DE102004009406A1 - Plastic crate molding tool has two types of tool plates, at least one of which has cavity sections facing two adjacent outer faces of the core - Google Patents

Abstract

A core on the moving tool platen forms a molding cavity with tool plates(14,16,18,20) on the nozzle side tool plate. At last one of the tool plates has a flat recess for holding a film insert to be located in a sidewall of the molded crate. At least one first type of tool plate(14,16) has cavity-facing sections extending along two adjacent outer surfaces of the core. The first type of tool plate(14,16) has two cavity-facing sections(42,44) extending along the core and lying at 90[deg] to each other. The length of at least one, preferably both, sections is equal to or greater than half the length of the opposing core wall. The four tool plates comprise two of a first type(14,16) and two of a second type(18,20). Each tool plate of a pair forms a mirror image of the other in the sections adjacent to the molding cavity. Both tool plates (18,20) of the second type have equal length sections(46,48) facing the molding cavity. In the injection position all tool plates are arranged in a holding plate(38) which, in plan view, has a rectangular shape with a first central axis(90). In plan view the core has a rectangular shape with a second central axis(92). Both central axes intersect at an angle(beta ) to each other where beta is neither 0[deg] nor 90[deg], but preferably 30-60[deg], and in particular 45[deg]. Each tool plate is guided towards or away from the core by two or more guide pillars(22,24,26,28). Straight lines parallel to the outer sides of the holding plate intersect the guide pillars. In the injection position all tool plates engage each other and are off center relative to the holding plate sides. Movements of the tool plates are coupled by additional pillars perpendicular to the guide pillars.

Description

The The invention relates to a tool for the manufacture of a Plastic existing container like box with a bottom and side walls outgoing from it comprising a mold cavity bounding core and the core surrounding and closed tool (spray position) at least partially spaced to the core the mold cavity on the outside delimiting mold jaws, wherein preferably at least a first Formbacke a recording like flat Deepening for an insert such as foil for insertion into a side wall of the container having.

A tool for injection molding of boxes is from the DE 199 32 515 A1 known. The tool comprises a fixed nozzle part and a movable core having a closing part. Base jaws originate from the nozzle part, to which axially adjustable and to the core laterally spaced mold jaws are formed. Contact lines between the mold jaws run in the box corner areas themselves.

Especially with bottle and beer crates it wanted that at least one or more side walls on the outside have an imprint which is inserted through in the mold jaws Foils is formed. For this purpose, the corresponding limit the side walls Form-jaw shots like flat Recesses on, in the before spraying in the appropriate Transparencies are inserted. It will be a separate for each side wall Film needed, which are possibly brought up to the box corners can.

Of the The present invention is based on the problem of a tool of the type mentioned in the beginning so that there is the possibility on adjacent side walls of the container to put together a common use how to apply foil.

to solution of the problem, the invention essentially provides that at least a first form jaw in sections along two together bordering outer surfaces of the Kerns extends. In particular, the first mold jaw the recording for the Use on.

deviant of prior art tools according to the invention at least one mold block in such a way trained that these are - and to a considerable extent - along two adjoining outer surfaces of the Kerns extends, so as a result with a single use as a single film adjacent outer surfaces of the container stocked can be. This results in particular optical advantages, since the use in the corner does not complete. It is also advantageous that a frequently be found in the corner Solve the Foil is avoided.

Of course it is the at least first mold jaw detached from an insert inventive.

In Further development of the invention is provided that the first mold jaw has two along the core extending portions, the an angle α with preferably α = 90 °, where at least one of the sections has a longitudinal extension, the equal to or greater than half length the assigned outer surface of the Kerns is. Thus, you can long sections of adjacent side walls with a Insert be provided as a foil. It should in particular both sections of the first forming jaw equal or greater than half length the respectively associated outer surface of the To be core.

Especially It is envisaged that the tool will have four mold jaws with two first ones and two second mold jaws and that the two first and the two second mold jaws with respect to their defining the mold cavity Section mirror symmetry to each other. In this case, preferably the second mold jaw with respect to their respective mold cavity limit two sections equal planar extensions.

Around regardless of the course of the corners of the container such as boxes enclosing mold jaws a compact tool available too put, it is suggested that the mold jaws in injection position are arranged in sections in a catch, in plan view on the circumference a first rectangular geometry with the first central axis has the core in plan view a second rectangular geometry having the second central axis and that the first and second Central axis in plan view at an angle β with β ≠ 0 °, ≠ 90 ° and preferably 30 ° ≤ β ≤ 60 °, in particular β approximately Cut 45 °.

Further Details, advantages and features of the invention do not arise only from the claims, the characteristics to be taken for them - alone and / or in combination - but also from the following description of one of the drawings taking preferred embodiment.

It demonstrate:

1 a nozzle part of an injection molding tool in plan view,

2 a section along the line AA in 1 .

3 a section along the line BB in 1 .

4 a perspective view of the nozzle part according to 1 and

5 a perspective view of a forming jaw of the tool according to the 1 to 4 ,

In the figures is a nozzle part 10 of an injection molding tool shown purely in principle to, without thereby limiting the invention, a box 12 to inject. The nozzle part 10 is assigned in the usual way a closing part from which a core emanates. When the tool is closed, the core defines on the inside a mold cavity, the outside of mold jaws 14 . 16 . 18 . 20 is limited. The mold cavity gives the dimensions and geometry of the box 12 in front.

Usually, the closing part is movable and the nozzle part 10 formed fixed, without this should be a limitation of the invention.

The mold baking 14 . 16 . 18 . 20 are adjustable along guide columns, some of which are exemplified by the reference numerals 22 . 24 . 26 . 28 Marked are. Further, the cheeks 14 . 16 . 18 . 20 with each other via miter columns 30 . 32 . 34 . 36 connected. This results in the advantage that not every form of jaw 14 . 16 . 18 . 20 z. B. must be hydraulically adjusted, but that non-driven jaws on the miter columns 30 . 32 . 34 . 36 get picked up.

The guide columns 22 . 24 . 26 . 28 extend to a catch formed by a block-shaped body 38 clamped plane inclined so that the mold jaws 14 . 16 . 18 . 20 are arranged in the injection position immediately adjacent to the core for limiting the mold cavity and spaced with the tool open to a sufficient extent to this around the box 12 to be able to remove from the mold. Moving the mold jaws 14 . 16 . 18 . 20 takes place synchronously. However, to the operation of the movement or structure and geometry of the mold jaws 14 . 16 . 18 . 20 to illustrate are in the 1 and 4 the mold jaws 16 . 18 in the spray position and the mold jaws 14 . 20 drawn in position with the tool open.

The catch 38 has a cuboid geometry along its sides 39 . 41 . 43 . 45 the guiding columns 22 . 24 . 26 . 28 run. Here are each mold jaw 14 . 16 . 18 . 20 assigned to two guide columns, which in turn are interspersed by degrees, which are parallel to the sides 39 . 41 . 43 . 45 run.

So that the shape of baking 14 . 16 . 18 . 20 can not be pressed apart during spraying, these extend in sections in a corresponding recess 40 of the catch 38 , In that regard, however, reference is made to well-known constructions without the need for further explanation.

Notwithstanding previously known tools, the mold jaws extend 14 . 16 . 18 . 20 not each along only a single surface of the core, but each extending with a first and second section 42 . 44 respectively. 46 . 48 that are in the form of baking 14 . 20 are marked, along adjacent, ie, merging into each other outer surfaces of the core, so that the mold cavity in the region of the respective box corners 50 . 52 . 54 . 56 each of two walls of the core and a single mold jaw 14 respectively. 16 respectively. 18 respectively. 20 is limited.

The first and second sections 42 . 44 respectively. 46 . 48 the form of baking 16 . 20 run in the embodiment accordingly at a right angle. Furthermore, diametrically opposed jaws are in the embodiment 14 . 16 respectively. 18 . 20 formed mirror-symmetrically to the core. Also illustrates the graphic representation that the first and second sections 42 . 44 the first mold baking 14 . 16 have a longitudinal extent greater than half the length of the respective outer surface of the associated core and thus of the box 12 is. The remaining second mold jaws 18 . 20 have the same length trained sections 46 . 48 on, the remaining surface portions of the core are assigned and thus have a length which is less than half the length of the respective outer surface of the core.

To a mutual interlocking of the mold jaws 14 . 16 . 18 . 20 Thus, to allow a positive engagement in the spray position, so as to compensate to a sufficient extent, the forces occurring when spraying the plastic, have the form jaws in Ausfüh tion 14 . 16 perpendicular from the sections 42 . 44 outgoing and thus perpendicular to the facing surface of the core extending outer or edge portions 58 . 60 on. From the outer edge sections 58 . 60 go middle parallel to the displacement of the jaws 14 . 16 extending boundary surfaces 62 . 64 each defining a step, the outside one vertically to the central boundary surface 62 . 64 extending inner section 66 . 68 having.

In the closed position, the inner section extends 66 . 68 along outer surface 70 . 72 the adjacent mold baking 18 . 20 , At the same time there are sections 74 . 76 . 78 . 80 the form of baking 18 . 20 flat on the sections 58 . 62 respectively. 60 . 64 the form of baking 14 . 16 at.

By a corresponding geometry training success, a gearing of the mold jaws 14 . 16 . 18 . 20 in injection position with each other. As mentioned above, the outer section runs 58 . 60 perpendicular to the associated boundary surface of the core. The sections 58 . 62 respectively. 60 . 64 include an obtuse angle, whereas the sections 62 . 66 respectively. 64 . 68 perpendicular to each other.

As in particular from the 4 and 5 it can be seen have the inner surfaces facing the core 82 . 84 the form of baking 14 . 16 . 18 . 20 extensive depressions 86 . 88 on, in the foil-like inserts are inserted, which after spraying on the outer surface of the box 12 be liable. Due to the teachings of the invention, there is the possibility that the corresponding films over the box corners 50 . 52 . 54 . 56 across, like the geometry of the photographs 86 . 88 is apparent.

Of course, not only films can be applied by the teaching of the invention, but injection molded parts can me other inserts are provided, which is due to the formation of the mold jaws 14 . 16 . 18 . 20 extend beyond the box corners.

To enable a compact unit, the mold jaws 14 . 16 . 18 . 20 and thus the core aligned with each other such that central axis 92 of the core to the central axis 90 of the catch 38 at an angle β with β preferably 45 °, as in principle the 1 can be seen.

The central axis 92 of the core and thus the central axis of the box 12 consequently cuts the pages 39 . 41 . 43 . 45 of the catch 38 at the angle β or in parallelepipedal design of the catch 38 opposite edges 94 . 96 ,

Claims (10)

Tool for producing a plastic container such as box ( 12 ) comprising a bottom and outgoing side walls comprising a mold cavity bounding core and the core surrounding and with the mold closed (injection position) at least partially to the core spaced from the mold cavity outside limiting molding jaws ( 14 . 16 . 18 . 20 ), wherein preferably at least one first forming jaw is a receptacle like flat depression ( 86 . 88 ) for an insert such as foil for insertion into a side wall of the container, characterized in that at least one forming jaw ( 14 . 16 ) extends in sections along two adjacent outer surfaces of the core. Tool according to claim 1, characterized in that the first shaping jaw ( 14 . 16 ) two sections extending along the core ( 42 . 44 ), which enclose an angle α with preferably α = 90 °, and that at least one of the sections has a longitudinal extent which is equal to or greater than half the length of the associated outer surface of the core. Tool according to claim 1 or 2, characterized in that both sections ( 42 . 44 ) of the first mold jaw ( 14 . 16 ) is equal to or greater than half the length of each associated outer surface of the core. Tool according to at least one of the preceding claims, characterized in that the tool has four shaping jaws ( 14 . 16 . 18 . 20 ) with two first and two second mold jaws ( 14 . 16 ; 18 . 20 ) and that the two first and the two second mold jaws with respect to their mold cavity bounding portions mirror-symmetrical to each other. Tool according to at least one of the preceding claims, characterized in that the two second shaping jaws ( 18 . 20 ) are equal in size with respect to their respective two sections delimiting the mold cavity. Tool according to at least one of the preceding claims, characterized in that the shaping jaws ( 14 . 16 . 18 . 20 ) in spray position in sections in a catch ( 38 ) are arranged, which in plan view circumferentially a first rectangular geometry with the first central axis ( 90 ) that the core in plan view a second rectangular shape with second central axis ( 92 ) and that the first and the second central axis in plan view at an angle β with β ≠ 0 °, β ≠ 90 ° and preferably 30 ° ≤ β ≤ 60 °, in particular β intersect at approximately 45 °. Tool after at least one of the before going claims, characterized in that each mold jaw ( 14 . 16 . 18 . 20 ) of at least two guide columns ( 22 . 24 . 26 . 28 ) are moved for adjustment in the direction of the core or away from the core and that the at least two guide columns are cut by a straight line which is parallel or approximately parallel to an outer side ( 39 . 42 . 43 . 45 ) of the catch ( 38 ) runs. Tool according to at least one of the preceding claims, characterized in that the shaping jaws ( 14 . 16 . 18 . 20 ) interlock positively in the injection position. Tool according to at least one of the preceding claims, characterized in that the shaping jaws ( 14 . 16 . 18 . 20 ) in relation to the pages ( 39 . 41 . 43 . 45 ) of the catch ( 38 ) are arranged eccentrically to this. Tool according to at least one of the preceding claims, characterized in that the shaping jaws ( 14 . 16 . 18 . 20 ) over perpendicular to the guide columns ( 22 . 24 . 26 . 28 ) miter columns ( 30 . 32 . 34 . 36 ) are positively coupled in their movement.