EP0553144A1 - Appareil de cisaillement rectiligne de paraisons - Google Patents

Appareil de cisaillement rectiligne de paraisons

Info

Publication number
EP0553144A1
EP0553144A1 EP91917676A EP91917676A EP0553144A1 EP 0553144 A1 EP0553144 A1 EP 0553144A1 EP 91917676 A EP91917676 A EP 91917676A EP 91917676 A EP91917676 A EP 91917676A EP 0553144 A1 EP0553144 A1 EP 0553144A1
Authority
EP
European Patent Office
Prior art keywords
carriage
support arm
carriages
sleeve
gob
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.)
Withdrawn
Application number
EP91917676A
Other languages
German (de)
English (en)
Inventor
Lars Tore Anderson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BH-F(ENGINEERING) Ltd
Original Assignee
BH-F(ENGINEERING) Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BH-F(ENGINEERING) Ltd filed Critical BH-F(ENGINEERING) Ltd
Publication of EP0553144A1 publication Critical patent/EP0553144A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/10—Cutting-off or severing the glass flow with the aid of knives or scissors or non-contacting cutting means, e.g. a gas jet; Construction of the blades used

Definitions

  • This invention relates to straight line gob shearing apparatus.
  • the glassware is formed from gobs of molten glass.
  • gobs of molten glass. These glass gobs are obtained by forcing molten glass through an orifice in the floor of a refractory trough containing the molten glass from a glass furnace. The glass is forced through the orifice by means of an axially reciprocating plunger above the orifice. Below the orifice the gob is cut off and drops away. The glass gob, whilst still hot, then undergoes further treatment, e.g. moulding into the desired glassware.
  • the gobs are cut off by means of shears mounted below the orifice in the refractory trough.
  • shears mounted below the orifice in the refractory trough.
  • at least two opposing shear blades are reciprocally moved along a straight line towards and away from each other between the closed, cutting position, in which the gob is cut off below the orifice, and the open position to allow formation of the next gob.
  • a plurality of opposing shear blades is mounted in parallel such that a plurality of gobs may be sheared simultaneously.
  • Such straight line shearing apparatus is for example is described in European Patent Application 0 164 902.
  • the opposing shear blades are mounted on carriages which extend between parallel wayrods, each carriage carrying at least one shear blade.
  • the carriages are slidably mounted on the wayrods and reciprocally driven between the closed, cutting position and the open position.
  • one shear blade carriage is slidably mounted and driven reciprocally on one or more wayrods on one side of the apparatus and rests on a second wayrod, and the second shear blade carriage is slidably reciprocally driven on the second wayrod and rests on the first wayrod.
  • this construction is convenient for ease of operation and minimising friction on the wayrods, it does lead to differential wear, particularly at the high speeds and high temperatures of modern glass gob producing apparatus. Also the high temperatures have a tendency to result in differential expansion of the shear blade carriages. Both of these effects can lead to distortion, resulting in the shear blades becoming skewed with respect to each other, and thus in inefficient shearing of the gobs.
  • a straight line gob-shearing apparatus comprising a pair of carriages reciprocally movable toward and away from one another on parallel wayrods for carrying at least one pair of co-acting shear blades, wherein each carriage is supported slidably at one side on one or more wayrods and in parallel sliding fashion on its other side on an axial projection fixed to the other carriage.
  • the axial projection is a sleeve surrounding the wayrod on which the one side of the other carriage is slidably mounted.
  • each shear blade carriage while being slidably mounted on one side on wayrod(s) on the other side is slidably mounted on a projection of the other shear blade carriage. This has the effect that differential wear and differential expansion of the shear blades is compensated for.
  • Figure 1 is a plan view, with part cut away, of a straight line gob-shearing apparatus according to the present invention.
  • Figure 2 is a section on the line A-A of Figure 1;
  • Figure 3 is a plan view of a modified shear blade carriage of the present invention.
  • Figure 4 is a section on line IV-IV of Figure 3, showing a dual pad support arm, and
  • Figure 5 is a section on line V-V of Figure 3, showing a support arm terminal guide.
  • apparatus having two pairs of opposing shear blades for use in a double-gob installation.
  • the apparatus may be used in single-gob installations requiring only one pair of opposing shear blades or, using more pairs of shear blades, in triple etc. gob installations.
  • the apparatus comprises parallel wayrods 1 and 2 extending between one end plate 3 and a housing (not shown) .
  • Opposing shear blade carriages 7 and 8 extend between parallel wayrods 1 and 2 and have mounted webs 25 thereof opposing shear blade pairs 9 and 10, and 11 and 12.
  • the position, in use of the apparatus, of gobs between the shear blades is indicated in Figure 1 in feint line.
  • Shear blade carriage 8 is slidably mounted on wayrod 1 by means of sleeve 15.
  • the sleeve 15 is provided, at each end, with bushes 16 which slide on the wayrod 1.
  • Pivotally connected to sleeve 15, by means of pivot pin 18, is a connecting rod 19 connected to reciprocal drive means (not shown) whereby sleeve 15 and shear blade carriage 8 are reciprocally driven on wayrod 1.
  • shear blade carriage 7 is provided with a sleeve 21 which is slidably mounted on wayrod 2. Also, in analogous fashion to sleeve 15, sleeve 21 is provided with a pivot pin and connecting rod to reciprocal drive means (not shown) whereby sleeve 21 and shear blade carriage 7 may be reciprocally driven on wayrod 2.
  • the drives provided are such that the shear blade carriages 7 and 8 are moved towards each other on wayrods 1 and 2 to advance the opposing shear blade pairs 9 and 10 and 11 and 12 to the closed cutting position, and away from each other to the open position.
  • a longitudinal slide-way 22 (e.g. a hard metal wear plate) on which rests a support arm 23 projecting from the web 25 of shear blade carriage 8.
  • the underside of arm 23 is provided with a wear pad 26, for example a metal wear pad (shown in Figure 2).
  • a support arm 25 having a wear pad 26 and projecting from shear blade carriage 7 rests on a longitudinal slide-way 22 mounted on the upper side of sleeve 15.
  • the shear blades With the extrusion of a gob to between the opposing shear blades, the shear blades are moved from their open position (as shown in Figures 1 and 2) , by means of the drive means acting on the connecting rods 19 connected to sleeves 15 and 21, which slide on their respective wayrods 1 and 2 to their closed, cutting position. The shear blades are thereafter retracted to the open position ready for formation of the next gobs.
  • the arm 25 will move back to the left on plate 22 of sleeve 15, and the arm 23 will move to the right on plate 22 of sleeve 21.
  • each shear blade carriage is supported, on one side, on the sleeve slidably mounted on its respective wayrod, and on the other side on the sleeve on which the other shear blade carriage is supported.
  • wear effects are evened out.
  • the construction is substantially insensitive to heat expansion as each shear blade carriage is supported by, and moves on, a plate provided on the other shear blade carriage.
  • each longer arm of the carriage has a support block 28 secured to one end of slide-way 22 by means of screws 30.
  • the screws hold a guide plate 32 on block 28 in cantilever fashion.
  • the shorter support arm 25 of each carriage carries a low- friction pad 34 on its upper (as viewed) surface, to complement pad 26 on its lower surface.
  • the height of block 28 is substantially equal to the distance between the contact surfaces of pads 26 and 34.
  • each arm 25 into the space 36 is facilitated by a bevel 38 on the respective edge of plate 32, to accommodate any misalignment or vibration there might be between the shear blade carriages as the shear blades 9-12 ( Figure 1) encounter and shear through the protruding gobs.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Shearing Machines (AREA)

Abstract

Un appareil de cisaillement rectiligne de paraisons pour une installation de préparation de paraisons comporte deux charriots (7, 8) à lames de cisaillement entraînées réciproquement, munis de lames de cisaillement (9, 10, 11, 12) montées sur des tiges de transport (1, 2). Chaque chariot (7, 8) est monté directement sur une tige de transport (1 ou 2) et monté indirectement sur l'autre tige de transport au moyen de l'autre chariot (7 ou 8). Cette disposition permet une autocompensation tenant compte de l'usure et de l'expansion inégales normalement rencontrées à des températures élevées dans des appareils modernes de formation de paraisons.
EP91917676A 1990-10-05 1991-10-04 Appareil de cisaillement rectiligne de paraisons Withdrawn EP0553144A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909021682A GB9021682D0 (en) 1990-10-05 1990-10-05 Straight line gob shearing apparatus
GB9021682 1990-10-05

Publications (1)

Publication Number Publication Date
EP0553144A1 true EP0553144A1 (fr) 1993-08-04

Family

ID=10683288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91917676A Withdrawn EP0553144A1 (fr) 1990-10-05 1991-10-04 Appareil de cisaillement rectiligne de paraisons

Country Status (6)

Country Link
EP (1) EP0553144A1 (fr)
AU (1) AU8635891A (fr)
CS (1) CS303491A3 (fr)
GB (1) GB9021682D0 (fr)
WO (1) WO1992006045A1 (fr)
ZA (1) ZA917943B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5942597A (en) * 1995-08-21 1999-08-24 The Procter & Gamble Company Solvent extraction of polyhydroxyalkanoates from biomass
KR100342902B1 (ko) * 1994-01-28 2002-08-22 더 프록터 앤드 갬블 캄파니 생분해성공중합체및생분해성공중합체를함유하는플라스틱제품

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8412249D0 (en) * 1984-05-14 1984-06-20 Bhf Eng Ltd Straight-line shearing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9206045A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100342902B1 (ko) * 1994-01-28 2002-08-22 더 프록터 앤드 갬블 캄파니 생분해성공중합체및생분해성공중합체를함유하는플라스틱제품
US5942597A (en) * 1995-08-21 1999-08-24 The Procter & Gamble Company Solvent extraction of polyhydroxyalkanoates from biomass

Also Published As

Publication number Publication date
GB9021682D0 (en) 1990-11-21
CS303491A3 (en) 1992-05-13
WO1992006045A1 (fr) 1992-04-16
ZA917943B (en) 1992-06-24
AU8635891A (en) 1992-04-28

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