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WO1997012732A1 - Poignee d'ustensile et son procede de fabrication - Google Patents

Poignee d'ustensile et son procede de fabrication Download PDF

Info

Publication number
WO1997012732A1
WO1997012732A1 PCT/US1996/015946 US9615946W WO9712732A1 WO 1997012732 A1 WO1997012732 A1 WO 1997012732A1 US 9615946 W US9615946 W US 9615946W WO 9712732 A1 WO9712732 A1 WO 9712732A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
core element
handle
resin
mold
Prior art date
Application number
PCT/US1996/015946
Other languages
English (en)
Inventor
John P. Vanderhoef
Edward St. Yves
Theodore S. Babcock
Original Assignee
Kellogg Brush Manufacturing Co.
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 Kellogg Brush Manufacturing Co. filed Critical Kellogg Brush Manufacturing Co.
Publication of WO1997012732A1 publication Critical patent/WO1997012732A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • 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
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • 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
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/463—Grips, handles

Definitions

  • the utensil handle ofthe present invention is formed in a mold having a cavity shaped in the form of the desired final handle shape.
  • One side ofthe cavity is formed by a core element or slide movable from a first position in which the end ofthe core element defines one surface of the finished handle and a second position in which the core element projects a pre-determined distance into the mold cavity.
  • a structural or rigid resin is injected into the reduced cavity and allowed to at least partially harden.
  • the core element is then withdrawn to its first position and a second resin having a rubbery characteristic is injected in to the space formed by the withdrawal ofthe core element face from the cavity.
  • a unitary utensil handle is formed which provides a body of structural resin with an inset of a rubbery material which provides a pleasing grip and appearance.
  • the present invention relates to a utensil handle which has pleasing grip characteristics and also to a method of making that handle.
  • handles commonly employed for kitchen, bathroom, and general cleaning utensils are typically formed by injection molding and comprise a single thermoplastic resin material. While some proposals have been made previously for multiple component handles, these handles have typically been assembled from e.g., by adhesive or using interlocking parts, from separately formed elements. The cost associated with separately forming the elements has prevented the widespread adoption of such constructions.
  • a utensil handle which provides satisfyingly ergonometric handling characteristics; the provision of such a handle which provides a comfortable grip; the provision of such a handle which provides a plesing appearance; the provision of such a handle which has an essentially unitary construction and does not have to be assembled; the provision of such a handle which employs a structural material for strength but includes a rubbery gripping surface; the provision of a method of making a utensil handle which efficiently produces a pleasing product; the provision of such a method which can be implemented in a cost effective manner; the provision of such a method which is highly reliable and which is relatively simple and inexpensive.
  • the utensil handle of the present invention comprises a first elongate portion formed of a structural resin and. set into the first portion, an inset of a rubbery resin providing a pleasing grip surface and. preferably, a contrasting color.
  • the handle is formed in a mold providing an elongate cavity having the dimensions and shape ofthe desired product.
  • One surface ofthe cavity is formed by a core element which is movable from a first position in which the face of the core element defines a portion of the overall surface of the full cavity and a second position in which the core element projects a predetermined distance into the cavity. With the core element in its second or forward position, a structural thermoplastic resin is injected into the reduced cavity thereby to form the first portion of the utensil handle.
  • the core element is withdrawn to its first position and a resin having a rubbery characteristic is injected into the space formed by the withdrawal of the core element. This second resin bonds with the first so that the finished handle is essentially an integrated structure.
  • Figure 1 is a side view of a handle constructed in accordance with the present invention
  • Figure 2 is a sectional view ofthe handle taken essentially along the line 2-2 of Figure 1 ;
  • Figure 3 is a side view with parts broken away of a mold assembly for forming the handle of Figure 1 with a core element of the assembly in a forward position;
  • Figure 4 is a view similar to Figure 3 with the core element in a withdrawn position; and Figure 5 is a view similar to Figures 3 and 4 showing the injection of a second resin into the mold.
  • the handle illustrated there is elongate and includes a slightly arched gripping portion 1 1 and a socket portion 13 for receiving a utensil such as a brush or sponge head.
  • the major portion of the handle structure is formed of a structural or rigid thermoplastic resin. designated by reference character 17 in Figure 2.
  • a grip pad 19 formed of a rubber)' resin and designated by reference character 21 in Figure 2.
  • the grip pad 19 is intimately bonded with the structural resin portion 17 so that the handle is effectively an integral structure.
  • an injection mold assembly is designated generally by reference character 25.
  • Mold assembly 25 provides an elongate cavity 27 which is generally in the shape desired for the handle of Figure 1.
  • a slide or movable core element 31 Set in to the main mold body, designated by reference character 29, is a slide or movable core element 31.
  • the front face of core element 31 has a surface, designated by reference character 33. which defines the exterior surface ofthe grip pad 19 ofthe completed handle.
  • Die assembly 25 also includes a second core element 35 which permits forming of the socket portion 13. This core element however, does not move during the actual injection processes as does the core element 31.
  • a rigid or structural resin such as polypropylene is injected into the cavity 27 so as to fill the reduced cavity 27. Polystyrene or polyethylene might also be used.
  • the core element 31 is withdrawn to a position where its front face 33 corresponds with the final desired surface ofthe grip pad 19. Movement ofthe core element 31 is controlled by a wedge element 41 which is in turn moved by an air cylinder 43 or other mechanical means.
  • the core element 31 is biased by springs (not shown) towards its retracted position so that, when the wedge member 41 is lowered, as shown in Fig. 4 , the core element will withdraw the face 33 from the cavity.
  • the second resin is preferably a rubbery thermoplastic elastomer (TPE) resin such as that sold by Monsanto under the tradename Santoprene or that sold by Shell under the tradename Kraton.
  • TPE rubbery thermoplastic elastomer
  • the mold is opened, (along part lines not shown) and the completed piece is removed. Since the second resin is injected immediately after forming of the structural resin 34, the two resins bond together intimately so that the final handle assembly is essentially an integral structure though it comprises both the hard structural resin and a rubber.' resin providing a pleasing grip surface.
  • the appearance can be further enhanced by employing resins of contrasting colors, e.g. white for the structural resin and blue for the rubbery resin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention porte sur une poignée d'ustensile présentant une tenu en main caractéristique en raison de l'emploi de plusieurs résines, ainsi que sur son procédé de fabrication.
PCT/US1996/015946 1995-10-05 1996-10-04 Poignee d'ustensile et son procede de fabrication WO1997012732A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53958895A 1995-10-05 1995-10-05
US08/539,588 1995-10-05

Publications (1)

Publication Number Publication Date
WO1997012732A1 true WO1997012732A1 (fr) 1997-04-10

Family

ID=24151866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/015946 WO1997012732A1 (fr) 1995-10-05 1996-10-04 Poignee d'ustensile et son procede de fabrication

Country Status (1)

Country Link
WO (1) WO1997012732A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2768642A1 (fr) * 1997-09-19 1999-03-26 Fiskar Uk Ltd Instrument ayant un manche all0nge
WO2000040374A1 (fr) * 1999-01-04 2000-07-13 Ceuro Produccion Robotica, S.A. Manche pour ustensiles de nettoyage et analogues
GB2359268A (en) * 2000-02-17 2001-08-22 Fiskars Uk Ltd Knife Handle
EP1798112A3 (fr) * 2005-12-15 2007-09-12 Peugeot Citroën Automobiles S.A. Procédé de moulage par injection plastique d'une pièce de garnissage, et pièce de garnissage issue de ce procédé
USD571955S1 (en) 2007-03-07 2008-06-24 American Safety Razor Shaving razor
EP2886266A1 (fr) * 2013-12-23 2015-06-24 Arcos Hermanos, S.A. Structure améliorée de manches de couteaux avec support d'identification visuelle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516151A2 (fr) * 1991-05-29 1992-12-02 Spotless Plastics Pty. Ltd. Cintre co-injecté et matière plastique, procédé pour mouler les cintres et dispositif pour la mise en oeuvre du procédé
WO1993016846A1 (fr) * 1992-02-24 1993-09-02 Felo-Werkzeugfabrik Holland-Letz Gmbh Procede de fabrication d'un manche d'outil et outil permettant de mettre le procede en ×uvre
DE4224171A1 (de) * 1992-07-22 1994-01-27 Bosch Gmbh Robert Spritzgußteil sowie Verfahren und Spritzgießwerkzeug zum Herstellen von Spritzgußteilen
GB2274615A (en) * 1993-01-29 1994-08-03 Moss Prod Pty Ltd Moulded plastic handle and method of its manufacture
DE4406149A1 (de) * 1993-03-27 1994-09-29 Waldemar Eerenstein Zangenartiges Werkzeug
GB2281531A (en) * 1993-09-02 1995-03-08 Esseplast Spa Procedure for producing a shovel of plastic material having a flexible front edge
DE29508990U1 (de) * 1995-05-31 1995-08-17 M + C Schiffer GmbH, 53577 Neustadt Zahnbürste
US5446941A (en) * 1993-03-02 1995-09-05 Marshalltown Trowel Company Plastic molded trowel handle having fingerguard and palm grip

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516151A2 (fr) * 1991-05-29 1992-12-02 Spotless Plastics Pty. Ltd. Cintre co-injecté et matière plastique, procédé pour mouler les cintres et dispositif pour la mise en oeuvre du procédé
WO1993016846A1 (fr) * 1992-02-24 1993-09-02 Felo-Werkzeugfabrik Holland-Letz Gmbh Procede de fabrication d'un manche d'outil et outil permettant de mettre le procede en ×uvre
DE4224171A1 (de) * 1992-07-22 1994-01-27 Bosch Gmbh Robert Spritzgußteil sowie Verfahren und Spritzgießwerkzeug zum Herstellen von Spritzgußteilen
GB2274615A (en) * 1993-01-29 1994-08-03 Moss Prod Pty Ltd Moulded plastic handle and method of its manufacture
US5446941A (en) * 1993-03-02 1995-09-05 Marshalltown Trowel Company Plastic molded trowel handle having fingerguard and palm grip
DE4406149A1 (de) * 1993-03-27 1994-09-29 Waldemar Eerenstein Zangenartiges Werkzeug
GB2281531A (en) * 1993-09-02 1995-03-08 Esseplast Spa Procedure for producing a shovel of plastic material having a flexible front edge
DE29508990U1 (de) * 1995-05-31 1995-08-17 M + C Schiffer GmbH, 53577 Neustadt Zahnbürste

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2768642A1 (fr) * 1997-09-19 1999-03-26 Fiskar Uk Ltd Instrument ayant un manche all0nge
GB2329354B (en) * 1997-09-19 2002-09-18 Fiskars Uk Ltd An implement with an elongate handle
WO2000040374A1 (fr) * 1999-01-04 2000-07-13 Ceuro Produccion Robotica, S.A. Manche pour ustensiles de nettoyage et analogues
GB2359268A (en) * 2000-02-17 2001-08-22 Fiskars Uk Ltd Knife Handle
EP1798112A3 (fr) * 2005-12-15 2007-09-12 Peugeot Citroën Automobiles S.A. Procédé de moulage par injection plastique d'une pièce de garnissage, et pièce de garnissage issue de ce procédé
USD571955S1 (en) 2007-03-07 2008-06-24 American Safety Razor Shaving razor
EP2886266A1 (fr) * 2013-12-23 2015-06-24 Arcos Hermanos, S.A. Structure améliorée de manches de couteaux avec support d'identification visuelle

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