Sep 15, 2020
The comparison of a measured value with the nominal value of a test device is called calibration.
The following conditions are important:
– the documentation of the deviation
– the calculation of the measurement uncertainty
– the creation of a certificate
The test devices must be calibrated at regular intervals in order to achieve permanently correct measured values.
This is to gain confidence in the test devices beeing used.
After calibration, each test device is clearly marked with a test badge showing the next calibration date.
In addition, the test equipment is given a unique number to identify it and establish the connection to the correct certificate.
The calibration is documented in a calibration certificate with test equipment data and the measured values.
The certificate also lists which laboratory carried out the calibration, which facilities, procedures and reference devices were used and which ambient conditions prevailed during the calibration.
The certificates, which are issued by the performing calibration laboratory, document the condition of the test equipment during calibration.
Measuring technology: During calibration the measured value is compared to the nominal value
Related topics:
Factory Calibration
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Jul 8, 2019
For a quick measurement of plastic parts, a so called caliper is used in general.
This distance measuring device has one stick with two outside and two inside measuring legs.
The top ones of the measuring legs are fixed, while the bottom ones are movable.
Additionally, some calipers have a measurement rod to measure the depth.
With outside, inside and depth-measurement more or less every tolerance of a plastic part can be checked.
A difference in calipers can be found in how the measured values are displayed.
There are three different display types available:
– Ruled scale (Vernier)
– Dial
– Digital
It has to be noted that especially for soft plastic (like TPE), a too high pressure on the movable measuring legs will distort the measured value.
Furthermore, the measurement at small supports may lead to a tilt and hence a distortion of the measured value.
These are the reasons why, after the first measurement with caliper, additional measurement devices are necessary for exact measurement.
For example: A testing pin is better suitable for the inside measurement of a plastic part.
Image 1: Measuring technology: Calipers with vernier and digital display.
Image 2: Measuring technology: Caliper with dial display.
Related topics:
Measuring technology
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Sep 10, 2020
With the help of caliper gauges, the status “good”, “reject” or “rework” is decided during serial measurements.
This way no faulty part leaves the production line.
Like the plug gauge, the caliper gauge has a good side and a red marked reject side.
The good side represents the maximum dimension and is thicker on the gauge than the reject side.
The diameter of a shaft must not be larger than the dimension of the good side.
To prevent the shaft diameter from being to small, the reject side, which is the minimum dimension, must not fit over the shaft.
Measuring Technology:
Caliper Gauge with good and reject side
Related topics:
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Feb 27, 2024
In the age of digitalization, the transfer of data to production is essential.
The term Computer Aided Manufacturing (CAM) describes the use of computer-controlled systems and software to control manufacturing processes in industry.
This technology enables more precise and efficient production of components by automating machines and tools.
The benefits of CAM include improved quality of manufactured parts, shortened production times, and reduced manufacturing costs.
Automation Technology: Toolpaths generated by a
CAM software
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
Jan 25, 2024
In order to efficiently utilize the available resources of a company, such as manpower, machines
and materials, and to achieve production targets, planning is required.
This is known as capacity planning or scheduling.
It is a crucial process in production and business management, as it avoids bottlenecks and ensures smooth process organization.
Today, planning is supported by appropriate software that manages the manpower, machines and materials, etc. and enables them to be included in capacity planning.
Capacity planning is part of work preparation.
Example of
capacity planning using software
Related topics:
Resource planning
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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
