Translation of "Bindenähte" in English

When there are several sprues per mold part, joint lines are unavoidable.

This increases the strength of the joint lines.

With these designs flow and weld lines are unavoidable.

In the second embodiment of the present invention, three flow lines 7 result are drawn in FIG.

The joint lines may also lie on the transition to the partition wall channel.

The abutting areas are surrounded by the polyurethane foam forming the joint lines.

The following important effects can be simulated and evaluated with the aid of extrusion simulations: -Flow fronts -Fill-out -Binding seams and air inclusions

The thermoplastic elastomers can be processed to a precise and even surface without welding line.

This makes it possible to create a high gloss finish without sink marks or flow lines.

Moreover, there are no structural instabilities, since workpieces can be produced without weld lines and porosity.

Of importance in this connection is the fact that at the locations of the binding seams 8 the guide band 3, while having the geometric shape as the remaining regions of the guide band 3, have nevertheless a reduced mechanical strength.

In this fashion the binding seams 8, as desired, are acting as fracture lines for the completed guide band 3, so that the guide band 3 can be separated from the projectile body 1, as soon as the projectile leaves the muzzle of the gun barrel.

If in the described embodiment eight different spot-slit-gates 7, as well as eight binding seams 8, are provided, then this number is only to be considered as exemplary and the number of gates can be adjuted to the prevailing operative conditions.

Due to the filigree design of the grille and consequently the conditions which were difficult for injection molding (thin webs, long flow paths, numerous weld lines), material temperatures of greater than 265° C. were necessary.

Outside the abovementioned range of the composition of the component B, opaque molding materials which have joint lines are usually obtained at processing temperatures above 240° C.

The molding materials disclosed in (1) or (2) and based on PC and ABS have a non-homogeneous distribution of the soft phase, do not possess strong weld lines and in general exhibit a low multiaxial impact strength.

Displays weld lines formed at locations of the part where two (or multiple) melt fronts meet.

This permits sequential filling of the cavity, above all in cases where large parts are being moulded, thus preventing the formation of flow lines or at least shifting the flow lines to those areas of the moulding that are not mechanically and/or optically critical.

Together with RocTool, from Charlotte, NC, KraussMaffei is presenting an application capable of creating a name plate with a curved surface and without any weld lines.

As a result, joint lines or flow lines are avoided during cascade injection molding. These are mistakes that only actually emerge during the subsequent painting and then incur double the costs—especially when large amounts of plastic are used, which is the case with bumpers.

Analysis programmes help us simulate, for example, the mould filling behaviour, the temperature sequence or the joint lines, and thus to trim the plastics qualitatively and economically.

Above: the initial runner configuration produced high molding pressure, partially unfilled regions and weld lines in functional sections of the part.

The pocket-type chain wheel (1) according to claim 1, characterized in that joint lines are predominantly located in a rim (14) which axially delimits at least a part of the pockets (3, 4).

Direct use of the untreated, generally injection-molded plastics parts is aesthetically disadvantageous, because surface defects resulting from the process, such as weld lines, air inclusions, and also necessary reinforcing fillers, such as glass fibers, are clearly discernible here.

In the first embodiment of the invention, two flow lines 7 result and are each in particular circumferentially offset by 90° from the injection openings O 1, O 2, i.e., they are situated, like the two injection openings O 1, O 2, diametrically opposite to one another.

This way, a homogeneous temperature distribution in the polymeric mass PM and also the above described symmetrical configuration of the weld lines 7 is ensured to the greatest possible extent.

Also eliminated are weld lines in injection-molded plastic panels. Entry of liquids and dirt is prevented, thus eliminating the need for further design measures for discharging the liquids.

However, it may be positioned in the edge areas between two adjacent partition wall channels, so that the joint lines are positioned at the edge (edge area) of the chamber outer wall of the magazine.

It is particularly advantageous if this solution according to the invention is applied to forming joint lines since, as a result, the joint line strength transversely relative to the flow line direction can be increased and hence the regions which are critical for the total strength of the component can be significantly increased.

In contrast to the state of the art, the present invention consequently seeks the solution for equalisation of the orientation of fillers and/or distribution of the fillers in that the underlying problem, the anisotropy of the filler, is tackled, not in a less disadvantageous arrangement of the furthermore weak flow joints or in a special design of injection of the moulding compound.