DE2321873A1 - Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts - Google Patents

Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts

Info

Publication number
DE2321873A1
DE2321873A1 DE19732321873 DE2321873A DE2321873A1 DE 2321873 A1 DE2321873 A1 DE 2321873A1 DE 19732321873 DE19732321873 DE 19732321873 DE 2321873 A DE2321873 A DE 2321873A DE 2321873 A1 DE2321873 A1 DE 2321873A1
Authority
DE
Germany
Prior art keywords
deep
vacuum
separation
parts
material thickness
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.)
Pending
Application number
DE19732321873
Other languages
German (de)
Inventor
Wolfgang Oelkers
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 DE19732321873 priority Critical patent/DE2321873A1/en
Publication of DE2321873A1 publication Critical patent/DE2321873A1/en
Pending legal-status Critical Current

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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/32—Moulds having cutting means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Pref., the material is still under vacuum, and the cut is not complete; it is first completed in the cooling period, when the vacuum is removed. For complicated vacuum and blown parts (curves or corners), parting may be effected by subsequent kneeing. Specif., the deep-drawn parts ate shaped during the first stage of processing, so that after-treatment, e.g. removal of edge projections, and parting of simultaneously drawn parts, is facilitated.

Description

Vorrichtung zum Trennen (während der Herstellung) tiefgezogener thermoplastischer Teile Zur Zeit werden tiefgezogene Teile, besonders starkwandige und große Teile, nachträglich getrennt beschnitten.Device for separating (during production) thermoformed thermoplastics Parts At the moment, deep-drawn parts, particularly thick-walled and large parts, subsequently trimmed separately.

Dies bedeutet eine erhebliche Mehraufwendung, eventuelle Zwischenlagerung und erhöhte Ausschußgefahr bei der Nachbearbeitung.This means a considerable additional expense, possible interim storage and increased risk of rejects in post-processing.

Der Erfindung liegt deshalb die Aufgabe zu Grunde eine Lösung zu finden, wobei die tiefgezogenen Teile während des ersten Vorganges der Verarbeitung so zu formen, daß eine Nachbearbeitung, wie z. B. die Entfernung von Randüberständen, das Trennen mehrerer gleichzeitig gezogener Teile zu vereinfachen.The invention is therefore based on the task of finding a solution wherein the deep-drawn parts during the first process of processing so too shape that a post-processing, such. B. the removal of overhangs, to simplify the separation of several parts drawn at the same time.

Dies geschieht im folgenden dadurch, daß im Oberstempel ein der Form angepaßtes Trennmesser befestigt ist. Schon in der Endphase des Tiefziehens oder Blasens fährt der Oberstempel herunter und drückt das noch weiche Material bis auf ca. 1/2 mm verbleibende Wandstärke herunter, bzw.This is done in the following in that a form in the upper punch adapted cutting knife is attached. Already in the final phase of deep drawing or When blowing, the upper punch moves down and presses the still soft material open approx. 1/2 mm remaining wall thickness down or

trennt. Durch einen Endschalter wird nach einer kurzen Zeit des Ankühlens der volle Druck auf den Oberstempel gegeben, so daß der Stempel nach dem Abschalten des Vakuums voll herunterfährt, Oberstände undloder die einzelnen Teile trennt.separates. A limit switch is used to cool down after a short period of time the full pressure is given on the upper punch, so that the punch after switching off the vacuum shuts down completely, supernatants and / or the individual parts are separated.

o Ein weiterer Vorteil dieses Verfahrens ist, daß die getrennten Teile keine scharfen Kanten aufweisen, sondern bei der Vortrennung eine leichte Wölbung entsteht, so daß die einzelnen Teile hinterher gerundete Kanten aufweisen können. o Another advantage of this method is that the separate Parts do not have any sharp edges, but rather a slight one when they are pre-separated Curvature arises so that the individual parts have rounded edges afterwards can.

Claims (3)

Ansprüche:Expectations: Messer oder Schneidwerkzeuge zur Befestigung im Oberstempel, die so ausgebildet sind, daß sie je nach Materialstärke eine glatte Trennung bewirken. Knife or cutting tools for fastening in the upper punch, the are designed so that they cause a smooth separation depending on the material thickness. 2.) Anspruch in Verbindung mit 1 die zeitliche Einstellung des Schneidvorganges. Da das Material noch unter Vakuum steht, darf der Schneidvorgang nicht zu einer völligen Trennung fUhren. Erst nach Abschaltung des Vakuums erfolgt in der Kühlzeit'die Trennung.2.) Claim in connection with 1 the timing of the cutting process. Since the material is still under vacuum, the cutting process must not lead to a lead to complete separation. Only after switching off the vacuum does the cooling time take place Separation. 3.) Trennung nach Anspruch 1 und 2 auch komplizierter Vakuum- und Blasteile (Rundungen, Ecken usw.)zumindest so weit, daß ein nachträgliches Knicken zur Trennung führt.3.) Separation according to claim 1 and 2 also more complicated vacuum and Blown parts (curves, corners, etc.) at least so far that subsequent kinking leads to separation.
DE19732321873 1973-04-30 1973-04-30 Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts Pending DE2321873A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732321873 DE2321873A1 (en) 1973-04-30 1973-04-30 Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732321873 DE2321873A1 (en) 1973-04-30 1973-04-30 Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts

Publications (1)

Publication Number Publication Date
DE2321873A1 true DE2321873A1 (en) 1974-11-21

Family

ID=5879727

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732321873 Pending DE2321873A1 (en) 1973-04-30 1973-04-30 Upper die cutter or blade - for smooth parting, according to material thickness, of deep-drawn parts

Country Status (1)

Country Link
DE (1) DE2321873A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099306A1 (en) * 1982-06-01 1984-01-25 Seprosy Societe Europeenne Pour La Transformation Des Produits De Synthese Process and apparatus for producing plastics articles interconnected by easily breakable seams by way of thermoforming

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099306A1 (en) * 1982-06-01 1984-01-25 Seprosy Societe Europeenne Pour La Transformation Des Produits De Synthese Process and apparatus for producing plastics articles interconnected by easily breakable seams by way of thermoforming

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