An extrusion molding device and shock absorber for an automobile intelligent sliding plate housing

Abstract

The present invention relates to the technical field of automobile accessories, and discloses an extrusion molding device for a built-in electromagnetic valve housing of an automobile shock absorber, comprising an injection machine, a first mold, a second mold, a shooting platform, and a vane housing, a pipe is installed on the outside of the shooting platform, an injection hole used in conjunction with the pipe is provided on the side of the second mold, an injection tube is plugged into the shooting platform and the inside of the pipe, a housing is plugged into the side of the first mold, a piston is slidably inserted at the end of the housing, an overflow cavity is provided on the inside of the housing, and an overflow pipe is connected to the side of the housing. The second mold is molded with the first mold, the discharge end of the injection tube is located in the first injection cavity, the injection tube is pulled back while injecting the raw material, and the raw material gradually overfills the first injection cavity and the second injection cavity, so that the piston is pushed up, and the piston is reset after the excess raw material is discharged through the overflow cavity and the overflow pipe, and the first mold is resealed, so that the raw material injection is more uniform, thereby improving the performance of the vane housing after sintering.

Description

Technical Field

[0001] The invention relates to the technical field of automobile accessories, in particular to an extrusion molding device and a shock absorber for an automobile intelligent sliding plate housing. Background Art

[0002] MIM (Metal Injection Molding) is a metal injection molding technology, which is similar to the working principle and usage of injection molding machines. It is used to produce metal parts with complex shapes. Its main steps include: 1. Raw material preparation: Mix metal powder with binder to make metal injection material; 2. Injection molding: Heat the metal injection material to a certain temperature and inject it into the mold, and form a rough finished product after cooling; 3. Remove the binder: Through heat treatment (degreasing process), remove the binder after molding, leaving only metal powder; 4. Sintering: Sinter the metal powder at high temperature to make its density and strength meet the design requirements. Powder metallurgy technology produces automotive parts with complex shapes and structures. In the process, different parts of the parts need to be manufactured separately, and then the complete parts are assembled through processes such as welding. The advantage of MIM process is that it can directly produce parts with complex geometric shapes, with high material utilization rate and suitable for mass production. Therefore, MIM process is often used to manufacture precision parts such as medical devices, electronic equipment and automotive parts.

[0003] Automobile suspension is a general term for all force transmission connection devices between the frame and the axle. It is used to support the vehicle body and transmit the force and torque between the wheel and the frame. It can also buffer the impact force transmitted to the vehicle body by the uneven road surface, reduce the vibration caused by it, and provide a smooth and comfortable riding environment for the driver and passengers. Automobile suspension consists of three parts: elastic element, guide device and shock absorber. The shock absorber is the main element that generates damping force, which is used to quickly attenuate the vibration of the vehicle and improve the driving smoothness of the vehicle. Solenoid valve shock absorber is a widely used shock absorber that can be applied to different types of automobile suspension. The solenoid valve in the solenoid valve shock absorber can be located in the working cylinder of the shock absorber, and the damping of the shock absorber can be adjusted by the external motor regulating valve. After the built-in solenoid valve is energized, a new oil circuit can be formed according to the actual current to achieve the effect of adjusting the recovery and compression damping. Among them, the change of the oil circuit can be realized by the slide and the slide housing. The slide and the slide housing are the key components of the built-in solenoid valve shock absorber.

[0004] At present, the existing MIM process usually includes a mold, a control system and an injection system. After the two molds are closed, the injection system injects the raw material into the mold through the injection hole opened on the mold. However, the raw material is easily unevenly distributed during injection, resulting in uneven density inside the part during the subsequent sintering process, which easily affects the performance of the part. Especially for the structure of the vane housing in the above-mentioned built-in solenoid valve shock absorber, the existing MIM process is difficult to meet the strength requirements of the vane housing. Therefore, we propose an extrusion molding device and shock absorber for an intelligent automotive vane housing based on the MIM process. Summary of the invention

[0005] The present invention provides an extrusion molding device for a built-in electromagnetic valve housing of an automobile shock absorber and a shock absorber, which has the beneficial effect of improving the uniformity of distribution of raw materials during injection, making the internal density of parts uniform during sintering, thereby improving the performance of parts, and solves the problem that the existing MIM process mentioned in the above background technology usually includes a mold, a control system and an injection system. After two molds are clamped, the injection system injects raw materials into the mold through an injection hole opened on the mold. However, the raw materials are easily unevenly distributed during injection, resulting in uneven density inside the parts during the subsequent sintering process, which is easy to affect the performance of the parts.

[0006] The present invention provides the following technical solution: an extrusion molding device for a housing with a built-in electromagnetic valve of an automobile shock absorber, comprising an injection machine, a first mold installed on the side of the injection machine, a second mold slidably arranged on the side of the injection machine, a shooting platform arranged on the side of the injection machine, and a slide housing extruded by the first mold and the second mold, the shooting platform being arranged on a side close to the second mold, a connecting pipe being installed on the outer side of the shooting platform, an injection hole for use with the connecting pipe being opened on the side of the second mold, an injection tube being jointly inserted on the shooting platform and the inner side of the connecting pipe, a housing being inserted on the side of the first mold, a piston being slidably inserted on one end of the housing close to the first mold, an overflow cavity being opened on the inner side of the housing, and an overflow pipe communicating with the overflow cavity being connected to the side of the housing.

[0007] As an optional scheme of the extrusion molding device of the built-in solenoid valve housing of an automobile shock absorber described in the present invention, one end of the injection tube is connected to the injection system of the injection machine, the injection tube is connected to the metal injection liquid raw material, a connecting rod is installed on the outside of the injection tube, the end of the connecting rod is slidably inserted on the inside of the injection machine, a rack is slidably arranged on the inside of the injection machine, the end of the connecting rod is connected to the rack, a gear is rotatably installed on the inside of the injection machine, the gear is meshed with the rack, a motor is also installed inside the injection machine, and the output shaft of the motor is transmission connected to the gear.

[0008] As an optional solution of the extrusion molding device of the automobile shock absorber built-in solenoid valve housing described in the present invention, wherein: a limit ring is inserted into the inner side of the shooting platform, and the injection tube is slidably inserted in the limit ring.

[0009] As an optional scheme of the extrusion molding device of the automobile shock absorber built-in solenoid valve housing described in the present invention, wherein: a first injection cavity is opened on the inner side of the first mold, a second injection cavity is opened on the inner side of the second mold, and the overflow cavity is connected to the first injection cavity.

[0010] As an optional solution for the extrusion molding device of the automobile shock absorber built-in solenoid valve housing described in the present invention, wherein: a tube is slidably inserted into the inner side of the housing, the end of the tube is connected to the piston, and a first spring is also arranged on the inner side of the housing, one end of the first spring is connected to the tube, and the other end of the first spring is connected to the inner wall of the housing.

[0011] As an optional scheme for the extrusion molding device of the automobile shock absorber built-in solenoid valve housing described in the present invention, wherein: a first wedge block is arranged on the inner side of the housing, a push rod is slidably inserted into the side of the housing, the end of the sleeve rod is connected to the first wedge block, a second spring is sleeved on the outer side of the push rod, one end of the second spring is connected to the push rod, and the other end of the second spring is connected to the outer wall of the housing.

[0012] As an optional scheme for the extrusion molding device of an automobile intelligent slide shell described in the present invention, wherein: a second wedge block is also arranged on the inner side of the shell, the second wedge block is used in conjunction with the first wedge block, a limiting block is installed on the inclined surface of the first wedge block, a limiting groove used in conjunction with the limiting block is opened on the inclined surface of the second wedge block, the limiting block is slidably inserted in the limiting groove, a positioning rod is installed on the outer side of the second wedge block, the ends of the positioning rod are jointly inserted into the first spring and the inner side of the insert tube, and the end of the positioning rod abuts against the outer side of the piston, a support rod is installed on the outer side of the first mold, a support ring is installed on the end of the support rod, and the support ring is slidably sleeved on the middle part of the push rod.

[0013] As an optional solution of the automobile shock absorber described in the present invention, the vane housing is arranged in the inner cylinder, a groove is provided on the outer side of the vane housing, and an oil circuit is provided on the inner side, the groove is arranged as a circular groove, a sealing ring is sleeved on the outer side of the vane housing, the inner ring of the sealing ring is clamped in the groove, and the outer ring of the sealing ring is slidably fitted with the inner wall of the inner cylinder.

[0014] As an optional solution for an automobile shock absorber described in the present invention, a valve plate is slidably inserted into the inner side of the slide housing, a through hole is opened in the middle of the valve plate, and the through hole is connected to the oil circuit; the inner cylinder of the shock absorber also includes a slide and an electromagnet, wherein the slide is slidably inserted into the inner side of the slide housing, a through hole is opened in the middle of the slide, and the electromagnet is used to control the lifting and lowering of the slide so that the slide is in a position where the through hole is connected to the oil circuit.

[0015] The present invention has the following beneficial effects:

[0016] 1. The extrusion molding device and shock absorber of the automobile shock absorber with a built-in electromagnetic valve housing, the driving system of the injection machine drives the shooting platform to approach the second mold, and slides the pipe into the injection hole, and then drives the second mold to move and close the mold with the first mold. At the same time, the motor drives the gear to rotate, and drives the injection tube to move through the meshing of the gear and the rack. In addition, the speed of the injection tube is greater than the speed of the second mold, so that the injection tube extends outward from the side of the shooting platform and the second mold, so that when the first mold and the second mold are closed, the discharge end of the injection tube is located at the end of the first injection cavity;

[0017] Subsequently, the raw material is injected into the first injection cavity through the injection tube, and at the same time, the motor drives the injection tube to slowly pull back, so that the raw material gradually fills the first injection cavity and the second injection cavity, and when the injection tube retreats to the injection hole, the raw material continues to be injected inwardly until the internal pressure generated by the oversaturation of the raw material in the first mold and the second mold is greater than the rigidity of the first spring, so that the raw material pushes the piston upward into the overflow cavity, and the first spring is compressed, so that excess raw material is discharged through the overflow cavity and the overflow tube, and finally the piston is reset under the action of the rebound force of the first spring to reseal the first mold, so that the raw material injection is more uniform, thereby improving the performance of the slide shell after sintering, and solving the existing MIM process as much as possible. It usually includes a mold, a control system and an injection system. After the two molds are closed, the injection system injects the raw material into the mold through the injection hole opened in the mold. However, the raw material is prone to uneven distribution during injection, resulting in uneven density inside the part during the subsequent sintering process, which is easy to affect the performance of the part.

[0018] 2. The extrusion molding device of the automobile shock absorber with a built-in solenoid valve housing and the shock absorber, when the first mold and the second mold are molded together, the second mold pushes the push rod and the first wedge block to move, and the second spring is compressed. Through the cooperation of the first wedge block and the second wedge block, the second wedge block drives the positioning rod to move upward, thereby releasing the resistance to the piston, so that the piston can move upward into the overflow chamber;

[0019] After the raw material overflow is completed, the shooting platform drives the second mold away from the first mold. The rebound force of the second spring is greater than the upward force exerted on the piston. Therefore, under the action of the rebound force of the second spring, the positioning rod presses the piston down to its original position, making it easier to reseal the first mold, thereby improving the use effect of the device.

[0020] 3. The automobile shock absorber has an extrusion molding device and a shock absorber with a built-in solenoid valve housing. The hydraulic oil in the inner cylinder flows along the oil path opened in the sliding vane housing, and needs to flow through the through hole when flowing in the oil path. After the electromagnet is energized, the magnetism generated by it can control the up and down movement of the sliding vane, so that the sliding vane and the through hole move upward, and the aperture of the through hole in the oil path is reduced, thereby changing the aperture width of the hydraulic oil flowing through the oil path and changing the flow rate of the hydraulic oil, so as to facilitate the adjustment of the damping of the sliding vane housing, thereby improving the shock absorption effect of the automobile shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the slide housing of the present invention.

[0023] Figure 3 It is a schematic diagram of the cutaway structure of the first state of the present invention.

[0024] Figure 4 It is a schematic diagram of the cross-section structure of the second state of the present invention.

[0025] Figure 5 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0026] Figure 6 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0027] Figure 7 It is a schematic diagram of the cutaway structure of the shell of the present invention.

[0028] Figure 8 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the rack of the present invention.

[0030] Fig.10 It is a schematic diagram of the cross-section structure of the valve plate of the present invention in the first state.

[0031] Fig.11 It is a schematic diagram of the cross-section structure of the valve plate of the present invention in the second state.

[0032] Fig.12 It is a schematic diagram of the three-dimensional structure of the valve plate of the present invention.

[0033] In the figure: 100, injection machine; 110, first mold; 120, second mold; 130, shooting platform; 140, slide housing; 141, slot; 142, oil circuit; 150, connecting pipe; 160, injection hole; 170, injection tube; 171, connecting rod; 172, rack; 173, gear; 174, motor; 175, limit ring; 180, housing; 190, piston; 200, overflow chamber; 210, overflow pipe; 220, first injection cavity; 221, second injection cavity; 222, cannula; 223, first spring; 230, first wedge block; 231, push rod; 232, second spring; 240, second wedge block; 241, limit block; 242, limit groove; 243, positioning rod; 244, support rod; 245, support ring; 250, inner cylinder; 251, sealing ring; 252, valve plate; 253, through hole; 254, electromagnet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: This embodiment aims to promote the solution of the existing MIM process, which usually includes a mold, a control system and an injection system. After the two molds are closed, the injection system injects raw materials into the mold through the injection holes opened on the mold. However, the raw materials are easily unevenly distributed during injection, resulting in uneven density inside the parts during the subsequent sintering process, which easily affects the performance of the parts. Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9An extrusion molding device for a built-in electromagnetic valve housing of an automobile shock absorber and a shock absorber, comprising an injection machine 100, a first mold 110 fixedly installed on the upper side of the injection machine 100, a second mold 120 slidably arranged on the upper side of the injection machine 100 through a track, a shooting platform 130 arranged on the side of the injection machine 100, and a slide housing 140 extruded by the first mold 110 and the second mold 120. The shooting platform 130 is connected to the driving system of the injection machine 100, and the movement of the shooting platform 130 is driven by the driving system. The second mold 120 can be connected to the shooting platform 130 through a connecting rod, so that the shooting platform 130 drives the second mold 120. The above are all technical means well known to technicians in this field and will not be repeated here.

[0036] The shooting platform 130 is arranged on a side close to the second mold 120. A connecting pipe 150 is fixedly installed on the side of the shooting platform 130 close to the second mold 120. An injection hole 160 for use with the connecting pipe 150 is opened on the side of the second mold 120. An injection tube 170 is slidably inserted into the inner side of the shooting platform 130 and the connecting pipe 150.

[0037] One end of the injection tube 170 is connected to the injection system of the injection machine 100. The injection tube 170 is connected to the metal injection liquid raw material, so that the raw material is injected through the injection tube 170. A connecting rod 171 is fixedly installed on the lower side of the injection tube 170. The lower end of the connecting rod 171 is slidably inserted into the inner side of the injection machine 100. A rack 172 is slidably arranged on the inner side of the injection machine 100 through a slide rail. The lower end of the connecting rod 171 is fixedly connected to the rack 172. A gear 173 is rotatably installed on the inner side of the injection machine 100 through a bearing. The gear 173 is meshed with the rack 172. A motor 174 is also fixedly installed inside the injection machine 100. The output shaft of the motor 174 is transmission-connected to the gear 173. A limiting ring 175 is fixedly inserted on the inner side of the shooting platform 130. The injection tube 170 is slidably inserted into the limiting ring 175, so that the movement of the injection tube 170 is more stable.

[0038] A shell 180 is fixedly inserted on the upper side of the first mold 110, and a piston 190 is slidably inserted at one end of the shell 180 close to the first mold 110. An overflow chamber 200 is opened on the inner side of the shell 180, and an overflow pipe 210 connected to the overflow chamber 200 is fixedly connected to the side of the shell 180. A first injection chamber 220 is opened on the inner side of the first mold 110, and a second injection chamber 221 is opened on the inner side of the second mold 120, and the overflow chamber 200 is connected to the first injection chamber 220.

[0039] A tube 222 is slidably inserted into the inner side of the shell 180, and the lower end of the tube 222 is fixedly connected to the upper side of the piston 190. A first spring 223 is also provided inside the shell 180, and the lower end of the first spring 223 is fixedly connected to the tube 222, and the upper end of the first spring 223 is fixedly connected to the inner wall of the shell 180.

[0040] In this embodiment: the driving system of the injection machine 100 drives the shooting platform 130 to approach the second mold 120, and slides the pipe 150 into the injection hole 160, and then drives the second mold 120 to move and close the mold with the first mold 110. At the same time, the motor 174 drives the gear 173 to rotate, and drives the injection tube 170 to move through the engagement of the gear 173 and the rack 172. Moreover, the speed of movement of the injection tube 170 is greater than the speed of movement of the second mold 120, so that the injection tube 170 extends outward from the side of the shooting platform 130 and the second mold 120, so that when the first mold 110 and the second mold 120 are closed, the discharge end of the injection tube 170 is located at the end of the first injection cavity 220;

[0041] Subsequently, the raw material is injected into the first injection cavity 220 through the injection tube 170, and at the same time, the motor 174 drives the injection tube 170 to slowly pull back, so that the raw material gradually fills the first injection cavity 220 and the second injection cavity 221. When the injection tube 170 retreats to the injection hole 160, the raw material is continuously injected inward until the internal pressure generated by the oversaturation of the amount of raw material in the first mold 110 and the second mold 120 is greater than the rigidity of the first spring 223, so that the raw material pushes the piston 190 upward into the overflow cavity 200, and the first spring 223 is compressed, so that the excess raw material passes through the overflow cavity. 200 and the overflow pipe 210 are discharged, and finally the piston 190 is reset under the action of the rebound force of the first spring 223 to reseal the first mold 110, so that the raw material injection is more uniform, thereby improving the performance of the slide housing 140 after sintering, and solving the problem as much as possible that the existing MIM process usually includes a mold, a control system and an injection system. After the two molds are closed, the injection system injects the raw material into the mold through the injection hole opened on the mold. However, the raw material is prone to uneven distribution during injection, resulting in uneven density inside the part during the subsequent sintering process, which is easy to affect the performance of the part.

[0042] Embodiment 2: This embodiment aims to solve the problem that after the raw material overflow is completed, the pressure in the first mold 110 and the second mold 120 is still relatively large, which easily hinders the reset of the piston 190 and makes it difficult to reseal the first mold 110, thereby affecting the use effect of the device. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8A first wedge block 230 is slidably provided on the inner side of the shell 180, a push rod 231 is slidably inserted into the side of the shell 180, the end of the sleeve rod is fixedly connected to the first wedge block 230, a second spring 232 is sleeved on the outer side of the push rod 231, one end of the second spring 232 is connected to the push rod 231, and the other end of the second spring 232 is fixedly connected to the outer wall of the shell 180, and the rigidity of the second spring 232 is greater than the resistance exerted on the piston 190.

[0043] A second wedge block 240 is also slidably arranged on the inner side of the shell 180. The second wedge block 240 is used in conjunction with the first wedge block 230. A limit block 241 is fixedly installed on the inclined surface of the first wedge block 230. A limit groove 242 for use with the limit block 241 is opened on the inclined surface of the second wedge block 240. The limit block 241 is slidably inserted in the limit groove 242. The limit block 241 is set to be a sphere to prevent the first wedge block 230 from separating from the second wedge block 240.

[0044] A positioning rod 243 is fixedly installed on the outer side of the second wedge block 240, and the lower ends of the positioning rod 243 are inserted into the inner sides of the first spring 223 and the insert tube 222, and the bottom of the positioning rod 243 abuts against the outer side of the piston 190. A support rod 244 is fixedly installed on the outer side of the first mold 110, and a support ring 245 is fixedly installed on the top of the support rod 244. The support ring 245 is slidably mounted on the middle part of the push rod 231, which supports the push rod 231 and makes the push rod 231 move more smoothly.

[0045] In this embodiment: when the first mold 110 and the second mold 120 are molded together, the second mold 120 pushes the push rod 231 and the first wedge block 230 to move, and the second spring 232 is compressed. Through the cooperation of the first wedge block 230 and the second wedge block 240, the second wedge block 240 drives the positioning rod 243 to move upward, thereby releasing the resistance to the piston 190, so that the piston 190 can move upward into the overflow chamber 200;

[0046] After the raw material overflow is completed, the shooting platform 130 drives the second mold 120 away from the first mold 110. The rebound force of the second spring 232 is greater than the upward force exerted on the piston 190. Therefore, under the action of the rebound force of the second spring 232, the positioning rod 243 presses the piston 190 down to its original position, making it easier to reseal the first mold 110, thereby improving the use effect of the device.

[0047] Embodiment 3: This embodiment is intended to promote the solution of the problem that it is inconvenient to adjust the damping of the sliding plate housing 140, which easily affects the shock absorption effect of the automobile shock absorber. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1 , Figure 2 , Fig.10 , Fig.11 and Fig.12 A car shock absorber includes an inner cylinder 250, a vane housing 140 is arranged in the inner cylinder 250, a slot 141 is provided on the outer side of the vane housing 140, and an oil passage 142 is provided on the inner side, the slot 141 is arranged as a circular groove, a sealing ring 251 is sleeved on the outer side of the vane housing 140, an inner ring of the sealing ring 251 is clamped in the slot 141, and an outer ring of the sealing ring 251 is slidably fitted with the inner wall of the inner cylinder 250.

[0048] A sliding valve plate 252 is slidably inserted inside the sliding plate housing 140, the top of the sliding valve plate 252 is set as a block that can be attracted by magnets, a through hole 253 is opened in the middle of the sliding valve plate 252, the through hole 253 is connected to the oil circuit 142, and the aperture of the through hole 253 is the same as the inner diameter of the oil circuit 142. The inner cylinder 250 of the shock absorber also includes a sliding plate 252 and an electromagnet 254, wherein the sliding plate 252 is slidably inserted inside the sliding plate housing 140, the through hole 253 is opened in the middle of the sliding plate 252, and the electromagnet 254 is used to control the lifting of the sliding plate 252, so that the sliding plate 252 is in a position where the through hole 253 is connected to the oil circuit 142.

[0049] In this embodiment: the hydraulic oil in the inner cylinder 250 flows downward through the oil circuit 142 opened in the vane housing 140, and needs to flow through the through hole 253 when flowing in the oil circuit 142, and the electromagnet 254 is turned on, so that the magnetism generated by the electromagnet 254 attracts the sliding valve plate 252, so that the sliding valve plate 252 and the through hole 253 move upward, reducing the aperture of the through hole 253 in the oil circuit 142, and changing the aperture width of the hydraulic oil passing through the oil circuit 142 to change the flow rate of the hydraulic oil, so as to facilitate the adjustment of the damping of the vane housing 140, thereby improving the shock absorption effect of the automobile shock absorber.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An extrusion molding device for a housing of a built-in electromagnetic valve of an automobile shock absorber, comprising an injection molding machine (100), a first mold (110) mounted on a side of the injection molding machine (100), a second mold (120) slidably disposed on the side of the injection molding machine (100), a shooting platform (130) disposed on the side of the injection molding machine (100), and a slide housing (140) extruded by the first mold (110) and the second mold (120), characterized in that: The shooting platform (130) is arranged on a side close to the second mold (120), a connecting pipe (150) is installed on the outside of the shooting platform (130), an injection hole (160) for use with the connecting pipe (150) is opened on the side of the second mold (120), an injection tube (170) is inserted into the inside of the shooting platform (130) and the connecting pipe (150), a shell (180) is inserted into the side of the first mold (110), a piston (190) is slidably inserted into one end of the shell (180) close to the first mold (110), an overflow cavity (200) is opened on the inside of the shell (180), and an overflow pipe (210) communicating with the overflow cavity (200) is connected to the side of the shell (180); A plug (222) is slidably inserted into the inner side of the housing (180), and the end of the plug (222) is connected to the piston (190). A first spring (223) is also provided inside the housing (180), and one end of the first spring (223) is connected to the plug (222), and the other end of the first spring (223) is connected to the inner wall of the housing (180); A first wedge block (230) is arranged inside the housing (180), a push rod (231) is slidably inserted into the side of the housing (180), an end of the push rod (231) is connected to the first wedge block (230), a second spring (232) is sleeved outside the push rod (231), one end of the second spring (232) is connected to the push rod (231), and the other end of the second spring (232) is connected to the outer wall of the housing (180); A second wedge block (240) is further provided on the inner side of the housing (180). The second wedge block (240) is used in conjunction with the first wedge block (230). A limit block (241) is installed on the inclined surface of the first wedge block (230). A limit groove (242) used in conjunction with the limit block (241) is provided on the inclined surface of the second wedge block (240). The limit block (241) is slidably inserted in the limit groove (242). The second wedge block (230) is provided with a limit groove (242) for use in conjunction with the limit block (241). A positioning rod (243) is installed on the outside of the first mold (240), and the ends of the positioning rod (243) are inserted into the inside of the first spring (223) and the insert tube (222), and the ends of the positioning rod (243) are in contact with the outside of the piston (190). A support rod (244) is installed on the outside of the first mold (110), and a support ring (245) is installed on the end of the support rod (244), and the support ring (245) is slidably sleeved on the middle part of the push rod (231).

2. The extrusion molding device for a built-in electromagnetic valve housing of a shock absorber for an automobile according to claim 1, characterized in that: One end of the injection tube (170) is connected to the injection system of the injection machine (100); the injection tube (170) is connected to a metal injection liquid raw material; a connecting rod (171) is installed on the outside of the injection tube (170); the end of the connecting rod (171) is slidably inserted into the inside of the injection machine (100); a rack (172) is slidably arranged on the inside of the injection machine (100); the end of the connecting rod (171) is connected to the rack (172); a gear (173) is rotatably installed on the inside of the injection machine (100); the gear (173) is meshed with the rack (172); a motor (174) is also installed inside the injection machine (100); the output shaft of the motor (174) is drivingly connected to the gear (173).

3. The extrusion molding device for a built-in electromagnetic valve housing of a shock absorber for an automobile according to claim 1, characterized in that: A limiting ring (175) is inserted into the inner side of the shooting platform (130), and the injection tube (170) is slidably inserted into the limiting ring (175).

4. The extrusion molding device for a housing of a built-in electromagnetic valve of a shock absorber for an automobile according to claim 1, characterized in that: A first injection cavity (220) is provided inside the first mold (110), a second injection cavity (221) is provided inside the second mold (120), and the overflow cavity (200) is connected to the first injection cavity (220).

5. An automobile shock absorber, comprising a vane housing manufactured by the extrusion molding device for a built-in electromagnetic valve housing of an automobile shock absorber according to any one of claims 1 to 4, comprising an inner cylinder (250), characterized in that: The vane housing (140) is arranged in the inner cylinder (250); a slot (141) is provided on the outer side of the vane housing (140); and an oil passage (142) is provided on the inner side of the vane housing (140); the slot (141) is arranged as a circular groove; a sealing ring (251) is sleeved on the outer side of the vane housing (140); an inner ring of the sealing ring (251) is clamped in the slot (141); and an outer ring of the sealing ring (251) is slidably fitted to an inner wall of the inner cylinder (250).

6. The automobile shock absorber according to claim 5, characterized in that: The inner cylinder (250) of the shock absorber also includes a slide (252) and an electromagnet (254), wherein the slide (252) is slidably inserted into the inner side of the slide housing (140), a through hole (253) is provided in the middle of the slide (252), and the electromagnet (254) is used to control the lifting and lowering of the slide (252) so that the slide (252) is in a position where the through hole (253) is connected to the oil circuit (142).

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