Kaer KCH-2020 Bedienungsanleitung
Kaer Ultrasonic for Superior Service
Thank you for your recognition and welcome to the use of “Kaer Ultrasonic”
power ultrasonic equipment. We are making our earnest commitment to
guarantee your investment results, we
Before-sales service
Our free technical assistance is available to you from now on:
1. Recommend equipment of top choice based on your requirements for
product;
2. Examining mold drawings on your behalf to confirm optimum structure size
meeting ultrasonic process;
3. Providing assistance in manufacturing and modifying tools;
4. Sample for welding.
During-sales Service
1. Punctual deliver of equipment as per Contract;
2. Free door to door service for installation and debugging;
3. Professional training for operators;
4. Our engineering instruction will guarantee your productive manufacturing of
top-quality products.
After-sales service
1. Available within 24hours within Shandong Province and 48hours beyond
the province;
2. Our regular return visits ensure continuous improvement of our service
quality.
Our cooperation starting from today, and
Our friendship extending from here!
I. General Information
Ultrasonic plastic welder is mainly used for secondary joining of thermoplastics.
Compared with other traditional processes (such as gluing, electric
heat-joining, or screw tightening), it has remarkable advantages like high
productivity, sound welding quality, environmental protection and energy
saving, among others.
Working principle of ultrasonic plastic welder: the welder converts the electric
energy into ultrasonic energy through the ultrasonic transducer (i.e.
high-frequency mechanical vibration energy with the frequency exceeding the
threshold of human’s auditory sense). Conducted to the plastic work piece
through the welding head, such ultrasonic energy melts down the joint face of
the plastic work piece after rubbing the joint face violently with ultrasonic
frequency at the speed of tens of thousands of times per second and with
certain amplitude. The transient pressure maintained at the work piece after
stopping vibration makes two pieces of weldment solidify together in the form
of molecular interlinkage. Generally, the welding time is less than 1 second,
but the weld strength compares favorably with that of a weldment itself.
By adopting electronic program control and built-in full automatic protective
circuit.
KCH series ultrasonic plastic welder has such features as high automation,
easy and safe operation, stable and reliable running, etc.
KCH series ultrasonic plastic welder is applicable for butt welding of
thermoplastics. With its welding head replaceable according to the customers’
requirements, the welder can also be used for processing such as rivet
welding, spot welding, embedding, cutting, etc.
II. Main Technical Parameters
1. Operational power supply: AC 220V±10V/50HZ
2. Operational air pressure: 0.15-0.8MPa
3. Apparent power of transducer:
□1000W □1500W □2000W □2600W □4200W
4. Ultrasonic frequency:
□15KHz □20KHz □28KHz □40KHz
5. Delay time: 0.01-9.99 seconds
6. Weld time: 0.01-9.99 seconds
7. Dwell time: 0.01-9.99 seconds
8. Stroke of welding head: □50mm □75mm □80mm □100mm
9. External dimensions:
Frame: (L)×(W)××(H) (mm)
Powersupply: (L)×(W)××(H) (mm)
III. System Configuration
KCH series ultrasonic plastic welder consists of ultrasonic power generator,
program control system, automatic protection system, transducer system,
pneumatic control system, and frame.
The system structure is shown as the following figure:
Power generator
Automatic protection systemTransducer system
Pneumatic control system
Program control system
Frame
IV. Installation and Commissioning
1. Installation of the equipment
(1) The equipment should be installed on the solid table board, with a space
of 150mm in the rear.
(2) Air inlet of air filter shall be connected tightly with air supply. Air supply
shall be equipped with another air filter, to ensure the cleanness and
dryness of air supply, and prolong service life of pneumatic components.
(3) Since the welder has relatively higher requirements for power supply,
unstable voltage will exert direct influence on the welding effect, or in an
even more serious case, result in shortening service life of power
generator or burning it! Areas with unstable voltage require a voltage
stabilizer with fluctuation of output voltage below 2% and the output
power double the nominal power of the welder.
(4) Before operating the welder, make sure to connect the ground wire
properly, with ground resistance less than 0.5ohm.
Never operate the welder without proper grounding!
(5) Before switching on, please make sure that proper power supply and air
supply are used, the cable wires have been connected correctly, the limit
of welding head has been well set, and the hands and other parts are at
safe operation position.
(6) Rotate the limit screw below the welding head support, adjust the
cylinder stroke (adjusting air pressure to zero and pulling the welding
head support up and down with a hand to observe the stroke), for
facilitating the work piece to enter and exit the tooling.
(7) Unfasten the locking wrench adjacent to the post, adjust the height of the
welder according to the heights of the tooling and the work piece, and fix
it tightly (this function is not available to some models.)
(8) Calibrate the positions of welding head, work piece and tooling: If the
bottom surface of the welding head isn’t fit closely with the upper surface
of the work piece, adjust the screw for leveling the welding head off, or
adjust the tooling by means of padding with paper, and finally, lock them.
(9) Adjust air pressure to 0.14MPa, press the pneumatic testing button, or
press the operation button in the mode of manual gear, and the welding
head will descend. Re-check the positions of welding head, work piece
and tooling, and if there’s no problem, adjust the limit screw finely and
appropriately according to the depth of fusion, and lock it. The welding
head will rise to its original position by pressing the pneumatic testing
buttons like emergency stop or reset button.
2. Commissioning the operational parameters
(1) Parameters of working frequency
The power generator of this ultrasonic welder can track the working frequency
of the transducer automatically within certain range of working frequency (i.e.
working frequency band). However, influenced by external factors, changes of
the transducer’s natural frequency may exceed the generator’s working
frequency band, which may lead to the fault of frequency deviation. Operating
the welder under the status of frequency deviation will cause poor welding
quality, or more seriously damage the ultrasonic power generator or
transducer system. Therefore, in the event of frequency deviation, make sure
to calibrate it.
zPhenomena of faults of frequency deviation:
a. The degree of frequency deviation is too high, and frequency deviation
protection occurs.
b. No load output current is very high, or even overload protection occurs.
c. The welding head squeals, with serious heating up.
zMethod of commissioning:
Click the ultrasonic testing button for short time, observe the indicated
value of the degree of frequency deviation (frequency deviation protection
will occur when the degree of frequency deviation exceeds 20%); adjust
the frequency-adjusting knob finely to raise or lower the working frequency
band, and then click the ultrasonic testing button, observe if the indicated
value of the degree of frequency deviation is lower than the previous value;
if lower, continue to adjust the frequency-adjusting knob in the previous
direction, and simultaneously, click the ultrasonic testing button in short
time, observe the indicated value of the degree of frequency deviation until
the degree of frequency deviation is adjusted to the minimum (less than
10%). If higher than the previous value, adjust the frequency-adjusting
knob in reverse direction, and simultaneously, click the ultrasonic testing
button in short time, observe the changes in the degree of frequency
deviation until the degree of frequency deviation is adjusted to the
minimum.
zNotes for the adjustment:
a. The minimum degree of frequency deviation (less than 10%) and the
minimum no load (less than 0.5A) are the standards for frequency
control.
b. In case of errors with transducer system or serious frequency deviation
for connection failure or misconnection of transducer, it will not work to
correct frequency now. The transducer and connecting wires will have
to be adjusted or replaced.
c. In special unexpected cases such as replacing or repairing the
components of transducer (like acoustic welding head), the occurrence
of frequency deviation protection during operation, and the first time of
switching on and operation, it requires calibrating the working frequency
band of the generator.
(2) Load parameters
This system can adjust load parameters automatically according to the load.
Under normal status, the load under no load is the lowest (less than 0.5A), and
the load is related to the factors like the welded work piece and the welding
pressure in the process of welding. Over high load may result in overload
protection. Some models can limit the load automatically.
(3) Pressure parameters
Selection and adoption of pressure parameters often relates to such factors as
the welding area and the material of the weldment, and the amplitude of
welding head, etc. The pressure parameters exert direct influence on the
output load of the welder. Generally, the higher for the pressure, the higher
output load. However, over-high pressure will cause overload protection or
reduction of effective output. Therefore, pressure parameters shall be selected
as appropriate. For common small work pieces or non-crystallized materials
such as ABS, start adjustment from 0.2MPa; for larger work piece or
semi-crystallized materials such as polypropylene, polyethylene, or the
weldment with higher requirements for sealing, start adjustment from 0.4MPa.
(4) Parameters for delay time
Delay time is the time for triggering ultrasonic. On the basis of the length of
time parameter, the welder may run in the following three modes (Note: some
models control ultrasonic triggering through adjusting the position of the
impact-piece of travel switch.)
a. Mode of advance triggering: the pickup current of the welder is
comparatively lower under this mode, which is often used for the
situation with difficulties in starting the welder.
b. Mode of critical triggering: the pickup current of the welder is unstable
under this mode, but the welding quality is comparatively better.
c. Mode of hysteretic triggering: the pickup current of the welder is
comparatively higher under this mode, but it can ensure relatively
accurate weld time.
Actual mode of triggering shall be selected according to actual commissioning
situation. For example, in the event of higher pickup current of the welder or
abnormalities, shorten the delay time appropriately and select the mode of
advance triggering.
(5) Parameters for weld time
Weld time is the time for outputting the ultrasonic welding power, which
influences the quality of welding directly. Just like the pressure parameters, its
selection relates to such factors as the welding area and the material of the
weldment, and the amplitude of welding head, etc. Generally, too short weld
time will lead to insufficient weld strength, while too long weld time will exert
negative effect on the appearance of the weldment. Actual selection shall be
determined by means of testing.
In practical application, the influences of the pressure parameters and the
parameters for weld time on the weldment are a couple of correlative factors.
Moderately higher pressure will shorten the weld time; vice versa, to achieve
longer weld time, lower the pressure appropriately.
(6) Parameters for dwell time
Dwell time refers to the time for cooling and solidifying the weldment at certain
pressure so as to prevent deformation of the weldment and loosening of the
welds after completion of welding. Too short dwell time will affect the strength
of the finished weldment, while too long dwell time will impact the work
efficiency. Actual selection shall be determined according to the weldment. The
fusion face of common small weldment will cool down in a short time, with very
short dwell time. Big weldment or the weldment with high requirements for
sealing performance or compression resistance will require relatively longer
dwell time.
3. Normal operation
After installing and commissioning the welder, set the option switch at
automatic gear, and then the welder is ready for normal operation. Put the
work piece to be welded into the tooling, and press the operation button on
operation panel with both hands, the welder will fulfill the complete welding
process automatically. In the event of any accident during the running of the
welder, press the emergency stop button in the middle of operation panel, the
welder will stop working immediately, and return to its original status. The
emergency stop button of some models is self-locking. Therefore, to make the
welder resume normal working, you have to turn the emergency stop button
right to eject and reset it.
V. External View of the Product
1. Tooling
2. Acoustic welding head
3. Shield of the transducer
4. Pressure gauge
5. Pressure adjusting
6. Dwell time
7. Delay time
8. Option switch
9. Weld time
10. Counter
11. Fall speed regulating
12. Rising speed regulating
13. Frequency deviation degree
14. Frequency control
15. Load indication
16. Power supply indication
17. Frequency deviation indication
18. Ultrasonic testing
19. Operation button
20. Emergency stop button
(Front)
Dieses Handbuch passt für folgende Modelle
2
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