A casting mold fixing device and method

Abstract

The application discloses a casting mold fixing device and method, and belongs to the casting technical field, which comprises a mold body provided with a first matching part and a fixing assembly; the fixing assembly comprises a fixing pin rod and a sand hanging rod, one end of the fixing pin rod is provided with a second matching part; one end of the sand hanging rod is provided with a fixing pin sleeve through which the fixing pin rod passes, and the axis of the sand hanging rod intersects with the axis of the fixing pin rod; the second matching part at one end of the fixing pin rod in the fixing assembly is matched with the first matching part on the mold body, so that the fixing assembly is fixed on the mold body; after sand flow molding, the fixing assembly is completely in the lower sand mold; under the action of the intersected fixing pin rod and the sand hanging rod, the mold body can be stably connected with the lower sand mold; when the lower sand box is overturned, the problems such as mold displacement and falling off do not occur, the quality of the lower sand mold after mold lifting is guaranteed, the surface quality of the castings is guaranteed, the operation is simple, the fixing assembly can be recycled after the box is knocked, and the service life is long.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of casting technology, in particular to a casting mold fixing device and method. BACKGROUND

[0002] Sand molding is a key process of sand casting, specifically, the prepared sand is filled into the sand box, then the sand is turned over and the model is taken out, and finally the hollow cavity that can accommodate molten metal is obtained, and sand turning describes the process very vividly.

[0003] At present, sand casting separates the mold at the parting of the upper sand mold and the lower sand mold, specifically, the mold is placed on the ground, the lower sand box is placed upside down on the mold, the bottom of the lower sand box is upward at this time, the sand is sent into the lower sand box for sand molding, and the lower sand mold is formed, after the lower sand mold is solidified, the lower sand box is turned over together with the mold, and then the molding of the upper sand box is performed, however, during the process of turning over the lower sand box together with the mold, since there is no fixing structure between the mold and the lower sand mold, the mold is prone to displacement and falling off, resulting in unqualified sand casting quality.

[0004] Therefore, it is an urgent problem to be solved to develop and design a casting mold fixing device and method which can effectively prevent the mold from displacement and falling off during the turning process, is simple to operate, can be recycled and used repeatedly, and ensures the surface quality of the casting. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a casting mold fixing device and method, the second matching part at one end of the fixing pin rod in the fixing assembly matches the first matching part on the mold body, so that the fixing assembly is fixed to the mold body, after sand molding, the fixing assembly is completely in the lower sand mold, under the action of the cross arranged fixing pin rod and the sand hanging rod, the mold body and the lower sand mold can be stably connected, during turning over the lower sand box, the mold is not prone to displacement and falling off, the quality of the lower sand mold after demolding is qualified, and the surface quality of the casting is ensured, the operation is simple, the fixing assembly can be recycled and used repeatedly after turning, and the service life is long.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] On the one hand, the present application provides a casting mold fixing device, comprising:

[0008] a mold body, a first matching part is arranged on the side surface of the mold body;

[0009] The fixed assembly comprises a fixed pin rod and a sand hanging rod, one end of the fixed pin rod is provided with a second matching part matched with the first matching part, and the second matching part is detachably connected with the first matching part; one end of the sand hanging rod is provided with a fixed pin sleeve, the fixed pin rod passes through the fixed pin sleeve, the axis of the sand hanging rod intersects with the axis of the fixed pin rod, and the other end of the sand hanging rod does not exceed the upper surface of the mold body; the fixed pin sleeve and the mold body have a spacing.

[0010] As a preferred technical solution, the first matching part is provided as a first internal thread, and the second matching part is provided as a first external thread matched with the first internal thread.

[0011] As a preferred technical solution, the mold body comprises a main body and a fixed block, the main body is fixedly connected with the fixed block, and the first internal thread is arranged on the fixed block.

[0012] As a preferred technical solution, a third matching part is arranged on the fixed pin sleeve, one end of the sand hanging rod is provided with a fourth matching part matched with the third matching part, and the fourth matching part is detachably connected with the third matching part.

[0013] As a preferred technical solution, the third matching part is provided as a sleeve fixedly connected with the fixed pin sleeve, the sleeve has a second internal thread, and the fourth matching part is provided as a second external thread matched with the second internal thread.

[0014] As a preferred technical solution, a protective sleeve is arranged on the sand hanging rod, and after the sand hanging rod is threadedly connected with the sleeve, one end of the sleeve away from the fixed pin sleeve extends into the protective sleeve.

[0015] As a preferred technical solution, the axis of the sand hanging rod is perpendicular to the axis of the fixed pin rod.

[0016] And / or, one end of the fixed pin rod away from the second matching part is arranged in a bent manner.

[0017] And / or, one end of the sand hanging rod away from the fixed pin sleeve is provided with a handle.

[0018] And / or, the distance between the fixed pin sleeve and the mold body is 15-30 mm.

[0019] In a second aspect, the present application provides a casting mold fixing method applied to the casting mold fixing device, comprising the following steps:

[0020] S1: the mold body is placed upside down on a horizontal plane, the fixed assembly is connected with the mold body, and a reserved block is placed on the side of the fixed assembly away from the mold body;

[0021] S2: the lower sand box is placed upside down on a horizontal plane, the mold body, the fixed assembly and the reserved block are located in the lower sand box, sand is poured in the lower sand box to form a lower sand mold;

[0022] S3: the lower sand box is turned over by 180°, and the mold body is fixed in the lower sand mold and turned over with the lower sand box;

[0023] S4: the upper sand box is placed above the lower sand box and sand is poured to form an upper sand mold, and then the upper sand box is lifted;

[0024] S5: the reserved block is taken out, the second matching part on the fixed pin rod is detached from the first matching part on the mold body, and the fixed pin rod is retreated into the cavity formed by the reserved block;

[0025] S6: the mold body is taken out;

[0026] S7: the space formed by the retreat of the fixed pin rod in the lower sand mold and the interval between the mold body and the fixed pin sleeve are filled and sealed;

[0027] S8: the upper sand box is combined with the lower sand box, and the casting process can be carried out.

[0028] As a preferred technical solution, the material of the reserved block is foam;

[0029] And / or, the length of the reserved block in the horizontal direction is greater than the sum of the length of the fixed pin rod extending into the mold body and the distance between the fixed pin sleeve and the mold body.

[0030] As a preferred technical solution, in step S3, the turning direction of the lower sand box is vertical;

[0031] And / or, in step S7, the material for filling and sealing is resin sand;

[0032] And / or, in step S7, the space formed after the reserved block is taken out in the lower sand mold is also filled and sealed;

[0033] And / or, in step S8, the upper sand box is combined with the lower sand box by hoisting.

[0034] The beneficial effects of the present application are:

[0035] 1. The casting mold fixing device of the present invention fixes the fixing component to the mold body. Specifically, the second mating part at one end of the fixing pin in the fixing component is detachably mated with the first mating part on the mold body. After sand casting, the fixing component is completely submerged in the lower sand mold. Under the action of the cross-arranged fixing pin and sand hanging rod, the mold body and the lower sand mold can be stably positioned relative to each other. During "sand turning", the mold body and the lower sand mold are stably turned with the lower sand box, and there will be no problem of the mold shifting or falling off relative to the lower sand mold. This ensures that the quality of the lower sand mold after demolding is qualified, so that the surface quality of the castings cast using the lower sand mold meets the requirements. The operation is simple. In addition, since there is a gap between the mold body and the fixing pin, after filling the gap, the fixing component does not come into contact with the molten metal during the casting process, isolating the casting from the fixing component and avoiding affecting the quality of the casting. At the same time, it protects the fixing component. After the mold box is opened, the fixing component can be recycled and reused multiple times, and has a long service life.

[0036] 2. The casting mold fixing device of the present invention needs to be provided with a first mating part on the mold body. In actual production, the first mating part can be processed at a suitable surface on the mold body. The first mating part can also be designed according to the specific structure of the mold body. While ensuring the connection and fixing strength between the fixing component and the mold body, the surface quality of the lower sand mold corresponding to the first mating part is also guaranteed.

[0037] 3. In the casting mold fixing method of the present invention, after the mold is removed, the space formed by the retraction of the fixing pin in the lower sand mold is filled and sealed, so that the shape of the lower sand mold cavity is consistent with the mold, ensuring the surface quality of the casting, while avoiding direct contact between the second mating part at one end of the fixing pin and the poured molten iron, thus preventing damage to the fixing component. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of a casting mold fixing device according to the present invention;

[0039] Figure 2 for Figure 1 Structural diagram before installation;

[0040] Figure 3 for Figure 2 A three-dimensional view of the fixed components in the diagram;

[0041] Figure 4 This is a schematic diagram of steps 1 and 2 in a casting mold fixing method of the present invention;

[0042] Figure 5 This is a schematic diagram of step 3 in a casting mold fixing method of the present invention;

[0043] Figure 6 This is a schematic diagram of step 4 in a casting mold fixing method of the present invention;

[0044] Figure 7 This is a schematic diagram of step 5 in a casting mold fixing method of the present invention;

[0045] Figure 8 This is a schematic diagram of step 6 in a casting mold fixing method of the present invention;

[0046] Figure 9 This is a schematic diagram of step 7 in a casting mold fixing method of the present invention.

[0047] In the diagram: 1-Mold body, 11-First mating part, 12-Main body, 13-Fixing block, 2-Fixing pin, 21-Second mating part, 3-Sand hanging rod, 31-Fourth mating part, 32-Handle, 4-Fixing pin sleeve, 41-Sleeve, 42-Third mating part, 5-Protective sleeve, 6-Reserved block, 7-Lower sand mold, 71-Lower sand box, 8-Upper sand mold, 81-Upper sand box. Detailed Implementation

[0048] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0049] Please refer to Figures 1-9 This invention provides an embodiment of a casting mold fixing device, comprising a mold body 1 and a fixing assembly. The fixing assembly includes a fixing pin 2 and a sand-hanging rod 3. A first mating part 11 is provided on the side of the mold body 1, and a second mating part 21 matching the first mating part 11 is provided at one end of the fixing pin 2. The second mating part 21 and the first mating part 11 are detachably connected. When the second mating part 21 and the first mating part 11 are connected and mated, the fixing assembly can be fixedly connected to the mold body 1. Before demolding, the second mating part 21 is separated from the first mating part 11, so as not to interfere with the removal of the mold body 1 from the lower sand mold 7.

[0050] Further, one end of the sand hanging rod 3 is provided with a fixed pin sleeve 4, the fixed pin rod 2 passes through the fixed pin sleeve 4, and the two are gap-fitted. On the one hand, when the fixed assembly is assembled, the sand hanging rod 3 and the fixed pin rod 2 can be conveniently connected and the relative position of the two can be adjusted. When the fixed pin rod 2 is fixed, the sand hanging rod 3 does not need to rotate with it. On the second aspect, when the fixed pin rod 2 is removed from the mold body 1, the sand hanging rod 3 and the fixed pin sleeve 4 will not interfere. The axis of the sand hanging rod 3 intersects the axis of the fixed pin rod 2. The sand hanging rod 3 and the fixed pin rod 2 have better contact area with the sanding mold 7 and can bear force in multiple directions to ensure stable fixation in the sanding mold 7. The other end of the sand hanging rod 3 does not exceed the upper surface of the mold body 1, that is, the highest point of the fixed assembly is lower than the upper surface of the mold body 1, so as to avoid affecting the sand molding. There is a gap between the fixed pin sleeve 4 and the mold body 1. On the one hand, after sand molding, the fixed pin sleeve 4 remains in the sanding mold 7. The gap can ensure that the end face of the fixed pin sleeve 4 can be effectively filled and sealed, so as to avoid contact with the metal liquid during casting and affect the casting quality of the casting at this position. On the second aspect, after sand molding, the fixed pin sleeve 4 and the sand hanging rod 3 are filled with sand between the mold body 1, so as to avoid the metal liquid poured directly contacting and damaging the sand hanging rod 3, and thus the fixed assembly as a whole can be recycled and used.

[0051] Further, please refer to Figures 1-9 , the axis of the sand hanging rod 3 is preferably perpendicular to the axis of the fixed pin rod 2, which can maximize the fixing effect of the fixed assembly in the sanding mold 7. In other embodiments, the angle between the axis of the sand hanging rod 3 and the axis of the fixed pin rod 2 can also be other angles, as long as it can be stably fixed in the sanding mold 7.

[0052] Specifically, in order to ensure the fixing effect between the fixed assembly and the sanding mold 7, and at the same time, the fixed pin sleeve 4 can be conveniently filled and sealed in the cavity of the sanding mold 7, the distance between the end face of the fixed pin sleeve 4 close to the mold body 1 and the mold body 1 is preferably 15-30mm.

[0053] Need to be explained, please refer to Figure 1 and Figure 2 , the mold body 1 preferably comprises a main body 12 and a fixed block 13, the main body 12 and the fixed block 13 jointly form the shape of the mold body 1, the main body 12 and the fixed block 13 are fixedly connected by wood screws, the first internal thread is arranged on the fixed block 13, and when the first internal thread is damaged, only the fixed block 13 needs to be replaced, which is convenient for processing and production. In other embodiments, the mold body 1 can also be an integral molding structure, and the first matching part 11 is directly machined on the mold body 1, so as to realize casting molding.

[0054] In this embodiment, please refer to Figures 1-3, the first fitting part 11 is provided with a first internal thread, the second fitting part 21 is provided with a first external thread matched with the first internal thread, and the second fitting part 21 is detachably connected with the first fitting part 11 through the threaded connection; in other embodiments, the detachable connection structure between the second fitting part 21 and the first fitting part 11 can also be a key connection, a spline connection, a pin connection or a buckle connection, so as to stably fix the mold body 1 and the fixing assembly in position when matched and can be conveniently disassembled.

[0055] Further, please refer to Figures 1-9 , the end of the fixing pin rod 2 away from the second fitting part 21 is bent, and when the fixing pin rod 2 needs to be disassembled from the mold body 1, the fixing pin rod 2 can be conveniently rotated.

[0056] In this embodiment, please refer to Figures 1-3 , the fixing pin sleeve 4 is provided with a third fitting part 42, and one end of the sand hanging rod 3 is provided with a fourth fitting part 31 matched with the third fitting part 42, the fourth fitting part 31 is detachably connected with the third fitting part 42, and the sand hanging rod 3 and the fixing pin sleeve 4 can be conveniently disassembled and assembled.

[0057] Specifically, please refer to Figures 1-3 , the third fitting part 42 is provided with a sleeve 41 welded with the fixing pin sleeve 4, the sleeve 41 is provided with a second internal thread, and the fourth fitting part 31 is provided with a second external thread matched with the second internal thread, and the fourth fitting part 31 is detachably connected with the third fitting part 42 through the threaded connection; in other embodiments, the detachable connection structure between the fourth fitting part 31 and the third fitting part 42 can also be a key connection, a spline connection, a pin connection or a buckle connection, so as to conveniently and quickly connect and disassemble the sand hanging rod 3 and the fixing pin sleeve 4.

[0058] Further, please refer to Figures 1-3 , one end of the sand hanging rod 3 away from the fixing pin sleeve 4 can be provided with a handle 32, which can be more convenient to rotate the sand hanging rod 3 to realize the threaded connection of the sand hanging rod 3 and the sleeve 41, and can also improve the stability in the sand removal mold 7.

[0059] Further, please refer to Figures 1-9 , the sand hanging rod 3 is welded with a protective sleeve 5, when the sand hanging rod 3 is threadedly connected with the sleeve 41, the end of the sleeve 41 away from the fixing pin sleeve 4 extends into the protective sleeve 5, and when the sand is poured, the protective sleeve 5 can effectively prevent the sand from entering the gap between the sand hanging rod 3 and the sleeve 41, avoid affecting the thread when the sand hanging rod 3 is rotated out, and improve the service life.

[0060] Secondly, please refer to Figures 4-9The application provides a casting mold fixing method applied to the casting mold fixing device, and comprises the following steps:

[0061] S1: the mold body 1 is placed upside down on a horizontal plane, the fixing assembly is connected with the mold body 1, a reserved block 6 is placed on the side of the fixing assembly away from the mold body 1, and the space at the reserved block 6 is a retreat space for the fixed pin rod 2 after sand molding; specifically, the length of the reserved block 6 in the horizontal direction should be greater than the sum of the distance that the fixed pin rod 2 is screwed into the first internal thread and the distance between the fixed pin sleeve 4 and the mold body 1, so that the fixed pin rod 2 can retreat by a sufficient distance, the resin sand for filling and plugging has a sufficient thickness, and the fixed pin rod 2 is prevented from being adhered after contacting the metal liquid; the material of the reserved block 6 is preferably foam;

[0062] S2: the lower sand box 71 is placed upside down on the horizontal plane, the mold body 1, the fixing assembly and the reserved block 6 are all located in the lower sand box 71, and sand is molded;

[0063] S3: the lower sand box 71 is vertically flipped by 180°, the mold body 1 is fixed in the lower sand mold 7 and flipped with the lower sand box 71;

[0064] S4: the upper sand box 81 is placed above the lower sand box 71 and sand is molded, so that the upper sand mold 8 is formed, and then the upper sand box 81 is lifted;

[0065] S5: the reserved block 6 is taken out, the second matching part 21 on the fixed pin rod 2 is detached from the first matching part 11 on the mold body 1, and the fixed pin rod 2 is retreated into the cavity formed by the reserved block 6;

[0066] S6: the mold body 1 is taken out;

[0067] S7: the space formed by the retreat of the fixed pin rod 2 in the lower sand mold 7 and the interval between the mold body 1 and the fixed pin sleeve 4 are filled and plugged by using resin sand; meanwhile, the space formed by taking out the reserved block 6 in the lower sand mold 7 can also be filled and plugged by using resin sand;

[0068] S8: the upper sand box 81 and the lower sand box 71 are combined, and the casting process can be performed.

[0069] It should be noted that the vertical direction during the overall flipping of the lower sand box 71 refers to the distribution direction of the mold body 1, the fixing assembly and the reserved block 6; and in actual production, the size and style of the fixed pin rod 2 and the sand hanging rod 3 can be flexibly designed according to the size of the mold body 1, for example, when the mold body 1 is high, the length of the fixed pin rod 2 and the sand hanging rod 3 can be increased, and when the weight of the mold body 1 is large, the outer end of the fixed pin rod 2 and the sand hanging rod 3 can be designed as a cross shape, so that the sand hanging capacity is further improved.

[0070] In the sand casting process, the molding bottom plate is not needed, the mold body 1 is stably positioned with the lower sand mold 7, in the "sand turning", the mold body 1 and the lower sand mold 7 are stably followed with the lower sand box 71 to turn over, the problem that the mold body 1 is displaced and falls off relative to the lower sand mold 7 does not appear, and then the quality of the lower sand mold 7 after the mold is lifted is guaranteed.

[0071] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A casting mold fixing device characterized by comprising: The application relates to a casting mold fixing device. The mold body (1) is provided with a first matching part (11) on the side surface; the fixing assembly comprises a fixing pin rod (2) and a sand hanging rod (3); one end of the fixing pin rod (2) is provided with a second matching part (21) matched with the first matching part (11); the second matching part (21) and the first matching part (11) are detachably connected; one end of the sand hanging rod (3) is provided with a fixing pin sleeve (4); the fixing pin rod (2) penetrates through the fixing pin sleeve (4); the axis of the sand hanging rod (3) intersects with the axis of the fixing pin rod (2); the other end of the sand hanging rod (3) does not exceed the upper surface of the mold body (1); the fixing pin sleeve (4) is spaced apart from the mold body (1); The first matching part (11) is provided with a first internal thread; the second matching part (21) is provided with a first external thread matched with the first internal thread; the mold body (1) comprises a main body (12) and a fixing block (13); the main body (12) is fixedly connected with the fixing block (13); the first internal thread is arranged on the fixing block (13); A reserved block (6) is arranged on the side, away from the mold body (1), of the fixing assembly; the space at the reserved block (6) is a retreat space of the fixing pin rod (2) after sand casting. The fixing pin sleeve (4) is provided with a third matching part (42); one end of the sand hanging rod (3) is provided with a fourth matching part (31) matched with the third matching part (42); the fourth matching part (31) and the third matching part (42) are detachably connected.

2. A casting mold fixing device according to claim 1, characterized in that, The third matching part (42) is provided with a sleeve (41) fixedly connected with the fixing pin sleeve (4); the sleeve (41) is provided with a second internal thread; the fourth matching part (31) is provided with a second external thread matched with the second internal thread.

3. A casting mold fixing device according to claim 2, characterized in that The sand hanging rod (3) is provided with a protective sleeve (5); when the sand hanging rod (3) is threadedly connected with the sleeve (41), the end, away from the fixing pin sleeve (4), of the sleeve (41) extends into the protective sleeve (5).

4. A casting mold fixing device according to claim 3, characterized in that The axis of the sand hanging rod (3) is perpendicular to the axis of the fixing pin rod (2); 5. A casting mold fixing device according to claim 1, wherein And / or, the end, away from the second matching part (21), of the fixing pin rod (2) is arranged in a bent mode; And / or, the end, away from the fixing pin sleeve (4), of the sand hanging rod (3) is provided with a handle (32); And / or, the distance between the fixing pin sleeve (4) and the mold body (1) is 15-30 mm. The application is applied to the casting mold fixing device in any one of claims 1-5 and comprises the following steps:

6. A casting mold fixing method characterized by comprising: S1: placing the mold body (1) upside down on a horizontal surface, connecting the fixing assembly with the mold body (1) and placing the reserved block (6) on the side, away from the mold body (1), of the fixing assembly. ​ S2: Turn the lower sand box (71) upside down on the horizontal plane, the mold body (1), the fixed assembly and the reserved block (6) are located in the lower sand box (71), and the sand is flowed in the lower sand box (71) to form a lower sand mold (7); S3: Turn the lower sand box (71) by 180° as a whole, and the mold body (1) is fixed in the lower sand mold (7) and turns over with the lower sand box (71); S4: Place the upper sand box (81) above the lower sand box (71) and flow sand to form an upper sand mold (8), and then lift the upper sand box (81); S5: Take out the reserved block (6), disassemble the second matching part (21) on the fixed pin rod (2) from the first matching part (11) on the mold body (1), and retreat the fixed pin rod (2) into the cavity formed by the reserved block (6); S6: Lift the mold, and take out the mold body (1); S7: Fill and seal the space formed by the retreat of the fixed pin rod (2) in the lower sand mold (7), and the interval between the mold body (1) and the fixed pin sleeve (4); S8: Combine the upper sand box (81) and the lower sand box (71), and then perform the casting process.

7. A method of securing a casting mold according to claim 6, wherein The material of the reserved block (6) is foam; And / or, the length of the reserved block (6) in the horizontal direction is greater than the sum of the length of the fixed pin rod (2) extending into the mold body (1) and the distance between the fixed pin sleeve (4) and the mold body (1).

8. The casting mold fixing method according to claim 6, wherein In step S3, the turning direction of the lower sand box (71) is vertical; And / or, in step S7, the filling and sealing material is resin sand; And / or, in step S7, the space formed after taking out the reserved block (6) in the lower sand mold (7) is also filled and sealed; And / or, in step S8, the upper sand box (81) is combined with the lower sand box (71) by hoisting.

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