamtalnmg one of said'secbeing heated to such an extent as to be inop' erative, it is but necessary to swing it about its pivot 5 after each pouring so as to present a new and chilled section at the base of the pouringcav-ities. The fins 9 extending into the reservoir 2 serve to conduct the heat away from the upper surface of the plate which is in contact with the mold 15.

It will be seen by this invention there is provided novel apparatus for making valve tappets which enables one to produce a. good quality valve tappet at a very economical cost.

The provision of a permanent mold together with a-movabe chill plate enables the 'casting operation to be carried on without considerable delay betweenpourings.

I It will be understood that many ichanges may be made in the arrangement of the parts herein set out without departure from this invention, and I do not wish to be limited otherwise than is necessary by the prior' art and the scope of the appended claims.

I claim as my invention I lxApparatus for forming metal articles having portions of different degrees of hard;

ness,'compr1s1ng a mold having a number of article forming cavities, a base'havinga fluid reservoir, a chill plate pivotallymounted on said base and having a portion thereof directly below said mold and fins on said chill plate extending in said reservoir.

2. A molding apparatus comprising a base,

' a permanent mold proper formed in separate sections, pivotally mounted on said base and 10 0 havin matched recesses in, abutting faces provi ing mold cavities anda chill plate rotatably mounted in said base, said chill plate forming a bottom closure for said mold cavities.

3. A molding'apparatus comprising a base, having a. fluid reservoir therein, a permanent mold proper formedin separate sections pivotally mounted on said base, said mold proper having matched recesses in' abutting faces providing mold cavities, a chill plate 'movably mounted onsaidbase and closing the lower ends of said cavities, and fins extending downwardly from the bottom of said chill plate into the fluid reservoir.

4. A moldingv apparatus comprising a base 5. A molding apparatus comprising a base I having a fluid reservoir therein, a permanent having an annular fluid reservoir therein,

a moldproper comprising sections hinged" to each other and pivotally mounted on said tions rigidly attached to said base, said mold sections having complementary recesses in abutting faces thereof forming mold cavities when said faces are in abutting relation, said mold having a pouring chamber and conduits connecting said mold cavities, looking means on said mold sections for maintalning the adjacent faces in abutting relation, alining means on said sections for properly positioning said complementary recesses, a chill plate movably mounted on said base, said chill plate closing the lower ends of said mold cavities and a plurality of fins extending downwardly from said chillj plate into said reservoir for dissipating the heat from said chill plate.

6. A moldin apparatus for forming cast metal articles liaving portions of different degrees of hardness, comprising a base, an incomplete mold having an article forming cavity and chill means rotatably mounted on said base, a portion. of the chill means form-, ing a closure for the bottom of said cavity, said chill means being slightly spaced from the mold to permit of the venting of trapped gases or air.

7 Apparatus for forming metal articles having portions of different degrees of hardness, comprising a base, a two-part mold having a number of article forming cavities therein attached to said base and a chill plate mounted on said base and movable relative to said mold, said chill plate being disposed beneath the two part mold and forming a bottom for the forming cavities and being slightly spaced from the mold to permit ofthe venting of trapped gases or air.

8. Apparatus for molding metal articles comprising a base, a two-part mold having article forming cavities therein mounted on said base, one of said parts being pivoted to said base to swing horizontally into and out of engagement with the other part and a chill plate movably mounted on said base,

successive portions of said chill late serving as closures for the bottoms 0 said mold cavities.

9. Apparatus for molding metal articles said mold having a reservoir therein provided with means for flowing water therethrou h and a chill plate pivotally mounted on sai support beneath said mold, said chill plate being revolvable to 'present portions thereof as closures for the bottoms of said mold cavities, and having fins extending therefrom movable in the reservoir.

12. A molding apparatus comprising a base, a permanent mold proper attached to said base, said permanent mold proper being formed in separable sections having matched recesses in abuttin faces cavities, and a chil plate or forming the bottom closure of the mold cavities, said chill platebeing rotatably mounted on said base.

In testimony whereof I have hereunto subroviding mold scribed my name at Chicago, Cook County, 7

Illinois.

WILLIAM E. KEMP.

comprising a permanent mold having article formingcavities, a support for said mold and chill means rotatably mounted on said support below said mold and disposed such that upon rotation, successive portions form a bottom for the cavities.

10. Apparatus for molding metal articles comprising a permanent mold having mold cavities with open bottoms, a support for said mold provided with a reservoir for cooling means, and chill means secured to said support. and movable in said reservoir, said chill means forming a closure for the bottoms of said mold cavitles.

11.- Apparatus for moldin metal articles comprising a permanent mo (1 having mold cavities'with open bottoms, a support for