DE2141368B - Dismountable mold - Google Patents

Description

The invention is illustrated below with reference to one in the drawing Embodiment explained in more detail. It shows F i g. 1 a longitudinal section through a closed casting mold sealed according to the invention with round lead in wire form,

2 shows a cross section through the casting mold at the level of the screw connection after a section II-II in Fig. 1, F i g. 3 is a perspective view of a Spacer.

As can be seen from FIGS. 1 and 2, the casting mold consists of two storey half-shells 1,2, mainly in the area of a storey floor 10 and a mouth hole 11 congruently pierced tabs 3, 4 are welded, which are clamped together with brass screws 5 and nuts 6.

To achieve a parting line 7 of a defined width are at the clamping points inserted between the half-shells 1, 2 in FIG. 3 spacers 8 shown provided, which have a web width of, for example, 3.5 mm.

A round or elliptical one is used to seal the parting line 7 Lead wire 9, which has a minimum initial thickness of, for example, 4 mm and when Screwing together the half-shells 1, 2 is compressed to 3.5 mm.

To cast a test piece are in the parting line 7 between the Half-shells 1,2 the lead wire 9 and in the area of the terminal points the distance pieces 8 inserted. The screws 5 are then inserted into the bores of the tabs 3, 4 and the half-shells 1, 2 are clamped together by tightening the nuts 6 until the spacers 8 get stuck.

The lead wire 9 is slightly flattened, whereby it is in the parting line 7 sealingly to the opposing parting surfaces of the half-shells 1.2 snuggles. The mold closed in this way is then used together with the Original bullet sleeves in the casting device, e.g. B.

a casting trolley, set and like the bullet casings with filled with hot liquid explosives and in various warming and cooling stages Cooled to solidification or room temperature.

To cut through the solidified casting charge, the screws are 5.6 solved and the spacers 8 removed. Then the lead wire 9 is pulled out.

In the following sawing process there is a consistently even gap 7 available for the saw, so that only the explosives can be sawed through. To The casting charge can be checked for structure as well as freedom from cracks and voids Explosives melted out again and both this and, above all, the casting mold 1.2 can be reused after appropriate pretreatment.

Claims (4)

Claims: 1. Can be dismantled, primarily from original bullet casings produced, longitudinally divisible casting mold whose half-shells for testing the solidified Explosives filling for structure formation as well as free of voids and cracks underneath put together by sealants, like undivided (original) bullet casings with warm liquid Explosives poured out and after solidification of the explosives and loosening of the clamps or the like be severed along the butt joint, characterized in that a deformable material in the form of a wire whose thermal conductivity is used as a sealant is roughly the same as that of the material (steel) of the casting molds. 2. Casting mold according to claim 1, characterized in that as a sealant a lead wire (9) is used. 3. Casting mold according to claims 1 and 2, characterized by in the parting line (7) between the half-shells (1,2), primarily in the area of the clamping points insertable spacers (8). 4. Casting mold according to claims 1 to 3, characterized in that that on the projectile half-shells (1, 2), primarily in the area of a housing base (10) and a mouth hole (lt) are congruently welded on tabs (3, 4), which are pierced and can be fastened to one another by means of screws (5) and nuts (6) are. The invention relates to a collapsible, primarily from original bullet casings produced, longitudinally divisible casting mold whose half-shells for testing the solidified Explosives filling for structure formation as well as free of voids and cracks underneath put together by sealants, like undivided (original) bullet casings with warm liquid Explosives poured out and after solidification of the explosives and loosening of the clamps or the like. Be severed along the butt joint. It is already known that a projectile is filled with explosives to be checked non-destructively by means of an X-ray examination. This review gives However, only information about larger voids and cracks, but not about the structure training and the form of solidification of the explosive. It is also known to be randomly filled with explosives The original projectile body can be cut transversely using an automatic hacksaw. This method is not only tedious, but also complex, since the Missile body is lost. This is a reliable and economical method at the beginning Mentioned shedding of explosives in dismountable ones made from original bullet casings Shapes that are filled during the production process like the other bullet casings and further treated, i.e. be cooled and thus a comparable quality level of production. The separable forms become after the solidification of the poured explosives, before by sawing the explosive charge alone - along the butt joint of the storey half-shells - separated. This also makes an assessment of the structure from the explosives filling possible. The casting molds are made from original bullet casings in a known manner Created by splitting in the middle and for pouring with all-round clamps joined together. The two half-shells are sealed against each other by inserting an appropriate seal based on wood-cardboard or asbestos-rock wool. However, this method has two major disadvantages. On the one hand arise in the area of the surrounding brackets deviating from the original floor, on the other hand, the heat flow is interrupted in the area of the parting line. As very Finally, it turns out to be disadvantageous that the seal only with itself before sawing Lets remove difficulty. With the conventional sealants it is also hardly possible to have a necessary for inserting a saw blade, appropriately wide and evenly all around to achieve a wide separation gap. Another separation of the casting charge, e.g. by tearing it apart, but does not provide any clear information about the structure of the structure and is also off Refuse for security reasons. The object of the invention is therefore to address these deficiencies eliminate and for the casting molds, where the casting charge after solidification through Saws are to be dismantled along the parting line, to create sealing and connecting means, which result in thermal conduction ratios largely corresponding to the original floor, d. H. simulate the solidification processes in the original floor as accurately as possible. According to the invention this is achieved in that as a sealant a deformable material in wire form is used, the thermal conductivity of which is about the same that of the material (steel) of the casting molds. One such material is lead, for example, in the form of lead wire can be inserted. Lead is not only sufficiently pliable and pliable as a sealing material deformable, but also in its thermal conductivity very close to that of steel, so that the heat flow at the parting line is not interrupted during casting. Farther lead is also sufficiently temperature-resistant, but easily removable for sawing. In order to achieve a gap width of the joint that is uniform all around, In addition to the lead seal, spacers can be inserted into the Be inserted. To connect the half-shells, brackets can be welded to these be, which have bores through which the half-shells are connected by screws will. The before joining and screwing the half-shells in addition Spacers inserted for the lead seal ensure, on the one hand, that the lead seal is not squeezed too much at any point, on the other hand that all around the the required gap width for inserting the saw is ensured.