IE55437B1 - Assembly using ultrasonics - Google Patents

Assembly using ultrasonics

Info

Publication number
IE55437B1
IE55437B1 IE165/84A IE16584A IE55437B1 IE 55437 B1 IE55437 B1 IE 55437B1 IE 165/84 A IE165/84 A IE 165/84A IE 16584 A IE16584 A IE 16584A IE 55437 B1 IE55437 B1 IE 55437B1
Authority
IE
Ireland
Prior art keywords
shell
studs
cover member
assembly
magnet assembly
Prior art date
Application number
IE165/84A
Other versions
IE840165L (en
Original Assignee
Stc Plc
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 Stc Plc filed Critical Stc Plc
Publication of IE840165L publication Critical patent/IE840165L/en
Publication of IE55437B1 publication Critical patent/IE55437B1/en

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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A plastics cover plate 6 is assembled to a plastics shell 1, e.g. to form the main portion of a moving coil electro-acoustic transducer of which the shell contains the magnet assembly 2, 3, 4, the plate 6 having a number - six in one case - of inwardly-extending studs 7. The assembly involves placing the cover plate 6 in position when the magnet assembly 2, 3, 4 is in the shell 1, and then applying ultrasonic vibrations and pressure to the cover plate. This causes the studs to collapse around the magnet assembly 2, 3, 4 and the inside of the shell 1, thus effectively locating the magnet assembly in the shell. There is also an energy concentrator 11 on the shell 1, and this, in addition to the function of concentrating the applied energy acts as a seal, since it also collapses to secure the shell 1 and the cover 6 together. Although the method has been described as applied to the assembly of a particular transducer, it should be noted that it is not so limited.

Description

This invention relates to a method of and apparatus for the assembly of a multi-component device.
According to the invention there is provided a method of assembling a device, which includes one or more components located inside a two or more piece structure, in which the internal component or components is or are assembled within a shell which forms part of the structure and are accurately located therein, in which a cover member which also forms part of the structure is provided for the device, which cover member has studs which extend inwardly when the cover member is in use, and in which the assembly involves the steps of placing the cover member over the shell with the internal component or components in position, the studs then being in engagement with the inside of the shell and with at least one internally-located component, and subjecting the cover member to ultrasonic vibrations and pressure, which causes the studs to deform due to the pressure and to the effect of the ultrasonic vibrations, which deformation causes the studs to collapse so that the -cover member is moved inwardly of the device and the studs collapse against the inside of the shell and around part of a said internally-located component or components An example of the sort of device which may be assembled by the above method is an electro-acoustic transducer, and the invention is further described as applied to the assembly of parts of a moving coil - 2 - I - 2 - b a 4 3 ϊ transducer such as described in our British Patent Specification No. 2 114 855B.
Thus the invention also provides a method of assembling an electro-acoustic transducer assembly, which 5 includes a magnet assembly accurately located within a shell which forms part of a two-piece structure, in which the structure also includes a cover member having studs which extend inwardly when the cover member is in us.e, and in which the assembly involves the steps of placing 10 the cover member over the shell with the studs each in engagement with the inside of the shell and with part of the magnet assembly, and subjecting the cover member to ultrasonicvibrations and to pressure as a result of which the studs deform due to the pressure and to the 15 effect of the ultrasonic vibrations, which deformation causes the studs to collapse so that the cover member is moved inwardly of the device and the studs collapse against the inside of the shell and around part of the magnet assembly to secure the magnet assembly in place 20 within the shell.
An embodiment of the invention will now be described with reference to the accompanying drawing, which shows in Figures 1 and 2 two stages of the novel assembly technique.
Referring now to the drawing, Figure 1 is a cross section of a circular component assembly, in the present case an electro-acoustic transducer. An outer plastics shell 1, supports three components 2, 3 and 4, which have been prepositioned with a controlled gap 5.
In the case of the transducer, these three components are -the transducer's magnetic circuit, these being a ring-shaped magnet 2, disc-shaped pole-piece 3 and yoke plus polepiece 4. The controlled gap 5 receives the moving, coil of the transducer. A plastics cover 6, has six 35 circular studs such as 7, moulded integral with it. To complete the assembly, the above components are supported on a solid base 8, and pressure and ultrasonic vibrations are applied thereto by mean6 of a transducer 9. This 3 causes the studs 7 to deform due to the vibration and to collapse around the components 2 and 4, thus retaining them in the preset position. At the same time an energy concentrator 11, which is part of the shell, (Figure 1) 5 fuses into the cover and completes the seal.
Thus the now collapsed studs retain the components of the microphone in the correct relative positions, while the joint formed by the energy concentrator holds the microphone together.
After the assembly described above, the transducer is completed by assembling to it the diaphragm and moving coil, plus the front cover. Thus the final product in the present example is a transducer of the type described in the above application. Although the 15 method has been described as applied to the assembly of an electro-acoustic transducer, it should be noted that it is not so limited. Further, the number of components involved is not critical; any number of components can be secured. Further, the plastics parts, such as the cover 20 6, can be any shape. The studs such as 7, need not be circular in cross-section and can be of any number. The only critical factor is that their total strength is significantly less than the strength of the main structure.

Claims (6)

1. A method of assembling a device, which includes one or more components located inside a two or more piece structure, in which the internal component or components is or are assembled within a shell which forms part of the structure and are accurately located therein, in which a cover member which also forms part of the structure is provided for the device, which cover member has studs which extend inwardly when the cover member is in use, and in which the assembly involves the steps of placing the cover member over the shell with the internal component or components in position, the studs then being in engagement with the inside of the shell and with at least one internally-located component, and subjecting the. cover member to ultrasonic vibrations and pressure, which causes the studs to deform due to the pressure and to the effect of the ultrasonic vibrations, which deformation causes the studs to collapse so that the cover member is moved inwardly of the device and the studs collapse against the inside of the shell and around part of a said internally-located component or components.
2. A method of assembling an electro-acoustic transducer assembly, which includes a magnet assembly accurately located within a shell which forms part of a two-piece structure, in which the structure also includes a cover member having studs which extend inwardly when the cover member is in use, and in which the assembly involves the steps of placing the cover member over the shell with the studs each in engagement with the inside of the shell and with part of the magnet assembly, and subjecting the cover -member to ultrasonic vibrations and to pressure as a result of which the studs deform due to the pressure and to the effect of the ultrasonic vibrations, which deformation causes the studs to collapse so that the cover member is moved inwardly of the device and the studs collapse against the inside of the shell and around part of the magnet assembly to locate the magnet assembly within the shell.
3. A method as claimed in claim 1 or 2, in which the region of the shell to be secured to the cover has a portion therein which forms an energy concentrator, and in which the heating causes the energy concentrator to 5 fuse to complete the seal of the cover to the shell.
4. A method of assembling an electro-acoustic transducer assembly, substantially as described with reference to the accompanying drawing.
5. An electro-acoustic tranducer assembly assembled 10 by the method of claims 1, 2, 3 or 4. MACLACHLAN & DONALDSON Applicants' Agents,
6. 47 Merrion Square, DUBLIN 2.
IE165/84A 1983-02-04 1984-01-25 Assembly using ultrasonics IE55437B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08303175A GB2134847B (en) 1983-02-04 1983-02-04 Assembly using ultrasonics

Publications (2)

Publication Number Publication Date
IE840165L IE840165L (en) 1984-08-04
IE55437B1 true IE55437B1 (en) 1990-09-12

Family

ID=10537505

Family Applications (1)

Application Number Title Priority Date Filing Date
IE165/84A IE55437B1 (en) 1983-02-04 1984-01-25 Assembly using ultrasonics

Country Status (6)

Country Link
AU (1) AU570029B2 (en)
GB (1) GB2134847B (en)
HK (1) HK76387A (en)
IE (1) IE55437B1 (en)
NZ (1) NZ206901A (en)
SG (1) SG39987G (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK153674C (en) * 1985-03-25 1988-12-27 Nunc As PROCEDURE FOR MANUFACTURING A PLASTIC CONTAINER
JPH04104793U (en) * 1991-02-22 1992-09-09 株式会社キヤツトアイ Motorcycle parts
JP3877016B2 (en) * 1996-07-05 2007-02-07 スター精密株式会社 Ultrasonic welding method of resin case
DE102009046816A1 (en) * 2009-11-18 2011-05-19 Robert Bosch Gmbh Process for welding preparation of two plastic components

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476297A (en) * 1967-12-20 1969-11-04 Rexall Drug Chemical Closured container and method of making same
DE2338908C3 (en) * 1973-08-01 1981-06-04 Elbatainer Kunststoff- Und Verpackungsgesellschaft Mbh, 7505 Ettlingen Ultrasonic welding method and device for the liquid-tight welding of a closable pouring nozzle into a thin-walled liquid container and a pouring nozzle therefor
DE2540721A1 (en) * 1975-09-12 1977-03-17 Dynamit Nobel Ag METHOD OF MANUFACTURING CARTRIDGE CASES
MC1123A1 (en) * 1976-07-20 1977-08-12 G Grandclement SOLENOID VALVE
FR2369076A1 (en) * 1976-11-02 1978-05-26 Chausson Usines Sa PROCESS FOR
JPS5386772A (en) * 1977-01-12 1978-07-31 Polyplastics Kk Method for bonding different materials
JPS5388883A (en) * 1977-01-17 1978-08-04 Polyplastics Kk Supersonic welding method
GB2114855B (en) * 1982-02-09 1985-10-23 Standard Telephones Cables Ltd Moving coil transducer

Also Published As

Publication number Publication date
GB2134847B (en) 1985-11-13
AU570029B2 (en) 1988-03-03
SG39987G (en) 1987-07-24
GB8303175D0 (en) 1983-03-09
HK76387A (en) 1987-10-23
IE840165L (en) 1984-08-04
AU2394384A (en) 1984-08-09
GB2134847A (en) 1984-08-22
NZ206901A (en) 1986-06-11

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Legal Events

Date Code Title Description
MM4A Patent lapsed