CN1411974A

CN1411974A - Blank conveying mechanism of plastic container forming machine

Info

Publication number: CN1411974A
Application number: CN 01136535
Authority: CN
Inventors: 徐光中
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-16
Filing date: 2001-10-16
Publication date: 2003-04-23

Abstract

The conveying mechanism of plastic container forming machine includes machine frame, holder, autorotation chain wheel and chain meshed with said autorotation chain wheel. It is characterized by that on its machine frame a guideway is fixed, the holder is supported on the guideway and can be moved on it, at the preheating mechanism place the holder can be closed to it, and at the die-closing mechanism place the holder can be spaced out central distance of die cavity, so that it has a forward separation mechanism with mobile separation slide block equipped with fixed shift fork and movable shift fork, and a positioning slide block for making holder retain its position and a positioning mechanism for making positioning shift fork retain its position.

Description

The parison conveying mechanism of plastic container forming machine

The present invention relates to the moulding of plastics, particularly make the device of hollow plastic container.

The prefabricated parison of existing usefulness is with stretch blow manufactured hollow plastic container (Coke bottle for example, mineral water bottle) shaped device, once can stretch blow one to several plastic bottles, on shaped device, prefabricated parison in each operation (as material loading, heating, matched moulds, stretch blow, blanking operation) mostly the conveying between is to adopt chain, is fixed with the parison clamper on it, under the clamper guide supporting is arranged, clamping has parison on the clamper, chain cycle operation and parison is delivered to each operation, this structure for conveying, because clamper is fixed on the chain, therefore its spacing is fixed, and desired spacing decides its spacing in the time of must be with bottle blowing, also carries out preheating with this big spacing when heating, the length of heater and the waste of the energy have been increased, make that also whole table apparatus size is huge, maintenance simultaneously is difficult for, and said clamper on chain need have guide supporting, so complex structure, the cost height.

The patent No. is 97221386.4, the Chinese patent that name is called " transmitting device of auto blow moulding machine " discloses a kind of chain and can fold, thereby when heating the parison spacing can dwindle technical scheme with energy savings, but still need chain, the folding special-purpose mechanism of a cover, the complex structure of also needing of chain.

The purpose of this invention is to provide a kind ofly without chain, the spacing of clamper can change, and is simple in structure, and cost is low, the parison conveying mechanism of the pulling and blowing formation machine for plastic containers of energy savings.

The objective of the invention is to realize by following technical scheme, the parison conveying mechanism of plastic container forming machine has frame, the parison clamper, have from rotary chain wheel on the parison clamper, with the rotation chain that is meshed from rotary chain wheel, support the rotation chain and drive the rotating sprocket and the electric rotating machine of its rotation, it is characterized in that also having the ring-shaped guide rail on the frame of being fixed on, that can walk on the guide rail is supported with said parison clamper, preheating procedure two adjacent clampers be abutted against mutually and by after the parison clamper promote the preceding that the parison clamper advances, also has the separating mechanism and when advancing separating mechanism disengaging parison clamper, make the parison clamper keep the detent mechanism of its position of advancing that makes adjacent parison clamper separate by mold cavity centre distance and make that the parison clamper advances in matched moulds stretch blow operation, the separating mechanism that advances is positioned at a side of the guide rail of matched moulds stretch blow operation, and detent mechanism is positioned at the opposite side of the guide rail of matched moulds stretch blow operation.

The structure of said ring-shaped guide rail, parison clamper, the separating mechanism that advances, detent mechanism can be;

Said ring-shaped guide rail has the interior guide rail of supporting surface in having of annular, and with the outer guide that has outer supporting surface of the equidistant annular of interior guide rail, the guided way equidistant with outer guide, guided way comprise equidistant vertical outer spigot surface and interior spigot surface;

Said parison clamper has body, there is the axle of through hole at rotating center in body, be fixed with on the axle said from rotary chain wheel, the outside of body have be supported in interior support wheel on the guide rail, be supported on outer support wheel on the outer guide rail and the directive wheel in guided way;

The said separating mechanism that advances has the separate slide rail parallel with the matched moulds stretch blow operation of ring-shaped guide rail, separate the cross sliding rail that the slide rail below has the separation slide rail to slide thereon perpendicular to ring-shaped guide rail, be fixed on moved end on the cross sliding rail and separate the cylinder of walking crosswise that slide rail links to each other, separating on the slide rail separation slide block that can parallel ring-shaped guide rail direction moves, the ring-shaped guide rail side of separation slide block is fixed with the shift fork of deciding with die cavity spacing equidistance, the base end of getting that separates slide block has and can separate the shift fork alive that slides on the slide block, shift fork alive and adjacent deciding have puller plate between shift fork, be fixed on and separate the moved end separation cylinder continuous on the slide rail, separate to be fixed with on the slide rail that the shift fork of living is positioned at the backstop of getting the base position with separating slide block;

Said detent mechanism has the positioning sliding block parallel with ring-shaped guide rail, the positioning slide that the below has positioning sliding block to slide thereon perpendicular to ring-shaped guide rail, be fixed on the positioning cylinder that the moved end links to each other with positioning sliding block on the positioning slide, the ring-shaped guide rail side of positioning sliding block is fixed with the location shift fork with die cavity spacing equidistance.

The parison conveying mechanism of plastic container forming machine of the present invention, adopting on the clamper has bogie wheel to be bearing on the guide rail, and there is directive wheel to make clamper along certain track travel and the position necessarily can't be rotated, the employing separation cylinder of advancing makes and separates that slide block moves back and forth and the clamper spacing of being abutted against mutually drawn back the spacing identical with stretch blow mould cavity spacing and deliver to the matched moulds stretch blow operation of guide rail, can stretch and blowing behind the matched moulds, separate slide block and also the clamper of the good bottle of blowing is moved forward to unloading part, and promote in the edge that clamper that a last circulation unloaded bottle is abutted against mutually, outer guide moves forward, thereby finished the transportation work of parison, the utility model does not need chain and complicated transmission mechanism, the spacing of clamper can change simultaneously, but before preheating section can little spacing and then energy savings, simultaneously simple in structure, cost is low.

Be described in detail below in conjunction with the parison conveying mechanism of drawings and Examples pulling and blowing formation machine for plastic containers of the present invention.

Fig. 1 is the top view structural representation of the parison conveying mechanism of pulling and blowing formation machine for plastic containers of the present invention;

Fig. 2 is the parison conveying mechanism of pulling and blowing formation machine for plastic containers of the present invention along the cross-sectional view of B-B face among Fig. 1 (dextrorotation turn 90 degrees make consistent with the installation site).

As Fig. 1,2, be depicted as the embodiment of two bottles of each blowing, the parison conveying mechanism of this plastic container forming machine has the frame 1 of forming machine, the parison conveying mechanism is housed on the frame 1, parison advance route along the parison conveying mechanism, the in-order feed mechanism 27 that is furnished with forming machine, preheating mechanism 28, closing drawing-blowing machine structure 17, shedding mechanism 24, in preheating mechanism 28, also have rotation chain 29, support the rotating sprocket 30 of rotation chain 29 and the spinning motor of its rotation of drive, they all can adopt prior art, no longer describe in detail, the parison clamper 7 that can migrate is arranged in the parison conveying mechanism, on the parison clamper parison 8 can be housed, when the clamper of sky is migrated, at first walk to feed mechanism 27 places, load onto parison 8, then the delivering to each mechanism of the order of the parison on it carried out preheating respectively, the stretch blow moulding and unload the bottle and finish a working cycles, said parison conveying mechanism comprises the ring-shaped guide rail 2 that is fixed on the frame 1, being supported on also can be along the parison clamper 7 of its walking on the guide rail 2, in preheating mechanism 28, adjacent clamper 7 is abutted against mutually, the separating mechanism 9 that advances that makes clamper 7 separate and clamper is advanced at closing drawing-blowing machine structure 17 places in addition, make clamper 7 at the constant detent mechanism 22 in holding position, closing drawing-blowing machine structure place, said guide rail 2 comprises the interior guide rail 3 of annular and the outer guide 4 of annular, and interior guide rail 3 and outer guide 4 parallel, and the two has equal spacing, the upper surface of interior guide rail 3 is interior supporting surface 49, the upper surface of outer guide is outer supporting surface 43, and outer guide 4 outsides have by vertical outer spigot surface 38 and vertical interior spigot surface 41 formed guided ways 5, (guided way 5 also can be located at interior guide rail 3 inboards), the annular of guided way should be with interior, spacing between outer guide is equidistant, said parison clamper 7 has body 34, and rotating axle 31 is arranged in the body 34, for example with bearing 46 axle is loaded in the body, the external diameter of axle 31 upper ends matches with the oral area internal diameter of the parison of institute stretch blow bottle and the parison cover can be carried thereon, also can have grip slipper 52 in axle 31 upper ends, be equipped with from rotary chain wheel or belt pulley 32 upper end of axle 31, and it is meshed with rotation chain 29 and makes parison produce rotation, parison clamper 7 is positioned at, in the spacing between outer guide and be used in the rotating bogie wheel that stretches out on the parison clamper, directive wheel is bearing on the guide rail and guiding, for example have on the outer bearing surface 43 of the inner bearing face 49 of guide rail 3 in being bearing in respectively by the internal support that stretches out on the body 34 wheel 50 and external support wheel 35 and outer guide 4, one of them should be two wheels said internal support wheel 50 or external support wheel 35, or in, the external support wheel is two wheels, so that clamper can not overturn, the directive wheel 39 of level also is housed on clamper body 34, and directive wheel 39 also should have two parallel being placed in the guided way 5 so that the clamper body can not rotate along its vertical axis, and directive wheel 39 comprises the rotating roller 40 that is loaded on the vertical shaft 37, the axis of guide 36 of fixing and linking to each other with vertical shaft with body 34, internal support wheel 50 comprise the internal trolley axle 47 that is connected in body 34 and on axle rotating internal trolley 48, external support wheel 35 comprise the outer roller shaft 44 that is connected in body 34 and on axle rotating outside roller 42, the clamper on ring-shaped guide rail, at last material process and preheating procedure place be abutted against mutually and promote the clamper of front and intermittently advance with the clamper of back, then its spacing need draw back the die cavity Center Gap distance that becomes big and mould with diameter after adapting to bottle blowing at matched moulds stretch blow operation and discharging operation place, and advancing of clamper also needs power, so also have advance separating mechanism 9 and make the constant detent mechanism in clamper holding position 22 when the separating mechanism 9 disengaging clampers that advance are got base of clamper, they are mutually internal, the outer guide symmetry is installed, for example one is in the inboard of interior outer guide, and another is in the outside of interior outer guide, Figure 1 shows that the separating mechanism 9 that advances is in the inboard, the separating mechanism 9 that advances comprises the separation slide rail 10 of the guide rail 2 that is parallel to matched moulds stretch blow operation place, separate slide rail 10 bottoms have level and perpendicular to the cross sliding rail 25 of guide rail 2, and be fixed on the cross sliding rail 25 moved end and separate the traversing cylinder 26 that slide block links to each other, it makes separates slide rail 10 can shift near or remove ring-shaped guide rail 2 on sideslip rail 25, separating in addition can be along separating the separation slide block 11 that slides on the slide rail length direction in the clamper side on the slide rail 10, separate on the slide block to guide rail 2 sides being fixed with the equidistant shift fork 15 of deciding, the die cavity center distance of the mould when its distance should be with two or more bottles of stretch blow is consistent, has shift fork 14 alive at the base end (promptly separate slide block and pitch a end into the clamper that is abutted against mutually) of getting that separates slide block 11, the shift fork 14 of living can separate slip on the

slide block

11,15 of the shift forks of deciding that the shift fork 11 of living is adjacent have puller plate 12 to link to each other, its effect be make shift fork 14 alive with adjacent decide shift fork 15 when getting base mutually by and draw back when the matched moulds section, when the shift fork 14 of living with adjacent when deciding shift fork 15 and leaning on mutually, the centre-to-centre spacing of the clamper that its centre-to-centre spacing should be abutted against with two-phase equates, and when the shift fork 14 of living with adjacent when decide shift fork and drawing back with puller plate 12 spacings, the centre-to-centre spacing of the clamper when its centre-to-centre spacing should be with matched moulds equates (equating with two adjacent centre-to-centre spacing of deciding shift fork 15), on separation slide rail 10 backstop 13 that can block shift fork 14 alive can be arranged, shift fork is parked in desired location accurately so that live, puller plate 12 can be a long slab, has slotted hole along its length, the shift fork and adjacently decide shift fork and be contained in this hole and limit spacing out of the two and equate with the centre distance of die cavity of living, said separation slide block 11 moves back and forth on the slide rail separating with separating that separation cylinder 23 that slide block links to each other drives by being fixed on the moved end of separating on the slide rail 10, also can adopt other walking mechanism, as the mechanical contact Rodless cylinder of the pneumatic company of Japan, said detent mechanism 22 has the positioning sliding block 18 that parallels with guide rail 2, the location traverse rod 19 that the below of positioning sliding block 18 has level to install perpendicular to guide rail 2, and have and be fixed on the traverse rod of location the positioning cylinder 20 that links to each other with positioning sliding block 18 of moved end and positioning sliding block 18 can be moved on the traverse rod 19 of location and shift near or remove guide rail 2, positioning sliding block 18 be fixed with equidistant location fork 21 to guide rail 2 sides, the die cavity spacing of its mould apart from should be with the stretch blow bottle time is consistent, its horizontal level should with decide shift fork 15 and stagger, quantity should equal the quantity of the clamper that closing drawing-blowing machine structure 17 to bottle discharging machine structure 24 migrated.

On the frame 1 of getting the base position, locating piece 16 is arranged so that will be located by the clamper that fork is got; there is back-moving spring (as Fig. 1) to make locating piece 16 be positioned at extended position on the locating piece 16 so that the clamper location; drive clamper when clamping moves when separating slide block 11; locating piece 16 can be sold to rotate for the center clamper is passed through; reset then, also can adopt the telescopic locating piece 16 that drives by cylinder.

The advance working procedure of separating mechanism and detent mechanism of clamper is as follows; when being parked in by locating piece 16 location, the clamper 7 that is abutted against mutually gets the base position; separate slide block 11 simultaneously and be positioned at the right-hand member of separation slide rail 10 (as the left side of Fig. 1; dextrad); separating slide rail 10 is in the front position and makes parison be in the matched moulds position; clamping 17 carries out the matched moulds stretch blow; positioning sliding block 18 is moved forward by positioning cylinder 20 actions behind the matched moulds; fork 21 forks in location are lived clamper to be made it and can not move; traversing cylinder 26 actions and making separate slide rail 10 and moves backward to make and decide shift fork 15 and left by the clamper of matched moulds; separation cylinder 23 action makes and separates slide block 11 station that moves to left; migration distance is the clamper distance of twice space out; the shift fork 14 of living this moment is subjected to backstop 13 effects and decides shift fork 15 and be abutted against mutually with adjacent; the clamper spacing of being abutted against mutually on its spacing and the guide rail 2 equates and aligns with it; 26 actions of traversing cylinder make and separate slide block 11 reaches and the shift fork 14 and adjacently decide shift fork 15 and pitch a clamper 7 of getting the base position respectively of living; separate simultaneously on the slide block 11 remaining decide 15 of shift forks respectively fork firmly blow the equidistant clamper on guide rail of good bottle; and location fork 21 moves the disengaging clamper after being driven by positioning cylinder 20; separation cylinder 23 action makes and separates slide block 11 station that moves to right; also promoting to decide the shift fork 15 later clampers that are abutted against mutually on guide rail simultaneously advances; the shift fork 14 of living is then run to adjacent by puller plate 12 pullings decides shift fork apart from the position that equals the die cavity distance; clamping carries out matched moulds and stretch blow then; positioning sliding block 18 advanced the clamper that firmly spaces out of fork and can carry out as above-mentioned working cycles this moment; make the clamper that blows good bottle finally move to shedding mechanism and carry out discharging and separate slide block 11; clamper after the discharging simultaneously is abutted against mutually with the clamper in its place ahead; the powered of separation cylinder 23 after clamper; and after the clamper clamper the preceding that promotes to be abutted against mutually advance; therefore two spacings of being abutted against mutually that at every turn move ahead finish the separation of clamper and the action that moves ahead.

Top at clamper 7 can have spacing flange 33, and it can be used for rigid bearing 46, and the diameter that changes flange can change the centre-to-centre spacing that clamper is abutted against.

The shift fork 14 of living is relevant with the quantity of each matched moulds stretch blow bottle with the quantity of deciding shift fork 15, the clamper that leaves some at matched moulds stretch blow and discharging inter process guarantees that running gets final product, when bottle of each stretch blow, the shift fork of living can be 4 with the quantity sum of deciding shift fork, when 4 bottles of each stretch blow, its quantity sum can be 10, and the quantity of location shift fork 21 can be with work, decide shift fork quantity sum equates.

The parison conveying mechanism of plastic container forming machine of the present invention; clamper is abutted against mutually at the heating arrangements place; distance is near; but energy savings, and at the clamping place, mutual distance is drawn back; become big spacing requirement and adapt to diameter; use inside and outside guide rail support clamper simultaneously, omitted chain, simple in structure.

Claims

1, a kind of parison conveying mechanism of plastic container forming machine, has frame (1), parison clamper (7), have on the parison clamper (7) from rotary chain wheel (32), with the rotation chain (29) that is meshed from rotary chain wheel, support the rotation chain and drive the rotating sprocket (30) and the electric rotating machine of its rotation, it is characterized in that also having the ring-shaped guide rail (2) on frame of being fixed on (1), that can walk on the guide rail (2) is supported with said parison clamper (7), preheating procedure two adjacent parison clampers (7) be abutted against mutually and by after the parison clamper promote the preceding that the parison clamper advances, also have and make adjacent parison clamper separate and make the separating mechanism that advances (9) that the parison clamper advances by mold cavity centre distance and when advancing separating mechanism disengaging parison clamper, make clamper keep the detent mechanism (22) of its position in matched moulds stretch blow operation, the separating mechanism (9) that advances is positioned at a side of the guide rail (2) of matched moulds stretch blow operation, and detent mechanism (22) is positioned at the opposite side of matched moulds stretch blow operation guide rail.

2, the parison conveying mechanism of plastic containers forming machine as claimed in claim 1 is characterized in that;

Said ring-shaped guide rail (2) has the interior guide rail (3) that has interior supporting surface (49) of annular, the outer guide that has outer supporting surface (43) (4) with the equidistant annular of interior guide rail, the annular guided way (5) equidistant with outer guide (4), guided way (5) comprise equidistant vertical outer spigot surface (38) and interior spigot surface (41);

Said parison clamper (7) has body (34), there is the axle (31) of through hole (45) at rotating center in body, be fixed with said on the axle from rotary chain wheel (32), there is the interior support wheel (50) that is supported on the interior guide rail (3) outside of body (34), is supported on outer support wheel (35) on the outer guide (4) and the directive wheel (39) in guided way (5);

The said separating mechanism that advances (9) has the separation slide rail (10) parallel with the matched moulds stretch blow operation of ring-shaped guide rail (2), separating slide rail (10) below has the separation slide rail (10) can be at the cross sliding rail perpendicular to ring-shaped guide rail (2) (25) of last slip, be fixed on the moved end traversing cylinder (26) continuous on the cross sliding rail with separating slide rail (10), separating on the slide rail (10) the separation slide block (11) that can parallel ring-shaped guide rail (2) direction moves, separate slide block (11) to ring-shaped guide rail (2) side be fixed with die cavity spacing equidistance decide shift fork (15), the base end of getting that separates slide block (11) has and can separate the shift fork alive (14) that slide block (11) upward slides, live shift fork (11) and adjacently decide that puller plate (12) is arranged between shift fork (15), be fixed on separation slide rail (10) and go up the moved end and separate the separation cylinder (23) that slide block (11) links to each other, separate to be fixed with on the slide rail (10) that the shift fork (14) of living is positioned at the backstop (13) of getting the base position;

Said detent mechanism (22) has the positioning sliding block (18) parallel with ring-shaped guide rail (2), the positioning slide perpendicular to ring-shaped guide rail (2) (19) that the below has positioning sliding block to slide thereon, be fixed on positioning slide (19) and go up the positioning cylinder (20) that the moved end links to each other with positioning sliding block (18), positioning sliding block (18) be fixed with location shift fork (21) with die cavity spacing equidistance to guide rail (2) side.

3, the parison conveying mechanism of plastic container forming machine as claimed in claim 1 or 2, the quantity sum that it is characterized in that said shift fork alive (14) and decide shift fork (15) is 4-10, and the quantity of location shift fork (21) and work shift fork (14) and the quantity sum of deciding shift fork (15) equate.

4, the parison conveying mechanism of plastic container forming machine as claimed in claim 1 or 2, its feature are levied and are that described clamper (7) also comprises the spacing flange (32) on the clamper body (34).

5, as the parison conveying mechanism of claim 1 or 3 described plastic container forming machines, it is characterized in that said in support wheel (50) comprise the internal trolley axle (47) that is fixed on the clamper body (34) and rotating internal trolley (48) on it, said outer support wheel (35) comprises the outer roller shaft (44) that is fixed on the clamper body (34) and rotating outer roller (42) on it, and said directive wheel (39) comprises the vertical shaft (36) that is fixed on the clamper body (34) and rotating roller (40) on it.

6, as the parison conveying mechanism of claim 2 or 5 described plastic container forming machines, it is characterized in that said interior support wheel (50) is one, said outer support wheel (35) is two, said directive wheel (39) is two.

7, the parison conveying mechanism of plastic container forming machine as claimed in claim 1 or 2, it is characterized in that be equipped with on the frame (1) limit said clamper (7) be parked in get the base position after when piece (16).