Automobile rearview mirror worm and gear multi-cavity injection mold with rotary core-pulling mechanism

Abstract

The utility model provides an automobile rearview mirror worm and gear multi-cavity injection mold with a rotary core-pulling mechanism, and belongs to the technical field of molds. The turbine center hole forming die comprises an upper die plate and a lower die plate, four forming cavities are formed between the upper die plate and the lower die plate, an upper mounting plate and a lower mounting plate are arranged on the lower side of the lower die plate, and four turbine center hole forming screws inserted into the four forming cavities respectively are arranged on the upper die plate in a sliding fit mode. Four turbine products can be formed through one-time injection molding of the four forming cavities, a turbine center hole forming screw rod can form a center hole with an internal thread in the center of a turbine, after the products are formed, the rotary core pulling mechanism can drive the four turbine products in the forming cavities to rotate, and when the four turbine products rotate, under the action of a first circumferential limiting structure, the four turbine products are driven to rotate by the rotary core pulling mechanism. When a turbine product rotates, the turbine center hole forming screw rod can move upwards, and therefore core pulling of the turbine center hole forming screw rod is achieved under the condition that internal threads in a turbine center hole are not damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a multi-cavity injection mold for a worm gear of an automobile rearview mirror with a rotary core-pulling mechanism. Background Art

[0002] Plastic worm gears are generally produced by injection molding, but the molds in the prior art cannot directly form internal threads in the center hole of the worm gear. After the worm gear is injection molded, it is necessary to use a tapping device to tap the threads at the center of the worm gear. The production process of the worm gear is relatively complicated and the production efficiency is low.

[0003] For example, a Chinese patent discloses a worm gear injection mold [application number: 202120648543.X], which includes an upper mold assembly and a lower mold assembly, the upper mold assembly includes an upper mounting plate, an upper connecting plate and an upper mold plate arranged in sequence from top to bottom, the upper mold plate is provided with an upper core, the lower mold assembly includes a lower mold plate, a mold foot and a lower bottom plate arranged in sequence from top to bottom, the lower mold plate is attached to the upper mold plate, a lower core is provided on the lower mold plate, at least one mold body is provided on the lower core, a cavity is formed between the upper core, the mold body and the lower core, a pouring pipe is provided at the center of the upper mounting plate, the mold body can slide up and down and rotate circumferentially on the lower core, and also includes a push rod, the end of the push rod extends into the cavity, when the push rod lifts the formed worm gear, the push rod can drive the mold body to move upward and rotate circumferentially, when the upper core presses the mold body, the upper core can drive the mold body to move downward and rotate to reset. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a multi-cavity injection mold for a worm gear of an automobile rearview mirror with a rotary core-pulling mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-cavity injection mold for a worm gear of an automobile rearview mirror with a rotary core-pulling mechanism comprises an upper mold plate and a lower mold plate, four molding cavities are arranged between the upper mold plate and the lower mold plate, an upper mounting plate and a lower mounting plate are arranged on the lower side of the lower mold plate, four worm gear center hole molding screws are slidably fitted on the upper mold plate and are respectively inserted into the four molding cavities, the worm gear center hole molding screw and the upper mold plate are connected by a No. 1 circumferential limiting structure, and a rotary core-pulling mechanism capable of driving the four worm gear center hole molding screws to move up and down is arranged on the upper mounting plate and the lower mounting plate.

[0007] In the above-mentioned automobile rearview mirror worm gear multi-cavity injection mold with a rotating core-pulling mechanism, the rotating core-pulling mechanism includes four worm gear lower end surface forming rods with a second circumferential limiting structure at the top and a multi-rod driving assembly that can drive the four worm gear lower end surface forming rods to rotate synchronously.

[0008] In the above-mentioned automotive rearview mirror worm gear multi-cavity injection mold with a rotating core-pulling mechanism, the multi-rod drive assembly includes a power component and a power output component arranged on an upper mounting plate and a transmission component arranged on a lower mounting plate, and the power component is connected to the power output component through the transmission component.

[0009] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotating core-pulling mechanism, the power output component includes a central transmission gear arranged on the upper side of the upper mounting plate, and four power output gears distributed in a rectangular shape are meshed on the central transmission gear, and four worm gear lower end surface forming rods are respectively fixed at the center of the upper end surfaces of the four power output gears.

[0010] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotary core-pulling mechanism, the power component includes a rotary driver fixedly arranged on the upper side of the upper mounting plate.

[0011] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotating core-pulling mechanism, the transmission component includes a No. 1 transmission gear fixedly connected to the output shaft of the rotating driver, the No. 1 transmission gear is arranged on the lower side of the upper mounting plate, and the lower mounting plate is also rotatably connected to a No. 2 transmission gear coaxially arranged with the center transmission gear, and the lower mounting plate is also rotatably connected to a No. 3 transmission gear whose two ends are respectively meshed with the No. 1 transmission gear and the No. 2 transmission gear.

[0012] In the above-mentioned multi-cavity injection mold of worm gear for automobile rearview mirror with a rotary core-pulling mechanism, the rotary drive comprises a motor.

[0013] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotating core-pulling mechanism, a power output component mounting groove is recessed inwardly on the upper mounting plate, and a transmission gap for installing the transmission component is provided between the upper mounting plate and the lower mounting plate.

[0014] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotating core-pulling mechanism, the No. 1 circumferential limiting structure includes limiting planes symmetrically arranged on both sides of the top of the worm gear center hole forming screw, and the groove body on the upper mold plate for installing the worm gear center hole forming screw has a protrusion that is against the limiting plane.

[0015] In the above-mentioned multi-cavity injection mold of the worm gear of the automobile rearview mirror with a rotating core-pulling mechanism, the No. 2 circumferential limiting structure includes a limiting block protruding from the top of the molding rod on the lower end face of the worm gear, and the cross-section of the limiting block is T-shaped and the two ends are flush with the molding rod on the lower end face of the worm gear.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. Four molding cavities can injection mold four worm gear products at one time. The worm gear center hole molding screw can mold a center hole with an internal thread at the center of the worm gear. After the product is molded, the rotating core-pulling mechanism can drive the four worm gear products in the molding cavity to rotate. When the four worm gear products rotate, under the action of the No. 1 circumferential limiting structure, when the worm gear products rotate, the worm gear center hole molding screw can move upward, thereby realizing the core pulling of the worm gear center hole molding screw without damaging the internal thread in the worm gear center hole.

[0018] 2. The rotary driver can drive the No. 1 transmission gear to rotate, the rotation of the No. 1 transmission gear can drive the No. 3 transmission gear to rotate, the rotation of the No. 3 transmission gear can drive the No. 2 transmission gear to rotate, the rotation of the No. 2 transmission gear can drive the center transmission gear to rotate, the rotation of the center transmission gear can drive the four power output gears to rotate, and the rotation of the power output gear can drive the lower end surface forming rod of the worm gear to rotate.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 is a schematic diagram of the structure of a multi-rod drive assembly;

[0022] Figure 3 It is a partial structural schematic diagram of the utility model;

[0023] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0024] In the figure, upper template 1, lower template 2, upper mounting plate 3, lower mounting plate 4, worm gear center hole forming screw 5, rotary core pulling mechanism 6, worm gear lower end surface forming rod 7, center transmission gear 8, power output gear 9, rotary driver 10, No. 1 transmission gear 11, No. 2 transmission gear 12, No. 3 transmission gear 13, power output component mounting groove 14, transmission gap 15, limit plane 16, limit block 17. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 4As shown, a multi-cavity injection mold for a worm gear of an automobile rearview mirror with a rotary core-pulling mechanism comprises an upper mold plate 1 and a lower mold plate 2, four molding cavities are arranged between the upper mold plate 1 and the lower mold plate 2, an upper mounting plate 3 and a lower mounting plate 4 are arranged on the lower side of the lower mold plate 2, four worm gear center hole molding screws 5 are slidably fitted on the upper mold plate 1 and inserted into the four molding cavities respectively, the worm gear center hole molding screw 5 and the upper mold plate 1 are connected by a No. 1 circumferential limiting structure, and a rotary core-pulling mechanism 6 which can drive the four worm gear center hole molding screws 5 to move up and down is arranged on the upper mounting plate 3 and the lower mounting plate 4.

[0026] In the utility model, four molding cavities can injection mold four worm gear products at one time, and the worm gear center hole molding screw 5 can mold a center hole with an internal thread at the center of the worm gear. After the product is molded, the rotating core-pulling mechanism 6 can drive the four worm gear products in the molding cavity to rotate. When the four worm gear products rotate, under the action of the No. 1 circumferential limiting structure, when the worm gear product rotates, the worm gear center hole molding screw can move upward, thereby realizing the core pulling of the worm gear center hole molding screw without damaging the internal thread in the worm gear center hole.

[0027] Specifically, the rotary core-pulling mechanism 6 includes four worm gear lower end surface forming rods 7 with a second circumferential limit structure at the top and a multi-rod driving assembly that can drive the four worm gear lower end surface forming rods 7 to rotate synchronously. The multi-rod driving assembly can simultaneously drive the four worm gear lower end surface forming rods 7 to rotate synchronously. Under the action of the second circumferential limit structure, the worm gear product can rotate synchronously with the worm gear lower end surface forming rod 7, thereby achieving the purpose of core-pulling the worm gear center hole forming screw.

[0028] Specifically, combined with Figure 2 and Figure 3As shown, the multi-rod drive assembly includes a power component and a power output component arranged on the upper mounting plate 3 and a transmission component arranged on the lower mounting plate 4, the power component is connected to the power output component through the transmission component, the power output component includes a central transmission gear 8 arranged on the upper side of the upper mounting plate 3, four rectangularly distributed power output gears 9 are meshed on the central transmission gear 8, four worm gear lower end surface forming rods 7 are respectively fixed at the upper end surface centers of the four power output gears 9, the power component includes a rotary driver 10 fixedly arranged on the upper side of the upper mounting plate 3, the transmission component includes a No. 1 transmission gear 11 fixedly connected to the output shaft of the rotary driver 10, the No. 1 transmission gear 11 is arranged on the lower side of the upper mounting plate 3, the lower mounting plate 4 is also rotatably connected to a No. 2 transmission gear 12 coaxially arranged with the central transmission gear 8, and the lower mounting plate 4 is also rotatably connected to a No. 3 transmission gear 13 whose two ends are respectively meshed with the No. 1 transmission gear 11 and the No. 2 transmission gear 12. The rotary driver 10 can drive the No. 1 transmission gear 11 to rotate, the rotation of the No. 1 transmission gear can drive the No. 3 transmission gear to rotate, the rotation of the No. 3 transmission gear can drive the No. 2 transmission gear to rotate, the rotation of the No. 2 transmission gear can drive the center transmission gear to rotate, the rotation of the center transmission gear can drive the four power output gears to rotate, and the rotation of the power output gear can drive the worm gear lower end surface forming rod 7 to rotate.

[0029] Specifically, the rotary drive 10 includes a motor.

[0030] Specifically, a power output component mounting groove 14 is recessed inwardly on the upper mounting plate 3, and a transmission gap 15 for mounting a transmission component is provided between the upper mounting plate 3 and the lower mounting plate 4. The power output component is arranged in the power output component mounting groove 14, and the transmission component is arranged in the transmission gap 15.

[0031] Specifically, combined with Figure 3 As shown, the first circumferential limiting structure includes limiting planes 16 symmetrically arranged on both sides of the top of the worm gear center hole forming screw 5, and the groove body on the upper template 1 for mounting the worm gear center hole forming screw 5 has a protrusion that abuts against the limiting plane 16. The limiting planes 16 on both sides of the top of the worm gear center hole forming screw 5 cooperate with the protrusion in the groove body to circumferentially limit the worm gear center hole forming screw 5, so that the worm gear center hole forming screw 5 can move up and down while not rotating circumferentially.

[0032] Specifically, combined with Figure 3As shown, the second circumferential limiting structure includes a limiting block 17 protruding from the top of the worm gear lower end surface forming rod 7, the cross section of the limiting block 17 is T-shaped and the two ends are flush with the worm gear lower end surface forming rod 7. The limiting block 17 can be inserted into the forming cavity, which can form a limiting groove at the bottom of the worm gear product, and can also drive the worm gear to rotate when the worm gear lower end surface forming rod 7 rotates, thereby achieving the purpose of core pulling of the worm gear center hole forming screw.

[0033] The working principle of the utility model is as follows: four molding cavities can be used for injection molding four worm gear products at one time, and the worm gear center hole molding screw 5 can form a center hole with an internal thread at the center of the worm gear. After the product is molded, the rotating core-pulling mechanism 6 can drive the four worm gear products in the molding cavity to rotate. When the four worm gear products rotate, under the action of the No. 1 circumferential limiting structure, when the worm gear products rotate, the worm gear center hole molding screw can move upward, thereby realizing the core-pulling of the worm gear center hole molding screw without damaging the internal thread in the worm gear center hole.

[0034] The multi-rod driving assembly can simultaneously drive the four worm gear lower end surface forming rods 7 to rotate synchronously. Under the action of the No. 2 circumferential limiting structure, the worm gear product can rotate synchronously with the worm gear lower end surface forming rod 7, so as to achieve the purpose of core pulling of the worm gear center hole forming screw. The rotary driver 10 can drive the No. 1 transmission gear 11 to rotate. The rotation of the No. 1 transmission gear can drive the No. 3 transmission gear to rotate. The rotation of the No. 3 transmission gear can drive the No. 2 transmission gear to rotate. The rotation of the No. 2 transmission gear can drive the center transmission gear to rotate. The rotation of the center transmission gear can drive the four power output gears to rotate. The rotation of the power output gear can drive the worm gear lower end surface forming rod 7 to rotate. The power output component is arranged in the power output component installation groove 14, and the transmission component is arranged in the transmission gap 15.

[0035] The limiting planes 16 on both sides of the top of the worm gear center hole forming screw 5 cooperate with the protrusions in the groove body to circumferentially limit the worm gear center hole forming screw 5, so that the worm gear center hole forming screw 5 can move up and down but cannot rotate circumferentially. The limiting block 17 can be inserted into the forming cavity, which can form a limiting groove at the bottom of the worm gear product, and can also drive the worm gear to rotate when the forming rod 7 on the lower end face of the worm gear rotates, thereby achieving the purpose of core pulling of the worm gear center hole forming screw.

[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0037] Although this article uses the upper template 1, lower template 2, upper mounting plate 3, lower mounting plate 4, worm gear center hole forming screw 5, rotary core pulling mechanism 6, worm gear lower end surface forming rod 7, center transmission gear 8, power output gear 9, rotary driver 10, No. 1 transmission gear 11, No. 2 transmission gear 12, No. 3 transmission gear 13, power output component mounting groove 14, transmission gap 15, limit plane 16, limit block 17, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A multi-cavity injection mold for a worm gear of an automobile rearview mirror having a rotating core-pulling mechanism, comprising an upper mold plate (1) and a lower mold plate (2), wherein four molding cavities are arranged between the upper mold plate (1) and the lower mold plate (2), and an upper mounting plate (3) and a lower mounting plate (4) are arranged on the lower side of the lower mold plate (2). It is characterized in that The upper mold plate (1) is slidably fitted with four worm gear center hole forming screws (5) which are respectively inserted into four forming cavities; the worm gear center hole forming screws (5) and the upper mold plate (1) are connected via a circumferential limiting structure; the upper mounting plate (3) and the lower mounting plate (4) are provided with a rotating core-pulling mechanism (6) which can drive the four worm gear center hole forming screws (5) to move up and down.

2. The multi-cavity injection mold for worm gear of automobile rearview mirror with a rotary core-pulling mechanism according to claim 1, It is characterized in that The rotary core-pulling mechanism (6) comprises four worm gear lower end surface forming rods (7) with a second circumferential limiting structure at the top end and a multi-rod driving assembly capable of driving the four worm gear lower end surface forming rods (7) to rotate synchronously.

3. The multi-cavity injection mold for the worm gear of the automobile rearview mirror with a rotary core-pulling mechanism according to claim 2, It is characterized in that The multi-rod driving assembly comprises a power component and a power output component arranged on an upper mounting plate (3) and a transmission component arranged on a lower mounting plate (4), wherein the power component is connected to the power output component via the transmission component.

4. The multi-cavity injection mold for the worm gear of the automobile rearview mirror with a rotary core-pulling mechanism according to claim 3, It is characterized in that The power output component comprises a central transmission gear (8) arranged on the upper side of the upper mounting plate (3), the central transmission gear (8) is meshed with four rectangularly distributed power output gears (9), and four worm gear lower end surface forming rods (7) are respectively fixed at the centers of the upper end surfaces of the four power output gears (9).

5. The multi-cavity injection mold for the worm gear of the automobile rearview mirror with a rotary core-pulling mechanism according to claim 4, It is characterized in that The power component comprises a rotary driver (10) fixedly arranged on the upper side of the upper mounting plate (3).

6. The multi-cavity injection mold for worm gear of automobile rearview mirror with rotary core-pulling mechanism according to claim 5, It is characterized in that The transmission component comprises a first transmission gear (11) fixedly connected to the output shaft of the rotary driver (10); the first transmission gear (11) is arranged on the lower side of the upper mounting plate (3); the lower mounting plate (4) is also rotatably connected to a second transmission gear (12) coaxially arranged with the central transmission gear (8); the lower mounting plate (4) is also rotatably connected to a third transmission gear (13) whose two ends are respectively meshed with the first transmission gear (11) and the second transmission gear (12).

7. The multi-cavity injection mold for worm gear of automobile rearview mirror with rotary core-pulling mechanism according to claim 5, It is characterized in that The rotary drive (10) comprises a motor.

8. The multi-cavity injection mold for worm gear of automobile rearview mirror with a rotary core-pulling mechanism according to claim 6, It is characterized in that The upper mounting plate (3) is provided with a power output component mounting groove (14) recessed inwardly, and a transmission gap (15) for mounting a transmission component is provided between the upper mounting plate (3) and the lower mounting plate (4).

9. The multi-cavity injection mold for worm gear of automobile rearview mirror with a rotary core-pulling mechanism according to claim 1, It is characterized in that The first circumferential limiting structure comprises limiting planes (16) symmetrically arranged on both sides of the top of the worm gear center hole forming screw (5), and the groove body on the upper template (1) for installing the worm gear center hole forming screw (5) has a protrusion that abuts against the limiting plane (16).

10. The multi-cavity injection mold for worm gear of automobile rearview mirror with a rotary core-pulling mechanism according to claim 2, It is characterized in that The second circumferential limiting structure comprises a limiting block (17) protruding from the top of the worm gear lower end surface forming rod (7), the limiting block (17) has a T-shaped cross section and both ends are flush with the worm gear lower end surface forming rod (7).

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