CN85104642B

CN85104642B - Supersonic sealing device

Info

Publication number: CN85104642B
Application number: CN85104642A
Authority: CN
Inventors: 沢祐司; 浅野明
Original assignee: Kureha Corp
Current assignee: Kureha Corp
Priority date: 1985-06-15
Filing date: 1985-06-15
Publication date: 1988-08-10
Also published as: CN85104642A

Abstract

The present invention relates to an anvil block which is provided with an ultrasonic oscillator and can receive the energy of the ultrasonic oscillator. An overlapping part of a thermoplastic thin intestine in a tubular shape is arranged between the ultrasonic oscillator and the anvil block, and is pressurized when the thermoplastic thin intestine overlapping part is sealed. A continuous sealing device of ultrasonic waves of a thin pipe is formed. A plurality of grooves which form a right angle with the marching direction of the thin film are arranged on a contact surface of the anvil block and the thin film, and thus, the sealing with certain width can be continuously formed.

Description

Ultrasonic sealing device

The invention relates to and be used for auto-filling-packing machine or Bag Making Machine, thermoplastic film is sealed the ultrasonic continuous sealing arrangement that makes it to form tubulose by ultrasonic energy.

This device is shown in Fig. 1 (1)-Fig. 1 (3).

Fig. 1 (1) shows the inside that forms tubulose and be sent to right-hand thermoplastic film 2 on tubular shaping plate, and running through a plate shaped mould of accepting is anvil block 3.Be contained on the ultrasonic oscillator, the top is hemispheric cylindrical-conical parallels 4, and the lap from the top to above-mentioned film 2 pressurizes, and the ultrasonic energy that oscillator spreads out of is sent to the lap of film, and continuously this lap is sealed.When adopting this method, parallels 4 just becomes very little with the area of contact of film 2, thereby sealed width is narrowed down, and also makes along the pulling strengrth and the peel strength T on the direction vertical with sealing surface of sealing surface to die down.

Fig. 1 (2) shows and be provided with the cross section on anvil block 3 is semi-round rib, and the top of parallels 4 is a planar shaped.Although thereby parallels 4 becomes wire with contacting of film 2, but compares with the example of Fig. 1 (1), its sealed width does not increase, so sealing intensity does not have great improvement yet.

Therefore, in order to increase sealed width, the method shown in Fig. 1 (3) has been proposed just.Just anvil block 3 is made the swivel of gear-like, and around it, be provided with many teeth, allow anvil block 3 rotate on one side, Yi Bian just can form sealing intermittently with certain width.Because this method is not to seal continuously, thereby the involution of food pack just is not suitable for to requiring the fully enclosed for example to seal.

The purpose of this invention is to provide the defective that can overcome above-mentioned original device, have abundant sealing intensity and can guarantee complete leak free ultrasonic continuous sealing arrangement.

Below, describe with regard to one embodiment of the invention with reference to Fig. 2～Fig. 4 (2), and elder generation does a simply introduction to the structure of the automatic filling machine of employing embodiment of the invention device before this.Also have, in the example shown in Fig. 2～Fig. 4 (2), the part identical with original device shown in Fig. 1 (1)-Fig. 1 (3) all adopts identical symbol.

Fig. 2 represents the integral body of auto-filling-packing machine, and Fig. 3 represents its major part.Strip thermoplastic film 2 arrives via the deflector roll 10 of suitable configuration strip form film is bent to screw-shaped shaping plate 1, has the tubulose of lap in this formation, and this lap is the longitudinal overlap part.These films 2 that are rolled into tubulose, promptly seal lap after its specification is limited by being installed in the supply packing material that passes shaping plate 1 and the be provided with dimensional control ring of annotating on the pressure jet pipe 11 12 then.Meanwhile, be sent to the below by being configured in following a pair of nip rolls.

The sealing of film 2 laps is to carry out with the anvil block 31 of accepting these parallels 4 energy by the parallels 4 that is contained on the ultrasonic oscillator.Parallels 4 is contained on the carriage 6, so that can produce the pressure of horizontal direction.The pressure of parallels 4 is produced by spring 7, and its control is undertaken by the side pressure spring.Above-mentioned ultrasonic oscillator is positioned at the outside of above-mentioned tubular film, and above-mentioned boring anchor is positioned at the inboard of above-mentioned tubular film.

Anvil block 31 improves according to the present invention.

Fig. 4 (1)-Fig. 4 (2) is the surface clearly, anvil block 31 is integral with the open circles body 3 that the double as lead ring is used, just pipe body 3 is provided with in the upper end of hollow circular-tube part 32 film that forms tubulose is remained on the lead ring 33 of institute's sizing (diameter), and has the anvil block 31 that occurs with this form of the rib that is provided with vertically on the outside face institute allocation of pipe part 32.

The height of anvil block 31 (the radial direction length of pipe body 3) is identical with the radial height of lead ring part 33.At the outer face of anvil block 31, almost spread all over (working direction of film) on its whole length, be provided with many and the rectangular ditch 36 of length direction, these ditches and flat 35 are staggered.The switch of ditch 36 should guarantee can too much not increase friction drag when anvil block 31 contacts with film.In addition, along anvil block 31 longitudinally two corner angle must make fillet, the friction drag when contacting with film to reduce.

The anvil block that employing as above constitutes seals the lap of film, just can fully guarantee the leak free width, simultaneously because ultrasonic energy concentrates on the anvil block flat that contacts as line with film, so can seal securely.Be while going the limit leak free, so seal serially with certain gait of march because of sealing again.

The as above explanation of being done, when utilizing device of the present invention that film is sealed, because maintain certain sealed width, thus sealing intensity is improved, and its sealing is successional, also just can guarantee leak tightness.Intensity and reliability that its result seals the packaging bag of formation can further improve, thereby also just can enlarge the purposes of this class packaging bag.

The oblique drawing of Fig. 1 (1)-original device of Fig. 1 (3) expression, the situation of dull and stereotyped anvil block is adopted in Fig. 1 (1) expression, and it is the situation of semi-round rib anvil block that the cross section is adopted in Fig. 1 (2) expression, and the situation of gear-like anvil block is adopted in Fig. 1 (3) expression.Fig. 2 represents to adopt in the sealing arrangement of one embodiment of the invention the whole oblique drawing of filling machine automatically.Fig. 3 is the front elevation of peripheral part of sealing arrangement shown in Figure 2.Anvil block in Fig. 4 (1)-Fig. 4 (2) presentation graphs 3, right one side of something of Fig. 4 (1) is a front elevation, left side one side of something is a section-drawing.And Fig. 4 (2) is the top view of Fig. 4 (1).

31 ... anvil block

35 ... flat

36 ... ditch

Claims

1, have ultrasonic oscillator and the anvil block of accepting the energy of this ultrasonic oscillator, the lap that forms the thermoplastic film of tubulose placed between above-mentioned ultrasonic oscillator and the anvil block seal continuously while pressurizeing, to form the ultrasonic continuous sealing arrangement of film tube, on the contact surface of above-mentioned anvil block and film, be provided with many and the roughly rectangular ditch of above-mentioned film direct of travel, it is characterized by, the lap of above-mentioned tubular film is the longitudinal edge lap, above-mentioned ultrasonic oscillator is positioned at the outside of above-mentioned tubular film, and above-mentioned anvil block is positioned at the inboard of above-mentioned tubular film.

2, according to 1 described device of claim the, it is characterized by, above-mentioned anvil block is arranged to be annotated on the cylinder outside face of pressing the jet pipe periphery, constitutes an integral body as the rib that axially is provided with along cylinder with cylinder.

3, according to 2 described devices of claim the, it is characterized by, is circular along the longitudinal edge portions of above-mentioned anvil block.

4, according to claim 2 or the 3rd described device, it is characterized by, on above-mentioned cylinder, be provided with lead ring, and the height of above-mentioned anvil block is identical with the radial height of this lead ring.