DE102006008405A1 - Deep drawn lid for plastics container, e.g. for foodstuffs, has stable wall region formed by back injection. e.g. of polypropylene - Google Patents

Abstract

The invention relates to a part of a plastic vessel produced by the deep-drawing process, in particular a lid (1) or container part. In order to further improve a plastic part of the type in question, it is proposed that the cover (1) have a wall (9) formed by back injection molding.

Description

The The invention relates to a lid made by thermoforming a plastic vessel.

cover of the type in question are well known, especially in the budgetary area, further example, in the food industry in conjunction with plastic containers, which can also be made by deep drawing.

in the With regard to the known prior art is a technical Problem of the invention seen in it, a lid of the speech standing still improve.

These Problematic is first and substantially solved by the subject-matter of claim 1, wherein it is turned off that the cover one by Hinterspritzen having formed wall. According to this embodiment is for one increased stability reaches the lid in the back-injected wall. To the Furthermore, such a manufactured lid also proves in terms the handling as advantageous. The first deep-drawn lid is made of a plastic material, which in particular in the chosen one Thickness is such that a certain inherent stability of the deep-drawn part is reached. So this deep-drawn part is much more stable than a shaped label or the like. This is achieved by a material thickness of the deep-drawn part of more than 0.3 mm. This inherent stability of the deep-drawn part is further increased by the back injection, in this respect as Back injection material soft or hard plastics in question come.

The objects the further claims are but explained below with reference to the subject-matter of claim 1 even in their independent Be meaningful.

So proves to be further advantageous that the cover for anchoring formed on the vessel is and that one for this suitable locking lug is produced by plastic injection molding. Thus, for example, the lid can be designed as a snap lid be. It is conceivable in this regard also an embodiment in which the lid as a screw cap is formed, in which case the said locking lug a threaded portion shaped. In a preferred embodiment, the back injection is predominant made in the edge region of the lid, so more preferably in the Area that anchors to the vessel interacts. So overlaps the lid has an associated edge of the vessel due to a U-training its edge region, the overreaching area completely back-injected is. Consequently, the entire anchoring section is preferred the lid, which cooperates with an associated edge portion of the plastic vessel back-injected with a plastic material. alternative can the overreaching area also only with regard to an outer leg of the U-training be injected behind. It is further preferred that the Hinterspritzmaterial provided only inside the deep drawn part is. Alternatively, the back-injection material can also be partially, optionally linear externally be applied to the deep-drawn part, for example, as a result of penetration of the provided with corresponding openings deep-drawn part with the back injection material. This can also be in a further embodiment lead to the formation of a handling edge.

The Thermoforming material and / or the Hinterspritzmaterial is preferably made of polypropylene. Alternatively, the thermoforming material can also off Polystyrene exist.

below the invention with reference to the accompanying drawings, which only three embodiments represents, closer explained. It shows:

1 in a perspective bottom view of a lid according to the invention in a first embodiment;

2 the enlarged section along the line II-II in 1 ;

3 in a perspective plan view of a lid in a second embodiment;

4 the section according to the line IV-IV in 3 ;

5 in a further perspective plan view of a lid in a third embodiment and

6 the section according to the line VI-VI in 5 ,

Illustrated and described first with reference to the 1 and 2 a first embodiment of a deep-drawn lid 1 for a plastic container, which may also be made by deep drawing.

The thermoformed deep-drawn part 2 consists of a polypropylene material. This is in plan essentially elongated rectangular formed with rounded corners. In cross-section, the deep-drawn part forms 2 a circumferential, U-shaped edge area 3 from, for anchoring interaction with the assignable edge region of the plastic vessel.

The outer leg 4 the U-Off education 5 of the edge area 3 has a greater length in cross-section than the inner leg 6 , This inner thigh 6 spans a ceiling surface 7 of the deep-drawn part 2 ,

The down-facing free end of the outer thigh 4 carries an outwardly projecting, circumferential edge 8th ,

The deep-drawn part 2 is relatively thin, but with a certain inherent stability. So a material thickness of about 0.3 mm to 0.6 mm is selected.

According to the in the 1 and 2 In the embodiment shown, the deep-drawn part is circumferential over the entire edge region 3 back-injected inside walls, to form a circumferential wall 9 , The rear injection material 10 covers the entire interior of the U-shape 5 that means covering the inner and outer thighs 4 respectively. 6 as well as the cover-side, the two thighs 4 and 6 connecting subway 11 ,

The rear injection material 10 also goes into the between the inner thighs 6 clamped ceiling 7 of the deep-drawn part 2 , this with a measure starting from the inner thigh 6 which is about half the extension length of the inner leg 6 equivalent.

The essentially free-tensioned, Tiefziehteilseitige blanket 7 is back-injected crosswise, according to which the ceiling 7 supporting bars 12 form. At the crossroads of these bridges 12 the injection point, not shown, is selected.

In the vertical direction over the inner thigh 6 protruding from section of the outer leg 4 is inside of the back injection material 10 a catch 13 formed in the course of the back injection. Specifically, this detent nose forms 13 a circumferential, inwardly facing bead, with a corresponding Gegenwulst the plastic container for fixing the lid 1 interacts.

In the 3 and 4 a second embodiment is shown. Here is just the outer thigh 4 and an adjoining subsection of the U-web 11 back-molded. The corner area between the U-bridge 11 and outer thigh 4 of the deep-drawn part 2 forms a lowered step, at the bottom of which an opening 14 is provided. Through this enters Hinterspritzmaterial 10 to the outside, for the formation of the corner of Hinterspritzmaterial 10 , This may be, for example, a decoration border, which may be made of different shades or materials. Thus, in this regard, a softer material may also be used to create a soft touch.

Next alternatively, according to the representations in the 5 and 6 likewise the outer leg 4 and here the entire U-bridge 11 be injected behind. The inner thigh 6 as well as the ceiling 7 are free of back injection material 10 , In this embodiment, that is in the region of the free end of the outer leg 4 molded edge overmoulded with the Hinterspritzmaterial 10 , so that there is also a Softtouchzone, the handling of the lid 1 in particular for the separation of the same from the plastic vessel simplified.

On the essentially free-tensioned ceiling 7 of the deep-drawn part 2 - If necessary, also beyond the peripheral edge region - a label may be applied.

All disclosed features are (for itself) essential to the invention. In the disclosure of the application will hereby also the disclosure content of the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

Claims (7)

Thermoformed lid ( 1 ) of a plastic container, characterized in that the lid ( 1 ) a wall formed by injection molding ( 9 ) having. Lid according to claim 1 or in particular according thereto, characterized in that the lid ( 1 ) for anchoring to the vessel and that a suitable latching lug ( 13 ) is produced by plastic injection molding. Lid according to one or more of the preceding claims or in particular according thereto, characterized in that the back-injection predominantly in the edge region of the lid ( 1 ) is made. Lid according to one or more of the preceding claims or in particular according thereto, characterized in that the lid ( 1 ) an associated edge of the vessel due to a U-training ( 5 ) of its edge area ( 3 ) and that the overreaching area is completely back-injected. Lid according to one or more of the preceding claims or in particular according thereto, characterized in that the overlap region only with respect to an outer leg ( 4 ) of the U-Off education ( 5 ) is injected behind. Lid according to one or more of the preceding claims or in particular according thereto, characterized in that the thermoforming material and / or the Hinterspritzmaterial ( 10 ) consists of polypropylene. Lid according to one or more of the preceding claims or in particular according thereto, characterized in that the thermoforming material Polystyrene exists.