Automobile engine end cover casting and manufacturing method

Abstract

The invention discloses an automobile engine end cover casting and a manufacturing method, and relates to the technical field of aluminum alloy end cover die casting. A steel cushion cylinder and a steel shaft sleeve are placed in a forming die cavity in advance, so that an end cover main body made of aluminum alloy, the steel cushion cylinder and the steel shaft sleeve are integrally formed; the automobile engine end cover has the advantages of being light in weight and firm in installation and use, meanwhile, the tooth groove is fixed to the guide column, the first gear meshed with the tooth groove is arranged in the column hole, the valve plate is slidably installed in the cavity communicated between the injection port and the forming cavity, connection of the transmission mechanism is matched, and the end cover is not prone to falling off during pressure casting production of the end cover. Along with pressurized injection of molten aluminum alloy, the first gear is driven to rotate, the guide column is driven to keep the trend of going deep into the column hole, auxiliary drawing is conducted on the four corners of the binding face of the first mold and the second mold, the mold closing leakproofness of the periphery of the mold is effectively improved, and improvement of the die-casting production quality of an end cover casting is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy end cover die-casting, and in particular to an automobile engine end cover casting and a manufacturing method thereof. Background Art

[0002] In the process of the automotive industry's continuous pursuit of high efficiency and low energy consumption, the engine, as a core component of the car, is of vital importance for its performance optimization. Among them, the engine end cover, as a key component of the engine, not only bears the responsibility of protecting the internal precision parts, but also participates in building the engine's sealing system. Therefore, in today's situation where lightweight design of automobiles has become the mainstream trend in the industry, the use of aluminum alloy materials for die-casting to manufacture automobile engine end covers is relatively widespread.

[0003] Engine end covers made of aluminum alloy can effectively reduce vehicle weight and energy consumption. However, the hardness of aluminum alloy cannot be compared with that of steel and cast iron, which makes the connection position of the engine end cover made of all-aluminum alloy relatively weak. During actual use, the connection parts are easily subjected to excessive force and wear or breakage, which affects their service life. In addition, when die-casting aluminum alloy end cover castings, since the mold is usually pressed at the center for mold closing production, the four corners of the mold are prone to insufficient clamping force. The larger the mold, the more obvious the above situation is, which makes it easy for burrs to appear on the edge of the end cover casting during die-casting. This not only affects the appearance quality of the product, but also increases the subsequent processing steps, resulting in production costs and production efficiency.

[0004] Therefore, an automobile engine end cover casting and a manufacturing method are proposed to solve some problems existing in the above-mentioned prior art. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art that the lightweight production of automobile engine end covers is made of all-aluminum alloy, resulting in poor hardness at the connection position, easy wear and breakage, and affecting the service life, and in the die-casting production process of the end cover, the mold pushing force is centered, resulting in insufficient clamping force at the edges around the end cover, resulting in burrs at the edges after the end cover is formed. A casting and a manufacturing method for an automobile engine end cover are proposed.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A casting device for an automobile engine end cover casting comprises a first mold and a second mold, wherein a molding cavity is arranged on the interface between the first mold and the second mold, an injection port connected to the molding cavity is provided on the first mold, columns fixedly connected to the second mold are evenly distributed in the molding cavity, and a mounting groove is provided on the second mold, column holes are provided at the four corners of the first mold, guide columns corresponding to the column holes are fixed at the four corners of the second mold, a tooth groove arranged parallel to the guide column is provided on the outer end wall of the guide column, a first gear meshing with the tooth groove is rotatably installed in the first mold, a cavity connected between the molding cavity and the injection port is provided in the first mold, and a valve plate adapted to the internal size thereof is slidably installed in the cavity, first baffles located outside the cavity are fixed on both sides of the valve plate, and a transmission mechanism is provided between the first baffle and the first gear, an exhaust channel is provided in the second mold, and micro air holes connected to the exhaust channel are provided around the periphery of the column and in the mounting groove.

[0007] Preferably, a spring fixedly connected to the top of the valve plate is installed at the upper position in the cavity, and the spring is used to elastically support the valve plate.

[0008] Preferably, the transmission mechanism includes a rotating shaft fixedly connected between two first gears on the same side, and a first bevel tooth is fixed on the rotating shaft, a rack parallel to the moving trajectory of the valve plate is fixed on the outer side of the first baffle, and a second gear is meshed on the rack, and a second bevel tooth meshed with the first bevel tooth is fixed on one side of the second gear.

[0009] Preferably, the length of the first baffle is set to be 2.5 times the height of the cavity, and a limiting plate that slides and presses on the outer side of the first baffle is fixedly installed in the first mold.

[0010] Preferably, the first mold is provided with a main injection channel connected to the cavity, and a plurality of injection side channels connected between the main injection channel and the molding cavity, the ports of some injection side channels point vertically into the molding cavity, and the ports of the remaining injection side channels point parallel to the molding cavity, and the inner diameter of the main injection channel gradually decreases in the direction away from the cavity.

[0011] Preferably, the main injection channel is connected at the lower position inside the cavity, a slot connected to the lower part of the cavity is opened in the first mold, and a second baffle plate fixedly connected to the valve plate is slidably inserted in the slot, the outer size of the second baffle plate is adapted to the internal size of the slot, and a docking hole corresponding to the main injection channel is opened at the lower end of the second baffle plate.

[0012] Preferably, a preheating cavity wrapped around the outside of the molding cavity is opened in the first mold, an oil storage cavity connected to the top of the cavity is opened in the first mold, and the oil storage cavity is connected to the bottom of the preheating cavity, the oil storage cavity is filled with heat transfer oil, the outside of the oil storage cavity is wrapped with a thermal insulation layer, an electric heating unit is arranged in the oil storage cavity, and an air guide mechanism connected to the top of the preheating cavity is arranged on the top of the first mold.

[0013] Preferably, the air guide mechanism includes a first air duct vertically opened at an upper position in the first mold and connected to the top of the preheating chamber, the top of the first air duct is connected to a valve chamber, a second air duct connected to the top of the valve chamber is opened at an upper position in the first mold, a third air duct connected between the upper position of the inner end wall of the valve chamber and the first air duct is opened in the first mold, a floating block matching the internal size of the valve chamber is slidably installed in the valve chamber, a first one-way valve is installed in the third air duct, a fourth air duct corresponding to the first air duct is opened in the floating block, and a second one-way valve is installed in the fourth air duct.

[0014] Preferably, a method for manufacturing an automobile engine end cover casting comprises the following steps: S1. Installation of steel cushion cylinders and steel sleeves: when the first mold and the second mold are in the open state, a plurality of steel cushion cylinders are respectively sleeved on a plurality of column rods, and the steel sleeves are placed in the installation groove; S2, auxiliary locking of the four corners. When the first mold and the second mold are in the mold-closed state, the aluminum alloy melt is pressurized and injected into the molding cavity through the injection port. Before the aluminum alloy melt is injected into the molding cavity, it will first push the valve plate to move in the cavity. With the help of the transmission mechanism to transmit power, the first gear is driven to rotate. Under the bite of the teeth between the first gear and the tooth groove, the guide column is driven to maintain the trend of continuing to move into the column hole, and the four corners of the first mold and the second mold are in the mold-closed state. The auxiliary locking is performed; S3, preheating around the molding cavity. The heat transfer oil in the oil storage cavity is in a high temperature state under the heating of the electric heating unit. When the valve plate is pushed and moved, the high temperature heat transfer oil in the oil storage cavity is pushed into the preheating cavity by extrusion. Before the aluminum alloy melt enters the molding cavity, the molding cavity is preheated. S4, die-casting of the casting. After the aluminum alloy melt is filled into the cavity, the aluminum alloy melt is evenly filled in the molding cavity through the connection of the main injection channel and the secondary injection channel, and the steel cushion cylinder and the steel sleeve are wrapped, and then cooled and formed to form the automobile engine end cover casting; S5, opening the mold and taking out the material. When the aluminum alloy melt at the injection port is released from pressurization and injected, the valve plate is reset, and along with the mold opening operation of the first mold and the second mold, the heat transfer oil in the preheating cavity is pumped back into the oil storage cavity, the preheating operation in the molding cavity is released, and then the molded automobile engine end cover casting is removed.

[0015] Preferably, an automobile engine end cover casting comprises an end cover body, and the edge position of the end cover body is inlaid with a plurality of evenly distributed steel gaskets by die-casting, the outer side of the steel gasket is surrounded and fixed with a coupling block, and the outer end wall of the steel gasket is provided with anti-slip edges and corners, the middle position of the end cover body is inlaid with a steel sleeve by die-casting, and the contact position between the outer side of the steel sleeve and the end cover body is provided with a plurality of surrounding grooves, and the steel gasket and the steel sleeve are made of hard steel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a steel cushion cylinder and a steel sleeve with a relatively hard texture are prefabricated and placed in the molding cavity in advance during the production process of the end cover, so that the aluminum alloy end cover body and the steel cushion cylinder and the steel sleeve are integrally formed, and the structural firmness of the end cover connection position is strengthened by the steel cushion cylinder and the steel sleeve. Under the condition of realizing the lightweight of the end cover, the firmness and wear resistance of the connection position can be guaranteed, so that the automobile engine end cover has the characteristics of both lightweight and firm installation and use. At the same time, by fixing the tooth groove on the guide column, setting the first gear meshing with the tooth groove in the column hole, and sliding the valve plate in the cavity connected between the injection port and the molding cavity, the connection of the transmission mechanism is coordinated. During the die-casting production of the end cover, along with the pressurized injection of the aluminum alloy melt, the first gear is driven to rotate, driving the guide column to maintain a trend of going deep into the column hole, and the four corners of the fitting surface of the first mold and the second mold are assisted to be pulled closer, effectively improving the airtightness of the surrounding mold, and thus facilitating the improvement of the quality of the die-casting production of the end cover casting; 2. In the present invention, by connecting a plurality of injection sub-channels to the injection main channel, and directing the ports of the plurality of injection sub-channels vertically into the molding cavity, or parallelly into the molding cavity, the aluminum alloy melt is injected more evenly. At the same time, during the parallel injection process, the injection length of the aluminum alloy melt after being filled into the molding cavity can be greatly increased, so that the aluminum alloy melt can be more efficiently, comprehensively and evenly filled into the molding cavity, which is beneficial to improving the die-casting production effect; 3. In the present invention, the preheating cavity is wrapped on the outside of the molding cavity, and an oil storage cavity connected to the bottom of the preheating cavity is connected above the cavity, and the electric heating unit in the oil storage cavity and the filled heat transfer oil are matched, so that when the first mold and the second mold are closed and the valve plate is driven to move upward, the heat transfer oil can enter the preheating cavity from bottom to top, and the molding cavity is wrapped by filling the heat transfer oil into the preheating cavity to realize the preheating operation of the molding cavity. With the cooperation of the air guide mechanism, when the mold is opened, the heat transfer oil is pumped back into the oil storage cavity to realize heating interruption, which is convenient for demoulding and material removal, and the operation is convenient, which is conducive to improving the flexibility and efficiency of the die-casting production of the end cover casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a three-dimensional diagram of the present invention when the mold is opened; Figure 2 A three-dimensional diagram of the steel cushion cylinder and the steel sleeve of the present invention pre-installed in the forming cavity; Figure 3 is a three-dimensional diagram of the transmission mechanism of the present invention; Figure 4 A three-dimensional diagram of the valve plate, the second baffle plate and the docking hole of the present invention; Figure 5 It is a top view of the present invention in the mold closing state; Figure 6 For the present invention Figure 5 Sectional view at AA in the middle; Figure 7 For the present invention Figure 5 Sectional view at the middle BB; Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle; Fig. 9 It is a left side view of the present invention in the mold closing state; Fig.10 For the present invention Fig. 9 Sectional view at DD in the middle; Fig.11 For the present invention Fig. 9 Sectional view at EE; Fig.12 is a three-dimensional diagram of the end cover casting of the present invention; Fig.13 It is a disassembled diagram of the end cover casting of the present invention.

[0018] Serial number in the picture: 1. First mold; 101. Second mold; 102. Molding cavity; 103. Injection port; 104. Column; 105. Mounting groove; 106. Column hole; 107. Guide column; 2. tooth groove; 201. first gear; 202. cavity; 203. valve plate; 204. spring; 205. first baffle; 206. slot; 207. second baffle; 208. docking hole; 3. Rotating shaft; 301. First bevel gear; 302. Rack; 303. Second gear; 304. Second bevel gear; 305. Limiting plate; 4. Main injection channel; 401. Secondary injection channel; 5. Preheating chamber; 501. Oil storage chamber; 502. Insulation layer; 6. First air channel; 601. Valve chamber; 602. Second air channel; 603. Third air channel; 604. Float; 605. First one-way valve; 606. Fourth air channel; 607. Second one-way valve; 7. Air extraction channel; 8. End cover body; 801. Steel cushion cylinder; 802. Steel shaft sleeve; 803. Groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Embodiment 1: This embodiment provides an automobile engine end cover casting, see Fig.12 - Fig.13 Specifically, the end cover casting includes an end cover body 8, and the edge position of the end cover body 8 is inlaid with a plurality of uniformly distributed steel washers 801 by die-casting, the outer side of the steel washers 801 is surrounded and fixed with a coupling block, and the outer end wall of the steel washers 801 is provided with anti-slip edges and corners, and the middle position of the end cover body 8 is inlaid with a steel sleeve 802 by die-casting, and the outer side of the steel sleeve 802 is provided with a plurality of surrounding grooves 803 at the contact position with the end cover body 8, and the steel washers 801 and the steel sleeve 802 are made of hard steel.

[0021] When the end cover casting is in use, it is installed at the end of the automobile engine to seal the automobile engine. The end cover casting is firmly connected to the automobile engine through bolts. The bolts are inserted in the steel washer 801. During the process of rotating the bolts to tighten, the end of the bolts is squeezed on the steel washer 801. The steel washer 801 is used to withstand the extrusion force applied when the bolts are tightened, so as to avoid the end cover body 8 with poor hardness directly bearing the extrusion force of the bolts. The stability of the end cover casting when installed at the end of the automobile engine can be effectively guaranteed. The drive shaft in the automobile engine is inserted in the steel sleeve 802. The steel sleeve 802 is used as the insertion hole of the drive shaft, which is more firm and durable.

[0022] The end cover body 8 of the end cover casting is formed by aluminum alloy die-casting, which has the characteristics of lightness and firmness. The steel washer 801 and the steel sleeve 802 are pre-manufactured and die-cast and embedded in the end cover body 8 for the installation of bolts and drive shafts. Since the hardness of the steel washer 801 and the steel sleeve 802 is much greater than that of the aluminum alloy end cover body 8, the firmness and stability of the surrounding structure of the bolts and the drive shaft can be effectively improved, and the probability of damage to the end cover casting during installation and use can be reduced. At the same time, the end cover body 8 of most of the main body is formed by aluminum alloy die-casting with a lighter texture, and the steel washer 801 and the steel sleeve 802, which only occupy a small part of the space, are supported by heavier steel materials. Compared with the prior art that uniformly uses aluminum alloy materials to manufacture the entire end cover casting, or uniformly uses steel materials or cast iron to manufacture the entire end cover casting, the end cover casting in the present application has the characteristics of both lightness and firm installation and use, is suitable for installation at the end of an automobile engine, and is widely promoted and used.

[0023] By providing a coupling block and anti-slip edges on the outer side of the steel washer 801 in the end cover casting, when the steel washer 801 is embedded in the end cover body 8 by die-casting, the connection between the steel washer 801 and the end cover body 8 is more firmly, and the steel washer 801 will not rotate relative to the end cover body 8. Similarly, by providing a groove 803 around the outer side of the steel sleeve 802, when the steel sleeve 802 is embedded in the end cover body 8 by die-casting, the aluminum alloy melt forming the end cover body 8 will fill the groove 803 around the outer side of the steel sleeve 802, thereby achieving a firm connection between the end cover body 8 and the steel sleeve 802, effectively preventing the steel sleeve 802 from detaching from the end cover body 8, and preventing the steel sleeve 802 from rotating relative to the end cover body 8, thereby improving the structural stability of the end cover casting to a certain extent.

[0024] Embodiment 2: Based on Embodiment 1, this embodiment further includes: a casting device for an automobile engine end cover casting, the casting device is used for the production of the automobile engine end cover casting in Embodiment 1, referring to Figure 1 - Fig.13 Specifically, it includes a first mold 1 and a second mold 101, a molding cavity 102 is provided on the connecting surface of the first mold 1 and the second mold 101, an injection port 103 connected to the molding cavity 102 is opened on the first mold 1, pillars 104 fixedly connected to the second mold 101 are evenly distributed in the molding cavity 102, and a mounting groove 105 is opened on the second mold 101, pillar holes 106 are opened at the four corners of the first mold 1, guide pillars 107 corresponding to the pillar holes 106 are fixed at the four corners of the second mold 101, an exhaust channel 7 is opened in the second mold 101, and micro air holes connected to the exhaust channel 7 are opened around the periphery of the pillar 104 and the mounting groove 105.

[0025] When the device is used, the staff can use the casting equipment to perform die-casting production on the end cover casting. The staff installs the first mold 1 and the second mold 101 on the die-casting machine, and controls the first mold 1 and the second mold 101 to perform the mold opening operation through the die-casting machine. In the mold opening state, the staff sets the pre-made steel cushion cylinder 801 on the many pillars 104 one by one, and places the pre-made steel sleeve 802 in the installation groove 105. This step can be manually operated by the staff or by a robot. The air pump is externally connected to the air pump through the air extraction channel 7. , the exhaust operation is performed in the exhaust channel 7. Since micro-air holes connected to the exhaust channel 7 are arranged around the periphery of the column 104 and the installation groove 105, there will be air suction at these micro-air holes under the flow connection of the air flow. With the help of the negative pressure adsorption formed by the air suction, the steel cushion cylinder 801 can be firmly sleeved on the column 104, and the steel sleeve 802 can also be firmly embedded in the installation groove 105. After the steel cushion cylinder 801 and the steel sleeve 802 are pre-installed in place, the corresponding micro-air holes are all in a shielded state.

[0026] The outer end wall of the guide column 107 is provided with a tooth groove 2 arranged parallel to the guide column 107, a first gear 201 meshing with the tooth groove 2 is rotatably installed in the first mold 1, a cavity 202 connected between the molding cavity 102 and the injection port 103 is provided in the first mold 1, and a valve plate 203 adapted to the internal size thereof is slidably installed in the cavity 202, a spring 204 fixedly connected to the top of the valve plate 203 is installed in the upper position of the cavity 202, and the spring 204 is used to elastically support the valve plate 203, and both sides of the valve plate 203 are fixed There is a first baffle 205 located outside the cavity 202, and a transmission mechanism is arranged between the first baffle 205 and the first gear 201, the transmission mechanism includes a rotating shaft 3 fixedly connected between the two first gears 201 on the same side, and a first bevel tooth 301 is fixed on the rotating shaft 3, a rack 302 parallel to the moving trajectory of the valve plate 203 is fixed on the outside of the first baffle 205, and a second gear 303 is meshed on the rack 302, and a second bevel tooth 304 meshing with the first bevel tooth 301 is fixed on one side of the second gear 303.

[0027] When the device is used, after the steel cushion cylinder 801 and the steel sleeve 802 are pre-installed in place, the staff operates the die-casting machine to control the first mold 1 and the second mold 101 to close the molds and prepare for production. In the closed mold state, the guide column 107 will be inserted into the corresponding column hole 106. Along with the insertion of the guide column 107, with the help of the meshing of the tooth groove 2 and the first gear 201, and the transmission of power by the transmission mechanism, the first baffle 205 will drive the valve plate 203 to move up a distance in the cavity 202. After the first mold 1 and the second mold 101 are completely fitted, the valve plate 203 is in a relatively stable state. Then, the staff can inject the aluminum alloy melt through the injection port 103.

[0028] The molten aluminum alloy is pressurized and injected into the cavity 202. With the support formed by the continuous injection of the molten aluminum alloy into the cavity 202, the valve plate 203 is pushed to continue to move upward in the cavity 202 until the position in which the cavity 202 communicates with the molding cavity 102 is exposed. During this process, the valve plate 203 drives the first baffle plate 205 to move upward, so that the first baffle plate 205 drives the rack 302 fixedly connected to its outer side to move upward, and with the meshing of the rack 302 and the second gear 303, the second gear 303 drives the second bevel gear 304 to rotate, and then with the meshing reversing of the second bevel gear 304 and the first bevel gear 301, the rotational power is transmitted to the rotating shaft 3, driving the first gear connected to the end of the rotating shaft 3. 201 rotates further, and under the meshing of the first gear 201 and the tooth groove 2, the guide column 107 is pulled further into the column hole 106, and during the pressurized injection of the aluminum alloy melt, the trend of continuously pulling the multiple guide columns 107 at the four corners of the second mold 101 is maintained, so that the four corners of the second mold 101 are further attached to the four corners of the first mold 1. Compared with the operation in the prior art that only the extrusion force is applied to the middle position of the first mold 1 and the second mold 101 when closing the mold, the technical method in the present application can effectively improve the mold sealing around the first mold 1 and the second mold 101 during the die-casting production of the end cover casting, reduce the probability of burrs at the mold closing position, and is beneficial to improving the quality of the die-casting production of the end cover casting.

[0029] The molten aluminum alloy eventually enters the molding cavity 102 through the cavity 202, gradually fills the molding cavity 102, wraps the steel cushion cylinder 801 and the steel shaft sleeve 802, and forms an automobile engine end cover casting after cooling and shaping. Then the mold is opened to take out the material. After the first mold 1 and the second mold 101 are opened, the valve plate 203 is reset to the initial state in the cavity 202. Through the reset movement of the valve plate 203, the excess molten aluminum alloy in the cavity 202 can be pushed to flow back, which is beneficial to reduce the waste of molten aluminum alloy.

[0030] In the specific implementation process, Figure 3 , Figure 4 and Figure 6As shown, the length of the first baffle 205 is set to 2.5 times the height of the cavity 202. A limit plate 305 is fixedly installed in the first mold 1 to slide and press on the outside of the first baffle 205. When the device is used, the front and rear sides of the cavity 202 are set as a through structure. The first baffle 205 is set on the outside of the cavity 202, and is slidably connected to the front and rear sides of the cavity 202, and blocks the front and rear sides of the cavity 202, so that a relatively sealed space is formed in the cavity 202. By setting the length of the first baffle 205 to It is set to 2.5 times the height of the cavity 202, so that when the valve plate 203 drives the first baffle plate 205 to slide up and down, the first baffle plate 205 can always stably block the front and rear sides of the cavity 202. At the same time, by installing a limit plate 305 on the outside of the first baffle plate 205 to press and limit the first baffle plate 205, the first baffle plate 205 is more closely fitted to the front and rear sides of the cavity 202, which is beneficial to ensuring the stability of the first baffle plate 205 sliding up and down to close the front and rear sides of the cavity 202.

[0031] In the specific implementation process, Figure 4 and Figure 6 As shown, a main injection channel 4 connected to the cavity 202 and a plurality of injection side channels 401 connected between the main injection channel 4 and the molding cavity 102 are provided in the first mold 1, ports of some injection side channels 401 are perpendicularly directed into the molding cavity 102, and ports of other injection side channels 401 are parallelly directed into the molding cavity 102, the inner diameter of the main injection channel 4 in the direction away from the cavity 202 is gradually reduced, the main injection channel 4 is connected to the lower position inside the cavity 202, a slot 206 connected to the lower part of the cavity 202 is provided in the first mold 1, and a second baffle 207 fixedly connected to the valve plate 203 is slidably inserted in the slot 206, the outer size of the second baffle 207 is adapted to the inner size of the slot 206, and a docking hole 208 corresponding to the main injection channel 4 is provided at the lower end of the second baffle 207.

[0032] When the device is used, the aluminum alloy melt is pressurized and injected into the cavity 202 through the injection port 103. As the aluminum alloy melt is injected into the cavity 202, the valve plate 203 is pushed up, and the second baffle plate 207 is synchronously raised during the rising process of the valve plate 203, so that the docking hole 208 opened on the second baffle plate 207 is aligned with the main injection channel 4. Then, the aluminum alloy melt enters the main injection channel 4 through the connection of the docking hole 208, is transported through the main injection channel 4, and finally is injected into the molding cavity 102 through the diversion of many injection sub-channels 401. During the injection of the aluminum alloy melt, the injection direction of the aluminum alloy melt is perpendicular or parallel to the narrow and long space in the molding cavity 102, such as Figure 6As shown in the figure, the upper injection sub-channel 401 is aligned with the upper vertical thin space in the molding cavity 102, and the aluminum alloy melt can be injected from top to bottom along the vertical thin space. The lower injection sub-channel 401 is aligned with the lower annular thin space in the molding cavity 102, and the aluminum alloy solution can be injected from left to right along the annular thin space, which greatly improves the injection length of the aluminum alloy melt after being filled into the molding cavity 102, so that the aluminum alloy melt can be filled into the molding cavity 102 more efficiently, comprehensively and evenly.

[0033] In the specific implementation process, Figure 6 - Figure 8 As shown, a preheating cavity 5 wrapped around the outside of the molding cavity 102 is provided in the first mold 1, an oil storage cavity 501 connected to the top of the cavity 202 is provided in the first mold 1, and the oil storage cavity 501 is connected to the bottom of the preheating cavity 5, the oil storage cavity 501 is filled with heat transfer oil, the outside of the oil storage cavity 501 is wrapped with a temperature insulation layer 502, an electric heating unit is arranged in the oil storage cavity 501, and an air guide mechanism connected to the top of the preheating cavity 5 is arranged on the top of the first mold 1, and the air guide mechanism includes a first air channel 6 vertically opened in the upper position of the first mold 1 and connected to the top of the preheating cavity 5, The top of the first air channel 6 is connected to a valve chamber 601, a second air channel 602 connected to the top of the valve chamber 601 is opened at an upper position in the first mold 1, a third air channel 603 connected between the upper position of the inner end wall of the valve chamber 601 and the first air channel 6 is opened in the first mold 1, a floating block 604 adapted to the internal size of the valve chamber 601 is slidably installed in the valve chamber 601, a first one-way valve 605 is installed in the third air channel 603, a fourth air channel 606 corresponding to the first air channel 6 is opened in the floating block 604, and a second one-way valve 607 is installed in the fourth air channel 606.

[0034] When the device is in use, an electric heating unit is provided in the oil storage chamber 501, which can heat the heat transfer oil filled in the oil storage chamber 501 to ensure that the heat transfer oil is in a high temperature state. After the mold closing process of the device, the valve plate 203 is driven to move upward in the cavity 202, and is connected through the channel. The space above the valve plate 203 inside the cavity 202 and the heat transfer oil filled in the oil storage chamber 501 can be pushed into the preheating chamber 5, and the heat transfer oil enters the preheating chamber 5 from bottom to top. In the process of the heat transfer oil entering the preheating chamber 5, the gas originally existing in the preheating chamber 5 can be discharged through the air guide mechanism connected above the preheating chamber 5 to ensure the stability of the heat transfer oil filled in the preheating chamber 5. The molding cavity 102 is wrapped by the heat transfer oil filled in the preheating chamber 5, and the molding cavity 102 can be preheated by means of the high temperature of the heat transfer oil.

[0035] During the process of the heat transfer oil being filled into the preheating chamber 5 from bottom to top, the gas originally existing in the preheating chamber 5 will be pushed to flow upward and enter the first air channel 6. Since the upper end of the first air channel 6 is blocked by the floating block 604, the gas passes through the third air channel 603 and crosses the first one-way valve 605 to enter the valve chamber 601, and is finally discharged through the second air channel 602. The restriction of the first one-way valve 605 allows the gas flow to flow only from the third air channel 603 to the valve chamber 601. The restriction of the second one-way valve 607 allows the gas flow to flow only from the valve chamber 601 to the first air channel 6 through the fourth air channel 606. When the heat transfer oil in the preheating chamber 5 is full, it will enter the first air channel 6. With the continuous rise of the heat transfer oil, the float 604 will float up synchronously with the heat transfer oil, and finally the float 604 will float to the upper position in the valve chamber 601, and the connection position between the third air channel 603 and the valve chamber 601 will be blocked. The second one-way valve 607 is one-way closed, and the heat transfer oil cannot flow upward through the fourth air channel 606. In this state, the heat transfer oil filled in the preheating chamber 5 will not overflow through the second air channel 602, thereby ensuring the stability of the device in preheating the molding cavity 102 through the heat transfer oil in the preheating chamber 5.

[0036] When the production is completed and the mold is opened for material collection, the guide column 107 withdraws from the column hole 106, so that the valve plate 203 moves down and resets in the cavity 202, and the heat transfer oil filled in the preheating chamber 5 is pumped back into the oil storage chamber 501. During this process, external gas can enter through the second air channel 602, and then through the one-way opening of the second one-way valve 607, pass through the fourth air channel 606 to enter the preheating chamber 5, to ensure the stability of the heat transfer oil in the preheating chamber 5 being pumped back to the oil storage chamber 501. After the heat transfer oil in the preheating chamber 5 is pumped back to the oil storage chamber 501, the molding chamber 102 is no longer heated, so that the end cover casting formed in the molding chamber 102 can be quickly cooled down, which is convenient for demolding and material collection operations.

[0037] Specifically, the working principle and operation method of the present invention are as follows: When the first mold 1 and the second mold 101 are in the open state, a plurality of steel cushion cylinders 801 are respectively sleeved on a plurality of column rods 104, and a steel shaft sleeve 802 is placed in the mounting groove 105. When the first mold 1 and the second mold 101 are in the closed state, aluminum alloy melt is pressurized and injected into the molding cavity 102 through the injection port 103. Before the aluminum alloy melt is injected into the molding cavity 102, the valve plate 203 is pushed to move in the cavity 202. With the help of the transmission mechanism to transmit power, the first gear 201 is driven to rotate. Under the engagement of the teeth between the first gear 201 and the tooth groove 2, the guide column 107 is driven to maintain a trend of continuing to move into the column hole 106, and the four corner positions of the first mold 1 and the second mold 101 in the closed state are auxiliary locked. Synchronously, the heat transfer oil in the oil storage cavity 501 is in a high temperature state under the heating of the electric heating unit. When the valve plate 203 is pushed to move, the oil storage cavity 501 The high-temperature heat transfer oil in the preheating chamber 5 is pushed into the preheating chamber 5 by extrusion. Before the aluminum alloy melt enters the molding chamber 102, the molding chamber 102 is preheated. After the aluminum alloy melt fills the cavity 202, the aluminum alloy melt is finally evenly filled in the molding chamber 102 through the connection of the main injection channel 4 and the injection sub-channel 401. After the steel cushion cylinder 801 and the steel shaft sleeve 802 are wrapped, the automobile engine end cover casting is formed, and the pressurized injection operation of the aluminum alloy melt at the injection port 103 is released, so that the valve plate 203 is reset, and accompanied by the mold opening operation of the first mold 1 and the second mold 101, the heat transfer oil in the preheating chamber 5 is drawn back to the oil storage chamber 501, and the preheating operation in the molding chamber 102 is released. Finally, the automobile engine end cover casting formed in the opened molding chamber 102 is taken out, and the production operation of the automobile engine end cover casting made of the main aluminum alloy is completed.

[0038] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A casting device for an automobile engine end cover casting, comprising a first mold (1) and a second mold (101), characterized in that: A molding cavity (102) is provided at the interface between the first mold (1) and the second mold (101); a material injection port (103) is provided on the first mold (1); pillars (104) fixedly connected to the second mold (101) are evenly distributed in the molding cavity (102); and mounting grooves (105) are provided on the second mold (101); pillar holes (106) are provided at the four corners of the first mold (1); guide pillars (107) are fixed at the four corners of the second mold (101); tooth grooves (2) are provided on the outer end walls of the guide pillars (107); a rotating mounting hole (106) is provided in the first mold (1). A first gear (201) meshing with the tooth groove (2) is provided in the first mold (1), a cavity (202) connected between the molding cavity (102) and the injection port (103) is provided in the first mold (1), and a valve plate (203) is slidably installed in the cavity (202), first baffles (205) are fixed on both sides of the valve plate (203), and a transmission mechanism is provided between the first baffle (205) and the first gear (201), an exhaust channel (7) is provided in the second mold (101), and micro air holes connected to the exhaust channel (7) are provided around the periphery of the column rod (104) and in the installation groove (105).

2. The automobile engine end cover casting equipment according to claim 1, characterized in that: A spring (204) fixedly connected to the top of the valve plate (203) is installed at the upper position in the cavity (202), and the spring (204) is used to elastically support the valve plate (203).

3. The automobile engine end cover casting equipment according to claim 1, characterized in that: The transmission mechanism comprises a rotating shaft (3) fixedly connected between two first gears (201) on the same side, and a first bevel tooth (301) is fixed on the rotating shaft (3); a rack (302) parallel to the moving track of the valve plate (203) is fixed on the outer side of the first baffle (205), and a second gear (303) is meshed on the rack (302); and a second bevel tooth (304) meshing with the first bevel tooth (301) is fixed on one side of the second gear (303).

4. The automobile engine end cover casting equipment according to claim 3, characterized in that: The length of the first baffle (205) is set to 2.5 times the height of the cavity (202), and a limit plate (305) is fixedly installed in the first mold (1) and is slidably pressed on the outside of the first baffle (205).

5. The automobile engine end cover casting equipment according to claim 1, characterized in that: The first mold (1) is provided with a main injection channel (4) connected to the cavity (202), and a plurality of secondary injection channels (401) connected between the main injection channel (4) and the molding cavity (102); ports of some of the secondary injection channels (401) point vertically into the molding cavity (102), and ports of the remaining secondary injection channels (401) point parallel to the molding cavity (102); the inner diameter of the main injection channel (4) decreases step by step in a direction away from the cavity (202).

6. The automobile engine end cover casting equipment according to claim 5, characterized in that: The main injection channel (4) is connected to a lower position inside the cavity (202); a slot (206) connected to the lower part of the cavity (202) is provided in the first mold (1); a second baffle (207) fixedly connected to the valve plate (203) is slidably inserted in the slot (206); a docking hole (208) corresponding to the main injection channel (4) is provided at the lower end of the second baffle (207).

7. The automobile engine end cover casting equipment according to claim 1, characterized in that: The first mould (1) is provided with a preheating cavity (5) wrapped around the outside of the moulding cavity (102); the first mould (1) is provided with an oil storage cavity (501) connected to the top of the cavity (202); the oil storage cavity (501) is connected to the bottom of the preheating cavity (5); the oil storage cavity (501) is filled with heat transfer oil; the outside of the oil storage cavity (501) is wrapped with a temperature insulation layer (502); an electric heating unit is arranged in the oil storage cavity (501); and the top of the first mould (1) is provided with an air guide mechanism connected to the top of the preheating cavity (5).

8. The automobile engine end cover casting equipment according to claim 7, characterized in that: The air guide mechanism comprises a first air channel (6) vertically opened at an upper position in the first mold (1) and connected to the top of the preheating chamber (5); the top of the first air channel (6) is connected to a valve chamber (601); a second air channel (602) is opened through the upper position in the first mold (1) and connected to the top of the valve chamber (601); a third air channel (603) is opened in the first mold (1) and connected between the upper position of the inner end wall of the valve chamber (601) and the first air channel (6); a floating block (604) is slidably installed in the valve chamber (601); a first one-way valve (605) is installed in the third air channel (603); a fourth air channel (606) is opened in the floating block (604) and connected to the first air channel (6); and a second one-way valve (607) is installed in the fourth air channel (606).

9. A method for manufacturing an automobile engine end cover casting, characterized in that: The manufacturing method uses the automobile engine end cover casting equipment according to any one of claims 1 to 8, and the manufacturing method comprises the following steps: S1, installation of the steel cushion cylinder (801) and the steel shaft sleeve (802), in the open state of the first mold (1) and the second mold (101), a plurality of steel cushion cylinders (801) are respectively sleeved on a plurality of column rods (104), and the steel shaft sleeve (802) is placed in the installation groove (105); S2, auxiliary locking of the four corner positions. When the first mold (1) and the second mold (101) are in a closed state, aluminum alloy melt is pressurized and injected into the molding cavity (102) through the injection port (103). Before the aluminum alloy melt is injected into the molding cavity (102), it will first push the valve plate (203) to move in the cavity (202). With the help of the transmission mechanism to transmit power, the first gear (201) is driven to rotate. Under the bite of the teeth between the first gear (201) and the tooth groove (2), the guide column (107) is driven to maintain a trend of continuing to move into the column hole (106), thereby auxiliary locking of the four corner positions of the first mold (1) and the second mold (101) in the closed state; S3, preheating the periphery of the molding cavity (102), the heat transfer oil in the oil storage cavity (501) is in a high temperature state under the heating of the electric heating unit, and when the valve plate (203) is pushed and moved, the high temperature heat transfer oil in the oil storage cavity (501) is pushed into the preheating cavity (5) by extrusion, and the molding cavity (102) is preheated before the aluminum alloy melt enters the molding cavity (102); S4, die-casting the casting, after the aluminum alloy melt is filled into the cavity (202), the aluminum alloy melt is finally evenly filled into the molding cavity (102) through the connection between the main injection channel (4) and the secondary injection channel (401), and the steel cushion cylinder (801) and the steel shaft sleeve (802) are wrapped, and then cooled and formed to form the automobile engine end cover casting; S5, opening the mold and taking out the material. When the aluminum alloy melt at the injection port (103) is released from the pressurized injection, the valve plate (203) is reset, and along with the mold opening operation of the first mold (1) and the second mold (101), the heat transfer oil in the preheating chamber (5) is drawn back into the oil storage chamber (501), and the preheating operation in the molding chamber (102) is released, and then the molded automobile engine end cover casting is removed.

10. An automobile engine end cover casting, characterized in that: The end cover casting is produced by the manufacturing method of the automobile engine end cover casting as claimed in claim 9, the end cover casting comprises an end cover body (8), and the edge position of the end cover body (8) is inlaid with a plurality of uniformly distributed steel gaskets (801) by die casting, the outer side of the steel gasket (801) is surrounded and fixed with a coupling block, and the outer end wall of the steel gasket (801) is provided with anti-slip edges and corners, the middle position of the end cover body (8) is inlaid with a steel sleeve (802) by die casting, and the contact part between the outer side of the steel sleeve (802) and the end cover body (8) is provided with a plurality of surrounding grooves (803), and the steel sleeve (801) and the steel sleeve (802) are made of hard steel.

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