FR2709440A3 - Process for the production of plastic buckets and bucket obtained by the implementation of said process - Google Patents

Process for the production of plastic buckets and bucket obtained by the implementation of said process Download PDF

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Publication number
FR2709440A3
FR2709440A3 FR9410594A FR9410594A FR2709440A3 FR 2709440 A3 FR2709440 A3 FR 2709440A3 FR 9410594 A FR9410594 A FR 9410594A FR 9410594 A FR9410594 A FR 9410594A FR 2709440 A3 FR2709440 A3 FR 2709440A3
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FR
France
Prior art keywords
shovel
dies
molding
punch
plastic material
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
FR9410594A
Other languages
French (fr)
Other versions
FR2709440B3 (en
Inventor
Zen Michele
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.)
Esseplast SpA
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Esseplast SpA
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Filing date
Publication date
Application filed by Esseplast SpA filed Critical Esseplast SpA
Publication of FR2709440A3 publication Critical patent/FR2709440A3/en
Application granted granted Critical
Publication of FR2709440B3 publication Critical patent/FR2709440B3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/50Auxiliary implements
    • A47L13/52Dust pans; Crumb trays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16Making multilayered or multicoloured articles
    • B29C45/1635Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16Making multilayered or multicoloured articles
    • B29C45/1676Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Toys (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Table Equipment (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The trough-shaped body (1) of the bucket and its flexible front rim (2) are produced from a single piece by successively injecting two different materials into the mould, the movable ram (punch) (6) being in the meantime moved between the two dies (4 and 5).

Description

La présente invention a pour objet un procédé pour la réalisation de pelles en matière plastique, particulièrement adaptées pour le ramassage de produits en vrac. L'invention vise également les pelles obtenues par mise en oeuvre de ce procédé. The present invention relates to a method for producing plastic shovels, particularly suitable for picking up bulk products. The invention also relates to the shovels obtained by implementing this method.

On connaît à l'heure actuelle des pelles en matière plastique spécialement destinées au ramassage de produits en vrac, tout particulièrement de déchets, qui comprennent un corps en forme d'auge pourvu d'une poignée, ladite auge se terminant par un bord rectiligne qui fait fonction de rebord de ramassage. En vue de faciliter la collecte des déchets, en permettant au rebord de mieux adhérer au sol ou autre surface d'appui, on fait comporter à la pelle un profilé en une matière flexible. Currently known plastic shovels specially intended for picking up bulk products, especially waste, which include a trough-shaped body provided with a handle, said trough ending in a straight edge which acts as a collection ledge. In order to facilitate the collection of waste, by allowing the rim to adhere better to the ground or other bearing surface, the shovel is made to have a profile made of a flexible material.

Cette solution présente toutefois l'inconvénient d'aboutir à un article constitué par deux pièces, ce qui complique évidemment la fabrication du fait qu'on doit avoir recours à une opération de moulage pour obtenir l'auge de la pelle et à une opération d'extrusion pour la réalisation du profilé précité, ces deux pièces devant en outre être ensuite assemblées l'une à l'autre. This solution, however, has the drawback of leading to an article consisting of two parts, which obviously complicates the manufacture of the fact that one must have recourse to a molding operation to obtain the trough of the shovel and to an operation of 'extrusion for the production of the aforementioned profile, these two parts must also be then assembled to each other.

Par ailleurs, le rebord antérieur flexible, constitué par un profilé en polychlorure de vinyle extrudé, tend à l'usage à se détacher du corps de la pelle en rendant celle-ci inutilisable. Furthermore, the flexible front flange, formed by an extruded polyvinyl chloride profile, tends to detach from the body of the shovel, making it unusable.

Grâce à l'invention, on obtient une pelle monobloc équipee d'un rebord antérieur flexible, et ce moyennant une seule opération de moulage. Thanks to the invention, a one-piece shovel is obtained equipped with a flexible front edge, and this by means of a single molding operation.

A cet effet, on a recours au processus connu dans l'industrie du moulage des matières plastiques sous le nom de "moulage à deux constituants et à canaux séparés". Ce processus consiste en deux opérations de moulage qui sont effectuées à l'aide d'une même presse d'injection et qui se déroulent en commençant par le moulage du corps en forme d'auge en une matière plastique rigide, puis, après avoir déplacé un poinçon mobile dans le moule, en injectant la seconde matière, par exemple du caoutchouc synthétique, qui est profilée pour former le rebord et qui, après plastification, vient constituer une pièce unique avec le corps de la pelle. For this purpose, use is made of the process known in the plastic molding industry under the name of "two-component molding with separate channels". This process consists of two molding operations which are carried out using the same injection press and which take place by first molding the trough-shaped body into a rigid plastic material, then, after having moved a movable punch in the mold, by injecting the second material, for example synthetic rubber, which is profiled to form the rim and which, after plasticization, comes to constitute a single piece with the body of the shovel.

A la fin de l'opération de moulage, on obtient un corps monobloc formé par deux matières différentes. At the end of the molding operation, there is obtained a one-piece body formed by two different materials.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :
Fig. 1 est une vue en perspective par dessus montrant une pelle suivant l'invention.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
Fig. 1 is a perspective view from above showing a shovel according to the invention.

Fig. 2 est la vue en perspective par dessous. Fig. 2 is the perspective view from below.

Fig. 3 est une coupe longitudinale de la pelle. Fig. 3 is a longitudinal section of the shovel.

Fig. 4 représente à échelle agrandie le bord libre de la pelle. Fig. 4 shows on an enlarged scale the free edge of the shovel.

Fig. 5 à 7 illustrent le processus pour l'obtention, à l'aide de deux injections consécutives, de la pelle pourvue de son rebord flexible. Fig. 5 to 7 illustrate the process for obtaining, using two consecutive injections, the shovel provided with its flexible rim.

Comme on peut le voir en fig. 1 à 4, la pelle représentée, de forme en soi connue, est constituée par un corps 1 en forme d'auge dont le bord antérieur libre est muni d'un rebord flexible 2. As can be seen in fig. 1 to 4, the shovel shown, of known shape, is constituted by a body 1 in the shape of a trough, the free front edge of which is provided with a flexible rim 2.

L'invention vise principalement le procédé de moulage qui, à la manière illustrée en fig. 5 à 7, fait appel à un moule comprenant deux matrices fixes 4 et 5 opposées l'une à l'autre et associées à un poin çon mobile 6. The invention relates mainly to the molding process which, as illustrated in FIG. 5 to 7, uses a mold comprising two fixed dies 4 and 5 opposite one another and associated with a movable punch 6.

Lorsque le poinçon mobile 6 se trouve à la position la plus avancée entre les matrices 4 et 5 illustrée en fig. 6, on obtient, par injection d'une première matière plastique, rigide à la température ambiante, le corps 1 en forme d'auge de la pelle. Le poinçon 6 est ensuite reculé à la manière illustrée en fig. 7 afin de définir une cavité dont le remplissage est opéré par injection d'une seconde matière plastique, flexible à la température ambiante, constituée par exemple par un caoutchouc synthetique, ce qui permet d'obtenir ainsi le rebord ou profilé 2 qui se plastifie sur le bord 3 de la pelle. When the movable punch 6 is in the most advanced position between the dies 4 and 5 illustrated in fig. 6, the body 1 in the form of a scoop trough is obtained by injection of a first plastic material, rigid at room temperature. The punch 6 is then moved back in the manner illustrated in FIG. 7 in order to define a cavity, the filling of which is effected by injection of a second plastic material, flexible at room temperature, constituted for example by synthetic rubber, which thus makes it possible to obtain the rim or profile 2 which is plasticized on the edge 3 of the shovel.

De cette manière, on réalise, par mise en oeuvre d'un procédé très simple, une pelle dont le rebord flexible 2 est fermement rendu solidaire du bord terminal 3 de l'auge. In this way, a shovel is made by implementing a very simple method, the flexible rim 2 of which is firmly made integral with the terminal edge 3 of the trough.

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.  It should moreover be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (3)

REVENDICATIONS 1. Procédé pour la réalisation d'une pelle en matière plastique comprenant un corps (1) en forme d'auge qui est pourvu d'une poignée et qui se termine par un bord antérieur rectiligne (2) en une matière flexible propre à former rebord de ramassage, caractérisé par les phases opératoires ci-après : 1. Method for producing a plastic shovel comprising a body (1) in the shape of a trough which is provided with a handle and which terminates in a rectilinear front edge (2) in a flexible material capable of forming collecting edge, characterized by the following operating phases: - moulage de l'auge (1) de la pelle à l'aide d'un moule comprenant deux matrices fixes opposées (4 et 5) entre lesquelles est prévu un poinçon mobile (6) qui est amené à sa position la plus avancée dans l'empreinte de moulage, ce moulage étant obtenu, dans l'espace compris entre les deux matrices (4, 5) et le poinçon, par injection d'une première matière plastique qui, à la température ambiante, se présente sous forme rigide ; - molding of the trough (1) of the shovel using a mold comprising two opposite fixed dies (4 and 5) between which is provided a movable punch (6) which is brought to its most advanced position in the molding imprint, this molding being obtained, in the space between the two dies (4, 5) and the punch, by injection of a first plastic material which, at ambient temperature, is in rigid form; - déplacement du poinçon (6) de façon à definir un plus grand espace libre entre les deux matrices du moule ; - displacement of the punch (6) so as to define a greater free space between the two mold dies; - et injection d'une seconde matière plastique, flexible à la température ambiante, dans l'espace défini entre les deux matrices, le poinçon mobile et le corps (1) déjà obtenu avec la première matière plastique, en vue de former le rebord antérieur (2). - And injection of a second plastic material, flexible at room temperature, in the space defined between the two dies, the movable punch and the body (1) already obtained with the first plastic material, in order to form the anterior rim (2). 2. Procédé suivant la revendication 1, caractérisé en ce que la seconde matière plastique est constituée par du caoutchouc synthétique. 2. Method according to claim 1, characterized in that the second plastic material consists of synthetic rubber. 3. Pelle en matière plastique, caractérisée en ce qu'elle est realisée par mise en oeuvre du procédé suivant l'une quelconque des revendications 1 et 2.  3. Plastic shovel, characterized in that it is produced by implementing the method according to any one of claims 1 and 2.
FR9410594A 1993-09-02 1994-08-30 Method for producing plastic shovels and shovel obtained by implementing said method. Expired - Lifetime FR2709440B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI930141A IT1270807B (en) 1993-09-02 1993-09-02 PROCEDURE FOR MAKING A PLASTIC SHOVEL AND A SHOVEL OBTAINED BY THE ABOVE-MENTIONED

Publications (2)

Publication Number Publication Date
FR2709440A3 true FR2709440A3 (en) 1995-03-10
FR2709440B3 FR2709440B3 (en) 1995-08-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9410594A Expired - Lifetime FR2709440B3 (en) 1993-09-02 1994-08-30 Method for producing plastic shovels and shovel obtained by implementing said method.

Country Status (4)

Country Link
DE (1) DE4428626A1 (en)
FR (1) FR2709440B3 (en)
GB (1) GB2281531B (en)
IT (1) IT1270807B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7171719B1 (en) * 2004-07-27 2007-02-06 David Harrelson Disposal apparatus

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19518143C1 (en) * 1995-05-17 1996-10-31 Krauss Maffei Ag Method and device for producing thin-walled laminated molded parts
WO1997012732A1 (en) * 1995-10-05 1997-04-10 Kellogg Brush Manufacturing Co. Utensil handle and method of making same
DE10333898B3 (en) * 2003-07-21 2005-04-21 Sai Automotive Sal Gmbh Process for the production of back-molded parts with different wall thicknesses and sizes
CN106206388B (en) * 2016-07-20 2018-08-28 无锡宏纳科技有限公司 A kind of flukeless chip movable fixture
CN106252270B (en) * 2016-07-20 2018-09-07 无锡宏纳科技有限公司 It is a kind of can automatic Picking chip fixture

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509661A1 (en) * 1981-07-17 1983-01-21 Ouest Cie METHOD AND DEVICE FOR MOLDING COMPOSITE PIECES OF PLASTIC MATERIAL
GB8614857D0 (en) * 1986-06-18 1986-07-23 Amp Great Britain Wire sealing
US6171534B1 (en) * 1992-01-15 2001-01-09 Patrick Arthur Leach Method of making a speaker cone and surround assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7171719B1 (en) * 2004-07-27 2007-02-06 David Harrelson Disposal apparatus

Also Published As

Publication number Publication date
DE4428626A1 (en) 1995-03-09
FR2709440B3 (en) 1995-08-25
ITVI930141A0 (en) 1993-09-02
GB2281531A (en) 1995-03-08
GB9415746D0 (en) 1994-09-28
GB2281531B (en) 1997-08-06
IT1270807B (en) 1997-05-07
ITVI930141A1 (en) 1995-03-02

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