Inner inclined core-pulling structure for automobile rear doorsill injection mold

By designing an inclined core extraction structure for automobile rear sill injection molds, the linkage movement of the slider and inclined guide columns solves the problem of inconsistent molding directions of the doghouse and the rear sill body, and realizes the accuracy of the finished product of the automobile rear sill and the improvement of pass rate.

CN222431463UActive Publication Date: 2025-02-07JIANGSU AILONGSEN AUTOMOTIVE PARTS CO LTD
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Patent Information

Application Number
CN202421178955.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-02-07
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

The existing automotive rear sill injection mold core extraction structure is difficult to meet the requirements of the simultaneous molding of the doghouse and the rear sill body, resulting in serious deformation or damage to the finished product, affecting the quality of the finished product.

Method used

Design an internal oblique core pulling structure, through the linkage movement of the slider and the inclined guide column, the kennel cavity moves to the outer peripheral side of the mold and disconnects from the kennel on the rear sill body, ensuring the smooth opening of the moving mold, solving the problem of The problem of inconsistent mold output direction.

Benefits of technology

Effectively prevent severe deformation or damage caused by the rear sill of the car during the demolding process, ensure the precision of the finished product, and improve the qualification rate of the finished product.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an inner inclined core-pulling structure for an automobile rear doorsill injection mold, which comprises a fixed block fixed on a movable mold, a sliding block I attached to the front side of the upper end surface of the fixed block, a sliding block III attached to the rear side of the upper end surface of the fixed block, a sliding block IV attached to the rear side surface of the fixed block, and a sliding block II attached to the lower side surface of the fixed block, an inclined guide column fixedly arranged on the fixed die is movably connected into an inclined guide hole in the front end of a first sliding block in a penetrating mode, the rear end of the first sliding block is in sliding fit with the front end of a third sliding block in the longitudinal direction through a first sliding assembly, and the lower side face of the first sliding block is in clamping fit with the upper side face of a second sliding block through a limiting assembly. The lower end of the fourth sliding block and the rear end of the second sliding block are in sliding fit in the longitudinal direction through a second sliding assembly, and the rear end of the fixing block, the rear end of the third sliding block and the upper end of the fourth sliding block are spliced and combined together to form a mold core block with a doghouse cavity. The problem that the doghouse and the rear doorsill body are inconsistent in demolding direction is solved, and the automobile rear doorsill is effectively prevented from being violently deformed or damaged in the demolding process.
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Description

Technical Field

[0001] The utility model relates to the technical field of injection molding of automobile rear door sills, in particular to an inner inclined core pulling structure used for an injection mold of an automobile rear door sill. Background Art

[0002] The frame structure is generally a support structure formed by multiple longitudinal beams and transverse beams. The frame structure is the structural carrier of the entire vehicle, used to support and connect various assemblies of the vehicle (such as the rear floor assembly, rear door sill assembly, rear wheel cover assembly, rear side panel assembly, etc.), so that each assembly maintains a relatively correct position and bears various loads inside and outside the vehicle. Among them, the rear door sill assembly of the vehicle is set between the lower B-pillar and the lower C-pillar of the vehicle and is located on the outer side of the longitudinal beam. It is mainly used to bear and transmit the stress from the rear side panel assembly and the rear wheel cover assembly. For example, the structure of the rear door sill assembly of the vehicle must bear the weight of the sliding door and buffer the stress from the sliding door; if a side collision occurs during the driving of the vehicle, the rear door sill assembly of the vehicle is also used to transmit and disperse the collision energy generated during the side collision.

[0003] like Figures 1-2 As shown, a rear door sill of an automobile comprises a rear door sill body A, wherein the right end of the rear door sill body A along the length direction is set as an upwardly warped arc-shaped transition structure A-2, and a doghouse A-3 with an opening facing obliquely upward to the right is set on the lower side of the arc-shaped transition structure A-2, and the lower side of the rear door sill body A and the lower side of the bottom of the doghouse A-3 are both provided with a buckle A-1 extending downward. Since the ejection direction of the doghouse A-3 on the rear door sill of the automobile is inconsistent with the ejection direction of the rear door sill body A, and the core-pulling structure in the existing automobile rear door sill injection mold is difficult to meet the requirement of ejecting the doghouse A-3 and the rear door sill body A at the same time, if the doghouse A-3 and the rear door sill body A are ejected at the same time by force, the finished automobile rear door sill will be severely deformed or even damaged, thereby making it difficult to ensure the quality of the finished automobile rear door sill. To this end, the utility model proposes an inner inclined core-pulling structure for an automobile rear door sill injection mold, in order to solve the above technical problems. Summary of the invention

[0004] The utility model aims to overcome the defects in the prior art and provide an inner inclined core pulling structure for an injection mold of a rear door sill of an automobile, wherein a slider one, a slider two, a slider three and a slider four form a linkage structure surrounding the outer peripheral side of a fixed block, and during the mold opening process after the rear door sill of the automobile is injection molded inside the mold, the movable mold is first opened by a certain distance, and during this process, the inclined guide column drives the slider one, the slider two, the slider three and the slider four to move in linkage, so that the doghouse cavity moves toward the outer peripheral side of the mold and separates from the doghouse on the rear door sill body inside the mold, thereby ensuring that the movable mold continues to open the door sill body smoothly after demolding, solving the problem that the demolding direction of the doghouse on the rear door sill of the automobile is inconsistent with the demolding direction of the rear door sill body, effectively preventing the rear door sill of the automobile from being drastically deformed or damaged during the demolding process, ensuring the accuracy of the finished product of the rear door sill of the automobile, and helping to greatly improve the finished product qualified rate of the rear door sill of the automobile.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is to design an inner inclined core-pulling structure for an automobile rear door sill injection mold, comprising a fixed block, a slider 1, an inclined guide column, a slider 2, a slider 3, and a slider 4. The fixed block is fixedly installed on the movable mold of the automobile rear door sill injection mold, the slider 1 is fitted on the front side of the upper end surface of the fixed block, the slider 3 is fitted on the rear side of the upper end surface of the fixed block, the slider 4 is fitted on the rear side surface of the fixed block, the slider 2 is fitted on the lower side surface of the fixed block, and the inclined guide column is movably connected to the inclined Inside the guide hole, the end of the movable mold of the injection mold for the rear door sill of the automobile is fixedly arranged on the fixed mold of the injection mold for the rear door sill of the automobile. The rear end of the slider one and the front end of the slider three are slidably matched in the longitudinal direction through the sliding component one. The lower side of the slider is snap-fitted with the upper side of the slider two through the limiting component. The lower end of the slider four and the rear end of the slider two are slidably matched in the longitudinal direction through the sliding component two. The rear end of the fixed block, the rear end of the slider three and the upper end of the slider four are spliced ​​and combined together to form a core block. The core block is provided with a doghouse cavity for forming a doghouse on the rear door sill of the automobile.

[0006] The utility model discloses an inner inclined core-pulling structure for an injection mold of a rear door sill of an automobile. A slider one, a slider two, a slider three and a slider four form a linkage structure surrounding the outer peripheral side of a fixed block. During the mold opening process after the rear door sill of the automobile is injection molded inside the mold, the movable mold is first opened by a certain distance. During this process, an inclined guide column drives the slider one, the slider two, the slider three and the slider four to move in linkage, so that the doghouse cavity moves toward the outer peripheral side of the mold and separates from the doghouse on the rear door sill body inside the mold, thereby ensuring that the movable mold continues to open smoothly after demolding the door sill body, solving the problem that the demolding direction of the doghouse on the rear door sill of the automobile is inconsistent with the demolding direction of the rear door sill body, effectively preventing the rear door sill of the automobile from being drastically deformed or damaged during the demolding process, ensuring the accuracy of the finished product of the rear door sill of the automobile, and helping to greatly improve the finished product qualified rate of the rear door sill of the automobile.

[0007] The preferred technical solution is that the front side of the upper end surface of the fixing block is provided with an inclined surface 1 whose lower end is located at the rear side, the rear side of the upper end surface of the fixing block is provided with a groove body 1 opening upward, the lower end surface of the fixing block is provided with a groove body 2 opening downward, and the groove body 1 and the groove body 2 both penetrate the front and rear side surfaces of the fixing block, and the rear side surface of the fixing block is provided with a groove body 3 penetrating the groove body 1 and the groove body 2 and opening toward the rear side;

[0008] The slider 1 is an L-shaped structure, the oblique guide hole is provided on the horizontal section of the slider 1 facing the front side, a T-shaped block 1 along the longitudinal direction is provided on the rear side of the vertical section of the slider 1, and a limit groove opening downward is provided on the rear side of the bottom of the slider 1;

[0009] A limit block is provided on the front side of the upper end of the slider 2 and is engaged with the limit groove. A T-shaped oblique groove is provided at the rear end of the slider 2 and the lower end is located below the rear side. The limit groove and the limit block constitute the limit assembly.

[0010] The lower end of the slider three is provided with an inclined surface two corresponding to and fitting with the inclined surface one, the front side of the slider three is longitudinally provided with a T-shaped slot opening toward the front side, the rear side of the slider three is provided with a support arm extending to the rear side and movably connected to the interior of the upper groove body one of the fixed block, the rear end of the fixed block, the rear end of the support arm, and the upper end of the slider four are spliced ​​and combined together to form a core block, the rear end of the support arm is also provided with a core-pulling block located on the upper side of the doghouse cavity, the T-block one of the slider one is slidably embedded in the interior of the T-shaped slot, and the T-block one and the T-shaped slot constitute the sliding component one;

[0011] The slider 4 is slidably embedded in the groove body 3 of the fixed block, and the lower end of the slider 4 is provided with a T-block 2 adapted to the T-shaped bevel groove. The lower end of the slider 4 is slidably embedded in the T-shaped bevel groove of the slider 2 through the T-block 2. The T-block 2 and the T-shaped bevel groove constitute the sliding assembly 2. The layout and installation structure of the slider 1, the slider 2, the slider 3, and the slider 4 on the fixed block are reasonable, thereby ensuring that an efficient linkage motion relationship is formed between the four sliders, and ensuring that the inner inclined core pulling structure of the utility model can be smoothly prepared and implemented.

[0012] A further preferred technical solution is that the rear side of the upper end surface of the fixed block is also provided with a step surface located on the left and right sides of the inclined surface 1, and also includes two pressing blocks, the two pressing blocks are respectively fixed on the step surfaces on the left and right sides of the inclined surface 1, the two pressing blocks are respectively provided with a boss facing the inclined surface 1, the lower side surface of the boss on the pressing block and the left edge or right edge of the inclined surface 2 form an inclined guide groove with the lower end located at the rear side, and the lower end surface of the slider 3 is provided with an inclined eaves located on the left and right sides of the inclined surface 2, and the inclined eaves are slidably embedded in the corresponding inclined guide groove. The inclined eaves located on the left and right sides of the lower end surface of the slider 3 are respectively slidably embedded in the corresponding inclined guide groove, ensuring the stability of the matching relationship between the slider 3 and the slider 1, which helps to improve the stability of the sliders 1, 2, 3, and 4 when they move in linkage on the fixed block.

[0013] A further preferred technical solution is that the front side surface of the vertical section of the slider 1 is provided with an inclined surface 3, and the inclined direction of the inclined surface 3 is consistent with the inclined direction of the inclined guide pillar, so that the slider 1 and the inclined guide pillar have good cooperative adaptability, ensuring that when the inclined guide pillar drives the slider 1 to move, there is no mutual obstruction between the two, thereby ensuring smooth demoulding.

[0014] A further preferred technical solution is that wear-resistant pads are respectively embedded and fixed inside the grooves on the inclined surface 1 and the inclined surface 3. Inclined surface 1 and inclined surface 3 are two locations with severe wear. The wear-resistant pads are arranged at these two locations to facilitate the later inspection and maintenance of the inner inclined core pulling structure of the utility model.

[0015] A further preferred technical solution is that the pressure block, step surface, inclined surface one and inclined surface three are respectively provided with mounting holes, the pressure block is fixed to the step surface by screws passing through the inside of its mounting holes, and the wear-resistant pad is fixed to the inside of the groove on inclined surface one or inclined surface three by screws passing through the inside of it.

[0016] The advantages and beneficial effects of the utility model are:

[0017] 1. The utility model discloses an inner inclined core-pulling structure for an injection mold of a rear door sill of an automobile. Slide block 1, slide block 2, slide block 3 and slide block 4 form a linkage structure surrounding the outer peripheral side of a fixed block. During the mold opening process after the rear door sill of the automobile is injection molded inside the mold, the movable mold is first opened by a certain distance. During this process, the inclined guide column drives the slide block 1, slide block 2, slide block 3 and slide block 4 to move in linkage, so that the doghouse cavity moves toward the outer peripheral side of the mold and separates from the doghouse on the rear door sill body inside the mold, thereby ensuring that the movable mold continues to open smoothly after demolding the door sill body, solving the problem that the demolding direction of the doghouse on the rear door sill of the automobile is inconsistent with the demolding direction of the rear door sill body, effectively preventing the rear door sill of the automobile from being drastically deformed or damaged during the demolding process, ensuring the accuracy of the finished product of the rear door sill of the automobile, and helping to greatly improve the finished product qualification rate of the rear door sill of the automobile.

[0018] 2. The layout and installation structure of slider 1, slider 2, slider 3, and slider 4 on the fixed block are reasonable, thereby ensuring that an efficient linkage motion relationship is formed between the four sliders, ensuring that the inner inclined core pulling structure of the utility model can be smoothly prepared and implemented.

[0019] 3. The oblique eaves on the left and right sides of the lower end surface of the slider three are respectively slidably embedded in the corresponding oblique guide grooves, ensuring the stability of the matching relationship between the slider three and the slider one, and helping to improve the stability of the sliders one, two, three and four when they move in linkage on the fixed block.

[0020] 4. The front side surface of the vertical section of the slider 1 is provided with an inclined surface 3, and the inclined direction of the inclined surface 3 is consistent with the inclined direction of the inclined guide column. This makes the slider 1 and the inclined guide column have good cooperative adaptability, ensuring that when the inclined guide column drives the slider 1 to move, there is no mutual obstruction between the two, thereby ensuring smooth demoulding.

[0021] 5. Inclined surface 1 and inclined surface 3 are two locations with severe wear. Wear-resistant pads are arranged at these two locations to facilitate the later inspection and maintenance of the inner inclined core pulling structure of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a rear door sill of an automobile in the background art;

[0023] Figure 2 yes Figure 1 A partial enlarged view of the H in the middle;

[0024] Figure 3 This is a left front side perspective stereogram of the inner inclined core pulling structure of the utility model for the automobile rear door sill injection mold;

[0025] Figure 4 This is a right rear side perspective stereogram of the inner inclined core pulling structure of the utility model for the automobile rear door sill injection mold;

[0026] Figure 5 yes Figure 4 A partial enlarged view of the middle W;

[0027] Figure 6 It is a right-side perspective stereogram of the fixed block (the right-side pressure block is hidden);

[0028] Figure 7 It is a stereoscopic image of the fixed block from the left rear side (with the pressing block hidden);

[0029] Figure 8 This is a left side view of the inner inclined core pulling structure of the utility model for the automobile rear door sill injection mold;

[0030] Fig. 9 It is a left side view of the assembly relationship of slider 1, inclined guide column, slider 2, slider 3 and slider 4;

[0031] Fig.10 This is a disassembled relationship diagram of slider one, inclined guide column, slider two, slider three, and slider four.

[0032] In the figure: A, rear door sill body; A-1, buckle; A-2, arc-shaped transition structure; A-3, doghouse; 1, fixing block; 2, slider one; 3, oblique guide column; 4, slider two; 5, slider three; 6, slider four; 7, pressing block; 8, doghouse cavity; 9, oblique guide groove; 10, wear-resistant pad; 11, core block; 1-1, inclined surface one; 1-2, step surface; 1-3, groove body one; 1-4, groove body two; 1-5, groove body three; 2-1, oblique guide hole; 2-2, T-block one; 2-3, limiting groove; 2-4, inclined surface three; 4-1, limiting block; 4-2, T-type oblique groove; 5-1, inclined surface two; 5-2, T-slot; 5-3, support arm; 5-3a, core pulling block; 5-4, oblique eaves; 6-1, T-block two; 7-1, boss. DETAILED DESCRIPTION

[0033] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0034] Example

[0035] like Figures 3 to 10As shown, the utility model is an inner inclined core-pulling structure for an injection mold for a rear door sill of an automobile, comprising a fixed block 1, a slider 1 2, an inclined guide column 3, a slider 2 4, a slider 3 5, and a slider 4 6. The fixed block 1 is fixedly installed on a movable mold of the injection mold for the rear door sill of an automobile, the slider 1 2 is fitted on the front side of the upper end surface of the fixed block 1, the slider 3 5 is fitted on the rear side of the upper end surface of the fixed block 1, the slider 4 6 is fitted on the rear side surface of the fixed block 1, the slider 2 4 is fitted on the lower side surface of the fixed block 1, and the inclined guide column 3 is movably connected to the inside of the inclined guide hole 2-1 at the front end of the slider 1 2 , and the end of the inclined guide column 3 away from the movable mold of the automobile rear door sill injection mold is fixed on the fixed mold of the automobile rear door sill injection mold, the rear end of the slider 1 2 and the front end of the slider 3 5 are slidably matched in the longitudinal direction through a sliding component 1, the lower side of the slider 1 2 is snap-fitted with the upper side of the slider 2 4 through a limiting component, the lower end of the slider 4 6 and the rear end of the slider 2 4 are slidably matched in the longitudinal direction through a sliding component 2, the rear end of the fixed block 1, the rear end of the slider 3 5, and the upper end of the slider 4 6 are spliced ​​and combined together to form a core block 11, and the core block 11 is provided with a doghouse cavity 8 for molding a doghouse A-3 on the automobile rear door sill.

[0036] Preferably, the front side of the upper end surface of the fixing block 1 is provided with an inclined surface 1-1 with a lower end located at the rear side, the rear side of the upper end surface of the fixing block 1 is provided with a groove body 1-3 with an opening upward, the lower end surface of the fixing block 1 is provided with a groove body 2 1-4 with an opening downward, and the groove body 1-3 and the groove body 2 1-4 both penetrate the front and rear side surfaces of the fixing block 1, and the rear side surface of the fixing block 1 is provided with a groove body 3 1-5 penetrating the groove body 1-3 and the groove body 2 1-4 and opening toward the rear side;

[0037] The slider 2 is an L-shaped structure, the oblique guide hole 2-1 is provided on the horizontal section of the slider 2 facing the front side, a T-shaped block 2-2 along the longitudinal direction is provided on the rear side of the vertical section of the slider 2, and a limit groove 2-3 opening downward is provided on the rear side of the bottom of the slider 2;

[0038] The front side of the upper end of the slider 2-4 is provided with a limit block 4-1 which is embedded and engaged with the limit groove 2-3, and the rear end of the slider 2-4 is provided with a T-shaped inclined groove 4-2 whose lower end is located below the rear side. The limit groove 2-3 and the limit block 4-1 constitute the limit assembly;

[0039] The lower end of the slider 3 5 is provided with an inclined surface 2 5-1 corresponding to and fitting with the inclined surface 1-1, the front side surface of the slider 3 5 is longitudinally provided with a T-slot 5-2 with an opening facing the front side, the rear side surface of the slider 3 5 is provided with a support arm 5-3 extending to the rear side and movably connected to the interior of the upper groove body 1-3 of the fixed block 1, the rear end of the fixed block 1, the rear end of the support arm 5-3, and the upper end of the slider 4 6 are spliced ​​and combined together to form a core block 11, the rear end of the support arm 5-3 is also provided with a core pulling block 5-3a located on the upper side of the doghouse cavity 8, the T-block 1-2-2 of the slider 1 2 is slidably embedded in the T-slot 5-2, and the T-block 1-2-2 and the T-slot 5-2 constitute the sliding component 1;

[0040] The slider 4 6 is slidably embedded in the groove body 3 1-5 of the fixed block 1, and the lower end of the slider 4 6 is provided with a T-block 2 6-1 adapted to the T-slot 4-2. The lower end of the slider 4 6 is slidably embedded in the T-slot 4-2 of the slider 2 4 through the T-block 2 6-1. The T-block 2 6-1 and the T-slot 4-2 constitute the sliding component 2.

[0041] Further preferably, the rear side of the upper end surface of the fixed block 1 is also provided with a step surface 1-2 located on the left and right sides of the inclined surface 1-1, and also includes two pressing blocks 7, the two pressing blocks 7 are respectively fixed on the step surfaces 1-2 on the left and right sides of the inclined surface 1-1, the two pressing blocks 7 are respectively provided with a boss 7-1 facing the inclined surface 1-1, the lower side surface of the boss 7-1 on the pressing block 7 and the left edge or right edge of the inclined surface 5-1 form an inclined guide groove 9 with the lower end located on the rear side, the lower end surface of the sliding block 3 5 is provided with an inclined eaves 5-4 located on the left and right sides of the inclined surface 5-1, and the inclined eaves 5-4 are slidably embedded in the corresponding inclined guide groove 9.

[0042] Further preferably, the front side surface of the vertical section of the slider 1 2 is provided with an inclined surface 3 2 - 4 , and the inclination direction of the inclined surface 3 2 - 4 is consistent with the inclination direction of the inclined guide column 3 .

[0043] Further preferably, wear-resistant pads 10 are respectively embedded and fixed inside the grooves on the inclined surface 1-1 and the inclined surface 3 2-4.

[0044] Further preferably, mounting holes are respectively provided on the pressure block 7, the step surface 1-2, the inclined surface 1-1 and the inclined surface 3 2-4, the pressure block 7 is fixed to the step surface 1-2 by screws passing through the inside of its mounting holes, and the wear-resistant pad 10 is fixed to the inside of the groove on the inclined surface 1-1 or the inclined surface 3 2-4 by screws passing through the inside thereof.

[0045] The demoulding working principle of the inner inclined core pulling structure of the utility model for the automobile rear door sill injection mold is as follows:

[0046] After the rear door sill of the automobile is injection molded inside the mold, the mold opening program is started through the control system. First, the movable mold is opened a certain distance relative to the fixed mold. During the opening process of the movable mold, the inclined guide column 3 drives the slider 1 2 to move toward the outer peripheral side of the mold. At the same time, the slider 1 2 drives the slider 2 4 to move synchronously toward the outside of the mold through the limit assembly. The slider 3 5 moves downward relative to the slider 1 2 through the sliding assembly 1. Similarly, the slider 4 6 moves downward relative to the movable slider 2 4 through the sliding assembly 2, so that the doghouse cavity 8 is detached from the arc-shaped transition structure A-2 of the rear door sill body A inside the mold, even if the core pulling block 5-3a is pulled out of the doghouse A-3; then, the movable mold continues to open, and the subsequent demolding operation of the rear door sill body A is completed.

[0047] The utility model discloses an inner inclined core-pulling structure for an injection mold of a rear door sill of an automobile. A slider one, a slider two, a slider three and a slider four form a linkage structure surrounding the outer peripheral side of a fixed block. During the mold opening process after the rear door sill of the automobile is injection molded inside the mold, the movable mold is first opened by a certain distance. During this process, an inclined guide column drives the slider one, the slider two, the slider three and the slider four to move in linkage, so that the doghouse cavity moves toward the outer peripheral side of the mold and separates from the doghouse on the rear door sill body inside the mold, thereby ensuring that the movable mold continues to open smoothly after demolding the door sill body, solving the problem that the demolding direction of the doghouse on the rear door sill of the automobile is inconsistent with the demolding direction of the rear door sill body, effectively preventing the rear door sill of the automobile from being drastically deformed or damaged during the demolding process, ensuring the accuracy of the finished product of the rear door sill of the automobile, and helping to greatly improve the finished product qualified rate of the rear door sill of the automobile.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An inner inclined core pulling structure for an injection mold of a rear door sill of an automobile, characterized in that: The invention comprises a fixed block (1), a slider 1 (2), an inclined guide column (3), a slider 2 (4), a slider 3 (5), and a slider 4 (6); the fixed block (1) is fixedly mounted on a movable mold of an injection mold for a rear door sill of an automobile; the slider 1 (2) is located in affixed relation to the front side of the upper end surface of the fixed block (1); the slider 3 (5) is located in affixed relation to the rear side of the upper end surface of the fixed block (1); the slider 4 (6) is located in affixed relation to the rear side surface of the fixed block (1); the slider 2 (4) is located in affixed relation to the lower side surface of the fixed block (1); the inclined guide column (3) is movably connected to the inside of an inclined guide hole (2-1) at the front end of the slider 1 (2); and the inclined guide column (3) is away from the automobile. One end of the movable mold of the rear door sill injection mold is fixed on the fixed mold of the automobile rear door sill injection mold, the rear end of the slider one (2) and the front end of the slider three (5) are slidably matched in the longitudinal direction through a sliding component one, the lower side of the slider one (2) is snap-fitted with the upper side of the slider two (4) through a limiting component, the lower end of the slider four (6) and the rear end of the slider two (4) are slidably matched in the longitudinal direction through a sliding component two, the rear end of the fixed block (1), the rear end of the slider three (5) and the upper end of the slider four (6) are spliced ​​and combined together to form a core block (11), and the core block (11) is provided with a dog kennel cavity (8) for molding a dog kennel (A-3) on the automobile rear door sill.

2. The inner inclined core pulling structure for the automobile rear door sill injection mold according to claim 1, characterized in that: The front side of the upper end surface of the fixing block (1) is provided with an inclined surface (1-1) with a lower end located at the rear side, the rear side of the upper end surface of the fixing block (1) is provided with a groove body (1-3) with an opening facing upward, the lower end surface of the fixing block (1) is provided with a groove body (1-4) with an opening facing downward, and the groove body (1-3) and the groove body (1-4) both penetrate the front and rear side surfaces of the fixing block (1), and the rear side surface of the fixing block (1) is provided with a groove body (1-5) penetrating the groove body (1-3) and the groove body (1-4) and opening toward the rear side; The slider 1 (2) is an L-shaped structure, the oblique guide hole (2-1) is provided on the horizontal section of the slider 1 (2) facing the front side, a T-shaped block 1 (2-2) along the longitudinal direction is provided on the rear side of the vertical section of the slider 1 (2), and a limiting groove (2-3) opening downward is provided on the rear side of the bottom of the slider 1 (2); A limiting block (4-1) which is embedded and engaged with the limiting groove (2-3) is provided on the front side of the upper end of the slider (4), and a T-shaped inclined groove (4-2) whose lower end is located below the rear side is provided at the rear end of the slider (4), and the limiting groove (2-3) and the limiting block (4-1) constitute the limiting assembly; The lower end of the slider three (5) is provided with a slope two (5-1) corresponding to and fitting with the slope one (1-1); the front side surface of the slider three (5) is longitudinally provided with a T-shaped groove (5-2) with an opening facing the front side; the rear side surface of the slider three (5) is provided with a support arm (5-3) extending to the rear side and movably connected to the interior of the upper groove body one (1-3) of the fixed block (1); the rear end of the fixed block (1), the rear end of the support arm (5-3), and the upper end of the slider four (6) are spliced ​​and combined together to form a core block (11); the rear end of the support arm (5-3) is also provided with a core pulling block (5-3a) located on the upper side of the doghouse cavity (8); the T-shaped block one (2-2) of the slider one (2) is slidably embedded in the interior of the T-shaped groove (5-2); the T-shaped block one (2-2) and the T-shaped groove (5-2) constitute the sliding component one; The slider 4 (6) is slidably embedded in the groove body 3 (1-5) of the fixed block (1), and the lower end of the slider 4 (6) is provided with a T-shaped block 2 (6-1) adapted to the T-shaped inclined groove (4-2). The lower end of the slider 4 (6) is slidably embedded in the T-shaped inclined groove (4-2) of the slider 2 (4) through the T-shaped block 2 (6-1). The T-shaped block 2 (6-1) and the T-shaped inclined groove (4-2) constitute the sliding assembly 2.

3. The inner inclined core pulling structure for the automobile rear door sill injection mold according to claim 2, characterized in that: The rear side of the upper end surface of the fixed block (1) is also provided with a step surface (1-2) located on the left and right sides of the inclined surface one (1-1), and also includes two pressing blocks (7). The two pressing blocks (7) are respectively fixed on the step surfaces (1-2) on the left and right sides of the inclined surface one (1-1). The two pressing blocks (7) are respectively provided with a boss (7-1) facing the inclined surface one (1-1). The lower side surface of the boss (7-1) on the pressing block (7) and the left edge or right edge of the inclined surface two (5-1) form an inclined guide groove (9) with the lower end located on the rear side. The lower end surface of the sliding block three (5) is provided with an inclined eaves body (5-4) located on the left and right sides of the inclined surface two (5-1). The inclined eaves body (5-4) is slidably embedded in the corresponding inclined guide groove (9).

4. The inner inclined core pulling structure for the automobile rear door sill injection mold according to claim 3, characterized in that: The front side surface of the vertical section of the sliding block one (2) is provided with an inclined surface three (2-4), and the inclined direction of the inclined surface three (2-4) is consistent with the inclined direction of the inclined guide column (3).

5. The inner inclined core pulling structure for the automobile rear door sill injection mold according to claim 4, characterized in that: Wear-resistant pads (10) are respectively embedded and fixed inside the grooves on the inclined surface one (1-1) and the inclined surface three (2-4).

6. The inner inclined core pulling structure for the automobile rear door sill injection mold according to claim 5, characterized in that: The pressing block (7), the step surface (1-2), the inclined surface one (1-1) and the inclined surface three (2-4) are respectively provided with mounting holes, the pressing block (7) is fixed to the step surface (1-2) by screws penetrating the inside of the mounting holes, and the wear-resistant pad (10) is fixed to the inside of the groove on the inclined surface one (1-1) or the inclined surface three (2-4) by screws penetrating the inside thereof.