CN214820384U - Injection mold of spindle nut - Google Patents

Abstract

The utility model relates to an injection mold of main shaft nut, it includes cope match-plate pattern and the lower bolster that is located the cope match-plate pattern below, the fixed mould benevolence that inlays in cope match-plate pattern bottom, the fixed mould benevolence that inlays in lower bolster top is equipped with down mould benevolence, the chamber of moulding plastics is formed in the concatenation between lower mould benevolence and the last mould benevolence, mould plastics the intracavity and be provided with the plug, be provided with interior shaping screw thread on the plug, the coaxial connecting rod that is fixed with of one end of plug, be connected with drive assembly on the connecting rod, drive assembly includes drive gear, drive rack and driving piece, the coaxial fixed cover of drive gear is established on the connecting rod, drive gear and drive rack intermeshing, the driving piece is fixed to be set up on the lower bolster, the driving piece is connected with the drive rack, and be used for making the drive rack along the length direction removal of drive rack. The core rod demoulding device has the effects of keeping the rotating speed of the core rod uniform and enabling the rotating speeds of the core rods to be consistent in the demoulding process of different spindle nuts, so that the condition that the quality of the spindle nuts of the same model is uneven is avoided.

Description

Injection mold of spindle nut

Technical Field

The application relates to the field of injection molds, in particular to an injection mold of a spindle nut.

Background

The main shaft nut is an important part of the automobile trunk telescopic stay bar. An existing spindle nut, as shown in fig. 1, includes a spindle nut body 0, a nut head 01 is integrally sleeved at one end of the spindle nut body 0, an external thread 02 is provided at the other end, a through center hole 03 is provided at the axis of the spindle nut body 0, and an internal thread 031 is provided in the center hole 03.

The existing injection mold comprises an upper template and a lower template, an upper mold core is fixedly embedded in the bottom of the upper template, a lower mold core is fixedly embedded in the top of the lower template, and an injection molding cavity in the shape of an injection molding piece is formed by splicing the upper mold core and the lower mold core. When the injection molding machine is used for injection molding, high-temperature molten plastic is injected into the injection molding cavity, the injection molding cavity is completely filled with the plastic, an injection molding piece can be formed after the plastic is cooled, the upper mold core and the lower mold core are separated from each other, and the injection molding piece is taken out. For the spindle nut, because the spindle nut is provided with the central hole and the central hole is internally provided with the internal thread, the injection mold of the injection molding piece generally arranges the core rod in the injection molding cavity, and the core rod is provided with the internal molding thread matched with the internal thread, and after the spindle nut is cooled and molded, the core rod rotates along the spiral line of the internal thread, so that the core rod is taken out from the molded spindle nut.

In view of the above-mentioned related technologies, the inventor believes that when an existing spindle nut is demolded, a core rod needs to be manually rotated, and it is difficult to ensure that the rotation speed remains unchanged in the whole process, so that the abrasion amounts of the core rod on different positions of the internal thread of the spindle nut are not uniform, and the abrasion amounts of the internal thread of different spindle nuts are different, which not only seriously affects the forming quality of the spindle nut, but also makes the quality of the spindle nut of the same model uneven.

SUMMERY OF THE UTILITY MODEL

In order to control the rotating speed of the core rod conveniently, the rotating speed change of the core rod is reduced, and the rotating speeds of the core rod are consistent in the demolding process of different spindle nuts, so that the condition that the quality of the spindle nuts of the same type is uneven is avoided.

The application provides a main shaft nut's injection mold adopts following technical scheme:

the utility model provides an injection mold of main shaft nut, include cope match-plate pattern and the lower bolster that is located the cope match-plate pattern below, the fixed mould benevolence that inlays in cope match-plate pattern bottom, the fixed mould benevolence that inlays in lower bolster top is equipped with lower mould benevolence, the chamber of moulding plastics is formed in the concatenation between lower mould benevolence and the last mould benevolence, mould plastics and be provided with the plug in the intracavity, be provided with interior shaping screw thread on the plug, the coaxial connecting rod that is fixed with of one end of plug, be connected with drive assembly on the connecting rod, drive assembly includes drive gear, drive rack and driving piece, the coaxial fixed cover of drive gear is established on the connecting rod, drive gear and drive rack intermeshing, the driving piece is fixed to be set up on the lower bolster, the driving piece is connected with the drive rack, and be used for making the drive rack along the length direction removal of drive rack.

Through adopting above-mentioned technical scheme, after spindle nut injection moulding, make the driving piece drive the driving rack along the length direction uniform movement of driving rack, because driving rack and drive gear intermeshing, the driving rack can drive gear and take place to rotate, and drive the connecting rod and rotate around its axis, the connecting rod can drive the core rod and take place to rotate this moment, and make the core rod spiral rotate in the cover of loosing core, through making the driving piece drive driving rack uniform movement, make the slew velocity of plug more even and be convenient for control, reduce the rotational speed change of plug, and make the rotational speed of different spindle nut drawing of patterns in-process plug unanimous, thereby avoid appearing the uneven condition of quality of same model spindle nut, the shaping quality of spindle nut has been improved.

Preferably, the injection molding cavity is provided in plurality.

Through adopting above-mentioned technical scheme, set up a plurality of chambeies of moulding plastics between upper die benevolence and lower mould benevolence, can make a plurality of main shaft nuts of injection mold one shot forming to the efficiency of moulding plastics has effectively been improved.

Preferably, a plurality of injection molding cavities are distributed along the length direction of the driving rack, the driving gears are arranged in a plurality and are in one-to-one correspondence with the connecting rods on the core rods in each injection molding cavity, and the driving gears are meshed with the driving rack.

Through adopting above-mentioned technical scheme, when the driving piece made the drive rack remove along the length direction of drive rack, because the drive rack meshes with a plurality of drive gears simultaneously, the drive rack can drive a plurality of drive gears and rotate simultaneously to make drive gear drive a plurality of connecting rods and the plug rotates simultaneously, not only realized the simultaneous demoulding process to a plurality of plugs, also can make the slew velocity of a plurality of plugs keep unanimous, thereby avoid appearing the uneven condition of a plurality of injection molding quality.

Preferably, the core rod is detachably connected with the connecting rod.

By adopting the technical scheme, the spindle nut has various models, and the characteristics of the pitch, the tooth shape and the like of the internal thread in the central hole of the spindle nut with different models are different. Make plug and connecting rod be for dismantling to be connected, can follow the connecting rod with the plug and take off to change the plug, make injection mold can be applicable to the main shaft nut of the different models of moulding plastics.

Preferably, one end of the core rod, which is close to the connecting rod, is fixedly provided with a first inserting rod, the first inserting rod is inserted into the connecting rod, a first slot is formed in the first inserting rod, a first bolt is arranged on the connecting rod in a penetrating manner, and the first bolt is inserted into the first slot.

Through adopting above-mentioned technical scheme, when the plug on the connecting rod needs to be changed, take out first bolt from first slot, then take out first inserted bar from the connecting rod to change the plug, insert the connecting rod with the first inserted bar on the plug after changing again, then insert first bolt in the first slot on the first inserted bar, thereby realize the change process to the plug, make the change process of plug more convenient and easy operation.

Preferably, a clamping seat is fixedly arranged at the bottom of the upper template, and the clamping seat is meshed with the driving rack.

Through adopting above-mentioned technical scheme, during moulding plastics, because cassette and drive rack intermeshing, drive rack can play limiting displacement to drive rack, avoids drive rack to remove along its length direction because of the maloperation to avoid drive rack to drive the plug and rotate and influence the forming process of main shaft nut between upper die benevolence and lower die benevolence. After finishing moulding plastics, need take off the cope match-plate pattern from the lower bolster, cassette and drive rack looks mutual separation this moment avoids the cassette to produce the influence to the removal process of drive rack.

Preferably, the lower template is connected with the driving rack in a sliding manner along the length direction of the driving rack.

Through adopting above-mentioned technical scheme, when driving piece drive rack removed along its length direction, drive rack and lower bolster relative slip to make the removal process of drive rack more stable, avoid drive rack to take place the skew at the removal in-process.

Preferably, one end of the core rod, which is far away from the connecting rod, is provided with a limiting rod, the limiting rod is provided with a limiting hole with a circular cross section, a plug is coaxially fixed on the core rod, and the plug is inserted into the limiting hole.

Through adopting above-mentioned technical scheme, when moulding plastics, the cutting is inserted in spacing downthehole, and the gag lever post not only can play the supporting role to the plug, avoids the plug to take place to warp, can also play limiting displacement to the axial position of plug, ensures the accuracy of plug axial position in the injection molding intracavity to main shaft nut's shaping quality has been guaranteed.

Preferably, the limiting rod is fixedly connected with a limiting seat, the limiting seat is in sliding connection with the lower template along the axis direction of the core rod, a pushing seat is arranged on the limiting seat, the pushing seat is fixedly connected with the upper template, a push rod is fixedly arranged on the pushing seat, the bottom end of the push rod inclines towards one side far away from the core rod, and the push rod is inserted into the limiting seat.

Through adopting above-mentioned technical scheme, during the drawing of patterns, along with the vertical rebound of cope match-plate pattern, the cope match-plate pattern can drive the vertical rebound of propelling movement seat and push rod, because the push rod is inserted and is established in spacing seat, and the push rod bottom is to the lopsidedness of keeping away from the plug, and the push rod can promote spacing seat and slide along the direction of keeping away from the plug on the lower bolster to drive the gag lever post and remove to the direction of keeping away from the plug, make the plug on the plug follow spacing downthehole shifting out on the gag lever post, thereby be convenient for carry out the drawing of patterns to the plug.

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

by arranging the driving assembly, the rotating speed of the core rod is more uniform and convenient to control, the rotating speeds of the core rod are consistent in the demolding process of different spindle nuts, and the condition that the quality of the spindle nuts of the same type is uneven is avoided;

by arranging the plurality of core rods and enabling the driving gears corresponding to different core rods to be meshed with the driving rack, the injection molding efficiency of the main shaft gear is improved, and the rotating speeds of the plurality of core rods are kept consistent;

through making plug and connecting rod be for dismantling to be connected, be convenient for change the plug for injection mold can be applicable to the main shaft nut of the different models of moulding plastics.

Drawings

FIG. 1 is a schematic view of a spindle nut;

FIG. 2 is a schematic structural diagram of the present application;

FIG. 3 is an exploded view of the lower mold core;

FIG. 4 is an exploded view of the upper mold core;

FIG. 5 is a schematic diagram intended to show the structure of the driving assembly;

FIG. 6 is a schematic view of a partial structure intended to show a mandrel;

fig. 7 is an exploded schematic view intended to show the first plunger and the second plunger.

Description of reference numerals: 0. a main shaft nut body; 01. a nut head; 02. an external thread; 03. a central bore; 031. an internal thread; 1. an upper die holder; 11. an injection molding system; 2. mounting a template; 21. a pushing seat; 211. a push rod; 22. a card holder; 3. an upper die core; 4. a lower template; 41. drawing the core rod; 411. core-pulling threads; 42. core pulling sleeve; 421. a card slot; 43. a limiting rod; 431. a limiting hole; 44. a limiting seat; 45. a fixed seat; 451. clamping the strip; 46. a chute; 5. a lower die core; 51. a core rod; 511. internally forming threads; 512. a plug; 513. a first plunger; 5131. a first slot; 5132. a first latch; 52. a connecting rod; 521. connecting sleeves; 522. a second plunger; 5221. a second slot; 5222. a second bolt; 6. a lower die holder; 7. a drive assembly; 71. a drive gear; 72. a drive rack; 73. the cylinder is driven.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses main shaft nut's injection mold for main shaft nut moulds plastics, refer to fig. 1, and main shaft nut includes main shaft nut body 0, and the integrative cover of one end of main shaft nut body 0 is equipped with nut head 01, is provided with external screw thread 02 on the lateral surface of the other end, and the 0 axle center department of main shaft nut body has seted up the centre bore 03 that link up, is provided with internal thread 031 in the centre bore 03.

Referring to fig. 2, an injection mold for a spindle nut, including an upper mold base 1, an upper mold plate 2, a lower mold plate 4 and a lower mold base 6, which are sequentially arranged from top to bottom, referring to fig. 3 and 4, two upper mold cores 3 are fixedly embedded at the bottom of the upper mold plate 2, two lower mold cores 5 are fixedly embedded at the top of the lower mold plate 4, the upper mold cores 3 are covered above the lower mold cores 5 and are in one-to-one correspondence with the lower mold cores 5, two injection molding cavities are formed by splicing the upper mold cores 3 and the lower mold cores 5, the two injection molding cavities are distributed along the directions in which the two upper mold cores 3 are close to or far away from each other, the shapes of the injection molding cavities are matched with a spindle nut body 0 (referring to fig. 1), referring to fig. 2 and 4, an injection molding system 11 is fixedly arranged on the upper mold base 1, and the injection molding system 11 penetrates through the upper mold base 1, the upper mold plate 2 and the upper mold cores 3 and is communicated with each injection molding cavity. During injection molding, high-temperature molten plastic is simultaneously injected into the four injection molding cavities through the injection molding system 11, the high-temperature molten plastic is filled in the injection molding cavities, and the four main shaft nuts are formed after the high-temperature molten plastic is cooled, so that the injection molding process of the main shaft nuts is realized.

Referring to fig. 5 and 6, a core rod 51 is arranged in the injection molding cavity, the shape of the core rod 51 is matched with that of the central hole 03, an inner molding thread 511 is arranged on the core rod 51, the inner molding thread 511 is matched with an inner thread 031 in the central hole 03, the core rod 51 is horizontally arranged, and the axial direction of the core rod 51 is the same as the direction in which the adjacent injection molding cavity is close to or away from each other. One end of the core rod 51 is fixedly connected with a connecting rod 52, the connecting rod 52 and the core rod 51 are coaxially arranged, a connecting sleeve 521 is sleeved on the connecting rod 52, the connecting sleeve 521 is rotatably connected with the connecting rod 52, one end, close to the core rod 51, of the connecting sleeve 521 is flush with the end face of the connecting rod 52 and is matched with one end, far away from the nut head 01, of the main body of the spindle nut, one end, close to the core rod 51, of the connecting sleeve 521 is embedded in the bottom face of the upper mold core 3 and the top face of the lower mold core 5 and is fixedly connected with the lower mold core 5, and the other end of the connecting sleeve 521 is fixedly connected with the lower template 4. The end, far away from the connecting rod 52, of the core rod 51 is coaxially provided with a limiting rod 43, one end, close to the core rod 51, of the limiting rod 43 is provided with a limiting hole 431, the core rod 51 is coaxially fixed with a plug 512, the cross-sectional size of the plug 512 is gradually reduced along the direction far away from the core rod 51, the plug 512 is inserted into the limiting hole 431, one end, close to the core rod 51, of the limiting rod 43 is matched with one end, close to the nut head 01, of the main shaft nut body, and one end, close to the core rod 51, of a connecting sleeve 521 is embedded into the bottom surface of the upper mold core 3 and the top surface of the lower mold core 5 and is in sliding connection with the lower mold core 5 along the axial direction of the connecting sleeve.

During injection, the core rod 51 can form the central hole 03 on the main body of the spindle nut, and the internal forming thread 511 on the core rod 51 forms an internal thread 031 in the central hole 03; after the main spindle nut is injection molded, the core rod 51 is rotated to make the core rod 51 spirally rotate along the spiral line direction of the internal thread 031, so that the core rod 51 is taken out from the molded main spindle nut, and the taking-out process of the core rod 51 is realized.

Referring to fig. 4 and 5, one end of the limiting rod 43, which is far away from the core rod 51, is fixedly connected with a limiting seat 44, the limiting seat 44 is embedded on the top surface of the lower template 4 and is in sliding connection with the lower template 4, and the sliding direction of the limiting seat 44 is the same as that of the limiting rod 43. Spacing seat 44 top is provided with the propelling movement seat 21, propelling movement seat 21 is fixed to be inlayed and establishes on the bottom surface of cope match-plate pattern 2, fixedly connected with catch bar 211 on the propelling movement seat 21, the bottom of catch bar 211 is to keeping away from the lopsidedness of plug 51, the axis of catch bar 211 is located vertical plane, and the vertical plane at the axis place of catch bar 211 is parallel with the axis of plug 51, the bottom of catch bar 211 is inserted and is established in spacing seat 44, and along the axis direction sliding connection of catch bar 211 with spacing seat 44.

During the drawing of patterns, with the equal vertical rebound of upper die base 1 and cope match-plate pattern 2, cope match-plate pattern 2 can drive the vertical rebound of promotion seat 21 and catch bar 211, catch bar 211 can promote spacing seat 44 and slide to the one side of keeping away from plug 51 on lower die plate 4 this moment to drive gag lever post 43 and slide to the one side of keeping away from plug 51, make plug 512 on the plug 51 take out in the spacing hole 431 on gag lever post 43, thereby make spindle nut's drawing of patterns process more convenient.

Referring to fig. 5 and 6, a fixed seat 45 is fixedly arranged on the top surface of the lower template 4, a core rod 41 is coaxially fixed at one end of the connecting rod 52 far away from the core rod 51, a core-pulling thread 411 which is the same as the inner molding thread 511 is arranged on the core rod 41, and one end of the core rod 41 far away from the connecting rod 52 is inserted into the fixed seat 45. The core pulling rod 41 is sleeved with a core pulling sleeve 42, the inner side surface of the core pulling sleeve 42 is matched with the core pulling thread 411 and is in threaded connection with the core pulling rod 41, the core pulling sleeve 42 is embedded in one side, close to the core rod 51, of the fixed seat 45, an annular clamping groove 421 is formed in the side surface of the core pulling sleeve 42 along the circumferential direction of the core pulling sleeve, a vertical clamping strip 451 is inserted into the top surface of the fixed seat 45, and the clamping strips 451 are respectively clamped in the clamping grooves 421 on each core pulling sleeve 42.

During demolding, the core pulling rod 41 is rotated to enable the core pulling rod 41 to rotate spirally on the core pulling sleeve 42 along the spiral line of the core pulling thread 411, at the moment, the core pulling rod 41 drives the connecting rod 52 and the core rod 51 to rotate spirally along the spiral line of the inner forming thread 511, namely, the core rod 51 rotates spirally in the formed spindle nut along the spiral line of the inner forming thread 511, and the core rod 51 is taken out of the spindle nut, so that the demolding process of the core rod 51 is avoided by means of the internal thread 031 in the just-formed spindle nut center hole 03, the abrasion of the core rod 51 to the internal thread 031 of the spindle nut in the demolding process is effectively reduced, and the forming quality of the spindle nut is improved.

Referring to fig. 7, a first insertion rod 513 is fixedly disposed at one end of the mandrel 51 close to the connecting rod 52, the cross section of the first insertion rod 513 is irregular, the first insertion rod 513 is disposed coaxially with the mandrel 51, the first insertion rod 513 is inserted into one end of the connecting rod 52 close to the mandrel 51, a first insertion groove 5131 is formed in the first insertion rod 513, a first plug 5132 is inserted into the first insertion groove 5131 through the connecting rod 52, and the first plug 5132 is inserted into the first insertion groove 5131.

Referring to fig. 7, a second insertion rod 522 is fixedly disposed at one end of the connecting rod 52 close to the rod drawing rod 41, the cross section of the second insertion rod 522 is oval, the second insertion rod 522 is coaxially disposed with the connecting rod 52, the second insertion rod 522 is inserted into one end of the rod drawing rod 41 close to the connecting rod 52, a second insertion slot 5221 is formed in the second insertion rod 522, a second plug pin 5222 is inserted into the second insertion slot 5221 through the rod drawing rod 41.

When the spindle nut with different internal threads 031 needs to be injection molded, the clamping strip 451 is pulled out from the jack, at the moment, the clamping strip 451 is taken out from the clamping groove 421, and then the core pulling sleeve 42 is taken down from the fixed seat 45; then the first plug 5132 is taken out of the first slot 5131, and the first plug 513 is pulled out of the connecting rod 52, so that the core rod 51 is taken down from the connecting rod 52; meanwhile, the second plug pin 5222 is taken out of the second slot 5221, the second plug rod 522 is pulled out of the core pulling rod 41, the core pulling rod 41 is taken down from the connecting rod 52, and then the core rod 51, the core pulling rod 41 and the core pulling sleeve 42 are replaced at the same time, so that the injection mold can be suitable for injection molding of spindle nuts with different internal threads 031, and the mold replacement process of the injection mold is more convenient.

Referring to fig. 3 and 5, the connecting rod 52 is connected with a driving assembly 7, the driving assembly 7 includes four driving gears 71, four driving racks 72 and a driving part, the four driving gears 71 are respectively coaxially sleeved on the connecting rods 52 corresponding to the four core rods 51, and the driving gears 71 are fixedly connected with the connecting rods 52; the driving rack 72 is horizontally arranged on the lower template 4, the length direction of the driving rack 72 is vertical to the axial direction of the connecting rod 52, the lower template 4 is provided with a chute 46, the length direction of the chute 46 is the same as that of the driving rack 72, the driving rack 72 is positioned in the chute 46 and is in sliding connection with the lower template 4, the four driving gears 71 all drive the racks 72 to be meshed with each other, the top surface of the driving rack 72 is provided with a clamping seat 22, and the clamping seat 22 is meshed with the driving rack 72 and is fixedly connected with the upper template 2; the driving part is a driving air cylinder 73, the length direction of the driving air cylinder 73 is the same as that of the driving rack 72, the driving air cylinder 73 is fixedly connected with the lower template 4, the piston rod of the driving air cylinder 73 faces to one side close to the driving rack 72, and the piston rod of the driving air cylinder 73 is fixedly connected with one end of the driving rack 72 in the length direction.

During demoulding, the upper die plate 2 is vertically moved upwards, the clamping seat 22 is driven to vertically move upwards, the clamping seat 22 is separated from the driving rack 72, the piston rod of the driving cylinder 73 is telescopic at the moment, the driving cylinder 73 drives the driving rack 72 to slide in the sliding groove 46, the driving rack 72 drives the four driving gears 71 to simultaneously rotate, the driving gears 71 can drive the connecting rod 52 and the core rod 41 and the core rod 51 to rotate, the driving effect on the rotating process of the core rod 41 is realized, the rotating speed of the core rod 51 is more uniform and convenient to control, the rotating speeds of the core rods 51 in the demoulding processes of different spindle nuts are consistent, the condition that the quality of the spindle nuts of the same model is uneven is avoided, and the forming quality of the spindle nuts is improved.

The implementation principle of the injection mold of the spindle nut in the embodiment of the application is as follows: after the spindle nut is cooled and formed, the upper die holder 1 and the upper die plate 2 both vertically move upwards, the upper die plate 2 drives the die holder 22 to vertically move upwards, so that the die holder 22 is separated from the driving rack 72, at the moment, the piston rod of the driving cylinder 73 stretches and retracts, and drives the driving rack 72 to slide in the chute 46, the driving rack 72 drives the four driving gears 71 to simultaneously rotate, so that the four connecting rods 52, the core pulling rod 41 and the core rod 51 are driven to simultaneously rotate along the spiral line of the internal forming thread 511 in a spiral manner, and the core rod 51 is taken out of the spindle nut, so that the rotating speed of the core rod 51 is more uniform and convenient to control, and the rotating speeds of the core rods 51 in the demoulding process of different spindle nuts are consistent, thereby avoiding the condition that the quality of the spindle nuts of the same model is uneven, and improving the forming quality of the spindle nut.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above 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 (9)

1. The utility model provides a main shaft nut's injection mold, includes cope match-plate pattern (2) and lower bolster (4) that are located cope match-plate pattern (2) below, fixed the inlaying in cope match-plate pattern (2) bottom is equipped with mould benevolence (3), and lower bolster (4) top is fixed to be inlayed and is equipped with lower mould benevolence (5), and the concatenation forms the chamber of moulding plastics between lower mould benevolence (5) and upper mould benevolence (3), and the intracavity of moulding plastics is provided with plug (51), is provided with internal forming screw thread (511) on plug (51), its characterized in that: one end of the mandrel (51) is coaxially fixed with a connecting rod (52), the connecting rod (52) is connected with a driving assembly (7), the driving assembly (7) comprises a driving gear (71), a driving rack (72) and a driving piece, the driving gear (71) is coaxially and fixedly sleeved on the connecting rod (52), the driving gear (71) is meshed with the driving rack (72), the driving piece is fixedly arranged on the lower template (4), and the driving piece is connected with the driving rack (72) and used for enabling the driving rack (72) to move along the length direction of the driving rack (72).

2. The injection mold of a spindle nut as set forth in claim 1, wherein: the injection molding cavity is provided with a plurality of cavities.

3. The injection mold of a spindle nut as set forth in claim 2, wherein: the injection molding cavities are distributed along the length direction of the driving rack (72), the driving gears (71) are arranged in a plurality and correspond to the connecting rods (52) on the core rods (51) in each injection molding cavity one by one, and the driving gears (71) are meshed with the driving rack (72).

4. The injection mold of a spindle nut as set forth in claim 1, wherein: the core rod (51) is detachably connected with the connecting rod (52).

5. An injection mold of a spindle nut according to claim 4, characterized in that: one end, close to the connecting rod (52), of the core rod (51) is fixedly provided with a first inserting rod (513), the first inserting rod (513) is inserted into the connecting rod (52), a first inserting groove (5131) is formed in the first inserting rod (513), a first inserting pin (5132) penetrates through the connecting rod (52), and the first inserting pin (5132) is inserted into the first inserting groove (5131).

6. The injection mold of a spindle nut as set forth in claim 1, wherein: the bottom of the upper template (2) is fixedly provided with a clamping seat (22), and the clamping seat (22) is meshed with the driving rack (72).

7. The injection mold of a spindle nut as set forth in claim 1, wherein: the lower template (4) is connected with the driving rack (72) in a sliding mode along the length direction of the driving rack (72).

8. The injection mold of a spindle nut as set forth in claim 1, wherein: a limiting rod (43) is arranged at one end, away from the connecting rod (52), of the core rod (51), a limiting hole (431) with a circular cross section is formed in the limiting rod (43), a plug (512) is coaxially fixed on the core rod (51), and the plug (512) is inserted into the limiting hole (431).

9. An injection mold of a spindle nut according to claim 8, characterized in that: spacing seat (44) of fixedly connected with on gag lever post (43), spacing seat (44) and lower bolster (4) are along the axis direction sliding connection of plug (51), are provided with on spacing seat (44) and push away seat (21), push away seat (21) and cope match-plate pattern (2) fixed connection, push away to be provided with the push rod on seat (21) fixedly, the push rod bottom is to keeping away from the one side slope of plug (51), and insert and establish in spacing seat (44).

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