CN1092719A - Synchronously three-roller tractive, winding-up bag making machine - Google Patents

Abstract

Synchronously three-roller tractive, coiling type system are to improve to form on the basis of coiling type bag making machine with function of heat-seal followed by taking-off for machine.Two-stage fixed length haulage gear, cam mechanism and spooler constant speed are rotated synchronously.The swing film guiding mechanism is driven by the cam on the secondary fixed length haulage gear.Be provided with the feed subsidiary engine that a cover can be followed the tracks of film feeding in the upstream of prime fixed length haulage gear.This Bag Making Machine can be eliminated the effect of the tension of polybag when heat seal fully.Improved the heat sealing quality of polybag.

Description

Synchronously three-roller tractive, winding-up bag making machine

" synchronously three-roller tractive, winding-up bag making machine " of the present invention is a kind of plant equipment that is used to produce plastic packaging bag.

The patent No. 92110269.0 described " batching cutting, reciprocal heat-sealing bag making machine " and the primary structure of the patent No. 93102784.5 described " coiling type bag making machine with function of heat-seal followed by taking-off " are made up of following several mechanisms.Heat-fastening knife is packed on the body by elasticity.The force fit plate of heat seal plastic film is rotated in the heat device cam promotes up and down reciprocatingly to finish heat seal effect to plastic film jointly with heat-fastening knife.Rubber rollers and the fixed length roller that is pressed on the fixed length roller that float finished the traction of plastic film and the function of fixed length.The plastic film circumvolution of the takers-in that foam layer is being answered on the surface after with heat seal shut down after a certain selected number of layers, with once cutting off a retable pocket in the cutting groove of cutter on takers-in.Continuously the plastic film of carrying is clamped motionless following period of time by heat-fastening knife and force fit plate, continues traction, batches needed plastic film and lead the film frame by plastic film pulling swing and rotate and shortened defeated film path and compensate.The former heat device and swing are led the film chord position between haulage gear and spooler, and the latter lives in the upstream of haulage gear.A cover can adapt to heat device pressing at intermittence plastic film motion and the traction feeding machanism of follow feed more than the latter.In order to keep the stationarity for film, feeding machanism has adopted a tension fork to come the tensioner plastic film.The advantage of above-mentioned two kinds of inventions is: 1. adopted reciprocal laminating mechanism, the pressure when making the plastic film heat seal is big, thereby can process thicker plastic film.2. adopt traction, batch with the synchronous rotation mode of cam mechanism and fail film and heat seal, make plastic film when heat seal, not stop to transmit, continue to keep traction continuously and batch, thereby high efficiency.3. adopted the mode that cuts into bag after batching again with cutter, simplified cutting mechanism, and can process ultra-thin plastic films.4. do not need static eraser in the transport process of plastic film.Aforementioned invention also exists following some deficiency.1. the swing motive force of leading the film frame is the plastic film pulling in being transferred.Just left heat-fastening knife also fully the hot thread of cooling be subjected to the effect of tension, the plastic film at hot thread place can not be shunk and drawn thin.2. when heat-fastening knife and pressuring diaphragm firm moment that is separated from force fit plate, swing is led the film frame and quicken backswing suddenly under the spring force effect, make that static relatively tension fork quickens suddenly to move upward, its inertial acceleration power makes just to be left the plastic film that heat-fastening knife also is under the high temperature and very easily draws thin.3. the tension fork makes that along with the intermittent movement of heat device also always constantly moves up and down the drive motors switch is frequent, and motor is overheated burning easily.Requirement to the control circuit of control motor frequent start-stop is also very high-leveled and difficult.4. it is also influential with the even planarization that batches to the balanced steadily defeated film of haulage gear and spooler that the power of film frame swing is led in plastic film pulling swing, and regular meeting causes that fixed length is inaccurate.5. to promote heat-fastening knife and the pressuring diaphragm needed thrust that rises simultaneously bigger for force fit plate, requires the power of drive motors bigger.

The objective of the invention is problems and shortcomings, adopted the part original structure, and done the improvement that makes new advances and a kind of novel Bag Making Machine of designing at aforementioned dual mode Bag Making Machine existence.

The main technical schemes that the present invention adopts is as follows: at the belly of steel body motor and two-stage belt reducing gear are installed and drive cam rotation in the heat device.Cam promotion laminating mechanism pumps and heat-fastening knife is finished the heat seal effect to the plastic film that is clipped in therebetween jointly.Prime fixed length haulage gear is housed in the front portion of body.The top of body is equipped with the secondary fixed length haulage gear and foam plastics strip and the spooler that cuts frid is housed.Respectively adorn a sprocket wheel on prime fixed length roller and the takers-in.Respectively adorn two sprocket wheels on the axle of secondary fixed length roller and heat device dress cam.The number of teeth of these 6 sprocket wheels all equates.With three chains respectively with these sprocket engagement, make they etc. synchronization rotate.The girth of prime fixed length roller slightly is longer than 1 to 2 millimeter of the girth of secondary fixed length roller, makes the defeated film amount of prime must not be less than the defeated film amount of secondary traction.Heat device and swing are led the film frame and are arranged between prime haulage gear and the secondary haulage gear.Being packed in cam on the secondary fixed length roller promotes swing by push rod and leads the film frame and rotate.In order to make the plastic film supply balance steady, a feed subsidiary engine is set.Processed plastic film is placed on the support roller of subsidiary engine.Servomotor rotates by the belt drives carry-over pinch rolls, makes this roller and press superincumbent rubber rollers to draw plastic film jointly.The plastic film that one end is equipped with deflector roll and the tension rocker tensioner that can swing is carried forward is installed at subsidiary engine frame middle part.The extension spring of hanging on the change subsidiary engine frame and the coupled position of tension rocker can be adjusted the size of plastic film expanding force.So can make the prime haulage gear consistent with the defeated film ability of secondary haulage gear.

Advantage of the present invention is:

1, plastic film is in loose state fully when heat seal, after heat-fastening knife is separated from plastic film, the plastic film at hot thread place can fully freely cool off contraction in a period of time before entering the secondary haulage gear, make hot thread shrink and thicken, thereby improved the intensity of hot thread.

2, the always round-the-clock constant speed of prime fixed length roller is rotated, thus the feed rotating speed of feed subsidiary engine also can adjust at an easy rate evenly running continuously, reduced on-off frequency, the condition of work of feed servomotor is improved.

3, plastic film no longer spurs swing and leads the film frame and rotated, thereby, lead the steadily all even spooler uniformity of batching of defeated film that film frame rotatory force no longer influences the secondary haulage gear.Make every layer of hot thread of plastic film can as one man drop on the same point of takers-in.The polybag that cuts down the phenomenon that hot thread cuts away can not occur.

4, reduced by two pressuring diaphragms in the heat device, the power that makes cam promote force fit plate work has reduced, and has reduced the power consumption of drive motors.

Accompanying drawing 1 is a complete machine structure schematic diagram of the present invention.

Accompanying drawing 2 is heat device structural representations of the present invention.

Accompanying drawing 3 is secondary fixed length roller partial structurtes schematic diagrames of the present invention.

Provide details of the present invention below in conjunction with description to the embodiment of accompanying drawing.

Adorning motor 41 and belt pulley set 37 at steel body 36 bellies.Heat device 47 is affixed with the upper strata of body 36 by substrate 64.The belt pulley 70 of axle on 68 that is packed in the heat device 47 connects with belt pulley on the belt pulley set 37 by belt 45.Belt 38 connects with belt pulley on motor 41 and the belt pulley set 37 respectively.Prime fixed length roller 10 connects with the support 49 that is packed in body 36 front portions by the bearing block at its two ends.Adorning the deflector roll 48 that can rotate around self axle on the support 49.The support 15 that body 36 front upper install is installed with rocker 11 by bearing pin.The rubber rollers 12 that can rotate around self axle is being adorned at the middle part of rocker 11.Rubber roll 12 floating grounds are pressed in the upper surface of fixed length roller 10.Takers-in 33 in the spooler is installed in the upper strata at body 36 rear portions by the support of bearing 35 at two ends.The appearance face nailing of takers-in 33 the cutting frid of 3～4 foam plastics strips and an aluminum, and the nominal girth that it constituted is equal to or greater than 3～5 millimeters of secondary fixed length roller 31 girths.Fixed length roller 31 is packed in middle part, body 36 upper strata by the support of bearing 40 at its two ends.One end of the axle of fixed length roller 31 is installing two sprocket wheels 74,75 and cam 76.The two ends of the axle 68 of heat device 47 connect with substrate 64 by the support of bearing 72.Axle is installing on 68 and is installing cam 69, sprocket wheel 46,71 on protruding.The sprocket wheel 13 that installs on the sprocket wheel 34 that installs on the takers-in 33, the fixed length roller 10 all equates with the number of teeth of sprocket wheel 46,71,74,75.Chain 14 meshes with sprocket wheel 13,46 respectively.Chain 44 meshes with sprocket wheel 71,75 respectively.Chain 32 meshes with sprocket wheel 74,34 respectively.Thereby can make synchronization such as prime fixed length roller 10, cam 69, secondary fixed length roller 31 and takers-in 33 rotate.Installing support 39 between the support 35,40 on body 36 upper stratas.Support 39 tops connect with rocker 30 by bearing pin.The rubber rollers 27 that can rotate around self axle is being adorned at the middle part of rocker 30.The front of rocker 30 hangs the extension spring 25 that the lower end links to each other with body 36 upper stratas.Installing support plate 24 on support 40 front bodies 36 upper stratas.The middle part that film frame 43 is led in swing connects with support plate 24 by bearing pin.A deflector roll 22 and 42 that can rotate around self axle is respectively adorned at the two ends up and down of leading film frame 43.The middle and lower part of leading film frame 43 1 ends has strip hole.Kong Zhongyong bearing pin 21 connects with push rod 23.Strip hole on the push rod 23 is connecting the bearing pin 26 that is packed on the support plate 24, the guide effect that 26 push rods 23 of bearing pin seesaw.The other end of push rod 23 is installed with bearing 28 with bearing pin.One end of extension spring 29 hangs over leads on the film frame 43, and the other end hangs on the support 40, and its pulling force makes the bearing 28 on the push rod 24 always be pressed on the outline of the cam 76 on the fixed length roller 31.Two leads 55 in the heat device 47 are installed in the two ends of substrate 64.The two ends of dress cutter beam 59 are enclosed within on the lead 55.Spring 56 is enclosed within on the post 55 and is pressed on the dress cutter beam 59.Pressing above it and filling up 58 and nut 57, be used for adjusting heat seal and give tight power.Heat-fastening knife 61 usefulness bolts 60 connect with dress cutter beam 59.The upper surface of the force fit plate 63 below the heat-fastening knife 61 is pasting soft rubber pad 62.Adorning two bearings 65 in the prong of two fork-shaped push rods 67 adorning below the force fit plate 63.Under the gravity effect, the bearing stagnation pressure makes force fit plate along with the swing circle ground of cam 69 moves up and down on the outline of cam 69, and finishes heat seal effect to the plastic film during being clipped in interrupted the contacting of heat-fastening knife.Cam 76 should be in the orientation of installing on the secondary fixed length roller 31: when cam 69 continues when offset plate 62 on the force fit plate is contacted with heat-fastening knife 61, the outline of cam 76 makes push rod 23 begin to promote to lead film frame 43 and clockwise rotates, up to offset plate 62 and heat-fastening knife 61 glue after contacting, push rod 23 makes and leads film frame 43 beginning inhour rotation returns just toward swivel motion.Two damping frames 17 and 18 are contained in the both sides of body 36 upper strata heat devices 47 respectively. Damping spring 16,19 is packed in the upper surface of damping frame 17 and 18 respectively, is used for making the plastic film that is clipped between damping frame 17,18 and the spring 16,19 to carry and does not steadily fly to float.Be installed with at the upper right quarter of the feed subsidiary engine frame 52 of steel and watch floating motor 9, its underpart is being adorned carry-over pinch rolls 50 and the rubber rollers 6 that can rotate around self axle respectively by support 4,5.Rubber roll 6 usefulness are contained in the clamping force that bolt 7 on the support 5 is adjusted 50 of rubber roll 6 and carry-over pinch rolls.Belt 8 respectively with 9 in motor on carry-over pinch rolls 50 on belt pulley connect.One end of tension rocker 53 is equipped with the deflector roll 51 that can rotate around self axle, and the other end connects with frame 52 middle parts by bearing pin.The lower end of the extension spring 54 that frame 52 is hung above hangs on the rocker 53.Change the coupled position of extension spring 54 and rocker 53, can change the downward gravity size of tension rocker 53.The plastic film to be processed 1 that is sleeved on the rolling of wearing on the film bar 3 is placed on the wheel holding mechanism 2 on upper strata, frame 52 front.Plastic film 1 twines behind the rubber roll 6 again inhour clockwise and holds deflector roll downwards guide rubber roll 12 again into for 51 180 ° behind 50 90 ° of carry-over pinch rolls.Clockwise after 270 ° again inhour walk around fixed length roller 10, through deflector roll 48 turnover upwards, between damping frame 17 and damping spring 16, pass.After passing between heat-fastening knife 61 and the offset plate 62, between damping frame 18 and spring 19, pass again.Plastic film is guided rubber roll 27 into for 22 90 ° around deflector roll again after 90 ° below deflector roll 42, clockwise around 180 ° again the inhour on secondary fixed length roller 31 around 180 °.Another the enclosing the land of last lap winds up on takers-in 33.Traction and takers-in whenever turn around, the force fit plate 63 in the heat device up and down reciprocatingly once, plastic film heating that heat-fastening knife 61 and offset plate 62 will be therebetween and extruding once, make plastic film up and down two-layer heat seal finish the heat seal of a polybag thus and process to together.The intact plastic film 1 of heat seal is wound on the takers-in 33 after the fixed length of secondary haulage gear is carried layer upon layer.If batch layer when thickening, its girth can be greater than the next length of traction, plastic film between fixed length roller 31 takers-ins 33 produces pulling force thus, and this pulling force can force the foam plastics strip on the takers-in 33 to shrink, and makes takers-in 33 and 20 nominal girths always equal the girth of secondary carry-over pinch rolls 31.After reaching the selected number of turns, available cutter is manually axially cut off the polybag of selecting quantity in the cutting groove on takers-in 33.When heat-fastening knife 61 and offset plate 62 continue when beginning to clamp plastic film, cam 76 makes push rod 23 promote to lead film frame 43 and rotates.Shortened this moment defeated film path compensation the traction of continuous secondary fixed length and fixed length batch needed plastic film.When plastic film 1 was clamped by heat-fastening knife 61 and offset plate 62, swing was led power that film frame 43 rotates by plastic film 1 pulling, and the film frame 43 of leading that cam 76 drives excessively rotates, can make the length of failing the film path contraction be slightly larger than the length that the secondary fixed length is drawn required plastic film.Little unnecessary plastic film accumulates between heat-fastening knife 61 and damping frame 18.The plastic film that while prime carry-over pinch rolls 10 are sent here continuously also accumulates in the upstream of heat-fastening knife 61, promptly accumulates below deflector roll 48.Thereby the plastic film at heat-fastening knife 61 places is in lax state fully.Be not subjected to the effect of the tension of any during plastic film 1 heat seal at this moment.When heat seal finished, offset plate 62 was with after heat-fastening knife 61 separates, and the plastic film that accumulates below deflector roll 48 can satisfy second traction roller 31 and lead the needed plastic film amount of film frame 43 returns.Plastic film 1 when being sent to before the secondary haulage gear a period of time in, the hot thread under the condition of high temperature can be subjected to freely cooling off fully contraction.Thereby the hot thread part can shrink and thicken, and makes that the plastic film intensity at hot thread place is higher.The girth of prime fixed length roller 10 slightly is longer than 1 to 2 millimeter of the girth of secondary fixed length roller 31.The active force that rocker 30 is subjected to extension spring 25 is constant, and the plastic film of rubber roll 27 upstreams does not always have the tension of drawing of a bit.Thereby the ability of rubber roll 27 and 31 tractions of fixed length roller plastic film is invariable.Whenever the plastic film length that the traction of turning around is carried is always the same.The clamping force that rubber roll 12 is applied to the upper surface of fixed length roller 10 mainly is the gravity of rubber roll 12 itself and rocker 11.But the tension of rubber roll 12 upstream plastic films but can change by adjusting the position of extension spring 54 on rocker 53.If tension is bigger, the plastic film of traction can produce some slippages between rubber roll 12 and the fixed length roller 10 so, and the plastic film length that makes every circle traction carry has been lacked a bit.Otherwise the little plastic film of then carrying of slippage can lack little length a bit.Adjusting the position of extension spring 54 on tension rocker 53 can make the traction of prime fixed length haulage gear carry plastic film just to equal the plastic film amount that the traction of secondary fixed length haulage gear is carried.Because fixed length roller 10 always evenly rotates continuously with constant speed, thereby make feed carry-over pinch rolls 50 and rubber roll 6 that the servomotor in the feed subsidiary engine 9 can be adjusted at an easy rate draw for film continuously equably.Reduce the on-off frequency of servomotor, improved the duty of motor 9.

Claims (9)

1, synchronously three-roller tractive, winding-up bag making machine is a kind of plant equipment of producing plastic packaging bag, this equipment is made up of main auxiliary machine two parts, adopted the up-and-down reciprocating heat device, two-stage fixed length haulage gear, the spooler that can shrink automatically, can change the swing film guiding mechanism in defeated film path, and is furnished with the common plant equipment that constitutes of other subordinate mechanism, it is characterized in that: at the belly of steel body motor and two-stage belt reducing gear are installed and drive cam rotation in the heat device, at front part of a body prime fixed length haulage gear is housed, secondary fixed length haulage gear and spooler are equipped with in the upper strata of body, heat device and swing film guiding mechanism are between prime fixed length haulage gear and secondary fixed length haulage gear, and the feed subsidiary engine is positioned at the upstream position of prime fixed length haulage gear.

2, according to the Bag Making Machine described in the claim 1, it is characterized in that: respectively install a sprocket wheel on prime fixed length roller (10) and the takers-in (33), respectively installing two sprocket wheels on the axle of camshaft in the heat device (68) and secondary fixed length roller (31), the number of teeth of whole six sprocket wheels all equates, respectively with three chain engages.

3, according to the prime fixed length haulage gear described in the claim 1, it is characterized in that: rubber roll (12) floating ground is pressed in the upper surface of fixed length roller (10).

4, according to the secondary fixed length haulage gear described in the claim 1, it is characterized in that: rubber roll (27) floating ground is pressed in the upper surface of fixed length roller (31), and the front end that the rocker (30) of rubber roll (27) is installed hangs with the extension spring (25) that the other end connects with body (36).

5, according to the swing film guiding mechanism described in the claim 1, it is characterized in that: swing in the film guiding mechanism lead film frame (43) respectively adorn a deflector roll (22), (42) up and down, lead in the slotted hole on the film frame (43) with bearing pin and connect with push rod (23), the bearing (28) that the other end of push rod (23) is being adorned and secondary fixed length roller (31) spool on the cam (76) that installed contact.

6, according to prime fixed length roller described in the claim 2,3,4 and secondary fixed length roller, it is characterized in that: the girth of prime fixed length roller (10) is Duoed 1 to 2 millimeter than the girth of secondary fixed length roller (31).

7, according to the feed subsidiary engine described in the claim 1, it is characterized in that: the carry-over pinch rolls (50) that drive with servomotor (9) are housed on the frame (52), rubber roll (6) is pressed on the upper surface of carry-over pinch rolls (50), one end of tension rocker (53) connects with frame (52) with bearing pin, the other end that deflector roll (51) is housed is in free hang, and the other end of the extension spring (54) of hanging on the frame (52) hangs over the middle part of rocker (53).

8, according to the heat device described in the claim 1, it is characterized in that: the dress cutter beam (59) that heat-fastening knife (61) is installed is sleeved on the lead (55), the spring (56) that is contained on the lead (55) is pressed on the beam (59), the bearing (65) of force fit plate (63) on push rod (67) of heat-fastening knife (61) below contacts with cam (69), and the upper surface of force fit plate (63) posts rubber slab (62).

9, according to the spooler described in claim 1 and 2, it is characterized in that: the outer surface of takers-in (33) is equipped with three to four foam plastics strips and aluminum cutting frid, and the peripheral girth that they constituted is greater than 3～5 millimeters of the girths of secondary fixed length roller (31).

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