Sand core forming mold and equipment

Abstract

The utility model discloses a sand core forming mould and equipment, which comprises an upper mould and a lower mould, the upper mould is provided with a plurality of first cavities, a plurality of sand blasting holes, a plurality of isolation grooves, a plurality of first air guide holes and a plurality of demoulding holes; the sand blasting holes penetrate through the upper mold, each first mold cavity is communicated with part of the sand blasting holes, an isolation groove is formed between any two adjacent first mold cavities, any two adjacent isolation grooves are connected, and the demolding holes penetrate through the upper mold and are formed around the peripheries of the first mold cavities; a plurality of second cavities and a plurality of separating walls are arranged on the lower mold, a separating wall is arranged between any two adjacent second cavities, any two adjacent separating walls are connected, a second air guide hole is formed in the joint of the two separating walls, and each air guide hole penetrates through the lower mold; when the upper die and the lower die are assembled, one first cavity and one second cavity are oppositely arranged to form a casting cavity, one separation wall is embedded in each separation groove to separate the adjacent casting cavities, and the upper die and the lower die are communicated through the multiple air guide holes.

Description

TECHNICAL FIELD

[0001] The utility model relates to the mould field, specifically, relate to a sand core forming mould and equipment. BACKGROUND

[0002] ‌When machining castings, some castings have many cavities, holes and other hollow shapes inside, which are all cast using sand cores. In addition to being used for casting, sand cores also support the cavities inside the castings to ensure the integrity of the internal structure of the castings. At the same time, sand cores have a positioning function, which can ensure the accuracy of the precision and size of the castings. In addition, during casting, the sand cores can provide space for ventilation holes to allow gas and impurities to be smoothly discharged, thereby ensuring the quality of the castings,

[0003] Sand cores are usually prepared using the hot-box method. The sand core raw material, which is a mixture of foundry sand, thermosetting resin and curing agent, is sprayed into a hot core box with a heating device. The sand core raw material is heated, so that the sand core raw material near the surface of the hot core box is heated. Under the action of high temperature, the thermosetting resin and curing agent, etc. can be condensed and hardened in a very short time, and form a sand core with the foundry sand.

[0004] However, when casting sand cores, the foundry sand has fluidity, and when the foundry sand is sprayed into the hot core box, the foundry sand will splash, causing the foundry sand in the cavity of the hot core box to be unable to fill the entire cavity, resulting in poor formation of the sand core cast in the cavity. In addition, some of the foundry sand may splash into other cavities, resulting in excessive raw material and failure to form. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a sand core forming mould and equipment,

[0006] The utility model aims to realize the following scheme:

[0007] A sand core forming mould, comprising: an upper mould and a lower mould, the upper mould is provided with a plurality of first cavities, a plurality of sand spraying holes, a plurality of isolation grooves, a plurality of first air guide holes and a plurality of demoulding holes; the plurality of sand spraying holes penetrate through the upper mould, each first cavity is communicated with part of the sand spraying holes, an isolation groove is arranged between any two adjacent first cavities, any two adjacent isolation grooves are connected, and the plurality of demoulding holes penetrate through the upper mould and are arranged around the periphery of the first cavity; the lower mould is provided with a plurality of second cavities and a plurality of isolation walls, an isolation wall is arranged between any two adjacent second cavities, any two adjacent isolation walls are connected, and a second air guide hole is arranged at the connection of the two isolation walls, and each air guide hole penetrates through the lower mould; wherein, when the upper mould and the lower mould are combined, a first cavity and a second cavity are opposite to form a casting cavity, an isolation wall is embedded in each isolation groove to separate adjacent casting cavities, and the plurality of air guide holes communicate between the upper mould and the lower mould.

[0008] In one embodiment, each first cavity comprises a first cavity body and a first protrusion surrounding the first cavity body, each first cavity is in communication with a part of the sandblasting holes, the first protrusion is provided with a plurality of first protrusions arranged in a circle and spaced apart, and a first fitting groove is arranged between two adjacent first protrusions; each second cavity comprises a fitting groove, a second cavity body, a second protrusion and a plug, the second cavity body and the second protrusion are arranged in the fitting groove, the second protrusion surrounds the periphery of the second cavity, the second protrusion is provided with a plurality of second protrusions arranged in a circle and spaced apart, a second fitting groove is arranged between two adjacent second protrusions, and the plug is arranged at the bottom of the second cavity; when the upper die and the lower die are combined, each first cavity is embedded in one of the second cavities, one first cavity and one second cavity are oppositely buckled to form a casting cavity, each first protrusion is embedded in one of the second fitting grooves, and each second protrusion is embedded in the first fitting groove.

[0009] In one embodiment, a sandblasting guide pipe is arranged in each sandblasting hole.

[0010] In one embodiment, one end of the sandblasting guide pipe is located outside the upper die, and the other end extends into the first cavity.

[0011] In one embodiment, the sandblasting hole is arranged along the periphery of the first cavity.

[0012] In one embodiment, the lower die is further provided with a plurality of air guide holes around the edge of the second cavity.

[0013] A sand core forming device comprises the sand core forming die, and further comprises a support and a lifting assembly; the support comprises a support body and a supporting frame; the supporting frame is arranged on the support body, the lifting assembly comprises a driving member, a lifting plate and a plurality of lifting rods, the driving member is arranged in the support body, the driving member is further connected to one side of the lifting plate, and the other side of the lifting plate is provided with the plurality of lifting rods; a plurality of guide holes are arranged in each second cavity, and each lifting rod is inserted into a guide hole.

[0014] In one embodiment, the plurality of guide holes are arranged around the outer edge of the plug.

[0015] In one embodiment, each guide hole is further provided with a sliding sleeve, and the lifting rod 53 extends into the sliding sleeve and can slide in the sliding sleeve.

[0016] Compared with the prior art, the sand core forming die has at least the following advantages:

[0017] The sand core forming die and equipment prevent the sand core raw materials in the casting cavities from splashing each other when filling the sand core raw materials in each casting cavity, and the sand core forming in the casting cavities is not uniform, or the sand core raw materials are too much to be formed. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application. In the drawings:

[0019] Figure 1 It is a perspective view of the sand core forming die in the embodiment;

[0020] Figure 2 It is Figure 1 the enlarged view of A in the figure;

[0021] Figure 3 It is Figure 1 the internal structure diagram of the upper die in the figure;

[0022] Figure 4 It is Figure 3 the enlarged structure diagram of the structure at B in the figure;

[0023] Figure 5 It is Figure 1 the sectional structure diagram in the figure;

[0024] Figure 6 It is Figure 5 the enlarged structure diagram of C in the figure;

[0025] Figure 7 It is Figure 1 the lower die structure diagram in the figure;

[0026] Figure 8 It is Figure 7 the enlarged structure diagram of D in the figure;

[0027] Figure 9 It is Figure 5 the enlarged structure diagram of E in the figure;

[0028] Figure 10 It is a perspective view of the sand core forming equipment;

[0029] Figure 11 It is a perspective view of the lower die part in the figure;

[0030] Figure 12 It is Figure 11 the enlarged structure diagram of F in the figure;

[0031] In the drawings, the reference signs are,

[0032] 1. upper die; 11. first cavity; 111. first cavity body; 112. first protrusion; 1121. first protruding strip; 11211. first fitting groove; 12. sand blasting hole; 121. sand blasting conduit; 13. isolation groove; 14. first air guide hole; 15. demolding hole

[0033] 2. lower die; 21. second cavity; 211. fitting groove; 212. second cavity body; 213. second protrusion; 2131. second protruding strip; 21311. second fitting groove; 214. plug; 215. guide hole; 2151. sliding sleeve

[0034] 22. isolation wall; 23. second air guide hole;

[0035] 3. casting cavity;

[0036] 4. support; 41. support body; 42. supporting frame;

[0037] 5. jacking assembly; 51. driving member; 52. jacking plate; 53. jacking rod. DETAILED DESCRIPTION

[0038] In the following, a plurality of embodiments of the present application will be disclosed with reference to the drawings. For the purpose of clear illustration, a plurality of practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0039] It should be noted that all directional references, such as upper, lower, left, right, front, rear, etc., are in relation to the specific orientation shown in the drawings and are used only to illustrate the relative position of the components in the specific orientation shown in the drawings. If the specific orientation shown in the drawings is changed, the directional references will also be changed accordingly.

[0040] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application. It is merely used to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0041] To further understand the utility model's content, features, and effects, the following embodiments are provided, along with detailed descriptions in conjunction with the accompanying drawings:

[0042] like Figure 1 As shown, Figure 1 This is a perspective view of a sand core forming mold according to the present invention, including: an upper mold 1 and a lower mold 2, as shown below. Figures 2-4 As shown, the upper mold 1 is provided with multiple first cavities 11, multiple sandblasting holes 12, multiple isolation grooves 13, multiple first air guide holes 14, and multiple demolding holes 15; as Figures 1-4 As shown, multiple sandblasting holes 12 penetrate the upper mold 1, and each first cavity 11 is connected to a portion of the sandblasting holes 12. An isolation groove 13 is provided between any two adjacent first cavities 11, and any two adjacent isolation grooves 13 are connected. Multiple demolding holes 15 penetrate the upper mold 1 and are arranged around the periphery of the first cavities 11. Figure 4 and 5 As shown, the lower mold 2 is provided with multiple second cavities 21 and multiple partition walls 22, and a partition wall 22 is provided between any two adjacent second cavities 21. Any two adjacent partition walls 22 are connected, and a vent hole 23 is provided at the connection of two partition walls 22. Each second vent hole 23 penetrates the lower mold 2; wherein, as shown... Figure 5 As shown, when the upper mold 1 and the lower mold 2 are closed, a first cavity 11 and a second cavity 21 are placed opposite each other to form a casting cavity 3. An isolation wall 22 is embedded in each isolation groove 13 to separate adjacent casting cavities 3. Multiple air guide holes 23 connect the upper mold 1 and the lower mold 2.

[0043] Among them, such as Figure 6 As shown, an isolation groove 13 is provided on the upper mold 1, and an isolation wall 22 is provided on the lower mold 2. The isolation groove 13 and the isolation wall 22 interlock, making the upper mold 1 and the lower mold 2 fit more tightly. At the same time, it can also separate each casting cavity 3, preventing the sand core material from splashing into other casting cavities 3 when the sand core material is injected into the mold. At the same time, a vent 23 is provided at the connection 22 of the two isolation walls to connect the upper mold 1 and the lower mold 2. Since the sand core forming requires the mold to be placed in a high-temperature environment for heating, the vent 23 can discharge the high-temperature steam between the upper mold 1 and the lower mold 2 to prevent it from affecting the sand core forming. It should be noted that the demolding hole 15 can be used to grip the upper mold 1. The demolding hole 15 can be used to remove the upper mold 1 by inserting a lifting device into the demolding hole 15.

[0044] Specifically, such as Figures 3-4As shown in FIG. 1, each first cavity 11 comprises a first cavity body 111 and a first protruding part 112 surrounding the first cavity body 111, each first cavity body 111 is in communication with a part of the sandblasting hole 12, and a plurality of first protruding ribs 1121 are arranged on the first protruding part 112 in a circle, and a first fitting groove 11211 is arranged between two adjacent first protruding ribs 1121. Figure 7 and 8 As shown in FIG. 2, each second cavity 21 comprises a fitting groove 211, a second cavity body 212, a second protruding part 213, and a sealing plug 214, the second cavity body 212 and the second protruding part 213 are arranged in the fitting groove 211, the second protruding part 213 surrounds the second cavity body 212, a plurality of second protruding ribs 2131 are arranged on the second protruding part 213 in a circle, a second fitting groove 21311 is arranged between two adjacent second protruding ribs 2131, and the sealing plug 214 is arranged at the bottom of the second cavity body 212. Figure 4 , Figure 8 and Figure 9 As shown in FIGS. 1 and 2, when the upper die 1 and the lower die 2 are combined, each first cavity 11 is embedded in one second cavity 21, a first cavity body 111 and a second cavity body 212 are oppositely buckled to form a casting cavity 3, each first protruding rib 1121 is embedded in one second fitting groove 21311, and each second protruding rib 2131 is embedded in a first fitting groove 11211. The first protruding part 112 surrounding the first cavity body 111 is provided with the first protruding rib 1121, and the first fitting groove 11211 is formed between two first protruding ribs 1121. The second protruding part 213 surrounding the second cavity body 212 is also provided with the second protruding rib 2131, and the second fitting groove 21311 is arranged between two adjacent second protruding ribs 2131. Through the staggered fitting between the first fitting groove 11211 and the second fitting groove 21311, the first cavity 11 can be more tightly fitted with the second cavity, and the sand core raw material is further prevented from splashing out of the casting cavity 3.

[0045] As a preferred embodiment, as shown in FIGS. 1 and 2, Figure 2 , Figure 4 and Figure 5 a sandblasting guide pipe 121 is arranged in each sandblasting hole 12. Since the sand core raw material has fluidity, directly injecting the sand core raw material into the sandblasting hole 12 can cause the sand core raw material to splash. The sand core raw material can be injected into the mold along the pipe wall of the sandblasting guide pipe 121.

[0046] Preferably, as shown in FIGS. 1 and 2, Figure 1 , Figure 2 and Figure 4As shown, one end of the sandblasting conduit 121 is located outside the upper mold 1, and the other end extends into the first cavity 111. Thus, when the mold is injected with the sand core material, the sand core material can be directly injected into the first cavity 11 from the sandblasting conduit 121 extending into the first cavity 11, preventing the ejection of the casting cavity 3 when the sand core material is injected.

[0047] Specifically, as shown in FIG. 1, the sandblasting hole 12 is arranged along the periphery of the first cavity 111. The sandblasting hole 12 is arranged along the periphery of the first cavity 111. It can be ensured that when the sandblasting hole 12 is injected with the sand core material, it is all dropped into the second cavity 21. Figure 1 2 Preferably, as shown in FIG. 1, the lower mold 2 also has a plurality of second air guide holes 23 around the edge of the second cavity 21. Since high-temperature steam is continuously generated during the heating process of the mold, the high-temperature steam gradually seeps out of the casting cavity 3. In order to further prevent the influence of high-temperature steam on the sand core forming process, a plurality of second air guide holes 23 are arranged around the edge of the second cavity of the lower mold 2 to discharge the high-temperature steam.

[0048] Specifically, as shown in FIG. 1, the sandblasting hole 12 is arranged along the periphery of the first cavity 111. The sandblasting hole 12 is arranged along the periphery of the first cavity 111. It can be ensured that when the sandblasting hole 12 is injected with the sand core material, it is all dropped into the second cavity 21. Figure 4 Preferably, as shown in FIG. 1, the lower mold 2 also has a plurality of second air guide holes 23 around the edge of the second cavity 21. Since high-temperature steam is continuously generated during the heating process of the mold, the high-temperature steam gradually seeps out of the casting cavity 3. In order to further prevent the influence of high-temperature steam on the sand core forming process, a plurality of second air guide holes 23 are arranged around the edge of the second cavity of the lower mold 2 to discharge the high-temperature steam.

[0049] Figure 10 A sand core forming device comprising the sand core forming mold described above, the sand core forming device further comprising a support 4 and a jacking assembly 5; the support 4 comprises a frame body 41 and a support frame 42; the support frame 42 is arranged on the frame body 41, and the jacking assembly 5 comprises a driving member 51, a jacking plate 52, and a plurality of jacking rods 53; the driving member 51 is arranged in the frame body 41, and the driving member 51 is further connected to one side of the jacking plate 52; the opposite side of the jacking plate 52 is provided with a plurality of jacking rods 53; each second cavity 21 is provided with a plurality of guide holes 215, and each jacking rod 53 is inserted into a guide hole 215.

[0050] The jacking assembly 5 can eject the formed sand core from the lower mold 2, so that manual removal is not required, preventing the staff from being scalded by high-temperature steam, and the lower mold provided with the guide holes 215 can accurately insert the jacking rods 53 into the lower mold 2, thereby playing a role in fixing the jacking rods 53.

[0051] Specifically, as shown in FIG. 1, the plurality of guide holes 215 are arranged around the outer edge of the sealing plug 214. The arrangement of the guide holes 215 around the edge of the sealing plug 214 can directly eject the formed sand core from the lower mold 2, and there is no need to open guide holes 215 at other positions of the lower mold 2, thereby reducing the number of openings and increasing the overall airtightness of the mold. Figure 8 Specifically, as shown in FIG. 1, the plurality of guide holes 215 are arranged around the outer edge of the sealing plug 214. The arrangement of the guide holes 215 around the edge of the sealing plug 214 can directly eject the formed sand core from the lower mold 2, and there is no need to open guide holes 215 at other positions of the lower mold 2, thereby reducing the number of openings and increasing the overall airtightness of the mold.

[0052] Figure 11 Figure 12 ​​​​As shown, the guide hole 215 is further provided with a sliding sleeve 2151, and the ejector rod 53 extends into the sliding sleeve 2151 and is slidable in the sliding sleeve 2151. In particular, when some sand core raw materials penetrate into the guide hole 215, the ejector rod 53 is not smoothly slidable in the guide hole 215, and the sliding sleeve 2151 is arranged to make the ejector rod 53 smoothly slidable in the guide hole 215.

[0053] In conclusion, the sand core forming mold and the equipment can make the upper mold and the lower mold more tightly buckled through the mutual embedding between the isolation groove 13 and the isolation wall 22, and separate each casting cavity 3, so that each casting cavity 3 does not affect each other, and the sand core raw materials cannot be splashed into other casting cavities when the sand core raw materials are injected, and the influence of external airflow on the sand core forming is reduced. Meanwhile, the first convex part 112 is provided with a plurality of first convex strips 1121, so that the first embedding groove 11211 is formed on the first convex part 112, and the first embedding groove 11211 and the second embedding groove 21311 in the second cavity are embedded with each other, so that the casting cavity 3 formed by the first cavity 11 and the second cavity 21 is more sealed, and the air guide hole 23 is arranged at the connecting part of the isolation wall 22, so that the high-temperature steam between the upper mold 1 and the lower mold 2 in the heating process can be discharged better.

[0054] The above is only an embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made in the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A sand core forming mold characterized by, The utility model relates to a sand blasting mould for casting, which comprises: An upper mould (1) and a lower mould (2), the upper mould (1) is provided with a plurality of first cavities (11), a plurality of sand blasting holes (12), a plurality of isolation grooves (13), a plurality of first air guide holes (14) and a plurality of demoulding holes (15); a plurality of sand blasting holes (12) penetrate through the upper mould (1), each first cavity (11) is communicated with part of the sand blasting holes (12), an isolation groove (13) is arranged between any two adjacent first cavities (11), any two adjacent isolation grooves (13) are connected, a plurality of demoulding holes (15) penetrate through the upper mould (1) and are arranged around the periphery of the first cavity (11); the lower mould (2) is provided with a plurality of second cavities (21) and a plurality of isolation walls (22), an isolation wall (22) is arranged between any two adjacent second cavities (21), any two adjacent isolation walls (22) are connected, a second air guide hole (23) is arranged at the connection of the two isolation walls (22), and each air guide hole (23) penetrates through the lower mould (2); wherein when the upper mould (1) and the lower mould (2) are combined, a first cavity (11) and a second cavity (21) are opposite to form a casting cavity (3), an isolation wall (22) is embedded in each isolation groove (13) to separate the adjacent casting cavities (3), and a plurality of air guide holes (23) are connected between the upper mould (1) and the lower mould (2).

2. The sand core forming mold according to claim 1, characterized by Each first cavity (11) comprises a first cavity body (111) and a first protruding part (112) arranged around the first cavity body (111), each first cavity body (111) is communicated with part of the sand blasting holes (12), a plurality of first protruding ribs (1121) are arranged on the first protruding part (112) at intervals in a circumferential direction, and a first embedding groove (11211) is arranged between adjacent two first protruding ribs (1121); each second cavity (21) comprises an embedding groove (211), a second cavity body (212), a second protruding part (213) and a sealing plug (214), the second cavity body (212) and the second protruding part (213) are arranged in the embedding groove (211), the second protruding part (213) is arranged around the second cavity body (212), a plurality of second protruding ribs (2131) are arranged on the second protruding part (213) at intervals in a circumferential direction, a second embedding groove (21311) is arranged between adjacent two second protruding ribs (2131), and the sealing plug (214) is arranged at the bottom of the second cavity body (212); wherein when the upper mould (1) and the lower mould (2) are combined, each first cavity (11) is embedded in one of the second cavities (21), a first cavity body (111) and a second cavity body (212) are opposite to each other and are buckled to form a casting cavity (3), each first protruding rib (1121) is embedded in one of the second embedding grooves (21311), and each second protruding rib (2131) is embedded in the first embedding groove (11211).

3. The sand core forming mold according to claim 1, characterized by A sand blasting guide pipe (121) is arranged in each sand blasting hole (12).

4. The sand core forming mold according to claim 3, characterized in that, One end of the sandblasting conduit (121) is located outside the upper mold (1), and the other end extends into the first cavity (111).

5. The sand core forming mold of claim 2, wherein, The sandblasting hole (12) is arranged along the periphery of the first cavity (111).

6. The sand core forming mold of claim 2, wherein, The lower mold (2) is also provided with a plurality of air guide holes (23) around the edge of the second cavity (21).

7. A sand core forming apparatus characterized by, The sand core forming mold comprises a support (4) and a jacking assembly (5), the support (4) comprises a frame body (41) and a support frame (42), the support frame (42) is arranged on the frame body (41), the jacking assembly (5) comprises a driving member (51), a jacking plate (52) and a plurality of jacking rods (53), the driving member (51) is arranged in the frame body (41), the driving member (51) is also connected to one side of the jacking plate (52), and the jacking plate (52) is provided with a plurality of jacking rods (53) on the opposite side.

8. A core forming apparatus as claimed in claim 7, wherein The plurality of guide holes (215) are arranged around the outer edge of the sealing plug (214).

9. A core forming apparatus as claimed in claim 7, wherein Each guide hole (215) is also provided with a sliding sleeve (2151), and the jacking rod (53) extends into the sliding sleeve (2151) and can slide in the sliding sleeve (2151).

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