Integrally-formed sand core mold for double-layer water jacket

Abstract

The utility model discloses an integrally-formed sand core mold for a double-layer water jacket. An upper mold is provided with an upper central groove, an upper sliding block groove, a plurality of insert grooves and a plurality of sand inlet holes; the lower die is provided with a lower central groove, a lower sliding block groove and at least one pulling block groove; a gap among the upper central groove, the insert, the loose core and the sliding block forms an upper water jacket sand core forming cavity; the inner side end of the pulling block is used for penetrating through the insert and being inserted into the lower center groove, and the inner side end of the sliding block is used for stretching into the upper center groove and the lower center groove and abutting against the pulling core and the pulling block. A gap among the lower central groove, the pulling block and the sliding block forms a lower water jacket sand core forming cavity; the bottom of the upper water jacket sand core forming cavity is communicated with the top of the lower water jacket sand core forming cavity; the lower ends of the sand inlet holes communicate with the upper sand core forming cavity, the upper ends of the sand inlet holes upwards penetrate through the upper mold, and the multiple sand inlet holes are distributed at intervals. The upper water jacket sand core and the lower water jacket sand core can be integrally formed, the casting qualification rate of the cylinder cover of the air cylinder can be improved, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sand core mould technical field especially relates to a sand core mould of integrally forming for double -layer water jacket. BACKGROUND

[0002] The cylinder of the continuously operated automobile engine can produce a large amount of heat, and the temperature of the cylinder body is continuously increased. In order to avoid the aging and damage of related components caused by the excessively high temperature of the cylinder body, the water flow channel including the upper water jacket and the lower water jacket is arranged in the cylinder head of the prior art, so as to reduce the temperature of the cylinder body by circulating cooling water.

[0003] When the cylinder head of the prior art is side-cast, the upper water jacket sand core and the lower water jacket sand core are respectively placed in the casting mold of the cylinder head, and the upper water jacket sand core and the lower water jacket sand core are abutted together. After the cylinder head is cast, the upper water jacket sand core and the lower water jacket sand core are damaged, and the sand particles in the upper water jacket sand core and the lower water jacket sand core are discharged from the cylinder head, and then the endoscope is used to inspect whether the upper water jacket and the lower water jacket in the cylinder head are completed.

[0004] Since the upper water jacket sand core and the lower water jacket sand core are abutted together during casting, if vibration occurs during the casting process, the upper water jacket sand core and the lower water jacket sand core may be displaced and deviated, thereby causing the penetration rate of the upper water jacket and the lower water jacket in the formed cylinder head to be low, and further affecting the casting yield and manufacturing cost of the cylinder head. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model aims to provide a sand core mould of integrally forming for double -layer water jacket, which solves the problem of low penetration rate of the upper water jacket and the lower water jacket in the cast cylinder head.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A sand core mould of integrally forming for double -layer water jacket, comprising upper die connecting plate, upper die, lower die and lower die connecting plate arranged in sequence from top to bottom, the upper die is installed on the upper die frame through the upper die connecting plate, and the lower die is installed on the lower die frame through the lower die connecting plate;

[0008] The upper die is provided with an upper center groove, an upper sliding block groove, a plurality of insert block grooves and a plurality of sand inlet holes; the lower die is provided with a lower center groove, a lower sliding block groove and at least one extraction block groove;

[0009] The upper center recess, the upper slider groove and the several insert grooves are respectively concave upwardly on the bottom surface of the upper mold, and the upper slider groove and the several insert grooves are arranged around the periphery of the upper center recess; the lower center recess, the lower slider groove and the draw block groove are respectively concave downwardly on the top surface of the lower mold, and the lower slider groove and the draw block groove are respectively arranged close to the lower center recess; the upper slider groove and the lower slider groove are opposite to each other and form a slider cavity; the inner side ends of the upper slider groove, the insert groove, the lower slider groove and the draw block groove, and the upper center recess and the lower center recess are communicated with each other, and the outer side ends of the upper slider groove and the insert groove respectively extend along the horizontal direction and penetrate through the upper mold; the outer side ends of the lower slider groove and the draw block groove respectively extend along the horizontal direction and penetrate through the lower mold;

[0010] The insert groove is installed with an insert, the slider cavity is installed with a slider, and the draw block groove is installed with a draw block; the insert, the slider and the draw block are respectively telescopic along the horizontal direction; the inner side end face of the insert is connected with the groove wall face of the upper center recess, and the inner side end of the insert is used to penetrate through the insert and insert into the upper center recess; the gap among the upper center recess, the insert, the draw core and the slider constitutes an upper water jacket sand core forming cavity; the inner side end of the draw block is used to penetrate through the insert and insert into the lower center recess, and the inner side end of the slider is used to extend into the upper center recess and the lower center recess and abut against the insert and the draw block; the gap among the lower center recess, the draw block and the slider constitutes a lower water jacket sand core forming cavity; the bottom of the upper water jacket sand core forming cavity is communicated with the top of the lower water jacket sand core forming cavity;

[0011] The lower end of the sand inlet hole is communicated with the upper water jacket sand core forming cavity, and the upper end of the sand inlet hole penetrates through the upper mold upwardly, and the several sand inlet holes are arranged at intervals.

[0012] Further, the sand shooting plate and the upper top plate are further included;

[0013] The sand shooting plate and the upper top plate are respectively installed above the upper mold and can move horizontally and can be lifted and lowered; the upper mold connecting plate is provided with a plurality of first through holes;

[0014] The first through holes penetrate through the upper mold connecting plate from top to bottom, and the plurality of first through holes are arranged one by one corresponding to the plurality of sand inlet holes;

[0015] The sand shooting plate is provided with a plurality of sand shooting pipes which are arranged one-to-one with the sand inlet holes; the lower ends of the sand shooting pipes penetrate the sand shooting plate downward, and are used to pass through the first through holes and insert into the corresponding sand inlet holes; the upper ends of the sand shooting pipes are used to input the sand wax for filling the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity;

[0016] The upper top plate is provided with a plurality of upper ejector pins which are arranged one-to-one with the sand inlet holes;

[0017] The upper ends of the upper ejector pins are fixed to the upper top plate; the lower ends of the upper ejector pins extend downward and are used to insert into the corresponding sand inlet holes to eject the solidified sand core in the upper water jacket sand core forming cavity.

[0018] Further, the lower top plate is further provided;

[0019] The lower top plate is installed below the lower mold in a lifting manner;

[0020] The lower mold connecting plate is provided with a plurality of second through holes which penetrate the lower mold connecting plate from bottom to top;

[0021] The lower mold is provided with a plurality of lower ejector pin holes, the upper ends of the lower ejector pin holes are communicated with the lower water jacket sand core forming cavity, the lower ends of the lower ejector pin holes penetrate the lower mold downward, and the lower ejector pin holes are distributed at intervals;

[0022] The lower top plate is provided with a plurality of lower ejector pins which are arranged one-to-one with the lower ejector pin holes, the lower ends of the lower ejector pins are fixed to the lower top plate, and the upper ends of the lower ejector pins are used to pass through the second through holes and insert into the corresponding lower ejector pin holes upward.

[0023] Further, the first telescopic cylinders are further provided;

[0024] The first telescopic cylinders are arranged on the bottom surface of the upper mold connecting plate close to the outer circumferential surface of the upper mold; the output ends of the first telescopic cylinders are connected with the outer side ends of the core pullers.

[0025] Further, the second telescopic cylinders are further provided;

[0026] The second telescopic cylinders are arranged on the top surface of the lower mold connecting plate close to the outer circumferential surface of the lower mold; the output ends of the second telescopic cylinders are connected with the outer side ends of the sliders or the pullers.

[0027] Further, the bottom surface of the upper center groove is provided with a first protruding block downward;

[0028] The edge of the first protrusion and the groove wall of the upper center groove are left with a gap, and the bottom surface of the first protrusion is used to abut against the top surface of the core-pulling block or the slider.

[0029] Further, the groove bottom surface of the lower center groove is provided with a plurality of second protrusions upwardly protruding;

[0030] The plurality of second protrusions are left with a gap, and the edge of each second protrusion and the groove wall of the lower center groove are also left with a gap, and the top surface of the second protrusion is used to abut against the top surface of the core-pulling block or the slider.

[0031] Further, the lower mold is also provided with a first extension groove and a second extension groove;

[0032] The first extension groove and the second extension groove are respectively recessed downwardly on the top surface of the lower mold, and the first extension groove and the second extension groove are respectively close to and communicated with the lower center groove;

[0033] The groove bottom surface of the first extension groove and the second extension groove is provided with at least one lower ejector pin hole;

[0034] The upper mold is provided with a third extension groove and a fourth extension groove, the third extension groove and the fourth extension groove are respectively recessed upwardly on the bottom surface of the upper mold, the third extension groove is opposite to and communicated with the first extension groove, and the fourth extension groove is opposite to and communicated with the second extension groove; and the third extension groove and the fourth extension groove are respectively communicated with the lower end of at least one sand inlet hole.

[0035] Further, the lower mold is also provided with a stopper;

[0036] The stopper is located between the lower center groove and the lower slider groove, and the stopper protrudes upwardly on the groove bottom surface of the lower center groove and the lower slider groove;

[0037] The stopper is used to limit the depth of the slider extending into the lower water jacket core forming cavity.

[0038] The technical scheme of the sand core mold for integrally forming the double-layer water jacket has the beneficial effects that the structure that the bottom of the upper water jacket core forming cavity is communicated with the top of the lower water jacket core forming cavity can integrally form the upper water jacket core and the lower water jacket core, the bottom of the upper water jacket core after forming is connected with the top of the lower water jacket core, the displacement phenomenon of the upper water jacket core and the lower water jacket core during forming is avoided, the endoscopy inspection process is saved, the casting qualified rate of the cylinder head is improved, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of the integrally formed sand core mold for a double-layer water jacket according to the present invention;

[0040] Figure 2 This is a schematic diagram of the upper mold according to an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the lower mold structure according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the installation structure of the upper mold, slider, and pull block in one embodiment of the present invention during sand core molding;

[0043] Figure 5 This is a schematic diagram of the installation structure of the lower mold, insert, and core pulling in one embodiment of the present invention during sand core molding;

[0044] Figure 6 for Figure 2 An enlarged view of part A in the image;

[0045] Figure 7 for Figure 3 An enlarged view of part B in the image;

[0046] The components include: upper mold connecting plate 1; upper mold 2; lower mold 3; lower mold connecting plate 4; sand injection plate 5; upper top plate 6; lower top plate 7; first telescopic cylinder 8; second telescopic cylinder 9; first through hole 10; first sand inlet hole 20; fourth extension groove 29; lower ejector pin hole 30; lower center groove 31; lower slider groove 32; block extraction groove 33; first extension groove 34; stop block 35; second extension groove 36; sand injection tube 51; upper ejector pin 61; lower ejector pin 71; first protrusion 211; third extension groove 291; second protrusion 311; sand core 100; first connecting part 1001; second connecting part 1002. Detailed Implementation

[0047] The following is in conjunction with the appendix Figures 1-7 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0048] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0049] In the description of the utility model, need explanation, unless another explicit provision and limitation, term "installation", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can be indirectly connected through intermediate medium, can say two element internal communication.For ordinary skilled in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0050] An integrally formed sand core mold for a double-layer water jacket, comprising an upper mold connecting plate 1, an upper mold 2, a lower mold 3 and a lower mold connecting plate 4 arranged in sequence from top to bottom; the upper mold 2 is installed on an upper mold frame through the upper mold connecting plate 1, and the lower mold 3 is installed on a lower mold frame through the lower mold connecting plate 4;

[0051] The upper mold 2 is provided with an upper center groove 21, an upper slider groove 22, a plurality of insert grooves 23 and a plurality of sand inlet holes 20; the lower mold 3 is provided with a lower center groove 31, a lower slider groove 32 and at least one draw block groove 33;

[0052] The upper center groove 21, the upper slider groove 22 and the plurality of insert grooves 23 are respectively recessed upward from the bottom surface of the upper mold 2, and the upper slider groove 22 and the plurality of insert grooves 23 are arranged around the periphery of the upper center groove 21; the lower center groove 31, the lower slider groove 32 and the draw block groove 33 are respectively recessed downward from the top surface of the lower mold 3, and the lower slider groove 32 and the draw block groove 33 are respectively arranged close to the lower center groove 31; the upper slider groove 22 and the lower slider groove 32 are oppositely arranged and form a slider cavity; the inner side ends of the upper slider groove 22, the insert groove 23, the lower slider groove 32 and the draw block groove 33, and the upper center groove 21 and the lower center groove 31 are in communication with each other, and the outer side ends of the upper slider groove 22 and the insert groove 23 respectively extend along the horizontal direction and penetrate through the upper mold 2; the outer side ends of the lower slider groove 32 and the draw block groove 33 respectively extend along the horizontal direction and penetrate through the lower mold 3;

[0053] The insert groove 23 is provided with an insert 26, the insert 26 is provided with a draw core 27, the slider cavity is provided with a slider 28, and the draw block groove 33 is provided with a draw block 36; the draw core 27, the slider 28 and the draw block 36 can respectively extend in the horizontal direction; the inner side end surface of the insert 26 is connected with the groove wall surface of the upper center groove 21, the inner side end of the draw core 27 is used for penetrating through the insert 26 and being inserted into the upper center groove 21; the gap among the upper center groove 21, the insert 26, the draw core 27 and the slider 28 constitutes an upper water jacket sand core forming cavity; the inner side end of the draw block 36 is used for penetrating through the insert 26 and being inserted into the lower center groove 31, the inner side end of the slider 28 is used for extending into the upper center groove 21 and the lower center groove 31 and abutting against the draw core 27 and the draw block 36; the gap among the lower center groove 31, the draw block 36 and the slider 28 constitutes a lower water jacket sand core forming cavity; the bottom of the upper water jacket sand core forming cavity is connected with the top of the lower water jacket sand core forming cavity;

[0054] The lower end of the sand inlet hole 20 is connected with the upper water jacket sand core forming cavity, and the upper end of the sand inlet hole 20 penetrates through the upper mold 2 upwards, and a plurality of sand inlet holes 20 are arranged at intervals.

[0055] Figure 1 It is a structure schematic view of one embodiment of the sand core mold for integrally forming the double-layer water jacket, Figure 2 It is a structure schematic view of one embodiment of the upper mold 2, Figure 2 The upper mold 2 in the upper mold 2 is provided with three inserts 26 and three draw cores 27, Figure 3 It is a structure schematic view of one embodiment of the lower mold 3.

[0056] In use, the upper mold frame is lowered and close to the lower mold frame, the upper mold 2 and the lower mold 3 are closed, and the draw core 27, the slider 28 and the draw block 36 are respectively extended into the mold, then the sand wax is shot into the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity through a plurality of sand inlet holes 20, after the sand wax fills the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity, the sand wax in the mold is heated and solidified at high temperature, then the draw core 27, the slider 28 and the draw block 36 are respectively retracted from the mold, then the upper mold frame is raised, the upper mold 2 and the lower mold 3 are separated, and the sand core 100 of the double-layer water jacket including the upper water jacket and the lower water jacket which is integrally formed can be taken out from the lower mold 3.

[0057] Further, it further includes a sand shooting plate 5 and an upper top plate 6;

[0058] The sand shooting plate 5 and the upper top plate 6 are respectively installed above the upper mold 2 and can move horizontally and can be lifted and lowered; the upper mold connecting plate 1 is provided with a plurality of first through holes 10;

[0059] The first through hole 10 penetrates the upper die connecting plate 1 from top to bottom, and a plurality of first through holes 10 are arranged one by one corresponding to a plurality of sand inlet holes 20;

[0060] The sand shooting plate 5 is provided with a plurality of sand shooting pipes 51, and a plurality of sand shooting pipes 51 are arranged one by one corresponding to a plurality of sand inlet holes 20; the lower end of the sand shooting pipe 51 penetrates the sand shooting plate 5 downward, and the lower end of the sand shooting pipe 51 is used for penetrating the first through hole 10 and inserting into the corresponding sand inlet hole 20; the upper end of the sand shooting pipe 51 is used for inputting sand wax to fill the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity;

[0061] The upper die plate 6 is provided with a plurality of upper ejector pins 61, and the upper ejector pins 61 are arranged one by one corresponding to the sand inlet holes 20;

[0062] The upper end of the upper ejector pin 61 is fixed to the upper die plate 6; the lower end of the upper ejector pin 61 extends downward and is used for inserting into the corresponding sand inlet hole 20 to eject the solidified sand core in the upper water jacket sand core forming cavity downward.

[0063] As shown in Figure 1 , Figure 2 and Figure 6 When it is necessary to shoot sand into the mold, the sand shooting plate 5 is moved to the upper side of the upper die 2 in the horizontal direction after the mold is closed, then the sand shooting plate 5 is lowered, the lower ends of the plurality of sand shooting pipes 51 are inserted into the plurality of sand inlet holes 20 respectively, then the sand wax is output through the upper ends of the sand shooting pipes 51, and the sand wax fills the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity, the sand shooting plate 5 is raised after shooting sand, and is moved to reset in the horizontal direction.

[0064] After the sand wax in the mold is solidified after high temperature heating, the upper die plate 6 is moved to the upper side of the upper die 2 in the horizontal direction, then the upper die plate 6 is lowered, the plurality of upper ejector pins 61 are inserted into the plurality of sand inlet holes 20, the lower ends of the plurality of upper ejector pins 61 abut against the top surface of the sand wax filled in the plurality of sand inlet holes 20, at the same time, the core pulling 27, the slider 28 and the pulling block 36 are retracted from the mold respectively, then the upper die frame is raised again, the integrally formed sand core 100 is separated from the upper die 2, and the integrally formed sand core 100 is exposed above the lower die 3, which can improve the operation convenience of taking the sand core 100.

[0065] Further, the lower die plate 7 is further provided;

[0066] The lower die plate 7 is installed below the lower die 3 in a lifting manner;

[0067] The lower die connecting plate 4 is provided with a plurality of second through holes, and the second through holes penetrate the lower die connecting plate 4 from bottom to top;

[0068] The lower mold 3 has multiple lower ejector pin holes 30. The upper end of the lower ejector pin hole 30 is connected to the lower water jacket sand core forming cavity, and the lower end of the lower ejector pin hole 30 penetrates the lower mold 3 downwards. The multiple lower ejector pin holes 30 are distributed at intervals.

[0069] The lower top plate 7 is equipped with a plurality of lower ejector pins 71, and the plurality of lower ejector pins 71 correspond one-to-one with the plurality of lower ejector pin holes 30. The lower end of the lower ejector pin 71 is fixed to the lower top plate 7, and the upper end of the lower ejector pin 71 is used to pass upward through the second through hole and insert into the corresponding lower ejector pin hole 30.

[0070] like Figure 1 , Figure 3 and Figure 7 As shown, when the lower ends of the multiple upper ejector pins 61 abut against the top surface of the sand wax filled in the multiple sand inlet holes 20, and the upper mold frame rises, the integrally formed sand core 100 separates from the upper mold 2, and the lower top plate 7 rises upward, so that the lower ejector pins 71 pass upward through the second through hole and are inserted into the corresponding lower ejector pin hole 30, and extend into the lower water jacket sand core forming cavity, so that the upper ends of the multiple lower ejector pins 71 abut against the bottom surface of the sand core 100 in the lower water jacket sand core forming cavity, thereby causing the sand core 100 to rise upward and separate from the lower mold 3, which can further improve the ease of operation of picking up the sand core 100.

[0071] Furthermore, it also includes multiple first telescopic cylinders 8;

[0072] The first telescopic cylinder 8 is mounted on the bottom surface of the upper mold connecting plate 1 near the outer peripheral surface of the upper mold 2; the output end of the first telescopic cylinder 8 is connected to the outer end of the core pulling 27.

[0073] like Figure 2 , Figure 4 and Figure 5 As shown, the first telescopic cylinder 8 provides power for the telescopic movement of the core puller 27.

[0074] Furthermore, it also includes at least two second telescopic cylinders 9;

[0075] The second telescopic cylinder 9 is mounted on the top surface of the lower mold connecting plate 4 near the outer peripheral surface of the lower mold 3; the output end of the second telescopic cylinder 9 is connected to the outer end of the slider 28 or the pull block 36.

[0076] like Figures 3-5 As shown, the second telescopic cylinder 9 provides power for the telescopic movement of the slider 28 or the drawer block 36.

[0077] Furthermore, the bottom surface of the upper central groove 21 is provided with a downwardly protruding first protrusion 211;

[0078] The edge of the first protrusion 211 is spaced apart from the groove wall of the upper center groove 21, and the bottom surface of the first protrusion 211 is used to abut against the top surface of the core pulling rod 27 or the slider 28.

[0079] As shown in Figure 2 , Figure 5 and Figure 6 , in this way, the shape of the void portion in the upper water jacket of the sand core 100 can be adjusted by controlling the shape of the first protrusion 211 in the upper mold 2 that is opened, and the diameter of the solid portion distributed in a mesh shape in the upper water jacket of the sand core 100 can be adjusted by adjusting the size of the gap between the edge of the first protrusion 211 and the groove wall of the upper center groove 21 when the first protrusion 211 in the upper mold 2 is opened, so as to adjust the diameter of the corresponding water flow channel in the upper water jacket.

[0080] Further, the groove bottom surface of the lower center groove 31 is provided with a plurality of second protrusions 311 protruding upward;

[0081] The plurality of second protrusions 311 are spaced apart, and the edge of each second protrusion 311 is also spaced apart from the groove wall of the lower center groove 31, and the top surface of the second protrusion 311 is used to abut against the top surface of the core pulling rod 36 or the slider 28.

[0082] As shown in Figure 3 , Figure 4 and Figure 7 , in this way, the shape of the void portion in the lower water jacket of the sand core 100 can be adjusted by controlling the shape of each second protrusion 311 in the lower mold 3 that is opened, and the diameter of the solid portion distributed in a mesh shape in the lower water jacket of the sand core 100 can be adjusted by adjusting the size of the gap between the edge of each second protrusion 311 and the corresponding groove wall of the lower center groove 31 when each second protrusion 311 in the lower mold 3 is opened, so as to adjust the diameter of the corresponding water flow channel in the lower water jacket.

[0083] Further, the lower mold 3 is also provided with a first extension groove 34 and a second extension groove 36;

[0084] The first extension groove 34 and the second extension groove 36 are respectively recessed downward from the top surface of the lower mold 3, and the first extension groove 34 and the second extension groove 36 are respectively close to and communicated with the lower center groove 31;

[0085] The groove bottom surface of the first extension groove 34 and the second extension groove 36 is provided with at least one lower ejector pin hole 30;

[0086] The upper die 2 is provided with a third extension groove 291 and a fourth extension groove 29, the third extension groove 291 and the fourth extension groove 29 are respectively concave to the bottom surface of the upper die 2, the third extension groove 291 is opposite to the first extension groove 34 and communicates with the first extension groove 34, and the fourth extension groove 29 is opposite to the second extension groove 36 and communicates with the second extension groove 36; the third extension groove 291 and the fourth extension groove 29 respectively communicate with the lower end of at least one sand inlet hole 20.

[0087] As shown in Figure 3 and Figure 4 , the third extension groove 291 is opposite to the first extension groove 34 and communicates with the first extension groove 34, forming a sand core forming cavity of the first connecting part 1001; the fourth extension groove 29 is opposite to the second extension groove 36 and communicates with the second extension groove 36, forming a sand core forming cavity of the second connecting part 1002, so that the formed sand core 100 is respectively connected with the first connecting part 1001 and the second connecting part 1002, thereby having better shock resistance, improving the qualified rate of the sand core 100, and reducing the damage rate of the sand core 100 in the transportation process.

[0088] Further, the lower die 3 is also provided with a stop block 35;

[0089] The stop block 35 is located between the lower center groove 31 and the lower slider groove 32, and the stop block 35 protrudes upward from the groove bottom surface of the lower center groove 31 and the lower slider groove 32;

[0090] The stop block 35 is used for limiting the depth of the slider 28 extending into the lower water jacket sand core forming cavity.

[0091] As shown in Figure 3 , Figure 4 and Figure 7 , by limiting the depth of the slider 28 extending into the lower water jacket sand core forming cavity through the stop block 35, the size of the gap between the lower center groove 31, the ejector block 36 and the slider 28 is controlled, and then the diameter of the corresponding water flow channel in the lower water jacket is controlled.

[0092] As described above, as shown in Figures 1-7 the embodiment of the utility model, the integrally formed sand core mold for the double-layer water jacket can integrally form the upper water jacket sand core and the lower water jacket sand core, and the bottom of the upper water jacket sand core is connected with the top of the lower water jacket sand core after forming, so that the displacement phenomenon of the upper water jacket sand core and the lower water jacket sand core during forming can be avoided, the endoscopic inspection process can be saved, the casting qualified rate of the cylinder cover is improved, and the manufacturing cost is reduced.

[0093] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. An integrally formed sand core mold for a double-layer water jacket, comprising, from top to bottom, an upper mold connecting plate, an upper mold, a lower mold, and a lower mold connecting plate; the upper mold is installed on an upper mold frame through the upper mold connecting plate, and the lower mold is installed on a lower mold frame through the lower mold connecting plate, characterized in that: the upper mold is provided with an upper center recess, an upper slider slot, a plurality of insert block slots, and a plurality of sand inlet holes; the lower mold is provided with a lower center recess, a lower slider slot, and at least one draw block slot; the upper center recess, the upper slider slot, and the plurality of insert block slots are respectively recessed upward from the bottom surface of the upper mold, and the upper slider slot and the plurality of insert block slots are arranged around the periphery of the upper center recess; the lower center recess, the lower slider slot, and the draw block slot are respectively recessed downward from the top surface of the lower mold, and the lower slider slot and the draw block slot are respectively arranged close to the lower center recess; the upper slider slot and the lower slider slot are opposite to each other and form a slider cavity; the inner side ends of the upper slider slot, the insert block slot, the lower slider slot, and the draw block slot, and the upper center recess and the lower center recess are in communication with each other, and the outer side ends of the upper slider slot and the insert block slot respectively extend in the horizontal direction and penetrate through the upper mold; the outer side ends of the lower slider slot and the draw block slot respectively extend in the horizontal direction and penetrate through the lower mold; the insert block slot is installed with an insert block, the slider cavity is installed with a slider, and the draw block slot is installed with a draw block; the insert core, the slider, and the draw block are respectively telescopic in the horizontal direction; the inner side end surface of the insert block is connected with the slot wall surface of the upper center recess, and the inner side end of the insert core is used to penetrate through the insert block and be inserted into the upper center recess; the gap between the upper center recess, the insert block, the insert core, and the slider constitutes an upper water jacket sand core forming cavity; the inner side end of the draw block is used to penetrate through the insert block and be inserted into the lower center recess, and the inner side end of the slider is used to extend into the upper center recess and the lower center recess and abut against the insert core and the draw block; the gap between the lower center recess, the draw block, and the slider constitutes a lower water jacket sand core forming cavity; the bottom of the upper water jacket sand core forming cavity is in communication with the top of the lower water jacket sand core forming cavity; the lower end of the sand inlet hole is in communication with the upper water jacket sand core forming cavity, and the upper end of the sand inlet hole penetrates through the upper mold upward, and a plurality of sand inlet holes are arranged at intervals.

2. The integrally formed sand core mold for a dual layer water jacket of claim 1, wherein, It also comprises a sand shooting plate and an upper top plate; the sand shooting plate and the upper top plate are respectively installed above the upper mold and can move horizontally and can be lifted and lowered; the upper mold connecting plate is provided with a plurality of first through holes; the first through holes penetrate through the upper mold connecting plate from top to bottom, and a plurality of the first through holes are arranged one-to-one with a plurality of the sand inlet holes; the sand shooting plate is installed with a plurality of sand shooting pipes, and a plurality of the sand shooting pipes are arranged one-to-one with a plurality of the sand inlet holes; the lower end of the sand shooting pipe penetrates through the sand shooting plate downward, and the lower end of the sand shooting pipe is used to penetrate through the first through hole and be inserted into the corresponding sand inlet hole; the upper end of the sand shooting pipe is used to input sand wax to fill the upper water jacket sand core forming cavity and the lower water jacket sand core forming cavity. The upper top plate is provided with a plurality of upper ejecting pins, which are arranged one-to-one with the sand inlet holes; The upper end of the upper ejecting pin is fixed to the upper top plate, and the lower end of the upper ejecting pin extends downward and is used for inserting into the corresponding sand inlet hole to push out the solidified sand core in the upper water jacket sand core forming cavity.

3. The integrally formed sand core mold for a dual layer water jacket of claim 2, wherein, A lower top plate is further included; The lower top plate is installed below the lower mold in a lifting manner; The lower mold connecting plate is provided with a plurality of second through holes, which penetrate the lower mold connecting plate from bottom to top; The lower mold is provided with a plurality of lower ejecting pin holes, the upper end of the lower ejecting pin hole is communicated with the lower water jacket sand core forming cavity, the lower end of the lower ejecting pin hole penetrates the lower mold downward, and a plurality of lower ejecting pin holes are distributed at intervals; The lower top plate is provided with a plurality of lower ejecting pins, the plurality of lower ejecting pins correspond to the plurality of lower ejecting pin holes one-to-one, the lower end of the lower ejecting pin is fixed to the lower top plate, and the upper end of the lower ejecting pin is used for penetrating the second through hole upward and inserting into the corresponding lower ejecting pin hole.

4. The integrally formed sand core mold for a dual layer water jacket of claim 1, wherein, A plurality of first telescopic air cylinders are further included; The first telescopic air cylinder is arranged on the bottom surface of the upper mold connecting plate close to the outer circumferential surface of the upper mold, and the output end of the first telescopic air cylinder is connected to the outer side end of the core pulling.

5. The integrally formed sand core mold for a dual layer water jacket of claim 1, wherein, At least two second telescopic air cylinders are further included; The second telescopic air cylinder is arranged on the top surface of the lower mold connecting plate close to the outer circumferential surface of the lower mold, and the output end of the second telescopic air cylinder is connected to the outer side end of the sliding block or the pulling block.

6. The integrally formed sand core mold for a dual layer water jacket of claim 1, wherein, The bottom surface of the upper center groove is provided with a first protruding block downward; The edge of the first protruding block is left with a gap between the groove wall of the upper center groove, and the bottom surface of the first protruding block is used for abutting against the top surface of the core pulling or the sliding block.

7. The integrally formed sand core mold for a dual layer water jacket of claim 1, wherein, The bottom surface of the lower center groove is provided with a plurality of second protruding blocks upward; The plurality of second protruding blocks are left with gaps between each other, and the edge of each second protruding block is also left with a gap between the groove wall of the lower center groove, and the top surface of the second protruding block is used for abutting against the top surface of the pulling block or the sliding block.

8. The integrally formed sand core mold for a dual layer water jacket of claim 3, wherein, The lower mold is further provided with a first extension groove and a second extension groove; The first extension groove and the second extension groove are respectively recessed downward on the top surface of the lower mold, and the first extension groove and the second extension groove are respectively close to and communicated with the lower center groove; The bottom surface of the first extension groove and the second extension groove is provided with at least one lower ejecting pin hole; The upper mold is provided with a third extension groove and a fourth extension groove, the third extension groove and the fourth extension groove are respectively recessed upward on the bottom surface of the upper mold, the third extension groove is opposite to and communicated with the first extension groove, the fourth extension groove is opposite to and communicated with the second extension groove, and the third extension groove and the fourth extension groove are respectively communicated with the lower end of at least one sand inlet hole.

9. The integrally formed sand core mold for a dual layer water jacket of claim 3, wherein, The lower mold is further provided with a stop block; The stop block is located between the lower center groove and the lower sliding block groove, and the stop block protrudes upward on the bottom surface of the lower center groove and the lower sliding block groove; The stop block is used for limiting the depth of the sliding block extending into the lower water jacket sand core forming cavity.

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