US3870499A - Apparatus for manufacturing solid double layer sheet glass - Google Patents

Apparatus for manufacturing solid double layer sheet glass Download PDF

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Publication number
US3870499A
US3870499A US444185A US44418574A US3870499A US 3870499 A US3870499 A US 3870499A US 444185 A US444185 A US 444185A US 44418574 A US44418574 A US 44418574A US 3870499 A US3870499 A US 3870499A
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Prior art keywords
guide track
height
pane
edges
sections
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Expired - Lifetime
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US444185A
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English (en)
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Otto Stehl
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Individual
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/24—Making hollow glass sheets or bricks
    • C03B23/245—Hollow glass sheets

Definitions

  • ABSTRACT I An apparatus is provided for manufacturing solid dou- Apphumm prmmy ble layer sheet glass by fusing together the longitudinal M111 1973 (wrmlmy 3314715 and transverse edges of single sheets drawn vertically through a tunnel oven, having a lower guide track to U-S- (ll 65/156, 65/160 upport and guide [he lower edges of [he 5hee[5 an v r r 4 uppgr vertically adjustable guide truck to guide [58] new of Search 65/587 160 upper edges of the sheets, and a fusing device which is vertically adjustable relative to sheet height and serves ⁇ 56] References cued to fuse the upper edges of the sheets.
  • the basic object of the present invention is to provide a device of the above-described type which permits the economical production of solid double layer sheet glass even in small batches and in fact even in individual sheets.
  • an upper guide track is subdivided into mutually independent, vertically adjustable portions or sections whose length in the direction of the production line substantially corresponds to the maximum length of individual sheets to be fused.
  • the section of the upper guide track lying in front of the tunnel oven entrance may be initially adjusted to a given initial sheet height.
  • this subsequent guide track section is brought to the same level as that of the guide track section lying at the tunnel oven entrance, whereupon the pair of single sheets may move into said first guide track section which is inside the tunnel oven.
  • the guide track section in front of the oven entrance may be again readjusted to accommodate individual sheets of possibly different height.
  • the individual sheets can be tranported out of the first guide track section (which is located in the heating station within the oven) into the second guide track section within the oven as soon as the latter guide track section (after the forwarding of the previous sheet which may have exhibited a different height) has been adjusted to the level of the sheet now inside the first guide track. section within the oven.
  • This mode of operation facilitates the processing of small batches or even individual double layer glass sheets in an economical manner, without having to stop the machine and interrupt production.
  • the individual guide track sections are automatically, vertically, adjustable dependent on respective sheet heights of individual glass sheets by means of respectivedrive mechanisms connected with each guide track section. It is at the same time advantageous that each guide track section be automatically height-adjustable dependent on the respective setting of the guide track section preceding it in forward sequence. It is further advantageous in accordance with the present invention that the individual guide track sections are controlled by sensing devices to determine relative height-adjustment of two subsequent guide track sections, and to equalize the adjustment of the guide track section next along the production line relative to that which preceded it. The sensing devices can be limit switches applied to vertical switching strips arranged in pairs relative to each other.
  • Said limit switches influence the drive mechanisms causing equalization of height-adjustment.
  • a particularly advantageous embodiment of the in vention as set forth above is characterized by a plurality of supporting frames arranged above the upper guide track and above the tunnel oven, by means of two spindle drives actuated by a drive motor independently height-adjustable relative to each other, and corresponding in their length substantially to the maximum length of the sheets which are to be fused. From said supporting frames there extend downwardly into the tunnel oven two guide support pins, to which the upper guide track segments are secured and supported. Each guide track segement is rigidly connected at one end thereof with one of the guide support pins, and at the other end with the other guide support pin in slidably track segment. In addition, a vertical switching strip movable relationship in the direction of the conveyer. 1
  • the guide track segments which, for example, consist of bracing tubes with attached guide rails secured to the two guide support pins.
  • the guide support pins (against which the guide track segments are hung) thermally lengthen or shorten during the height adjustment of the guide track segments (during height adjustment the portion of the guide support pins inside or outside the tunnel oven varies)
  • the relative position of the respective upper guide track segments with respect to the upper edge of each glass sheet is continually controlled.
  • the mode of operation of the aforesaid device is further improved if for every guide track segment a sensing device is provided to determine the position of each respective segment, the sensing device controlling the further advancement of the glass sheets in coordination with the means for the adaptation of height adjustment in neighboring guide track segments.
  • These sensing devices which are preferably in the form of air gates, feed signals to a central control unit indicating when a certain given guide track segment does not carry a glass sheet. This signal then initiates the height adjustment of the said guide track segment in such a way that said segment is adjusted to the level of the preceding segment which contains a sheet of determined height, whereupon subsequently the sheet or sheets which until then occupied the preceding guide track segment are further advanced into the properly height-adjusted and adapted guide track segment.
  • the fusing device for the fusing of the upper sheet edges is in the form of an automatically heightadjustable torch arm which adjusts relative to the height of each respective sheet. Coarse adjustment and fine adjustment for the height of the torch arm may also be provided at this juncture.
  • the coarse adjustment is preferably actuated in such a way that the torch arm is automatically height-adjustable dependent on the height adjustment of the neighboring, preceding guide may be connected to the torch arm, said switching strip being coordinated with limit switches which are hooked up with a corresponding switching strip of the guide track segment preceding said torch arm, and said limit switches serving to adapt the height adjustment of the torch arm to those of the preceding guide track segment.
  • FIG. 1 represents a longitudinal side elevation, partly in section, showing a portion of a tunnel oven in accordance with this invention with a continuous lower guide track and five upper guide track segments which are at varying levels;
  • FIG. 2 represents a side elevation of a portion of a typical upper guide track suspension shown in FIG. 1;
  • FIG. 3 represents a right end elevation of the guide track segment shown in FIG. 2, partly in section;
  • FIG. 4 represents an enlargement of a portion of FIG. 2, showing various positions-of a guide track in relation to glass sheet;
  • FIG. 5 represents a partial view of various positions of the upper torch arm with air gates connected to it for fine adjustment.
  • the apparatus of this invention comprises a tunnel oven designated overall by reference numeral 10, through which glass sheets 12 are guided on a lower guide track 14 consisting of rollers.
  • the upper edges of sheets 12 are guided in an upper guide track consisting of individual segments or stations which in their several entireties are generally designated at the top of FIG. 1 by reference numerals 16, 18, 20, 22 and 24.
  • Each of the guide track segments 16 through 24 consists, as may specifically be seen in FIGS. 1, 2 and 3 of a horizontal bracing tube 26 on which is mounted a guide strip 28 (consisting of three individual strips), which effectively provide two upper guide means for every individual sheet of the double layer sheet being manufactured.
  • Bracing tube 26 is braced against two guide support pins 30 and 32, so as to be rigidly connected with guide support pin 30, while on the other hand, slidably connected to the other guide support pin 32 to permit longitudinal movement of tube 26 with respect thereto and yet give vertical support for the tube.
  • Guide support pins 30 and 32 are braced and guided by a frame 34 which is arranged above the level of the cover of tunnel oven 10, while the individual guide support pins 30 and 32 are guided through corresponding sliding bearings 36 at frame 34.
  • the upper ends of guide support pins 30 and 32 connect respectively with a horizontal support frame 38 which may be elevated or lowered by means of both a drive motor 42 and two gears 44 which actuate vertical spindles 40 respectively.
  • each of the bracing tubes 26 is rigidly connected with guide support pin 30 as by means of screws or bolts 48. If bracing tube 26 should expand during heating in the direction indicated by the arrow (rightwards, in FIG. 2) then a corresponding displacement of bracing tube 26 for the compensation of this thermal expansion is made possible by the fact that bracing tube 26 is not rigidly connected with the second guide support pin 32, but slidably mounted relative to said guide support pin 32. This slidable mounting is made possible by rollers 50 (shown in FIG.
  • the preferred embodiment for height adjustment of the individual guide track segments 16-24 includes a coarse adjustment means for adjusting each guide track segment dependent on the setting of the preceeding guide track segment, as well as a means for fine adjustment of each guide track segment dependent on the setting of guide strips 28 relative to the upper edge of glass sheets 12.
  • the coarse adjustment of guide track segment 18 relative to guide track segment 16, for example, includes two limit switches 56 and 58 attached at the end of a switching strip 54 carried by one frame 38, said limit switches being acted upon by means of a switching strip 60 which actuates them directly and is connected with guide track segment 16 by means of the other frame 38. Similar devices are also provided between guide track segments of 18 and 20, and 22, 22 and 24, etc.
  • air gates 62 and 64 are employed, as shown in FIGS. 3 and 4.
  • Another air gate 66 is provided for determination of the occupancy status of each respective provided to fuse together the upper vertical sheet edges dependent on the position of guide track segment 20.
  • torch arm 68 is continuously adjusted by means of two limit switches 70 and 72 and a corresponding switching strip 74 at guide track segment 20, depending on the position of guide track segment 20, to achieve a coarse adjustment.
  • a fine adjustment is then obtained by means of two air gates 76 and 78 depending on the position of the upper glass sheet edge relative to burner nozzles 80 (FIG. 5).
  • Air gates 76 and 78 operate in a manner similar to airgates 62 and 64.
  • Drive motors 42 with gears 44 and spindles 40 (for the height adjustment of individual guide track segments), as well as the drive for the height adjustment of torch arm 68 are operationally connected with the several sensing devices 54, 56, 58, 60; 62, 64, 66; 70, 72, 74; 76, 78, and with the drive for the advancement of sheets 12 in forward direction through the oven by means of a central control unit, in such a way that the coarse adjustment, fine adjustment, and height adjustment of guide track segments 16 through 24 as well as of torch arm 68 and the forward advancement of the sheets is achieved after appropriate level-adjustment of the individual components.
  • guide track segment 16 (which is at the entrance to tunnel oven 10) has been adjusted to a height corresponding to the height of glass sheets 12 which are about to be fused together, the glass sheets are picked up by the guide means. As shown in FIG. 1, at this point in time there is no sheet left in guide track segment 18, so that the open air gate 66 signals that guide track segment 18 is unoccupied.
  • guide track segment 18 moves downwardly, following the signal emitted by open limit switch 56 which signals that guidetrack segment 18 is standing too high relative to guide track segment 16, causing segment 18 to move downwardly until both limit switches 56 and 58 are actuated by switching strip 60.
  • glass sheets 12 are moved ahead from guide track segment 16 into guide track segment 18.
  • air gate 66 signals that guide track segment 18 is loaded so that further sheet advancement is blocked.
  • the level of guide track segment 20, which is shown as set too low in FIG. 1, is adapted to the adjusted setting of guide track segment 18.
  • guide track segment 20 will travel upwardly until limit switches 56 and 58, in conjunction with switching strip 60, signal an equal level for guide track segments 18 and 20, so that the glass sheets (after a corresponding unloaded signal has been received from air gate 66 of guide track segment 20) may be advanced from guide track segment 18 into guide track segment 20.
  • support pins 30 and 32 of guide track segment 20 are withdrawn further out of tunnel oven 10, they contract, so that guide strips 28 stand too high in this segment in relationship to the upper edge of the glass sheets.
  • airgate 64 is opened, whereupon guide track segment 20 is lowered by means of drive motor 42 far enough to shut air gate 64 once more. The foregoing operations are successively repeated in all of the following guide track segments.
  • the upper torch arm 68 After the glass sheets have reached guide track segment 20 and thereby have reached the point of readiness for fusing, the upper torch arm 68 must be vertically adjusted so as to be at the correct height.
  • the actuated limit switch 70 causes torch arm 68 to travel upwardly until both limit switches 70 and 72 are actuated by means of switching strip 74.
  • the corresponding signal is delivered to the central control unit, then sheets 12 are moved forward into fusing position. Because the welding process requires a very precise setting of the upper torch arm 68 relative to the upper sheet edge, the coarse adjustment by means of limit switches 70 and 72 is followed by a fine adjustment by means of air gates 76 and 78. The precise relative positioning of the torch arm relative to the sheet edge is achieved if air gate 76 is opened and air gate 78 is interrupted.
  • Apparatus for the manufacture of all-glass double windowpanes by welding the longitudinal and transverse edges of single panes carried upright through a tunnel oven having a lower guide track for the support and guidance of the lower pane edges, a vertically adjustable upper guide track for the guidance of the upper pane edges, and fusing means that is adjustable in height according to the pane height for fusing the upper, horizontal pane edges, the upper guide track being divided into sections which are each automatically and vertically adjustable independently of one another by means of a driving device associated with each guide track section according to the height of the particular pane therein contained, the length of said sections in the conveying direction being substantially the same as the length of the individual panes to be fused together, each guide track section further having means for sensing the relative heights of any two adjacent guide track sections and for equalizing the vertical position of the guide track section next following in the direction of conveyance to that of the preceding one.
  • sensing means are limit switches arranged on vertical switching strips disposed and coordinated in tandem, the positioning of the limit switches regulating drive devices for vertical adjustment of the guide track sections.
  • a plurality of supporting frames are disposed above the guide track sections and above the tunnel oven, which are vertically adjustable independently of one another by a drive motor through two spindle drives each, which are elongated in the direction of conveyance of the panes, and which correspond in their length substantially to the maximum length of the panes to be fused, and from each of which two guide support pins extend downwardly into the tunnel oven, the upper guide track sections being fastened thereto.
  • a torch arm is provided for fusing together the upper pane edges, which is automatically and vertically adjustable in accordance with the particular pane height and there is associated with said torch arm a vertical control rail having limit switches which cooperate with a corresponding control rail of the guide track section preceding the torch arm for matching the height adjustment of the torch arm to that of the preceding guide track section.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Joining Of Glass To Other Materials (AREA)
US444185A 1973-03-24 1974-02-20 Apparatus for manufacturing solid double layer sheet glass Expired - Lifetime US3870499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2314715A DE2314715C3 (de) 1973-03-24 1973-03-24 Vorrichtung zur Herstellung von Ganzglasdoppelscheiben wechselnder Höhe durch Verschweißender Kanten innerhalb eines Tunnelofens

Publications (1)

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US3870499A true US3870499A (en) 1975-03-11

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US444185A Expired - Lifetime US3870499A (en) 1973-03-24 1974-02-20 Apparatus for manufacturing solid double layer sheet glass

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US (1) US3870499A (cs)
JP (1) JPS5722904B2 (cs)
AT (1) AT326288B (cs)
CA (1) CA1011557A (cs)
DE (1) DE2314715C3 (cs)
SE (1) SE402905B (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080110915A1 (en) * 2004-05-28 2008-05-15 Smith Steven L Method and Application For Applying Labels On Surfaces of Selected Surfaces of Varying Orientations
WO2012103741A1 (en) * 2011-01-31 2012-08-09 Luoyang Landglass Technology Co., Ltd. Device for continuously processing vacuum glass member
WO2014159163A1 (en) * 2013-03-14 2014-10-02 Southwall Technologies Inc. Assembling multiple glazing units comprising an internal plastic sheet by means of a tunnel oven having distinct temperature zones
CN108473355A (zh) * 2015-11-02 2018-08-31 玻璃技术公司 玻璃片模具设备和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103429A (en) * 1958-08-11 1963-09-10 kroger etal
US3205056A (en) * 1960-10-31 1965-09-07 Libbey Owens Ford Glass Co Method and apparatus for producing all-glass multiple sheet glazing units

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103429A (en) * 1958-08-11 1963-09-10 kroger etal
US3205056A (en) * 1960-10-31 1965-09-07 Libbey Owens Ford Glass Co Method and apparatus for producing all-glass multiple sheet glazing units

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080110915A1 (en) * 2004-05-28 2008-05-15 Smith Steven L Method and Application For Applying Labels On Surfaces of Selected Surfaces of Varying Orientations
US7442269B2 (en) 2004-05-28 2008-10-28 United Parcel Service Of America, Inc. Method and application for applying labels on surfaces of selected surfaces of varying orientations
WO2012103741A1 (en) * 2011-01-31 2012-08-09 Luoyang Landglass Technology Co., Ltd. Device for continuously processing vacuum glass member
US9073776B2 (en) 2011-01-31 2015-07-07 Luoyang Landglass Technology Co., Ltd Device for continuously processing vacuum glass member
WO2014159163A1 (en) * 2013-03-14 2014-10-02 Southwall Technologies Inc. Assembling multiple glazing units comprising an internal plastic sheet by means of a tunnel oven having distinct temperature zones
CN108473355A (zh) * 2015-11-02 2018-08-31 玻璃技术公司 玻璃片模具设备和方法
CN108473355B (zh) * 2015-11-02 2021-05-25 玻璃技术公司 玻璃片模具设备和方法

Also Published As

Publication number Publication date
AT326288B (de) 1975-12-10
SE402905B (sv) 1978-07-24
DE2314715C3 (de) 1975-10-02
JPS5722904B2 (cs) 1982-05-15
DE2314715A1 (de) 1974-10-03
DE2314715B2 (de) 1975-02-27
ATA31674A (de) 1975-02-15
CA1011557A (en) 1977-06-07
JPS49122521A (cs) 1974-11-22

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