CN111391249A - Large core-pulling stroke injection mold with slide block and rear mold synchronously acting and method thereof - Google Patents

Abstract

The invention relates to a large core-pulling stroke injection mold with a slide block and a rear mold synchronously acting and a method thereof, wherein the mold comprises a front mold and a rear mold; the front mould comprises a front mould core; the rear die comprises a rear die core; the rear die also comprises a slide block insert and a slide block; the front die also comprises an inclined guide post; the slide block is provided with a guide groove; the rear mould also comprises a positioning component; the rear die also comprises a transmission part and a driving component; the rear mould also comprises a transverse thimble; the sliding block is provided with an ejector plate, a push block and a reset assembly; at least one of the slide block insert and the slide block is provided with a reset assembly; a first movable groove is formed in the side surface of the sliding block; the slide block insert is provided with a second movable groove; the push block is provided with a first inclined plane; the front mould also comprises a limiting block; the limiting block is provided with a second inclined plane; through the combination of the inclined guide pillar and the driving assembly, the large core pulling stroke is realized, and in the mold opening and closing process, the sliding block can synchronously act with the rear mold, the action is reliable, and the production efficiency is high.

Description

Large core-pulling stroke injection mold with slide block and rear mold synchronously acting and method thereof

Technical Field

The invention relates to the technical field of injection molds, in particular to a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously and a method thereof.

Background

In the mould trade, often can drive the slider through oblique guide pillar, realize the slider slip and move going on in step of cover half die sinking, but adopt oblique guide pillar mode, the activity stroke of slider is little, can't satisfy the production demand of big stroke. The hydraulic cylinder can realize larger stroke, but at present, the sliding block is simply drawn first and then the die is opened, or the die is opened first and then the sliding block is drawn, namely, the sliding block movement and the die opening and closing movement are separated, and the requirement of synchronous movement cannot be met. Therefore, there is still a need to modify existing molds to address the aforementioned deficiencies.

Disclosure of Invention

The invention aims to solve the technical problem of providing a large core pulling stroke injection mold with a slide block and a rear mold synchronously acting and a using method of the injection mold aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

on one hand, the large core-pulling stroke injection mold with the slide block and the rear mold acting synchronously comprises a front mold and a rear mold; the front die comprises a front die core; the rear die comprises a rear die core; the rear die also comprises four groups of sliding block inserts respectively corresponding to four outer side surfaces of the product, and four groups of sliding blocks respectively fixed with the four groups of sliding block inserts; the front mold core, the rear mold core and the four groups of slide block inserts are matched to enclose an injection molding chamber matched with a product; the front die also comprises four groups of inclined guide posts which respectively correspond to the four groups of sliding blocks; the lower end of the inclined guide post is the end far away from the front die core; the upper surface of the sliding block is provided with a guide groove matched with the inclined guide post; the rear die further comprises a positioning assembly defining an initial position of the oblique guide post before the oblique guide post enters the slider, and the positioning assembly is used for defining the guide groove in an axial direction of the oblique guide post; the positioning assemblies correspond to the sliding blocks one to one;

the rear die also comprises four groups of transmission parts which respectively correspond to the four groups of sliding blocks, and a driving component which drives the four groups of transmission parts to open or close on a horizontal plane; the transmission piece is used for driving the sliding block to be close to or far away from the rear die core; the rear die also comprises four groups of transverse thimbles respectively corresponding to the four groups of slide block inserts; the transverse ejector pin is used for pushing a product on the rear die core when the sliding block descends along the inclined guide post; an ejector plate for mounting the transverse ejector pin, a push block fixedly arranged on one side of the ejector plate, which is far away from the transverse ejector pin, and a reset assembly for driving the ejector plate to reset are arranged in the sliding block; the movement direction of the ejector pin plate is the same as that of the sliding block; at least one of the slide block insert and the slide block is provided with the reset assembly; a first movable groove corresponding to the push block is formed in the side surface of the sliding block; the sliding block insert is provided with a second movable groove matched with the transverse thimble; one end of the push block, which is far away from the ejector plate, is provided with a first inclined plane; the front mould also comprises a limiting block; the lower end of the limiting block is provided with a second inclined plane matched with the first inclined plane.

On the other hand, the application method of the injection mold is provided, and the injection mold with the large core pulling stroke based on the synchronous action of the slide block and the rear mold comprises the following steps:

the first stage is mold opening: the rear die is far away from the front die, the sliding block slides to the lower right along the inclined guide post, the push block longitudinally moves along the limiting block, and the transverse ejector pin props against a product; when the die opening at the first stage is finished, the positioning assembly limits the guide groove in the axial direction of the inclined guide post;

and (3) second-stage mold opening: the first inclined plane of the pushing block is contacted with the second inclined plane of the limiting block, the resetting assembly resets, and the ejector plate is pushed rightwards; continuously opening the mold until the push block is completely separated from the limiting block;

and the third stage is die sinking: the driving component drives the transmission part to be far away from the rear die core, the transmission part firstly runs away from the sliding block, and then the sliding block is pushed rightwards;

a first stage of die assembly: the driving component drives the transmission part to be close to the rear mold core, the transmission part pushes the slide block leftwards, and the slide block insert are close to the rear mold core; when the first-stage die assembly is completed, the positioning assembly limits the guide groove in the axial direction of the inclined guide post;

and (3) second-stage die assembly: the back mould moves towards the front mould, the ejector pad moves upwards along the limiting block, the slide block moves upwards along the inclined guide post, and the transverse ejector pin and the slide block insert reset.

The invention has the beneficial effects that: through the combination of the inclined guide pillar and the driving assembly, the large core pulling stroke is realized, and in the mold opening and closing process, the sliding block can synchronously act with the rear mold, the action is reliable, and the production efficiency is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:

fig. 1 is a schematic overall structure diagram of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention;

fig. 2 is a schematic mold closing diagram of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention;

fig. 3 is a schematic state diagram of a push block when a first-stage mold opening of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention is performed;

FIG. 4 is an enlarged view at A in FIG. 2;

fig. 5 is a schematic mold opening diagram of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a state of a push block during a second-stage mold opening of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention;

FIG. 7 is an enlarged view at B in FIG. 5;

fig. 8 is a schematic mold opening diagram of a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a first embodiment of the present invention;

fig. 9 is a schematic state diagram of a push block in a third-stage mold opening of the large core-pulling stroke injection mold in which the slide block and the rear mold synchronously act according to the first embodiment of the present invention;

FIG. 10 is an enlarged view at C of FIG. 8;

FIG. 11 is a schematic structural view of a product;

fig. 12 is a schematic view illustrating the use of a magnet and an iron piece in a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.

Example one

The embodiment provides a large core-pulling stroke injection mold with a slide block and a rear mold acting synchronously, as shown in fig. 1-11, comprising a front mold 10 and a rear mold 11; the front mold 10 includes a front core 12; the rear mold 11 comprises a rear mold core 13; the rear mold 11 further includes four sets of slide block inserts 14 respectively corresponding to four outer side surfaces of the product 2, and four sets of slide blocks 15 respectively fixed to the four sets of slide block inserts 14; the front mold core 12, the rear mold core 13 and the four groups of slide block inserts 14 are matched to form an injection molding chamber matched with the product 2; the front die 10 further comprises four groups of inclined guide posts 16 respectively corresponding to the four groups of sliders 15; the lower end of the inclined guide post 16 is the end far away from the front die core 12; the upper surface of the slide block 15 is provided with a guide groove 180 matched with the inclined guide post 16; the rear mold 11 further includes a positioning member 17 defining an initial position of the skew guide post 16 before it enters the slider 15, and the positioning member 17 serves to define the guide groove 180 in an axial direction of the skew guide post 16; the positioning components 17 correspond to the sliding blocks 15 one by one;

the rear die 11 also comprises four groups of transmission members 18 respectively corresponding to the four groups of sliding blocks 15 and a driving component for driving the four groups of transmission members 18 to open or close on a horizontal plane; the transmission piece 18 is used for driving the slide block 15 to approach or depart from the rear die core 13; the rear mold 11 further includes four sets of lateral thimbles (not shown in the figure) respectively corresponding to the four sets of slide block inserts 14; a transverse ejector pin (not shown in the figure) is used for pushing the product 2 on the rear mold core 13 when the slide block 15 descends along the inclined guide post 16; an ejector plate 19 for mounting a transverse ejector pin (not shown in the figure), a push block 110 fixedly arranged on one side of the ejector plate 19, which is far away from the transverse ejector pin (not shown in the figure), and a reset component for driving the ejector plate 19 to reset are arranged in the slide block 15; the movement direction of the ejector plate 19 is the same as that of the slide block 15; at least one of the slide insert 14 and the slide 15 is provided with a reset component; a first movable groove (not shown) corresponding to the push block 110 is provided on a side surface of the slider 15; the slide insert 14 is provided with a second movable groove (not shown) adapted to the transverse thimble (not shown); one end of the push block 110 departing from the ejector plate 19 is provided with a first inclined surface 181; the front mold 10 further includes a stopper 111; the lower end of the limiting block 111 is provided with a second inclined plane 182 matched with the first inclined plane 181.

The injection mold has the advantages of large stroke and synchronous action of the slide block and the rear mold. Specifically, the method comprises the following steps:

the first stage is mold opening: the rear die 11 is far away from the front die 10, the slider 15 slides to the lower right along the inclined guide post 16, at this time, the push block 110 is pushed by the limit block 111, namely the first inclined plane 181 is not contacted with the second inclined plane 182, and the push block 110 can only move up and down along with the inclined guide post and cannot move left and right; therefore, when the slide insert 14 is separated from the product 2, a transverse thimble (not shown) on the thimble plate 19 abuts against the product 2, and the separation of the slide insert 14 from the product 2 is completed; in addition, when the first-stage mold opening is completed, the positioning assembly 17 limits the guide groove 180 in the axial direction of the oblique guide post 16; in addition, when the mold is opened in the first stage, the transmission piece 18 does not move, the sliding block 15 moves rightwards, and then the distance between the sliding block 15 and the transmission piece 18 is separated;

and (3) second-stage mold opening: the first inclined plane 181 of the push block 110 contacts with the second inclined plane 182 of the limit block 111, the reset assembly resets, the ejector plate 19 is pushed rightwards, and the separation of the transverse ejector pin (not shown in the figure) and the product 2 is completed; continuously opening the mold until the push block 110 is completely separated from the limit block 111;

and the third stage is die sinking: the driving component drives the transmission part 18 to be far away from the rear mold core 13, the transmission part 18 firstly finishes the distance between the transmission part and the slide block 15, and then pushes the slide block 15 rightwards to be far away from the rear mold core 13, so that complete tripping is realized, and a material taking space is provided for an operator or a manipulator;

a first stage of die assembly: the driving component drives the transmission part 18 to approach the rear mold core 13, and the transmission part 18 pushes the slide block 15 leftwards, so that the slide block 15 and the slide block insert 14 approach the rear mold core 13; upon completion of the first stage mold closing, the positioning member 17 defines the guide groove 180 in the axial direction of the angle post 16 in preparation for reinsertion of the angle post 16 into the slide block 15;

and (3) second-stage die assembly: the rear mold 11 moves towards the front mold 10, the push block 15 moves upwards along the limiting block 111, the slide block 15 moves upwards along the inclined guide post 16, the transverse ejector pin (not shown in the figure) and the slide block insert 14 are reset, and an injection molding chamber is formed by enclosing again for a new round of injection molding production.

In conclusion, the injection mold realizes large core-pulling travel by combining the inclined guide pillar and the driving assembly, and the slide block can synchronously act with the rear mold in the mold opening and closing process, so that the injection mold is reliable in action and high in production efficiency.

As shown in fig. 2, 4, 5, 7, 8 and 10, the rear mold 11 further includes a rear mold plate 112; the rear mold insert 13 is fixedly arranged on the upper surface of the rear template 112; the slide block insert 14, the slide block 15, the driving assembly and the ejector plate 19 are all arranged on the rear template 112; the positioning assembly 17 comprises an upper rubber block 113 fixed with the slide 15 and a lower rubber block 114 fixed with the rear template 112; one of the opposite ends of the upper rubber block 113 and the lower rubber block 114 is provided with a wavy limiting groove 183, and the other end is provided with a limiting bulge 115 matched with the limiting groove 183.

This injection mold possesses the advantage that location effect is good and with low costs. Specifically, the method comprises the following steps: when positioning is needed, the sliding block 15 drives the upper rubber block 113 to move towards the lower rubber block 114, the upper rubber block 113 extrudes the lower rubber block 114, and the limiting protrusion 115 enters the limiting groove 183, so that the guide groove 180 is limited in the axial direction of the inclined guide post 16; when the rubber block needs to be separated, the sliding block 15 drives the upper rubber block 113 to deviate from the lower rubber block 114, the upper rubber block 113 extrudes the lower rubber block 114, the limiting protrusion 115 is separated from the limiting groove 183, and a good limiting effect is achieved; in addition, the rubber has elasticity, the shape of the rubber can be changed through extrusion, a driving source for controlling the separation or the attachment of the two groups of rubber does not need to be additionally arranged, the installation is convenient, and the cost is low.

As shown in fig. 2, 5 and 8, the rear mold 11 further includes a transverse mounting rod 116 fixed to a side of the slide 15 away from the slide insert 14, and an inner stopper 117 and an outer stopper 118 sequentially sleeved and fixed on the transverse mounting rod 116; the rear mold 11 also comprises a travel switch 119 for the collision of the inner bumper 117 and the outer bumper 118; the travel switch 118 is fixed with the rear template 112; the center distance between the inner collision block 117 and the outer collision block 118 is the moving stroke of the slide block 15.

This injection mold possesses the accurate advantage of control. Specifically, when the inner collision block 117 collides with the travel switch 119, the slide block 15 has reached the farthest position, and is in a complete tripping state; when the outer collision block 118 collides with the travel switch 119, the slide block 15 reaches the nearest position, and is in a complete mold closing state, and the mold opening work and the mold closing work are accurately and orderly carried out by controlling the travel of the slide block 15.

As shown in fig. 1 and 2, the driving assembly includes four sets of cylinders 120 corresponding to the four sets of transmission members 18, respectively; the oil cylinder 120 is fixed with the rear template 112, and the oil cylinder is used as a driving source, so that the installation is convenient.

As shown in fig. 2, the transmission member 18 includes a mounting block 121, an inner pushing block 122 fixed on the mounting block 121 for pushing the inner side surface of the sliding block 15, and an outer pushing block (not shown) fixed on the mounting block 121 for pushing the outer side surface of the sliding block 15; the mounting block 121 is fixed with the movable end of the oil cylinder 120, and has a simple structure and low cost.

As shown in fig. 2, the rear template 112 is fixedly provided with a mounting seat 123 for mounting the oil cylinder 120, so as to facilitate the quick mounting of the oil cylinder 120; the mounting seats 123 correspond to the oil cylinders 120 one by one; the return assembly includes a spring 124; two ends of the spring 124 are respectively fixed with the slide block insert 14 and the ejector plate 19, and the spring 124 is used as a reset piece, so that the cost is low and the installation is convenient.

As shown in fig. 2, the rear mold 11 further includes four sets of limit ejector blocks 125 respectively corresponding to the four sets of ejector plates 19; one end of the limit ejector block 125 pushes the rear mold core 13, and the other end is fixed with the ejector plate 19; the rear template 112 is provided with a third movable groove adapted to the limit top block 125, so as to ensure that the limit top block 125 can always return to the same initial position.

As shown in fig. 2, the front mold 10 includes a front mold plate 126, a hot runner plate 127, and a front mold fixing plate 128, which are sequentially disposed; a front mold plate 126, a hot runner plate 127 and a front mold fixing plate 128, which are integrally fixed; the front die core 12, the inclined guide post 16 and the limiting block 111 are fixedly arranged on the front template 126; the lower surface of the front template 126 is provided with four groups of first alignment grooves which are matched with the four groups of slide block inserts 14 one by one, and four groups of second alignment grooves which are matched with the four groups of slide blocks 15 one by one; the first aligning groove is communicated with the second aligning groove, and when the sliding block 15 moves, the second aligning groove plays a certain guiding role on the sliding block 15.

Example two

This embodiment provides a slider and back mould synchronization action's big stroke injection mold of loosing core, and the same part no longer gives unnecessary details with embodiment one, and the difference lies in:

as shown in fig. 12, the stopper groove 183 is provided on the upper rubber block 113; the limiting bulge 115 is arranged on the lower rubber block 114; a magnet 129 is embedded in the limiting bulge 115; the bottom of the limiting groove 183 is embedded with an iron sheet 130 for the magnet 129 to adsorb; after the limiting protrusion 115 enters the limiting groove 183, the magnet 129 adsorbs the iron sheet 130, so that a good complex shape effect is achieved on the limiting protrusion 130, the limiting protrusion 115 and the limiting groove 183 can be better attached, and the positioning effect is optimized.

EXAMPLE III

The embodiment of the invention provides a using method of an injection mold, which comprises the following steps:

step S1: first stage mold opening

The rear die is far away from the front die, the sliding block slides to the lower right along the inclined guide post, the push block longitudinally moves along the limiting block, and the transverse ejector pin props against a product; when the first-stage die opening is completed, the guide groove is limited in the axial direction of the inclined guide post by the positioning assembly.

Step S2: second stage of opening the mould

The first inclined plane of the pushing block is contacted with the second inclined plane of the limiting block, the resetting assembly resets, and the ejector plate is pushed rightwards; and continuously opening the mold until the push block is completely separated from the limiting block.

Step S3: third stage mold opening

The driving component drives the driving part to be far away from the rear die core, the driving part firstly walks away from the sliding block, and then the sliding block is pushed rightwards.

Step S4: first stage mold closing

The driving component drives the transmission part to be close to the rear mold core, the transmission part pushes the slide block leftwards, and the slide block insert are close to the rear mold core; when the first-stage die assembly is completed, the positioning assembly limits the guide groove in the axial direction of the inclined guide post.

Step S5: second stage die assembly

The back mould moves towards the front mould, the ejector pad moves upwards along the limiting block, the slide block moves upwards along the inclined guide post, and the transverse ejector pin and the slide block insert reset.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. A large core-pulling stroke injection mold with a slide block and a rear mold synchronously acting comprises a front mold and a rear mold; the front die comprises a front die core; the rear die comprises a rear die core; the rear die is characterized by also comprising four groups of sliding block inserts respectively corresponding to four outer side surfaces of a product, and four groups of sliding blocks respectively fixed with the four groups of sliding block inserts; the front mold core, the rear mold core and the four groups of slide block inserts are matched to enclose an injection molding chamber matched with a product; the front die also comprises four groups of inclined guide posts which respectively correspond to the four groups of sliding blocks; the lower end of the inclined guide post is the end far away from the front die core; the upper surface of the sliding block is provided with a guide groove matched with the inclined guide post; the rear die further comprises a positioning assembly defining an initial position of the oblique guide post before the oblique guide post enters the slider, and the positioning assembly is used for defining the guide groove in an axial direction of the oblique guide post; the positioning assemblies correspond to the sliding blocks one to one;

the rear die also comprises four groups of transmission parts which respectively correspond to the four groups of sliding blocks, and a driving component which drives the four groups of transmission parts to open or close on a horizontal plane; the transmission piece is used for driving the sliding block to be close to or far away from the rear die core; the rear die also comprises four groups of transverse thimbles respectively corresponding to the four groups of slide block inserts; the transverse ejector pin is used for pushing a product on the rear die core when the sliding block descends along the inclined guide post; an ejector plate for mounting the transverse ejector pin, a push block fixedly arranged on one side of the ejector plate, which is far away from the transverse ejector pin, and a reset assembly for driving the ejector plate to reset are arranged in the sliding block; the movement direction of the ejector pin plate is the same as that of the sliding block; at least one of the slide block insert and the slide block is provided with the reset assembly; a first movable groove corresponding to the push block is formed in the side surface of the sliding block; the sliding block insert is provided with a second movable groove matched with the transverse thimble; one end of the push block, which is far away from the ejector plate, is provided with a first inclined plane; the front mould also comprises a limiting block; the lower end of the limiting block is provided with a second inclined plane matched with the first inclined plane.

2. The large core pulling stroke injection mold with the slide block and the rear mold synchronously acting according to claim 1, wherein the rear mold further comprises a rear mold plate; the rear die core is fixedly arranged on the upper surface of the rear template; the slide block insert, the slide block, the driving assembly and the ejector plate are all arranged on the rear template;

the positioning assembly comprises an upper rubber block fixed with the sliding block and a lower rubber block fixed with the rear template; one of the opposite end parts of the upper rubber block and the lower rubber block is provided with a wavy limiting groove, and the other end part is provided with a limiting bulge matched with the limiting groove.

3. The injection mold with the large core-pulling stroke and the synchronous action of the sliding block and the rear mold as claimed in claim 2, wherein the rear mold further comprises a transverse mounting rod fixedly arranged on one side of the sliding block, which is far away from the sliding block insert, and an inner collision block and an outer collision block which are sequentially sleeved and fixed on the transverse mounting rod; the rear die also comprises a travel switch for collision of the inner collision block and the outer collision block; the travel switch is fixed with the rear template; the center distance between the inner collision block and the outer collision block is the movable stroke of the sliding block.

4. The large core pulling stroke injection mold with the sliding block and the rear mold synchronously acting according to claim 2, wherein the limiting groove is formed in the upper rubber block; the limiting bulge is arranged on the lower rubber block; a magnet is embedded in the limiting bulge; and an iron sheet for the magnet to adsorb is embedded at the bottom of the limiting groove.

5. The large core pulling stroke injection mold with the sliding block and the rear mold synchronously acting according to claim 2, wherein the driving assembly comprises four groups of oil cylinders respectively corresponding to the four groups of driving members; the oil cylinder is fixed with the rear template.

6. The injection mold with the large core pulling stroke and the synchronous action of the sliding block and the rear mold as claimed in claim 5, wherein the transmission member comprises a mounting block, an inner pushing block fixedly arranged on the mounting block and used for pushing the inner side surface of the sliding block, and an outer pushing block fixedly arranged on the mounting block and used for pushing the outer side surface of the sliding block; the mounting block is fixed with the movable end of the oil cylinder.

7. The large core pulling stroke injection mold with the sliding block and the rear mold synchronously acting according to claim 5, wherein a mounting seat for mounting the oil cylinder is fixedly arranged on the rear mold plate; the mounting seats correspond to the oil cylinders one by one; the reset assembly comprises a spring; and two ends of the spring are respectively fixed with the sliding block insert and the ejector plate.

8. The large core pulling stroke injection mold with the sliding block and the rear mold synchronously acting according to claim 2, wherein the rear mold further comprises four groups of limit ejector blocks respectively corresponding to the four groups of ejector plates; one end of the limiting ejector block pushes the rear mold core, and the other end of the limiting ejector block is fixed with the ejector plate; the rear template is provided with a third movable groove matched with the limit jacking block.

9. The large core pulling stroke injection mold with the sliding block and the rear mold synchronously acting according to claim 2, wherein the front mold comprises a front mold plate, a hot runner plate and a front mold fixing plate which are sequentially arranged; the front template, the hot runner plate and the front mold fixing plate are integrally fixed; the front die core, the inclined guide column and the limiting block are fixedly arranged on the front template; four groups of first alignment grooves which are matched with the four groups of sliding block inserts one by one and four groups of second alignment grooves which are matched with the four groups of sliding blocks one by one are formed in the lower surface of the front template; the first aligning groove is communicated with the second aligning groove.

10. An application method of an injection mold, based on the injection mold with a large core-pulling stroke and a synchronous action of a slide block and a rear mold as claimed in any one of claims 1 to 9, is characterized by comprising the following steps:

the first stage is mold opening: the rear die is far away from the front die, the sliding block slides to the lower right along the inclined guide post, the push block longitudinally moves along the limiting block, and the transverse ejector pin props against a product; when the die opening at the first stage is finished, the positioning assembly limits the guide groove in the axial direction of the inclined guide post;

and (3) second-stage mold opening: the first inclined plane of the pushing block is contacted with the second inclined plane of the limiting block, the resetting assembly resets, and the ejector plate is pushed rightwards; continuously opening the mold until the push block is completely separated from the limiting block;

and the third stage is die sinking: the driving component drives the transmission part to be far away from the rear die core, the transmission part firstly runs away from the sliding block, and then the sliding block is pushed rightwards;

a first stage of die assembly: the driving component drives the transmission part to be close to the rear mold core, the transmission part pushes the slide block leftwards, and the slide block insert are close to the rear mold core; when the first-stage die assembly is completed, the positioning assembly limits the guide groove in the axial direction of the inclined guide post;

and (3) second-stage die assembly: the back mould moves towards the front mould, the ejector pad moves upwards along the limiting block, the slide block moves upwards along the inclined guide post, and the transverse ejector pin and the slide block insert reset.

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