CLOSING MECHANISM FOR THE MOLD HALVES OF AN I.S. MACHINE
20170121208 · 2017-05-04
Inventors
Cpc classification
C03B9/3875
CHEMISTRY; METALLURGY
C03B9/3816
CHEMISTRY; METALLURGY
C03B9/3891
CHEMISTRY; METALLURGY
C03B40/027
CHEMISTRY; METALLURGY
C03B9/3866
CHEMISTRY; METALLURGY
International classification
C03B9/353
CHEMISTRY; METALLURGY
C03B40/027
CHEMISTRY; METALLURGY
Abstract
The invention relates to a closing mechanism for the mold halves (5) of an I.S. machine, consisting of two yoke-like mold holders (3, 4) which are mounted on parallel guides (1, 2) and can be moved along said guides between a closed position and an open position by means of a drive. A spindle transmission (13) is provided laterally to the guide (1) so as to extend parallel to said guide, consisting of a threaded spindle that is connected to the drive via a transmission (15) and is in engagement with two threaded sleeves, each of which is connected to one of the two mold holders (3, 4), via two threaded sections running in opposite directions for the purpose of producing an opening or closing movement of the mold holders (3, 4). By means of the drive, a servomotor, the opening and closing movement of the mold holders (3, 4) is carried out. Two pneumatically actuated piston-cylinder units (22) are provided in order to apply the clamping force required between the mold holders (3, 4) or the mold halves (5) in the closed position, said units likewise being connected to the mold holders (3, 4) via an interposed toggle lever mechanism. A more structurally simple and reliable design is provided for the closing mechanism, said design also being free of thermal stresses on the basis of a coolant network integrated at least into the mold holders (3, 4).
Claims
1-26. (canceled)
27. A closing mechanism for the molds of an IS machine with two mold holders (3, 4; 27, 28) that can be displaced between an open and a closed position and are respectively designed for carrying at least one mold half (5, 29), and with at least one drive that is designed for displacing the mold holders (3, 4; 27, 28) between the aforementioned positions, wherein each mold holder (3, 4; 27, 28) is equipped with an integrated duct network designed for conveying a coolant, characterized in that the mold holders (3, 4; 27, 28) are realized in a yoke-like fashion, supported on linear guides (1, 2; 25, 26) extending parallel to one another on both sides and displaceable between the aforementioned positions, in that the two mold holders (3, 4; 27, 28) are connected to one another by means of at least one spindle gear (13, 36, 37) designed for generating a linear motion, in that the drive is coupled to this spindle gear, in that the spindle gear (13, 36, 37) used consists of a threaded spindle (38) that is connected to the drive and features two oppositely oriented thread sections (39, 40) that are respectively engaged with a threaded sleeve connected to a mold holder (3, 4; 27, 28), in that housings (74, 75) are realized in the form of parts of the machine base body of the IS machine and designed for at least accommodating the spindle gears (13, 36, 37), wherein the housings (74, 75) are connected to one another in a direction extending perpendicular to the guides (1, 2; 25, 26) by means of transverse structures (76, 77), and in that at least one network (78, 79) designed for conveying a coolant is arranged within the transverse structures (76, 77).
28. The closing mechanism according to claim 27, characterized in that the drive of the mold holders (3, 4; 27, 28) is realized in the form of an electric servomotor designed for generating the opening and closing motion, and in that at least one pneumatically actuated piston-cylinder unit (22) is provided for clamping together the mold holders in their closed position.
29. The closing mechanism according to claim 27, characterized in that an electric servomotor designed for generating the opening and closing motion of the mold holders (3, 4; 27, 28) is arranged on one side of the mold holders adjacent to one of the two guides (1, 2; 25, 26), and in that a pneumatically actuated piston-cylinder unit (22) designed for clamping together the mold holders in the closed position is respectively arranged on both sides of the mold holders.
30. The closing mechanism according to claim 28, characterized in that the or each piston-cylinder unit (22) is connected to the mold holders (3, 4; 27, 28) to be clamped together by means of a toggle lever mechanism (17).
31. The closing mechanism according to claim 27, characterized in that the drive of the mold holders (3, 4; 27, 28) is respectively realized in the form of an electric servomotor (45, 46) that is arranged laterally of the mold holders adjacent to the respective guide, wherein the servomotors are simultaneously designed for clamping together the mold holders in their closed position.
32. The closing mechanism according to claim 31, characterized by guides (104) between the mold holders (3, 4; 27, 28) and a machine base body in order to allow a stress-free operationally related thermal expansion of the mold holder (3, 4; 27, 28).
33. The closing mechanism according to claim 27, characterized in that an intermediate gear mechanism (15, 43, 44) is provided for the torque transmission from the drive to the spindle gear (13, 36, 37), in that the gear mechanism (15, 43, 44) is realized in the form of a cylindrical gear unit, and in that at least one of the gear wheels (70, 71) of the cylindrical gear unit consists of two dear discs (72, 73) that are rotatable relative to one another and can be fixed in the relative rotational position.
34. The closing mechanism according to claim 27, characterized in that the duct network for conveying a coolant is designed for cooling at least one mold half (5, 29).
35. The closing mechanism according to claim 27, characterized in that the cooling system formed by the duct network is at least partially realized in the form of a permanent cooling system.
36. The closing mechanism according to claim 27, characterized in that the flow of a coolant can be individually adjusted for at least some of the quarter segments of the mold halves (5, 29).
37. The closing mechanism according to claim 27, characterized in that the duct network for conveying a coolant is designed for cooling at least one neck shape.
38. The closing mechanism according to claim 27, characterized in that the network (78, 79) for conveying a coolant is respectively incorporated into a circuit that comprises at least a cooler (82, 83) and a pump (80, 81).
39. The closing mechanism according to claim 27, characterized in that two circuits are provided and respectively contain networks (78, 79) for conveying a coolant, wherein said circuits are respectively designed for at least cooling part of the transverse structures (76, 77).
40. The closing mechanism according to claim 27, characterized in that a lubricant supply in the form of a recirculating lubrication system is provided and realized in the form of a circuit that includes at least a cooler (86) and a pump (87).
41. The closing mechanism according to claim 40, characterized in that the guides (1, 2; 25, 26) are provided with outlet openings for a lubricant on their upper side.
42. The closing mechanism according to claim 27, characterized in that the housings (74, 75) are designed for accommodating the spindle gears (13, 36, 37), as well as the toggle lever mechanisms (17).
43. The closing mechanism according to claim 27, characterized in that the housings (74, 75) are designed for accommodating the gear mechanisms (15, 43, 44).
44. The closing mechanism according to claim 27, characterized in that the housings (74, 75) form part of the lubricant supply and are designed for realizing a lubricant bath, as well as an overflow for the lubricant.
45. The closing mechanism according to claim 27, characterized in that the housings (74, 75) are closed with cover segments that are slidably arranged on graphite seals and the interior of the housings can be acted upon with sealing air.
46. The closing mechanism according to claim 33, characterized in that a clamping connection between a servomotor (45, 46) and a gear mechanism (15, 43, 44) can be actuated without requiring a tool.
47. The closing mechanism according to claim 27, characterized in that an arrangement of vertical and horizontal guides is provided on each mold holder (3, 4) and for each mold half (5) such that an installation position for a mold half (5) is respectively defined, and in that at least one counter element designed for cooperating with this arrangement is provided on each mold half (5).
48. The closing mechanism according to claim 47, characterized in that the arrangement features contact elements (90, 91) that respectively form a lateral guide surface (93) and a horizontal contact surface, and in that the aforementioned counter element is realized in the form of a sliding block (94) arranged on the facing side of the mold half.
49. The closing mechanism according to claim 48, characterized in that shaped elements are integrally formed on the sliding block (94) and designed for being respectively supported on two contact elements (90, 91).
50. The closing mechanism according to claim 48, characterized in that a tensioning device is provided between the mold holder (3, 4) and the mold half (5) in order to generate tension between the mold half and the mold holder.
51. The closing mechanism according to claim 50, characterized in that the tensioning device consists of a displaceably arranged hook (99) that is designed for engaging behind a web (100) of the sliding block (94).
Description
[0028] The invention is described in greater detail below with reference to exemplary embodiments that are schematically illustrated in the drawings. In these drawings:
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[0053] The basic design of a first variation of an inventive closing mechanism is described below with reference to
[0054] These figures show two mold holders 3, 4 that are supported on spaced-apart guides 1, 2 extending parallel to one another and respectively designed for carrying four mold halves 5. The support is realized on base plates 6, 7, 8 and 9 that are slidably arranged on the guides 1, 2 by means of sliding carriages 10.
[0055] The reference symbols 11, 12 respectively identify mounting plates that are fastened on the base plates 6, 7 and extend away from the base plates in parallel planes. A spindle gear 13 with an axis 14 extending parallel to the guides 1, 2 is mounted on these mounting plates and designed for generating a linear motion of the base plates 6, 7 and consequently of the mold holders 3, 4 between an open position illustrated in the drawings and a closed position parallel to the axis 14. The spindle gear 13 may practically consists of two spindle drives with oppositely oriented threads.
[0056] The driving motion of the spindle gear 13 in the opening direction and in the closing direction of the mold halves 5 is generated by an electric servomotor that is not illustrated in the drawings and motively connected to the spindle gear 13 via a gear mechanism 15, wherein the axis of said servomotor extends parallel to the axis 14 of the spindle gear 13. Analogous to the two guides 1, 2, the servomotor and the gear mechanism 15 are arranged on a common machine frame of a glass forming machine that is likewise not illustrated in the drawings. The aforementioned servomotor is connected to the gear mechanism 15 that the location 16.
[0057] Two base plates 6-9 lying opposite of one another perpendicular to the guides 1, 2 are respectively connected by means of a toggle lever mechanism 17, wherein respective toggle levers 18, 19 are directly coupled to the base plates in a pivotable fashion and the ends of the toggle levers 18, 19 facing away from the base plates are coupled to the opposing ends of a connecting lever 20 that forms a toggle link, and wherein said connecting lever is centrally acted upon by the piston rod 21 of the piston-cylinder unit 22 in a direction extending perpendicular to a connecting line between the coupling points of the identically constructed toggle levers 18, 19.
[0058] The pneumatically actuatable piston-cylinder unit 22 mounted on the machine base body and the toggle lever mechanism 17 jointly form a drive unit 23 that is assigned to the guide 1 and designed for clamping together the mold holders 3, 4 and consequently the mold halves 5 in the closed position, wherein another identically constructed drive unit 24 is assigned to the guide 2.
[0059] The piston-cylinder units 23, 24 are always positioned centrally between the mold holders 3, 4 such that the symmetric design of the toggle lever mechanisms 17 of the two drive units 23, 24 referred to a vertical center axis makes it possible to generate correspondingly symmetric clamping forces.
[0060] In this first exemplary embodiment, the closing motion of the mold holders 3, 4 is realized with the drive assigned to the spindle gear 17 [sic], but the mold holders are clamped together pneumatically in cooperation with the two toggle lever mechanisms 17.
[0061] The basic design of a second variation of an inventive closing mechanism is described below with reference to
[0062] These figures show two spaced-apart guides 25, 26 that extend parallel to one another and on which two mold holders 27, 28 are slidably supported between an open position illustrated in the drawings and a closed position. The mold holders 27, 28 are designed in the form of carriers of mold halves 29 as described in greater detail below. The support of the mold holders 27, 28 is realized with an intermediate arrangement of base plates 31, 32 and 33, 34 that are assigned to each of the mold holders 27, 28 in pairs and slidably supported on the guides 25, 26 by means of intermediately arranged sliding carriages 35.
[0063] The two pairs of base plates 30, 31 and 32, 33 lying opposite of one another along the guides 25, 26 are respectively connected by means of spindle gears 36, 37, wherein each spindle gear 36, 37 consists of a threaded spindle 38 with two oppositely oriented thread sections 39, 40 that are respectively engaged with a threaded sleeve 41, 42 in order to thereby realize a motive connection designed for generating a symmetric opening and closing motion referred to a vertical center plane between the mold holders 27, 28. The threaded sleeves 41, 42 are mounted on the underside of the base plates 30, 31 and 32, 33 with respect to the transmission of axial forces in the sense of an opening and a closing motion of the mold holders 27, 28.
[0064] The opposing ends of the spindle gears 36, 37 respectively are motively connected to a servomotor 45, 46 via a gear mechanism 43, 44, wherein the mounting of these servomotors is described in greater detail below. Both servomotors 45, 46 are respectively coupled to the sides of the gear mechanisms 43, 44, which respectively lie opposite of the aforementioned ends of the spindle gears 36, 37, and extend parallel to the spindle gears 36, 37 underneath the plane defined by the two guides.
[0065] In this case, the closing motion of the mold holders 27, 28, as well as their clamping, is realized with the two servomotors 45, 46.
[0066] A cooling air system is described below with reference to the drawings illustrated in
[0067] On its side facing away from the mold halves 29, the mold holder 28 is provided with a number of duct elements that corresponds to the number of mold halves, in this case four duct elements 47 that are designed for conveying cooling air and connected to a compressed air source that is not illustrated in
[0068] On its end facing the mold holder 28, each duct element 47 ends in a hollow shaft 48 on the lower end of the mold holder, wherein an additional vertical duct 49 leads from said hollow shaft to a series of cooling ducts 55 within the mold half 29 via a first chamber 53 and an adjacent second chamber 54, and wherein the cooling ducts 55 are in the peripheral direction of the mold half 29 uniformly distributed along a circular line extending concentric to the axis thereof. Consequently, the chamber 54 fulfills a distribution function for the cooling air in order to thereby achieve a cooling effect that uniformly cools the volume of the mold half. The outlet openings of the cooling ducts 55 are located in the upper side of the mold half 29.
[0069] The reference symbol 56 identifies a control unit that is active in the chamber 53 and serves for controlling the flow of cooling air being conveyed through this chamber and therefore the cooling air flowing through the cooling ducts 55 in order to cool the mold halves 29. A not-shown drive is assigned to this control unit. For example, an individual adjustment of any or all quarter segments of the mold halves 29 can be realized by means of these control units 56.
[0070] The reference symbols 50, 51 identify additional chambers that follow one another in this sequence and end in an outlet element 52, from which a flow of cooling air is discharged in order to cool a neck shape of the hollow glass article being produced.
[0071] The reference symbol 57 identifies an additional hollow shaft, by means of which the end of the duct element lying opposite of the receptacle 48 is continuously connected to a duct 58, along which a shut-off valve 60 is arranged adjacent to a control valve 59.
[0072] The reference symbol 61 identifies a duct that is continuously connected to the chambers 50, 51 on its upper end in
[0073] The ends of the ducts 58, 61 lying opposite of the receptacle 57 and the chamber 50 are connected to a compressed air or cooling air source, wherein this connection is not illustrated in the drawings.
[0074] The connection of a servomotor 45, 46 to an intermediate gear mechanism 43, 44 is described below with reference to
[0075] This connection is constructively designed for respectively achieving a simple and fast installation or removal of the subassembly servomotor and is characterized by a clamping connection, in which an annular clamping body 62 with an axial gap can be tensioned and released by means of a clamping lever 63. For this purpose, the clamping lever 63 is functionally connected to a clamping screw 64 that peripherally extends toward the annular clamping body 62, wherein a frictional connection between a cylindrical housing body 65, which is connected to the housing of the assigned gear mechanism 43 by means of a flange 66, and the housing of the servomotor 45, which is connected to the annular clamping body 62, is produced in the clamped state. A handle 67 arranged on the housing of the servomotor 45 ensures comfortable handling during an installation or removal process.
[0076] Such an installation of a servomotor is equally suitable for use in both variations.
[0077] The reference symbol 68 identifies the electric terminal of the servomotor 45.
[0078] The connection between an output shaft of the servomotor 45 and a facing output shaft [sic] of the gear mechanism 43 may be realized, for example, in the form of a plug-type connection.
[0079] A gear mechanism 43, 44 according to
[0080] The gear mechanism 43 consists of a first gear wheel 69 that is motively connected to the output shaft of the servomotor 45 (
[0081] A cooling water circuit is described below with reference to
[0082] Temperature-related stress between the mold holders and the machine base body can thereby be prevented with a cooling air system according to
[0083] The guide 1 forms part of a lubricant circuit that includes the housing 74, wherein the lubricant is supplied via the guide 1, wherein the spindle gear 13, as well as the gear mechanism 15, is flooded with overflowing lubricant within the housing 74, and wherein an overflow 84 is provided, the position of which limits the lubricant level within the housing 74. The overflowing lubricant is conveyed back to the guide 1 via a filter 85, a cooler 86 and a pump 87 such that a closed circuit is formed.
[0084] The comparable lubricant circuit is provided for the guide 2.
[0085] Such a lubrication concept is equally suitable for use in the first and second variations of an inventive closing mechanism. Such a recirculation system eliminates an otherwise required loss lubrication and therefore contributes to an economical operation of a thusly equipped glass forming machine.
[0086] The lubricating and cooling concepts are likewise suitable for use in both variations.
[0087]
[0088] The reference symbols 88, 89, 90 identify three grooves, which vertically extend parallel to one another on the side of the mold holder 4 that faces the other, not-shown mold holder and on the upper end region of which cuboid contact elements 90, 91 are located both sides of the respective groove. These contact elements 90, 91 respectively form upper contact edges and lateral guide surfaces 93 for a sliding block 94 that in its upper section forms a T-profile, the base side of which adjoins the mold holder 4 that rests on the contact edges of the contact elements 91, 92 on both sides and is centered by the lateral guide surfaces 93. The base plane of the mold holder 4 forms the contact surface for the sliding block 94.
[0089] On its side facing away from the mold holder 4, the sliding block 94 forms a continuous, vertically extending web 95 that features a recess 96 in an approximately central region adjacent to the two contact elements 90, 91, wherein a tensioner 97, which is horizontally guided in a recess 98 of the mold holder 4 and features a hook 99 on its end facing the sliding block 94, protrudes into the aforementioned recess of the vertically extending web, and wherein said hook is designed for engaging behind a web 100 that defines the recess 96 on its side facing away from the mold half 5.
[0090] The sliding block 94 is connected to the mold half 5 by means of a not-shown connection such that both components can be unitarily handled as a subassembly during an exchange of a mold half.
[0091] The engagement of the hook 99 on the web 100 is prestressed by means of a spring 101, the tension of which can be adjusted with the aid of a cam 102 mounted in a bore 103 of the mold holder 4. The tensioner 97 can always be displaced between an installation position of the mold half, in which the hook 99 engages behind the web 100 in a tensioned fashion, and a removal position, in which the hook 99 can be respectively engaged with or disengaged from the web, by means of the cam 102 in connection with the spring 101.
[0092] The spring-loaded tensioner 97 and the sliding block 94 jointly form a quickly and easily actuatable clamping system. In the installation position, the mold half is always fixed on all sides.
[0093] The reference symbol 104 identifies a temperature sensor that is guided in a bore 105 of the tensioner 97 and contacts the mold half 5 with its free end in order to thereby measure the temperature thereof.
[0094] The dimensions of the recess 96, as well as the positions of the hook and of the web 100, are chosen such that the mold half 5 connected to the sliding block 94 can be fixed in its working position by inserting the hook 99 into the recess 96, namely by means of the cam 102. The mold half 5 is centered in the thusly achieved installation position shown.
REFERNCE LIST
[0095] 1 Guide [0096] 2 Guide [0097] 3 Mold holder [0098] 4 Mold holder [0099] 5 Mold half [0100] 6 Base plate [0101] 7 Base plate [0102] 8 Base plate [0103] 9 Base plate [0104] 10 Sliding carriage [0105] 11 Mounting plate [0106] 12 Mounting plate [0107] 13 Spindle gear [0108] 14 Axis [0109] 15 Gear mechanism [0110] 16 Location [0111] 17 Toggle lever mechanism [0112] 18 Toggle lever [0113] 19 Toggle lever [0114] 20 Connecting lever [0115] 21 Piston rod [0116] 22 Piston-cylinder unit [0117] 23 Drive unit [0118] 24 Drive unit [0119] 25 Guide [0120] 26 Guide [0121] 27 Mold holder [0122] 28 Mold holder [0123] 29 Mold half [0124] 30 Base plate [0125] 31 Base plate [0126] 32 Base plate [0127] 33 Base plate [0128] 34 Base plate [0129] 35 Sliding carriage [0130] 36 Spindle gear [0131] 37 Spindle gear [0132] 38 Threaded spindle [0133] 39 Thread section [0134] 40 Thread section [0135] 41 Threaded sleeve [0136] 42 Threaded sleeve [0137] 43 Gear mechanism [0138] 44 Gear mechanism [0139] 45 Servomotor [0140] 46 Servomotor [0141] 47 Duct element [0142] 48 Shaft [0143] 49 Duct [0144] 50 Chamber [0145] 51 Chamber [0146] 52 Outlet element [0147] 53 Chamber [0148] 54 Chamber [0149] 55 Cooling duct [0150] 56 Control unit [0151] 57 Shaft [0152] 58 Duct [0153] 59 Control valve [0154] 60 Shut-off valve [0155] 61 Duct [0156] 62 Annular clamping body [0157] 63 Clamping lever [0158] 64 Clamping screw [0159] 65 Housing body [0160] 66 Flange [0161] 67 Handle [0162] 68 Terminal [0163] 69 Gear wheel [0164] 70 Gear wheel [0165] 71 Gear wheel [0166] 72 Gear disk [0167] 73 Gear disk [0168] 74 Housing [0169] 75 Housing [0170] 76 Transverse structure [0171] 77 Transverse structure [0172] 78 Network [0173] 79 Network [0174] 80 Pump [0175] 81 Pump [0176] 82 Cooler [0177] 83 Cooler [0178] 84 Overflow [0179] 85 Filter [0180] 86 Cooler [0181] 87 Pump [0182] 88 Groove [0183] 89 Groove [0184] 90 Groove [0185] 91 Contact element [0186] 92 Contact element [0187] 93 Guide surface [0188] 94 Sliding block [0189] 95 Web [0190] 96 Recess [0191] 97 Tensioner [0192] 98 Recess [0193] 99 Hook [0194] 100 Web [0195] 101 Spring [0196] 102 Cam [0197] 103 Bore