US500591A - Chill-mold for casting teeth on gear-wheels - Google Patents
Chill-mold for casting teeth on gear-wheels Download PDFInfo
- Publication number
- US500591A US500591A US500591DA US500591A US 500591 A US500591 A US 500591A US 500591D A US500591D A US 500591DA US 500591 A US500591 A US 500591A
- Authority
- US
- United States
- Prior art keywords
- mold
- ring
- teeth
- wheels
- chill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005266 casting Methods 0.000 title description 14
- 229910001018 Cast iron Inorganic materials 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
Definitions
- SAMUEL E MAXVYELL, OF ASPINVVALL, PENNSYLVANIA.
- the object of this invention is to manufacture gear wheels which shall be much more durable and accurate than those made by the processes now in use.
- gear wheels There are two processes by which gear wheels are now usually made.
- the wheel is cast solid and the teeth are cut in it afterward.
- it is necessary to cut into the soft part of the iron, thus forming a soft surface on the tooth of the wheel which quickly wears out.
- the wheel, teeth and all is cast in green sand.
- the wheels cast in this way are somewhat more durable, but in order that the wheel, when cast, may be lifted out of the mold, the teeth must be tapered in a manner that somewhatspoils their shape.
- my invention it is intended to cast the wheel in the usual manner of casting them in green sand, except the teeth which are formed in my cast iron chill mold.
- the hot metal which forms the teeth is poured into the mold, it comes in contact with the cold iron of the mold and by this means the surface of the-teeth is chilled and hardened forming a true wheel with teeth having a hard durable surface.
- the chill mold consists of a cast-iron ring divided into segments varying in number according to the number of teeth in the wheel to be cast.
- Figure 1 represents a top view of the mold.
- E is a casting of a gear wheel.
- D is a sectional ring composed of a number of segments to be determined by the number of teeth in the wheel to be cast.
- 0 is a cast iron ring; this ring has a taper on the inner edge as hereinafter stated, and it draws together, clamps and holds the segments of the ring D in position.
- the outer edge of the sectional ring D and the inner edge of the ring G are tapered, so that when placed together the segments may be drawn tightly into position around the pattern.
- Fig. 2 of the drawings there is a groove which is shown in Fig. 2 of the drawings by the letter H.
- Fig. 2 is a section view of mold and casting through line A-B.
- D is the sectional ring; 0 is the outer cast-iron ring.
- E is the casting of wheel.
- G shows the taper in rings D and G above referred to.
- a third cast-iron ring is used, which is shown by dotted lines in Fig. 1 of the drawings, and by letter F in Fig. 2.
- the segments of ring D are placed upon this castiron ring and there is a tongue on ring F which fits into the groove H in the segments of ring D, holding them firmly in position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
Description
(No ModL) E S. E. MAXWELL.
R CASTING TEETH 0N GEAR WHEELS.
Patented July 4, 1893.
CHILL MOLD F0 No. 500,591.
I INVENTOI? UNITED STATES PATENT OFFICE.
SAMUEL E. MAXVYELL, OF ASPINVVALL, PENNSYLVANIA.
CHILL-MOLD FOR CASTING TEETH ON GEAR-WHEELS.
SPECIFIGATTON forming part of Letters Patent No. 500,591, dated July 4, 1893.
Application filed July 2, 1892. Serial No. 438,840. (No model.)
To all whom it may concern.-
Be it known that I, SAMUEL EDWARD MAX- WELL, a citizen of the United States, residing at Aspinwall, county of Allegheny, State of Pennsylvania, have invented a new and useful Chill-Mold for Casting Teeth on Gear- Wheels, of which the following is a specification.
The object of this invention is to manufacture gear wheels which shall be much more durable and accurate than those made by the processes now in use. There are two processes by which gear wheels are now usually made. By the first process the wheel is cast solid and the teeth are cut in it afterward. By this method, it is necessary to cut into the soft part of the iron, thus forming a soft surface on the tooth of the wheel which quickly wears out. By the second process the wheel, teeth and all, is cast in green sand. The wheels cast in this way are somewhat more durable, but in order that the wheel, when cast, may be lifted out of the mold, the teeth must be tapered in a manner that somewhatspoils their shape.
By my invention it is intended to cast the wheel in the usual manner of casting them in green sand, except the teeth which are formed in my cast iron chill mold. By this method, as the hot metal which forms the teeth is poured into the mold, it comes in contact with the cold iron of the mold and by this means the surface of the-teeth is chilled and hardened forming a true wheel with teeth having a hard durable surface.
The chill mold consists of a cast-iron ring divided into segments varying in number according to the number of teeth in the wheel to be cast.
In the drawings hereto attached Figure 1 represents a top view of the mold. E is a casting of a gear wheel. D is a sectional ring composed of a number of segments to be determined by the number of teeth in the wheel to be cast. 0 is a cast iron ring; this ring has a taper on the inner edge as hereinafter stated, and it draws together, clamps and holds the segments of the ring D in position. The outer edge of the sectional ring D and the inner edge of the ring G are tapered, so that when placed together the segments may be drawn tightly into position around the pattern. In the under side of the section ring D there is a groove which is shown in Fig. 2 of the drawings by the letter H.
Fig. 2 is a section view of mold and casting through line A-B. D is the sectional ring; 0 is the outer cast-iron ring. E is the casting of wheel. In this figure G shows the taper in rings D and G above referred to. As an additional precaution and device for holding the segments of the ring D in place a third cast-iron ring is used, which is shown by dotted lines in Fig. 1 of the drawings, and by letter F in Fig. 2. The segments of ring D are placed upon this castiron ring and there is a tongue on ring F which fits into the groove H in the segments of ring D, holding them firmly in position.
Having fully described my invention, what I claim, and desire to secure a patent for,is
The combination of the sectional ring D, having the taper on the outer edge and the groove H on the under side thereof, the outer cast iron ring 0 with the taper on the inner edge corresponding to the taper on ring D, and the under cast iron ring F, with the tongue fitting into the groove H in segments of ring D.
SAMUEL E. MAXWELL.
Witnesses:
J ESSE T. LAZEAR, CHAS. P. ORD.
Publications (1)
Publication Number | Publication Date |
---|---|
US500591A true US500591A (en) | 1893-07-04 |
Family
ID=2569426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US500591D Expired - Lifetime US500591A (en) | Chill-mold for casting teeth on gear-wheels |
Country Status (1)
Country | Link |
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US (1) | US500591A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538368A (en) * | 1947-09-02 | 1951-01-16 | Kost Alwin | Segmental mold for gear wheels |
-
0
- US US500591D patent/US500591A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2538368A (en) * | 1947-09-02 | 1951-01-16 | Kost Alwin | Segmental mold for gear wheels |
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