CN111299503A - Design and manufacturing method of sand casting wood-plastic structure die - Google Patents

Abstract

The invention relates to a wood-plastic structure die which has the effect of high cost performance. The invention discloses a sand casting wood-plastic structure die which comprises an outer die I and an outer die II which are spliced to form a pump shell, wherein a runner mud core group with the same shape as the shape of an inner cavity of the pump shell is arranged between the outer die I and the outer die II; the core box is characterized by further comprising a plurality of core boxes, wherein a cavity with the same shape as the flow channel sand core group is formed in the core boxes, a sand core with the same shape as the flow channel sand core group is manufactured through the core boxes, and the core boxes are made of wood blocks, high polymer materials or a combination of the wood blocks and the high polymer materials. By means of the matching of the high polymer material and the wood block, the service life of the mold is prolonged.

Description

Design and manufacturing method of sand casting wood-plastic structure die

Technical Field

The invention relates to a wood-plastic structure die, in particular to a design and manufacturing method of a sand casting wood-plastic structure die.

Background

At present, a pump shell for manufacturing a large pump body as shown in figure 1 is manufactured by adopting a sand casting mode, and a large sand casting mould is mainly made of wood and aluminum materials, but because the wood is easy to damp and mildew, the wood is easy to damage, deform and wear in use, and customers with high quality requirements are gradually giving up; for the aluminum mould, the mould is wear-resistant and non-deformable, but the mould is expensive, non-corrosion-resistant, high in heat conductivity and poor in heat-insulating property. Therefore, the existing large-size sand casting mold has the problem of low cost performance.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a sand casting wood-plastic structure die which has the effect of high cost performance.

In order to achieve the technical purpose, the invention provides the following technical scheme: a sand casting wood-plastic structure die comprises an outer die I and an outer die II which are spliced to form a pump shell, wherein a runner mud core group with the same shape as an inner cavity of the pump shell is arranged between the outer die I and the outer die II, the outer die I and the outer die II are made of wood blocks, high polymer materials or the combination of the wood blocks and the high polymer materials, and the runner mud core group is formed by splicing the wood blocks;

the core box is characterized by further comprising a plurality of core boxes, wherein a cavity with the same shape as the flow channel sand core group is formed in the core boxes, a sand core with the same shape as the flow channel sand core group is manufactured through the core boxes, and the core boxes are made of wood blocks, high polymer materials or a combination of the wood blocks and the high polymer materials.

By adopting the technical scheme, the mechanical hardness of the high polymer material is higher than that of wood, the mechanical strength of the die is improved, the abrasion of the core box and the first and second outer dies after long-term use is prevented, and the service life of the die is prolonged. Meanwhile, the high polymer material has low heat conductivity, so that the reaction temperature required by casting the sand core is ensured, and the cost performance of the mold is improved.

Preferably, the flow channel sand core group comprises a flow channel sand core I, a flow channel sand core II, a flow channel sand core III and a flow channel sand core IV, the flow channel sand cores made of the flow channel sand core I and the flow channel sand core II are combined to form a water inlet sand core of the water pump, and the flow channel sand core III and the flow channel sand core IV are combined to form a water outlet sand core.

By adopting the technical scheme, the pump shell is generally of a symmetrical structure, the inner cavity of the pump shell is divided into two halves from the center line, the processing of the sand core is facilitated, and the operation convenience is improved.

Aiming at the defects in the prior art, the second purpose of the invention is to provide a manufacturing method of a sand casting wood-plastic structure mold, which has the effect of high cost performance.

In order to achieve the technical purpose, the invention provides the following technical scheme: a manufacturing method of a sand casting wood-plastic structure die comprises the following steps:

s1, respectively processing a first runner core, a second runner core, a third runner core and a fourth runner core by using wood, treating the first runner core, the second runner core, the third runner core and the fourth runner core by using putty, and then applying a release agent;

s2, brushing a composite material made of multiple layers of high polymer materials, blade-coating the composite material on one surface of a runner core, adhering wood blocks on a film by means of the high polymer materials, filling gaps among the wood blocks by using glue, the high polymer materials and a multilayer board or wood according to a wall thickness principle, and demolding after the high polymer materials are cured to form a core box;

s3, core boxes of a second flow channel loam core, a third flow channel loam core and a fourth flow channel loam core are sequentially manufactured in a mode of S2;

s4, splicing and fixing the first runner core I and the third runner core III which are positioned on the same side of the water pump, coating liquid high polymer materials outside the first runner core I and the third runner core III, filling a gap between the first runner core I and the third runner core III, and processing the solidified high polymer materials into a first outer mold;

s5, manufacturing a second outer die by means of the second runner core and the fourth runner core in a S4 mode.

By adopting the technical scheme, the core box is manufactured by the aid of the flow channel loam core. And (2) demolding, namely, directly adhering liquid high polymer materials and a multilayer board to the mud core group of the flow channel to process the external mold I and the external mold II without additionally producing the external mold I and the external mold II, so that the processing cost is reduced, meanwhile, the flexible high polymer material film can ensure that the shape of the mold is completely the same as that of a water pump, and the cost performance of the mold is improved.

Preferably, the polymer material is a material such as glass fiber, carbon fiber, or polyester fiber.

By adopting the technical scheme, because the sand core and the sand body are manufactured by tamping in a physical extrusion mode, the mould is not chemically damaged, most of high polymer materials can be used in the mould, and the realization difficulty is reduced.

Aiming at the defects in the prior art, the third purpose of the invention is to provide a manufacturing method of a sand casting wood-plastic structure die, which has the characteristic of high cost performance.

In order to achieve the technical purpose, the invention provides the following technical scheme: a manufacturing method of a sand casting wood-plastic structure die comprises the following steps:

s1, respectively processing a first runner core, a second runner core, a third runner core and a fourth runner core by using wood;

s2, coating a film made of a plurality of layers of high polymer materials on one surface of the runner core, adhering wood blocks on the film by means of glue, and filling gaps of the wood blocks with the glue to form a core box;

s3, core boxes of a second flow channel loam core, a third flow channel loam core and a fourth flow channel loam core are sequentially manufactured in a mode of S2;

s4, splicing and fixing the first runner core I and the third runner core III which are positioned on the same side of the water pump, and splicing wood outside the first runner core I and the third runner core III to form a first outer mold;

s5, manufacturing a second outer die by means of the second runner core and the fourth runner core in a S4 mode.

By adopting the technical scheme, after the core box is processed by the aid of the flow channel mud core group, wood is directly spliced on the flow channel mud core group to process the external mold I and the external mold II, the external mold I and the external mold II do not need to be produced additionally, processing cost is reduced, meanwhile, the flexible high polymer material film can ensure that the shape of the mold is completely the same as that of a water pump, and cost performance of the mold is improved.

Aiming at the defects in the prior art, the fourth purpose of the invention is to provide the manufacturing method of the sand casting wood-plastic structure die, which has the effect of convenient operation.

In order to achieve the technical purpose, the invention provides the following technical scheme: a use method of a sand casting wood-plastic structure mold comprises the following steps:

s1, reversely buckling a sand box outside a first outer mold, filling resin sand and tamping, taking the sand box and the first outer mold away, and inverting a sand body of a pump shell;

s2, reversely buckling the other sand box outside the outer mold, filling resin sand and tamping, taking the sand box and the outer mold II away, and inverting the sand body of the pump shell;

s3, sand cores in the shapes of a first runner sand core, a second runner sand core, a third runner sand core and a fourth runner sand core are manufactured by means of a core box respectively and are spliced and combined into a whole;

s4, placing the combined sand core into an outer mold sand mold of the sand mold, and pouring molten iron into a gap between the outer mold star and the runner sand core after splicing;

and S5, after the molten iron is naturally cooled and fixed, breaking the resin sand, and mashing the sand core in the resin sand, so that the pump shell can be processed.

By adopting the technical scheme, the mechanical strength of the mould is ensured by means of the matching of the high polymer material and the wood block, the service life of the mould is prolonged, the sizes of the manufactured sand core and the manufactured sand body are accurate, and the precision of the product is improved. Meanwhile, the production convenience is improved by the matching of the core box with the external mold I and the external mold II.

In summary, the present invention achieves the following effects:

1. by means of the matching of the high polymer material and the wood block, the service life of the die is prolonged;

2. by means of the matching of the runner mud core group and the high polymer material, the material required by the production of the external mold is saved.

Drawings

Fig. 1 is a schematic view of a pump casing to be produced in embodiment 1;

FIG. 2 is a schematic view for showing the overall structure in embodiment 1;

FIG. 3 is a schematic view showing a specific structure of a core box in example 1;

FIG. 4 is a schematic view showing a specific splicing manner of a core assembly of a runner in example 1;

FIG. 5 is a schematic illustration of the mating relationship of the face sand core and the pump housing sand body of example 1.

In the figure, 1, a first full mold (or a template mold); 2. a second sample outer die (or a template outer die); 3. a first flow channel sand core; 4. a second flow channel sand core; 5. a third flow channel sand core; 6. a flow channel sand core IV; 7. a core box.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1: a sand casting wood-plastic structure die is shown in figure 2 and comprises a first outer die 1 and a second outer die 2 which are spliced to form a pump shell, wherein a flow channel mud core group with the same shape as an inner cavity of the pump shell is arranged between the first outer die 1 and the second outer die 2, the first outer die 1 and the second outer die 2 are made of wood blocks and high polymer materials or the combination of the wood blocks and the high polymer materials, and the flow channel mud core group is formed by splicing the wood blocks.

As shown in fig. 3, the sand core box further comprises a plurality of core boxes 7, wherein a cavity with the same shape (containing shrinkage) as the flow channel sand core set is formed in the plurality of core boxes 7, a sand core with the same shape as the flow channel sand core set is manufactured through the plurality of core boxes 7, and the core boxes 7 are made of wood blocks, high polymer materials or a combination of the wood blocks and the high polymer materials. The mechanical hardness of the high polymer material is higher than that of wood, the mechanical strength of the die is improved, the core box 7, the outer die I1 and the outer die II 2 are prevented from being worn after long-term use, and the service life of the die is prolonged. Meanwhile, the high polymer material has low heat conductivity, so that the qualified reaction temperature required by casting the sand core is ensured, and the cost performance of the mold is improved.

As shown in fig. 4, the flow channel sand core group comprises a flow channel sand core I3, a flow channel sand core II 4, a flow channel sand core III 5 and a flow channel sand core IV 6, the flow channel sand core I3 and the flow channel sand core II 4 are combined to form a water outlet of the water pump, the flow channel sand core III 5 and the flow channel sand core IV 6 are combined to form a water inlet, the pump shell is generally of a symmetrical structure, and an inner cavity of the pump shell is divided into two halves from a central line, so that the processing of sand cores is facilitated.

A manufacturing method of a sand casting wood-plastic structure die comprises the following steps:

s1, respectively processing a first runner core (male die) 3, a second runner core (male die) 4, a third runner core (male die) 5 and a fourth runner core (male die) 6 by using wood, treating the male dies smoothly by using putty and the like, and applying a release agent;

s2, brushing a resin composite material made of multiple layers of high polymer materials on the surface of a flow channel mud core I3, adhering wood blocks on a film by means of glue substances, filling gaps among the wood blocks with the glue to form a core box 7, and reinforcing by using gun nails and the like;

s3, sequentially manufacturing a core box 7 of a flow channel sand core II 4, a flow channel sand core III 5 and a flow channel sand core IV 6 in an S2 mode;

s4, splicing and fixing a first runner core I3 and a third runner core III 5 which are positioned on the same side of the water pump, coating a liquid polymer material outside the first runner core I3 and the third runner core III 5, filling a gap between the first runner core I3 and the third runner core III 5, and processing the solidified polymer material into a first outer mold 1;

s5, manufacturing the outer mold 2 by means of the second flow channel sand core 4 and the fourth flow channel sand core 6 in the S4 mode.

After the core box 7 is processed by means of the runner mud core group, liquid high polymer materials are directly adhered to the runner mud core group to process the outer die I1 and the outer die II 2, the outer die I1 and the outer die II 2 do not need to be produced additionally, processing cost is reduced, meanwhile, the flexible high polymer material film can ensure that the shape of the die is completely the same as that of a water pump, and cost performance of the die is improved.

The high polymer material adopts glass fiber, carbon fiber or terylene, and because the sand core and the sand body are manufactured by tamping in a physical extrusion mode, the mould is not chemically damaged, most high polymer materials can be used in the mould, and the realization difficulty is reduced.

A using method of a sand casting wood-plastic structure mold is shown in figure 5 and comprises the following steps:

s1, firstly, placing a joint surface of an outer mold I1 in a manner of being attached to a working surface, reversely buckling a sand box outside the outer mold I1, filling yellow sand and tamping, taking the sand box and the outer mold I1 away, and inverting a sand body of a pump shell;

s2, placing the joint surface of the second outer mold 2 in a manner of being attached to the working surface, reversely buckling the other sand box outside the second outer mold 2, filling yellow sand and tamping, taking the sand box and the second outer mold 2 away, and inverting the sand body of the pump shell;

s3, sand cores in the shapes of a first runner sand core 3, a second runner sand core 4, a third runner sand core 5 and a fourth runner sand core 6 are manufactured by a core box 7 respectively and are spliced and combined into a whole;

s4, placing the combined sand core into one pump shell sand body, covering the other pump shell sand body on the pump shell sand body, and pouring molten iron into a gap between the pump shell sand body and the sand core;

and S5, after the molten iron is naturally cooled and fixed, smashing the sand body of the pump shell, and smashing the sand core in the sand body, so that the pump shell can be processed.

By means of the matching of the high polymer material and the wood block, the mechanical strength of the mold is guaranteed, the service life of the mold is prolonged, the sizes of the manufactured sand core and the manufactured sand body are accurate, and the precision of the product is improved. Meanwhile, the production convenience is improved by the matching of the core box 7 with the first outer die 1 and the second outer die 2.

Example 2: the difference between the embodiment and the embodiment 1 is that the manufacturing method of the sand casting wood-plastic structure die is different, and comprises the following steps:

s1, respectively processing a first runner core I3, a second runner core II 4, a third runner core III 5 and a fourth runner core IV 6 by using wood;

s2, attaching a film made of a plurality of layers of high polymer materials to the surface of the first runner core 3, then adhering wood blocks to the film by means of glue, filling gaps among the wood blocks with the glue, and taking out the first runner core 3 to form a core box 7;

s3, sequentially manufacturing a core box 7 of a flow channel sand core II 4, a flow channel sand core III 5 and a flow channel sand core IV 6 in an S2 mode;

s4, splicing and fixing a first flow channel sand core 3 and a third flow channel sand core 5 which are positioned on the same side of the water pump, and splicing wood outside the first flow channel sand core 3 and the third flow channel sand core 5 to form an outer mold 1;

s5, manufacturing the outer mold 2 by means of the second flow channel sand core 4 and the fourth flow channel sand core 6 in the S4 mode.

Claims (6)

1. The utility model provides a structure mould is moulded to sand casting wood which characterized in that: the pump shell comprises an outer die I (1) and an outer die II (2) which are spliced to form a pump shell, wherein a runner mud core group which is the same as the shape (including shrinkage) of a cavity in the pump shell is arranged between the outer die I (1) and the outer die II (2), the outer die I (1) and the outer die II (2) are made of wood blocks, high polymer materials or a combination of the wood blocks and the high polymer materials, and the runner mud core group is formed by splicing the wood blocks;

the core box is characterized by further comprising a plurality of core boxes (7), wherein a cavity with the same shape as the flow channel mud core group is formed in the plurality of core boxes (7), a sand core with the same shape as the flow channel mud core group is manufactured through the plurality of core boxes (7), and the core boxes (7) are made of wood blocks, high polymer materials or a combination of the wood blocks and the high polymer materials.

2. The sand casting wood-plastic structure die according to claim 1, which is characterized in that: the flow channel mud core group for manufacturing the core box comprises a flow channel mud core I (3), a flow channel mud core II (4), a flow channel mud core III (5) and a flow channel mud core IV (6), wherein the flow channel mud core I (3) and the flow channel mud core II (4) are combined to form a water inlet mud core of the water pump, and the flow channel mud core III (5) and the flow channel mud core IV (6) are combined to form a water outlet mud core.

3. A manufacturing method for the sand casting wood-plastic structural mold according to claim 2, characterized by comprising the following steps:

s1, respectively processing a first runner core (3), a second runner core (4), a third runner core (5) and a fourth runner core (6) by using wood or a multilayer board or wax;

s2, a film made of a plurality of layers of high polymer materials is attached to the surface of the first runner core (3), then wood blocks are attached to the film by means of glue, gaps among the wood blocks are filled with the glue, and the first runner core (3) is taken out to form a core box (7);

s3, sequentially manufacturing a core box (7) of a flow channel sand core II (4), a flow channel sand core III (5) and a flow channel sand core IV (6) in an S2 mode;

s4, splicing and fixing a first runner core I (3) and a third runner core III (5) which are positioned on the same side of the water pump, coating a liquid polymer material outside the first runner core I (3) and the third runner core III (5), filling a gap between the first runner core I (3) and the third runner core III (5), and processing the solidified polymer material into a first outer mold (1);

s5, manufacturing a second outer die (2) by means of the second flow channel sand core (4) and the fourth flow channel sand core (6) in a S4 mode.

4. The manufacturing method of the sand casting wood-plastic structure mold according to claim 3, characterized in that: the high polymer material is glass fiber, carbon fiber or terylene.

5. A manufacturing method for the sand casting wood-plastic structural mold according to claim 2, characterized by comprising the following steps:

s1, respectively processing a first runner core (3), a second runner core (4), a third runner core (5) and a fourth runner core (6) by using wood;

s2, a film made of a plurality of layers of high polymer materials is attached to the surface of the first runner core (3), then wood blocks are attached to the film by means of glue, gaps among the wood blocks are filled with the glue, and the first runner core (3) is taken out to form a core box (7);

s3, sequentially manufacturing a core box (7) of a flow channel sand core II (4), a flow channel sand core III (5) and a flow channel sand core IV (6) in an S2 mode;

s4, splicing and fixing the first runner core I (3) and the third runner core III (5) which are positioned on the same side of the water pump, and splicing wood outside the first runner core I (3) and the third runner core III (5) to form a first outer mold (1);

s5, manufacturing a second outer die (2) by means of the second flow channel sand core (4) and the fourth flow channel sand core (6) in a S4 mode.

6. The use method of the sand casting wood-plastic structure mold according to claim 2 is characterized by comprising the following steps:

s1, firstly, placing a joint surface of the outer mold I (1) in a manner of being attached to a working surface, reversely buckling a sand box outside the outer mold I (1), filling yellow sand and tamping, taking the sand box and the outer mold I (1) away, and inverting a sand body of a pump shell;

s2, placing the joint surface of the second outer mold (2) in a manner of being attached to the working surface, reversely buckling the other sand box outside the second outer mold (2), filling yellow sand and tamping, taking the sand box and the second outer mold (2) away, and inverting the sand body of the pump shell;

s3, sand cores in the shapes of a first runner sand core (3), a second runner sand core (4), a third runner sand core (5) and a fourth runner sand core (6) are manufactured by a core box (7) and are spliced and combined into a whole;

s4, placing the combined sand core into one pump shell sand body, covering the other pump shell sand body on the pump shell sand body, and pouring molten iron into a gap between the pump shell sand body and the sand core;

and S5, after the molten iron is naturally cooled and fixed, smashing the sand body of the pump shell, and smashing the sand core in the sand body, so that the pump shell can be processed.

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