CN215619609U

CN215619609U - Machining die for connecting gear of automatic door of automobile

Info

Publication number: CN215619609U
Application number: CN202120880943.3U
Authority: CN
Inventors: 张远坚; 廖龙军
Original assignee: Tianjin Yuangu Technology Co ltd
Current assignee: Tianjin Yuangu Technology Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2022-01-25
Anticipated expiration: 2031-04-27

Abstract

The application relates to a processing mold of an automobile automatic door connecting gear, which relates to the technical field of gear processing molds and comprises an upper mold body and a lower mold body which are detachably connected, wherein the upper surface of the lower mold body is rotatably connected with an injection molding shell, the injection molding shell is positioned in the lower mold body, the upper surface of the injection molding shell is provided with an injection molding hole, and the upper mold body is provided with an injection molding device; the bottom of the lower die body is provided with a supporting plate, the upper surface of the supporting plate is provided with a supporting groove, the bottom wall in the supporting groove is fixedly provided with an ejection cylinder, the upper surface of the ejection cylinder is fixedly provided with an ejection plate, the upper surface of the ejection plate is fixedly provided with an ejection rod, and after the lower die body is penetrated by the ejection rod, the top end of the ejection rod is flush with the bottom wall in the injection hole; the ejector plate upper surface sets firmly the stripper plate, and the stripper plate runs through the lower mould body, and the stripper plate lateral wall sets firmly the demoulding piece, and the demoulding groove has been seted up to the shell outer wall of moulding plastics, and demoulding piece and demoulding groove inner wall butt drive when the stripper plate reciprocates moulds the shell and rotates, and this application has the effect that improves helical gear drawing of patterns efficiency.

Description

Machining die for connecting gear of automatic door of automobile

Technical Field

The application relates to the technical field of gear machining dies, in particular to a machining die for a connecting gear of an automatic automobile door.

Background

The helical gear is different from a common gear, the teeth of the helical gear are obliquely arranged, the transmission of the helical gear is superior to that of a straight gear, and the helical gear can be used for high-speed heavy-load transmission and also has application on an automatic door of an automobile.

In the correlation technique, the helical gear can be produced through moulding plastics, and the helical gear is moulded plastics the back and is accomplished, when carrying out the drawing of patterns, generally ejecting with helical gear from the mould shell in the mould shell through top mould device, because the skewed tooth effect of helical gear, the in-process that the helical gear shifts up can drive the mould shell and rotate, and then accomplishes the drawing of patterns of helical gear.

When part helical gear is moulded plastics and is produced, will form a complete set of assembly work piece and place in the mould shell, helical gear forms an organic whole with supporting work piece after accomplishing with forming a complete set.

In view of the above-mentioned related art, the inventor believes that there is a defect that the ejector is difficult to take out the helical gear from the mold case when the inclination angle of the helical gear is large.

SUMMERY OF THE UTILITY MODEL

When the inclination of improving helical gear is great, ejector is difficult to take out the defect from the mould shell with the helical gear, this application provides a mold processing of car automatically-controlled door connecting gear.

The application provides a mold processing of car automatically-controlled door connecting gear adopts following technical scheme:

a processing mold for an automobile automatic door connecting gear comprises an upper mold body and a lower mold body, wherein the upper mold body is detachably connected with the upper surface of the lower mold body, the middle position of the upper surface of the lower mold body is rotatably connected with an injection molding shell, the injection molding shell is positioned in the lower mold body, the upper surface of the injection molding shell is provided with an injection molding hole for injection molding of a bevel gear, the upper surface of the lower mold body is provided with a workpiece groove for placing a preset workpiece, the workpiece groove is communicated with the injection molding hole, and the upper mold body is provided with an injection molding device for injection molding of the injection molding hole;

the bottom of the lower die body is provided with a supporting plate, the upper surface of the supporting plate is provided with a supporting groove, the bottom wall in the supporting groove is fixedly provided with an ejection cylinder, the upper surface of the ejection cylinder is fixedly provided with an ejection plate, the upper surface of the ejection plate is fixedly provided with an ejection rod, and after the lower die body is penetrated by the ejection rod, the top end of the ejection rod is flush with the bottom wall in the injection hole;

the upper surface of the ejector plate is fixedly provided with a demoulding plate, the demoulding plate penetrates through the lower mould body, the side wall of the demoulding plate is fixedly provided with a demoulding block, the outer wall of the injection moulding shell is provided with a demoulding groove, the demoulding block is abutted against the inner wall of the demoulding groove, and the injection moulding shell is driven to rotate along with the separation of the bevel gear when the demoulding plate moves up and down.

Through adopting above-mentioned technical scheme, place the work piece of predetermineeing in the work piece inslot before the compound die, carrying out the compound die, make upper die body and lower mould body butt each other, and then seal the hole of moulding plastics, carry out the moulding plastics of helical gear to the hole of moulding plastics through the device of moulding plastics, after the completion of moulding plastics, make upper die body and lower mould body separation, rethread liftout cylinder makes the liftout plate shift up, and then make liftout rod and stripper plate shift up together, the liftout rod moves up helical gear and predetermine the work piece together, simultaneously the stripper plate passes through demoulding piece and drawing of patterns groove butt, and then drive and mould the shell and rotate, because the pivoted range of the shell of moulding plastics is the same with the rotation range that takes place when the helical gear shifts up, and then effectual drive helical gear takes out from the shell of moulding plastics, the effectual efficiency that improves the helical gear drawing of patterns, still improved the guard effect to the helical gear.

Optionally, the ejector rod is provided with a plurality of on the ejector plate, and the ejector rod still stretches into the work piece inslot and predetermines work piece lower surface butt, and all the other ejector rod tops all with helical gear lower surface butt.

Through adopting above-mentioned technical scheme, when the liftout plate drove the liftout rod and shifts up, the liftout rod top respectively with predetermine the lower surface butt of work piece bottom and helical gear, and then carry out effectual support to the helical gear with predetermine the work piece, improved the ejecting efficiency of the drawing of patterns of helical gear.

Optionally, the lower surface of the upper die body is provided with an ejection groove, an ejection column is slidably abutted against the inner wall of the ejection groove, a demoulding spring is arranged on the surface of the ejection column, the top end of the demoulding spring is fixedly connected with the top wall in the ejection groove, and when the demoulding spring is in a natural state, the ejection column partially extends out of the ejection groove; when the die is closed, the bottom end of the ejection column is abutted against the upper surface of the preset workpiece.

By adopting the technical scheme, when the upper die body and the lower die body are separated, the bottom end of the ejection column is separated from the ejection groove under the action of the demoulding spring, so that the bevel gear is separated from the upper die body, and the stability of the position of the bevel gear and a preset workpiece is effectively improved when the upper die body and the lower die body are separated; when the die is closed, the ejection column is tightly ejected to the top end of the preset workpiece, so that the stability of the position of the preset workpiece is further improved, and the production quality of the bevel gear is further improved.

Optionally, the upper surface of the ejection column is provided with a vent hole, the upper die body is provided with an exhaust hole communicated with the vent hole, and the exhaust hole is communicated with the outside.

By adopting the technical scheme, when the injection molding is carried out, the air part in the injection molding hole is discharged outwards through the air vent and the exhaust hole, so that the exhaust efficiency of the injection molding hole is improved, and the production quality of the bevel gear is further improved.

Optionally, the lower die body has just seted up the rotation annular to the part of the shell circumference outer wall of moulding plastics, and the roof has set firmly first crown plate in the rotation annular, and the shell circumference outer wall bottom of moulding plastics has set firmly the second crown plate, and the rotation annular has all been seted up to the outer wall that first crown plate and second crown plate are relative, and the rotation annular is interior to be butted to have a plurality of balls, and the ball is in two rotation annular inner wall butts simultaneously.

Through adopting above-mentioned technical scheme, when the shell of moulding plastics rotates, drive the second crown plate and rotate, the second crown plate makes ball and first crown plate butt slide, the effectual shell pivoted efficiency that moulds plastics that has improved rotates the effectual shell pivoted stability that has improved of annular, and then has improved the efficiency of helical gear drawing of patterns.

Optionally, the first ring plate is separated from the injection molding shell, and the second ring plate is separated from the inner wall of the rotating ring groove.

Through adopting above-mentioned technical scheme, the position of first crown plate and second crown plate sets up the effectual frictional force that receives when having reduced the shell of moulding plastics and rotating, and then has improved the shell pivoted efficiency of moulding plastics.

Optionally, a protection groove is formed in the upper surface of the lower die body, the top of the injection molding shell and the top of the stripper plate are located in the protection groove, a protection plate is installed in the protection groove, and the protection plate avoids the injection molding shell and the stripper plate and abuts against the outer wall of the injection molding shell and the outer wall of the stripper plate.

Through adopting above-mentioned technical scheme, guard plate and the shell of moulding plastics and stripper plate butt, the effectual protection effect to the lower die body that has improved, and then improved the life of mold processing.

Optionally, the stabilizer slot has been seted up to the guard plate lateral wall, and the guard plate is provided with the steady block that slides with the stabilizer slot inner wall butt, and the steady block slides with the stabilizer slot butt all the time.

Through adopting above-mentioned technical scheme, when the stripper plate moved, the stable piece slided with the inner wall butt of stable groove, and the effectual stability that improves the stripper plate and slided, and then improved the efficiency of helical gear drawing of patterns.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the upper die body and the lower die body are separated, a preset workpiece is placed in a workpiece groove, then die assembly is carried out, after the injection molding production of the bevel gear is completed, the upper die body and the lower die body are separated, the ejection column extends out of the ejection groove from the bottom under the action of the demolding spring, the efficiency of separating the bevel gear from the upper die body is effectively improved, the ejection column is tightly ejected with the preset workpiece during die assembly, the position fixing stability of the preset workpiece is effectively improved, and the quality of bevel gear production is improved;

2. the ejection cylinder drives the ejection plate to move upwards, so that the ejection rod and the demoulding plate move upwards together, the ejection rod drives the preset workpiece and the helical gear to move upwards together, the demoulding plate is abutted and slides against the demoulding groove through the demoulding block, so that the injection moulding shell is driven to rotate with the same amplitude along with the upwards movement of the helical gear, the helical gear is driven to be separated from the injection moulding shell in an auxiliary manner, the demoulding efficiency of the helical gear is effectively improved, and the production quality of the helical gear is improved;

3. when the shell of moulding plastics rotates, drive the second crown plate and rotate, and then make the butt annular butt of ball and first crown plate slide, the effectual shell pivoted efficiency of moulding plastics that has improved, and then improved the stability of helical gear drawing of patterns.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

fig. 2 is a sectional view showing an injection molded case;

FIG. 3 is a partial exploded view showing the ejection assembly;

FIG. 4 is a partial cross-sectional view showing the rotating assembly;

fig. 5 is an enlarged view of a portion a of fig. 4 showing a stabilizing member.

In the figure, 1, an upper mold body; 11. a first top plate; 111. an injection molding device; 12. a second top plate; 121. a roof plate groove; 122. a top template; 1221. ejecting the groove; 1222. a drop-proof groove; 123. an exhaust hole; 2. a lower die body; 21. a rotating groove; 211. rotating the ring groove; 22. injecting a plastic shell; 221. injection molding holes; 222. a demoulding groove; 23. fixing the bottom plate; 231. a workpiece groove; 24. a protective bath; 241. a protection plate; 2411. a stabilizing block; 3. a support plate; 31. a support groove; 4. ejecting the assembly; 41. ejecting the cylinder; 42. ejecting the plate; 43. ejecting the rod; 44. a stripper plate; 441. demoulding; 442. a stabilizing slot; 5. a rotating assembly; 51. a first ring plate; 52. a second ring plate; 521. abutting against the ring groove; 5211. a ball bearing; 6. a stabilizing assembly; 61. ejecting the column; 611. a vent hole; 612. a spring slot; 613. an anti-slip ring plate; 62. and (5) demolding the spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses mold processing of automobile automatic door connecting gear.

Referring to fig. 1, the mold for machining the connection gear of the automatic door of the automobile comprises an upper mold body 1, a lower mold body 2 and a support plate 3, wherein the lower mold body 2 is fixedly arranged on the upper surface of the support plate 3, and the lower surface of the upper mold body 1 is abutted to the upper surface of the upper mold body 1 and is detachably connected with the upper surface of the upper mold body.

With reference to fig. 2, the upper mold body 1 includes a first top plate 11 and a second top plate 12, the first top plate 11 is disposed on the upper surface of the second top plate 12, a top plate groove 121 is disposed in the middle of the lower surface of the second top plate 12, a top mold plate 122 is disposed in the top plate groove 121, an injection molding device 111 is inserted in the middle of the first top plate 11, the injection molding device 111 is a whole formed by a plurality of injection molding pipes, after the injection molding device 111 penetrates the second top plate 12 and the top mold plate 122, the bottom end of the injection molding device is flush with the lower surface of the top mold plate 122, the plurality of injection molding pipes of the injection molding device 111 are drawn together to the middle of the second top plate 12 to form a single injection molding opening, and the injection molding opening of the injection molding device 111 penetrates the top of the first top plate 11.

Lower die body 2 upper surface intermediate position has been seted up and has been rotated groove 21, it has been seted up and has been rotated annular 211 to rotate 21 circumference inner wall bottoms in groove, the bottom wall has set firmly PMKD 23 in the rotation groove 21, PMKD 23 intermediate position upwards is protruding to be the column, the shell of moulding plastics 22 circumference inner wall is rotated with PMKD 23 middle protruding department and is connected, the shell of moulding plastics 22 circumference outer wall still rotates with rotation groove 21 and is connected, mould plastics the shell 22 upper surface intermediate position and has seted up injection molding hole 221, PMKD 23 upper surface intermediate position is seted up and is supplied to predetermine the vertical standing groove including placing of work piece.

When the second top plate 12 is fastened to the lower mold body 2, the top mold plate 122, the injection hole 221, and the upper surface of the middle protrusion of the fixing base plate 23 together constitute a space for performing helical gear injection. The lower die body 2 is provided with an ejection assembly 4 for demoulding the formed gear; the injection molding shell 22 is provided with a rotating assembly 5 for improving the self rotating efficiency; the top die plate 122 is provided with a stabilizing member 6 for improving the positional stability of the predetermined workpiece in the workpiece slot 231.

Before injection molding, the second top plate 12 is separated from the lower die body 2, a preset workpiece is placed in the workpiece groove 231, the part of the preset workpiece is located in the workpiece groove 231, the second top plate 12 is buckled with the lower die body 2, mold assembly is completed, the stability of the preset workpiece placed in the lower die body 2 is effectively improved through the stabilizing component 6 and the workpiece groove 231, injection molding processing of the bevel gear is carried out on the injection molding hole 221 through an injection molding opening of the injection molding device 111, and the preset workpiece and the bevel gear are combined while injection molding production of the bevel gear is carried out, so that the efficiency and the quality of the injection molding production of the bevel gear are improved; during the drawing of patterns, earlier with second roof 12 and lower mould body 2 separation, the rethread drawing of patterns subassembly carries out the drawing of patterns to the helical gear, makes the mould of moulding plastics shell 22 take the initiative and then carry out supplementary drawing of patterns when drawing of patterns, and runner assembly 5 has improved the rotation efficiency of the shell 22 of moulding plastics, has improved the effect of helical gear drawing of patterns together.

Referring to fig. 3, the ejection assembly 4 includes an ejection cylinder 41, an ejection plate 42, ejection rods 43 and a stripper plate 44, the support groove 31 is formed in the middle position of the upper surface of the support plate 3, the ejection cylinder 41 is fixedly disposed in the middle position of the bottom wall of the ejection groove 1221, the ejection cylinder 41 is a vertically disposed hydraulic cylinder, the ejection plates 42 are horizontally and fixedly disposed on the upper surface of the hydraulic cylinder, the ejection rods 43 are vertically disposed, one of the ejection rods 43 is fixedly disposed in the middle position of the upper surface of the ejection plate 42, and the lower mold body 2 and the fixed bottom plate 23 are sequentially penetrated and then communicated with the bottom of the workpiece groove 231; the rest of the ejector rods 43 are uniformly distributed around the middle position of the ejector plate 42, and sequentially penetrate the lower mold body 2 and the fixed bottom plate 23 to be flush with the upper surface of the fixed bottom plate 23.

The demoulding plate 44 is vertically and fixedly arranged at one side of the length direction of the upper surface of the ejecting plate 42, the demoulding plate 44 penetrates through the upper die body 1, the top end of the demoulding plate is flush with the upper surface of the upper die body 1, one side of the demoulding plate 44, which is close to the injection molding shell 22, extends towards the demoulding shell and is abutted against the circumferential outer wall of the demoulding shell, the top of the outer side wall of the injection molding shell 22 is provided with a demoulding groove 222 which is the same as the helical amplitude of the produced helical gear, the demoulding block 441 is fixedly arranged at the position of the demoulding plate 44, which is just opposite to the demoulding groove 222, and the demoulding block 441 is abutted against the inner wall of the demoulding groove 222.

After the second top plate 12 and the lower die body 2 are separated, the helical gear is demolded, the ejection cylinder 41 drives the ejection plate 42 to move upwards, the ejection plate 42 enables the ejection rod 43 and the demolding plate 44 to move upwards together, and the ejection rod 43 abuts against the bottom of the preset workpiece and the lower surface of the helical gear when moving upwards to drive the preset workpiece to move upwards; in the process of upward moving of the bevel gear, the teeth of the bevel gear are abutted against the inner wall of the injection molding hole 221, so that the injection molding housing 22 is driven to rotate, and meanwhile, in the process of upward moving of the demolding plate 44, the demolding block 441 is abutted against the inner wall of the demolding groove 222 to slide, so that the injection molding housing 22 is driven to rotate along with the upward moving of the bevel gear, the bevel gear is taken out without upward moving in a rotating manner, and the demolding effect of the bevel gear is improved; because the demoulding piece 441 drives the injection molding housing 22 to rotate, the force applied to the teeth when the bevel gear moves upwards is effectively reduced, the protection effect on the bevel gear is further improved, and the quality of the stripped bevel gear is improved.

Referring to fig. 3 and 4, the rotating assembly 5 includes a first annular plate 51 and a second annular plate 52, the first annular plate 51 is fixedly disposed on the inner top wall of the rotating annular groove 211 and is not abutted to the injection molding shell 22, the second annular plate 52 is fixedly disposed on the bottom of the circumferential outer wall of the injection molding shell 22 and is located below the first annular plate 51, the second annular plate 52 is not abutted to the inner wall of the rotating annular groove 211, the outer walls of the first annular plate 51 and the second annular plate 52 opposite to each other are both provided with abutting annular grooves 521, a plurality of balls 5211 are abutted to the two abutting annular grooves 521, and the second annular plate 52 tightly abuts the balls 5211 against the first annular plate 51.

When the demoulding piece 441 drives the injection molding shell 22 to rotate, the injection molding shell 22 drives the second annular plate 52 to rotate, the second annular plate 52 slides in a butting joint with the inner wall of the butting joint ring groove 521 of the first annular plate 51 through the ball 5211, the rotating stability of the injection molding shell 22 is effectively improved, the rotating efficiency of the injection molding shell 22 is also improved, meanwhile, the first annular plate 51 is separated from the injection molding shell 22, the second annular plate 52 is separated from the inner wall of the butting joint ring groove 521, the rotating stability of the injection molding shell 22 is effectively improved, and further the demolding effect of the bevel gear is improved.

Referring to fig. 3, a protection groove 24 is formed in the middle of the upper surface of the upper housing, the protection groove 24 is communicated with the rotating groove 21, a protection plate 241 is installed on the inner wall of the protection groove 24, the protection plate 241 is opened at the positions of the injection molding shell 22 and the stripper plate 44 to avoid, and is abutted against the injection molding shell 22 and the stripper plate 44, a stabilizing groove 442 is formed in a pair of opposite side walls of the stripper plate 44 along the vertical direction, and a stabilizing block 2411 abutted against the inner wall of the stabilizing groove 442 is fixedly arranged on the part of the protection plate 241, which is opposite to the stabilizing groove 442.

In the process that the stripper plate 44 moves upwards along with the ejector plate 42, the stripper plate 44 drives the stabilizing groove 442 to abut against and slide with the stabilizing plate, so that the sliding stability of the stripper plate 44 is effectively improved; meanwhile, the protection plate 241 effectively improves the protection effect on the lower die body 2, and only the protection plate 241 is replaced when the abrasion is caused, so that the service life of the processing die is effectively prolonged.

Referring to fig. 4 and 5, the stabilizing assembly 6 includes an ejection post 61 and a demoulding spring 62, an ejection groove 1221 for the ejection post 61 to abut against is formed in the middle of the lower surface of the top template 122, the top template 122 is penetrated through the ejection groove 1221, and when the top end of the ejection post 61 abuts against the inner top wall of the top plate groove 121, the bottom end of the ejection post 61 is flush with the top template 122; the middle position of the upper surface of the ejection column 61 is provided with a spring groove 612 for placing the demolding spring 62, the spring groove 612 is further arranged at the middle position of the inner top wall of the top plate groove 121, the top end of the demolding spring 62 is fixedly connected with the inner top wall of the spring groove 612 at the top, the bottom end of the demolding spring 62 is fixedly connected with the inner bottom wall of the spring groove 612 at the bottom, and when the demolding spring 62 is in a natural state, the bottom part of the ejection column 61 extends out of the ejection groove 1221.

Anti-disengaging groove 1222 has been seted up to ejecting groove 1221 circumference outer wall top, and ejecting post 61 circumference outer wall top has set firmly anti-disengaging ring plate 613, and anti-disengaging ring plate 613 is located anti-disengaging groove 1222, and the ascending length in the vertical direction of anti-disengaging ring plate 613 is less than the ascending length in the vertical direction of anti-disengaging groove 1222, and ejecting post 61 is located and predetermines the work piece position directly over.

A vent hole 611 is formed in the middle of the inner bottom wall of the spring groove 612 of the ejection column 61, an exhaust hole 123 is formed in the inner top wall of the spring groove 612 of the second top plate 12, and the exhaust hole 123 is communicated with the outside.

When the mold is closed, the bottom end of the ejection column 61 abuts against the top end of the preset workpiece, and the demolding spring 62 is in a compressed state, so that the stability of the position of the preset workpiece is effectively improved, and when the injection molding is carried out, the gas in the injection molding hole 221 flows to the outside through the vent hole 611 and the exhaust hole 123, so that the discharging efficiency of the gas in the injection molding hole 221 during the injection molding is effectively improved, and the production quality of the injection molding of the bevel gear is further improved; during mold splitting, the second top plate 12 is separated from the lower mold body 2, and the bottom of the ejection column 61 extends out of the ejection groove 1221 under the action of the demolding spring 62, so that the effect of separating the bevel gear from the top mold plate 122 is improved; the anti-slip ring plate 613 reduces the probability of the ejection column 61 being disengaged from the ejection groove 1221, and improves the stability of the ejection column 61 in slipping.

The implementation principle of the machining die for the automobile automatic door connecting gear is as follows: when the helical gear is produced, the second top plate 12 is separated from the lower die body 2, then a preset workpiece is placed in the workpiece groove 231, the second top plate 12 is moved, the top die plate 122, the injection molding hole 221 and the fixed bottom plate 23 form an injection molding space of the helical gear together, and the injection molding device 111 performs injection molding on the injection molding hole 221 to form the helical gear; after the injection molding is completed, the mold is divided, so that the second top plate 12 is separated from the lower mold body 2, the ejector cylinder 41 drives the ejector plate 42 to move, and then the ejector rod 43 and the stripper plate 44 are driven to move together, the ejector rod 43 drives the bevel gear to move upwards, in the process of moving upwards the bevel gear, the stripper plate 44 drives the injection molding housing 22 to rotate through the mode of abutting against the stripping module 441 and the stripping groove 222, the pressure of the bevel gear on the bevel gear during the demoulding process is effectively reduced, and the demoulding effect of the bevel gear is effectively improved.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a mold processing of gear is connected to car automatically-controlled door, includes die body (1) and lower die body (2), goes up die body (1) and can dismantle with lower die body (2) upper surface and be connected its characterized in that: the middle position of the upper surface of the lower die body (2) is rotatably connected with a plastic injection shell (22), the plastic injection shell (22) is positioned in the lower die body (2), the upper surface of the plastic injection shell (22) is provided with an injection molding hole (221) for injection molding of a helical gear, the upper surface of the lower die body (2) is provided with a workpiece groove (231) for placing a preset workpiece therein, the workpiece groove (231) is communicated with the injection molding hole (221), and the upper die body (1) is provided with an injection molding device (111) for injection molding of the injection molding hole (221);

the bottom of the lower die body (2) is provided with a supporting plate (3), the upper surface of the supporting plate (3) is provided with a supporting groove (31), the inner bottom wall of the supporting groove (31) is fixedly provided with an ejection cylinder (41), the upper surface of the ejection cylinder (41) is fixedly provided with an ejection plate (42), the upper surface of the ejection plate (42) is fixedly provided with an ejection rod (43), and after the lower die body (2) is penetrated by the ejection rod (43), the top end of the ejection rod is flush with the inner bottom wall of the injection molding hole (221);

the upper surface of the ejector plate (42) is fixedly provided with a demoulding plate (44), the lower die body (2) is penetrated through by the demoulding plate (44), the side wall of the demoulding plate (44) is fixedly provided with a demoulding block (441), the outer wall of the injection molding shell (22) is provided with a demoulding groove (222), the demoulding block (441) is abutted against the inner wall of the demoulding groove (222), and the injection molding shell (22) is driven to rotate along with the separation of the bevel gear when the demoulding plate (44) moves up and down.

2. The mold for machining the connecting gear of the automatic door of the automobile according to claim 1, wherein: the ejection rods (43) are arranged on the ejection plate (42) in a plurality, the ejection rods (43) further extend into the workpiece groove (231) to abut against the lower surface of a preset workpiece, and the top ends of the rest ejection rods (43) are abutted against the lower surface of the bevel gear.

3. The mold for machining the connecting gear of the automatic door of the automobile according to claim 1, wherein: the lower surface of the upper die body (1) is provided with an ejection groove (1221), the inner wall of the ejection groove (1221) is abutted and slid with an ejection column (61), the surface of the ejection column (61) is provided with a demoulding spring (62), the top end of the demoulding spring (62) is fixedly connected with the inner top wall of the ejection groove (1221), and when the demoulding spring (62) is in a natural state, part of the ejection column (61) extends out of the ejection groove (1221); when the die is closed, the bottom end of the ejection column (61) is abutted against the upper surface of a preset workpiece.

4. The mold for machining the connecting gear of the automatic door of the automobile according to claim 3, wherein: the upper surface of the ejection column (61) is provided with a vent hole (611), the upper die body (1) is provided with an exhaust hole (123) communicated with the vent hole (611), and the exhaust hole (123) is communicated with the outside.

5. The mold for machining the connecting gear of the automatic door of the automobile according to claim 1, wherein: lower die body (2) just have seted up rotation annular (211) to the part of moulding the shell (22) circumference outer wall, rotate annular (211) inner ceiling wall and have set firmly first crown plate (51), mould shell (22) circumference outer wall bottom and have set firmly second crown plate (52), rotation annular (211) have all been seted up to first crown plate (51) and second crown plate (52) relative outer wall, it has a plurality of balls (5211) to rotate annular (211) internal butt, ball (5211) rotate annular (211) inner wall butt in two simultaneously.

6. The mold for machining the connecting gear of the automatic door of the automobile according to claim 4, wherein: the first annular plate (51) is separated from the injection molding shell (22), and the second annular plate (52) is separated from the inner wall of the rotating ring groove (211).

7. The mold for machining the connecting gear of the automatic door of the automobile according to claim 1, wherein: a protection groove (24) is formed in the upper surface of the lower die body (2), the top of the injection molding shell (22) and the top of the demolding plate (44) are located in the protection groove (24), a protection plate (241) is installed in the protection groove (24), the protection plate (241) avoids the injection molding shell (22) and the demolding plate (44), and the protection plate abuts against the outer wall of the injection molding shell (22) and the outer wall of the demolding plate (44).

8. The mold for machining the connecting gear of the automatic door of the automobile according to claim 7, wherein: the side wall of the protection plate (241) is provided with a stabilization groove (442), the protection plate (241) is provided with a stabilization block (2411) which is abutted and slid against the inner wall of the stabilization groove (442), and the stabilization block (2411) is always abutted and slid against the stabilization groove (442).