DE2521122C3 - Device for pressing soft plastic blanks with a pressing piston which can be moved in a horizontal direction to a vertical pressing out direction - Google Patents
Device for pressing soft plastic blanks with a pressing piston which can be moved in a horizontal direction to a vertical pressing out directionInfo
- Publication number
- DE2521122C3 DE2521122C3 DE19752521122 DE2521122A DE2521122C3 DE 2521122 C3 DE2521122 C3 DE 2521122C3 DE 19752521122 DE19752521122 DE 19752521122 DE 2521122 A DE2521122 A DE 2521122A DE 2521122 C3 DE2521122 C3 DE 2521122C3
- Authority
- DE
- Germany
- Prior art keywords
- pressing
- soft plastic
- moved
- vertical
- horizontal direction
- 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
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
-
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruches 1. Beim Verpressen von weichplastischen Kunststoff-Rohlingen mit einem in waagerechter Richtung zu einer senkrechten Auspreßrichtung bewegbaren Preßkolben muß der weichplastische Kunststoff zum Hineindrücken in den Formhohlraum um 90° umgelenkt werden. Hierbei müssen — weil der weichplastische Kunststoff sich nicht hydraulisch verhält — in der waagerechten Richtung mit dem Preßkolben sehr große Preßkräfte ausgeübt werden, damit der Werkstoff in die senkrechte Richtung ausweicht und außerdem noch in dem Formhohlraum unter Druck gesetzt wird.The invention relates to a device according to the preamble of claim 1. When pressing soft plastic blanks with one in a horizontal direction to a perpendicular extrusion direction movable plunger, the soft plastic must be pressed into the mold cavity be deflected by 90 °. Here - because the soft plastic is not hydraulic behaves - very large pressing forces are exerted in the horizontal direction with the plunger, so that the material gives way in the vertical direction and also in the mold cavity is pressurized.
Aufgabe der Erfindung ist es, eine Vorrichtung zum Verpressen von weichplastischen Kunststoff-Rohlingen mit einem in waagerechter Richtung zu einer senkrechten Auspreßrichtung bewegbaren Preßkolben so zu gestalten, daß ein günstiger Materialtluß zum Formhohlraum mit einer verhältnismäßig kleinen Preßkraft erzielbar ist.The object of the invention is to provide a device for pressing soft plastic blanks of plastic with a plunger that can be moved in a horizontal direction to a vertical extrusion direction shape that a favorable flow of material to the mold cavity can be achieved with a relatively small pressing force.
Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Stirnfläche des Preßkolbens und eine ihr gegenüberliegende Fläche eines Formteils in einem von der senkrechten Richtung erheblich abweichenden Winkel gegen den Formhohlraum zeigen. Nunmehr hat die Preßkraft eine nach dem Formhohlraum gerichtete Komponente. Auf diese Weise sind für das Umlenken des Werkstoffes von der waagerechten in die senkrechte Fließrichtung und für ein kraftvolles Hineindrücken des Werkstoffes in den Formhohlraum günstige Bedingungen geschaffen. Hinzu kommt noch, daß in dem weicbplastischen Material bei seiner Verdrängung in Richtung Form Querkräfte auftreten, die sich strukturverbessernd auswirken.This object is achieved according to the invention in that the end face of the plunger and one of her opposite surface of a molded part in a direction that deviates significantly from the vertical direction Point the angle against the mold cavity. The pressing force now has a direction towards the mold cavity Component. In this way you are able to divert the material from the horizontal to the vertical Flow direction and favorable for forceful pressing of the material into the mold cavity Conditions created. In addition there is the fact that in the plastic material when it is displaced Shear forces occur in the direction of the shape, which have a structure-improving effect.
Der Neigungswinkel der Ablenkflächen soll vorzugsweise zwischen 30° und 60° liegen. Als optimal wird ein Neigungswinkel von 45° angesehen.The angle of inclination of the deflecting surfaces should preferably be between 30 ° and 60 °. As optimal becomes a Viewed angle of inclination of 45 °.
Die Erfindung wird nachstehend an Hand der Zeichnung erläutert Diese zeigt inThe invention is explained below with reference to the drawing
F i g. 1 einen die Achse des Preßkolbens enthaltenden Senkrechtschnitt durch die Preßvorrichtung und eine Preßform, inF i g. 1 a vertical section containing the axis of the plunger through the pressing device and a Mold, in
F i g. 2 eine Ansicht aus der Linie ΙΙ-ίί der Fi g. 1 und inF i g. 2 is a view from the line ΙΙ-ίί of Fi g. 1 and in
F i g. 3 eine Ansicht aus der Linie 111-111 der Fig. 1.F i g. 3 is a view taken along line 111-111 of FIG. 1.
Der den Prsßkolben 1 in waagerechter Richtung führende Körper 2 hat an seiner Oberseite eine Einbringöffnung 3 für den zu verpressenden weichplastischen Kunststoff-Rohling. An die offene Stirnseite des Kolben-Führungskörpers 2 ist ein Formteil 4 angelegt. Zwei weitere Formteile 5 und 6 sind oben auf den Führungskörper 2 und den Formteil 4 aufgesetzt und bilden den mit 7 bezeichneten Formhohlraum.The press piston 1 in the horizontal direction leading body 2 has an insertion opening 3 on its upper side for the soft plastic to be pressed Plastic blank. A molded part 4 is attached to the open end face of the piston guide body 2 created. Two further molded parts 5 and 6 are placed on top of the guide body 2 and the molded part 4 and form the mold cavity denoted by 7.
Der Preßkolben 1 hat eine abgeschrägte Stirnfläche 9, die gegen den Formhohlraum 7 zeigt Der geneigten Kolbenstirnfläche 9 liegt eine ebenfalls gegen den Formhohlraum 7 zeigende Fläche 10 des Formteils 4 gegenüber, die vorzugsweise von der Teilebene 11 zwischen dem Führungskörper 2 und dem Formteil 4 ausgeht. In der gleichen Ebene 11 stoßen beim Beispiel auch die beiden Formteile 5 und 6 zusammen.The plunger 1 has a beveled end face 9 which points towards the mold cavity 7 of the inclined Piston end face 9 is a surface 10 of molded part 4 that likewise points towards mold cavity 7 opposite, which is preferably from the partial plane 11 between the guide body 2 and the molded part 4 goes out. In the example, we encounter in the same level 11 also the two molded parts 5 and 6 together.
Der Neigungswinkel, unter dem die Schrägflächen 9 und 10 zur Senkrechten verlaufen, beträgt beim Ausführungsbeispiel etwa 45°. Hierbei hat die auf den Kolben 1 auszuübende Preßkraft eine gleich große, nach dem Formhohlraum gerichtete Komponente.The angle of inclination at which the inclined surfaces 9 and 10 extend to the vertical is at Embodiment about 45 °. Here, the compressive force to be exerted on the piston 1 is of the same magnitude component directed towards the mold cavity.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752521122 DE2521122C3 (en) | 1975-05-13 | 1975-05-13 | Device for pressing soft plastic blanks with a pressing piston which can be moved in a horizontal direction to a vertical pressing out direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752521122 DE2521122C3 (en) | 1975-05-13 | 1975-05-13 | Device for pressing soft plastic blanks with a pressing piston which can be moved in a horizontal direction to a vertical pressing out direction |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2521122A1 DE2521122A1 (en) | 1976-11-25 |
| DE2521122B2 DE2521122B2 (en) | 1977-10-27 |
| DE2521122C3 true DE2521122C3 (en) | 1978-06-15 |
Family
ID=5946367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19752521122 Expired DE2521122C3 (en) | 1975-05-13 | 1975-05-13 | Device for pressing soft plastic blanks with a pressing piston which can be moved in a horizontal direction to a vertical pressing out direction |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2521122C3 (en) |
-
1975
- 1975-05-13 DE DE19752521122 patent/DE2521122C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2521122B2 (en) | 1977-10-27 |
| DE2521122A1 (en) | 1976-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8320 | Willingness to grant licences declared (paragraph 23) | ||
| 8339 | Ceased/non-payment of the annual fee |