FR2489209A1 - Spiked brush with handle moulded around perforated insert - to eliminate spike assembly from handle moulding cycle - Google Patents

Spiked brush with handle moulded around perforated insert - to eliminate spike assembly from handle moulding cycle Download PDF

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Publication number
FR2489209A1
FR2489209A1 FR8018885A FR8018885A FR2489209A1 FR 2489209 A1 FR2489209 A1 FR 2489209A1 FR 8018885 A FR8018885 A FR 8018885A FR 8018885 A FR8018885 A FR 8018885A FR 2489209 A1 FR2489209 A1 FR 2489209A1
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Prior art keywords
points
plate
insert
handle
mold
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Granted
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FR8018885A
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French (fr)
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FR2489209B1 (en
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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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14385—Coating a portion of a bundle of inserts, e.g. making brushes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/16—Implements for after-treatment of plaster or the like before it has hardened or dried, e.g. smoothing-tools, profile trowels
    • E04F21/161—Trowels

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

Abstract

Spiked brushes are made by using a prefabricated insert (6) to locate a set of spikes (P) within a mould for producing an injection moulded handle (A). The insert has a grid profile to allow the moulding material to more readily flood the cavity and envelope the insert. The passages through parts of the insert for accepting the spikes are a tight fit for the spikes, to exclude the moulding material, pref. pass through individual bosses in the grid. Loading of the insert with a set of spikes can be independent of the injection moulding tool, to minimise the injection moulding cycle. The insert material can be selected for e.g. high strength and low mass, the subsequent moulding material for appearance and feel.

Description

L'invention concerne un procédé de fabrication. par moulage notamment dans des machines ou presses â injecter, d'uns taloche à pointes. The invention relates to a manufacturing method. by molding in particular in machines or presses for injection, of a trowel with points.

Entrent corollairement dans le cadre de l'invention, les moyens de mise en oeuvre et les taloches obtenues. As a corollary to the invention, the means of implementation and the floats obtained.

L'objet de ltinvention se rattache ai secteur technique du bâtiment no tamment des instruxents de maçons et autre matériel accessoire pour le bfttiment et leur emploi. The object of the invention relates to the technical sector of the building, in particular masons' instruments and other accessory material for the building and their use.

On connait les taloches z pointes qui servent a' donner aux enduits extérieurs et/ou intérieurs projetés mcaniquement et avant que la solidification soit achevée, un aspect irrégulier du type torchis. We know the floats z points which are used to give the exterior and / or interior plasters projected mechanically and before solidification is completed, an irregular appearance of the cob type.

Généralement ces taloches à pointes sont obtenues par moulage dans des pros- ses ou autres machines d'injection de la matière plastique. Il s'avère nécessaire de placer préalablement les pointes dans une partie approprie du moule. L'on conçoit que cela constitue une opération longue et fastidieuse par le nombre relativement important de pointes & positionner (60 à200 pointes par exemple). Generally, these floats with spikes are obtained by molding in prostheses or other plastic injection machines. It proves necessary to place the points beforehand in an appropriate part of the mold. It is understandable that this constitutes a long and tedious operation by the relatively large number of tips & position (60 to 200 tips for example).

Il en résulte également que le rendement des machines (presses) est tr & sensiblement abaissé car les dites machines ne fonctionnent pas selon leur iode optimum qui tend vers un régime continu pour avoir toujours de la matière plas- tique dans un état pateux liquide convenable. It also results therefrom that the efficiency of the machines (presses) is very considerably lowered because the said machines do not operate according to their optimum iodine which tends towards a continuous regime in order to always have plastic material in a suitable liquid pasty state.

Pour remédier à ces inconvénients, d'une manière particulièrement simple, rapide et conomique, selon l'invention, on prépositionne les pointes, manuel- lement ou mécaniquement, sur une plaque support destinée a être introduite di.  To overcome these drawbacks, in a particularly simple, rapid and economical manner, according to the invention, the tips are prepositioned, manually or mechanically, on a support plate intended to be inserted di.

rectement équipée des pointes, dans la partie appropriée du ioule. properly equipped with spikes, in the appropriate part of the ioule.

Ces caractéristiques et d'autres encore ressortiront de la suite de la des- cription. These and other characteristics will become apparent from the following description.

Four fixer l'objet de l'invention, sans toutefois le limiter, dans les dessine anmexés
- la figure 1 est une vue en perspective d'une taloche avec pointes selon l'invention.Oven fix the object of the invention, without however limiting it, in the anmexes drawings
- Figure 1 is a perspective view of a trowel with tips according to the invention.

- la figure 2 est une vue en plan d'un exemple de réalisation nullement limitatif de la plaque support conforte pour le prépositionnement des pointes. - Figure 2 is a plan view of an exemplary embodiment without limitation of the support plate comfort for the prepositioning of the tips.

- la figure 3 est une vue partielle en coupe et & grande échelle, considérée selon la ligne 3 1 3 de la figure 1, les pointes n'étant pas positionnées. - Figure 3 is a partial sectional view & & large scale, considered along the line 3 1 3 of Figure 1, the tips are not positioned.

- la figure 4 est une vue semblable à la figure 3 montrant le positionnement des peintes. - Figure 4 is a view similar to Figure 3 showing the positioning of the painted.

- les figures 5 et 6 illustrent par des vues en coupe à caractère purement schématique le procédé de réalisation selon l'invention, de la taloche a pointes. - Figures 5 and 6 illustrate by sectional views of a purely schematic nature the method of production according to the invention, the tip float.

- la figure 7 est une vue en coupe montrant la taloche a pointes exécutée selon le procédé des figures 5 et 6. FIG. 7 is a sectional view showing the spike float executed according to the method of FIGS. 5 and 6.

Afin de rendre plus concret ltobjet de invention, on le décrit maintenant d'une manière non limitative en se répérant aux exemples de réalisation des figures des dessins. In order to make the object of the invention more concrete, it is now described in a non-limiting manner with reference to the exemplary embodiments of the figures of the drawings.

On voit figure 1 notamment, une taloche à pointes qui d'une manière par~ faftement connue pour l'hoome de l'Art, comprend essentiellement un corps  généralement de forme parallélépipédique, avec a sa base et en débordement, une pluralité de pointes P dont les extrémités pointues Fl sont susceptibles d'strie mises en contact avec le matériau a travailler. Le corps A de la taloche est équipé d'une poignée de préhension B de tout type connu et approprié. We see in particular Figure 1, a trowel with spikes which in a way ~ faftement known for the art home, essentially comprises a body  generally of parallelepiped shape, with at its base and overflow, a plurality of spikes P whose pointed ends F1 are likely to be brought into contact with the material to be worked. The body A of the trowel is equipped with a grip handle B of any known and appropriate type.

Cénéralement ces taloches, en matière plastique sont obtenues directement par moulage, au moyen de machines ou de presses & ije à action verticale ou horizontale. On a illustré d'une manière purement schématique et a titre indicatif nullement limitatif, aux figures 5 et 6, une partie d'une presse à lnjecfer avec essentiellement, un bgti fixe 1 recevant le moule ou matrice 2 de formes, sections et dimensions correspondant à celles désirées pour le corps de la taloche notamment.Un poinçon 3 coopérant avec la matrice ç est monté dans un coulisseau mobile 4 équipé en outre d'une buse d'injection 41 de la matière plastique dans un état pâteux-liquide.Dans le fond du moule 2 est rap portée une pièce 5 sous forme de bloc parallélépipèdique percé verticalement, de part en part, d'une pluralité de trous 51 pour le logement et positiormement des pointes P de la taloche0 Selon la technique antérieure connue, il s'avérait 'Lcessaire de positionner manuellement et séparément obscure des pointes P dans les trous 51 de la pièce 5, en interrompant, par voie de conséquence, pendant un temps relativement long, le cycle de fonctionnement de la machins, avant de pouvoir à nouveau injecter la matière plastique pour la formation de la taloche à pointes. Generally, these plastic floats are obtained directly by molding, using machines or presses with vertical or horizontal action. There has been illustrated in a purely schematic manner and by way of non-limiting indication, in FIGS. 5 and 6, part of a lnjecfer press with essentially, a fixed bgti 1 receiving the mold or die 2 of corresponding shapes, sections and dimensions to those desired for the body of the float in particular. A punch 3 cooperating with the die ç is mounted in a movable slide 4 further equipped with an injection nozzle 41 of the plastic in a pasty-liquid state. bottom of the mold 2 is rap carried a part 5 in the form of a rectangular block pierced vertically, through and through, with a plurality of holes 51 for housing and positiorement of the points P of the trowel According to the known prior art, there is It would be necessary to position manually and separately obscure the points P in the holes 51 of part 5, by interrupting, consequently, for a relatively long time, the cycle of operation of the machines, before p again inject the plastic material for the formation of the spike float.

Selon l'invention, les pointes P sont prôpositionnées sur une plaque suppert 6 destinée à être introduite dans le moule 2. Les pointes sont prépositionnées soit manuellement, soit mécaniquement au moyen de tous appareils et machines appropriés telles que les machines à clouer. According to the invention, the points P are prepositioned on a suppert plate 6 intended to be introduced into the mold 2. The points are prepositioned either manually or mechanically by means of any suitable apparatus and machines such as nail machines.

La plaque ou carte support 6, est munie d'une pluralité de perforations 61 autorisant l'engagement des pointes P. De plus, d'une manière importante, cette plaque 61qui est destinée A rester dans le moule pendant l'opération d'injection, est convenablement ajourée en 62 pour permettre le passage et l'écoulement de la matière plastique. The plate or support card 6, is provided with a plurality of perforations 61 allowing the engagement of the points P. In addition, in a significant way, this plate 61 which is intended to remain in the mold during the injection operation , is suitably perforated at 62 to allow the passage and the flow of the plastic.

Après différentes études et essais, il ressort d'une manière préférée, quoi- que non limitative, que la forme, telle qu'illustrée à la figure 2, est parti- culièrement bien adaptée On voit que la plaque 6 constitue un treillis délimitant ainsi un nombre important d'ouvertures 62. Les trous 61 de passage et de positionnement des pointes P sont formés sensiblement au droit de l'entrecroi- servent 63 de chaque élément 64 constituant le treillis.  After various studies and tests, it emerges in a preferred manner, although not limiting, that the shape, as illustrated in FIG. 2, is particularly well suited. It can be seen that the plate 6 constitutes a trellis thus delimiting a large number of openings 62. The holes 61 for passage and positioning of the points P are formed substantially in line with the criss-cross 63 of each element 64 constituting the trellis.

Suivant une autre caractéristique, un bossage circulaire 65 est formé concentriquement â chaque trou de passage 61 en étant destiné à prendre appui dans le fond du ioule 2 notamment sur le bloc perforé 5 (figure 3)0
Comme le montre la figure 4, le diamètre des trous de passage 61 de la plaque 6 est très sensiblement inférieur ou égal au diamètre extérieur du corps des pointes P de sorte que ces dernières sont emmanchées légèrement à force pour entre susceptibles d' occuper un positionnement vertical convenable@@ facilitant l'introduction de 11 ensemble de la plaque et des pointes dans le moule 2.Par exemple la partie d'extrémité pointue pl des pointes déborde de quelques millimètres seulement par rapport à la face inférieure d'appui de la plaque support 6.According to another characteristic, a circular boss 65 is formed concentrically with each through hole 61 while being intended to bear on the bottom of the ioule 2 in particular on the perforated block 5 (FIG. 3) 0
As shown in FIG. 4, the diameter of the through holes 61 of the plate 6 is very substantially less than or equal to the outside diameter of the body of the tips P so that the latter are fitted slightly by force so as to be able to occupy a positioning suitable vertical @@ facilitating the introduction of 11 assembly of the plate and the points into the mold 2. For example the pointed end part pl of the points protrudes by only a few millimeters relative to the underside of the support of the plate support 6.

Le prépositionnement des pointes P sur la plaque support ajourée 6 permet un gain de temps et une facilité d'exécution de la taloche t pointes. The prepositioning of the tips P on the perforated support plate 6 saves time and makes it easier to execute the trowel t tips.

En effet, il suffit de positionner la plaque 6 équipée des pointes P dans le fond du moule de manière å ce que chaque partie d'extrémité PI des pointes coopère avec les trous 51 du bloc 5 logé dans le fond du moule (figure 5) ; cette opération étant quasiment in6diate. On ferme ensuite d'une manière connue le coulisseau 4 ; le poinçon 3 coopère avec la matrice 2 en finissant d' enfoncer l'ensemble des pointes P dans la plaque 6 et concomitaiment dans le bloc 5 (figure 6).On injecte, notamment par la buse sl la matière plastique qui enrobe parfaitement la plaque 6 en passant par les ouvertures 62 peur constituer le corps de la taloche avec en débordement, après démoulage, les pointes P (figure 7). Indeed, it suffices to position the plate 6 equipped with the points P in the bottom of the mold so that each end portion PI of the points cooperates with the holes 51 of the block 5 housed in the bottom of the mold (FIG. 5) ; this operation being almost immediate. The slide 4 is then closed in a known manner; the punch 3 cooperates with the die 2 by finishing pushing all of the points P into the plate 6 and concomitantly in the block 5 (Figure 6). We inject, in particular by the nozzle sl the plastic which perfectly coats the plate 6 passing through the openings 62 can constitute the body of the trowel with overflow, after demoulding, the points P (Figure 7).

Il est bien évident que la plaque support ajourée 6, peut Entre réalisée dans différentes matières et exécutée selon divers procédés. Toutefois, d'un manière préférée, la plaque 6 est obtenue par moulage d'une matière plastique dont les caractéristiques moléculaires notamment, sont les mêmes que celles du corps de la taloche pour Entre auto-soudées lors de l'injection de la matière plastique assurant la formation de ladite taloche. It is obvious that the perforated support plate 6 can be made of different materials and executed according to various methods. However, in a preferred manner, the plate 6 is obtained by molding a plastic material whose molecular characteristics in particular, are the same as those of the body of the float for self-welded during the injection of the plastic material. ensuring the formation of said float.

De iSme, selon les dimensionnements des taloches, il peut s'avérer néces- saire de disposer dans le moule une ou plusieurs plaques porte-pointes 6, qui dans ce cas peuvent présenter un ou des bords agences ou équipés pour coopérer avec les bords adjacents des autres plaques support. On peut prévoir également d'introduire mécaniquement la plaque prééquipée des pointes dans le moule. From iSme, depending on the dimensions of the floats, it may be necessary to have one or more tip-holder plates 6 in the mold, which in this case may have one or more agency edges or equipped to cooperate with the adjacent edges. other support plates. Provision may also be made to mechanically introduce the plate pre-equipped with the points into the mold.

Les avantages ressortent bien de la description, en particulier on souligne 1
- la facilité et rapidité de mise en oeuvre des pointes dans la machine de moulage la rendant inopérante pendant un laps de temps minimum, accélérant et améliorant par conséquence la production et le cott. The advantages emerge clearly from the description, in particular it underlines 1
- The ease and speed of implementation of the tips in the molding machine making it inoperative for a minimum period of time, accelerating and consequently improving production and cost.

L'invention ne se limite aucunement à celui de ses modes d'application non plus qu'a ceux des modes de réalisation de ses diverses parties ayant été plus spécialement indiquées ; elle en embrasse au contraire toutes les variantes.  The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts having been more particularly indicated; on the contrary, it embraces all its variants.

Claims (7)

- REVENDICATIONS I- CLAIMS I -1- Procédé de fabrication par moulage notamment dans des machines ou presses à injecter d'une taloche a pointes, les moyens de mise en eeuvre et les produits résultant, ledit procédé étant caractérisé en ce que l'on pré- positionne sur une plaque support (6) les pointes (P), on introduit dans la presse, notamment dans le fond d'un moule (2), ladite plaque (6) préalable- ment équipée des pointes (P) dont les parties d'extrémité pointues (P1) coc- pèrent avec un bloc perforé (5) logé dans le fond Cu moule, on ferme ja presse, on injecte ensuite d'une manière connue une matière plastique dans un état convenable pour l'obtention, après démoulage du corps (A) de la taloche avec en débordement les pointes (F.  -1- Manufacturing process by molding in particular in machines or presses for injecting a spike float, the means of implementation and the resulting products, said process being characterized in that it is pre-positioned on a plate support (6) the points (P), said plate (6) is previously introduced into the press, in particular in the bottom of a mold (2), equipped with the points (P), the pointed end portions of which ( P1) co-operate with a perforated block (5) housed in the bottom Cu mold, close the press, then inject in a known manner a plastic material in a state suitable for obtaining, after demolding of the body (A ) of the trowel with the tips overflowing (F. -2- moyens de mise en oeuvre selon la revendication 1, caractérisés en ce que la plaque support (6) est munie d'une mluralité de perforations (61) au t risant 11 engagement et le positionnement vertical en hauteur des pointes (P) la dite plaque étant convenablement ajourée en (62) pour permettre le passage et l'écoulement de la matière plastique lors de son injection. -2- means of implementation according to claim 1, characterized in that the support plate (6) is provided with a plurality of perforations (61) at t risant 11 engagement and vertical positioning in height of the tips (P) said plate being suitably perforated at (62) to allow the passage and the flow of the plastic during its injection. -3- Noyons de mise en oeuvre selon les revendications 1 et 2 ensemble, caractérisé en ce que la plaque < 6) constitue un treillis pour délimiter un nombre important d'ouvertures (62), les trous de passage et de positionnement (61) des pointes p étant fertés sensiblement au droit de l'entrecroisement (63) de chaque élément (64) constituant le treillis. -3- Core implementation according to claims 1 and 2 together, characterized in that the plate <6) constitutes a trellis to delimit a large number of openings (62), the through and positioning holes (61) points p being substantially fertilized at the intersection (63) of each element (64) constituting the trellis. -4- Noyons de mise en oeuvre selon l'une quelconque des revendications 1, 2 et 3 caractérisés en ce que le diamètre des trous de passage (61) des pointes (P) est très sensiblement inférieur ou égal au diamètre extérieur du corps des pointes (P), de sorte que ces dernières sont emmanchées â force pour être JUS ceptibles d'occuper un positionnement vertical convenable facilitant l'introduction de l'ensemble de la plaque (6) et des pointes (P) dans le ioule (2).  -4- Core implementation according to any one of claims 1, 2 and 3 characterized in that the diameter of the through holes (61) of the points (P) is very substantially less than or equal to the outer diameter of the body of the points (P), so that the latter are force-fitted to be JUS ceptibles to occupy a suitable vertical positioning facilitating the introduction of the assembly of the plate (6) and points (P) in the ioule (2 ). -5- Noyens de mise en oeuvre selon l'une quelconque des revendications lg 2, 3 et 4 caractérisés en ce qu'un bossage circulaire (65) est formé concentriquement à chaque trou (61) en étant destiné à prendre appui dans le fond du moule (2). -5- Implementation means according to any one of claims lg 2, 3 and 4 characterized in that a circular boss (65) is formed concentrically with each hole (61) being intended to bear against the bottom of the mold (2). 6- Moyens de mise en oeuvre selon l'une quelconque des revendications 1, a, 3, 4 et 5, caractérisés en ce que la plaque support (6) est en matière plastique dont les caractéristiques moléculaires notamment sont équivalentes a celles de la matière plastique destinée à former le corps de la taloche. 6- means of implementation according to any one of claims 1, a, 3, 4 and 5, characterized in that the support plate (6) is made of plastic material whose molecular characteristics in particular are equivalent to those of the material plastic intended to form the body of the float. -7- Taloche à pointes résultant de l'une quelconque des revendications 1 à 6.  -7- Taloche à pointes resulting from any one of Claims 1 to 6.
FR8018885A 1980-08-27 1980-08-27 PROCESS FOR MANUFACTURING BY MOLDING, PARTICULARLY IN MACHINES OR PRESSES FOR INJECTING A POINT TALOCHE, THE MEANS OF PROCESSING AND THE TALOCHES OBTAINED Expired FR2489209B1 (en)

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FR8018885A FR2489209B1 (en) 1980-08-27 1980-08-27 PROCESS FOR MANUFACTURING BY MOLDING, PARTICULARLY IN MACHINES OR PRESSES FOR INJECTING A POINT TALOCHE, THE MEANS OF PROCESSING AND THE TALOCHES OBTAINED

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FR8018885A FR2489209B1 (en) 1980-08-27 1980-08-27 PROCESS FOR MANUFACTURING BY MOLDING, PARTICULARLY IN MACHINES OR PRESSES FOR INJECTING A POINT TALOCHE, THE MEANS OF PROCESSING AND THE TALOCHES OBTAINED

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FR2489209B1 FR2489209B1 (en) 1985-09-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127780A2 (en) * 1983-05-03 1984-12-12 Lifetime Tool Company, Inc. An improved implement and method of manufacture thereof
US4915895A (en) * 1987-11-30 1990-04-10 General Motors Corporation Method for making a composite tread for track-laying vehicles
US5141353A (en) * 1983-05-03 1992-08-25 Lifetime Tool Company, Incorporated Implement having a thermoplastic handle molded over an intermediate portion of a working head
BE1008696A3 (en) * 1993-02-02 1996-07-02 Zahoransky Anton Fa Method of manufacturing and brushes brush making machine.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR981311A (en) * 1948-12-28 1951-05-24 Brushes improvements
FR1133844A (en) * 1955-04-08 1957-04-02 Brosse & J Dupont Reunis Manufacturing process of plastic brushes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR981311A (en) * 1948-12-28 1951-05-24 Brushes improvements
FR1133844A (en) * 1955-04-08 1957-04-02 Brosse & J Dupont Reunis Manufacturing process of plastic brushes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0127780A2 (en) * 1983-05-03 1984-12-12 Lifetime Tool Company, Inc. An improved implement and method of manufacture thereof
EP0127780A3 (en) * 1983-05-03 1986-02-05 Last Time Tool Company, Inc. An improved implement and method of manufacture thereof
US5141353A (en) * 1983-05-03 1992-08-25 Lifetime Tool Company, Incorporated Implement having a thermoplastic handle molded over an intermediate portion of a working head
US4915895A (en) * 1987-11-30 1990-04-10 General Motors Corporation Method for making a composite tread for track-laying vehicles
BE1008696A3 (en) * 1993-02-02 1996-07-02 Zahoransky Anton Fa Method of manufacturing and brushes brush making machine.

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FR2489209B1 (en) 1985-09-13

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