CN108044049B - Method for manufacturing vertical column sand mold - Google Patents
Method for manufacturing vertical column sand mold Download PDFInfo
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- CN108044049B CN108044049B CN201711484081.7A CN201711484081A CN108044049B CN 108044049 B CN108044049 B CN 108044049B CN 201711484081 A CN201711484081 A CN 201711484081A CN 108044049 B CN108044049 B CN 108044049B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Abstract
The invention provides a method for manufacturing a stand column sand mold, which comprises the following steps: (1) manufacturing a core: a. assembling a core mold, namely assembling and fastening the side wall of the core mold and the bottom plate of the mold cavity to form a firm mold cavity of the core mold; b. molding, namely filling molding sand into the cavity, and compacting and molding; c. demolding, after molding, detaching the side wall of the mold core mold from the cavity bottom plate, and taking out the molded part to obtain a mold core; (2) manufacturing an upper die; (3) manufacturing a lower die; (4) and manufacturing the stand column sand mold, loading the mold core into the upper mold, enabling the molding surface of the mold core to face the lower mold, matching the back surface of the mold core with the inner wall of the upper mold cavity, closing the upper mold and the lower mold, and enabling the pouring channel of the upper mold cavity bottom plate to correspond to the pouring channel of the lower mold cavity bottom plate, thereby obtaining the sand mold for manufacturing the stand column.
Description
Technical Field
The invention relates to the technical field of sand mold manufacturing, in particular to a method for manufacturing a stand column sand mold.
Background
Sand casting refers to a casting process that produces a casting in a sand mold. Steel, iron and most nonferrous metal castings can be obtained by sand casting. Sand casting is one of casting processes, and a casting mold used for sand casting is generally formed by combining an outer sand mold and a core. The molding material used for sand casting is cheap and easy to obtain, the casting mould is simple and convenient to manufacture, and the casting mould can adapt to single-piece production, batch production and mass production of castings, and is a basic process in casting production for a long time.
In sand casting the mould is made of wood or other metal material. In this process, the mold is sized slightly larger than the finished product, with the difference called the shrinkage margin. Wherein the purpose is to act the molten metal against the mold to ensure that the molten metal solidifies and contracts, thereby preventing voids during casting.
The basic raw materials for making sand molds are foundry sand and a sand binder. The most commonly used foundry sand is siliceous sand. When the high-temperature performance of the silica sand can not meet the use requirement, special sand such as zircon sand, chromite sand, corundum sand and the like is used. In order to make the sand molds and cores with certain strength and without deformation or damage during handling, molding and pouring of liquid metal, a sand binder is generally added to the casting to bind the loose sand particles together to form the molding sand.
The upright column is one of important parts on a machine tool, is a non-scale complex part, and is generally formed by casting a sand mold, in the process of manufacturing the sand mold, a formed sand mold casting needs to be taken out of the mold during demolding, however, when the surface structure of the casting is complex, the sand mold casting is easy to crack or adhere to the inner cavity of the mold during demolding, the demolding difficulty is high, and the obtained sand mold cannot meet the use requirement.
Disclosure of Invention
The invention aims to provide a method for manufacturing a vertical column sand mould aiming at the defects.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a manufacturing method of a stand column sand mould comprises a core mould, an upper mould manufacturing mould and a lower mould manufacturing mould; the mold core mold comprises a mold core mold cavity, the inner wall of the mold cavity and the bottom plate of the mold cavity are provided with molding surfaces matched with the molding part of the mold core mold, and the side wall of the mold core mold is detachably and fixedly connected with the bottom plate of the mold cavity;
the lower die manufacturing die comprises a lower die cavity, and a lower forming part and a pouring gate are arranged on a bottom plate of the lower die cavity; the upper die manufacturing die comprises an upper die cavity, an upper forming part and a pouring gate are arranged on a bottom plate of the upper die cavity, a pouring gate is arranged on the pouring gate, and the pouring gate of the bottom plate of the upper die cavity corresponds to the pouring gate of the bottom plate of the lower die cavity;
the manufacturing method of the upright column sand mold comprises the following steps:
(1) manufacturing cores
a. Assembled core mould
Assembling and fastening the side wall of the core mold and the bottom plate of the mold cavity to form a firm mold core mold cavity;
b. shaping of
Filling molding sand into the cavity, and compacting and molding;
c. demoulding
After molding sand is formed, detaching the side wall of the mold core mold from the cavity bottom plate, and taking out the formed part to obtain a mold core;
(2) manufacturing upper die
Adding molding sand into the upper molding and molding, compacting, and taking out after molding to obtain an upper mold;
(3) manufacture of lower moulds
Adding molding sand into the lower mold for molding, compacting, and taking out after molding to obtain a lower mold;
(4) sand mould for manufacturing upright column
And (3) loading the mold core into the upper mold, enabling the molding surface of the mold core to face the lower mold, enabling the back surface of the mold core to be matched with the inner wall of the cavity of the upper mold, closing the upper mold and the lower mold, and enabling the pouring channel of the bottom plate of the upper mold cavity to correspond to the pouring channel of the bottom plate of the lower mold cavity, so as to obtain the sand mold for manufacturing the stand column.
Furthermore, a processing allowance groove is formed in the intersection of the adjacent bulges on the cavity bottom plate, the cavity is a rectangular cavity and comprises two long side walls and two short side walls, the long side walls are detachably and fixedly connected with the bottom plate, and the short side walls and the bottom plate are integrally formed; the side edges of the short side walls and the long side walls are assembled into convex edges, and grooves meshed with the convex edges are formed in the inner walls of the long side walls; fastening grooves are formed in the two sides of the long side wall, the fastening grooves are located outside the short side wall, and the oppositely arranged long side wall is fixed to the two sides of the bottom plate and the two sides of the short side wall through fastening pieces inserted into the fastening grooves; the fastener comprises a double-end bolt and a nut which are matched with each other, and the nut is provided with a tightening handle;
the upper part of the cavity is provided with a separable body, and the lower surface of the separable body is matched with the upper surface of the cavity; the lower surface of the separable body comprises a partial inclined surface, and an obtuse angle is formed between the inclined surface and the non-inclined surface; the separable body is provided with a positioning pin hole, and the upper surface of the cavity is provided with a pin hole corresponding to the positioning pin hole; an end-up handle is arranged outside the separable body.
Further, the step (1) includes the steps of:
a. assembled core mould
The long side wall grooves on the two long side walls are clamped with the short side wall convex edges on the short side walls, the stud bolts are installed in the fastening grooves, and nuts are screwed at the two ends of the stud bolts to tightly fix the two long side walls on the two sides of the bottom plate so as to form a firm cavity; then the separable body is assembled on the upper part of the cavity, the inclined plane of the lower surface of the separable body is correctly matched with the corresponding inclined plane of the upper surface of the cavity, and a positioning pin is inserted into the pin hole to form a cavity;
b. shaping of
Filling molding sand into the cavity, and compacting and molding;
c. demoulding
And after molding sand is formed, pulling out the positioning pin, separating the separable body from the cavity, unscrewing the nut, taking out the stud, removing the two long side walls, and taking out the formed part to obtain the mold core.
Furthermore, the pouring channel on the bottom plate of the lower cavity is a side pouring channel, the pouring channel on the bottom plate of the upper cavity is a cross pouring channel, and the pouring gate is arranged in the middle of the cross pouring channel.
Furthermore, the lower cavity bottom plate is provided with a lower slope, the upper cavity bottom plate is provided with an upper slope corresponding to the lower slope in position, the inclination directions of the upper slope and the lower slope are opposite, and the inclination angles are the same.
Further, in the step (4), in the process of closing the upper mold and the lower mold, the slope of the upper mold formed at the upper slope is just engaged with the slope of the lower mold formed at the lower slope.
Further, the upright column comprises an upright column body, the upright column body comprises a connecting surface, the connecting surface vertically extends from the top surface to the bottom surface of the upright column body, and the connecting surface divides the upright column body into a front cavity and a back cavity; the support seats are arranged below the upright post body, extend from the lower part of the bottom surface to two sides and are symmetrically distributed, so that a bottom groove is formed below the bottom surface;
a support reinforcing rib is arranged at the joint of the support and the side wall; the cross section of the support reinforcing rib is a right-angled triangle, and the hypotenuse of the right-angled triangle extends to the side edge of the support from the side wall.
Further, the lower molding part comprises a reinforcing rib lower molding part for molding the reinforcing rib of the lower support; the upper forming part comprises a reinforcing rib upper forming part for forming the reinforcing rib of the upper support.
Furthermore, a reinforcing rib groove is formed in the middle of the support reinforcing rib, and the reinforcing rib groove is formed downwards perpendicular to the upper surface of the support; a reinforcing rib groove lower forming part is arranged below the reinforcing rib lower forming part, and a reinforcing rib groove upper forming part is arranged below the reinforcing rib upper forming part; the manufacturing mold of the stand column sand mold further comprises a manufacturing mold for molding a core of the reinforcing rib groove.
Furthermore, the manufacturing mold is provided with a manufacturing mold cavity matched with the mold core for forming the reinforcing rib groove, and the manufacturing mold comprises a first manufacturing mold and a second manufacturing mold which are symmetrical to each other.
Compared with the prior art, the invention has the following beneficial effects:
according to the manufacturing method of the upright column sand mold, the core mold, the upper mold manufacturing mold and the lower mold manufacturing mold are used for manufacturing the core, the upper mold and the lower mold respectively, and then the core, the upper mold and the lower mold are assembled to obtain the upright column sand mold, so that the manufacturing process is simplified, mutual interference generated during manufacturing of the core, the upper mold and the lower mold is avoided, and the obtained mold is compact in structure and reasonable in arrangement. The mold core mold cavity is designed into a plurality of separable parts, after molding is completed, the mold cavities are separated one by one, so that the contact area between the casting and the mold cavities is gradually reduced, and finally the casting is taken out, so that the separation difficulty is greatly reduced. The invention is especially suitable for manufacturing sand molds with complex structures, can avoid the surface of the sand mold from cracking or being bonded in the inner cavity of the mold in the demolding process, and improves the yield.
The processing allowance groove is arranged at the intersection of the adjacent bulges on the bottom plate of the mold core mold cavity body, so that the defect caused by the molding of sharp corners at the position can be prevented. Install fastener and fastening groove in the die cavity outside to can not produce any influence to the foundry goods, set up detachable body on cavity upper portion, reduce the die cavity height, decompose the dismantlement of die cavity lateral wall into detachable body and cavity lateral wall, further ensure that the lateral wall dismantlement in-process can not influence foundry goods surface quality, reduce the drawing of patterns degree of difficulty. But the setting of locating pin hole and inclined plane prevents that the relative slip from taking place for detachable body and cavity, and the setting of arch and recess prevents to take place the relative slip between long lateral wall and the short lateral wall, improves the fastening nature that can dismantle the die cavity.
Drawings
FIG. 1 is a front view and a side view of a core molding in an embodiment of the invention;
FIG. 2 is a top view of a core-cavity body in an embodiment of the invention;
FIG. 3 is a top view of a core cavity body with a separable body attached thereto in accordance with an embodiment of the present invention;
FIG. 4 is a front view of FIG. 3;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a block diagram of a mandrel mask according to an embodiment of the present invention after removal, with fasteners not shown;
FIG. 7 is a top view of an upper mold making die according to an embodiment of the present invention;
FIG. 8 is a front view of FIG. 7, showing the upper cavity side walls, gates and runners;
FIG. 9 is a top view of a lower die manufacturing die in accordance with an embodiment of the present invention;
FIG. 10 is a front view of FIG. 9;
FIG. 11 is a perspective view of a column according to an embodiment of the present invention;
FIG. 12 is a perspective view of another angle of the embodiment of the present invention;
fig. 13 is a structural view of a manufacturing mold according to an embodiment of the present invention.
Wherein, 1-type core mold, 11-long side wall, 111-pin hole, 112-long side wall groove, 12-short side wall, 121-short side wall convex edge, 13-type cavity bottom plate, 131-bottom plate reinforcing rib, 132-processing allowance groove, 15-separable body, 151-end starting handle, 152-inclined surface, 16-fastener, 161-stud bolt, 162-nut, 163-fastening groove, 17-type core mold bulge and 18-type core mold forming part;
2-lower molding, 23-lower cavity bottom plate, 231-side pouring channel, 232-lower slope, 233-lower forming part, 2331-lower forming part of reinforcing rib groove and 2332-lower forming part of reinforcing rib;
3-upper molding and molding, 33-upper cavity bottom plate, 331-cross runner, 332-upper slope, 333-sprue, 334-upper forming part, 3341-reinforcing rib groove upper forming part, 3342-reinforcing rib upper forming part, 3343-upper forming part top surface, 3345-upper forming part protrusion, 3346-overflow groove forming part, 3347-bevel edge forming part;
4-column, 41-column body, 411-top surface, 412-bevel edge, 413-connecting surface, 4131-connecting surface reinforcing rib, 4132-hoisting hole, 414-back surface, 4141-back surface cavity, 4142-mounting slide rail, 415-bottom surface, 4151-bottom groove, 416-support, 4161-support reinforcing rib, 4163-reinforcing rib groove and 4162-mounting hole;
51-first manufacturing mold, 52-second manufacturing mold, 53-manufacturing mold cavity, 54-parting plane.
Detailed Description
For a further understanding and appreciation of the structural features and advantages of the invention, reference should be made to the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, in which:
as shown in fig. 11 and 12, the pillar 4 includes a pillar body 41, the pillar body 41 includes a connecting surface 413, the connecting surface 413 extends vertically from a top surface 411 to a bottom surface 415 of the pillar body 41, the connecting surface 413 divides the pillar body 41 into a front cavity and a back cavity 4141, and the connecting surface 413 is provided with a hoisting hole 4132;
the front cavity is internally provided with a plurality of connecting surface reinforcing ribs 4131 arranged on the connecting surface 413, the connecting surface reinforcing ribs 4131 are connected with the left side wall and the right side wall of the upright post body 41 and connected with the top surface 411 and the bottom surface 415 of the upright post body 41, and the connecting surface reinforcing ribs 4131 and the hoisting holes 4132 are arranged in a staggered manner; the vertical distance between the upper half end surface of the side wall of the front cavity and the connecting surface is gradually increased from top to bottom to form a bevel edge 412;
the back cavity 4141 has no top surface, the back 414 is integrally formed with mounting rails 4142, the mounting rails 4142 are symmetrically disposed on two sides of the outside of the back cavity 4141, and extend downward from the top surface 411 to the top of the bottom surface 415;
a support 416 is arranged below the upright post body 41, the support 416 extends from the lower part of the bottom surface 415 to two sides and is symmetrically distributed, so that a bottom groove 4151 is formed below the bottom surface 415, and a mounting hole 4162 is formed on the support 416;
a support reinforcing rib 4161 is arranged at the joint of the support 416 and the side wall; the middle part of the reinforcing rib is provided with a reinforcing rib groove 4163, and the reinforcing rib groove 4163 is vertical to the upper surface of the support 416 and is arranged downwards;
the cross-section of the seat ribs 4161 is a right triangle with the hypotenuse extending from the side wall to the side of the seat 416.
A method for manufacturing a vertical column sand mold comprises a core mold 1, an upper mold manufacturing mold 3 and a lower mold manufacturing mold 2;
as shown in fig. 2, which is a plan view of the cavity of the core mold 1, the core mold 1 is used for molding and manufacturing the core mold 18 shown in fig. 1, and the core mold 18, that is, the connecting surface 413 and the connecting surface rib 4131 of the pillar 4. The core mold member 18 has a plurality of diamond-shaped ribs on its surface. The ribs have a plurality of intersections, so that the surface of the core mold forming part 18 has a plurality of sharp corners, and defects are easily generated during forming.
The cavity die 1 comprises a core die cavity, the inner wall of the cavity and the cavity bottom plate 13 of the cavity are provided with shapes matched with the forming part of the core die forming part 18, and the side wall of the core die 1 is detachably and fixedly connected with the cavity bottom plate 13 of the cavity;
the core mold 1 comprises a core mold cavity, the cavity is a rectangular cavity and comprises two long side walls 11 and two short side walls 12, the long side walls 11 are detachably fastened and connected with a cavity bottom plate 13, and the short side walls 12 and the cavity bottom plate 13 are integrally formed. The inner wall of the cavity and the bottom plate 13 of the cavity are provided with a core mold bulge 17 and a bottom plate reinforcing rib 131 which are matched with the molding part of the sand mold, the positions of the core mold bulge 17 and the bottom plate reinforcing rib 131 correspond to the positions of the bulge and the reinforcing rib on the core mold molding part 18, and the size of the core mold bulge 17 and the reinforcing rib is slightly larger than the size of the bulge and the reinforcing rib on the core mold molding part 18.
The intersection of the adjacent reinforcing ribs 131 on the cavity bottom plate 13 is provided with a processing allowance groove 132 to prevent the sharp corner forming at the intersection from generating defects.
As shown in fig. 2 and 6, the side of the short sidewall 12 assembled with the long sidewall 11 is a short sidewall convex edge 121, and the inner wall of the long sidewall 11 is provided with a groove 112 engaged with the short sidewall convex edge 121, so that the long sidewall 11 and the short sidewall 12 are locked together without relative sliding.
As shown in fig. 4, 5 and 6, the fastening slots 163 are formed on both sides of the long side wall 11, the fastening slots 163 are located outside the short side walls 12, and the fastening mechanism is arranged outside the mold cavity without affecting the casting. The oppositely disposed long side walls 11 are fixed to both sides of the cavity bottom plate 13 and the short side walls 12 by the fastening pieces 16 inserted into the fastening grooves 163. The fastening member 16 includes a stud bolt 161 and a nut 162 which are engaged with each other, the nut 162 having a tightening knob for easy screwing, and the nut 162 having an outer diameter larger than the width of the fastening groove 163.
As shown in fig. 3, 4 and 6, the upper part of the chamber is provided with a separable body 15, and the lower surface of the separable body 15 is engaged with the upper surface of the chamber. The lower surface of the detachable body 15 includes a partial inclined surface 152, and the inclined surface 152 forms an obtuse angle with the non-inclined surface, and the lower end of the inclined surface is located above the fastening groove 163. The inclined surface 152 is provided to form a turning line on the separable surface, thereby preventing the separable body 15 and the upper portion of the cavity from sliding relatively after being assembled. In addition, a positioning pin hole 111 is arranged on the separable body 15, and a pin hole corresponding to the positioning pin hole is arranged on the upper surface of the cavity; the outer part of the short side of the separable body 15 is provided with a cuboid-shaped end-lifting handle 151, and the end-lifting handle 151 is convenient for placing or taking away the separable body 15 on the cavity.
Before the molding sand is filled into the cavity, the grooves 112 on the two long side walls 11 are clamped with the short side wall convex edges 121 on the short side walls, the stud bolts 161 are installed in the fastening grooves 163, and the two long side walls 11 are tightly fixed on the two sides of the cavity bottom plate 13 by screwing the nuts 162 at the two ends of the stud bolts 161, so that a firm cavity is formed. The separable body 15 is then assembled to the upper portion of the cavity, and the inclined surface 152 of the lower surface of the separable body 15 is properly fitted to the corresponding inclined surface of the upper surface of the cavity, and the positioning pin is inserted into the pin hole 111 to form a cavity.
After the molding sand is filled into the cavity and molded, the positioning pin is pulled out, the separable body 15 is separated from the cavity, the nut 162 is unscrewed, the stud bolt 161 is taken out, and the molded sand mold is taken out after the two long side walls 11 are removed.
The lower molding die 2 comprises a lower cavity, and a lower molding part 233 and a side runner 231 are arranged on a bottom plate 23 of the lower cavity; the upper molding and making mold 3 comprises an upper cavity, an upper forming part 334 and a cross runner 331 are arranged on the bottom plate 33 of the upper cavity, a sprue 333 is arranged in the middle of the cross runner 331, and the side runner 231 is matched with the cross runner 331.
The lower cavity floor 23 is provided with a lower ramp 232 and the upper cavity floor 33 is provided with an upper ramp 332 cooperating with the lower ramp 232, the upper ramp 332 being inclined in the opposite direction to the lower ramp 232. The lower slope 232 enables the surface of the prepared lower die cavity to be two planes with different heights, and the two planes are connected by the slope; the upper slope 332 enables the surface of the prepared upper die cavity to be two planes with different heights, and the two planes are connected by the slope, so that when the upper die and the lower die are closed, the two slopes with opposite inclination directions can be just clamped together, and the closing precision is improved.
The lower molding part 233 includes a reinforcing bar lower molding part 2332 for molding the lower seat reinforcing bar; the upper molding part 334 includes a reinforcing bar upper molding part 3342 for molding the upper support reinforcing bar, and when the prepared upper mold and lower mold are closed, the molding surfaces of the reinforcing bar lower molding part 2332 and the reinforcing bar upper molding part 3342 just compose the molding cavity of the support reinforcing bar.
A reinforcing rib groove lower forming part 2331 is arranged below the reinforcing rib lower forming part 2332, and a reinforcing rib groove upper forming part 3341 is arranged below the reinforcing rib upper forming part 3342; the mold further includes a manufacturing die for forming the core of the bead groove 4163.
The manufacturing mould is provided with a manufacturing mould cavity 53 matched with the core of the forming reinforcing rib groove 4163, the manufacturing mould comprises a first manufacturing mould 51 and a second manufacturing mould 52 which are symmetrical with each other, and the matching position of the first manufacturing mould 51 and the second manufacturing mould 52 is a parting surface 54;
the upper molding portion 334 includes an upper molding portion top surface 3343 corresponding to the outer surface of the core mold 18, the upper molding portion top surface 3343 is provided with an upper molding portion protrusion 3345 matching with the core mold protrusion 17, the side surface of the upper molding portion 334 is provided with a bevel edge molding portion 3347 of the molding bevel edge 412, and the bevel edge molding portion 3347 is provided with an overflow groove molding portion 3346 for molding an overflow groove.
The method for manufacturing the upright column sand mold by using the mold comprises the following steps:
(1) manufacturing cores
a. Assembled core mould
Before filling molding sand into the core mold cavity, clamping the long side wall grooves 112 on the two long side walls 11 with the short side wall convex edges 121 on the short side walls, installing the stud bolts 161 in the fastening grooves 163, and tightly fixing the two long side walls 11 on the two sides of the bottom plate 13 by screwing the nuts 162 at the two ends of the stud bolts 161 to form a firm cavity; then the separable body 15 is assembled on the upper part of the cavity, the inclined surface 152 of the lower surface of the separable body 15 is correctly matched with the corresponding inclined surface of the upper surface of the cavity, and a positioning pin is inserted into the pin hole 111 to form a cavity;
b. shaping of
Filling molding sand into the cavity, and compacting and molding;
c. demoulding
After molding sand, pulling out the positioning pin, separating the end of the separable body 15 from the cavity, unscrewing the nut 162, taking out the stud bolt 161, removing the two long side walls 11, and taking out the molded core;
(2) manufacturing upper die
Adding molding sand into the upper molding and molding, compacting, and taking out after molding to obtain an upper mold;
(3) manufacture of lower moulds
Adding molding sand into the lower mold for molding, compacting, and taking out after molding to obtain a lower mold;
(4) sand mould for manufacturing upright column
And (3) placing the core into an upper die, enabling the molding surface of the core to face the lower die, matching the back surface of the core with the inner wall of a cavity of the upper die, placing the reinforcing rib groove core into a cavity formed by the upper molding part 3342 of the reinforcing rib, closing the upper die and the lower die, enabling the slope of the upper die to be just clamped with the slope of the lower die, and enabling the side pouring channel to correspond to the cross pouring channel, thus obtaining the sand die for manufacturing the stand column.
And (3) adopting the sand mould direction to manufacture the stand column, injecting liquid metal through a pouring gate, filling the cavity through a cross runner and a side runner, cooling and molding, demoulding to obtain a stand column blank, and further performing surface treatment to obtain the stand column.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The manufacturing approach of a kind of pillar sand mould, characterized by that, this manufacturing approach uses the manufacturing mould of the pillar sand mould, the manufacturing mould of the said pillar sand mould includes the core mould, upper moulding makes the mould and lower mould to make the mould; the mold core mold comprises a mold core mold cavity, the inner wall of the mold cavity and the bottom plate of the mold cavity are provided with molding surfaces matched with the molding part of the mold core mold, and the side wall of the mold core mold is detachably and fixedly connected with the bottom plate of the mold cavity;
the lower die manufacturing die comprises a lower die cavity, and a lower forming part and a pouring gate are arranged on a bottom plate of the lower die cavity; the upper die manufacturing die comprises an upper die cavity, an upper forming part and a pouring gate are arranged on a bottom plate of the upper die cavity, a pouring gate is arranged on the pouring gate, and the pouring gate of the bottom plate of the upper die cavity corresponds to the pouring gate of the bottom plate of the lower die cavity;
the manufacturing method of the upright column sand mold comprises the following steps:
(1) manufacturing cores
a. Assembled core mould
Assembling and fastening the side wall of the core mold and the bottom plate of the mold cavity to form a firm mold core mold cavity;
b. shaping of
Filling molding sand into the cavity, and compacting and molding;
c. demoulding
After molding sand is formed, detaching the side wall of the mold core mold from the cavity bottom plate, and taking out the formed part to obtain a mold core;
(2) manufacturing upper die
Adding molding sand into the upper molding and molding, compacting, and taking out after molding to obtain an upper mold;
(3) manufacture of lower moulds
Adding molding sand into the lower mold for molding, compacting, and taking out after molding to obtain a lower mold;
(4) sand mould for manufacturing upright column
The method comprises the following steps of (1) loading a mold core into an upper mold, enabling a molding surface of the mold core to face a lower mold, enabling the back surface of the mold core to be matched with the inner wall of a cavity of the upper mold, closing the upper mold and the lower mold, and enabling a pouring channel of a bottom plate of the upper mold cavity to correspond to a pouring channel of a bottom plate of the lower mold cavity in position to obtain a sand mold for manufacturing;
a processing allowance groove is formed in the intersection of the adjacent bulges on the cavity bottom plate, the cavity is a rectangular cavity and comprises two long side walls and two short side walls, the long side walls are detachably and fixedly connected with the bottom plate, and the short side walls and the bottom plate are integrally formed; the side edges of the short side walls and the long side walls are assembled into convex edges, and grooves meshed with the convex edges are formed in the inner walls of the long side walls; fastening grooves are formed in the two sides of the long side wall, the fastening grooves are located outside the short side wall, and the oppositely arranged long side wall is fixed to the two sides of the bottom plate and the two sides of the short side wall through fastening pieces inserted into the fastening grooves; the fastener comprises a double-end bolt and a nut which are matched with each other, and the nut is provided with a tightening handle;
the upper part of the cavity is provided with a separable body, and the lower surface of the separable body is matched with the upper surface of the cavity; the lower surface of the separable body comprises a partial inclined surface, and an obtuse angle is formed between the inclined surface and the non-inclined surface; the separable body is provided with a positioning pin hole, and the upper surface of the cavity is provided with a pin hole corresponding to the positioning pin hole; an end-up handle is arranged outside the separable body.
2. The method for manufacturing the pillar sand mold as claimed in claim 1, wherein the step (1) comprises the steps of:
a. assembled core mould
The long side wall grooves on the two long side walls are clamped with the short side wall convex edges on the short side walls, the stud bolts are installed in the fastening grooves, and nuts are screwed at the two ends of the stud bolts to tightly fix the two long side walls on the two sides of the bottom plate so as to form a firm cavity; then the separable body is assembled on the upper part of the cavity, the inclined plane of the lower surface of the separable body is correctly matched with the corresponding inclined plane of the upper surface of the cavity, and a positioning pin is inserted into the pin hole to form a cavity;
b. shaping of
Filling molding sand into the cavity, and compacting and molding;
c. demoulding
And after molding sand is formed, pulling out the positioning pin, separating the separable body from the cavity, unscrewing the nut, taking out the stud, removing the two long side walls, and taking out the formed part to obtain the mold core.
3. The method for manufacturing a pillar sand mold according to claim 1, wherein the runner of the lower cavity bottom plate is a side runner, the runner of the upper cavity bottom plate is a runner, and the gate is arranged in the middle of the runner.
4. The method for manufacturing a pillar sand mold according to claim 1, wherein the lower cavity bottom plate is provided with a lower slope, the upper cavity bottom plate is provided with an upper slope corresponding to the lower slope, and the upper slope and the lower slope are opposite in inclination direction and have the same inclination angle.
5. The method for manufacturing a pillar sand mold according to claim 4, wherein in the step (4), the slope of the upper mold formed at the upper slope is just engaged with the slope of the lower mold formed at the lower slope during the process of closing the upper mold and the lower mold.
6. The method of claim 1, wherein the pillar comprises a pillar body, the pillar body comprising a connecting surface extending vertically from a top surface to a bottom surface of the pillar body, the connecting surface separating the pillar body into a front cavity and a back cavity; the support seats are arranged below the upright post body, extend from the lower part of the bottom surface to two sides and are symmetrically distributed, so that a bottom groove is formed below the bottom surface;
a support reinforcing rib is arranged at the joint of the support and the side wall; the cross section of the support reinforcing rib is a right-angled triangle, and the hypotenuse of the right-angled triangle extends to the side edge of the support from the side wall.
7. The method for manufacturing a pillar sand mold according to claim 6, wherein the lower molding part comprises a reinforcing bar lower molding part for molding a lower seat reinforcing bar; the upper forming part comprises a reinforcing rib upper forming part for forming the reinforcing rib of the upper support.
8. The method for manufacturing the stand column sand mold according to claim 7, wherein a reinforcing rib groove is formed in the middle of the support reinforcing rib, and the reinforcing rib groove is formed downwards perpendicular to the upper surface of the support; a reinforcing rib groove lower forming part is arranged below the reinforcing rib lower forming part, and a reinforcing rib groove upper forming part is arranged below the reinforcing rib upper forming part; the manufacturing mold of the stand column sand mold further comprises a manufacturing mold for molding a core of the reinforcing rib groove.
9. The method for manufacturing a sand mold for a column according to claim 8, wherein the manufacturing mold is provided with a manufacturing mold cavity matched with a core for forming the reinforcing rib groove, and the manufacturing mold comprises a first manufacturing mold and a second manufacturing mold which are symmetrical with each other.
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| CN108044049B true CN108044049B (en) | 2020-08-04 |
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| CN206605242U (en) * | 2017-03-27 | 2017-11-03 | 惠州市艾普升数控机械有限公司 | A kind of column for vertical three axis numerically controlled machine |
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| GB1423301A (en) * | 1972-01-07 | 1976-02-04 | Sherwin Williams Co | Matchplate moulding machine |
| DE2721874A1 (en) * | 1977-05-14 | 1978-11-23 | Michael Achinger | Foundry moulding machine with two sand shooters - simultaneously filling cope and drag frames mounted on two turntables |
| CN1188696A (en) * | 1997-01-23 | 1998-07-29 | 鞍山钢铁集团公司 | Casting technology of thermal vibration sieve plate and the combined core used thereof |
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| CN108044049A (en) | 2018-05-18 |
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