CN2403518Y

CN2403518Y - Metal-wood-plastic composite structural casting mould

Info

Publication number: CN2403518Y
Application number: CN 99249514
Authority: CN
Inventors: 徐成林
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-10-15
Filing date: 1999-10-15
Publication date: 2000-11-01
Anticipated expiration: 2009-10-15

Abstract

The utility model relates to a casting mould, which makes use of metal or wood as a framework. The utility model is characterized in that an inner lining layer which is fixed to the framework, and a surface layer which makes use of ABS engineering plastic board materials to form a metal-wood-plastic composite structural mould. The utility model has the advantages of high size stability, strong shock resistance, toughness, corrosion resistance, abrasion resistance, easy secondary manufacture, short production periodicity, wood saving, and low cost, and is particularly suitable for producing the casting moulds of large-scale precision castings.

Description

Metal-wood-plastics composite construction mold

The utility model relates to a kind of mold and pattern for casting, in particular make this mold and pattern for casting surface and inner skeleton thereof meet the mold and pattern for casting that casting requires, has good casting character.

The content of its quality requirement of mold and pattern for casting comprises a lot, as the mold integral size stability, and corrosion resistance, mar proof, impact strength and toughness etc.Particularly large-scale high-precision foundry goods mould also needs its mould surface to have suitability for secondary processing preferably, and its above quality requirement is more crucial.Yet all there is in various degree defective in existing mold and pattern for casting as wooden model, metal pattern, plastics mould, metal-wooden composite construction mould etc., and the wooden model life-span is short, and the metal pattern production cycle is long, and plastics mold materials toxicity is big, make complexity.Therefore, the mold and pattern for casting of existing each version all is difficult to adapt to the requirement that the mold that modern production pursues is with short production cycle, dimensional stability good, precision is high, be easy to revise processing and be fit to produce in batches foundry goods.So the mold of existing each structure type is also imperfect, especially in the mold of large-scale precision castings production was prepared, it was difficult more to seem, its casting die structure is produced difficult as people's will.

Goal of the invention of the present utility model is to provide a kind of mold and pattern for casting, the top layer of this mold and pattern for casting can meet the casting requirement to greatest extent, particularly the composite construction mold of a kind of metal-wood-plastics of more apparent its superiority in the large-scale high-precision castings production.

The novel mold that the utility model proposed, the technology contents of its technical scheme is: the compound mold of this metal-wood-plastics is to mix the skeleton that structure is with hardware or metal and timber compoment, and its difference that is different from prior art is in the mold top layer that is fixed with inner liner and ABS engineering plastics sheet material on skeleton.

The composite construction mold of the metal-wood-plastics of the utility model design; original plank mold top layer is replaced by ABS engineering plastics sheet material; become the inner liner on ABS engineering plastics sheet material top layer; the mold of this version not only has better inner support; on supporting, improves on skeleton the compression strength and the toughness of mold; and the design of lining reduced existing mold with timber during as mould surface to wooden high requirement; so the material of lining can be selected magnesia or other relatively poor timber of material for use; save a large amount of precious resources, helped environmental protection.ABS engineering plastics sheet material is acrylonitrile-butadiene-styrene termonomer copolymer, again through the tight of high-pressure extrusion moulding, imperforate even lumber, it has good mold physicochemical property, as water absorption rate only is 1/70～1/80 of timber, heat distortion temperature is 98 ℃, and linear expansion coefficient is 6～9.5 * 10 ^-5/ ℃ ^-1, thereby mold can not be out of shape because of the variation of working environment, guaranteed the stability of mold dimensional accuracy; It also has good tensile strength, flexural strength, compression strength and toughness, especially water, inorganic salts, alkali and acids are to its almost not influence, corrosion resistance is strong, be not subjected to the self-hardening sand furane resins and as the erosion of the p-methyl benzenesulfonic acid of curing agent, so be more suitable for chill fat sand molding condition, be fabulous pattern-making material than metal.Again, the ABS engineering plastics also have good suitability for secondary processing, deflection became different shape when heat was heated, matched molds can be changed mutually, sawing, boring, milling and polishing, acute angle is not lost during cutting, the not sticking cutter of chip curling, cutter does not have wearing and tearing, but the connection place flame and the ABS welding rod welded type of sheet material are bonding, it is big to change original all types of mould surface maintenance load greatly, process the present situation of finishing difficulty, and the modification easier adjustment of processing when mold dimensional accuracy and design drawing variation and definite, the mold quality improved greatly, shortened the production cycle of mold, simplified production process, reduced production cost.Therefore, this is skeleton with gold, timber compoment, with the ABS engineering plastics is the casting that the mold of mould surface is more suitable for the large-scale precision foundry goods, the structural design of this mold overcomes the technical barrier that is difficult to reach each side such as specified accuracy, maintenance and production timeliness in the manufacturing of large-scale precision mold, for the production of large-scale precision foundry goods is laid a good foundation.

Describe technology contents of the present utility model in detail below in conjunction with the following enforcement structure chart that exemplifies.

Fig. 1 is the foundary methods drawing of a certain foundry goods

Fig. 2 is the split casting die structure schematic diagram of foundry goods shown in Figure 1.

As shown in the figure, the mold of metal-wood of the present utility model-plastics composite construction, it is to form skeleton 1 by channel-section steel, angle steel or square tube etc. by welding or bolting together, part timber is as supporting indirectly, circular arc flanged plate 6 as shown in FIG., rectangular Wooden Batten 4 and as the spacer 7 of the connection place of each plank of inner liner 3, the plank of inner liner 3 is fixed on skeleton 1 and supports indirectly, ABS engineering plastics sheet material is reinforced with wood screw by the bonding back of seccotine, be fixed on skeleton 1 and the inner liner 3, as the top layer 2 of mold.In casting technique Fig. 1, the thick black line at its edge is the cast top layer 2 that is fixed on the ABS engineering plastics sheet material on skeleton 1 and the inner liner 3, and its inner foundry goods part then be the part mould space of skeleton 1 with inner liner 3 compositions shown in Figure 2.What the 1# among the figure, 2#, 3#, 4#, 5# represented is 1#, 2#, 3#, 4#, 5# core.

This structural design, make is that the plank on top layer becomes inner liner 3 originally, especially played the reinforcing supporting role for the mold production of large-scale precision foundry goods, thereby greatly reduce material requirement to it, so the material of inner liner 3 also can be magnesia, but be further to improve its supporting role, its lining 3 can be selected the material lines bonding glued board of multilayer gluing that intersects for use.

Claims

1, a kind of metal-wood-plastics composite construction mold, it is with hardware or metal and the mixed skeleton (1) that constitutes of timber compoment, it is characterized in that being fixed with on skeleton the mold top layer (2) of inner liner (3) and ABS engineering plastics sheet material.

2, composite construction mold according to claim 1 is characterized in that its inner liner (3) glues together the glued board that forms for the multilayer lines intersects.

3, composite construction mold according to claim 1 is characterized in that its inner liner (3) makes for magnesia.