DE29707400U1 - Device for plasticizing plastics - Google Patents
Device for plasticizing plasticsInfo
- Publication number
- DE29707400U1 DE29707400U1 DE29707400U DE29707400U DE29707400U1 DE 29707400 U1 DE29707400 U1 DE 29707400U1 DE 29707400 U DE29707400 U DE 29707400U DE 29707400 U DE29707400 U DE 29707400U DE 29707400 U1 DE29707400 U1 DE 29707400U1
- Authority
- DE
- Germany
- Prior art keywords
- plasticizing
- screw
- granulate
- plastic material
- small
- 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.)
- Expired - Lifetime
Links
- 229920003023 plastic Polymers 0.000 title claims description 16
- 239000004033 plastic Substances 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims description 8
- 239000008187 granular material Substances 0.000 description 10
- 238000001746 injection moulding Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 244000309464 bull Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Plastifizieren von Kunststoffen, die aufweistThe invention relates to a device for plasticizing plastics, which has
- einen Einfülltrichter fur Kunststoffmaterial und- a filling funnel for plastic material and
- eine Plastifiziereinheit, in die Kunststoffmaterial aus dem Einfülltrichter gelangt.- a plasticizing unit into which plastic material flows from the filling hopper.
Plastifiziervorrichtungen für Kunststoffe, insbesondere für Spritzgießmaschinen, sind hinlänglich bekannt. Meist befindet sich eine Schnecke in einem Schneckenzylinder, die rotatorisch angetrieben wird. Dadurch und ggf. durch äußere Wärmeeinwirkung auf den Schneckenzylinder wird Kunststoffgranulat plastifiziert und in einen Schneckenvorraum gefördert. Dort sammelt sich die Schmelze, bis genügend Material vorhanden ist. Durch eine translatorische Verschiebebewegung der Schnecke wird dann das im Schneckenvorraum vorhandene Kunststoffmaterial in ein Spritzgießwerkzeug eingespritzt.Plasticizing devices for plastics, especially for injection molding machines, are well known. Usually there is a screw in a screw cylinder that is driven in rotation. This and possibly the external effect of heat on the screw cylinder causes plastic granulate to be plasticized and conveyed into a screw antechamber. The melt collects there until there is enough material. The plastic material in the screw antechamber is then injected into an injection molding tool by a translatory displacement movement of the screw.
In jüngerer Zeit ist der Bedarf aufgetreten, Spritzgießformteile mit besonders kleinen Ausmaßen herzustellen. Hier sind mikro-mechanische Bauteile (z. B. Mikrozahnräder für Kleinstpumpen), medizintechnische Kleinteile und optoelektronische Elemente (z. B. Teile für Lichtleiter) als Beispielbauteile zu nennen, bei denen die Herstellung mit klassisschen Spritzgießmaschinen Probleme bereitet. Dies ist dadurch bedingt, daß die üblichen Schnecken- und Schneckenzylinderabmessungen entsprechend klein ausgebildet werden müssen.Recently, the need has arisen to produce injection molded parts with particularly small dimensions. Examples of components that pose problems when manufactured using conventional injection molding machines include micro-mechanical components (e.g. micro gears for small pumps), small medical components and optoelectronic elements (e.g. parts for light guides). This is due to the fact that the usual screw and screw cylinder dimensions have to be made correspondingly small.
Da bei zunehmender Verkleinerung von Schnecke und Schneckenzylinder auch die Schneckengangtiefe ebenfalls immer weiter abnimmt, kann es zu Problemen kommen, wenn übliches Kunststoffgranulat verarbeitet werden soll: die Abmessungen der einzelnen GranulatkörnerSince the screw and screw cylinder are reduced in size, the screw thread depth also continues to decrease, problems can arise when processing conventional plastic granulate: the dimensions of the individual granulate grains
• s ·•s ·
können bereits ein ordnungsgemäßes Aufschmelzen des Granulats unmöglich machen oder zumindest negativ beeinflussen.can make proper melting of the granulate impossible or at least have a negative impact.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der gattungsgemäßen Art zu schaffen, mit der es möglich ist, auch bei sehr klein ausgebildeten Plastifizierelementen, also insbesondere Plastifizierschnecken, die Verwendung konventionellen Granulats möglich zu machen.The present invention is therefore based on the object of creating a device of the generic type with which it is possible to make the use of conventional granulate possible even with very small plasticizing elements, in particular plasticizing screws.
Die Lösung der Aufgabe durch die Erfindung ist gekennzeichnet durch eine zwischen Einfülltrichter (1) und Plastifiziereinheit (2) angeordnete Mühle (3), mit der Kunststoffmaterial gemahlen wird.The solution to the problem by the invention is characterized by a mill (3) arranged between the filling funnel (1) and the plasticizing unit (2) with which plastic material is ground.
In der Zeichnung ist ein Ausfuhrungsbeispiel der Erfindung dargestellt. Die Figur zeigt den schematischen Querschnitt durch eine Plastifiziereinheit einer Spritzgießmaschine.An embodiment of the invention is shown in the drawing. The figure shows a schematic cross section through a plasticizing unit of an injection molding machine.
Konventionelles Granulat wird in einen Einfülltrichter 1 geschüttet. In der Plastifiziereinheit 2 findet das Aufschmelzen des Kunststoffgranulats statt, wobei eine sehr kleine Schnecke mit entsprechend kleiner Schneckengangtiefe zum Einsatz kommt. Damit sollen kleine Mengen Schmelze gut homogenisiert aufgeschmolzen werden, um sie anschließend in ein - nicht dargestelltes Spritzgießwerkzeug einzuspritzen; in diesem sollen sehr kleine Spritzgießformteile gefertigt werden.Conventional granulate is poured into a filling funnel 1. The plastic granulate is melted in the plasticizing unit 2, using a very small screw with a correspondingly small screw thread depth. This is intended to melt small amounts of melt in a well-homogeneous manner in order to then inject them into an injection molding tool (not shown); in this tool, very small injection molded parts are to be manufactured.
Um die Verwendung des konventionellen Granulats möglich zu machen, ist zwischen Trichter 1 und Plastifiziereinheit 2 eine Granulatmühle 3 angeordnet. Diese ist in der Lage, das in den Trichter eingegebene Kunststoffgranulat, das eine gewisse Korngröße aufweist, in kleinere Partikel zu mahlen, bevor diese dann zwecks Aufschmelzung in die Plastifiziereinheit 2 gelangen.In order to make the use of conventional granulate possible, a granulate mill 3 is arranged between the hopper 1 and the plasticizing unit 2. This is able to grind the plastic granulate fed into the hopper, which has a certain grain size, into smaller particles before these then reach the plasticizing unit 2 for melting.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29707400U DE29707400U1 (en) | 1997-04-24 | 1997-04-24 | Device for plasticizing plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29707400U DE29707400U1 (en) | 1997-04-24 | 1997-04-24 | Device for plasticizing plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29707400U1 true DE29707400U1 (en) | 1997-07-10 |
Family
ID=8039473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29707400U Expired - Lifetime DE29707400U1 (en) | 1997-04-24 | 1997-04-24 | Device for plasticizing plastics |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29707400U1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE693979C (en) * | 1936-10-08 | 1940-07-23 | Franz Koenig | Screw extruder for pasta dough |
| US2382655A (en) * | 1943-02-16 | 1945-08-14 | Allied Plastics Co | Auxiliary scrap feed for plastic molding machines |
| DE1800226B2 (en) * | 1968-10-01 | 1973-05-10 | Bruno Meyer, Spezialmaschinen Und Wiegeapparatebau Kg, 5201 Geisbach | PROCESS FOR CONTINUOUS PRODUCTION OF A PROFILE STRAND FROM RUBBER OR PLASTIC BY EXTRUSION PRESSES AND DEVICE FOR PERFORMING THE PROCESS |
| EP0303929A2 (en) * | 1987-08-18 | 1989-02-22 | Indupack Ag | Apparatus for preparing thermoplastic products |
| DE3916407A1 (en) * | 1989-05-19 | 1990-11-22 | Hans Hench | Spinning stretching and injection of thermoplastic melt - has good properties in longitudinal direction achieved by spinning stretching and forming of extruded melt at two different stages |
| DE4429390A1 (en) * | 1994-08-10 | 1996-02-15 | Joachim Dipl Ing Wagenblast | Direct re-working of solid, sheet and foam plastic waste |
| DE19530428C1 (en) * | 1995-08-18 | 1996-12-19 | Albrecht Fritzsche | Granulating mill for plastic scrap |
-
1997
- 1997-04-24 DE DE29707400U patent/DE29707400U1/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE693979C (en) * | 1936-10-08 | 1940-07-23 | Franz Koenig | Screw extruder for pasta dough |
| US2382655A (en) * | 1943-02-16 | 1945-08-14 | Allied Plastics Co | Auxiliary scrap feed for plastic molding machines |
| DE1800226B2 (en) * | 1968-10-01 | 1973-05-10 | Bruno Meyer, Spezialmaschinen Und Wiegeapparatebau Kg, 5201 Geisbach | PROCESS FOR CONTINUOUS PRODUCTION OF A PROFILE STRAND FROM RUBBER OR PLASTIC BY EXTRUSION PRESSES AND DEVICE FOR PERFORMING THE PROCESS |
| EP0303929A2 (en) * | 1987-08-18 | 1989-02-22 | Indupack Ag | Apparatus for preparing thermoplastic products |
| DE3916407A1 (en) * | 1989-05-19 | 1990-11-22 | Hans Hench | Spinning stretching and injection of thermoplastic melt - has good properties in longitudinal direction achieved by spinning stretching and forming of extruded melt at two different stages |
| DE4429390A1 (en) * | 1994-08-10 | 1996-02-15 | Joachim Dipl Ing Wagenblast | Direct re-working of solid, sheet and foam plastic waste |
| DE19530428C1 (en) * | 1995-08-18 | 1996-12-19 | Albrecht Fritzsche | Granulating mill for plastic scrap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19970821 |
|
| R163 | Identified publications notified |
Effective date: 19971017 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20000606 |
|
| R157 | Lapse of ip right after 6 years |
Effective date: 20031031 |