A precision mold for automotive parts

Abstract

The present invention relates to the field of injection mold technology and discloses a precision mold for automotive parts, comprising a hot melt tank, an extrusion assembly, and an injection molding box. The hot melt tank is fixedly mounted on the top of the injection molding box via four support legs. The extrusion assembly is disposed between the injection molding box and the hot melt tank, and the bottom of the extrusion assembly is fixedly mounted to the top of the injection molding box. This precision mold for automotive parts achieves uniform hot melting of hot plastic liquid, automatic injection cessation, and automatic mold closing.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, in particular to a precision mold for automobile parts. Background Art

[0002] Injection mold manufacturing involves placing plastic into a mold and then heating it. Gravity and heat form the plastic inside the mold into the desired shape. The injection molding process offers cost advantages over traditional blow molding and injection molding. Products made with this process generate no internal stress throughout the production process, resulting in more stable product quality and structure. Furthermore, the mold manufacturing costs are low, making it particularly suitable for high-variety, small-batch production during new product development.

[0003] The invention of precision injection molds for automotive parts has brought a variety of conveniences to people's production and daily lives. Modern automobile production is inseparable from precision injection molds for automotive parts, and they play an indispensable role. However, existing precision injection molds for automotive parts often lack technical features such as uniform melting of the hot plastic liquid, automatic injection stop, and automatic mold closing.

[0004] To this end, we propose a precision mold for automotive parts. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the present invention provides the following technical solution: a precision mold for automotive parts, including a hot melt tank, an extrusion assembly and an injection molding box, the hot melt tank is fixedly installed on the top of the injection molding box through four supporting legs, the extrusion assembly is arranged between the injection molding box and the hot melt tank, and the bottom of the extrusion assembly is fixedly installed on the top of the injection molding box.

[0006] Preferably, the hot melt tank includes a tank body for holding materials and a stirring motor installed on the top of the tank body. The bottom of the stirring motor is fixedly installed with a rotating shaft passing through the top of the tank body, and a stirring rod is fixedly installed on the outer peripheral surface of the rotating shaft. The bottom of the tank body is provided with a discharge slope, and the middle part of the bottom of the tank body is integrated with a discharge pipe, and the bottom of the discharge pipe is fixedly connected to the top of the extrusion assembly.

[0007] Preferably, the extrusion assembly includes a conveying pipe, a feed port, an extrusion motor, a connecting pipe, and a spiral blade. The conveying pipe is fixedly installed on the top of the injection molding box, the feed port is opened at the top of the conveying pipe, and the feed port is connected to the discharge pipe. The extrusion motor is fixedly installed on the top of the injection molding box on one side of the conveying pipe, the connecting pipe is integrally arranged with one end of the bottom of the conveying pipe, one end of the spiral blade passes through the conveying pipe and is fixedly installed at the output end of the extrusion motor, and the spiral blade is arranged inside the conveying pipe.

[0008] Preferably, the injection molding box includes a box body, a lower mold, an upper mold, a control component, and a through hole. The through hole is opened on the top of the box body, and the connecting pipe extends into the interior of the injection molding box through the through hole. The lower mold is movably connected to the interior of the box body, and the upper mold is arranged directly above the lower mold. The control component is fixedly installed at the bottom of the box body on one side of the lower mold.

[0009] Preferably, the lower mold includes a lower mold body and a connecting foot integrally connected to the lower mold body, a guide column is integrally provided inside the box body, the guide column is slidably connected to the connecting foot, the outer peripheral surface of the guide column is sleeved with a support spring located below the connecting foot, the side of the lower mold body close to the control component is integrally connected with a displacement protrusion, the displacement protrusion extends into the interior of the control component, an injection hose is provided on the other side of the lower mold body, the top of the injection hose is fixedly installed with the bottom of the connecting pipe, and heaters are fixedly installed on the front and back sides of the lower mold body.

[0010] Preferably, the upper mold includes an upper mold body and a lower slide groove opened on the top of the upper mold body, the lower slide groove is slidingly connected to the lower slider, the lower slider is rotatably connected to the support rod, and the other end of the support rod is rotatably connected to the upper slider, and the top of the box body is provided with an upper slide groove, the upper slide groove is slidably connected to the upper slide block, and the adjacent upper slide blocks are integrally connected through a connecting cross bar perpendicular to the upper slide groove, and a driving motor located on one side of the upper slide groove is fixedly installed on the top of the box body, and a bidirectional screw rotatably connected to the top of the box body is fixedly installed on the output end of the driving motor, and the middle parts of the two connecting cross bars are respectively threadedly connected to different threaded segments of the bidirectional screw.

[0011] Preferably, the control assembly includes a fixing frame, a displacement frame, a through slot, a spring, a lifting spring, and a metal rod. The bottom of the fixing frame is insulated and fixedly installed with the box body, the displacement frame is slidably connected to the middle of the fixing frame, the through slot is opened on the front and rear sides of the fixing frame, the spring is fixedly installed at the upper and lower ends of the through slot, the bottom of the lifting spring is fixedly installed inside the fixing frame, the top of the lifting spring is in tight contact with the bottom of the displacement frame, the interior of the displacement frame is hollow, the displacement protrusion extends into the interior of the displacement frame, the metal rod is located at the upper and lower ends of the displacement frame, and the metal rod passes through the displacement frame and extends into the through slot.

[0012] Preferably, a protective pad located directly below the lower mold body is bonded to the bottom of the box body, and a heating tube is provided inside the tank body and the stirring rod.

[0013] Preferably, the lower slide groove and the upper slide groove correspond to each other, the lower slider and the upper slider are symmetrically arranged in the upper slide groove and the lower slide groove, one end of the support rod is rotatably connected to the lower slider, and the other end of the support rod is rotatably connected to the upper slider at the symmetrical end of the lower slider, and the middle parts of the two support rods at the junction are rotatably connected.

[0014] Preferably, the metal rod is a copper rod, and the opposite end of the spring is provided with an arc-shaped protrusion for conveniently snapping into the metal rod, and the spring is connected to the circuit of a part of the electrical appliance.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention provides a precision mold for automotive parts, which has the following beneficial effects:

[0017] 1. This kind of precision mold for automotive parts heats and stirs the injection plastic in the hot melt tank by setting a hot melt tank, a stirring motor driving a rotating shaft, and a stirring rod provided with a heating tube, so that the injection plastic is more uniform and the quality of the finished product after molding is guaranteed. The stirred injection plastic enters the feed port through the discharge slope and the discharge pipe, and the spiral blade is driven to rotate by the extrusion motor, and the injection plastic inside the delivery pipe is delivered to the injection molding box through the connecting pipe, so that the entire injection molding process is completed automatically.

[0018] 2. This kind of precision mold for automotive parts, after the injection plastic is transported into the injection molding hose through the connecting pipe, the injection plastic enters the interior of the lower mold body through the connecting hose. As the injection plastic enters the lower mold body, the weight of the lower mold body continues to increase, causing the lower mold body to move downward along the guide rod. The displacement protrusion moves downward while driving the displacement frame to move. At this time, the metal rod on the top of the displacement frame is disconnected from the spring, causing the heater to stop working. When the lower mold body is filled with injection plastic, the lower mold body drops to the lowest point, and the displacement frame that moves with the displacement protrusion is also at the lowest point, causing the metal rod at the bottom of the displacement frame to contact and conduct with the spring, causing the extrusion motor to short-circuit and stop working, and no more injection plastic is added, driving the motor path to rotate, thereby causing the connecting cross bar and the upper slider connected by the bidirectional screw thread to move, thereby pushing the upper mold body downward and closing the mold with the lower mold body to achieve uniform hot melting of the hot plastic liquid, automatic injection stop, and automatic mold closing.

[0019] 3. This kind of precision mold for automotive parts is equipped with a displacement bump. When the injection-molded product in the mold is taken out, the lower mold body moves up to the top, so that the displacement bump drives the displacement frame to move up to the top, so that the metal rod at the bottom of the displacement frame is separated from the spring, and the metal rod at the top of the displacement frame contacts the spring. The circuit of the extrusion motor and the heater is connected, so that the extrusion assembly continues to transport the injection plastic to the connecting pipe. The heater heats the lower mold body and drives the motor to conduct in the reverse direction, driving the bidirectional lead screw to rotate in the opposite direction, pulling up the upper mold body completely. When the lower mold body is filled with injection plastic, it moves down again. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the hot melt tank of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the extrusion assembly of the present invention;

[0023] Figure 4 is a cross-sectional view of an extrusion assembly of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the injection molding box of the present invention;

[0025] Figure 6 The structure of the lower mold of the present invention is shown as follows Figure 1 ;

[0026] Figure 7 The structure of the lower mold of the present invention is shown as follows Figure 2 ;

[0027] Figure 8 Schematic diagram of the structure of the control component of the present invention;

[0028] Figure 9 It is a structural schematic diagram of the fixing frame of the present invention;

[0029] Figure 10 It is a structural schematic diagram of the displacement frame of the present invention;

[0030] Figure 11 The structure of the upper mold of the present invention is schematically shown Figure 1 ;

[0031] Figure 12 The structure of the upper mold of the present invention is schematically shown Figure 2 .

[0032] Figure: 1. Hot melt tank; 11. Tank body; 12. Stirring motor; 13. Rotating shaft; 14. Stirring rod; 15. Unloading slope; 16. Unloading pipe; 2. Extrusion assembly; 21. Delivery pipe; 22. Feed port; 23. Extrusion motor; 24. Connecting pipe; 25. Spiral blade; 3. Injection molding box; 31. Box body; 32. Lower mold; 321. Lower mold body; 322. Connecting foot; 323. Guide column; 324. Support spring; 325. Injection molding hose; 326. Heating Device; 327, displacement bump; 328, protective pad; 33, upper mold; 331, upper mold body; 332, lower slide groove; 333, lower slider; 334, support rod; 335, upper slider; 336, connecting cross bar; 337, upper slide groove; 338, bidirectional screw; 339, drive motor; 34, control component; 341, fixing frame; 342, displacement frame; 343, through groove; 344, spring; 345, lifting spring; 346, metal rod; 35, through hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0034] See also Figures 1 to 12 A precision mold for automotive parts includes a hot melt tank 1, an extrusion assembly 2 and an injection molding box 3. The hot melt tank 1 is fixedly mounted on the top of the injection molding box 3 through four supporting legs. The extrusion assembly 2 is arranged between the injection molding box 3 and the hot melt tank 1. The bottom of the extrusion assembly 2 is fixedly mounted to the top of the injection molding box 3.

[0035] As an embodiment of the present invention, the hot melt tank 1 includes a tank body 11 for holding materials, and a stirring motor 12 installed on the top of the tank body 11. The bottom of the stirring motor 12 is fixedly installed with a rotating shaft 13 that passes through the top of the tank body 11, and the outer peripheral surface of the rotating shaft 13 is fixedly installed with a stirring rod 14. The bottom of the tank body 11 is provided with a discharge slope 15, and the middle part of the bottom of the tank body 11 is integrally provided with a discharge pipe 16, and the bottom of the discharge pipe 16 is fixedly connected to the top of the extrusion assembly 2.

[0036] As an embodiment of the present invention, the extrusion assembly 2 includes a delivery pipe 21, a feed port 22, an extrusion motor 23, a connecting pipe 24, and a spiral blade 25. The delivery pipe 21 is fixedly installed on the top of the injection molding box 3, the feed port 22 is opened at the top of the delivery pipe 21, the feed port 22 is connected to the discharge pipe 16, the extrusion motor 23 is fixedly installed on the top of the injection molding box 3 on one side of the delivery pipe 21, the connecting pipe 24 is integrally provided with one end of the bottom of the delivery pipe 21, and one end of the spiral blade 25 passes through the delivery pipe 21 and is fixedly installed with the output end of the extrusion motor 23. The spiral blade 25 is arranged inside the conveying pipe 21. By setting the hot melt tank 1, the stirring motor 12 drives the rotating shaft 13 and the stirring rod 14 provided with a heating tube to heat and stir the injection plastic in the hot melt tank 1, so that the injection plastic is more uniform, ensuring the quality of the finished product after molding. The stirred injection plastic enters the feed port 22 through the discharge slope 15 and the discharge pipe 16, and the spiral blade 25 is driven to rotate by the extrusion motor 23, and the injection plastic inside the conveying pipe 21 is transported into the injection molding box 3 through the connecting pipe 24, so that the entire injection molding process is automatically completed.

[0037] As an embodiment of the present invention, the injection molding box 3 includes a box body 31, a lower mold 32, an upper mold 33, a control component 34, and a through hole 35. The through hole 35 is opened at the top of the box body 31, and the connecting pipe 24 extends into the interior of the injection molding box 3 through the through hole 35. The lower mold 32 is movably connected to the interior of the box body 31, the upper mold 33 is arranged directly above the lower mold 32, and the control component 34 is fixedly installed at the bottom of the box body 31 on one side of the lower mold 32.

[0038] As an embodiment of the present invention, the lower mold 32 includes a lower mold body 321 and a connecting foot 322 integrally connected to the lower mold body 321. A guide column 323 is integrally provided inside the box body 31. The guide column 323 is slidably connected to the connecting foot 322. The outer peripheral surface of the guide column 323 is sleeved with a support spring 324 located below the connecting foot 322. The side of the lower mold body 321 close to the control component 34 is integrally connected with a displacement protrusion 327. The displacement protrusion 327 extends into the interior of the control component 34. An injection hose 325 is provided on the other side of the lower mold body 321. The top of the injection hose 325 is fixedly installed with the bottom of the connecting pipe 24. Heaters 326 are fixedly installed on the front and back sides of the lower mold body 321.

[0039] As an embodiment of the present invention, the upper mold 33 includes an upper mold body 331 and a lower slide groove 332 opened at the top of the upper mold body 331. The lower slide groove 332 is slidably connected to the lower slider 333 inside the lower slide groove 332. The lower slider 333 is rotatably connected to the support rod 334. The other end of the support rod 334 is rotatably connected to the upper slider 335. An upper slide groove 337 is provided on the top of the interior of the box body 31. The upper slide groove 337 is slidably connected to the upper slider 335. The adjacent upper sliders 335 are integrally connected through a connecting cross bar 336 that is perpendicular to the upper slide groove 337. A driving motor 339 is fixedly installed on the top of the box body 31 and is located on one side of the upper slide groove 337. The output end of the driving motor 339 is fixedly installed with a bidirectional screw 338 that is rotatably connected to the top of the box body 31. The middle parts of the two connecting cross bars 336 are respectively threadedly connected to different thread segments of the bidirectional screw 338.

[0040] The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343 and the cam 344 is fixed to the top of the cam 343. The cam 342 is fixed to the top of the cam 343. When the mold body 321 is filled with plastic, the lower mold body 321 is lowered to the lowest point, and the displacement frame 342 is disconnected from the spring 344, causing the heater 326 to stop working. When the mold body 321 is filled with plastic, the lower mold body 321 is lowered to the lowest point, and the displacement frame 342 moving with the displacement bump 327 is also at the lowest point, causing the metal rod 346 at the bottom of the displacement frame 342 to contact and conduct with the spring 344, causing the extrusion motor 23 to short-circuit and stop working. No more plastic is added, and the drive motor 339 is rotated, thereby causing the connecting cross bar 336 and the upper slider 335 to be threadedly connected to the bidirectional screw 338 to move, thereby pushing the upper mold body 331 downward to close the mold with the lower mold body 321.

[0041] As an embodiment of the present invention, a protective pad 328 located directly below the lower mold body 321 is bonded to the bottom of the box body 31 , and a heating tube is provided inside the tank body 11 and the stirring rod 14 .

[0042] As an embodiment of the present invention, the lower groove 332 corresponds to the upper groove 337, the lower slider 333 and the upper slider 335 are symmetrically arranged in the upper groove 337 and the lower groove 332, one end of the support rod 334 is rotatably connected to the lower slider 333, the other end of the support rod 334 is rotatably connected to the upper slider 335 at the symmetrical end of the lower slider 333, and the middle part of the two support rods 334 at the junction is rotatably connected. After the injection molded product in the mold is taken out, the lower mold body 321 moves up to the top, so that the displacement protrusion 327 drives the displacement The frame 342 moves up to the top, so that the metal rod 346 at the bottom of the displacement frame 342 is separated from the spring 344, and the metal rod 346 at the top of the displacement frame 342 contacts the spring 344. The circuit of the extrusion motor 23 and the heater 326 are connected, so that the extrusion assembly 2 continues to transport the injection plastic to the connecting pipe 24. The heater 326 heats the lower mold body 321 and at the same time drives the motor 339 in the reverse direction, driving the bidirectional screw 338 to rotate in the opposite direction, pulling up the upper mold body 331 completely. When the lower mold body 321 is filled with injection plastic, it moves down again.

[0043] As an embodiment of the present invention, the metal rod 346 is a copper rod, and the opposite end of the spring piece 344 is provided with an arc-shaped protrusion for conveniently snapping into the metal rod. The spring piece 344 is connected to the circuit of a part of the electrical appliance.

[0044] It should be noted that, when in use, the stirring motor 12 drives the rotating shaft 13 and the stirring rod 14 provided with a heating tube to heat and stir the injection plastic in the hot melt tank 1, so that the injection plastic is more uniform and the quality of the finished product after molding is guaranteed. The stirred injection plastic enters the feed port 22 through the discharge slope 15 and the discharge pipe 16, and the spiral blade 25 is driven to rotate by the extrusion motor 23, and the injection plastic inside the delivery pipe 21 is delivered to the injection molding box 3 through the connecting pipe 24. After the injection plastic is delivered to the injection molding hose 325 through the connecting pipe 24, the injection molding is completed. The material enters the interior of the lower mold body 321 through the connecting hose. As the injection plastic enters the lower mold body 321, the weight of the lower mold body 321 increases continuously, causing the lower mold body 321 to move downward along the guide rod. The displacement protrusion 327 moves downward while driving the displacement frame 342 to move. At this time, the metal rod 346 on the top of the displacement frame 342 is disconnected from the spring 344, causing the heater 326 to stop working. After the lower mold body 321 is filled with injection plastic, the lower mold body 321 drops to the lowest point, and the displacement frame 342, which moves together with the displacement protrusion 327, is rotated. 42 is also located at the lowest point, so that the metal rod 346 at the bottom of the displacement frame 342 contacts and conducts with the spring 344, so that the extrusion motor 23 short-circuits and stops working, no longer adding injection plastic, and the drive motor 339 rotates, thereby causing the connecting cross bar 336 and the upper slider 335 connected by the two-way screw 338 to move, thereby pushing the upper mold body 331 downward to close the mold with the lower mold body 321. After the injection molded product in the mold is taken out, the lower mold body 321 moves up to the top, so that the displacement protrusion 327 drives the displacement frame 3 42 moves up to the top, so that the metal rod 346 at the bottom of the displacement frame 342 is separated from the spring 344, and the metal rod 346 at the top of the displacement frame 342 contacts the spring 344, and the circuit of the extrusion motor 23 and the heater 326 are connected, so that the extrusion assembly 2 continues to transport the injection plastic to the connecting pipe 24, and the heater 326 heats the lower mold body 321. At the same time, the drive motor 339 is reversed, driving the bidirectional screw 338 to rotate in the opposite direction, and the upper mold body 331 is completely pulled up. When the lower mold body 321 is filled with injection plastic, it moves down again.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precision mold for automobile parts, comprising a hot melt tank (1), an extrusion assembly (2) and an injection molding box (3), characterized in that: The hot melt tank (1) is fixedly mounted on the top of the injection molding box (3) via four supporting legs, the extrusion assembly (2) is arranged between the injection molding box (3) and the hot melt tank (1), and the bottom of the extrusion assembly (2) is fixedly mounted on the top of the injection molding box (3); The hot melt tank (1) comprises a tank body (11) for holding materials, and a stirring motor (12) mounted on the top of the tank body (11); a rotating shaft (13) penetrating the top of the tank body (11) is fixedly mounted on the bottom of the stirring motor (12); a stirring rod (14) is fixedly mounted on the outer peripheral surface of the rotating shaft (13); a material discharge slope (15) is provided at the bottom of the interior of the tank body (11); a material discharge pipe (16) is integrally provided in the middle of the bottom of the tank body (11); and the bottom of the material discharge pipe (16) is fixedly connected to the top of the extrusion assembly (2); The extrusion assembly (2) comprises a delivery pipe (21), a feed port (22), an extrusion motor (23), a connecting pipe (24), and a spiral blade (25); the delivery pipe (21) is fixedly mounted on the top of the injection molding box (3); the feed port (22) is opened on the top of the delivery pipe (21); the feed port (22) is communicated with the discharge pipe (16); the extrusion motor (23) is fixedly mounted on the top of the injection molding box (3) on one side of the delivery pipe (21); the connecting pipe (24) is integrally arranged with one end of the bottom of the delivery pipe (21); one end of the spiral blade (25) penetrates the delivery pipe (21) and is fixedly mounted with the output end of the extrusion motor (23); and the spiral blade (25) is arranged inside the delivery pipe (21); The injection molding box (3) comprises a box body (31), a lower mold (32), an upper mold (33), a control assembly (34), and a through hole (35). The through hole (35) is opened at the top of the box body (31). The connecting pipe (24) extends into the interior of the injection molding box (3) through the through hole (35). The lower mold (32) is movably connected to the interior of the box body (31). The upper mold (33) is arranged directly above the lower mold (32). The control assembly (34) is fixedly mounted on the bottom of the box body (31) on one side of the lower mold (32). The lower mold (32) includes a lower mold body (321) and a connecting foot (322) integrally connected to the lower mold body (321); a guide column (323) is integrally provided inside the box (31); the guide column (323) and the connecting foot (322) are slidably connected therethrough; the outer peripheral surface of the guide column (323) is sleeved with a support spring (324) located below the connecting foot (322); a displacement protrusion (327) is integrally connected to one side of the lower mold body (321) close to the control component (34); the displacement protrusion (327) extends into the interior of the control component (34); an injection hose (325) is provided on the other side of the lower mold body (321); the top of the injection hose (325) is fixedly installed with the bottom of the connecting pipe (24); heaters (326) are fixedly installed on the front and rear sides of the lower mold body (321); The control assembly (34) comprises a fixing frame (341), a displacement frame (342), a through slot (343), a spring (344), a lifting spring (345), and a metal rod (346). The bottom of the fixing frame (341) is insulated and fixedly installed with the box body (31). The displacement frame (342) is slidably connected to the middle of the fixing frame (341). The through slot (343) is provided at the front and rear sides of the fixing frame (341). The spring (344) is fixedly installed at the through slot (343). At the upper and lower ends, the bottom of the lifting spring (345) is fixedly installed inside the fixing frame (341), the top of the lifting spring (345) is in close contact with the bottom of the displacement frame (342), the interior of the displacement frame (342) is hollow, the displacement protrusion (327) extends into the interior of the displacement frame (342), the metal rod (346) is located at the upper and lower ends of the displacement frame (342), and the metal rod (346) passes through the displacement frame (342) and extends into the through slot (343); The metal rod (346) is a copper rod, and the opposite end of the spring piece (344) is provided with an arc-shaped protrusion for conveniently clamping the metal rod. The spring piece (344) is connected to the circuit of a part of the electrical appliance.

2. The precision mold for automobile parts according to claim 1, characterized in that: The upper mold (33) includes an upper mold body (331) and a lower slide groove (332) opened on the top of the upper mold body (331). The lower slide groove (332) is slidably connected to the lower slider (333). The lower slider (333) is rotatably connected to a support rod (334). The other end of the support rod (334) is rotatably connected to an upper slider (335). An upper slide groove (337) is provided on the top of the box body (31). The upper slide groove (337) is connected to the upper slider (335). 35) sliding connection, the adjacent upper sliders (335) are integrally connected through a connecting cross bar (336) perpendicular to the upper slide groove (337), the top of the box body (31) is fixedly installed with a driving motor (339) located on one side of the upper slide groove (337), the output end of the driving motor (339) is fixedly installed with a bidirectional screw (338) rotatably connected to the top of the box body (31), and the middle parts of the two connecting cross bars (336) are respectively threadedly connected to different thread segments of the bidirectional screw (338).

3. The precision mold for automobile parts according to claim 1, characterized in that: A protective pad (328) located directly below the lower mold body (321) is bonded to the bottom of the box body (31), and a heating tube is provided inside the tank body (11) and the stirring rod (14).

4. The precision mold for automobile parts according to claim 2, characterized in that: The lower slide groove (332) and the upper slide groove (337) correspond to each other, and the lower slider (333) and the upper slider (335) are symmetrically arranged in pairs in the upper slide groove (337) and the lower slide groove (332). One end of the support rod (334) is rotatably connected to the lower slider (333), and the other end of the support rod (334) is rotatably connected to the upper slider (335) at the symmetrical end of the lower slider (333). The middle parts of the two support rods (334) at the junction are rotatably connected.

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