CN1083376C - Method and machine for overwrapping products in sheets of thermoplastic material - Google Patents
Method and machine for overwrapping products in sheets of thermoplastic material Download PDFInfo
- Publication number
- CN1083376C CN1083376C CN97109966A CN97109966A CN1083376C CN 1083376 C CN1083376 C CN 1083376C CN 97109966 A CN97109966 A CN 97109966A CN 97109966 A CN97109966 A CN 97109966A CN 1083376 C CN1083376 C CN 1083376C
- Authority
- CN
- China
- Prior art keywords
- sheet material
- product
- along
- path
- interlude
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012815 thermoplastic material Substances 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 37
- 238000012856 packing Methods 0.000 claims description 24
- 238000004806 packaging method and process Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 229920000298 Cellophane Polymers 0.000 description 6
- 230000002950 deficient Effects 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920006352 transparent thermoplastic Polymers 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000005144 thermotropism Effects 0.000 description 1
- 235000019505 tobacco product Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
- B65B11/28—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets
- B65B11/30—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about contents
- B65B11/32—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a curved path, e.g. on rotary tables or turrets to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
Abstract
A method and machine for overwrapping products in sheets of thermoplastic material, whereby each product is fed continuously, together with a respective sheet of overwrapping material, along a given path, an initial portion of which is a folding portion along which the sheet is folded about the product, a final portion of which is a stabilizing and heat-sealing portion along which the sheet is stabilized in the folded configuration, and an intermediate portion of which is a preheating portion along which the sheet is at least partly preheated to a temperature close to a softening temperature.
Description
The present invention relates to a kind of method with thermoplastic material external packing product.
With regard to the use the present invention in tobacco industry is beneficial especially, and especially in the use mechanically with the cellophane tobacco product, this is illustrated at the following description book by embodiment fully.
On the cellophane overwrapping machine, the product of parcel one by one or carton form and corresponding one connect one transparent thermoplastic plastic sheet of packing meterial, are generally polypropylene and are fed to packaging wheel, on packaging wheel, every sheet wrapped in around the corresponding product and form packing, form to the packing of small part lap by each sheet material; The packing that will so form is formalized by the said lap of heat sealing then.
On known cellophane overwrapping machine, the heat sealing step of setting packing (is normally undertaken by the time that makes the elevated temperature heat sealing device contact one section specified length with the lap of sheet material,) presenting more defective, this mainly is because the heat sealing matching requirements of expection is inconsistent.That is, in order to guarantee the desirable heat sealing under the highest operating speed of cellophane overwrapping machine, it is high as much as possible that the temperature of heat sealing device must keep, and preferably just in time is lower than the fusing point of thermoplastic material, and heat sealing sheet material as quickly as possible.Otherwise because certain reason and than low-speed handing the time, in this case, heat sealing device and sheet material will keep long contact time when machinery, the softening point that temperature is higher than material just be more suitably in case prevent sheet material burn or curling.
On some known cellophane overwrapping machine, the heat sealing device is set to temperature just on the softening point of sheet material, product is admitted to along long path with corresponding packing, the length in path is such even also can guarantees the heat sealing of good quality under the highest operating speed, meanwhile do not burning or damaging setting packing under the situation of sheet material danger, because the lower temperature of heat sealing device, be lowered at the output speed of this occasion machinery.
Yet above-mentioned terms of settlement is owing to require using large-sized conveyer to present the further defective of itself, so that causes the increase and the mechanical transport problem of mechanical overall dimensions.
The purpose of this invention is to provide a kind of predetermined method that overcomes the external packing product of above-mentioned defective.
According to the invention provides a kind of method with thermoplastic material's external packing product, this method may further comprise the steps: along prescribed path product is sent into continuously with corresponding housing material sheet; Give sheet material with the shape that is folded along the initial segment in said path around product; The shape that by heat sealing the sheet material setting is being folded along the back segment in said path; It is characterized in that also comprising other step: be preheating to temperature near the softening point of said material along the sheet material of the near small part of interlude in said path.
By making the packing that are fed to the heat sealing device be in very approaching but still be lower than the temperature of its softening point, above-mentioned method provides very fast speed heat sealing, even it is also like this at the heat sealing device that uses lower temperature, and (packing material adheres to corresponding conveyer to eliminate any defective that is caused by the softening too early of external packing sheet material, tearing of sheet of packing meterial, or the like).
The invention still further relates to a kind of machinery of using with thermoplastic material's external packing product.
According to the present invention, the conveyer that provides a kind of mechanical said machinery of using with thermoplastic material's external packing product to comprise to send into continuously along the path of regulation product and corresponding sheet of packing meterial to use, said conveyer comprise initial segment and back segment; Give sheet material with the folding device that shape is used that is folded around product; And the heat sealing device that is positioned at said back segment and the sheet material setting is used in the shape that is folded; It is characterized in that said conveyer also comprises interlude; And along said interlude heating arrangement is installed and is arrived the sinter point of temperature near said material with the sheet material that is preheated to small part.
Nonrestrictive embodiment of the present invention also is illustrated in down with reference to the accompanying drawings by embodiment, wherein:
Fig. 1 is the diagrammatic side view according to the machinery of the preferred embodiments of the invention, some in addition part represent with section and some in addition part for the sake of clarity be omitted;
Fig. 2 is the planar view of Fig. 1 machinery.
When stopping at load station 8, each groove 6 is accepted simultaneously by each transparent packaging material sheet 3 of known feeding mechanism (not shown) supply and the parcel of being supplied by known feeding mechanism (not shown) 2, and feeding mechanism inserts parcel 2 in known manner and consequently sheet material 3 become U-shaped in parcel 2 folded around with each sheet material 3 in groove 6.
In load station 8 with at the stopping period of station 8 next step forward, be folded or the end of the sheet material 3 of U-shaped by known folding device 9a that move and fixing and 9b is engaged and one foldedly to another above, form tubular packaging element 10, its end opposite of opening wide is given prominence to from the axial open end of each groove 6.
Each groove 6 infeeds each parcel 2 and each packaging element 10, the single-piece group that each parcel 2 and each packing 10 form shown in 11, through being at least the heat sealing station 12 at a place (in an embodiment, station 12 has two places), stop so that each known external shaft thermotropism sealing device 13 contact and quilt heat sealing fully before group 11 reaches unloading station 14 with the overlapping ends of packaging element 10 in each group 11 of heat sealing station 12 places.
Except taking turns 5, output 4 also comprises transmission unit 16, transmits unit 16 and itself comprises initial again or inlet conveyor 17, intermediate transport machine 18 and last or output conveyer 19.
Conveyer 17 comprises the belt 20 that forms ring around two belt pulleys 21 and 22, belt pulley 21 is installed on two fixed positions of coiling between 15 of wheel 5, belt pulley 22 is around the axle 23 parallel with axle 7 driving pulley of (Fig. 1) rotation in a clockwise direction, with the transmission of belt 20 prop up 24 with basically with dish 15 for relation radially and with wheel 5 be that the direction 25 of outward direction is passed station 14.Conveyer 17 also comprises a plate 26 that props up 24 parts of determining outside extending in wheel 5, plate 26 defines with 24 and highly is approximately equal to but is not less than the passage 27 of group 11 thickness, passage is defined by known fixing spiral folding device 28 on side direction, when group 11 along passage 27 by the time device 28 two opposite ends that are used for tubular packaging element 10 fold into each end of each parcel 2, and form closed packaging element 29 thus.
Conveyer 19 comprises the drum barrel 30 that is installed on the imput shaft 31 so that it can be around the axle 32 in a clockwise direction (see figure 1) rotation parallel with axle 23, drum barrel 30 presents a central annular groove 33, along groove 33 is all apart from the many known bearing 34 that separates, along the circular path P rotation coaxial with axle 32, each bearing is used for accepting and keeps each group 11 to bearing 34 with drum barrel 30.Groove 33 presents and is approximately equal to but is not less than the width of the length of packing 29, and defines two side direction dishes 35 on drum barrel 30, and each dish is installed in each bearing 34 place with heat sealing element 36.Therefore each bearing 34 provides two heat sealing elements 36 that face with each other, and each heat sealing component side is to each vertical end of each package 29 in use.
In the use of reality, when drum barrel 30 rotations, group 11 (being maintained at usually owing to suction in each bearing 34) is fed to unloading station 37, is transported to output wheel 38 in each group 11 of unloading station.
At it along in the moving process of drum barrel 30 circumference, each group 11 keeps contact with separately double-type heat sealing element 36, double-type heat sealing element usually by separately known drive means (not shown) court each other direction push and with the end heat sealing of each packing.
Usually 18 group 11 in intermediate transport machine is transported to conveyer 19 from conveyer 17, that intermediate transport machine 18 comprises is 25 parallel with direction, with belt 20 24 coplanar and with the extending-board 39 of the path tangentially of bearing 34; With parallel around belt 40, two belt pulleys 41 of two belt pulleys 41 and axle 23 and one of them be driving wheel.Belt 40 has and transmits 42, transmits 42 parallelly with plate 39 and towards plate 39, transmits 42 and defines passage 43 with plate 39, and passage 43 and passage 27 are coaxial; Many protrusions 44, they along belt 40 homogeneous phases every, its spacing width greater than group 11.
As shown in Figure 2, the relative side of passage 43 is by two belt 45 closures, every strap lug around two belt pulleys 46-one of them belt pulley is that the axle of driving wheel-belt pulley 46 is perpendicular with axle 23, and comprise 47,47 with parallel with direction 25 and plate 39 and belt 40 42 between extension.The surface of propping up relative each 47 with the opposite of another belt 45 is connected to separately heating plate 48 with sliding type, and heating plate 48 becomes integral body with the end that is used for plate 48 is shifted to the linear pattern actuator 49 of another plate 48 and control channel 43 width (it is as the function of speed of machinery 1).
With each actuator 49 and each belt 45, plate 48 has defined adjustable preheating device 50, and device 50 is used for the temperature that end is heated to the material softening point that is lower than sheet material 3 that is folded with package 29.
According to a kind of change machinery that is not illustrated, conveyer 17,18 and 19 is equipped with around a belt of belt pulley 21 and drum barrel 30 and is equipped with one to be extended and partly replaces around the single conveyer that the transmission of drum barrel 30 is propped up along path P along passage 27 and 43.
The operation of machinery 1 deferent segment 4 can clearly know from accompanying drawing and above explanation, and do not need further explanation.
Yet what should emphasize is, in addition when machinery 1 be when under maximum speed, operating, preheating device 50 also can make heat sealing element 36 keep in the short period of time exactly to be higher than sinter point to carry out the end that is folded of heat sealing and setting packing 10.Therefore this possibility of not only having eliminated sheet material 3 fusions basically and/or having been burnt, but also shortened length by the product 2 path parts of heat sealing element 36 influences, and reduced the overall dimensions of machinery 1 thus.In this connection, should be noted that, operate that it is 100 ℃ that sheet material 3 is preheating to temperature if heat sealing element 36 is set under 150 ℃, can with common heat sealing time decreased under the without preheating required time roughly 1/5th.In addition, be preheating to that part material that the material softening temperature that is lower than sheet material 3 can prevent sheet material 3 is adhered to belt 45 and with its contamination.
Claims (11)
1. method with thermoplastic material (3) external packing product (2), this method may further comprise the steps: along prescribed path product (2) is sent into continuously with corresponding housing material sheet (3); Give the shape that be folded of sheet material (3) along the initial segment (17) in said path around product (2); The shape that by the heat sealing device sheet material (3) setting is being folded along the back segment (19) in said path; It is characterized in that also comprising other step: be preheating to temperature near the softening point of said material along the sheet material (3) of the near small part of interlude (18) in said path, said preheating step comprises the additional step that is adjusted in the heat that is transferred to said sheet material (3) between warming up period as sheet material (3) and each product (2) along the function of the delivery speed of the interlude in said path.
2. the method described in claim 1, it is characterized in that by sheet material (3) is folded into the tubular packaging element (10) of two opposite end openings and gives each sheet material (3) said folding shape by further pleated sheet (3) to seal said two ends around each product (2); Sheet material (3) is preheated, and carries out heat sealing at said two ends then.
3. as the desired method of claim 1, it is characterized in that the said initial segment (17) in said path has at least one section straight line portion; Every sheet material (3) is infeeded along said straight line portion (17) continuously with each product (2).
4. as the desired method of claim 3, the said interlude (18) that it is characterized in that said path is a straight line portion that aligns with said straight line portion (17); Each sheet material (3) is sent into each product (2) continuously along the said interlude (18) in said path.
5. as the desired method of each aforementioned claim, the said back segment (19) that it is characterized in that said path extends around the arc (P) with said interlude (18) tangent circles in said path; Each sheet material (3) is sent into each product (2) continuously along the said back segment (19) in said path.
6. machinery with thermoplastic material (3) external packing product, this machinery comprises the conveyer (17 of sending into product (2) and corresponding housing material sheet (3) usefulness along the path of regulation continuously, 18,19), said conveyer (17,18,19) comprise initial segment (17) and back segment (19); Give sheet material (3) with the folding device that is folded shape (9a, 9b, 28) around product (2); Be positioned at said back segment (19) and sheet material (3) setting be folded the heat sealing device (36) of shape; It is characterized in that said conveyer (17,18,19) also comprises interlude (18); Be provided with along said interlude (18) reach the heating arrangement (50) of temperature to be preheated to small part sheet material (3) near the softening point of said material, said heating arrangement (50) also comprise the actuating device (49) that links to each other with said heating plate (48) in case adjustment as the distance between two heating plates (48) of the function of the delivery speed of said interlude (18).
7. as the desired machinery of claim 6, it is characterized in that said heating arrangement (50) also comprises two belts (45) that are placed at the continuous movement between the said heating plate (48) and define the passage (43) that is used for sending into product from side direction along said interlude (18).
8. the desired machinery of claim 7 as the aforementioned is characterized in that said initial segment is by linear pattern at least in part, and first conveyer (17) that moves defines continuously; Said second folding device is positioned at along said first conveyer (17) that moves continuously to be located.
9. as the desired machinery of claim 8, it is characterized in that said interlude (18) is by linear, second conveyer that moves defines continuously.
10. the desired machinery of claim 9 as the aforementioned is characterized in that said back segment (19) is by defining around the transmission machinery drum barrels (30) that its axle (32) moves continuously; Said conveyer drum barrel (30) is tangent with said interlude (18).
11. as the desired machinery of claim 10, it is characterized in that said drum barrel (30) comprises many bearings (34), each bearing is used for accepting each product (2); Said heat sealing device (36) comprises that two heat sealing elements (36) are used for said bearing (34) and can move with each said bearing (34).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000090A/96 | 1996-02-28 | ||
| IT96BO000090A IT1285569B1 (en) | 1996-02-28 | 1996-02-28 | METHOD AND MACHINE FOR OVERWRAPPING PRODUCTS WITH SHEETS OF THERMOPLASTIC MATERIAL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1168849A CN1168849A (en) | 1997-12-31 |
| CN1083376C true CN1083376C (en) | 2002-04-24 |
Family
ID=11341148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97109966A Expired - Lifetime CN1083376C (en) | 1996-02-28 | 1997-02-28 | Method and machine for overwrapping products in sheets of thermoplastic material |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0792803B1 (en) |
| JP (1) | JP3739514B2 (en) |
| CN (1) | CN1083376C (en) |
| DE (1) | DE69722056T2 (en) |
| IT (1) | IT1285569B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1310493B1 (en) | 1999-09-27 | 2002-02-18 | Gd Spa | AUTOMATIC MACHINE PROVIDED WITH AN OPERATING WHEEL WITH WIRELESS CONTROL. |
| US20060130433A1 (en) * | 2004-12-22 | 2006-06-22 | Philip Morris Usa Inc. | Multi-stage heater plates for sealing and shrinking overwrap |
| ITBO20080076A1 (en) * | 2008-02-06 | 2009-08-07 | Gd Spa | MACHINE FOR CONDITIONING PRODUCTS IN ENCLOSED MATERIALS. |
| DE102022105780A1 (en) | 2022-03-11 | 2023-09-14 | Focke & Co. (Gmbh & Co. Kg) | Device for sealing and/or shrinking outer wrappings of packages |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB901139A (en) * | 1959-12-16 | 1962-07-18 | Hesser Ag Maschf | Apparatus for heat sealing package closures of thermoplastic material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1134500A (en) * | 1965-05-20 | 1968-11-27 | Heinz Hermann Focke | Improvements in or relating to packaging machines |
| US4362593A (en) * | 1980-11-17 | 1982-12-07 | Nordson Corporation | Walking-beam band sealer |
-
1996
- 1996-02-28 IT IT96BO000090A patent/IT1285569B1/en active IP Right Grant
-
1997
- 1997-02-26 EP EP97103135A patent/EP0792803B1/en not_active Expired - Lifetime
- 1997-02-26 DE DE69722056T patent/DE69722056T2/en not_active Expired - Fee Related
- 1997-02-26 JP JP04264797A patent/JP3739514B2/en not_active Expired - Fee Related
- 1997-02-28 CN CN97109966A patent/CN1083376C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB901139A (en) * | 1959-12-16 | 1962-07-18 | Hesser Ag Maschf | Apparatus for heat sealing package closures of thermoplastic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09323709A (en) | 1997-12-16 |
| IT1285569B1 (en) | 1998-06-18 |
| ITBO960090A1 (en) | 1997-08-28 |
| EP0792803A1 (en) | 1997-09-03 |
| JP3739514B2 (en) | 2006-01-25 |
| CN1168849A (en) | 1997-12-31 |
| DE69722056D1 (en) | 2003-06-26 |
| ITBO960090A0 (en) | 1996-02-28 |
| DE69722056T2 (en) | 2004-01-29 |
| EP0792803B1 (en) | 2003-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |