US557128A - Mold for making pneumatic tires and covers for same - Google Patents
Mold for making pneumatic tires and covers for same Download PDFInfo
- Publication number
- US557128A US557128A US557128DA US557128A US 557128 A US557128 A US 557128A US 557128D A US557128D A US 557128DA US 557128 A US557128 A US 557128A
- Authority
- US
- United States
- Prior art keywords
- mold
- ring
- covers
- same
- pneumatic tires
- 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
- 239000000463 material Substances 0.000 description 6
- 239000004753 textile Substances 0.000 description 6
- 238000004073 vulcanization Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
Definitions
- Figure I represents a top plan View of one form of my improved mold for pneumatic wheel-tires and covers
- Fig.'II a transverse section of a portion of the mold, illustrating the making of a tire-cover in the same
- Fig. III a top plan view of the expansible mold-closing ring for the mold
- Fig. IV a perspective view of onehalf of the mold, illustrating another form of expanding device for the ring and illustrating the mold used for the manufacture of a tubular tire
- Fig. V a top plan View of said mold.
- the mold essentially consists of an outer mold-ring A, and an inner expansible moldclosing ring B, which covers the mold-cavity in the outer ring.
- the outer mold-ring has an annular mold-cavity A, of a shape corresponding to the external shape of the tire or cover, and is formed with annular grooves a at the edges of the cavity when the mold is intended for tire-covers having locking-beads at their edges.
- the inner face of the outer mold-ring is preferably ground smooth, so as to afford a fluid-tight fit for the mold-closing ring.
- the inner mold-closing ring has its outer face shaped to fit against the inner face of the outer ring and has scarfed ends b,which may fit tightly at their lap.
- Means are provided at the scarfed ends of the inner ring for the purpose of expanding the same, and I have illustrated two forms of such means, respectively in Figs. I, II and III, and in Figs. IV and V.
- one end of the inner ring has a lug Z) formed with a threaded perforation, in which an expanding-screw b fits.
- Said screw bears against a lug b upon the other end of the ring, so that the ring may be expanded and contracted by turning the screw.
- said latter form of expanding mechanism the action of the screw is slow, and the screw requires adjustment each time the mold is closed.
- Said device consists of an arm (I, pivoted between ears 12 upon one end of the ring, and having a shouldered screw-bolt d, pivoted to its free end, and a longitudinally-slotted arm d pivoted between ears b upon the opposite end of the ring.
- the screw-bolt is inserted through the slot in the arm and is secured in its adjusted position by a nut (1
- the adjustment of the screw-bolt is such that the ring will be expanded to the proper extent when the two arms are straightened into the position illustrated in full lines in the drawings, on the principle of two toggle-arms.
- the arms are flexed into the position illustrated in dotted lines in the drawings, when the ring is contracted sufficiently to be removed from the outer ring.
- a steam-inlet B preferably provided with a valve b, is provided at one portion of the ring, and a steam-exhaust B likewise provided with a valve b, is provided at an opposite portion of the ring.
- the material from which the cover or tire is made is placed in the moldcavity, which is then closed by the inner ring.
- the mold is placed in a vulcanizingchamber, and steam is admitted through the inlet, and, in the case of a cover-mold, the condensed water is drawn off by the exhaust, while the mold and contents are exposed to the vulcanizing temperature.
- the steam will expand the material forming the cover or tire to make it conform to the shape of the mold,
- Air, gas, water, or any other fluid either previously heated or becoming heated during the process of vulcanization, may be employed equally as well as steam for the purpose of inflating and supporting the cover or tire.
- a cover for a pneumatic tire is made.
- Said cover is composed of an outer layer 0 of rubber and an inner textile layer 0.
- the edges of the rubber layer are pressed into the grooves a of the mold to form beads, and the edges of the textile layer are drawn over the inner face of the outer ring and over the outer sides of the i'nold-ring to formapacking between the parts of the mold.
- the cover will be vulcanized into the exact shape desired for it, which will be a great advantage over the methods usually employed, in which the rubber layer is first placed upon the face of a pulley or mandrel, then the textile layer is placed over the rubber, whereupon vulcanization takes place.
- the rubber layer which in the tire or cover is to be the outer layer, is molded as the inner layer, and must be stretched out o of its vulcanized shape to attain the shape in which the cover or tire is to be applied.
- the layers are vulcanized into their proper shape and willneed no reshaping.
- the tube is suitably formed, placed in the mold, and confined by the ring, and the usual inflating tube of the tire is connected to the inlet so that the inflating medium may be introduced into the tire to maintain the same in the desired shape during vulcanization.
- a mold for pneumatic tires and covers for the same consisting of a mold-ring, a mold-closing ring constructed to complete the mold-cavity and having means for circumfer entially adjusting it to fit against and tightly cover the mold-ring, and an inlet for the inflating medium opening into the mold-cavity, substantially as set forth.
- a mold for pneumatic tires and covers for the same consisting of two annular parts, one of said parts fitting within the other, and one of said parts having means for peripherally adjusting it to fit the other, substantially as set forth.
- a mold for pneumatic tires and covers for the same consisting of a mold-ring, an expansible moldring, and an inlet into the mold-cavity iuclosed by said rings for introducing an inflating medium, substantially as set forth.
- a mold for pneumatic tires and covers for the same consisting of an outer moldring having a mold-cavity in its inner face, an inner mold-closing ring having scarfed ends and means for expanding it, and a valved inlet into the inner mold-closing ring, substantially as set forth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
(No Model.) 2 Sheets-Sheet 1.
- J. P. IVES. v MOLD FOR MAKING PNEUMATIC TIRES AND COVERS FOR SAME.
No. 557,128. Patented Max:131, 1896.
x A M FIG-DI WITNESSES,
gNv NTOR,
AN DREW BJIRAHAWL PNUYO-LI'I'NQWASNINGTQKDC (No Model. 2 Sheets-Sheet 2.
J. RIVES. MOLD FOR MAKING PNEUMATIGjTIRES AND COVERS FOR SAME;
No. 557,128. Patented ar. 31, 1896.
WITNESSES, INVEN T R,
ANDREW B.GFAH AM. PHOTOL-"NO. WASHINGTON, D1),
U ITED STATES PATENT OFFICE.
JOHN F. IVES, OF CLEVELAND, OHIO.
MOLD FOR MAKING PNEUMATIC TIRES AND COVERS FOR SAME.
SPECIFICATION forming part of Letters Patent No. 557,128, dated March 31, 1896.
Application filed August 8, 1895. Serial No. 558,592. (No model.)
To aZZ whom it may concern.-
Be it known that I, JOHN FIsH IVES, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Molds for Making Pneumatic Tires and Covers for the Same, of which the following is a specification, the principle of the invention being herein explained and.
the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.
The annexed drawings and the following description set forth in detail one mechanical form embodying the invention, such detail construction being but one of various mechanical forms in which the principle of the invention may be used.
In said annexed drawings, Figure I represents a top plan View of one form of my improved mold for pneumatic wheel-tires and covers; Fig.'II, a transverse section of a portion of the mold, illustrating the making of a tire-cover in the same; Fig. III, a top plan view of the expansible mold-closing ring for the mold; Fig. IV, a perspective view of onehalf of the mold, illustrating another form of expanding device for the ring and illustrating the mold used for the manufacture of a tubular tire; and Fig. V, a top plan View of said mold.
The mold essentially consists of an outer mold-ring A, and an inner expansible moldclosing ring B, which covers the mold-cavity in the outer ring. The outer mold-ring has an annular mold-cavity A, of a shape corresponding to the external shape of the tire or cover, and is formed with annular grooves a at the edges of the cavity when the mold is intended for tire-covers having locking-beads at their edges. The inner face of the outer mold-ring is preferably ground smooth, so as to afford a fluid-tight fit for the mold-closing ring. The inner mold-closing ring has its outer face shaped to fit against the inner face of the outer ring and has scarfed ends b,which may fit tightly at their lap. Means are provided at the scarfed ends of the inner ring for the purpose of expanding the same, and I have illustrated two forms of such means, respectively in Figs. I, II and III, and in Figs. IV and V. In the first form one end of the inner ring has a lug Z) formed with a threaded perforation, in which an expanding-screw b fits. Said screw bears against a lug b upon the other end of the ring, so that the ring may be expanded and contracted by turning the screw. In said latter form of expanding mechanism the action of the screw is slow, and the screw requires adjustment each time the mold is closed.
WVhere quick action in the expanding device is required, and where one adjustment of the expanding device is desired, which may remain undisturbed during the locking and unlocking of the ring in the successive manufacture of a number of tires or covers in the same mold, the device illustrated in Figs. IV and V is desirable. Said device consists of an arm (I, pivoted between ears 12 upon one end of the ring, and having a shouldered screw-bolt d, pivoted to its free end, and a longitudinally-slotted arm d pivoted between ears b upon the opposite end of the ring. The screw-bolt is inserted through the slot in the arm and is secured in its adjusted position by a nut (1 The adjustment of the screw-bolt is such that the ring will be expanded to the proper extent when the two arms are straightened into the position illustrated in full lines in the drawings, on the principle of two toggle-arms. When the ring is to be removed, the arms are flexed into the position illustrated in dotted lines in the drawings, when the ring is contracted sufficiently to be removed from the outer ring. A steam-inlet B, preferably provided with a valve b, is provided at one portion of the ring, and a steam-exhaust B likewise provided with a valve b, is provided at an opposite portion of the ring. When the mold is employed to make tubular tires, the inflatingtube of the tire is connected to the inlet and the exhaust is dispensed with.
In practice the material from which the cover or tire is made is placed in the moldcavity, which is then closed by the inner ring. The mold is placed in a vulcanizingchamber, and steam is admitted through the inlet, and, in the case of a cover-mold, the condensed water is drawn off by the exhaust, while the mold and contents are exposed to the vulcanizing temperature. The steam will expand the material forming the cover or tire to make it conform to the shape of the mold,
and the heat from the steam will exert its vulcanizing action upon said material. Air, gas, water, or any other fluid, either previously heated or becoming heated during the process of vulcanization, may be employed equally as well as steam for the purpose of inflating and supporting the cover or tire.
In the form illustrated in Figs. I, II, and III of the drawings a cover for a pneumatic tire is made. Said cover is composed of an outer layer 0 of rubber and an inner textile layer 0. The edges of the rubber layer are pressed into the grooves a of the mold to form beads, and the edges of the textile layer are drawn over the inner face of the outer ring and over the outer sides of the i'nold-ring to formapacking between the parts of the mold. The cover will be vulcanized into the exact shape desired for it, which will be a great advantage over the methods usually employed, in which the rubber layer is first placed upon the face of a pulley or mandrel, then the textile layer is placed over the rubber, whereupon vulcanization takes place. By such method the rubber layer, which in the tire or cover is to be the outer layer, is molded as the inner layer, and must be stretched out o of its vulcanized shape to attain the shape in which the cover or tire is to be applied. By my method the layers are vulcanized into their proper shape and willneed no reshaping.
hen making a tubular tire, the tube is suitably formed, placed in the mold, and confined by the ring, and the usual inflating tube of the tire is connected to the inlet so that the inflating medium may be introduced into the tire to maintain the same in the desired shape during vulcanization.
Other modes of applying the principle of my invention may be employed for the mode herein explained. Change may therefore be made as regards the mechanism thus disclosed, provided the principles of construction set forth respectively in the following claims are employed.
I therefore particularly point out and distinctly claim as my invention 1. A mold for pneumatic tires and covers for the same, consisting of a mold-ring, a mold-closing ring constructed to complete the mold-cavity and having means for circumfer entially adjusting it to fit against and tightly cover the mold-ring, and an inlet for the inflating medium opening into the mold-cavity, substantially as set forth.
2. A mold for pneumatic tires and covers for the same, consisting of two annular parts, one of said parts fitting within the other, and one of said parts having means for peripherally adjusting it to fit the other, substantially as set forth.
3. A mold for pneumatic tires and covers for the same, consisting of a mold-ring, an expansible moldring, and an inlet into the mold-cavity iuclosed by said rings for introducing an inflating medium, substantially as set forth.
i. A mold for pneumatic tires and covers for the same, consisting of an outer moldring having a mold-cavity in its inner face, an inner mold-closing ring having scarfed ends and means for expanding it, and a valved inlet into the inner mold-closing ring, substantially as set forth.
In testimony that I claim the foregoing to be my invention I have hereunto set myhand this 1st day of August, A. D. 1895.
J. F. IVES.
Witnesses J. B. FAY, DAVID T. DAVIES.
Publications (1)
Publication Number | Publication Date |
---|---|
US557128A true US557128A (en) | 1896-03-31 |
Family
ID=2625864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US557128D Expired - Lifetime US557128A (en) | Mold for making pneumatic tires and covers for same |
Country Status (1)
Country | Link |
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US (1) | US557128A (en) |
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- US US557128D patent/US557128A/en not_active Expired - Lifetime
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