US 12,122,082 B2Granted

Method and device for inspecting injection-molded parts, in particular pipette tips

AssigneesJakob Kammerloher, Hekuma GmbH

InventorJakob Kammerloher

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Abstract

Method for inspecting elongate injection-molded parts having an axis of symmetry in a holding device, comprising: detecting a reference area in a first measurement area of the part in the holding device through detection means, wherein the reference area is selected such that the axis of symmetry of the part can be calculated from the measurement data of the reference area, calculating the axis of symmetry from the measurement data of the measured reference area, measuring the spatial position of a section of axis of symmetry of a second measurement area, spaced apart from the first measurement area in axial direction, of the part, and determining whether the spatial position of the section of axis of symmetry, measured in the third step, of the part, coincides in the second measurement area with the axis of symmetry calculated in the second step, or not.

Claims16

Dependent claims

A method for inspecting elongate injection-molded parts having an axis of symmetry, in a holding device, comprising the following steps:

detecting a reference area extending in axial direction of the injection-molded part in a first measurement area of the elongate injection-molded part in the holding device through an electronic detector, wherein the reference area is selected such that a first axis of symmetry of the injection-molded part can be calculated according to its orientation, shape, and position in the reference area from the measurement data of the reference area (first step),
calculating the first axis of symmetry in the reference area from the measurement data of the measured reference area (second step),
measuring the spatial position of a section of axis of symmetry of a second measurement area, spaced apart from the first measurement area in axial direction, of the elongate injection-molded part including an orientation and position of an axis of symmetry within the section of axis of symmetry (third step), and
determining whether the spatial position of the axis of symmetry of the section of axis of symmetry, measured in the third step, of the injection-molded part, coincides in the second measurement area with the axis of symmetry calculated in the second step, or not.

1 more element

A device for inspecting elongate injection-molded parts having an axis of symmetry, in a holding device, comprising:

a calculating unit, in which a reference area at the injection-molded part to be measured is pre-set as calculation base,
wherein a reference axis can be calculated from the data of the reference area,
at least an electronic detector which is aimed at an injection-molded part held in the holding device, transverse to an axis of symmetry thereof and is formed such that
the electronic detector detects a reference area at the injection-molded part corresponding to the reference area pre-set in the calculating unit, and calculates a first axis of symmetry within the measured reference area according to the orientation, shape, and position in the reference area from the measurement data, and
at least a further electronic detector for measuring an axis of symmetry in a second measurement area at a distance in axial direction from a first measurement area on the basis of an orientation and position of the injection-molded part within a section of axis of symmetry in the second measurement area,
wherein the calculating unit is formed for determining an agreement or not agreement of the spatial position of the axis of symmetry in the section of axis of symmetry in the second measurement area and the calculated axis of symmetry in the reference area.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/285,442Filed 17 Oct 2019
Priority: DE 10 2018 126 019.919 Oct 2018
Published: US 2021/0339446 A14 Nov 2021
Granted: 22 Oct 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B29C 45/7686
Measuring, controlling or regulating: the ejected articles, e.g. weight control
G01B 11/245
For measuring contours or curvatures: using a plurality of fixed, simultaneously operating transducers
G01B 11/27
For measuring angles or tapers; for testing the alignment of axes: for testing the alignment of axes
B29C 2945/76103
Dimensions, e.g. thickness: shrinkage, dilation, dimensional change, warpage