CN223129277U - Integrated casting model of cylinder body and cylinder cover - Google Patents
Integrated casting model of cylinder body and cylinder coverInfo
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- CN223129277U CN223129277U CN202422393830.7U CN202422393830U CN223129277U CN 223129277 U CN223129277 U CN 223129277U CN 202422393830 U CN202422393830 U CN 202422393830U CN 223129277 U CN223129277 U CN 223129277U
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Abstract
本实用新型公开了一种缸体和缸盖的一体铸造模型，包括模具本体及浇注组件，模具本体包括支撑砂芯、缸盖成型砂芯、缸体成型砂芯一及缸体成型砂芯二，支撑砂芯上端面开设有装配槽，浇注组件下端卡接在装配槽内；缸盖成型砂芯、缸体成型砂芯一及缸体成型砂芯二从下至上依次紧密堆叠在支撑砂芯上且其内部对应设有相互连通的缸盖成型腔、缸体成型腔一及缸体成型腔二。本实用新型设计的缸体和缸盖的一体铸造模型，其能够简化组芯造型过程，降低现场操作难度和铸件废品率，提高汽车发动机铸件的生产效率和质量。
The utility model discloses an integrated casting model of a cylinder block and a cylinder head, comprising a mold body and a pouring assembly, wherein the mold body comprises a supporting sand core, a cylinder head molding sand core, a cylinder body molding sand core 1 and a cylinder body molding sand core 2, wherein an assembly groove is provided on the upper end surface of the supporting sand core, and the lower end of the pouring assembly is clamped in the assembly groove; the cylinder head molding sand core, the cylinder body molding sand core 1 and the cylinder body molding sand core 2 are stacked closely on the supporting sand core from bottom to top in sequence, and the cylinder head molding cavity, the cylinder body molding cavity 1 and the cylinder body molding cavity 2 are correspondingly provided inside the supporting sand core, which are interconnected. The integrated casting model of the cylinder block and the cylinder head designed by the utility model can simplify the core assembly molding process, reduce the difficulty of on-site operation and the casting scrap rate, and improve the production efficiency and quality of automobile engine castings.
Description
Technical Field
The utility model relates to the technical field of automobile engine castings, in particular to an integrated casting model of a cylinder body and a cylinder cover.
Background
In the field of automobile engine manufacturing, the cylinder body and the cylinder cover are core components of the engine, the quality and the production efficiency of the engine directly affect the overall performance and the manufacturing cost of the engine, the product structure is very complex, the product size requirement is particularly high, and the wall thickness is in the range of 5-7 mm. The existing cylinder body and cylinder cover casting process generally adopts separate casting, and a traditional mold molding casting process is generally used, and the adopted molding materials are divided into furan resin sand, damp mold sand, precoated sand and the like. The core making method includes manual core making and core making. In the conventional art, the cylinder block and the cylinder head respectively require a plurality of sand cores to form a complex internal structure thereof. For example, the cylinder cover needs a plurality of sand cores such as a tray core, a water jacket core, an oil duct core, an air inlet channel core, an air outlet channel core and the like, and the cylinder body also needs a plurality of sand cores such as a front end cover sand core, a rear end cover sand core, a crankcase sand core, a water jacket core, a cover core and the like, and after the sand cores are assembled into a whole, casting molten iron is cooled to obtain a cylinder body blank and a cylinder cover blank. In the core assembly process, a special fixture and manual measurement mode are generally adopted to control the core assembly precision. However, this approach has the following disadvantages:
The number of sand cores is large, the sand cores need to be accurately aligned in the core assembling process, so that the core assembling molding process becomes extremely complex, the technical grade requirement on site workers is high, the labor intensity is increased, the production period is prolonged, and the positioning errors and accumulated errors in the core assembling process also easily cause inaccurate casting size and uneven wall thickness, so that the casting quality is influenced.
Therefore, how to provide an integrated casting model of a cylinder body and a cylinder cover, which can simplify the core assembly molding process, reduce the field operation difficulty and the rejection rate of castings, and improve the production efficiency and quality of castings of automobile engines, is a problem to be solved by those skilled in the art.
Disclosure of utility model
In view of the above, the utility model provides an integrated casting model of a cylinder body and a cylinder cover, which can simplify the core assembly molding process, reduce the field operation difficulty and the casting rejection rate, and improve the production efficiency and quality of the automobile engine casting.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The integrated casting model for the cylinder body and the cylinder cover comprises a die body and a casting assembly, wherein the die body comprises a supporting sand core, a cylinder cover molding sand core, a cylinder body molding sand core I and a cylinder body molding sand core II, an assembly groove is formed in the upper end face of the supporting sand core, and the lower end of the casting assembly is clamped in the assembly groove;
The cylinder cover molding sand core, the cylinder body molding sand core I and the cylinder body molding sand core II are sequentially and tightly stacked on the supporting sand core from bottom to top, and a cylinder cover molding cavity, a cylinder body molding cavity I and a cylinder body molding cavity II which are communicated with each other are correspondingly arranged in the cylinder cover molding sand core, the cylinder cover molding cavity is communicated with a pouring outlet of a pouring assembly, the inner wall surface of the lower end of the cylinder cover molding cavity corresponds to the lower end surface of the molding cylinder cover, the inner wall surface of the upper end of the cylinder cover molding cavity corresponds to the water jacket top surface of the molding cylinder cover, the inner wall surface of the upper end of the cylinder body molding cavity I corresponds to the top flange surface of the molding cylinder body, and the inner wall surface of the upper end of the cylinder body molding cavity II corresponds to the cylinder mouth surface of the molding cylinder body.
According to the technical scheme, the integrated casting model for the cylinder body and the cylinder cover is provided, the support sand core is used for supporting, the cylinder cover is used for forming the sand core, the cylinder body is used for forming the sand core I and the cylinder body is used for forming the sand core II, the cylinder cover is integrally and separately arranged, the cylinder body and the cylinder cover do not need to be cast independently, the combination of the cylinder body and the cylinder cover can be cast directly, the core assembly molding process is simplified, the requirements on the skill level of field workers and the operation difficulty are reduced, the rejection rate of castings is further reduced, and the production efficiency and the quality of castings of automobile engines are improved.
The setting of the parting surface can be better suitable for the shape of the complex casting, is convenient to manufacture, can be better suitable for the shape of the complex casting, and improves the manufacturing precision and the quality of the casting.
The parting surface and the sand core are arranged in such a way that a cylinder body opening is upward, a cylinder cover is downward, and the casting direction is formed, and the arrangement of the structure is conducive to the smoother filling of the metal liquid into the cavity under the action of gravity. Because the cylinder body structure is relatively complicated, the risk of gas entrainment can be reduced to the jar mouth upwards, guarantees the quality of foundry goods. Meanwhile, the cylinder cover is arranged downwards, so that the pressure of molten metal on the inner cavity core of the cylinder cover in the casting process is relatively small, and the possibility of damage to the sand core caused by overlarge pressure is reduced.
Preferably, the support sand core comprises a sand core body I and a bottom plate core which are integrally formed by 3D printing, wherein the sand core body I is in a square hollow structure, the bottom plate core is formed at the center of the upper end surface of the sand core body and is supported on the lower end wall surface of the cylinder cover forming cavity, and the assembly grooves are formed on two sides of the sand core body corresponding to the bottom plate core.
The assembly groove can ensure that molten metal can stably and orderly flow into the cavity, provides a good foundation for forming the casting, and the bottom plate core provides a stable bottom support for the casting, so that the stability of the casting in the forming process is ensured.
The cylinder cover molding sand core comprises a sand core body II, an air inlet channel core, an air outlet channel core and a water jacket core which are integrally formed by 3D printing, wherein the sand core body II is in a square hollow structure and is clamped at the upper end of the sand core body I;
The water jacket core is formed on the upper end face of the sand core body II, the water jacket core is provided with a cavity I, the lower end of the cylinder body forming sand core II extends into the cavity I, a second cavity is formed between the outer wall of the cylinder body forming sand core II and the inner wall of the cavity I, the second cavity is communicated with the first cavity, the second cavity and the first cavity form a cylinder cover forming cavity, and the inner wall face of the upper end of the second cavity corresponds to the water jacket top face of the forming cylinder cover.
The water jacket core is crucial to a cooling system of the casting, can effectively control the temperature of the casting in the working process, improves the service life and performance of the casting, and the air inlet channel core and the air outlet channel core provide channels for air inlet and air outlet of the casting, so that the normal operation of the casting in the working process is ensured.
Further, the lower end of the water jacket core is horizontally provided with a sand core exhaust hole.
The arrangement of the sand core exhaust holes greatly reduces the generation of choking fire of the casting caused by burning and exhausting resin in the sand core in the casting pouring process, and improves the quality and the yield of the casting.
The cylinder body forming sand core I comprises a sand core body III, a front end core, a rear end core and a tappet core which are integrally formed by 3D printing, wherein the sand core body III is arranged in a hollow structure and is clamped at the upper end of the sand core body II, a cavity II is formed in the center of the sand core body II, and the upper end of the water jacket core extends into the cavity II;
The tappet rod core and the front end core and the rear end core are respectively molded on the inner wall of the cavity II and correspond to the upper end of the water jacket core, a gap is reserved between the tappet rod core and the front end core and corresponds to the upper end of the water jacket core, the gap corresponds to the cavity I and is communicated with the cavity I, the lower end of the cylinder body molding sand core II penetrates through the gap to be located in the cavity I, a third cavity is formed between the inner wall of the gap and the outer wall corresponding to the lower end of the cylinder body molding sand core II, a fourth cavity is formed between the outer wall of the tappet rod core, the front end core and the rear end core and the inner wall of the sand core body III, the third cavity and the fourth cavity form a cylinder body molding cavity I, the upper end inner wall surfaces of the third cavity and the fourth cavity are flush and correspond to the top flange surface of the molding cylinder cover, the third cavity is communicated with the second cavity, and the fourth cavity is communicated with the first cavity.
The front end core and the rear end core provide specific shapes and structures for the front end and the rear end of the casting, ensure the accuracy and the reliability of the casting in the installation and the use process, and the tappet core provides support and positioning for a tappet part in the casting, thereby ensuring the normal movement of the tappet in the working process.
The cylinder body molding sand core II comprises a sand core body IV, a cylinder core and a riser core, wherein the sand core body IV is integrally formed by 3D printing, the sand core body IV is in a square hollow structure and is clamped at the upper end of the sand core body III, the cylinder core is formed at the lower end of the sand core body IV and penetrates through a gap to be located in the cavity I, the riser core is formed at the upper end of the sand core body IV, a cylinder body molding cavity II is formed between the outer wall of the riser core, the outer wall of the cylinder core and the inner wall of the sand core body IV, and the cylinder body molding cavity II is respectively communicated with the third cavity and the fourth cavity.
The riser core plays a role in feeding in the solidification process of the casting, so that the defects of shrinkage cavity, shrinkage porosity and the like of the casting can be effectively prevented, the quality of the casting is improved, the shape and the structure of the cylinder part of the casting are provided by the cylinder core, and the tightness and the performance of the cylinder in the working process are ensured.
The casting model is built on the basis that three-dimensional modeling of the engine casting is finished, and through a 3D printing technology, the first production verification of a new product can be finished within two weeks while the die manufacturing cost during casting production is saved, so that the development progress of the novel casting of the automobile engine is greatly promoted. Meanwhile, the 3D printing technology can connect the sand cores of the key parts of the cylinder body and the cylinder cover into a whole because the problems of stripping and material removing are not required to be considered, so that the total number of the sand cores is reduced, the core assembly molding process is simplified, the field operation difficulty is reduced, and the rejection rate of castings is reduced.
Preferably, the pouring assembly comprises a transverse runner, a longitudinal runner and a plurality of inner runners, wherein the transverse runner is clamped in the assembly groove, one end of the longitudinal runner is communicated with the transverse runner, the other end of the longitudinal runner is respectively and upwards penetrates through the second sand core body, the third sand core body and the fourth sand core body, and is positioned above the fourth sand core body, one ends of the inner runners are fixed and communicated with the upper end face of the transverse runner, and the other ends of the inner runners are communicated with the first cavity.
The position of the pouring component corresponding to the die body forms low-side pouring open pouring, and the arrangement of the mode can enable molten metal to stably enter the die cavity, so that turbulence and splashing are reduced, and the generation probability of oxide slag inclusion is reduced. The water jacket sand core of the cylinder body and the inner cavity core of the cylinder cover are extremely weak (the water jacket sand core of the cylinder body and the inner cavity core of the cylinder cover are only 5-6mm wide and are extremely weak and easy to stick sand), the impact on the sand core can be reduced by stable casting, the risk of deformation or damage of the sand core is reduced, and the risk of sand sticking is reduced.
Further, the pouring assembly further comprises a filter screen, and the filter screen is vertically arranged on the inner wall of the longitudinal pouring channel.
Further, the pouring assembly further comprises an oil bottle riser, and the oil bottle riser is arranged in the riser core. The arrangement of the structure can provide extra molten metal in the solidification process of the casting, and the casting is fed, so that the defects of shrinkage cavity, shrinkage porosity and the like are prevented. The top of the flange can be placed under the action of gravity, so that molten metal in the riser can more easily flow into the part of the casting, which needs to be fed, the riser of the oil bottle can also play the roles of exhausting and collecting slag, and in the casting process, gas and impurities in the cavity can be discharged through the riser, so that the purity of the casting is improved.
Preferably, the sand core positioning device further comprises a guiding positioning assembly, wherein the guiding positioning assembly comprises a plurality of lugs and guiding rods, the lugs are respectively integrally formed on two sides of the sand core body I, the sand core body II, the sand core body III and the sand core body IV and are correspondingly arranged from top to bottom, guiding holes are formed in the lugs and are correspondingly arranged from top to bottom, and the guiding rods vertically penetrate through the guiding holes on the same side to position the core assembly.
Preferably, the peripheral sides of the upper end surfaces of the first sand core body, the second sand core body and the third sand core body are downwards sunken to form a frame-shaped concave part, and clamping frames matched with the concave parts are integrally formed at the positions of the lower end surfaces of the second sand core body, the third sand core body and the fourth sand core body, which correspond to the concave parts.
The utility model provides an integrated casting model of a cylinder body and a cylinder cover, which comprises the following production steps:
① Drawing a rectangular block with the length of 1500mm multiplied by 800mm in three-dimensional software, wrapping the whole engine casting and pouring assembly, and obtaining a complete casting mold;
② The casting mould is further core-separated, namely a supporting sand core is obtained by core separation from the position of the lower end face of the cylinder cover, a cylinder cover forming sand core is obtained by core separation from the position of the top face of the water jacket of the cylinder sleeve, a cylinder body forming sand core I and a cylinder body forming sand core II are obtained by core separation from the position of the top flange face of the cylinder body;
③ The cylinder cover molding sand core is lifted by the lug of the cylinder cover molding sand core, so that the guide hole of the cylinder cover molding sand core penetrates through the guide rod to position and core the cylinder cover molding sand core, and the concave part at the upper end of the supporting sand core and the clamping frame at the lower end of the cylinder cover molding sand core are used for clamping, so that metal liquid is prevented from leaking from the parting surface in the casting process;
④ And (3) adhering a water gap at the upper end of the vertical pouring gate and the riser for pouring, and adopting a bare pouring mode.
Compared with the prior art, the integrated casting model for the cylinder body and the cylinder cover is supported by the supporting sand core, the cylinder cover is formed into the sand core, the cylinder body is formed into the sand core I and the cylinder body is formed into the sand core II, the cylinder cover of the cylinder body is integrally and separately arranged, the cylinder body and the cylinder cover do not need to be independently cast, the combination of the cylinder cover of the cylinder body can be directly cast, the core assembly molding process is simplified, the requirements on the skill level of field workers and the operation difficulty are reduced, the rejection rate of castings is further reduced, the production efficiency and the quality of castings of automobile engines are improved, and the choking fire of the castings caused by the burning and exhausting of resin in the sand core in the casting pouring process is greatly reduced through the arrangement of the sand core exhaust holes, so that the quality and the yield of the castings are improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the structure of an integrated casting mold of a cylinder block and a cylinder head according to the present utility model.
Fig. 2 is a schematic structural view of a supporting sand core according to the present utility model.
Fig. 3 is a schematic structural view of a cylinder cover molding sand core provided by the utility model.
Fig. 4 is a cross-sectional view of a cylinder head molding sand core provided by the utility model.
Fig. 5 is a schematic structural view of a cylinder molding sand core one according to the present utility model.
Fig. 6 is a schematic structural diagram of a cylinder molding sand core II provided by the utility model.
Fig. 7 is a cross-sectional view of a mold body provided by the present utility model.
Fig. 8 is a schematic structural view of a casting assembly provided by the present utility model.
Fig. 9 is a schematic diagram of connection between a casting component and a mold body according to the present utility model.
Wherein, 1 is a supporting sand core, 11 is a sand core body I, 12 is a bottom plate core, and 13 is an assembly groove;
2 is a cylinder cover molding sand core, 21 is a sand core body II, 22 is an air inlet channel core, 23 is an air outlet channel core, 24 is a water jacket core, 241 is a cavity I, 25 is a sand core air outlet hole, 26 is a first cavity, and 27 is a second cavity;
The novel sand mold comprises a cylinder body forming sand core I, a sand core body III, a gap 311, front and rear end cores 32, a tappet core 33, a third cavity 34 and a fourth cavity 35, wherein the cylinder body forming sand core I is a cylinder body forming sand core I;
The cylinder body molding sand core II is 4, the sand core body IV is 41, the riser core is 42, the cylinder core is 43, and the cylinder body molding cavity II is 44;
5 is a pouring assembly, 51 is a horizontal pouring gate, 52 is a vertical pouring gate, and 53 is an inner pouring gate;
6 is a guiding and positioning component, 61 is an ear handle, 62 is a guiding hole, and 63 is a guiding rod;
7 is a concave part, 8 is a clamping frame.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-9, the embodiment of the utility model discloses an integrated casting model of a cylinder body and a cylinder cover, which comprises a die body and a casting component 5, wherein the die body comprises a supporting sand core 1, a cylinder cover molding sand core 2, a cylinder body molding sand core 3 and a cylinder body molding sand core 4, an assembly groove 13 is formed in the upper end surface of the supporting sand core 1, and the lower end of the casting component 5 is clamped in the assembly groove 13;
The cylinder cover molding sand core 2, the cylinder body molding sand core I3 and the cylinder body molding sand core II 4 are sequentially and tightly stacked on the supporting sand core 1 from bottom to top, and a cylinder cover molding cavity, a cylinder body molding cavity I and a cylinder body molding cavity II 44 which are communicated with each other are correspondingly arranged in the cylinder cover molding sand core, the cylinder cover molding cavity is communicated with a pouring outlet of the pouring assembly 5, the inner wall surface of the lower end of the cylinder cover molding cavity corresponds to the lower end surface of the molding cylinder cover, the inner wall surface of the upper end of the cylinder cover molding cavity corresponds to the water jacket top surface of the molding cylinder cover, the inner wall surface of the upper end of the cylinder body molding cavity I corresponds to the top flange surface of the molding cylinder body, and the inner wall surface of the upper end of the cylinder body molding cavity II corresponds to the cylinder mouth surface of the molding cylinder body.
Specifically, the supporting sand core 1 comprises a sand core body I11 and a bottom plate core 12 which are integrally formed by 3D printing, wherein the sand core body I11 is in a square hollow structure, the bottom plate core 12 is formed at the center of the upper end face of the sand core body I11 and is supported on the lower end wall face of a cylinder cover forming cavity, and the assembly grooves 13 are formed on two sides of the sand core body I11 corresponding to the bottom plate core 12.
The cylinder cover molding sand core 2 comprises a sand core body II 21, an air inlet channel core 22, an air outlet channel core 23 and a water jacket core 24 which are integrally formed by 3D printing, wherein the sand core body II 21 is in a square hollow structure and is clamped at the upper end of the sand core body I11;
The water jacket core 24 is formed on the upper end surface of the sand core body two 21, the water jacket core 24 is provided with a first cavity 241, the lower end of the cylinder body forming sand core two 4 stretches into the first cavity 241, a second cavity 27 is formed between the outer wall of the cylinder body forming sand core two 4 and the inner wall of the first cavity 241, the second cavity 27 is communicated with the first cavity 26, the second cavity and the first cavity form a cylinder cover forming cavity, and the inner wall surface of the upper end of the second cavity 27 corresponds to the water jacket top surface of the forming cylinder cover.
Wherein, sand core vent holes 25 are horizontally arranged at the lower end of the water jacket core 24.
The cylinder body forming sand core I3 comprises a sand core body III 31, a front end core 32, a rear end core 32 and a tappet core 33 which are integrally formed by 3D printing, the sand core body III 31 is arranged in a hollow structure and is clamped at the upper end of the sand core body II 21, a cavity II is formed in the center of the sand core body II, and the upper end of the water jacket core 24 extends into the cavity II;
The tappet core 33 and the front end core 32 are respectively molded on the inner wall of the cavity II and correspond to the upper end of the water jacket core 24, a gap 311 is reserved between the tappet core 33 and the front end core 32, the gap 311 corresponds to and is communicated with the cavity I241, the lower end of the cylinder molding sand core II 4 passes through the gap 311 and is positioned in the cavity I241, a third cavity 34 is formed between the inner wall of the gap 311 and the outer wall corresponding to the lower end of the cylinder molding sand core II 4, a fourth cavity 35 is formed between the tappet core 33, the outer wall of the front end core 32 and the inner wall of the sand core body III 31, the third cavity 34 and the fourth cavity 35 form a cylinder molding cavity I, the upper end inner wall surfaces of the tappet core 33 and the fourth cavity 35 are flush and correspond to the top flange surface of the molding cylinder cover, the third cavity 34 is communicated with the second cavity 27, and the fourth cavity 35 is communicated with the first cavity 26.
The cylinder molding sand core II 4 comprises a sand core body IV 41, a cylinder core 43 and a riser core 42, wherein the sand core body IV 41 is integrally formed by 3D printing, the sand core body IV is arranged in a square hollow structure and is clamped at the upper end of the sand core body III 31, the cylinder core 43 is formed at the lower end of the sand core body IV 41 and is positioned in the cavity I241 through a gap 311, the riser core 42 is formed at the upper end of the sand core body IV 41, a cylinder molding cavity II 44 is formed between the riser core 42, the outer wall of the cylinder core 43 and the inner wall of the sand core body IV 41, and the cylinder molding cavity II 44 is respectively communicated with the third cavity 34 and the fourth cavity 35.
In some embodiments, the pouring assembly 5 includes a runner 51, a vertical runner 52 and an inner runner 53, where the runner 51 is clamped in the assembly slot 13, one end of the vertical runner 52 is communicated with the runner 51, the other end of the vertical runner is respectively and upwardly penetrating through the second sand core body 21, the third sand core body 31 and the fourth sand core body 41 to be located above the fourth sand core body 41, one end of the inner runner 53 is fixed and communicated with the upper end face of the runner 51, and the other end of the inner runner 53 is communicated with the first cavity 26.
Specifically, the pouring assembly 5 further includes a filter screen vertically mounted to the inner wall of the longitudinal runner 52.
Specifically, the casting ratio can be selected to be 1:2:2.5. The arrangement of the structure can provide enough molten metal supply on one hand, ensures the continuity of the casting process, has relatively larger size of the inner pouring gate on the other hand, can control the inflow speed of the molten metal, avoids the impact of the excessively fast flow speed on the sand core, has good air exhaust property for the open casting system, can smoothly exhaust the gas in the cavity, and avoids the defects of forming air holes and the like in castings. In the casting process, the flow of the molten metal is smoother, which is beneficial to improving the density and mechanical property of the casting.
Specifically, the casting assembly 5 further includes a bottle riser disposed within the riser core 42. The arrangement of the structure can provide extra molten metal in the solidification process of the casting, and the casting is fed, so that the defects of shrinkage cavity, shrinkage porosity and the like are prevented. The top of the flange can be placed under the action of gravity, so that molten metal in the riser can more easily flow into the part of the casting, which needs to be fed, the riser of the oil bottle can also play the roles of exhausting and collecting slag, and in the casting process, gas and impurities in the cavity can be discharged through the riser, so that the purity of the casting is improved.
In other specific embodiments, the sand core positioning device further comprises a guiding positioning assembly 6, the guiding positioning assembly 6 comprises a plurality of lugs 61 and a guiding rod 63, the lugs 61 are respectively integrally formed on two sides of the sand core body I11, the sand core body II 21, the sand core body III 31 and the sand core body IV 41, the lugs 61 on the same side are correspondingly arranged up and down, the lugs 61 are respectively provided with guiding holes 62, the guiding holes 62 on the same side are correspondingly arranged up and down, and the guiding rod 63 vertically penetrates through the guiding holes 62 on the same side to position the core assembly.
In other specific embodiments, the peripheral sides of the upper end surfaces of the first sand core body 11, the second sand core body 21 and the third sand core body 31 are recessed downward to form a frame-shaped recessed portion 7, and the lower end surfaces of the second sand core body 21, the third sand core body 31 and the fourth sand core body 41 are integrally formed with a clamping frame 8 matched with the recessed portion 7 at positions corresponding to the recessed portion 7.
The utility model provides an integrated casting model of a cylinder body and a cylinder cover, which comprises the following production steps:
① Drawing a rectangular block with the length of 1500mm multiplied by 800mm in three-dimensional software, wrapping the whole engine casting and pouring assembly, and obtaining a complete casting mold;
② The casting mould is further core-separated, namely a supporting sand core is obtained by core separation from the position of the lower end face of the cylinder cover, a cylinder cover forming sand core is obtained by core separation from the position of the top face of the water jacket of the cylinder sleeve, a cylinder body forming sand core I and a cylinder body forming sand core II are obtained by core separation from the position of the top flange face of the cylinder body;
③ The cylinder cover molding sand core is lifted by the lug of the cylinder cover molding sand core, so that the guide hole of the cylinder cover molding sand core penetrates through the guide rod to position and core the cylinder cover molding sand core, and the concave part at the upper end of the supporting sand core and the clamping frame at the lower end of the cylinder cover molding sand core are used for clamping, so that metal liquid is prevented from leaking from the parting surface in the casting process;
④ And (3) adhering a water gap at the upper end of the vertical pouring gate and the riser for pouring, and adopting a bare pouring mode.
According to the integrated casting model of the cylinder body and the cylinder cover, which is designed by the utility model, the support sand core is used for supporting, the cylinder cover molding sand core, the cylinder body molding sand core I and the cylinder body molding sand core II are used for integrally parting the cylinder cover of the cylinder body, the cylinder body and the cylinder cover do not need to be cast independently, the combination of the cylinder cover of the cylinder body and the cylinder cover can be cast directly, the core assembly molding process is simplified, the requirements on the skill level of field workers and the operation difficulty are reduced, the rejection rate of castings is further reduced, the production efficiency and the quality of castings of automobile engines are improved, and the choking generation of castings caused by the burning and exhausting of resin in the sand core in the casting pouring process is greatly reduced through the arrangement of the sand core exhaust holes, and the quality and the yield of castings are improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
Priority Applications (1)
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| CN202422393830.7U CN223129277U (en) | 2024-09-30 | 2024-09-30 | Integrated casting model of cylinder body and cylinder cover |
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| CN202422393830.7U CN223129277U (en) | 2024-09-30 | 2024-09-30 | Integrated casting model of cylinder body and cylinder cover |
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