DE202007001348U1 - Device for applying material to a substrate in the assembly line method and window sealing system - Google Patents

Abstract

contraption (1) for mounting material (2) on a substrate (3) in the assembly line method, at a fastening head (5) for establishing a connection between Material (2) and substrate (3) during a fixing phase in synchronism with the substrate (3) and the material (2) entrained is, characterized in that the fastening head (5) for circulating is guided along a closed path (6), from the a section (7) follows the substrate flow.

Description

Field of the invention

The The invention relates to a device for applying material on a substrate in the assembly line process as well as a window sealing system according to the preamble of claim 1 or 13.

Background of the invention

The Task, a material in particular as a blank on an endless or to produce a cut substrate in mass production with high throughput, arises, among other things, when sealing windows during manufacture of window envelopes, in the manufacture of beverage packaging with viewing windows and closing cups.

For example, it is for producing window envelopes US 3,887,414 known, tailored envelopes with a recess for the window and a recess surrounding the recess of a heat-activated adhesive on a roll on which they are held by vacuum, with window blanks of foil, which are also supplied via vacuum on another role, each other overlap. A third roll, which is heatable and rolls on the first roll, then activates the adhesive. To avoid overheating of the first roll water cooling is provided therein.

That from the US 3,887,414 However, known system of three successive rolling roles that must be heated, water-cooled and / or supplied with vacuum, however, is complex and expensive and also has a low maximum throughput.

To seal a container by means of a foil is off DE 197 33 304 A1 a device is known in which cup-shaped containers are fed to a cyclically driven carrier of a back and forth adjustable welding device. In this case, the welding device is lowered onto a container covered with a film during the break between two cycles. During the subsequent advancement of the carrier, the welding device moves under the effect of the film in synchronism with the carrier, until the next break, in which the welding device detaches from the container and returns against the advancing direction of the carrier to its original position.

However, such devices are severely limited in terms of achievable throughput. Although the use of several adjacently arranged in the conveying direction welding devices can lead to an increase in throughput. However, this increases the mass to be accelerated and decelerated at each cycle, so that the limit of the throughput achievable with economically justifiable outlay is also quickly reached here. Furthermore, the space requirement increases significantly. In addition, the heat acts on returning the welders on the underlying films, which can lead to a curling of the surface. This affects the quality. Finally, before each mounting phase, the speed and position of the welding devices must be synchronized again and again with the containers. This requires the in the DE 197 33 304 A1 described pauses that reduce throughput, or a complex control technique, however, which is complex, prone to errors and costly.

Summary of the invention

Of the Invention is therefore based on the object, a device for Application of material to a substrate in the assembly line process and a window sealing system according to the preamble of the claim 1 or 13 to create, with a simple and space-saving design and cost manufacturability high throughput and allow a high quality.

These Task becomes according to the features of claim 1 or 13th solved.

hereby An apparatus for attaching material to a substrate is disclosed in the assembly line method, in which a mounting head for Establishing a connection between material and substrate during a fixing phase in synchronism with the substrate and the material is feasible, created at the attachment head runs along a closed path, of which a section of the Substrate flow follows. The attachment of the material to the substrate takes place in a known manner within the substrate following the flow Section of the circulating track.

To However, the fastening head no longer has to be braked and against the substrate feeding direction to a starting point be traced back where he braked again and again opposite to the substrate feed rate has to be accelerated and synchronized with the substrates. Rather, the attachment head runs along the closed Continue on the train until it arrives at the starting point again.

Compared to a device in which attachment heads are moved back and forth and thus always accelerated and decelerated, it results According to the invention a simpler, cheaper. and especially space-saving construction. In addition, there is a high throughput, since with a revolution for lack of braking and acceleration of masses significantly higher speeds can be achieved. Finally, no hot sealing heads move across the substrates, as is the case with the backward movement of a device reciprocating the sealing heads. This is a heat on the substrate, the z. B. can lead to the curling of films, effectively avoided. The attachment of the material on the substrate is thus possible with high quality.

Of the Fastening head is expediently on an endless circumferential Band attached. Such a band is for example as a timing belt along with Drive roller cheaper and easier to implement as a reciprocating carriage.

Become several attachment heads provided increases the achievable throughput. This increases the space required only insignificant compared to a reciprocating slide.

Especially It is advantageous if the attachment heads individually are controllable and z. B. in each case a wireless Have a receiver or a connection to a bus, which can be integrated in the circulating band. Thereby can lowering, lifting and / or location, duration and / or type Exposure to material and / or substrate extremely be controlled flexibly. This will z. Possible, with several mounting heads different parts of a Substrate to edit, such as different sized windows to close with different materials. The Mounting heads can also be autonomous, z. B. on the duration and nature of the action on the substrate depending on sensor data decide yourself or join Shut off defects.

To Beginning of the mounting phase are the mounting heads preferably lowered in the direction of the substrate and at the end of Fixing phase in the direction of the substrate liftable. Through the targeted Lowering and raising is a high positioning precision reachable.

The Duration of the attachment phase is expediently controllable depending on the conveyor belt speed, either via a central control in particular for each mounting head individually or autonomously by each Fastening head. As a result, even with fluctuations in the assembly line speed and in particular when starting up and braking the conveyor belt ensures a consistent quality of attachment.

The Path is expediently perpendicular to the substrate plane arranged so that the mounting head on a section, the opposite to the section following the substrate flow, transported upside down. This results in a low space requirement in the area. However it can be provided to arrange the web parallel to the substrate plane, around both sections, each with counter-rotating conveyor belts to align and thus increase the utilization of the device.

The Material can be between the substrate and the mounting head be fed, so that the mounting head directly on the Material act, it z. B. can melt to it with the substrate connect to.

The Substrate and / or the material are expediently supplied in the form of successive blanks, wherein the substrate may have a window, which z. B. by a film is sealed, in particular, close to the substrate is welded on. As a result, with the invention Device typical tasks in the production of beverage packaging with viewing windows or window envelopes easy and without waste, thus saving material, feasible.

The Invention is applicable wherever a material in particular as a blank on an endless or cut substrate in Mass production with high throughput should be applied. The The invention is therefore not limited to the main application described here. the closing of recesses by means of film, limited.

Further Embodiments and advantages of the invention will become apparent from the following description, the figures and the claims.

figure description

1 schematically shows a window sealing system according to the invention with a device according to the invention and an assembly line.

2 illustrates a substrate cut and material blanks.

3 shows a further embodiment of a device according to the invention.

4 illustrates a further embodiment of a window sealing system according to the invention in plan view.

Detailed description individual embodiments

In the 1 illustrated device 1 for attaching material 2 on a substrate 3 that's about a production line 4 supplied, includes a plurality of attachment heads 5 moving along a closed pathway 6 circulate, of which a section 7 the substrate flow on the assembly line 4 follows.

That on the assembly line 4 to the device 1 guided substrate 3 is here exemplified by particularly evenly spaced beverage carton blanks, which in 2 with already laid cut material 2 illustrated in more detail. The cut material 2 , z. B. foil expediently covers one or more recesses 8th in the substrate 3 that z. B. are provided as a viewing window of the beverage cartons. The material 2 Also on a non-recessed section 9 For example, be applied as an ornament and liable z. B. by electrostatic charge sufficiently firmly on the substrate 3 but can also be temporarily prevented from slipping on the substrate by a glue dot or by clamps or the like 3 be secured.

The material 2 is through the mounting heads 5 on the substrate 3 permanently, in particular sealing, attached. For this purpose, the attachment heads 5 each fastener on the substrate 3 and / or the material 2 can act to make any connection between them. For example, is the material 2 a film, the attachment means may be used to melt the film onto the substrate 3 be designed. Furthermore, the fastening means may optionally activate previously applied hot melt adhesive and / or a mechanical connection, for. B. by cutting, folding, punching or the like, between material 2 and substrate 3 produce. Non-contact fastening means which act, for example, on induction-activatable adhesive can also be provided.

The fastening heads 5 are along the closed track 6 expediently arranged equally spaced. For this purpose, the attachment heads 5 be mounted on a continuous endless belt, in particular a toothed belt. Such a timing belt is inexpensive to produce and between two pulleys, of which at least one can be driven and provided with an external toothing driven.

The power supply of the mounting heads 5 can be done via integrated in the band electrical lines, which are supplied via sliding contacts with a voltage. In addition, via such electrical lines control signals to the mounting heads 5 be transmitted, for. B. for lowering and lifting at the beginning or at the end of the mounting phase or for heating a heating element for welding foil on the material, etc. Here, it is expedient, each mounting head 5 to control individually. For this purpose, each mounting head 5 an address can be assigned and the communication can be made via a common protocol for a two-wire bus or, for example, wirelessly via a radio network or the like.

The attachment of the material 2 on the substrate 3 will now be based on a mounting head 5 described.

To connect, the attachment head acts 5 on the material 2 and expediently also the substrate 3 during a fixing phase.

If the action requires physical contact, the attachment head becomes 5 or at least its fastener at the beginning 10 the fastening phase in the direction of the assembly line 4 lowered until he got the material 2 contacted. He moves at the same speed with which the assembly line moves 4 moved, in synchronism with the assembly line 4 and while maintaining contact with the material 2 and the substrate 3 With. For example, when sealing foil to a carton blank, the attachment phase may take about one second, with the line moving at about 1.5 m / s. At the end 11 the fastening phase, the fastening head dissolves 5 from then on the substrate 3 fastened material 2 , Then follows the mounting head 5 the course of the endless train 6 , ie it is deflected at a deflection roller and upside down and opposite to the conveyor belt conveying direction to the other pulley and to the beginning 10 transported back where the cycle closes.

On the other hand, if the exposure does not require physical contact, the reduction may be smaller or eliminated altogether. The attachment phase begins in this case at the earliest when the mounting head 5 after passing the pulley the material 2 opposite, and ends at the latest when the mounting head 5 through the other pulley from the material 2 is moved away. The beginning and the end of the action can be precisely controlled within these limits, z. B. in the aforementioned induction activatable adhesive by switching on and off of the induction causing current in the mounting head 5 , Is a control not provided, for. B. in the case of a permanently heated mounting head 5 and a heat-activatable adhesive, the action is over the entire area between the two Pulleys.

Regardless of whether the action occurs with or without physical contact between the mounting head and the material / substrate, the mounting heads become 5 preferably controlled independently of each other, for. B. with respect to the respective lowering or activation of the fastener of the respective mounting head. To enable this flexibility, the mounting heads 5 individually from a controller 12 be controlled. For this purpose, the attachment heads 5 each with a unique address to be connected to a network, for example via a two-wire bus or via a wireless network, eg. B. on WLAN basis.

The control 12 can also be configured to the rotational speed of the mounting heads 5 and / or to adjust the duration of the attachment phase according to the line speed. Thus, for example, when starting up the assembly line, ie before reaching the maximum assembly line speed, a longer time fixing phase can be used than after reaching the target speed.

3 illustrates two conveyor belts 6 with substrates 5 , Every conveyor belt 6 Here, for example, a parallel concurrently narrow auxiliary band is assigned, on which larger substrates 5 or that can be used to support the substrates 5 align by moving it relative to the conveyor belt 6 is moved faster or slower. This can also be done next to the substrates 5 illustrated bright alignment finger can be used.

4 illustrates an arrangement of the web 6 parallel to the substrate plane while the web 6 in 1 is arranged transversely to the substrate plane. In this arrangement, multiple conveyor belts 4 with a device according to the invention 1 to be served.

In a further embodiment, the material 2 on the mounting heads 5 opposite side of the substrate 3 be provided. In addition, instead of the illustrated blanks an endless substrate 3 and / or an endless material 2 be used. In this case, separation by cutting or the like takes place either after passing through the device 1 or optionally by means of the attachment heads 5 or unillustrated separating means of the device 1 even while passing through the device 1 instead of. Furthermore, the track 6 be a stationary guide, at which the attachment heads 5 Move autonomously through built-in motors. In this case, the speed of the attachment heads 5 outside the attachment area 7 from the speed of the assembly line 4 differ.

1

contraption

2

material

3

substratum

4

assembly line

5

fastening head

6

train

7

section

8th

recess

9

section

10

Beginning

11

The End

12

control

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - US 3887414 [0003, 0004]
• DE 19733304 A1 [0005, 0006]

Claims (15)

Contraption ( 1 ) for attaching material ( 2 ) on a substrate ( 3 ) in the assembly line process, in which a fastening head ( 5 ) for establishing a connection between material ( 2 ) and substrate ( 3 ) during a mounting phase in synchronism with the substrate ( 3 ) and the material ( 2 ) is carried, characterized in that the fastening head ( 5 ) to circulate along a closed path ( 6 ), of which a section ( 7 ) follows the substrate flow. Device according to claim 1, characterized in that the fastening head ( 5 ) is mounted on an endless circulating belt, in particular a toothed belt. Apparatus according to claim 1 or 2, characterized in that along the closed path ( 6 ) several circumferential attachment heads ( 5 ) are provided. Device according to claim 3, characterized in that the fastening heads ( 5 ) are each individually controllable and in particular autonomous. Device according to one of claims 1 to 4, characterized in that the fastening head ( 5 ) at the beginning ( 10 ) of the fastening phase in the direction of the substrate ( 3 ) lower and at the end ( 11 ) of the fastening phase in the direction from the substrate ( 3 ) can be lifted. Device according to claim 5, characterized in that that the duration of the fixing phase depends on the material speed is controllable. Device according to one of claims 1 to 6, characterized in that the web is arranged perpendicular to the substrate plane and the mounting head on a the section ( 7 ) opposite section is transported upside down. Device according to one of claims 1 to 7, characterized in that the material ( 2 ) between the substrate ( 3 ) and the fastening head ( 5 ) can be fed. Device according to one of claims 1 to 8, characterized in that the substrate ( 3 ) and / or the material ( 2 ) can be supplied in the form of successive blanks. Device according to one of claims 1 to 9, characterized in that the substrate ( 3 ) a recess forming a window ( 8th ) having. Device according to one of claims 1 to 10, characterized in that the material ( 2 ) is a foil. Apparatus according to claim 11, characterized in that the fastening head ( 5 ) for sealing the film to the substrate ( 3 ) is trained. Window-sealing installation for closing windows in substrate sections with film, comprising a device ( 1 ) according to one of claims 1 to 12 and an assembly line ( 4 ) over which substrate blanks each having at least one window of the device ( 1 ), as well as a feeding device for foil blanks. Window sealing system according to claim 13, characterized in that a parallel to the assembly line ( 4 ) running auxiliary belt for supporting and / or aligning the substrate blanks is provided. Window sealing system according to claim 13 or 14, characterized characterized in that the auxiliary band has alignment fingers.