Multi-row slide block structure of injection mold

Abstract

The present application relates to a kind of multi-row slider structures of injection mold, including respectively front and rear positioning slider and positioning oil cylinder;The bottom of positioning slider is further provided with the inclined distribution multi-section core-pulling module, and the multi-section core-pulling module is set low in front and high in back, the multi-section core-pulling module includes traction column, core column concentrically fixed in the front end of traction column, forming sleeve concentrically and movably sleeved outside the core column, and clamping sleeve concentrically and movably sleeved outside the forming sleeve, the rear end of traction column is movably connected at the bottom of positioning slider front side corner to have the function of front and back inclined linear movement;The present application can simultaneously form a plurality of inverted buckle or side concave structures in the cavity with inconsistent demolding direction, so as to simplify the operation process, improve the production efficiency and reduce the production cost;Meanwhile, the structure of mold is also simplified to reduce the machining, installation and debugging difficulty of mold and achieve the effect of time and labor saving.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and in particular to a multi-row slider structure for injection molds. Background Technology

[0002] Injection molds are key tools used in industrial production to mold plastic products. Through injection molding technology, plastic raw materials are transformed into products of specific shapes, and their applications cover multiple fields such as electronics, automobiles, and home appliances. Slider is a mold component that can slide perpendicular to the mold opening and closing direction or at a certain angle to the mold opening and closing direction during the mold opening action of the injection mold. Its core function is to solve the problem of undercut in the product structure that is inconsistent with the mold opening and closing direction, and to ensure that the product can be demolded smoothly.

[0003] Most existing sliders only have single-position movement capabilities, thus they can only be used to handle a single undercut or concave structure on a single side of an injection molded part. However, in actual production, some complex injection molded parts often contain multiple undercuts or concave structures on their sides, and the demolding directions of some undercuts or concave structures may even be inconsistent. Therefore, single-position sliders cannot achieve the above process and have a limited scope of application. If multiple undercuts or concave structures are to be formed sequentially, multiple forming methods must be used, but the operation process is cumbersome, resulting in low production efficiency. In addition, multiple sets of molds are required, which increases production costs. If multiple undercuts or concave structures are to be formed at once, multiple interoperable modules must be installed on the mold from different directions, but this makes the mold structure more complex, and the processing, installation, and debugging of the mold are more difficult, which is both time-consuming and labor-intensive, and urgently needs to be resolved. Summary of the Invention

[0004] In view of the current status of the prior art, the technical problem to be solved by the present invention is to provide a multi-slide block structure for injection molds that has multiple sliding motion functions to form multiple undercut or side recessed structures with inconsistent demolding directions in one go, thereby simplifying the operation process to improve production efficiency and reduce production costs, and simplifying the mold structure to reduce the difficulty of mold processing, installation and debugging, thus achieving the effect of saving time and effort.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a multi-slider structure for injection molds, comprising positioning sliders and positioning cylinders respectively arranged front and rear, wherein the telescopic end of the positioning cylinder is arranged laterally forward and fixed on the positioning slider, characterized in that:

[0006] The bottom of the positioning slider is also provided with a multi-segment core-pulling module with an inclined distribution. The multi-segment core-pulling module is set with the front lower and the back higher. The multi-segment core-pulling module includes a traction column, a core column concentrically fixed to the front end of the traction column, a forming sleeve concentrically and movably sleeved on the outside of the core column, and a locking sleeve concentrically and movably sleeved on the outside of the forming sleeve. The rear end of the traction column is movably connected to the front corner of the bottom of the positioning slider to have the function of forward and backward tilting linear movement.

[0007] The multi-segment core-pulling module also includes two inclined and movably interlocked traction bars located on the left and right sides of the core column, each having the function of forward and backward inclined linear movement, and diagonally opposite to each other. Both traction bars are set with the front lower than the back and are parallel to the central axis of the traction column. The front ends of both traction bars are fixed to the rear end of the forming sleeve.

[0008] The multi-segment core-pulling module also includes two inclined and movably embedded core rods in the inner walls of the upper and lower sides of the forming sleeve, each having the function of forward and backward inclined linear movement, and arranged diagonally to each other. Each core rod is arranged with the front lower and the rear higher and is parallel to the central axis of the forming sleeve. The outer wall of each core rod is slidably attached to the inner wall of the forming sleeve, and the rear end of each core rod is fixed to the front end of the traction column.

[0009] The outer circumferential surface of the positioning sleeve is provided with a spiral groove on both the upper and lower sides. The two spiral grooves are arranged in a centrally symmetrical manner. Correspondingly, a protruding post is fixed on the outer wall of each of the two core rods. The two protruding posts are perpendicular to the central axis of the positioning sleeve and are arranged diagonally to each other. The ends of the two protruding posts are respectively movably embedded in the two spiral grooves.

[0010] The multi-segment core-pulling module also includes two pins that are respectively tilted and fixed at the front ends of the two core rods, and each pin is parallel to the central axis of the forming sleeve.

[0011] Preferably, an inclined traction groove is provided on the outer wall of the left and right sides of the upper end of the traction column. The two traction grooves are arranged with the front higher than the back and are diagonally distributed. Correspondingly, an avoidance slope is formed at the bottom front corner of the positioning slider. Two drive blocks are also embedded and fixed on the avoidance slope and are arranged laterally and symmetrically on the left and right sides of the upper end of the traction column. The bottom outer wall of the two drive blocks cooperates with the lower inner wall of the two traction grooves respectively.

[0012] Preferably, an alignment unit is provided between the core column and the forming sleeve. The alignment unit includes a traction beam that is laterally and movably inserted into the core column to enable it to move back and forth along the axial direction of the core column, and two alignment rods that are inclined and movably connected to the lower side of the traction beam to enable them to translate left and right and are symmetrically arranged. The cross-sectional shape of the traction beam is cross-shaped. Both ends of the traction beam are fixed to the forming sleeve. The ends of the two alignment rods movably pass through the front end of the core column and extend into the lower opening of the forming sleeve.

[0013] Preferably, a slot is formed between the outer walls of the left and right sides of the core column, and a symmetrically distributed limiting groove is formed between the inner walls of the left and right sides of the slot. The traction beam is laterally and movably inserted into the slot so that the protruding parts on the left and right sides of the traction beam are respectively movably positioned in the two limiting grooves. A cross-shaped cavity is formed on the outer walls of the left and right sides of the molded sleeve, and the left and right ends of the traction beam are respectively inserted and fixed into the two cross-shaped cavities.

[0014] Preferably, the front end of the core column is formed with concentrically arranged stepped columns. The left and right edges of the end of the stepped column are each provided with an inclined guide channel that is connected to the outer wall of the stepped column. The two guide channels are arranged diagonally to each other. The two alignment rods are respectively movably embedded in the two guide channels. The opposite outer walls of the two alignment rods are respectively slidably attached to the bottom surface of the two guide channels.

[0015] Preferably, the front end of the molded sleeve has a concentrically arranged frustum portion, and the end of the frustum portion has a positioning hole that is concentrically distributed and interconnected with the inside of the molded sleeve and cooperates with the step column. The inner diameter of the positioning hole is larger than the outer diameter of the step column.

[0016] Preferably, each of the two alignment rods has a symmetrically arranged docking block formed on the outer wall of its opposite side at the lower end, and the outer wall of each docking block on its opposite side cooperates with the inner wall of the positioning hole; each of the two docking blocks has a symmetrically distributed arc-shaped notch at the outer corner of its end, and correspondingly, two symmetrically distributed perforation grooves are opened on the left and right sides of the outer opening of the positioning hole.

[0017] Preferably, the rear end of the forming sleeve is formed with a concentrically arranged retaining ring, the outer diameter of which is larger than the outer diameter of the forming sleeve and equal to the outer diameter of the traction column; the outer end face of the retaining ring is provided with two arc-shaped through holes distributed diagonally to each other, and the two arc-shaped through holes form a guide groove on the left and right outer walls of the forming sleeve, the two core rods are respectively movably embedded in the two guide grooves, and the rear ends of the two core rods are respectively inserted into the two arc-shaped through holes.

[0018] Preferably, each of the two segmented traction bars also has a symmetrically arranged flat cut surface at the front corner of its rear end.

[0019] Preferably, two core blocks are formed on the outer wall of the front end of the positioning sleeve, which are arranged diagonally opposite each other.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] The multi-segment core-pulling module of this invention has multiple movement functions. The traction column and the forming sleeve can form a two-stage progressive movement in sequence. The cooperation between the core column and the forming sleeve can also make the two alignment rods in the alignment unit move closer or further apart due to the movement of the traction column. At the same time, the two core rods and two protrusions can drive the positioning sleeve to rotate. In this way, multiple undercut or side-concave structures with different demolding directions located in the mold cavity can be formed at one time. It does not require multiple molding methods or the installation of multiple cooperating modules, thus simplifying the operation process, improving production efficiency and reducing production costs. At the same time, it also simplifies the mold structure, reducing the difficulty of mold processing, installation and debugging, thereby achieving the effect of saving time and effort. Attached Figure Description

[0022] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings:

[0023] Figure 1 This is an exploded top view of the right front side of the present invention;

[0024] Figure 2 This is a top view of the left front side of the positioning slider and driving block of the present invention;

[0025] Figure 3 This is a top view of the right rear side of the molded sleeve of the present invention;

[0026] Figure 4 This is a bottom view of the left front side of the molded sleeve of the present invention;

[0027] Figure 5 This is an exploded top view of the core column, segmented traction bar, and alignment unit of the present invention. Detailed Implementation

[0028] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0030] like Figures 1-5 As shown, a multi-slider structure for an injection mold includes a positioning slider 1 and a positioning cylinder 2 respectively arranged in front and behind. The telescopic end of the positioning cylinder 2 is arranged laterally forward and fixed on the positioning slider 1.

[0031] The bottom of the positioning slider 1 is also provided with a multi-segment core-pulling module 3 with an inclined distribution. The multi-segment core-pulling module 3 is set with the front lower and the back higher. The multi-segment core-pulling module 3 includes a traction column 31, a core column 32 concentrically fixed to the front end of the traction column 31, a forming sleeve 33 concentrically and movably sleeved outside the core column 32, and a locking sleeve 34 concentrically and movably sleeved outside the forming sleeve 33. The rear end of the traction column 31 is movably connected to the front corner of the bottom of the positioning slider 1 so as to have the function of forward and backward tilting linear movement.

[0032] The multi-segment core-pulling module 3 also includes two inclined and movably interlocked segments of traction bars 36 located on the left and right sides of the core column 32, which are diagonally opposite each other and are arranged on the left and right sides of the core column 32. Both segments of traction bars 36 are arranged with the front lower than the back and are parallel to the central axis of the traction column 31. The front ends of both segments of traction bars 36 are fixed to the rear end of the forming sleeve 33.

[0033] The multi-segment core-pulling module 3 also includes two inclined core rods 35 that are movably embedded in the inner walls of the upper and lower sides of the molding sleeve 33, each having the function of forward and backward inclined linear movement, and are diagonally arranged to each other. Each core rod 35 is arranged with the front lower and the back higher, and is parallel to the central axis of the molding sleeve 33. The outer wall of each core rod 35 is slidably attached to the inner wall of the molding sleeve 33, and the rear end of each core rod 35 is fixed to the front end of the traction column 31.

[0034] A spiral groove 341 is provided on both the upper and lower sides of the outer circumferential surface of the locking sleeve 34. The two spiral grooves 341 are arranged in a centrally symmetrical manner. Correspondingly, a protruding post 37 is fixed on the outer wall of each of the two core rods 35. The two protruding posts 37 are perpendicular to the central axis of the locking sleeve 34 and are arranged diagonally to each other. The ends of the two protruding posts 37 are respectively movably embedded in the two spiral grooves 341.

[0035] An inclined traction groove 3101 is provided on the outer wall of the upper left and right sides of the traction column 31. The two traction grooves 3101 are arranged with the front higher than the back and are diagonally distributed to each other. Correspondingly, an avoidance slope 11 is formed at the bottom front corner of the positioning slider 1. Two drive blocks 38 are also embedded and fixed on the avoidance slope 11, which are laterally distributed and symmetrically arranged on the upper left and right sides of the traction column 31. The bottom outer wall of the two drive blocks 38 respectively cooperates with the lower inner wall of the two traction grooves 3101.

[0036] Two core blocks 342 are formed outward on the outer wall of the front end of the positioning sleeve 34. They are arranged diagonally opposite each other.

[0037] An alignment unit 39 is also provided between the core column 32 and the forming sleeve 33. The alignment unit 39 includes a traction beam 391 that is laterally and movably connected in the core column 32 to have the function of moving back and forth along the axial direction of the core column 32, and two alignment rods 392 that are inclined and movably connected to the lower side of the traction beam 391 to have the function of lateral translation and are symmetrically arranged. The cross-sectional shape of the traction beam 391 is cross-shaped. Both ends of the traction beam 391 are fixed on the forming sleeve 33. The ends of the two alignment rods 392 movably pass through the front end of the core column 32 and extend into the lower opening of the forming sleeve 33.

[0038] A slot 323 is provided between the outer walls of the left and right sides of the core column 32. A limiting groove 324 is provided between the inner walls of the left and right sides of the slot 323. The traction beam 391 is transversely and movably inserted into the slot 323 so that the protruding parts on the left and right sides of the traction beam 391 are respectively movably disposed in the two limiting grooves 324.

[0039] A cross-shaped cavity 336 is opened on the outer walls of both the left and right sides of the forming sleeve 33, and the left and right ends of the traction beam 391 are respectively inserted and fixed in the two cross-shaped cavities 336.

[0040] The front end of the core column 32 forms a concentrically arranged stepped column 321. The left and right edges of the end of the stepped column 321 and the lower inner wall of the slot 323 are each provided with an inclined guide channel 322 that is connected to the outer wall of the stepped column 321. The two guide channels 322 are diagonally arranged. Two alignment rods 392 are respectively movably embedded in the two guide channels 322. The opposite outer walls of the two alignment rods 392 slide against the bottom surface of the two guide channels 322.

[0041] The front end of the molded sleeve 33 has a concentrically arranged frustum 331. The end of the frustum 331 has a positioning hole 332 that is concentrically distributed and interconnected with the interior of the molded sleeve 33 and cooperates with the stepped column 321. The inner diameter of the positioning hole 332 is larger than the outer diameter of the stepped column 321.

[0042] On the opposite outer walls of the lower ends of the two alignment rods 392, there is a symmetrically arranged docking block 3921. The opposite outer wall of each docking block 3921 cooperates with the inner wall of the positioning hole 332.

[0043] At the outer corner of the ends of the two mating blocks 3921, there is a symmetrically distributed arc-shaped notch 3922. Correspondingly, at the outer end opening of the positioning hole 332, there are two symmetrically distributed perforation grooves 335 on the left and right sides.

[0044] The rear end of the molded sleeve 33 has a concentrically arranged retaining ring 334. The outer diameter of the retaining ring 334 is larger than the outer diameter of the molded sleeve 33 and equal to the outer diameter of the traction column 31.

[0045] The outer end face of the retaining ring 334 has two arc-shaped through holes 337 that are diagonally distributed. The two arc-shaped through holes 337 form a guide groove 333 on the outer walls of the left and right sides of the forming sleeve 33. The two core rods 35 are respectively movably embedded in the two guide grooves 333, and the rear ends of the two core rods 35 are respectively inserted into the two arc-shaped through holes 337.

[0046] At the rear front corner of each of the two segmented traction bars 36, there is a symmetrically arranged flat cut surface 361.

[0047] The multi-segment core-pulling module 3 also includes two pins 310 that are respectively tilted and fixed at the front ends of the two core rods 35, and each pin 310 is parallel to the central axis of the forming sleeve 33.

[0048] A guide block 4 is also embedded on the top left or right edge of the positioning slider 1. Correspondingly, two micro switches 5 are also provided on the left or right side of the positioning slider 1, which are distributed front and back respectively. The moving contacts of the two micro switches 5 are both horizontal and set towards the positioning slider 1, and both cooperate with the guide block 4.

[0049] Working principle:

[0050] The positioning slider 1 is movably installed in the fixed module of the injection mold, and the positioning cylinder 2 and two micro switches 5 are fixed on the fixed module, so that the multi-segment core-pulling module 3 extends into the mold cavity located on the fixed module.

[0051] When the end face of the moving module of the injection mold is joined with the end face of the fixed module, the telescopic end of the drive positioning cylinder 2 extends outward to drive the positioning slider 1 to move forward, thereby driving the traction column 31 in the multi-segment core-pulling module 3 to tilt forward and downward and move in a straight line. The rear end of the traction column 31 moves backward and downward relative to the positioning slider 1. Since the core column 32 is concentrically fixed at the front end of the traction column 31, the core column 32 will also move synchronously with the traction column 31.

[0052] Since the traction beam 391 in the alignment unit 39 is located at the front of the slot 323, the core column 32 will force the molding sleeve 33 to move synchronously through the traction beam 391 when it moves. Since the upper end of the locking sleeve 34 is pressed against the front end face of the retaining ring 334, the movement of the molding sleeve 33 will drive the locking sleeve 34 to move synchronously until the front end of the molding sleeve 33 and the cone part 331 reach the designated position in the mold cavity and can no longer move forward and downward.

[0053] Next, the telescopic end of the positioning cylinder 2 continues to extend outward to drive the rear end of the traction column 31 to continue moving backward and downward in the same way. When the two traction grooves 3101 on the traction column 31 are respectively in front of the two drive blocks 38, if the rear end of the traction column 31 continues to move backward and downward, the two drive blocks 38 will gradually enter the two traction grooves 3101. When the bottom outer wall of the two drive blocks 38 contacts the lower inner wall of the two traction grooves 3101, it will force the front end of the traction column 31 to continue moving forward and downward. Then, the core column 32 drives the traction beam 391 to move synchronously, so that the traction beam 391 slides backward and upward along the slot 323.

[0054] Since the two alignment rods 392 are respectively movably embedded in the two guide channels 322, and the opposite outer walls of the two alignment rods 392 slide against the bottom surface of the two guide channels 322, when the traction beam 391 drives the two alignment rods 392 to move backward and upward relative to the core column 32, the roots of the two alignment rods 392 will translate in opposite directions along the traction beam 391, thereby causing the ends of the two alignment rods 392 to gradually separate from each other until the arc-shaped notches 3922 on the two alignment rods 392 are matched with the end edges of the stepped column 321.

[0055] It is worth mentioning that when the traction column 31 moves forward and downward relative to the forming sleeve 33, the traction column 31 will also drive the two core rods 35 to move synchronously. Since the ends of the protrusions 37 on the two core rods 35 are respectively movably embedded in the two spiral grooves 341, when the two core rods 35 move, they will also force the locking sleeve 34 to rotate a certain angle by means of the mutual cooperation between the two protrusions 37 and the two spiral grooves 341, thereby causing the two core blocks 342 to rotate circumferentially and be inserted laterally into the forming groove located in the mold cavity. At this time, the ends of the two pins 310 are inserted into the corresponding pin holes located in the mold cavity.

[0056] The guide block 4 and the two microswitches 5 are used to limit the extreme positions of the positioning slider 1's forward and backward translation.

[0057] Next, the molten material is fed into the moving module and the mold cavity on the moving module. After cooling, the injection molded part is obtained. Finally, the end face of the driving module is separated from the end face of the stationary module, and the molded part is ejected outward by the ejection mechanism (existing technology).

[0058] However, before the moving module end face separates from the fixed module end face, the multi-segment core-pulling module 3 must be driven away from the injection molded part. During operation, as long as the telescopic end of the driving positioning cylinder 2 retracts inward, the positioning slider 1 will be driven to move backward in the same way, thereby driving the traction column 31 and core column 32 in the multi-segment core-pulling module 3 to tilt backward and upward and move in a straight line. Meanwhile, the rear end of the traction column 31 moves forward and upward relative to the positioning slider 1. Since the traction beam 391 in the alignment unit 39 is located on the last side of the slot 323 at this time, the molding sleeve 33 and the positioning sleeve 34 remain stationary.

[0059] When the two core rods 35 move synchronously with the traction column 31, they will similarly force the locking sleeve 34 to reverse at a certain angle through the cooperation of the two protrusions 37 and the two spiral grooves 341, thereby causing the two core blocks 342 to reverse circumferentially so that the two core blocks 342 leave the two molding grooves in the mold cavity from their original path; when the traction beam 391 slides along the slot 323 to the foremost side, the core rods 32 thereafter cannot move relative to the molding sleeve 33, but instead begin to drive the molding sleeve 33 to move linearly backward and upward through the traction beam 391, while driving the locking sleeve 34 to move synchronously, so that the front end of the molding sleeve 33 and the cone part 331 leave the injection molded part.

[0060] The multi-segment core-pulling module 3 of the present invention has multiple movement functions. The traction column 31 and the forming sleeve 33 can form a two-stage progressive movement in sequence. The mutual cooperation between the core column 32 and the forming sleeve 33 can also make the two alignment rods 392 in the alignment unit 39 move closer or further apart due to the movement of the traction column 31. At the same time, the two core rods 35 and the two protrusions 37 can drive the locking sleeve 34 to rotate. In this way, multiple undercut or side-concave structures with different demolding directions located in the mold cavity can be formed at one time. It does not require multiple molding methods or the installation of multiple cooperating modules, thus simplifying the operation process, improving production efficiency and reducing production costs. At the same time, it also simplifies the mold structure, reduces the difficulty of mold processing, installation and debugging, thereby achieving the effect of saving time and effort.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-slider structure for an injection mold, comprising positioning sliders and positioning cylinders respectively arranged front and rear, wherein the telescopic end of the positioning cylinder is arranged laterally forward and fixed on the positioning slider, characterized in that: The bottom of the positioning slider is also provided with a multi-segment core-pulling module with an inclined distribution. The multi-segment core-pulling module is set with the front lower and the back higher. The multi-segment core-pulling module includes a traction column, a core column concentrically fixed to the front end of the traction column, a forming sleeve concentrically and movably sleeved on the outside of the core column, and a locking sleeve concentrically and movably sleeved on the outside of the forming sleeve. The rear end of the traction column is movably connected to the front corner of the bottom of the positioning slider to have the function of forward and backward tilting linear movement. The multi-segment core-pulling module also includes two inclined and movably interlocked traction bars located on the left and right sides of the core column, each having the function of forward and backward inclined linear movement, and diagonally opposite to each other. Both traction bars are set with the front lower than the back and are parallel to the central axis of the traction column. The front ends of both traction bars are fixed to the rear end of the forming sleeve. The multi-segment core-pulling module also includes two inclined and movably embedded core rods in the inner walls of the upper and lower sides of the forming sleeve, each having the function of forward and backward inclined linear movement, and arranged diagonally to each other. Each core rod is arranged with the front lower and the rear higher and is parallel to the central axis of the forming sleeve. The outer wall of each core rod is slidably attached to the inner wall of the forming sleeve, and the rear end of each core rod is fixed to the front end of the traction column. The outer circumferential surface of the positioning sleeve is provided with a spiral groove on both the upper and lower sides. The two spiral grooves are arranged in a centrally symmetrical manner. Correspondingly, a protruding post is fixed on the outer wall of each of the two core rods. The two protruding posts are perpendicular to the central axis of the positioning sleeve and are arranged diagonally to each other. The ends of the two protruding posts are respectively movably embedded in the two spiral grooves. The multi-segment core-pulling module also includes two pins that are respectively tilted and fixed at the front ends of the two core rods, and each pin is parallel to the central axis of the forming sleeve. An alignment unit is also provided between the core column and the forming sleeve. The alignment unit includes a traction beam that is laterally and movably inserted into the core column to enable it to move back and forth along the axis of the core column, and two alignment rods that are inclined and movably connected to the lower side of the traction beam to enable them to translate left and right and are symmetrically arranged. The cross-sectional shape of the traction beam is cross-shaped. Both ends of the traction beam are fixed to the forming sleeve. The ends of the two alignment rods movably pass through the front end of the core column and extend into the lower opening of the forming sleeve.

2. The multi-slide block structure of an injection mold according to claim 1, characterized in that, An inclined traction groove is provided on the outer wall of the left and right sides of the upper end of the traction column. The two traction grooves are arranged with the front higher than the back and are diagonally distributed. Correspondingly, an avoidance slope is formed at the bottom front corner of the positioning slider. Two drive blocks are also embedded and fixed on the avoidance slope and are arranged laterally and symmetrically on the left and right sides of the upper end of the traction column. The bottom outer wall of the two drive blocks cooperates with the lower inner wall of the two traction grooves respectively.

3. The multi-slide block structure of an injection mold according to claim 1, characterized in that, A slot is formed between the outer walls of the left and right sides of the core column. A symmetrically distributed limiting groove is formed between the inner walls of the left and right sides of the slot. The traction beam is transversely and movably inserted into the slot so that the protruding parts on the left and right sides of the traction beam are respectively movably set in the two limiting grooves. A cross-shaped cavity is formed on the outer walls of the left and right sides of the forming sleeve. The left and right ends of the traction beam are respectively inserted and fixed into the two cross-shaped cavities.

4. The multi-slide block structure of an injection mold according to claim 3, characterized in that, The front end of the core column forms a concentric stepped column. The left and right edges of the end of the stepped column are each provided with an inclined guide channel that is connected to the outer wall of the stepped column. The two guide channels are diagonally arranged. The two alignment rods are respectively movably embedded in the two guide channels. The opposite outer walls of the two alignment rods slide against the bottom surface of the two guide channels.

5. The multi-slide block structure of an injection mold according to claim 4, characterized in that, The front end of the molded sleeve has a concentrically arranged frustum portion. The end of the frustum portion has a positioning hole that is concentrically distributed and interconnected with the inside of the molded sleeve and cooperates with the step column. The inner diameter of the positioning hole is larger than the outer diameter of the step column.

6. The multi-slide block structure of an injection mold according to claim 5, characterized in that, On the opposite outer walls of the lower ends of the two alignment rods, there are symmetrically arranged docking blocks. The opposite outer walls of each docking block cooperate with the inner wall of the positioning hole. At the outer corners of the ends of the two docking blocks, there are symmetrically distributed arc-shaped notches. Correspondingly, there are two symmetrically distributed perforation grooves on the left and right edges of the outer opening of the positioning hole.

7. The multi-slide block structure of an injection mold according to claim 1, characterized in that, The rear end of the forming sleeve has a concentrically arranged retaining ring. The outer diameter of the retaining ring is larger than the outer diameter of the forming sleeve and equal to the outer diameter of the traction column. The outer end face of the retaining ring has two arc-shaped through holes that are diagonally distributed. Each of the two arc-shaped through holes forms a guide groove on the outer wall of the left and right sides of the forming sleeve. The two core rods are respectively movably embedded in the two guide grooves, and the rear ends of the two core rods are respectively inserted into the two arc-shaped through holes.

8. The multi-slide block structure of an injection mold according to claim 1, characterized in that, Each of the two segmented traction bars also has a symmetrically arranged flat cut surface at the front corner of its rear end.

9. The multi-slide block structure of an injection mold according to claim 1, characterized in that, Two core blocks are formed on the outer wall of the front end of the positioning sleeve, which are arranged diagonally opposite each other.

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