GB2207079A - Insert molded body - Google Patents

Insert molded body Download PDF

Info

Publication number
GB2207079A
GB2207079A GB08811766A GB8811766A GB2207079A GB 2207079 A GB2207079 A GB 2207079A GB 08811766 A GB08811766 A GB 08811766A GB 8811766 A GB8811766 A GB 8811766A GB 2207079 A GB2207079 A GB 2207079A
Authority
GB
United Kingdom
Prior art keywords
insert
terminal
seal material
metallic portion
molded body
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.)
Granted
Application number
GB08811766A
Other versions
GB8811766D0 (en
GB2207079B (en
Inventor
Yoshitake Sato
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.)
Yazaki Corp
Original Assignee
Yazaki Corp
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 Yazaki Corp filed Critical Yazaki Corp
Publication of GB8811766D0 publication Critical patent/GB8811766D0/en
Publication of GB2207079A publication Critical patent/GB2207079A/en
Application granted granted Critical
Publication of GB2207079B publication Critical patent/GB2207079B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/72—Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3406—Components, e.g. resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Level Indicators Using A Float (AREA)
  • Moulding By Coating Moulds (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

An insert-molded body comprises a metallic portion; a resin material integrally formed with the metallic portion therearound; and a seal material for providing a reliable seal between the metallic portion and the resin material. The seal material is permeable and elastic and has affinity. The seal material may be coated on a surface of a terminal consitituting the metallic portion in advance. The seal material covers any slight irregularities of the surface of the terminal. The coated seal material shrinks with the shrinkage of the resin material during insert-molding along a contact surface between the terminal and a terminal frame. The seal material may be constituted by a rubber liquid gasket of a semi-dry viscoelastic type mainly composed of a special synthetic rubber. The metallic portion may be insert-molded into a synthetic resin. A particular example relates to a terminal support part in a fuel level detector of a vehicle fuel tank.

Description

INSEPT-MOLDED BODY The present invention relates to an insert-molded body or part for improving the seal between an inserted metallic portion and a synthetic resin formed therearound.
BACKGROUND OF THE INVENTION An insert-molded body of this kind is used for various kinds of machines and devices. A terminal support part in a detector for detecting the liquid level of a fuel tank of a vehicle is described next as an example of a conventional insert-molded body.
In such a conventional insert-molded body, as shown in Fig. 1, a terminal 7 is integrally fixed by an insert-molding method to a terminal frame 8 generally made of synthetic resin. A contact portion of the terminal 7 with the terminal frame 8 is formed with a V-shaped or R-shaped cut, or the like, so as to provide a secure seal between the terminal 7 and the terminal frame 8.
Fig. l shows a cross-sectional view of the contact portion of the terminal 7 and the terminal frame 8 in a conventional insert-molded body. Projecting V-shaped portions 7a are disposed on both sides of the terminal 7.
The shape of the terminal 7 may be changed in various modifications. For example, as shown in Fig. 2, the terminal 7 may have V-cut portions 7b on the front and rear faces thereof, and R-cut portions 7c on both sides thereof.
As mentioned above, the attaching portion of the terminal should be formed so as to secure a proper seal of the fuel tank, but a sufficient seal cannot be obtained by a slight irregularity on a surface of the terminal 7, a slight clearance at a corner thereof, and a clearance caused by shrinkage of the resin when the terminal frame 8 is formed.
SUMMARY OF THE INVENTION To overcome the problems mentioned above, an object of the present invention is to provide an insert-molded body for obtaining a sufficient seal, in which the insert-molded body may be formed by insert-molding a metallic portion into a synthetic resin.
With the above object in view, the present invention resides in an insert-molded body comprising a metallic portion; a resin material integrally formed with the metallic portion therearound; and a seal material for providing a reliable seal between the metallic portion and the resin material. The seal material is permeable, elastic and has affinity. The seal material may be coated on a contact surface of a terminal constituting the metallic portion in advance. The seal material covers any slight irregularities of the surface of the terminal. The coated seal material shrinks with the shrinkage of the resin material during insert-molding, along the contact surface between the terminal and a terminal frame. The seal material may be constituted by a rubber liquid gasket of a semi-dry viscoelastic type mainly composed of a special synthetic rubber.The metallic portion may be insert-molded into a synthetic resin.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be more apparent from the following description of the preferred embodiments thereof in conjunction with the accompanying drawings in which: Fig. 1 is a perspective cross-sectional view of an attaching portion of a terminal in a conventional insert-molded body; Fig. 2 is a perspective view showing an example of the shape of a conventional terminal; Fig. 3 is a perspective view of a liquid level detector from the front side thereof to which the present invention is applied; Fig. 4 is a perspective view of the liquid level detector as seen from the rear side thereof; Fig. 5 is a perspective view of the liquid level detector as seen from the upper side thereof; and Fig. 6 is a perspective view showing a main portion of an insert-molded body in accordance with an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.
In Figs. 3 to 5, a liquid level detector to which the present invention is applied comprises a float 11 for floating on a liquid surface within a fuel tank for a vehicle, for example, a float arm 12 for holding the float 11 at one end thereof, a frame 13 fixed to the fuel tank and rotatably supporting the float arm 12, a contact portion 15 attached to the other end of the float arm 12 through a holder 14, and a resistor 16 opposite the contact portion 15 within the frame 13 and fixed into the frame 13 such that the contact portion 15 is slided along the resistor 16.
When the float 11 is moved upwards or downwards by a change in height of the liquid level within the tank, the float arm 12 is rotated around the frame 13 so that the contact portion 15 is slided along the resistor 16, thereby changing the contact position thereof. Accordingly, the change in resistance of the resistor in a detecting circuit for detecting the liquid level can be converted into an electric signal to display this change with an instrument.
A terminal 17 is disposed to transmit this detecting electric signal to the instrument, and is formed by a metallic piece which is electrically conductive. The terminal 17 is integrally held by a terminal frame 18 made of synthetic resin, and both ends of the terminal 17 project on the inner and outer sides of the fuel tank. The end of the terminal 17 within the fuel tank is electrically connected to the detecting circuit including the resistor 16, and the end of the terminal 17 outside the fuel tank is electrically connected to a connecting cable leading to a meter. When the liquid level within the fuel tank falls to a predetermined level, a thermistor 19 detects this state and sends an alarm to a driver.
As shown in Fig. 6, the terminal 17 of the liquid level detector constitutes a metallic portion to be inserted, and the terminal frame 18 made of synthetic resin is integrally disposed with the terminal 17 therearound.
V-cut portions 17b are disposed on the front and rear faces of the terminal 17, and R-cut portions 17c are disposed on the sides of the terminal 17. A contact portion including these cut portions and contacting the synthetic resin is coated with a seal material 20, forming a seal layer.
The seal material 20 may be constituted by a material which is permeable and elastic and has affinity, such as a rubber liquid gasket of a semi-dry viscoelastic type mainly composed of a special synthetic rubber. The contact surface of terminal: 17 is coated in advance with the seal material 20, and then the terminal frame 18 made of synthetic resin is fixed by an insert-molding method around the perimeter of the terminal 17. Thus, the seal material 20 covers or fills in any slight irregularities of the surface of the terminal, and the coated seal layer is able to shrink with the shrinkage of the resin during insert-molding time along the contact surface between the terminal 17 and the terminal frame 18, thereby preventing any minute clearances from being formed therebetween.
As mentioned above, an insert-molded body in accordance with the present invention can improve the seal thereof by a seal layer disposed between a metallic portion and a material made of synthetic resin, and therefore the insert-molded body is suitable for many applications, such as, for example, a support portion of a terminal in a liquid level detector attached to a fuel tank of a vehicle, etc.

Claims (8)

WHAT IS CLAIMED IS:
1. An insert-molded body comprising: a metallic portion; a resin material integrally formed with the metallic portion therearound; and a seal material for providing a reliable seal between the metallic portion and the resin material, said seal material being permeable and elastic and having affinity.
2. An insert-molded body as claimed in claim 1, wherein the seal material is coated on a surface of a terminal constituting the metallic portion in advance.
3. An insert-molded body as claimed in claim 2, wherein the seal material covers any slight irregularities of the surface of the terminal.
4. An insert-molded body as claimed in claim 2, wherein the coated seal material shrinks with the shrinkage of the resin material during insert-molding along a contact surface between the terminal and a terminal frame.
5. An insert-molded body as claimed in claim 1, wherein the seal material is constituted by a rubber liquid gasket of a semi-dry viscoelastic type mainly composed of a special synthetic rubber.
6. An insert-molded body as claimed in claim 1, wherein the metallic portion is insert-molded into a synthetic resin.
7. An insert-moulded body substantially as hereinbefore described with reference to, and as shown in, Figures 3, 4, 5 and 6 of the accompanying drawings.
8. Any novel feature or combination of features disclosed herein.
GB8811766A 1987-07-14 1988-05-18 Insert-molded body Expired - Lifetime GB2207079B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10698687U JPH0536671Y2 (en) 1987-07-14 1987-07-14

Publications (3)

Publication Number Publication Date
GB8811766D0 GB8811766D0 (en) 1988-06-22
GB2207079A true GB2207079A (en) 1989-01-25
GB2207079B GB2207079B (en) 1991-02-13

Family

ID=14447578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8811766A Expired - Lifetime GB2207079B (en) 1987-07-14 1988-05-18 Insert-molded body

Country Status (3)

Country Link
JP (1) JPH0536671Y2 (en)
DE (1) DE3817895A1 (en)
GB (1) GB2207079B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647987A1 (en) * 1993-09-24 1995-04-12 Honeywell Inc. Method of sealing an electrical connector
EP0664204A2 (en) * 1994-01-19 1995-07-26 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Element, preferably metallic, particularly buried in a plastic article
GB2314798A (en) * 1996-07-01 1998-01-14 Whitaker Corp A housing accommodating an electrical component
DE10205700B4 (en) * 2001-02-13 2006-12-28 Yamaha Corp., Hamamatsu Manufacturing process for a composite cast product including coating the feedstock with coating cement prior to injection molding
US7204724B2 (en) 2005-03-04 2007-04-17 Siemens Vdo Automotive Corporation Plastic flange with molded-over harness

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2931646B2 (en) * 1989-09-11 1999-08-09 フォード モーター カンパニー Float mechanism and fuel detection assembly
DE4030401A1 (en) * 1990-03-19 1991-09-26 Kromberg & Schubert DEVICE FOR MEASURING THE LIQUID LEVEL IN A CONTAINER, ESPECIALLY IN THE FUEL TANK OF A VEHICLE
US6546796B2 (en) 2001-03-15 2003-04-15 Therm-O-Disc, Incorporated Liquid level sensor
US7377163B2 (en) 2003-06-19 2008-05-27 Denso Corporation Liquid level detector
JP4165422B2 (en) 2004-03-16 2008-10-15 株式会社デンソー Liquid level detector
JP4715634B2 (en) * 2006-05-24 2011-07-06 株式会社デンソー Electrical device and method for manufacturing the same
JP5071501B2 (en) * 2010-03-23 2012-11-14 株式会社デンソー Manufacturing method of electrical device
JP5682655B2 (en) * 2012-10-15 2015-03-11 株式会社デンソー Liquid level detector
JP6723912B2 (en) * 2016-12-21 2020-07-15 愛三工業株式会社 Resin composite molding
JP7376267B2 (en) * 2019-07-19 2023-11-08 矢崎総業株式会社 connector

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB392770A (en) * 1931-07-15 1933-05-25 Carbide & Carbon Chem Corp Composite moulded articles and processes for making the same
GB657067A (en) * 1948-09-01 1951-09-12 Charles Sydney Phillips Improvements in or relating to padded rigid or hard articles
GB737855A (en) * 1952-12-19 1955-10-05 Philips Nv Improvements in or relating to bodies comprising a synthetic resin mass having a metal article partly embedded therein
GB813426A (en) * 1957-01-08 1959-05-13 Standard Telephones Cables Ltd Compact electric circuit assembly
GB897140A (en) * 1958-01-31 1962-05-23 Electric Storage Battery Co Improvements in or relating to battery covers
GB1275494A (en) * 1969-10-06 1972-05-24 Ncr Co A process for bonding a metallic member to a body of moulded polymeric material
GB1431324A (en) * 1972-09-25 1976-04-07 Rostone Corp Composite of metal and thermoset plastics and method of making it apparatus and method ofr observing and recording the clarification of a glass melt
GB2019769A (en) * 1978-04-29 1979-11-07 Vdo Schindling Forming a Seal Between a Metallic Body and a Moulded Plastics Body

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB392770A (en) * 1931-07-15 1933-05-25 Carbide & Carbon Chem Corp Composite moulded articles and processes for making the same
GB657067A (en) * 1948-09-01 1951-09-12 Charles Sydney Phillips Improvements in or relating to padded rigid or hard articles
GB737855A (en) * 1952-12-19 1955-10-05 Philips Nv Improvements in or relating to bodies comprising a synthetic resin mass having a metal article partly embedded therein
GB813426A (en) * 1957-01-08 1959-05-13 Standard Telephones Cables Ltd Compact electric circuit assembly
GB897140A (en) * 1958-01-31 1962-05-23 Electric Storage Battery Co Improvements in or relating to battery covers
GB1275494A (en) * 1969-10-06 1972-05-24 Ncr Co A process for bonding a metallic member to a body of moulded polymeric material
GB1431324A (en) * 1972-09-25 1976-04-07 Rostone Corp Composite of metal and thermoset plastics and method of making it apparatus and method ofr observing and recording the clarification of a glass melt
GB2019769A (en) * 1978-04-29 1979-11-07 Vdo Schindling Forming a Seal Between a Metallic Body and a Moulded Plastics Body

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0647987A1 (en) * 1993-09-24 1995-04-12 Honeywell Inc. Method of sealing an electrical connector
US5483743A (en) * 1993-09-24 1996-01-16 Honeywell Inc. Method of hermetically sealing a plastic connector
EP0664204A2 (en) * 1994-01-19 1995-07-26 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Element, preferably metallic, particularly buried in a plastic article
EP0664204A3 (en) * 1994-01-19 1995-11-08 Geiger Plastic Verwaltung Element, preferably metallic, particularly buried in a plastic article.
GB2314798A (en) * 1996-07-01 1998-01-14 Whitaker Corp A housing accommodating an electrical component
US5980329A (en) * 1996-07-01 1999-11-09 The Whitaker Corporation Electrical component and a housing for use therewith
GB2314798B (en) * 1996-07-01 2000-10-25 Whitaker Corp Electrical component and a housing for use therewith
DE10205700B4 (en) * 2001-02-13 2006-12-28 Yamaha Corp., Hamamatsu Manufacturing process for a composite cast product including coating the feedstock with coating cement prior to injection molding
US7204724B2 (en) 2005-03-04 2007-04-17 Siemens Vdo Automotive Corporation Plastic flange with molded-over harness
US7281960B2 (en) 2005-03-04 2007-10-16 Siemens Vdo Automotive Corporation Plastic flange with molded-over wire harness

Also Published As

Publication number Publication date
GB8811766D0 (en) 1988-06-22
DE3817895A1 (en) 1989-01-26
JPS6411718U (en) 1989-01-23
GB2207079B (en) 1991-02-13
JPH0536671Y2 (en) 1993-09-16

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20080517