A locating core-pulling mechanism of an injection mold for an automobile lower trim panel

Abstract

The application relates to a locating core-pulling mechanism of an automobile lower trim injection mold, which comprises a primary slider, at least two first square guide columns which are obliquely and transversely connected in the primary slider and are arranged in parallel with each other, a secondary slider which is movably connected on the top of the primary slider and has a horizontal translation function, a first round guide column which is obliquely and transversely connected in the secondary slider, a first locating block which is fixed on the right outer wall of the secondary slider, a tertiary slider which is movably connected on the top of the primary slider and has an up-down oblique movement function and is arranged above the first locating block, a second square guide column which is obliquely and transversely connected in the primary slider and is arranged below the first locating block, and a pin which is transversely and movably inserted in the right side of the primary slider and has a horizontal translation function. The application reduces the manufacturing cost of the mold, simplifies the installation and debugging process, and reduces the processing and assembling difficulty.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel. Background Technology

[0002] Automotive lower trim panels are plastic panels installed at the bottom of vehicles or below the doors. They are mainly used to protect the vehicle body, enhance aesthetics, and optimize aerodynamic performance. Like other plastic parts, the production of automotive lower trim panels requires the use of matching injection molds. An injection mold is an industrial tool used for plastic injection molding. By injecting molten plastic into a closed cavity and allowing it to cool and solidify, it produces plastic products with complex shapes and precise dimensions. The core-pulling mechanism of an injection mold is a mechanism used to form lateral protrusions and concavities (such as holes, threads, etc.) and achieve demolding. It mainly consists of components such as sliders, inclined guide pillars, and locking blocks, and the core-pulling action is completed through mechanical or hydraulic drive.

[0003] Existing injection mold core-pulling mechanisms, if mechanically driven, have a maximum of only two stages of motion. Therefore, they cannot complete some molding steps with complex lateral structures. The number of core-pulling stages can only be increased by adding several hydraulic cylinders to achieve hydraulic drive. This results in higher mold manufacturing costs, and the timing of the actions between each cylinder is difficult to coordinate, making the installation and debugging process cumbersome. In addition, the sliders connected to each cylinder are prone to interference with mechanically driven sliders, making processing and assembly difficult and requiring urgent solutions. Summary of the Invention

[0004] In view of the current state of the prior art, the technical problem to be solved by the present invention is to provide an alignment and core-pulling mechanism for automotive lower trim panel injection molds that achieves four-stage core-pulling action solely through mechanical drive, thereby reducing mold manufacturing costs, simplifying the installation and debugging process, and reducing processing and assembly difficulty.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problem is: a core-pulling mechanism for an injection mold of an automotive lower trim panel, comprising a primary slide block and at least two first guide pillars that are obliquely interlocked in the primary slide block and are arranged parallel to each other, characterized in that: Each of the first guide posts has a vertically arranged retaining section formed at its upper end; It also includes a secondary slider that is movably connected to the top of the primary slider to have a lateral translation function, and a first circular guide post that is obliquely inserted into the secondary slider. The movement direction of the secondary slider is parallel to the movement direction of the primary slider. It also includes a first alignment block fixed on the outer right side of the secondary slider and a tertiary slider movably connected to the top of the primary slider to have the function of vertical tilting and is located above the first alignment block. The bottom of the tertiary slider is movably connected to the top of the first alignment block to have the function of horizontal tilting. It also includes a second guide post that is obliquely inserted into the first slider and located below the first alignment block, and a pin that is laterally and movably inserted into the right side of the first slider to have a lateral translation function. The length of the second square guide post is greater than the thickness of the first-stage slider so that the upper or lower end of the second square guide post extends above the top or below the bottom of the first-stage slider, respectively. The upper end of the second square guide post cooperates with the bottom outer wall of the first alignment block. The pin moves in a direction parallel to the direction of movement of the first-stage slider. The left end of the pin is movably connected to the right outer wall of the second guide post to enable it to tilt up and down.

[0006] Preferably, a first guide slope is formed on the top of the first alignment block, and correspondingly, a second guide slope is formed at the bottom of the three-stage slider to cooperate with the first guide slope, and the second guide slope slides against the first guide slope.

[0007] Preferably, a limiting block is also embedded on the right edge of the second guide slope, the bottom outer wall of the limiting block is flush with the second guide slope, and a sloping protrusion is formed downward on the right edge of the bottom outer wall of the limiting block. Correspondingly, a sloping notch that cooperates with the sloping protrusion is opened on the right edge of the first guide slope.

[0008] Preferably, an auxiliary inclined surface is formed at both the upper and lower ends of the second square guide post. The upper auxiliary inclined surface is set with the left side lower than the right side and cooperates with the lower edge of the end of the first alignment block. The lower auxiliary inclined surface is set with the left side higher than the right side.

[0009] Preferably, it further includes a second alignment block located to the right of the first-stage slider and at least two second circular guide posts that are obliquely interspersed in the second alignment block and are arranged parallel to each other. The oblique direction of the second circular guide post is matched with the oblique direction of the first guide post so that the movement directions of the second alignment block and the first-stage slider are opposite to each other.

[0010] Preferably, a first molding block is formed on the right side of the primary slider towards the second alignment block, and correspondingly, a second molding block is formed on the left side of the second alignment block towards the primary slider, which cooperates with the first molding block.

[0011] Preferably, a first arc-shaped surface is formed on the outer wall of the end of the first molding block, and correspondingly, a second arc-shaped surface is formed on the outer wall of the end of the second molding block that cooperates with the first arc-shaped surface.

[0012] Preferably, a stepped protrusion is formed on the second arc-shaped surface in the direction of the first arc-shaped surface, and correspondingly, a stepped cavity is formed on the first arc-shaped surface to cooperate with the stepped protrusion.

[0013] Preferably, an opening protrusion is formed on the end face of the stepped protrusion in the direction of the stepped cavity, and correspondingly, an opening recess is formed on the bottom surface of the stepped cavity to cooperate with the opening protrusion.

[0014] Preferably, the ends of the first alignment block and the ends of the three-stage slider are respectively formed with a third arc forming surface and a fourth arc forming surface that cooperate with the second arc forming surface.

[0015] Compared with the prior art, the advantages of the present invention are as follows: This invention achieves four-stage core-pulling action using only mechanical drive. Even without the addition of hydraulic cylinders, it can smoothly complete the molding steps with relatively complex lateral structures, thereby reducing the mold manufacturing cost and simplifying the installation and debugging process. In addition, it can better avoid interference between the sliders at each stage, thus reducing the difficulty of processing and assembly. Attached Figure Description

[0016] Figure 1 This is a top-down exploded view of the present invention; Figure 2 This is an exploded top-side structural diagram of the secondary slider, the first alignment block, the tertiary slider, and the limiting block of the present invention; Figure 3 This is an exploded view of the first-stage slider and the second alignment block of the present invention from an overhead perspective. Figure 4 This is a top-side structural diagram of the second alignment block of the present invention. Detailed Implementation

[0017] 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 after 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. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0018] 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.

[0019] like Figures 1-4 As shown, an alignment and core-pulling mechanism for an injection mold of a lower trim panel of an automobile includes a primary slide block 1 and at least two first guide pillars 2 that are inclined and interlocked in the primary slide block 1 and are arranged parallel to each other. Each of the first guide posts 2 has a vertically arranged retaining section 21 formed at its upper end; It also includes a secondary slider 3 that is movably connected to the top of the primary slider 1 to have a lateral translation function, and a first circular guide post 4 that is obliquely inserted into the secondary slider 3. The movement direction of the secondary slider 3 is parallel to the movement direction of the primary slider 1. It also includes a first alignment block 5 fixed on the outer right side of the secondary slider 3 and a tertiary slider 6 movably connected to the top of the primary slider 1 to have the function of tilting up and down and located above the first alignment block 5. The bottom of the tertiary slider 6 is movably connected to the top of the first alignment block 5 to have the function of tilting laterally. It also includes a second guide post 7 that is obliquely inserted into the first slider 1 and located below the first alignment block 5, and a pin 8 that is laterally and movably inserted into the right side of the first slider 1 to have a lateral translation function. The length of the second guide post 7 is greater than the thickness of the first slider 1 so that the upper end or the lower end of the second guide post 7 extends above the top or below the bottom of the first slider 1, respectively, and the upper end of the second guide post 7 cooperates with the bottom outer wall of the first alignment block 5. The moving direction of the pin 8 is parallel to the moving direction of the first-stage slider 1. The left end of the pin 8 is movably connected to the right outer wall of the second guide post 7 so as to have the function of tilting up and down.

[0020] The top of the first alignment block 5 has a first guide slope 51, and correspondingly, the bottom of the three-stage slider 6 has a second guide slope 61 that cooperates with the first guide slope 51. The second guide slope 61 slides against the first guide slope 51.

[0021] The right edge of the second guide slope 61 is also fitted with a limiting block 11. The bottom outer wall of the limiting block 11 is flush with the second guide slope 61. The right edge of the bottom outer wall of the limiting block 11 is also formed with a slope-shaped protrusion 111. Correspondingly, the right edge of the first guide slope 51 is provided with a slope-shaped notch 52 that cooperates with the slope-shaped protrusion 111.

[0022] The second guide post 7 has an auxiliary inclined surface 71 at both its upper and lower ends. The upper auxiliary inclined surface 71 is set with the left side lower than the right side and cooperates with the lower edge of the end of the first alignment block 5. The lower auxiliary inclined surface 71 is set with the left side higher than the right side.

[0023] It also includes a second alignment block 9 located to the right of the first-stage slider 1 and at least two second circular guide posts 10 that are obliquely interspersed in the second alignment block 9 and are arranged parallel to each other. The oblique direction of the second circular guide post 10 is matched with the oblique direction of the first guide post 2 so that the movement directions of the second alignment block 9 and the first-stage slider 1 are opposite to each other.

[0024] A first molding block 101 is formed on the right side of the first-stage slider 1 in the direction of the second alignment block 9. Correspondingly, a second molding block 91 that cooperates with the first molding block 101 is formed on the left side of the second alignment block 9 in the direction of the first-stage slider 1.

[0025] A first arc-shaped surface 102 is formed on the outer wall of the end of the first molding block 101. Correspondingly, a second arc-shaped surface 92 that cooperates with the first arc-shaped surface 102 is formed on the outer wall of the end of the second molding block 91.

[0026] The second arc forming surface 92 also has a stepped protrusion 93 formed in the direction of the first arc forming surface 102. Correspondingly, the first arc forming surface 102 has a stepped cavity 103 that cooperates with the stepped protrusion 93.

[0027] On the end face of the step protrusion 93, there is also an opening protrusion 94 in the direction of the step cavity 103. Correspondingly, an opening recess 94 that cooperates with the opening protrusion 94 is provided on the bottom surface of the step cavity 103.

[0028] The ends of the first alignment block 5 and the third-level slider 6 are respectively formed with a third arc forming surface 53 and a fourth arc forming surface 62 that cooperate with the second arc forming surface 92.

[0029] Working principle: The first-level slider 1 and the second alignment block 9 are both movably connected to the end face of the fixed module of the injection mold so that both have the function of lateral movement; then the end of the holding section 21 on each first square guide post 2, the upper end of the first round guide post 4, and the upper end of the second round guide post 10 are all fixed to the moving module of the injection mold.

[0030] The drive module moves toward the fixed module to drive each first square guide post 2, first circular guide post 4, and second circular guide post 10 to move synchronously. Since the downward movement of each first square guide post 2 and second circular guide post 10 is synchronous, it will force the first-stage slider 1 and the second alignment block 9 to move relative to each other until the first arc forming surface 102 and the second arc forming surface 92 are separated by a certain distance. However, at this time, the first circular guide post 4 has not yet been inserted into the second-stage slider 3. The above process is the first-stage alignment stage.

[0031] As the moving module continues to move, the first circular guide post 4 is gradually inserted into the second-level slider 3, which in turn forces the second-level slider 3 to move toward the second alignment block 9, thereby driving the first alignment block 5 to move synchronously until the third arc forming surface 53 is also a certain distance away from the second arc forming surface 92. The above process is the second-level alignment stage. Since each first square guide post 2 has a vertically set holding section 21 formed at the upper end, the first-level slider 1 remains stationary.

[0032] Since the third-level slider 6 is movably connected to the top of the first-level slider 1 to enable vertical tilting movement, and since the bottom of the third-level slider 6 is movably connected to the top of the first alignment block 5 to enable horizontal tilting movement, when the first alignment block 5 moves toward the second alignment block 9, it will force the third-level slider 6 to also move toward the second alignment block 9 and gradually move downwards until the fourth arc forming surface 62 is also a certain distance away from the second arc forming surface 92. The above process is the third-level alignment stage.

[0033] When the first alignment block 5 moves toward the second alignment block 9, the lower edge of the end of the first alignment block 5 will be gradually forced to tilt downward by an auxiliary inclined surface 71 located at the upper end of the second guide post 7, so that the lower end of the second guide post 7 is inserted into the cavity provided on the fixed module. Since the pin 8 is horizontally and movably inserted into the right side of the first-stage slider 1 to have the function of horizontal translation, and since the left end of the pin 8 is movably connected to the right outer wall of the second guide post 7 to have the function of vertical tilting, the downward movement of the second guide post 7 will force the pin 8 to move toward the second alignment block 9 until the right end of the pin 8 is attached to the second arc forming surface 92. The above process is the fourth-stage alignment process.

[0034] Subsequently, the molten material enters the space between the moving module and the stationary module through the sprue located in the moving module to complete the injection molding process. After cooling, it forms the lower trim panel of the car (existing technology).

[0035] During core pulling, the moving module first drives the first circular guide post 4 to move in the opposite direction, and then similarly drives the second-level slider 3 to move in the opposite direction, thereby moving the third arc forming surface 53 on the first alignment block 5 away from the second arc forming surface 92 on the second alignment block 9. This is the first stage of core pulling. The movement of the first alignment block 5 will also drive the third-level slider 6 to move in the opposite direction so that the fourth arc forming surface 62 is away from the second arc forming surface 92. This is the second stage of core pulling. During the above process, the first-level slider 1 is held in place by the holding section 21 on each first square guide post 2. Without moving, each first guide post 2 will force the first-stage slider 1 to move in the opposite direction, thereby causing the first arc forming surface 102 to move away from the second arc forming surface 92. This is the third stage of core pulling. The movement of the first-stage slider 1 will cause the second guide post 7 to move synchronously, so that an auxiliary inclined surface 71 located at the lower end of the second guide post 7 slides along the corresponding inner wall of the cavity on the fixed module, thereby causing the second guide post 7 to gradually move upward and reset. Similarly, the right end of the pin 8 will also gradually move away from the second arc forming surface 92. This is the fourth stage of core pulling.

[0036] This invention achieves four-stage core-pulling action using only mechanical drive. Even without the addition of hydraulic cylinders, it can smoothly complete the molding steps with relatively complex lateral structures, thereby reducing the mold manufacturing cost and simplifying the installation and debugging process. In addition, it can better avoid interference between the sliders at each stage, thus reducing the difficulty of processing and assembly.

[0037] 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 core-pulling mechanism for an injection mold of an automotive lower trim panel, comprising a primary slide block and at least two first guide pillars obliquely intersecting and parallel to each other within the primary slide block, characterized in that: Each of the first guide posts has a vertically arranged retaining section formed at its upper end; It also includes a secondary slider that is movably connected to the top of the primary slider to have a lateral translation function, and a first circular guide post that is obliquely inserted into the secondary slider. The movement direction of the secondary slider is parallel to the movement direction of the primary slider. It also includes a first alignment block fixed on the outer right side of the secondary slider and a tertiary slider movably connected to the top of the primary slider to have the function of vertical tilting and is located above the first alignment block. The bottom of the tertiary slider is movably connected to the top of the first alignment block to have the function of horizontal tilting. It also includes a second guide post that is obliquely inserted into the first slider and located below the first alignment block, and a pin that is laterally and movably inserted into the right side of the first slider to have a lateral translation function. The length of the second square guide post is greater than the thickness of the first-stage slider so that the upper or lower end of the second square guide post extends above the top or below the bottom of the first-stage slider, respectively. The upper end of the second square guide post cooperates with the bottom outer wall of the first alignment block. The pin moves in a direction parallel to the first-stage slider. The left end of the pin is movably connected to the right outer wall of the second guide post to enable it to tilt up and down.

2. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 1, characterized in that, The top of the first alignment block has a first guide slope, and correspondingly, the bottom of the three-stage slider has a second guide slope that cooperates with the first guide slope, and the second guide slope slides against the first guide slope.

3. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 2, characterized in that, A limiting block is also embedded on the right edge of the second guide slope. The bottom outer wall of the limiting block is flush with the second guide slope. A sloping protrusion is also formed on the right edge of the bottom outer wall of the limiting block. Correspondingly, a sloping notch that cooperates with the sloping protrusion is opened on the right edge of the first guide slope.

4. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 1, characterized in that, The second guide post has an auxiliary inclined surface at both its upper and lower ends. The upper auxiliary inclined surface is set with the left side lower than the right side and cooperates with the lower edge of the end of the first alignment block. The lower auxiliary inclined surface is set with the left side higher than the right side.

5. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 1, characterized in that, It also includes a second alignment block located to the right of the first-stage slider and at least two second circular guide posts that are inclined and interspersed in the second alignment block and are arranged parallel to each other. The inclination direction of the second circular guide post is matched with the inclination direction of the first guide post so that the movement directions of the second alignment block and the first-stage slider are opposite to each other.

6. The alignment and core-pulling mechanism for an automotive lower trim panel injection mold according to claim 5, characterized in that, A first molding block is formed on the right side of the first-stage slider towards the second alignment block, and correspondingly, a second molding block is formed on the left side of the second alignment block towards the first-stage slider, which cooperates with the first molding block.

7. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 6, characterized in that, A first arc-shaped surface is formed on the outer wall of the end of the first molding block, and correspondingly, a second arc-shaped surface is formed on the outer wall of the end of the second molding block that cooperates with the first arc-shaped surface.

8. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 7, characterized in that, The second arc-shaped surface is also formed with stepped protrusions in the direction of the first arc-shaped surface. Correspondingly, the first arc-shaped surface is provided with stepped concave cavities that cooperate with the stepped protrusions.

9. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 8, characterized in that, On the end face of the stepped protrusion, there is also an opening protrusion forming in the direction of the stepped cavity. Correspondingly, an opening recessed cavity that cooperates with the opening protrusion is formed on the bottom surface of the stepped cavity.

10. The alignment and core-pulling mechanism for an injection mold of an automotive lower trim panel according to claim 7, characterized in that, The ends of the first alignment block and the ends of the three-stage slider are respectively formed with a third arc forming surface and a fourth arc forming surface that cooperate with the second arc forming surface.

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