US3115403A

US3115403A - Glass bending mold

Info

Publication number: US3115403A
Application number: US77375A
Authority: US
Inventors: James P Julio
Original assignee: Chrysler Corp
Current assignee: Old Carco LLC
Priority date: 1960-12-21
Filing date: 1960-12-21
Publication date: 1963-12-24
Anticipated expiration: 1980-12-24

Description

Dec. 24, 1963 J. P. JULIO GLASS BENDING MOLD 2 Sheets-Sheet 1 Filed Dec. 21, 1960 HWMQHM Dec. 24, 1963 J. P. JULIO GLASS BENDING MQLD 2 Sheets-Sheet 2 Filed Dec. 21, 1960 HWMWQ HM array/urns:

United States Patent 3,115,413? GLASS BENDING M011) James 1. lulio, Oak Park, Mich, assignor to Chrysler Corporation, Highland Parlr, Mich, a corporation of Delaware Filed Dec. 21, 1969, Ser. No. 77,375 10 Claims. (Cl. 65-290) This invention relates to a glass bending mold and particularly to a sectionalized bending mold having end or wing sections pivotally connected to a relatively fixed center section and interconnected with each other. This invention is an improvement on the bending mold disclosed in the pending patent application of Harvey 1. Little, Serial No. 816,5 80, filed May 28, 1959.

It is a primary object of this invention to provide a glass bending mold with pivotally mounted end or wing sections wherein there is a novel means for applying weights to and interconnecting the spaced apart end or wing sections.

It is another object of this invention to provide a novel means for applying weights to the pivotally mounted end or wing sections of a sectionalized mold such that the weight means will be most effective to cause closing of the mold end sections as the glass supported thereon softens and yet have the weight means so arranged that it does not tend to distort the end or wing sections.

It is still another object of this invention to provide a novel means for supporting the wing section actuating weights on a relatively fixed section of the sectionalized bending mold and connecting the weights to the relatively movable wing sections in such a manner that the movement of the weights is transmitted to the wing sections Without requiring the wing sections to support the Weights.

It is a further object of this invention to provide a weight supporting means for the pivotally mounted wing sections of a sectionalized bending mold such that equal weight means will be applied to each of the spaced end sections and the weight supporting means will tend to synchronize the movement of the pivotally mounted end sections Without causing any distortion thereof.

It is also another object of this invention to provide a simplified form of actuating means for the pivoted wing sections of a sectionalized mold that will separate the wing section actuating weights from the wing sections so that the wing sections are of minimum weight and the most simplified structure.

it is a further object of this invention to support the wing section actuating means on a relatively fixed mold section such that different wing sections can be readily applied to the same mold base section.

It is still another object of this invention, to connect the sectionalized bending mold to its supporting frame such that relative movement therebetween may be accommodated Without causing mold distortion.

Other objects and advantages of this invention will become readily apparent from a reading of the following description and a consideration of the related drawings wherein:

FIG. 1 is a side elevation of a bending mold embodying this invention in open position;

FIG. 2 is a side elevation of the mold shown in FIG. 1 in closed position;

FIG. 3 is a top plan view of the mold shown in FIG. 2 with the glass sheet removed therefrom;

FIG. 4 is an enlarged fragmentary side elevational view of one of the pivot connections between the wing sections and the center section, the view showing those portions of the mold within the circle A of FIG. 2;

FIG. 5 is an enlarged fragmentary top plan view of the pivot connection shown in FIG. 4; and

FIG. 6 is a fragmentary side elevational view of a bending mold having a modified form of this invention.

The drawings show a glass bending mold M that is attached to a carriage frame C to facilitate its passage through a bending lehr not shown. Mold M is of the sectionalized type and includes a stationary central or intermediate supporting section 10 that has end or Wing sections 11, 12 pivotally connected to its opposite ends. The fixed or stationary center section 10 of this bending mold includes the vertical, transversely spaced, narrow side rails 10a that are interconnected by the diagonally extending tie rods ltlb. The top edges of the spaced rails 1% provide portions of the shaping surfaces that support and control the shape of the glass sheet G that is to be bent on the mold. The opposite ends of the side rails 19:: each are mounted on pedestal supports 13. Pedestals 13 can be fixedly or detachably connected at 74 to the tubes 9 that provide a part of the carriage or base frame C for the mold M. Struts 14 extend between transversely aligned pedestals 13 of base C to rigidify the mounting of the pedestals 13 on the carriage C.

Wing or end sections 11, 12 are identical and each consists of a U-shaped, substantially vertically extending rail 110 or 12a that may include a surrounding flange 11b or 12b respectively that rigidifies the associated U-shaped end frames 11a and 12a. As the wing sections 11, 12 are identical only the wing section 11 will be described in detail. Wing section flange 11b has U-shaped pivot pin supporting brackets 15, 15 fixed to each of its end portions. The brackets 15 have bores therethrough to receive the pivot pins 16 that are mounted in U-shaped brackets 17 carried by the pedestals 13. FIGS. 3 and 5 give a clear plan view of the arrangement of the brackets 15, 17 with respect to the pivot shafts 16. Pivot pins 16 pivotally connect the wing sections 11, 12 to the mold frame center sections 10 so that the wing sections can fold between the open and closed positions shown respectively in FIGS. 1 and 2.

Seated on the top 13a of each pedestal 13 (see FIGS. 4 and 5) is the associated end of the noted center section side rail 10a. The side rail end 10c has a bore therethrough to receive an anchor bolt 31. The bolt receiving bore is considerably greater in diameter than the bolt 31 so that it can provide an expansion slot to prevent distortion of the rail 10a as a result of differences in thermal capacity between the mold M and carriage C.

Also adjustably seated on the top 13a of the pedestal 13 by bolt 32 is a yoke-like bracket 33 having upstanding legs that support a pivot pin 34. Pivot pin 34 journals a rocking lever 35 having a cam surface 36 formed along its upper edge. The crowned cam surface 36 is adapted to be engaged by a roller cam 37 carried by a pin 38 projecting from the flange formation 11b of the mold wing section 11. Rocking levers 35 each have a plurality of holes 39 in their other end portions from which pivot links 41 depend. The several holes 39 provide for adjustability in mounting of the weight supporting links 41. lPivot pins 19 connect the links 41 to the levers 35. The lower ends of the pivot links 41 are pivotally connected by pins 20 to the adjacent end of a weight supporting wing section connector bar 21.

Connector bars 21 extend between the lever links 41 at each end of the mold M along each side thereof. The connector bars 21 are each provided with means for adjustably mounting one or more weights 25 on the bars 21. Bolts 22 or any other form of attachment means can be used to attach the weights 25 to the connector bars 21. It is also proposed to form the bars 21 such that they will provide integral weight means. Also, the bars 21 can be formed of interconnected sections so that they may be adjustable in length to fit different molds for different glass patterns.

From the foregoing description and a consideration of the drawings it will be noted that when the mold is in open position (see FIG. 1) the flat sheet of glass G is supported at four points along its length by the opened mold. The major portion of the weight of the glass G is supported by the ends of the rails a of the fixed or center section 10 of the mold M as indicated at 23. A portion of the weight of the glass G may also be supported by the tips of the depressed or opened wing sec tions as shown at 43. It will be noted that when the mold M is opened to receive the glass G that there are no weight means projecting above the surface of the glass G to interfere with the loading of the glass onto the mold M.

As the mold M of FIG. 1 is moved through a bending lehr on conveyor rolls 50 the glass G begins to soften and the weights 25 acting through the links 41 apply equal loadings to the inwardly extending ends of the levers 35. The weights 25 thus exert forces on the wings 11, 12 that tend to fold the wings 11, 12 upwardly to assist in bending the glass G to the concave shape shown in FIG. 2. Not only does the lever and link system 41, 35 lend itself to application of equal bending forces to the wing sections 11, 12 but in addition the connector bars 21 tend to synchronize the bending action of the wing sections to facilitate the production of symmetrically bent glass.

It is thought to be obvious from a consideration of FIG. 4 in particular that the several holes 39 permit variation in the effective length of the lever 35 so that different bending action can be readily obtained with this mold to adapt it to different glass shapes. Likewise, the adjustment set screws 32 also assist in controlling the type of bending of the wings when this mold is used.

Not only are the adjustably mounted links 41 of an advantage for bending but in addition the connector bars 21 cooperate with the pivot links 41 to further improve the action as well as the flexibility of this mold. Connector bars 21 not only tend to synchronize the hinging action of the mold wings but in addition they provide a means for placing of the bending weights in a preferred non-obstructing position where the weights will not interfere with either mold loading or movement of the mold through a lehr on a conventional conveyor system.

As previously pointed out in the objects of this invention, one of the prime advantages of this mold construction is that the weight means 25 and its actuated linkage 21, 41, 35 is supported by the carriage frame C so that the weight thereof is not borne by the pivotally mounted, relatively lightweight, mold wing sections 11, 12. As a result of the mounting of the weight-actuated wing section bending linkage on the mold fixed center section 10 rather than on the pivotally mounted mold wing sections 11, 12, there is little chance for the weighted linkage to cause distortion or deflection of the wing sections 11, 12. Also, because the wing sections 11, 12 do not have to support the weighted linkage, the wing sections can be made of the lightest possible construction and this reduction in the amount of metal used in the wing sections also reduces the chances of thermal problems being associated with the wing sections. Another advantage derived from the use of a weighted linkage supported by the base or carriage frame C is that different mold frames M may be readily applied to the same base frame C because the cam and roller connection 36, 37 lends itself to interchangeability of mold frames M. Because of the cam and roller connections 36, 37 it is quite easy to accuratel-y control the type of wing section bending action that is desired. Not only can the rocking lever support yokes 33 be adjusted on the pedestals 33, but the shape of the lever cam surfaces 36 can also be varied by simple machine shop procedures. The proven advantages of the pivot link supported wing section actuating linkages disclosed in the aforementioned Harvey J. Little patent application Serial No. 816,580 have been materially supplemented by the novel mold arrangement herein disclosed and claimed.

FIG. 6 shows a modified form of this invention wherein the lever pivot pin supporting yoke formation 33' is formed as an integral part of the mold center section end ltlc. While the yoke 33 is not adjustable on the pedestal 13 in this form of the invention, still, there can be other advantages from this arrangement because the wing section lever means 35 then moves with the frame rails 10 and there is no chance for relative distortion of the center and wing sections 10, 11, 12 due to movement of the rails 10 relative to the pedestals 13. As previously pointed out, the expansion slot connection between the bolt 31 and the oversize bore in which it is mounted, permits some limited movement between the mold ring R and the pedestals 13 of the carriage C.

I claim:

1. A ring-type glass bending mold comprising an intermediate fixed section and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed p0- sitions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a lever means at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the fixed mold section for vertical rocking movement, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means for the spaced wing sections, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and portion of the adjacent mold wing section.

2. A ring-type glass bending mold comprising an intermediate fixed section and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed positions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sec tions are in their closed mold positions, a lever means at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the fixed mold section for vertical rocking movement, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means for the spaced wing sections, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and portions of the adjacent mold wing section, said cam and follower means including a roller follower.

3. A ring-type glass bending mold comprising an intermediate fixed section and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed positions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a lever means at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the fixed mold section for vertical rocking movement, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means for the spaced wing sections, a weighted connector bar pivotally connected to and extending between the longitudinally spaced 'link means, and a cam and follower connection between the outwardly disposed end of each lever means and portions of the adjacent mold wing section, said cam and follower means including a roller follower engageable by line contact with a crowned cam surface.

4. A ring-type glass bending mold comprising a base frame supporting a sectionalized bending mold that includes an intermediate section fixed to said base frame and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed positions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, lever means at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the base frame for vertical rocking movement, link means pivotally con nected to and depending from the inwardly directed, opposed ends of the lever means for the spaced wing sections, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and portions of the adjacent mold wing section.

5. A ring-type glass bending mold comprising a base frame supporting a sectionalized bending mold that includes an intermediate section fixed to said base frame and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed positions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, lever means at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the base frame for vertical rocking movement, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means for the spaced wing sections, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and portions of the adjacent mold wing section, said mold intermediate section being fixed to said base frame by an expansion joint connection that permits limited relative movement therebetween.

6. In a ring-type glass bending mold comprising an intermediate fixed section and a pair of longitudinally curved, wing sections pivotally mounted on the opposite ends of said fixed section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open positions and elevated closed positions to form with said fixed section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a lever at each end of said fixed section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever pivotally supported intermediate its ends on the fixed section intermediate the lever end for vertical rocking movement about a horizontal, transversely extending pivot, a weighted connector bar pivotally connected to and extending between the longitudinally spaced levers, and a cam and follower connection between the outwardly disposed end of each lever means and the adjacent mold wing section.

7. A glass bending mold comprising a skeleton base frame having corner pedestals that support a ring-type shaping frame that includes an intermediate fixed section formed of a pair of transversely spaced side rails and a pair of longitudinally curved, substantially U-shaped wing sections pivotally mounted on the opposite ends of said intermediate section and arranged to swing about transvcrsely directed, horizontally extending pivot axes between depressed open mold positions and elevated closed mold positions to form with said intermediate section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a bell crank lever means at each end of said intermediate section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported on the adjacent base frame pedestal for vertical rocking movement, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and the adjacent mold wing section.

8. A glass bending mold comprising a skeleton base frame having corner pedestals that support a. ring-type shaping frame that includes an intermediate fixed section formed of a pair of transversely spaced side rails and a pair of longitudinally curved, substantially U-shaped wing sections pivotally mounted on the opposite ends of said intermediate section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open mold positions and elevated closed mold positions to form with said intermediate section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a bell crank lever means at each end of said inter-mediate section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the mold intermediate section for vertical rocking movement about a horizontal, transversely extending pivot, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means, a weighted connector bar pivotally connected to and extending between the longitudinally spaced link means, and a cam and follower connection between the outwardly disposed end of each lever means and the adjacent mold wing section.

9. A glass bending mold comprising a skeleton base from having corner pedestals that support a ring-type shaping frame that includes an intermediate fixed section formed of a pair of transversely spaced side rails and a pair of longitudinally curved, substantially U-shaped wing sections pivotally mounted on the opposite ends of said intermediate section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open mold positions and elevated closed mold positions to form with said intermediate section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a bell crank lever means at each end of said intermediate section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means pivotally supported intermediate its ends on the adjacent base frame pedestal for vertical rocking movement about a horizontal, transversely extending pivot, a weighted connector bar pivotally connected to and extending between the longitudinally spaced lever means, and a cam and follower connection between the outwardly disposed end of each lever means and the adjacent mold wing section.

10. A glass bending mold comprising a skeleton base frame having corner pedestals that support a ring-type shaping frame that includes an intermediate fixed section formed of a pair of transversely spaced side rails and a pair of longitudinally curved, substantially U-shaped wing sections pivotally mounted on the opposite ends of 7 said intermediate section and arranged to swing about transversely directed, horizontally extending pivot axes between depressed open mold positions and elevated closed mold positions to form with said intermediate section a longitudinally concave, ring-type, shaping surface when said wing sections are in their closed mold positions, a bell crank lever means at each end of said (intermediate section disconnected from the adjacent wing section and extending longitudinally of the mold with each lever means piivotal ly supported intermediate its ends on the adjacent base frame pedestal for vertical rocking movernent about a horizontal, transversely extending pivot, link means pivotally connected to and depending from the inwardly directed, opposed ends of the lever means, a

weighted connector bar pivotally connected to and extend- 15 ing between the longitudinally spaced link means, and a 5 crowned camrnin g surface on the associated lever means.

References Cited in the file of this patent UNITED STATES PATENTS 1,196,027 Riedel et al Aug. 29, 1916 2,827,738 McKelvey Mar. 25, 1958 2,882,646 Goligh-tly Apr. 21, 1959 FOREIGN PATENTS 768,484 Great Britain Feb. 20, 1957 839,229 Great Britain June 29, 1960 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent N00 3 115,403 December 24 1963 James P. Julio It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 4,, line 37 for "portion" read portions =5 column 6, line 419 for "f "r0m" read frame Signed and sealed this 9th day of June 1964 (SEAL) Attest:

ERNEST W. SWIDER Attesting Officer EDWARD J. BRENNER Commissioner of Patents

Claims

1. A RING-TYPE GLASS BENDING MOLD COMPRISING AN INTERMEDIATE FIXED SECTION AND A PAIR OF LONGITUDINALLY CURVED, WING SECTIONS PIVOTALLY MOUNTED ON THE OPPOSITE ENDS OF SAID FIXED SECTION AND ARRANGED TO SWING ABOUT TRANSVERSELY DIRECTED, HORIZONTALLY EXTENDING PIVOT AXES BETWEEN DEPRESSED OPEN POSITIONS AND ELEVATED CLOSED POSITIONS TO FOORM WITH SAID FIXED SECTION A LONGITUDINALLY CONCAVE, RING-TYPE, SHAPING SURFACE WHEN SAID WING SECTIONS ARE IN THEIR CLOSED MOLD POSITIONS, A LEVER MEANS AT EACH END OF SAID FIXED SECTION DISCONNECTED FROM THE ADJACENT WING SECTION AND EXTENDING LONGITUDINALLY OF THE MOLD WITH EACH LEVER MEANS PIVOTALLY SUPPORTED INTERMEDIATE ITS ENDS ON THE FIXED MOLD SECTION FOR VERTICAL ROCKING MOVEMENT, LINK MEANS PIVOTALLY CONNECTED TO AND DEPENDING FROM THE INWARDLY DIRECTED, OPPOSED ENDS OF THE LEVER MEANS FOR THE SPACED WING SECTIONS, A WEIGHED CONNECTOR BAR PIVOTALLY CONNECTED TO AND EXTENDING BETWEEN THE LONGITUDINALLY SPACED LINK MEANS, AND A CAM AND FOLLOWER CONNECTION BETWEEN THE OUTWARDLLY DISPOSED END OF EACH LAYER MEANS AND PROTION OF THE ADJACENT MOLD WING SECTION.