DE1454964B1 - Device for friction welding two container parts made of thermoplastic material - Google Patents

Description

3 4

Speed is a decoupling from the rotary drive, the socket and the holder by a driven one

whereupon the upper container part can be moved from the holder on the shaft on a circular path and the

lower part of the container is pressed. The weldable rotatable holder on part of the circular path with

ßung then goes under the action of the stored the rotary drive is in engagement, the Ab-

Rotational energy in front of you. This has the advantage of having 5 positions of the holder from the socket through

that the extent of the stored rotational grooves engaging cams are controlled,

energy very precisely to the present and The invention is in the following with reference to

for a correct welding required delayed embodiments in connection with

can adapt conditions. Explained in the final stages of the drawing. The drawing shows

The welding process takes the stored energy xo in

Due to the reduced speed and increased friction, Fig. 1 shows a vertical partial section through an exercise resistance very quickly. So there is a brief automatic adjustment in one position according to the invention, which allows the prior to the start of the welding process,
Tolerance range of the already very precisely adjustable Fig.2 to select a view corresponding to FIG. 1 in ren starting speed relatively wide. After 15 a position, which corresponds to a further phase of the end of the welding process, the holder ganges,

removed again from the socket, and one can, according to FIG. 3 one also of FIG. 1 similar view,

Switching off the suction device for the finished container - the one position shortly before the end of the welding

lose weight. Process corresponds to

The very precise function of the device is shown in FIG. 4 a broken plan of the front

the possibility of precisely directing the generated temperature,

set so that weld seams occur without Fig. 5 showing a broken, schematic side view

it leads to a complete liquefaction of the suction device including the control

the lying surfaces comes. This reduces that according to the invention.

time required for each weld, so FIG. 6 shows an enlarged sectional view of a

that the device can work very quickly. air operated valve in its rest position,

The device is also independent in its function. 7 the valve according to FIG. 6 in his working

depending on the attentiveness of the operator,

sonals. It works automatically, with only the FIG. 8 a broken, enlarged, vertical Period of time during which the holder with the rotary connection 30 Sectional view of a modified part of the device drive is coupled, must be selected. tion.

The device according to the invention is also shown in FIG. 4, the device 1 has a characterized in that the socket on a main frame 2, in which a vertical, attached-sleeve sits, which is movably mounted on a shaft driven shaft 3 is mounted. On the shaft 3 sits a and through notches a rotation of the part 35 of the chain wheel 4 around which a drive chain 5 is guided prevented when the socket and the holder is with the, in turn, by a non-illustrated Mo parts are merged. The non-rotatable locking gate, for example an electric motor, is driven tion of one part in the version is carried out. The shaft 3 rotates, seen in especially easy. Fig. 4, clockwise. She wears an upper carrying

According to a preferred feature, the suction plate 40 has 6 and a corresponding lower support plate 7 device a channel that normally goes through (Fig.2). On the upper support plate 6 is a multi-line Part of an element is closed, on which number of radially protruding support arms 8 are attached, ches the device for detecting a container part, for example welded on. Corresponding tragles forms, with a spring device provided arms 9 also sit on the lower support plate 7, and is, which is normally the element in channel closure 45 directly below the support arms 8. Furthermore position presses. The suction device is thus provided directly an upper stationary ring 10, which radially actuated by the associated container part. Should this be outside the support arms 8 and a guide container part are not correctly arranged, then track 11 remains in place. Below the ring 10 has the the suction device is inactive, and there is no corresponding, stationary device 1 a welding process. The latter is also true if 50 ring 12 (Figs. 1 to 3), which is located radially outside the support thereof Part of the container is completely missing. One avoids on poor 9 in the vicinity of which is arranged and this way incorrect welding processes and a guide track 13 carries.

Sucking out the inside of the other container part on the radially outer end of each support arm 8

les located material. sits a first or upper carrier 14 with a cy-

The same advantages are in an applied 55 cylinder 15, which is on the underside of the support arm 8

Embodiment according to the invention given, strengthened, for example welded on. The cylinder

which is characterized in that the suction force 15 takes a sliding fit in a vertical direction

Applicable devices on a normally displaceable shaft 16, which with its upper

channel closed by a ball seal at the end of a channel above the support arm 8

point through which a rod that is connected to the 60 block 17 leads. The block 17 carries one

move onto the container part, the ball seal opens. Stub shaft 18 with a roller conveyor, for example

It is particularly advantageous that the suction-shaped cams 19, which are inserted into the guide track 11

Direction has a compressed air operated valve, wel- cut guide groove 20 runs. To this

ches is actuated when the ball seal can be out of the way the block 17 and the shaft 16 in

Channel is moved out. 65 vertical movements are offset when the

To the distances between the holder and the carrier 14 with the support plate 6 rotates. The wave 16

Version in a structurally particularly simple manner is guided in ball bearings 21 between her and

To be able to control, the invention proposes that the inner surface of the cylinder 15 lie.

5 6

A rotatable head 22 is on the lower end holder 24 and the disc 38 is larger than the gear

of the shaft 16 with the help of bearings 23 and the entire height of the container, so that it is in between

carries at its lower end a ring-shaped poses. A rod 52 then protrudes, Holder 24 for receiving a container part. For this purpose, the slide formed in a shaft 16 the holder 24 has a plate-shaped recess 5 bore 53 is guided downwards over the recess

25. In this a central opening 26 is provided, 25 in the underside of the holder 24 addition,

the purpose of which will be explained in more detail. The upper end of the rod 52 extends through

The head 22 carries a disk 27, which has a bore 54 in the block 17 and a channel

Rotary drive 28, for example from a belt nal 55 between the bore 54 and a

(see. Fig.4) can be detected. The latter is located around 10 second bore 56. The rod 52 ends in

Washers 29, 30 and 31 placed, in turn, on a ball seal 57, the diameter of which is larger

Main frame 2 are stored. The rotary drive 28 as that of the channel 55 is. So if the ball seal

can be driven by means of an electric motor 32 device is seated on the upper end of the channel 55 is

which is closed on the main frame 2 from this. The bore 54 is with a

and connected via a drive belt 33 to the 15 ventilation duct 58, and the rod

Disk 31 is coupled. As can be seen from FIG. 4 he 52 is within the bore 54 of a ring seal

there, the rotary drive 28 is arranged such that it surrounds device 59.

with each disk 27 only during part of the diameter of the bore 53 is considerable

the movement of the associated carrier 14 to the greater than the diameter of the rod 52, so that a

Shaft 3 engages. 20 annular space 60 is created. This extends over the

On each lower support arm 9 sits a full length version of the shaft 16 and is at the upper end

34 on a shaft 35, which is connected to a threaded extension with a channel 61 which is guided via an opening 36 in the support arm 9 and an annular groove 62 a to a lock nut 37 formed in the block 17. At her top channel 62 leads. At the channel 62 is one with the Ren end, the shaft 35 carries a disk 38, the 25 block 17 connected end of a flexible line forms a seat for a container part C. The one to be connected 63, the other end of which is connected to a working container, in which valve 64 (Fig. 5) is connected,
fusible plastic such as polystyrene, linea- The valve 64 forms part of a suction device made of polyethylene or the like. A sleeve 39 device 65, which surrounds the container part 51 via the carrier 14, the shaft 35 and can be detected on this in the longitudinal 30 and releases. The suction device has a slide direction. During its sliding movements, it becomes the compressor 66, the high pressure side of which is guided to one of balls 40 which is connected to the T-piece 67 between the shaft. From this go

35 and the sleeve 39 are arranged. On the sleeve lines 68 and 69 from. The line 68 leads to a 39 seated a gripper 41 of such a design that the low-pressure high-volume regulator 70, known per se, grips the lower section 42 of the container part C , and the line 69 supplies one. The lower portion of the container part C is provided with high pressure low volume regulator 71 of similar design longitudinal notches 44, and the manure. The regulator 70 is with the help of a tube 72 inner surface of the gripper 41 carries ribs 45 which are connected directly to one side of the valve 64 and engage in the notches 44 and a non-rotatable sen. The regulator 71 is connected to a pipe 73. 40 side of a T-piece 74 in connection, the opposite of which

The lifting and lowering movements of the socket overlying the side via a pipe 75 to the valve 34 are controlled via a stub shaft 46 that is connected to 74. One goes from the T-piece 74 from which a cam 47, for example a roll of gela-flexible line 76, which via a connection 77 device is. This cam rotates in a guide groove 48 leading to the bore 56. Furthermore is a Unterder Guide track 13 a. As is also provided in the pressure generator 78, the vacuum of which will become apparent in the following description, the vertical side are connected to the valve 64 via a pipe 79 Movements of the frame 34 through the trains.

The valve 64 consists, for example, of a

cam-controlled vertical movements of the Trä- housing 80 with an inner chamber 81 in which a

gers 14 matched, however, the movements 50 sliding valve element 82 with a number of

of the carrier 14 and the socket 34 is arranged independently of flanges 83, 84 and 85. In the

happen to each other. In the rest position, the valve 64 takes the position shown in FIG.

The container part C has an upper portion showing a position with the valve element 82 entirely

49, which is welded to a container part 51 and shifted to the left. It will be in this location

shall be. This container part 51 closes a 55 generated by the controllers 70 and 71

upper opening 50 of the container part C. Both containers- its opposite ends applied

parts can be kept from the above-described materia pressure difference. The supplied by controller 71

lien made of the same materials. the air pressure is greater than that of the

The container part 51 can in the area of its circumference 70, namely as static pressure, since the spherical

have dispensing openings, namely in seal 57 the channel 55 in the upper part of the block

dependence on the goods contained in the container. It kes 17 keeps closed when the carrier 14 his

however, it is necessary in any case that at least assume a raised position. With this location of the

a portion of the container part 51 imperforate valve element 82, the flange 84 closes the tube

is. 79 against the flexible line 63.

According to FIG. 1, the carrier 14 and the fiber 65 When the device is in operation, a filled

Solution 34 of their associated cam controls, container part with the container part 51 loosely exposed

held at a distance from one another and take their placed between the carrier 14 and the socket 38.

Starting position. The distance between the he is supported with his floor on the

Washer 38. In the event of a subsequent rotation, while the head 22 continues its free rotation around the hung of the shaft 3, which does not yet continue to engage the shaft 16 and the container part 21 continues to guide the rotary drive 28, a change remains sucked onto the holder 24 . As soon as the container part of the guide track 11 engages a downward movement part 51 by lowering the carrier of the block 17 and the shaft 16 from the position shown in FIG. 1 5 14 with the container part C , the position shown in FIG. 2 is generated. the relative rotation between the container parts which, when the shaft 16 moves downward, encounters the required frictional heat. The lower end of the rod 52 is on a non-perforating opposite surface of the container parts th section of the container part 51 and ends sticky, while the speed continues to decrease, there its movement, so that the ball seal 57 melt in the following phase or the channel 55 opens. In the process, air from the regweld welds the container parts to one another, and the ler 71 in front of the valve 64 through the flexible line rotation of the head 22 comes to a standstill. Branched off at 76, behind the ball seal 57 in this way, the relative rotation between the bore 54 is introduced, and from there terminated by the container parts, and it cannot be released to a ventilation duct 58 to the atmosphere. In doing so, the already created tearing open again leads to a reduction in pressure on the right weld.

Side of the valve element 82, whereupon the Reg- When the shaft 3 rotates again

Via the air pressure supplied to the valve 64, the valves guide tracks 11 and 13 again to act tilelement 82 to the right from the position shown in FIG. 6 and allow the gripper 41 to move downwards and the shaft in the position shown in FIG. 7 to move upwards. Is the container part 51 can slide on. This movement of the valve element welded onto the filled container part C , a connection between the flexible cable, the weight of the container, the device 63 and the tube 79 from the holder 24 is sufficient. This will overcome a vacuum applied by suction. The holder kuum applied to the annular space 60, which accordingly separates itself from the container and is large enough to secure the container part 51 to the holder 24 and moves upwards, whereupon the rod 52 sucks. falls down. The ball seal 57 opens

In the event that a container inadvertently does not carry the upper end of the channel 55 and closes this NEN container part 51, the rod 52 does not hit anything, so that the valve 64 again full of the controller 71 obstacle. The suction device remains accordingly acted upon. The valve element 82 wanders datung 65 unactuated, and there is no negative pressure on the 30 at the in FIG. 7 into the position shown in holder 24. Consequently, the figure does not exist either. 6 and closes the shaft 16 possibility that part of the container contents from against the vacuum generator 78 from.
is sucked out of the container. When the carrier 14 and the socket 34 have their

During the time in which the holder 24 has reached positions that are distant from one another, the guide track 13 acts on the mount 34, 35 the shaft 3 rotates into such a position that a and lifts the sleeve 39 and the gripper 41 can be removed from the welded container from the device herder the position shown in Fig. 1 in the position according to. Successive Fig. 2. The gripper 41 can therefore pass through the lower carrier 14 and sockets 34 partially encompass the same section 42 of the container part C and an operation to weld further containers,
seize. 40 The embodiment shown in FIG. 8 according to

If a container part 51 firmly sucked on the holder 24 corresponds to the invention in its function Weitgeist, the guide track 11 acts on the block 17 a starting of the embodiment described above. It and brings the carrier 14 into its raised position has a rotatable head 86 which the head 22 ment back, the container part 51 corresponds to the container part and is separated with the help of bearings 87 on the shaft part C. The carrier 14 arrives at 45 16 is arranged.

a height at which the disk 27 with the rotary The head 86 contributes to common rotation

drive 28 can interact. a container portion engaging assembly 88, the

If the shaft 3 continues its rotation, it will consist of three ring parts 89, 90 and 91. The ring, the disc 27 of the raised support 14 from the parts are engaged with each other by means of screws 92-rotary drive 28, whereupon the head 22 is fixed by 50. The ring part 89 connects to the lower shaft 16 is set in rotation. The speed at the end of the shaft 16 and is provided with an annular groove 93 speed with which the head 22 is rotated, which with transverse slots 94 depends on numerous factors, for example the underside of the shaft 16 in connection . The type of material from which the container parts are made of slots 94 adjoin the bore 53 of the mass of the upper container part and of the shaft 16. The ring part 90 sits on the ring part force with which this then on the lower 89 and is shaped so that it is pressed between the two container parts. It has been found that ring parts form a chamber 95. Channels 96 that when friction welding parts from the axially extend through the annular part 89 and the above-mentioned materials using a len a connection between the annular groove 93 and a low pressure a rotation of the head with 60 of the chamber 95 her.

a speed of approximately 3000 revolutions per The ring part 91 sits on the ring part 90, wherein

Minute leads to satisfactory results. both ring parts are shaped so that they are between

When the shaft 3 continues to rotate, an annular chamber 97 will be formed. A recess carrier 14 over the rear end of the rotary drive 98 in the underside of the ring part 91 corresponds to ih-28 led out so that the disc 27 out of shape after the container part 51. Channels 99 is reached. The guideway then acts as a connection between the annular chamber 97 and 11 with the block 17 and lowers the wheel recess 98.
ger 14 in the direction of the lower container part C On the inner surface of the ring part 91 is a HaI-

ter 100 for receiving a ring seal 101 is arranged. The holder 100 surrounds an opening 102 in the wall of the ring part 91. Axially aligned with the opening 102 is an opening 103 in the Wall of the ring part 90 is provided. A channel 104 in the ring part 89 is in turn aligned with this. Seals 105 and 106 are seated in opening 103 and in channel 104, respectively.

A control valve 107 reciprocable in the arrangement 88 is provided, has an element 108 which through the opening 102 to the outside protrudes. The element 108 carries a flange 109 which is received in the ring seal 101 and on its upper end terminates in an enlarged part 110, the base of which is on one end of a spring device 112 is seated. The opposite end of the spring device is supported on the base of the Channel 104.

If the in F i g. 8 is used, a suction pump corresponding to the vacuum generator 78 can be connected to the shaft 16 in order to continuously apply a vacuum to the bore 53. The other parts of the suction device 65 described above can be omitted. As soon as the control valve 107 is in the position shown in FIG. 8, the application of negative pressure to the bore 53 does not lead to the generation of negative pressure in the recess 98 of the annular part 91, since the part 110 interrupts the connection between the channels 96 and the annular chamber 97. When lowering the shaft 16 in the

ίο the manner described above to achieve an intervention between the element 108 and a container part 51, the element 108 is up against the Effect of the spring device 112 shifted. The part 110 thereby passes completely into the channel 104 into it, whereby a connection between the chamber 95 and the annular chamber 97 is created, namely via the opening between the seal 105 and the element 108. The one supplied by the vacuum generator Vacuum can then be applied via channels 99

so the container part 51 can be applied to the latter sucking into the recess 98 and holding it during the welding process.

1 sheet of drawings

Claims (6)

1 2 D .. Receipt of container parts lying on top of one another Patent claims: and an axM f] uchtenden, in changeable distance 1. Device for friction welding two stand to the socket arranged rotatable holder.
Container parts made of thermoplastic material with In a known device of this type a non-rotatable mount for receiving up- 5 (US Pat. No. 3,078,912), the holder is driven directly from one another, and at the end of the welding process. This axially aligned, at a variable distance from, brings with it the risk that a rotatable holder already arranged in a bil-mount, the weld seam, torn open again and marked, that the holder can be disturbed. Namely, if the operator (24) in a remote from the socket (34) io sonal does not detachably coupling the driven holder in the correct position to a rotary drive (28) from the associated container part, so is bar and that the distances of the Holder (24), this container part is longer than required relative to the holder (34) are controlled so that rotated to the other container part. If this first takes the holder (24) to rest on the lid of the hung container for an excessively long time, a disintegration of the holder (34) occurs, 15 disturbance of the surfaces lying on top of one another or a suction device (65) in the holder (24) see whereby the entire container is actuated unusable for the lid that before the becomes. Rotary drive (28) for the holder (24) in engagement comes, the holder (24) with the lid of the known device (German Ausleger-container replaces that after uncoupling of the ao writing 1139 632) occur in which ball halves Rotary drive (28) of the holder (24) with the Dek- are to be welded together. As soon as kel has formed the weld seam while rotating freely on the container, a slip pressure must be applied and that the holder (24) will be active after a coupling to prevent the defined period of time from the socket (34) de- ball halves continued to rotate relative to each other removed and the suction device is switched off. 25 become. Adjusting the slip clutch requires 2. Device according to claim 1, characterized by a high degree of care and must frequently indicates that the socket (34) will be repeated and checked on a. Still are Sleeve (39) sits, which moves on a shaft (35) malfunctions frequently, and then it comes to the borrowed is stored and by notches (44) named destruction of the parts to be welded, a rotation of the part (C) is prevented when the 30 Furthermore, a device is known (USA.-Pa version (34) and the holder (24) with the partial specification 2 853 116), in which one of the to be welded (C, 51) are brought together. parts from the outside using 3. Device according to one of claims 1 additional roles to the required welding temperature and 2, characterized in that the suction is brought up. Correct warming is on device (78, 64, 76) a channel (104), which is difficult to achieve in this way, since those with the RoI-normally by a part (110) of an egg contact area already an unmentes (108) is closed, which can accept permissible high temperature before the device for detecting a container further inside areas with sufficient plastic part (51) and that a spring device is provided. device (112) is provided, which is normally the 40 The invention is based on the object of a Element (1081 pushes in the channel closed position. To create a device of the type mentioned above, 4. Apparatus according to claim 1 or 2, which ensures that the relative rotation of the characterized in that the suction force to be welded parts securely at the correct end of the day Devices (78,64,76) are terminated at a nor- mal point in order to achieve a flawless welding mark by means of a ball seal (57). have closed channel (55) through which a To achieve this object is the device Rod (52) leads which, when driving onto the according to the invention, characterized in that the Container part (51) opens the ball seal. Loosen the holder in a position remote from the socket. 5. Apparatus according to claim 4, characterized in that it can be coupled to a rotary drive and that indicates that the suction device (78, 76) 50 so controlled the distances of the holder from the socket Compressed air-operated valve (64) which are wel- tered that first the holder is on the cover ches is actuated when the ball seal (57) of the container standing in the socket touches down, is moved out of the channel (55). then in the holder a suction device for the lid 6. Device according to one of claims 1, that before the rotary drive for the to 5, characterized in that the Fas- 55 holder comes into engagement, the holder with the Solution (34) and the holder (24) is detached from the container by an attached cover that after the Abuptriebene Shaft (3) movable on a circular path pein the rotary drive of the holder with the cover and the rotatable holder (24) is pressed onto one part of the container with free rotation the circular path with the rotary drive (28) is in one and that the holder after a fixed amount of time stands with the distances of the holder (24) 60 span away from the socket and the suction front from the socket (34) is switched off by in the guide direction. th (20, 48) engaging cams (19, 47) are controlled. are. other container parts together in the barrel solution used. Then the holder is removed 65 lowers to the upper part of the container when the The invention relates to a device for gripping suction devices. The holder wanders Practice welding two container parts made of thermoplastic then back up and is attached to the rotary drive elastic material with a non-rotatable socket to be coupled. After reaching a certain