DE3801173A1 - Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique - Google Patents

Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique

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Publication number
DE3801173A1
DE3801173A1 DE19883801173 DE3801173A DE3801173A1 DE 3801173 A1 DE3801173 A1 DE 3801173A1 DE 19883801173 DE19883801173 DE 19883801173 DE 3801173 A DE3801173 A DE 3801173A DE 3801173 A1 DE3801173 A1 DE 3801173A1
Authority
DE
Germany
Prior art keywords
head parts
injection
brush heads
arrangement
temperature control
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.)
Withdrawn
Application number
DE19883801173
Other languages
German (de)
Inventor
Heinrich Schaiper
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19883801173 priority Critical patent/DE3801173A1/en
Publication of DE3801173A1 publication Critical patent/DE3801173A1/en
Withdrawn legal-status Critical Current

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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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7343—Heating or cooling of the mould heating or cooling different mould parts at different temperatures
    • 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
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Landscapes

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

Abstract

The invention relates to a process and arrangement for producing toothbrush mouldings with divided brush heads or functional surfaces by the injection-moulding technique. When injection moulding thermoplastics, depending on the plastication temperature, considerable values of thermal contraction have to be accepted. By means of a controllable temperature control according to Fig. 1, these contractions are directed in such a way that an internal bracing of the brush heads (12) and (13) against each other results. The temperature control in or at the parting wall (17) is thus different to the temperature control in or at the outer injection mould (2). The inner bracing of the head parts (12) and (13) eliminates the gap (16) caused by production between the head parts (12) and (13) towards the open end, the head parts contact each other under pressure and a spreading apart of the head parts during the cleaning function is prevented. A flexible movement of the head parts is possible only in the direction of the bristles, while there is lateral stability. <IMAGE>

Description

Die Erfindung betrifft die Spritzgußtechnik bei Zahnbürsten­ formkörpern mit geteilten Bürstenköpfen.The invention relates to the injection molding technique for toothbrushes molded bodies with split brush heads.

Die Spritzgußtechnik bei ungeteilten Zahnbürstenformkörpern ist bekannt und allgemein in Gebrauch.The injection molding technique for undivided toothbrush moldings is known and in common use.

Dieses bekannte Verfahren ist jedoch unzureichend in bezug auf die Fertigung von Zahnbürstenspritzgußkörpern mit ge­ teilten Bürstenköpfen, weil der bisher angewandte gleich­ mäßige Temperaturführung bei der Kühlung der Formen und damit der Zahnbürstenformkörper, Verspannungen in den Form­ körpern selbst verhinderte.However, this known method is insufficient on the production of toothbrush injection moldings with ge shared brush heads because the one previously used is the same moderate temperature control when cooling the molds and thus the shaped toothbrush body, tension in the form body itself prevented.

(Vergleiche Fig. 1) Bei der Spritzgußfertigung von Zahnbürsten­ formkörpern mit geteilten Funktionsflächen wie z. B. den Kopfteilen (12) und (13) würde bei gleichmäßiger Temperatur­ führung im Bereich der geteilten Bürstköpfe (14) nach dem Ausbetten aus der Form (2) ein Spalt (16) im erkalteten Formkörper verbleiben, der zuvor in der Spritzgußform durch die Trennwand (17) eingenommen wurde. Dieser Spalt führt in der Putzfunktion zum Aufsperren der Kopfteile und be­ hindert so die Bürstenfunktion im Munde und an den Zähnen.(Compare Fig. 1) In the injection molding of toothbrush moldings with divided functional surfaces such. B. the head parts ( 12 ) and ( 13 ) would lead at a uniform temperature in the area of the divided brush heads ( 14 ) after devesting from the mold ( 2 ), a gap ( 16 ) in the cooled mold, which previously in the injection mold by Partition ( 17 ) was taken. This gap leads to the opening of the head parts in the cleaning function and thus prevents the brush function in the mouth and on the teeth.

Der Erfindung liegt also die Aufgabe zugrunde, diesen produktionstechnisch bedingten Spalt (16) am offenen Ende zu schließen; d. h. im Ergebnis, daß die Kopfteile (12) und (13) sich unter innerer Verspannung zum offenen Ende hin berühren.The invention is therefore based on the object of closing this gap ( 16 ) caused by production technology at the open end; ie as a result that the head parts ( 12 ) and ( 13 ) touch under inner tension towards the open end.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Temperaturführung im Bereich der Teilung (14) und den Kopf­ teilen (12) und (13) different gestaltet wird, um so eine nach dem Erkalten des Formkörpers verbleibende innere Ver­ spannung der Kopfteile (12) und (13) herbeizuführen.According to the invention, this object is achieved in that the temperature control in the region of the division ( 14 ) and the head share ( 12 ) and ( 13 ) is designed differently, so as to keep an internal tension of the head parts ( 12 ) after the mold has cooled ( 13 ) to bring about.

Das zum Beispiel forcierte Abkühlen der inneren Trennwandung (17) bei Temperaturdifferenz zur äußeren Form (2) führt zur verbleibenden inneren Verspannung der Kopfteile (12) und (13).For example, the forced cooling of the inner partition wall ( 17 ) with a temperature difference to the outer shape ( 2 ) leads to the remaining inner tensioning of the head parts ( 12 ) and ( 13 ).

Die innere Verspannung der Kopfteile ist eine unbedingte Voraussetzung für die flexible Funktion von geteilten Bürsten­ köpfen bei gegebener Seitenstabilität. Das Aufsperren der Kopfteile während des Putzvorganges wird so verhindert und eine die Funktion begründende flexible Bewegung der Kopf­ teile (12) und (13) ist nunmehr nur in Borstenrichtung möglich.The internal bracing of the head parts is an absolute prerequisite for the flexible function of split brush heads with given lateral stability. Unlocking the head parts during the cleaning process is prevented and a flexible movement of the head parts ( 12 ) and ( 13 ) which is the basis of the function is now only possible in the bristle direction.

Fig. 1 zeigt in Aufsicht eine Spritzgußform (2) mit dem Gußkanal (19) und dem Zahnbürstenformkörper (16) mit ge­ teiltem Bürstenkopf, bestehend aus den Kopfteilen (12) und (13) mit zwischenliegendem Spalt (16). Im Spalt (16) liegt die Trennwandung (17), verbunden mit der Gußform (2). Bei (11) und (11 a) ist mögliches Isolationsmaterial ange­ ordnet, das eine deutlich getrennte Temperaturführung im Be­ reich der Form (2) und im Bereich der Trennwandung (17) ermöglicht. Weitere Wärmeisolatoren wie z. B. (18) und (18 a) können in den seitlichen Wandungen der Form (2) angeordnet sein. Eine weitere Ausführungsform sieht vor, daß das Material der äußeren Form (2) eine differente Wärmeleitfähigkeit durch Materialauswahl und -stärke, zum Material der Trenn­ wandung (7) besitzt und daß Isolationsflächen fehlen. Weiter ist in einer anderen Ausführung die Kühlung der Form (2) und der Trennwandung (17) durch Kühlmittel unter­ schiedlicher Wärmeaufnahmefähigkeit vorgesehen. Fig. 1 shows a top view of an injection mold ( 2 ) with the casting channel ( 19 ) and the toothbrush molded body ( 16 ) with a divided brush head consisting of the head parts ( 12 ) and ( 13 ) with an intermediate gap ( 16 ). In the gap ( 16 ) is the partition ( 17 ), connected to the mold ( 2 ). In ( 11 ) and ( 11 a) possible insulation material is arranged, which allows a clearly separate temperature control in the area of the form ( 2 ) and in the region of the partition ( 17 ). Other heat insulators such. B. ( 18 ) and ( 18 a) can be arranged in the side walls of the mold ( 2 ). Another embodiment provides that the material of the outer shape ( 2 ) has a different thermal conductivity through material selection and thickness, to the material of the partition wall ( 7 ) and that insulation surfaces are missing. Furthermore, in another embodiment, the cooling of the mold ( 2 ) and the partition ( 17 ) by means of coolants with different heat absorption capabilities is provided.

Claims (6)

1. Verfahren und Anordnung zur Spritzgußfertigung von Zahnbürsten mit geteilten Bürstenköpfen, dadurch ge­ kennzeichnet, daß die Wandung der äußeren Form (2) und die Trennwandung (17) mit Temperaturdifferenz gekühlt werden.1. The method and arrangement for the injection molding of toothbrushes with divided brush heads, characterized in that the wall of the outer shape ( 2 ) and the partition ( 17 ) are cooled with a temperature difference. 2. Verfahren und Anordnung nach Anspruch 1, dadurch ge­ kennzeichnet, daß die Wandung der äußeren Form (2) und die Trennwandung (17) aus Materialien unterschiedlicher Wärmeleitfähigkeit bestehen.2. The method and arrangement according to claim 1, characterized in that the wall of the outer shape ( 2 ) and the partition ( 17 ) consist of materials of different thermal conductivity. 3. Verfahren und Anordnung nach Anspruch 1. und 2., da­ durch gekennzeichnet, daß zwischen der Wandung der äu­ ßeren Form (2) und der Trennwandung (17) eine oder mehrere Temperaturisolationen (11) und (11 a) angeordnet sind.3. The method and arrangement according to claim 1 and 2, characterized in that one or more temperature insulation ( 11 ) and ( 11 a) are arranged between the wall of the outer shape ( 2 ) and the partition ( 17 ). 4. Verfahren und Anordnung nach den Ansprüchen 1. bis 3., dadurch gekennzeichnet, daß in der Wandung der äußeren Form (2) eine oder mehrere Temperaturisolationen (18) und (18 a) angeordnet sind.4. The method and arrangement according to claims 1 to 3, characterized in that one or more temperature insulation ( 18 ) and ( 18 a) are arranged in the wall of the outer shape ( 2 ). 5. Verfahren und Anordnung nach den Ansprüchen 1. bis 4., dadurch gekennzeichnet, daß die Wandung der äußeren Form (2) und die Trennwandung (17) mit Kühlmitteln unterschiedlicher Wärmeaufnahmefähigkeit gekühlt werden.5. The method and arrangement according to claims 1 to 4, characterized in that the wall of the outer shape ( 2 ) and the partition ( 17 ) are cooled with coolants of different heat absorption capacity. 6. Verfahren und Anordnung nach den Ansprüchen 1. und 5., dadurch gekennzeichnet, daß die variable Temperatur­ führung Anwendung findet, geteilte Funktionsflächen wie z. B. die Ringform mit flexiblem Zentralelement, in den Ebenen gegeneinander durch innere Verspannung zu versetzen.6. The method and arrangement according to claims 1. and 5., characterized in that the variable temperature leadership is used, divided functional areas such as B. the ring shape with flexible central element, in the levels against each other through inner tension to move.
DE19883801173 1988-01-18 1988-01-18 Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique Withdrawn DE3801173A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883801173 DE3801173A1 (en) 1988-01-18 1988-01-18 Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883801173 DE3801173A1 (en) 1988-01-18 1988-01-18 Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique

Publications (1)

Publication Number Publication Date
DE3801173A1 true DE3801173A1 (en) 1989-07-27

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ID=6345428

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883801173 Withdrawn DE3801173A1 (en) 1988-01-18 1988-01-18 Process and arrangement for producing toothbrush mouldings with divided brush heads by the injection-moulding technique

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8200228U1 (en) * 1982-01-07 1982-07-01 Blankschein, Werner, 8000 München INJECTION MOLD FOR BRUSH AND BRUSH PARTS
DE3237444A1 (en) * 1981-03-19 1983-05-05 Aktiebolaget Bäckmans Mekaniska Verkstad, 73100 Köping SPRING ELEMENT AND A METHOD AND DEVICE FOR ITS PRODUCTION

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237444A1 (en) * 1981-03-19 1983-05-05 Aktiebolaget Bäckmans Mekaniska Verkstad, 73100 Köping SPRING ELEMENT AND A METHOD AND DEVICE FOR ITS PRODUCTION
DE8200228U1 (en) * 1982-01-07 1982-07-01 Blankschein, Werner, 8000 München INJECTION MOLD FOR BRUSH AND BRUSH PARTS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DD-Z: Plaste und Kautschuk, H.6, 1978, S.352-354 *

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