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WO2003003022A1 - Procede de production d'un boitier d'un composant electrique dote d'un capteur d'acceleration - Google Patents

Procede de production d'un boitier d'un composant electrique dote d'un capteur d'acceleration Download PDF

Info

Publication number
WO2003003022A1
WO2003003022A1 PCT/EP2002/006601 EP0206601W WO03003022A1 WO 2003003022 A1 WO2003003022 A1 WO 2003003022A1 EP 0206601 W EP0206601 W EP 0206601W WO 03003022 A1 WO03003022 A1 WO 03003022A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
damping element
plastic
base material
damping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2002/006601
Other languages
German (de)
English (en)
Inventor
Josef Bärenweiler
Richard Baur
Günter Fendt
Markus Krakowitzer
Hermann Küblbeck
Alfons Wöhrl
Engelbert Wörle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aumovio Microelectronic GmbH
Original Assignee
Conti Temic Microelectronic GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Priority to DE10292875T priority Critical patent/DE10292875D2/de
Publication of WO2003003022A1 publication Critical patent/WO2003003022A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1634—Making multilayered or multicoloured articles with a non-uniform dispersion of the moulding material in the article, e.g. resulting in a marble effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/003—Details of instruments used for damping
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/023—Housings for acceleration measuring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • B29C2045/0015—Non-uniform dispersion of fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/164—The moulding materials being injected simultaneously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part

Definitions

  • the invention relates to a method for producing a housing for an electrical assembly with an acceleration sensor.
  • EP 0 675 363 A2 provides a housing for a sensor assembly which is stiffened to such an extent by a lead frame molded around by the plastic housing that the natural frequency of the housing is extremely high (> 4 kHz) and the frequency range of interest is transmitted as unadulterated as possible.
  • the connection pieces of the lead frame are shaped by
  • Stone or hammer blows can be caused.
  • EP 0 675 363 A2 also wants to do this by additionally gluing the sensor with a special, elastic adhesive and at a distance defined by a spacer from that formed from the leadframe
  • EP 0 540 071 A1 presents a sensor module which, according to the application, should in turn be constructed in such a way that the influences of mechanical stresses and resonance vibrations on the sensor are minimized, particularly in the case of
  • a recess is provided in a rigid lower housing in a floor spaced apart from the carrier body , in which the sensor is arranged in a separately enclosed unit.
  • the rigidity is chosen so that vibrations of 3 kHz and more are none
  • the sensor unit is separated from the circuit board with the evaluation circuit and is only electrically connected by means of bond wires, so that vibrations are not transmitted. (Column 6, line 40 ff.)
  • the sensor unit is fixed at a defined distance (spacer 36) to the bottom of the recess of the lower housing part with an adhesive (primerless silicone adhesive material) (column 5, line 37 ff.)
  • the interior of the housing around the sensor unit is largely filled with a gel (column 7, lines 30-50).
  • the object of the invention is therefore to provide a method for producing a housing, by means of which the transmission of the useful frequency components to the acceleration sensors in the housing is made possible in a particularly simple manner
  • the housing material itself is now to be used alternatively or additionally as a frequency-selective construction means are used and thus the coupling is optimized through the targeted design of the housing, so that accelerations over a defined temperature range are transmitted as unfiltered as possible within a trigger-relevant useful frequency range, while interference frequency components outside this frequency range are damped.
  • a plastic housing in which a damping element made of a second plastic material, different from a first plastic of the other housing, is inserted between the mounting surfaces for fastening the housing to the carrier body and locking points for the electrical assembly, in particular by two-component
  • a frequency characteristic of the housing can be achieved by utilizing the material properties that can be variably set in the plastic, in particular the elasticity and the damping due to internal friction in the plastic.
  • the formation of cavities in the damping element can further vary the frequency characteristic and thus optimize it.
  • particles made of a material with different damping properties or stiffness can be introduced into the plastic base material of the housing and the stiffness of the plastic base material can be influenced in a targeted manner by process parameters during the injection process.
  • Figure 2 section through a mounting surface of a housing with
  • FIG. 3 shows a further sectional view with a damping element with cavities which are formed vertically on both sides.
  • FIG. 4 shows a detailed view with a taper of the housing and insertion of the
  • Molded locking point Figure 6 Influencing the material rigidity during the injection process
  • FIG. 7 Manufacture of the housing from a plastic base material with locally limited admixture of additional materials
  • FIG. 1 shows a detailed view of a damping element 2 in a housing, in particular a plastic housing 1.
  • the damping element 2 consists of a second plastic material that differs from a first plastic of the other housing 1, in particular of an elastomeric material mixture, for example SEB 5, whose elastomeric phases, bswp. based on ethylene butylene, integrated as a soft component in thermoplastic materials and a Shore hardness of approx. 65 to 95 Shore A is selected.
  • an elastomeric material mixture for example SEB 5
  • SEB 5 whose elastomeric phases, bswp. based on ethylene butylene, integrated as a soft component in thermoplastic materials and a Shore hardness of approx. 65 to 95 Shore A is selected.
  • the choice of a suitable plastic material of the damping element 2 is predetermined in accordance with the desired damping characteristic of the damping element 2, this permitting a particularly large adjustment range for plastic materials due to their high variability.
  • the damping properties of the damping element 2 can be additionally influenced.
  • the damping effect is mainly due to internal friction.
  • the plastic material of the other housing 1 consists, for example, of thermoplastic two-component (2-component) injection molding material, for example PBT GF 30, a polyethylene terephthalate with glass fiber reinforcement.
  • the damping elements 2 are in the housing 1 in the path from the support body to
  • Module 3 arranged with the one or more acceleration sensors.
  • the housing 1 has mounting surfaces 11 for attachment to the carrier body and locking points 4 inside the housing (see FIG. 5) for the electrical assembly 3 with the acceleration sensor.
  • a damping element 2 is inserted in each case in the housing 1 in the area between the mounting surfaces 11 and the support points 4.
  • the housing 1 is fastened to the carrier body, for example a body frame of a motor vehicle, for example by a screw, not shown, with the mounting surface 11, the mounting surface 11 in this example having a metal insert 15 for stiffening the mounting area.
  • the position, orientation and width 26 of the damping element 2 in the housing 1 is determined beforehand in each application by means of vibration analysis and subsequently specified exactly accordingly.
  • the Alignment of the damping element 2 can have a great effect if the direction of propagation of interference and useful signal components is different.
  • the damping element 2 additionally has internal cavities 21, the dimensions of which make it possible to set the vibration behavior particularly precisely. So are in particular cavities 21 in the form of vertical slots or in the form of
  • Crosses are provided, which either extend over the entire height 27 (see FIG. 2) of the cross section or are interrupted by webs 23, as shown in FIG. 3.
  • the depth 28a / 28b of the slots also determines the damping characteristic.
  • the alignment of the slot-shaped cavities in particular is decisive if the direction of propagation of interference and useful signal components is different.
  • the damping elements 2 with slit-shaped cavities 21 have a significantly stronger damping for vibrations with a direction of propagation parallel to the slits than vibrations impinging perpendicularly.
  • Figure 1 also shows the mechanical attachment of the
  • Damping element 2 which is anchored in the housing 1 by toothing elements 12 and 22 formed in the contact area.
  • the damping element 2 in FIGS. 2 and 3 extends over the entire cross section of the housing 1 in the area between the mounting surfaces 11 and the locking points 4.
  • FIGS. 4 and 5 show damping elements 2 which are arranged in tapering of the housing 1, the remaining part 13 of the plastic housing being able to perform both a fastening and a protective function.
  • the cross-section of the housing is then filled up by the damping element 2, with cavities 21 which are continuous in the damping element or are interrupted by struts 23 are also possible in this embodiment.
  • FIG. 5 shows an additional further damping element 25 in the area of the locking point 4 formed from the housing.
  • damping characteristic of all damping elements 2 and 25 can be adjusted by changing the plastic material of the damping element
  • the vibration transmission behavior of the housing is optimized via the damping characteristic of all damping elements 2 in such a way that accelerations are transmitted as unfiltered as possible within a trigger-relevant useful frequency range, while interference frequency components outside of this frequency range are damped.
  • stiffening ribs or comparable construction means can be used in the housing and also arranged in this damping elements 2.
  • the damping elements 2 are preferably inserted directly by two-component injection molding in the manufacture of the housing 1.
  • the housing can also be glued to it
  • Module 3 in the locking point 3 or on the housing 1, for example.
  • these particles are mixed into the plastic base material of the housing, as outlined in FIGS. 6 and 7, or molded from the plastic material, that is to say, encapsulated in the housing shape by the plastic material. So most plastics can selectively particles 6, such as
  • the addition of glass particles 6 that are stiffer than the plastic base material increases the rigidity and thus the natural resonance frequency of the housing 1
  • the frequency selectivity can be set even more precisely.
  • the plastic base material with (10b) or without admixture (10a) of particles 6 are injected at different points of the housing shape 31.
  • the particles to be added can be made of solid or hollow material and, within the practical limits, can be precisely aligned with the desired frequency ratios with regard to their mass and rigidity.
  • Fibers can also be used as particles and these can be introduced into the plastic material with a predetermined orientation.
  • the frequency properties of the housing can be influenced in a targeted manner.
  • the mixture of plastic base material and particles is injected into a housing shape via an injection nozzle with a variable nozzle opening 32.
  • the rigidity of the housing can be at least locally reduced by increasing the injection pressure and / or reducing the size of the nozzle opening 32 or 30a, 30b, 30c.
  • the nozzle opening (in Fig. 7 30a, 30b, 30c) can be through a perpendicular to the. Nozzle opening movable and insertable into the nozzle opening 33, 33a, 33b or changed by a nozzle opening with a variable outer cross section 34, a narrower opening means increased stress for the melt and thus lower rigidity of the housing. In the case of fiber particles, the nozzle opening thus also affects the fiber alignment.
  • the stress on the melt and thus the rigidity of the hardened housing 1 can also be influenced.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de production d'un boîtier d'un composant électrique comprenant un capteur d'accélération ainsi qu'un boîtier correspondant. Selon ce procédé, des fractions de fréquence utile du signal d'accélération peuvent être retransmises aux capteurs d'accélération, la retransmission de fractions de fréquences perturbatrices étant néanmoins amortie. A cet effet, on incorpore au matériau du boîtier lui-même un moyen de construction, notamment des éléments amortisseurs réalisés dans une matière plastique différente de celle du boîtier. Les propriétés d'amortissement de cet élément amortisseur peuvent varier non seulement en fonction du matériau choisi mais aussi par des cavités réalisées dans cet élément amortisseur. En outre, une série de mesures complémentaires permet d'optimiser par sélection de fréquence le comportement d'amortissement.
PCT/EP2002/006601 2001-06-29 2002-06-14 Procede de production d'un boitier d'un composant electrique dote d'un capteur d'acceleration Ceased WO2003003022A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10292875T DE10292875D2 (de) 2001-06-29 2002-06-14 Verfahren zur Herstellung eines Gehäuses für eine elektrische Baugruppe mit einem Beschleunigungssensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001131424 DE10131424A1 (de) 2001-06-29 2001-06-29 Gehäuse für eine elektrische Baugruppe mit einem Beschleunigungssensor
DE10131424.8 2001-06-29

Publications (1)

Publication Number Publication Date
WO2003003022A1 true WO2003003022A1 (fr) 2003-01-09

Family

ID=7689922

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/006601 Ceased WO2003003022A1 (fr) 2001-06-29 2002-06-14 Procede de production d'un boitier d'un composant electrique dote d'un capteur d'acceleration

Country Status (2)

Country Link
DE (2) DE10131424A1 (fr)
WO (1) WO2003003022A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007033639A1 (de) 2007-07-19 2009-01-22 Conti Temic Microelectronic Gmbh Steuersystem und Verfahren zur Steuerung von zumindest einer Komponente eines Insassenschutzsystems eines Kraftfahrzeugs
CN109991436A (zh) * 2019-05-06 2019-07-09 斯沃博达汽车电子（昆山）有限公司 汽车加速度传感器固定架

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112004001390D2 (de) * 2003-10-09 2006-04-13 Conti Temic Microelectronic Fahrzeugsensor zur Erfassung einer Beschleunigung und von Körperschall
DE102006022807A1 (de) 2006-05-16 2007-11-22 Robert Bosch Gmbh Chipgehäuse mit reduzierter Schwingungseinkopplung
DE102006059741A1 (de) * 2006-12-18 2008-07-03 Siemens Ag Modularer Sensorträgeraufbau
DE102008004504B4 (de) 2007-06-22 2022-08-25 Vitesco Technologies Germany Gmbh Sensordom für ein Kraftfahrzeug mit optimierter Schwingungsfestigkeit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067536A1 (fr) * 1981-05-20 1982-12-22 Monsanto Company Procédé de polymérisation en masse pour la préparation de polymélanges ABS
DE4242789A1 (fr) * 1991-12-17 1993-07-01 Atsugi Unisia Corp
DE4406499A1 (de) * 1994-02-28 1995-09-07 Siemens Ag Sensoreinheit zum Steuern eines Insassenschutzsystems eines Kraftfahrzeugs
EP0860833A2 (fr) * 1997-02-20 1998-08-26 Polymatech Co., Ltd. Amortisseur de châssis

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0512740Y2 (fr) * 1988-01-11 1993-04-02
JPH0274868A (ja) * 1988-09-09 1990-03-14 Nissan Motor Co Ltd 圧電型力学量センサ
DE59207007D1 (de) * 1992-04-22 1996-10-02 Siemens Ag Sensoreinheit zur Steuerung eines Insassenschutzsystemes eines Fahrzeuges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067536A1 (fr) * 1981-05-20 1982-12-22 Monsanto Company Procédé de polymérisation en masse pour la préparation de polymélanges ABS
DE4242789A1 (fr) * 1991-12-17 1993-07-01 Atsugi Unisia Corp
DE4406499A1 (de) * 1994-02-28 1995-09-07 Siemens Ag Sensoreinheit zum Steuern eines Insassenschutzsystems eines Kraftfahrzeugs
EP0860833A2 (fr) * 1997-02-20 1998-08-26 Polymatech Co., Ltd. Amortisseur de châssis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007033639A1 (de) 2007-07-19 2009-01-22 Conti Temic Microelectronic Gmbh Steuersystem und Verfahren zur Steuerung von zumindest einer Komponente eines Insassenschutzsystems eines Kraftfahrzeugs
CN109991436A (zh) * 2019-05-06 2019-07-09 斯沃博达汽车电子（昆山）有限公司 汽车加速度传感器固定架
CN109991436B (zh) * 2019-05-06 2024-03-26 斯沃博达汽车电子（昆山）有限公司 汽车加速度传感器固定架

Also Published As

Publication number Publication date
DE10131424A1 (de) 2003-01-09
DE10292875D2 (de) 2004-05-27

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