A turbocharger housing casting mold

Abstract

This invention relates to the field of mold technology and discloses a worm gear turbocharger housing casting mold, including a base. The invention features an alternating pushing mechanism, which generates intermittent, dispersed pushing forces on the outer mold sand mold and casting within the mold cavity. This avoids casting deformation or sand mold adhesion problems caused by excessive localized force during traditional pushing, significantly reducing casting damage rates and improving finished product yield. Simultaneously, the adjusting roller drives the bottom plate and synchronous plate to move the top plate downwards, achieving initial separation of the top plate, bottom plate, lower mold, and upper mold sidewalls. This allows the four sides of the upper mold to detach from the outer mold sand mold and casting. After the sidewalls are separated, the outer convex rail and push rod work together to drive the top plate to alternately push and separate the top of the casting, gradually releasing the adhesion between the top and the outer mold sand mold. The entire process proceeds in the order of sidewall separation first, followed by alternating top separation, avoiding the problem of concentrated separation resistance caused by simultaneous adhesion on multiple sides of the mold.

Description

Technical Field

[0001] This invention belongs to the field of mold technology, specifically, it relates to a casting mold for a worm gear turbocharger housing. Background Technology

[0002] In the casting production of turbocharger housings, the demolding process is a crucial step in ensuring both casting quality and production efficiency. Because turbocharger housings require complex structures such as vortex air passages and cooling water channels, their casting molds must be designed with multi-faceted, closely fitting cavities to ensure casting accuracy. This makes it easy for the upper mold, outer sand mold, and the four sides and top of the casting to adhere tightly, resulting in concentrated adhesion resistance during demolding.

[0003] Currently, demolding operations for this type of housing casting typically require the upper mold to be hoisted first, while the vibration force generated by the vibration motor assists in separating the adhered parts. However, the separation resistance caused by multi-faceted adhesion is highly concentrated. Even with vibration assistance, significant resistance still needs to be overcome to complete the demolding. This not only makes the operation very inconvenient, significantly increasing the difficulty and time cost, but also easily interferes with the special structure of the turbocharger housing, which has thin walls and uneven wall thickness, during forced separation or vibration transmission. This can lead to defects such as casting cracks and scratches, making it difficult to meet the high-precision and high-efficiency casting production requirements of turbocharger housings.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A casting mold for a worm gear turbocharger housing, comprising a base.

[0006] A lower mold is installed on the base. A base plate is movably inserted into the bottom of the lower mold. An upper mold is covered on the lower mold. A synchronization plate is slidably installed on the upper mold. Several pairs of alternately sliding top plates are vertically slidably arranged at the bottom of the synchronization plate. The bottom of the several pairs of top plates is placed inside the upper mold. A rod is installed on the top plate. The rod movably passes through the synchronization plate. The synchronous plate is slidably provided with several pairs of push rods. The end of each push rod is connected to a guide plate fixedly installed on the upper mold. Each guide plate is equipped with a guide rail, and adjacent guide rails are equipped with external convex rails of different heights. The external convex rails are used to drive the top plate to move alternately during the downward movement of the synchronous plate, which facilitates demolding. A connecting plate is installed on the side wall of the synchronization plate, and the connecting plate is movably connected to the connecting frame installed on the base plate; An adjusting roller is rotatably mounted on the base, and a guide block is mounted on the adjusting roller. One end of the guide block has an inclined surface. The guide block is used to press the positioning rod set on the connecting frame into the connecting plate. The top plate and the bottom plate are vertically aligned. A combination groove is opened on the adjusting roller, and the combination groove includes a lifting groove and a lowering groove. The lifting groove is adapted to the inclined surface, and the lowering groove is a spiral groove. A slider is slidably mounted on the combination groove, and the slider is used to drive the bottom plate and the top plate to move down synchronously for demolding.

[0007] In a preferred embodiment of the present invention, four support legs are installed on the base. The four support legs are T-shaped. The bottom of the support legs is connected to the bottom of the lower mold. Mounting ears are provided on the side wall between the lower mold and the upper mold, and the mounting ears fit together. Mounting holes are provided between the mounting ears to facilitate connection. Anti-slip pads are installed on the bottom of the base.

[0008] In a preferred embodiment of the present invention, the cavity enclosed by the lower mold and the upper mold is filled with an outer mold sand mold, the outer mold sand mold has a mold cavity inside, the mold cavity has an inner mold sand mold inside, the outer mold sand mold and the inner mold sand mold are made of different materials, and a pouring hole is provided on the top plate, and the pouring hole is connected to the mold cavity.

[0009] In a preferred embodiment of the present invention, a plate is installed on the top of the insertion rod, the cross-section of the plate is larger than the cross-section of the insertion rod, and a compression spring is sleeved on the outer wall of the insertion rod. One end of the compression spring is engaged with the bottom of the synchronization plate, and the other end of the compression spring is engaged with the bottom of the plate.

[0010] In a preferred embodiment of the present invention, a guide seat is movably inserted into the outer wall of the top rod, the bottom of the guide seat is mounted on a synchronous plate, a rocker arm is rotatably mounted on the side wall of the top rod, the end of the rocker arm is rotatably connected to the lower surface of the insert plate, the rocker arm is in an inclined state, a notch is opened at the end of the top rod, and the notch is slidably connected to the guide plate, a protrusion is installed at the notch, and the protrusion is slidably connected to the guide rail, the outer protruding rail synchronously presses the top rod to slide inward, and drives the insert plate and the insert rod to move upward through the rocker arm.

[0011] In a preferred embodiment of the present invention, the connecting frame is L-shaped, and a positioning rod is movably inserted into the end of the connecting frame. A positioning hole is opened at the bottom of the connecting plate, and the positioning hole is located below the connecting frame. The positioning rod is movably inserted into the positioning rod. A positioning plate is installed at one end of the positioning rod, and a positioning spring is sleeved on the positioning rod. One end of the positioning spring is snapped onto the positioning plate, and the other end of the positioning spring is snapped onto the side wall of the connecting frame.

[0012] In a preferred embodiment of the present invention, a pressure plate is installed on the positioning rod, the pressure plate and the positioning plate are in close contact with each other, a pressure rod is installed at the center of the pressure plate, the extension line of the pressure rod intersects the rotation center of the adjusting roller, a ball is installed at the end of the pressure rod, and the ball is in rolling contact with the surface of the guide block.

[0013] In a preferred embodiment of the present invention, a synchronous shaft is installed at the rotation center of the adjusting roller, a fixed frame is rotatably mounted on the synchronous shaft, the bottom of the fixed frame is mounted on a base, a drive motor is mounted on the fixed frame, and the output end of the drive motor is connected to the synchronous shaft.

[0014] In a preferred embodiment of the present invention, a limiting rod is installed on the fixing frame, the limiting rod is slidably connected to the slider, a synchronization frame is installed on the slider, the synchronization frame is a bent rod, and the bottom of the synchronization frame is connected to the base plate.

[0015] In a preferred embodiment of the present invention, the lifting groove is a horizontal groove, and the central angle of the projection pattern of the guide block along the axial direction of the adjusting roller is smaller than the central angle of the projection pattern of the lower sliding groove along the axial direction of the adjusting roller, so as to ensure that when the slider slides in the lower sliding groove, the connecting plate and the connecting frame are sequentially driven to lock and unlock.

[0016] Compared with the prior art, the present invention has the following advantages: This invention utilizes externally protruding rails of varying heights on the guide plate to cause the ejector rods to slide alternately during the overall downward movement. The linkage between the insert plate and the insert rods drives several pairs of ejector plates to move alternately upwards. This alternating pushing method generates intermittent, dispersed pushing forces on the outer mold sand and casting within the mold cavity. This avoids the casting deformation or sand mold adhesion problems caused by excessive localized stress during traditional pushing methods. Especially for the thin-walled, unevenly thick structure of turbocharger housings, it effectively reduces defects such as cracks and scratches caused by stress concentration during demolding, significantly reducing casting damage rates and improving finished product yield. Simultaneously, the adjusting roller drives the bottom... The plate and the synchronous plate drive the top plate to move down as a whole, which can first achieve the initial separation of the top plate, bottom plate and lower mold and upper mold side walls, allowing the four sides of the upper mold to detach from the outer mold sand mold and casting. After the side walls are separated, the top plate is driven by the cooperation of the outer convex rail and the ejector rod to alternately push and separate the top of the casting, so that the adhesion between the top and the outer mold sand mold is gradually released. The whole process is carried out in the order of "side walls first, then top alternately separated", which avoids the problem of concentrated disassembly resistance caused by multiple surfaces of the mold sticking at the same time, making the mold disassembly operation smoother, further reducing the interference to the surface and structure of the casting during the disassembly process, and ensuring the casting forming quality.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 A three-dimensional drawing of a casting mold for a worm gear turbocharger housing; Figure 2 A partial casting mold for a worm gear turbocharger housing Figure 1 ; Figure 3 A casting mold for a worm gear turbocharger housing Figure 2 Enlarged view of point A in the middle; Figure 4 A casting mold for a worm gear turbocharger housing Figure 2 Enlarged view at point B in the middle; Figure 5 An assembly drawing of the upper and lower molds for a worm gear turbocharger housing casting mold; Figure 6 An assembly drawing of the upper mold and top plate of a worm gear turbocharger housing casting mold; Figure 7 A casting mold for a worm gear turbocharger housing Figure 6 Enlarged view at point C; Figure 8 A casting mold for a worm gear turbocharger housing Figure 2 Bottom view; Figure 9 A casting mold for a worm gear turbocharger housing Figure 8 Enlarged view at point D; Figure 10 A partial casting mold for a worm gear turbocharger housing Figure 2 ; Figure 11 A casting mold for a worm gear turbocharger housing Figure 10 Enlarged view at point E in the middle; Figure 12 A partial casting mold for a worm gear turbocharger housing Figure 3 ; Figure 13 A partial casting mold for a worm gear turbocharger housing Figure 4 .

[0019] In the picture: 1. Base; 11. Lower mold; 111. Support leg; 112. Mounting ear; 113. Base plate; 114. Outer mold sand mold; 115. Mold cavity; 116. Inner mold sand mold; 12. Upper mold; 121. Synchronization plate; 122. Top plate; 123. Insert rod; 124. Insert plate; 125. Compression spring; 13. Ejector rod; 131. Guide seat; 132. Rocker arm; 133. Protrusion; 14. Guide plate; 141. Guide rail; 142. Outer protruding rail; 15. Connecting plate; 151. Connecting frame; 152. Positioning hole; 153. Pressure plate; 154. Pressure rod; 155. Ball bearing; 156. Positioning rod; 157. Positioning spring; 158. Positioning plate; 2. Adjusting roller; 21. Drive motor; 211. Synchronous shaft; 212. Fixing frame; 22. Combination groove; 221. Lifting groove; 222. Lowering groove; 223. Slider; 224. Synchronous frame; 225. Limiting rod; 23. Guide block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention. Example 1

[0021] like Figures 1 to 13 As shown, a worm gear turbocharger housing casting mold includes a base 1.

[0022] A lower mold 11 is installed on the base 1. A base plate 113 is movably inserted into the bottom of the lower mold 11. An upper mold 12 is covered on the lower mold 11. A synchronization plate 121 is slidably installed on the upper mold 12. Several pairs of alternately sliding top plates 122 are vertically slidably arranged at the bottom of the synchronization plate 121. The bottom of the several pairs of top plates 122 is placed inside the upper mold 12. A rod 123 is installed on the top plate 122. The rod 123 movably passes through the synchronization plate 121. Several pairs of ejector rods 13 are slidably arranged on the synchronous plate 121. The end of each ejector rod 13 is connected to the guide plate 14 fixedly installed on the upper mold 12. Each guide plate 14 is equipped with a guide rail 141. Adjacent guide rails 141 are equipped with external convex rails 142 of different heights. The external convex rails 142 are used to drive the ejector plate 122 to move alternately during the downward movement of the synchronous plate 121, which facilitates demolding. A connecting plate 15 is installed on the side wall of the synchronization plate 121, and the connecting plate 15 is movably connected to the connecting bracket 151 installed on the base plate 113. An adjusting roller 2 is rotatably mounted on the base 1. A guide block 23 is mounted on the adjusting roller 2, and one end of the guide block 23 has an inclined surface. The guide block 23 is used to press the positioning rod 156 set on the connecting frame 151 into the connecting plate 15. The top plate 122 and the bottom plate 113 are vertically aligned. A combination groove 22 is opened on the adjusting roller 2, and the combination groove 22 includes a lifting groove 221 and a lowering groove 222. The lifting groove 221 is adapted to the inclined surface, and the lowering groove 222 is a spiral groove. A slider 223 is slidably arranged on the combination groove 22, and the slider 223 is used to drive the bottom plate 113 and the top plate 122 to move down synchronously for demolding. Through the coordinated design of components such as the external convex rail 142, positioning rod 156, and slider 223, the top plate 122 can move alternately to assist demolding, and the positioning rod 156 can lock the relative position of the top plate 122 and the bottom plate 113. At the same time, the spiral downward groove 222 provides a stable vertical driving force to ensure that the demolding process is orderly and controllable, and avoids the misalignment of components from affecting the quality of the casting.

[0023] like Figures 1 to 13 As shown, in a specific embodiment, four support legs 111 are installed on the base 1. The four support legs 111 are T-shaped, and their bottoms are connected to the bottom of the lower mold 11. Mounting ears 112 are provided on the sidewalls between the lower mold 11 and the upper mold 12, and these mounting ears 112 fit together. Mounting holes are provided between the mounting ears 112 for easy connection. Anti-slip pads are installed on the bottom of the base 1. The T-shaped support legs 111 enhance the connection stability between the lower mold 11 and the base 1. The mounting ears 112 and mounting holes enable precise mold closing between the lower mold 11 and the upper mold 12. The anti-slip pads prevent the mold from shifting during operation, ensuring the stability of the mold structure from multiple dimensions and providing a reliable foundation for subsequent casting and demolding.

[0024] like Figures 1 to 13 As shown, furthermore, the cavity enclosed by the lower mold 11 and the upper mold 12 is filled with an outer mold sand mold 114. The outer mold sand mold 114 contains a mold cavity 115, and the mold cavity 115 contains an inner mold sand mold 116. The outer mold sand mold 114 and the inner mold sand mold 116 are made of different materials. A pouring hole is provided on the top plate 122, and the pouring hole is interconnected with the mold cavity 115. The outer mold sand mold 114 and the inner mold sand mold 116 are made of different materials, which can respectively adapt to the forming requirements of the external contour and internal hollow structure (such as vortex air passages) of the casting, ensuring the dimensional accuracy of the mold cavity 115. At the same time, the pouring hole on the top plate 122 is directly connected to the mold cavity 115, facilitating precise injection of molten metal and reducing the problem of molten metal overflow or insufficient filling during the pouring process.

[0025] like Figures 1 to 13As shown, a plate 124 is further installed on the top of the insertion rod 123. The cross-section of the plate 124 is larger than that of the insertion rod 123. A compression spring 125 is sleeved on the outer wall of the insertion rod 123. One end of the compression spring 125 is engaged with the bottom of the synchronization plate 121, and the other end is engaged with the bottom of the plate 124. The plate 124 prevents the insertion rod 123 from coming out of the synchronization plate 121, while the compression spring 125 provides a restoring force after the insertion rod 123 moves upward, ensuring that the insertion rod 123 quickly returns to its initial position after moving the top plate 122, preparing for the next operation. At the same time, the spring buffering effect reduces the hard collision between the insertion rod 123 and the synchronization plate 121, extending the service life of the components.

[0026] like Figures 1 to 13 As shown, further, a guide seat 131 is movably inserted into the outer wall of the push rod 13. The bottom of the guide seat 131 is mounted on the synchronous plate 121. A rocker arm 132 is rotatably mounted on the side wall of the push rod 13. The end of the rocker arm 132 is rotatably connected to the lower surface of the insert plate 124. The rocker arm 132 is in an inclined state. A notch is opened at the end of the push rod 13, and the notch is slidably connected to the guide plate 14. A protrusion 133 is installed at the notch. The protrusion 133 is slidably connected to the guide rail 141. The outer protrusion rail 142 synchronously presses the push rod 13 to slide inward, and drives the insert plate 124 and the insert rod 123 to move upward through the rocker arm 132. The guide seat 131 provides precise guidance for the sliding of the ejector rod 13, preventing the ejector rod 13 from deviating. The tilting rocker arm 132 can convert the horizontal sliding of the ejector rod 13 into the vertical movement of the insert rod 123. The protrusion 133 and the outer protruding rail 142 can realize the alternating sliding of the ejector rod 13, thereby driving the top plate 122 to move upward alternately, laying the foundation for subsequent decentralized ejection demolding.

[0027] like Figures 1 to 13As shown, the connecting frame 151 is L-shaped, and a positioning rod 156 is movably inserted into the end of the connecting frame 151. A positioning hole 152 is opened at the bottom of the connecting plate 15, and the positioning hole 152 is located below the connecting frame 151. The positioning rod 156 is movably inserted into the connecting frame 151. A positioning plate 158 is installed at one end of the positioning rod 156, and a positioning spring 157 is sleeved on the positioning rod 156. One end of the positioning spring 157 is snapped onto the positioning plate 158, and the other end of the positioning spring 157 is snapped onto the side wall of the connecting frame 151. A pressure plate 153 is installed on the positioning rod 156, and the pressure plate 153 and the positioning plate 158 are in close contact. A pressure rod 154 is installed at the center of the pressure plate 153. The extension line of the pressure rod 154 intersects the rotation center of the adjusting roller 2. A ball bearing 155 is installed at the end of the pressure rod 154, and the ball bearing 155 is in rolling contact with the surface of the guide block 23. The L-shaped connecting bracket 151 facilitates the connection between the base plate 113 and the connecting plate 15. The positioning spring 157 enables the positioning rod 156 to automatically reset, while the ball bearing 155 reduces the frictional loss between the pressure rod 154 and the guide block 23, ensuring that the guide block 23 stably presses the pressure rod 154 when rotating, thereby pushing the positioning rod 156 to accurately insert into the positioning hole 152, achieving reliable locking between the top plate 122 and the base plate 113. Example 2

[0028] The difference between the above embodiments and this embodiment is that: Figures 1 to 13 As shown, a synchronous shaft 211 is installed at the rotation center of the adjusting roller 2. A fixed frame 212 is rotatably mounted on the synchronous shaft 211. The bottom of the fixed frame 212 is mounted on the base 1. A drive motor 21 is mounted on the fixed frame 212, and the output end of the drive motor 21 is connected to the synchronous shaft 211. Power is provided by the drive motor 21, which drives the adjusting roller 2 to rotate stably via the synchronous shaft 211. This replaces the manual drive method, which not only improves the demolding efficiency but also ensures that the rotation speed of the adjusting roller 2 is uniform, avoiding the demolding rhythm disorder caused by uneven manual operation. The fixed frame 212 provides stable support for the synchronous shaft 211 and the drive motor 21.

[0029] like Figures 1 to 13 As shown, in a specific embodiment, a limiting rod 225 is installed on the fixing frame 212. The limiting rod 225 is slidably connected to the slider 223. A synchronization frame 224 is installed on the slider 223. The synchronization frame 224 is a bent rod, and its bottom is connected to the base plate 113. The limiting rod 225 restricts the slider 223 to slide only along the combination groove 22, preventing the slider 223 from deviating and causing deviation in the transmission of driving force. The bent synchronization frame 224 can adapt to the installation position of the base plate 113, ensuring that the vertical movement of the slider 223 is accurately transmitted to the base plate 113, driving the base plate 113 to move downward stably.

[0030] like Figures 1 to 13As shown, the lifting groove 221 is a horizontal groove, and the central angle of the projection pattern of the guide block 23 along the axial direction of the adjusting roller 2 is smaller than the central angle of the projection pattern of the lower sliding groove 222 along the axial direction of the adjusting roller 2. This ensures that when the slider 223 slides in the lower sliding groove 222, it sequentially drives the connecting plate 15 and the connecting frame 151 to lock and unlock. The horizontal lifting groove 221 can stably maintain the locked state of the positioning rod 156 in the initial stage of the rotation of the adjusting roller 2, while the larger central angle of the lower sliding groove 222 provides sufficient sliding stroke for the slider 223. This ensures that during the process of the slider 223 driving the bottom plate 113 and the top plate 122 to move downward, locking is completed first to ensure the overall synchronous movement, and then unlocking is achieved to disassemble the parts, avoiding confusion in the locking and unlocking sequence and affecting demolding.

[0031] The implementation principle of the worm gear turbocharger housing casting mold of the present invention is as follows: During the initial casting operation, ensure that the lower mold 11 and upper mold 12 on the base 1 are tightly closed through the mounting ears 112 and mounting holes on the side walls. At this time, the cavity enclosed by the lower mold 11 and upper mold 12 is filled with the outer mold sand mold 114. The inner mold sand mold 116 is pre-placed in the mold cavity 115 inside the outer mold sand mold 114. The outer mold sand mold 114 and the inner mold sand mold 116 are made of different materials to suit their respective molding requirements. Then, molten metal, such as heat-resistant ductile iron, is injected into the mold cavity 115 through the pouring hole on the top plate 122. After injection, allow it to stand until the molten metal completely cools and solidifies to form the turbocharger housing casting. During the cooling process, it is necessary to ensure the overall stability of the mold to avoid defects in the casting caused by vibration.

[0032] After the casting has cooled and solidified, it enters the demolding stage.

[0033] First, the drive motor 21 installed on the fixed frame 212 is started. The output end of the drive motor 21 drives the synchronous shaft 211 to rotate, and the synchronous shaft 211 further drives the adjusting roller 2 to rotate synchronously on the base 1. In the initial stage of the rotation of the adjusting roller 2, the guide block 23 installed on its outer side wall rotates accordingly. The inclined surface of one end of the guide block 23 contacts the ball 155 at the end of the pressure rod 154 on the connecting frame 151 and generates a squeezing effect. Under the squeezing, the pressure rod 154 pushes the pressure plate 153. The pressure plate 153 drives the positioning rod 156 to move towards the connecting plate 15. At this time, the positioning spring 157 on the positioning rod 156 is compressed by the positioning plate 158 until the positioning rod 156 is inserted into the positioning hole 152 opened at the bottom of the connecting plate 15, so as to lock and fix the top plate 122 (through the synchronous plate 121 and the connecting plate 15) and the bottom plate 113 (through the connecting frame 151), ensuring that the relative position of the two is stable during the subsequent overall movement.

[0034] As the adjusting roller 2 continues to rotate, the slider 223 within the combined groove 22 on its surface, guided by the limiting rod 225, begins to slide along the downward groove 222 of the combined groove 22 (the downward groove 222 is a spiral groove that provides vertical driving force). The slider 223 drives the bottom plate 113 to move vertically downward through the synchronous frame 224. Since the top plate 122 and the bottom plate 113 are locked at this time, the bottom plate 113 further drives the synchronous plate 121 and the top plate 122 at the bottom of the synchronous plate 121 to move vertically downward synchronously through the connecting frame 151 and the connecting plate 15. In the initial stage of the overall vertical downward movement, the bottom plate 113 gradually separates from the bottom of the lower mold 11, and the synchronous plate 121 drives the top plate 122 to gradually separate from the interior of the upper mold 12, realizing the initial separation of the top plate 122, the bottom plate 113, the lower mold 11, and the side walls of the upper mold 12, creating space for subsequent demolding.

[0035] As the entire assembly continues to move downwards, the protrusion 133 at the end of the push rod 13, which is slidably mounted on the synchronous plate 121, slides relative to the guide rail 141 of the guide plate 14, which is fixedly mounted on the upper mold 12. When the protrusion 133 slides to the outer protrusion rail 142 of different height on the guide rail 141, the outer protrusion rail 142 exerts a squeezing effect on the protrusion 133, causing the push rod 13 to slide inwards towards the synchronous plate 121. When the push rod 13 slides, it causes the rocker arm 132, which is rotatably mounted on its side wall, to change angle. The end of the rocker arm 132 pushes the insert plate 124 upwards, and the insert plate 124 causes the insert rod 123 to slide upwards along the movable through-hole of the synchronous plate 121. At the same time, the compression spring 125 sleeved on the outer wall of the insert rod 123 is compressed. Because several pairs of top plates 122 are connected one-to-one with the insert rods 123, and the heights of the outer convex rails 142 are different, the timing and degree of compression on the top rods 13 at different positions are different. This causes the rocker arm 132, the insert plate 124, and the insert rods 123 to drive the several pairs of top plates 122 to move upward alternately. The alternating movement of the top plates 122 can generate an intermittent upward pushing effect on the outer mold sand mold 114 and the casting in the mold cavity 115, avoiding the difficulty of demolding due to adhesion between the casting and the outer mold sand mold 114 and the top plates 122, making the demolding process smoother and gradually realizing the separation of the casting from the top plates 122.

[0036] As the slider 223 slides along the lower sliding groove 222, the squeezing action between the guide block 23 on the adjusting roller 2 and the ball 155 eventually disappears. Under the elastic restoring force of the positioning spring 157, the positioning rod 156 drives the pressure plate 153 and pressure rod 154 to reset via the positioning plate 158. The positioning rod 156 then disengages from the positioning hole 152 of the connecting plate 15, releasing the locking state between the top plate 122 and the bottom plate 113. At this time, the upper mold 12 can be hoisted by external hoisting equipment to completely separate the upper mold 12 from the lower mold 11. After the upper mold 12 is separated, the upper half of the outer mold sand mold 114 is moved away along with the upper mold 12, exposing the upper half of the casting.

[0037] After the upper mold 12 is lifted and separated, the adjusting roller 2 continues to rotate, and the slider 223 continues to slide along the lower sliding groove 222. Through the synchronous frame 224, the bottom plate 113 is driven to move further vertically downward. The bottom plate 113 drives the lower half of the outer mold sand mold 114 at the bottom of the lower mold 11 and the casting to move downward together, finally achieving complete separation of the bottom plate 113 and the lower mold 11. At this time, the outer mold sand mold 114 encloses the casting. Subsequently, only the sand mold needs to be cleaned (such as breaking the outer mold sand mold 114 and removing the inner mold sand mold 116) to obtain the complete turbocharger housing casting, completing the entire casting and demolding process.

Claims

1. A casting mold for a worm gear turbocharger housing, comprising a base, characterized in that: A lower mold is installed on the base. A base plate is movably inserted into the bottom of the lower mold. An upper mold is covered on the lower mold. A synchronization plate is slidably installed on the upper mold. Several pairs of alternately sliding top plates are vertically slidably arranged at the bottom of the synchronization plate. The bottom of the several pairs of top plates is placed inside the upper mold. A rod is installed on the top plate. The rod movably passes through the synchronization plate. The synchronous plate is slidably provided with several pairs of push rods. The end of each push rod is connected to a guide plate fixedly installed on the upper mold. Each guide plate is equipped with a guide rail, and adjacent guide rails are equipped with external convex rails of different heights. The external convex rails are used to drive the top plate to move alternately during the downward movement of the synchronous plate, which facilitates demolding. A connecting plate is installed on the side wall of the synchronization plate, and the connecting plate is movably connected to the connecting frame installed on the base plate; An adjusting roller is rotatably mounted on the base, and a guide block is mounted on the adjusting roller. One end of the guide block has an inclined surface. The guide block is used to press the positioning rod set on the connecting frame into the connecting plate. The top plate and the bottom plate are vertically aligned. A combination groove is opened on the adjusting roller, and the combination groove includes a lifting groove and a lowering groove. The lifting groove is adapted to the inclined surface, and the lowering groove is a spiral groove. A slider is slidably mounted on the combination groove, and the slider is used to drive the bottom plate and the top plate to move down synchronously for demolding. A plate is installed on the top of the insertion rod. The cross-section of the plate is larger than that of the insertion rod. A compression spring is sleeved on the outer wall of the insertion rod. One end of the compression spring is engaged with the bottom of the synchronization plate, and the other end of the compression spring is engaged with the bottom of the plate. A guide seat is movably inserted into the outer wall of the top rod. The bottom of the guide seat is mounted on a synchronous plate. A rocker arm is rotatably mounted on the side wall of the top rod. The end of the rocker arm is rotatably connected to the lower surface of the insert plate. The rocker arm is in an inclined state. A notch is opened at the end of the top rod, and the notch is slidably connected to the guide plate. A protrusion is installed at the notch, and the protrusion is slidably connected to the guide rail. The outer protruding rail synchronously presses the top rod to slide inward, and drives the insert plate and the insert rod to move upward through the rocker arm. The connecting frame is L-shaped, and a positioning rod is movably inserted into the end of the connecting frame. A positioning hole is opened at the bottom of the connecting plate. A positioning plate is installed at one end of the positioning rod, and a positioning spring is sleeved on the positioning rod. One end of the positioning spring is snapped onto the positioning plate, and the other end of the positioning spring is snapped onto the side wall of the connecting frame. A pressure plate is installed on the positioning rod, and the pressure plate and the positioning plate are in close contact with each other. A pressure rod is installed at the center of the pressure plate, and the extension line of the pressure rod intersects with the rotation center of the adjusting roller. A ball is installed at the end of the pressure rod, and the ball is in rolling contact with the surface of the guide block. A synchronous shaft is installed at the rotation center of the adjusting roller, a fixed frame is rotatably mounted on the synchronous shaft, the bottom of the fixed frame is mounted on the base, a drive motor is mounted on the fixed frame, and the output end of the drive motor is connected to the synchronous shaft. A limit rod is installed on the fixed frame, and the limit rod is slidably connected to the slider. A synchronization frame is installed on the slider. The synchronization frame is a bent rod, and the bottom of the synchronization frame is connected to the base plate. The lifting groove is a horizontal groove, and the central angle of the projection pattern of the guide block along the axial direction of the adjusting roller is smaller than the central angle of the projection pattern of the lower sliding groove along the axial direction of the adjusting roller, so as to ensure that when the slider slides in the lower sliding groove, it sequentially drives the connecting plate and the connecting frame to lock and unlock.

2. A turbocharger housing casting mold according to claim 1, characterized in that The base is equipped with four support legs, which are T-shaped. The top of the support legs is connected to the bottom of the lower mold. The side wall between the lower mold and the upper mold is provided with mounting ears, which fit together. Mounting holes are provided between the mounting ears to facilitate connection. The bottom of the base is equipped with an anti-slip pad.

3. The worm gear turbocharger housing casting mold according to claim 2, characterized in that, The cavity enclosed by the lower mold and the upper mold is filled with an outer mold sand mold. The outer mold sand mold has a mold cavity inside, and the mold cavity has an inner mold sand mold inside. The outer mold sand mold and the inner mold sand mold are made of different materials. A pouring hole is opened on the top plate, and the pouring hole is connected to the mold cavity.

4. A worm gear turbocharger housing casting mold according to claim 3, characterized in that, The positioning hole is located below the connecting frame, and the positioning rod is movably inserted into the positioning hole.

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