A worm injection mold

Abstract

The utility model discloses a worm injection mold, including fixed mould and movable mould, and the fixed mould is equipped with the loading plate, four stripping gear on it rotatably mounted, still be equipped with the die pin body with stripping gear transmission connection, the die pin body has the worm cavity, and the movable mould is fixed with the die pin cover, and the gear of drive gear structure is engaged with two stripping gears, and the other two are driven with third transmission gear, four stripping gears do not interfere with each other, and two two about horizontal longitudinal axis symmetrical arrangement, and the second transmission gear synchronous drive two stripping gears, and each drive a third transmission gear, reduce transmission loss and wear and tear, when the second transmission gear rotates clockwise, stripping gear counterclockwise rotation, drive third transmission gear rotates clockwise, and the symmetrical arrangement of gear makes the die pin body distribute evenly, and the layout is compact, improves the structural strength, realizes one driving gear synchronous drive multiple die pin body same direction rotation, can simultaneously form multiple worm cavity, promotes production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of worm gear injection mold technology, and in particular to a worm gear injection mold. Background Technology

[0002] In application number 202022981475.7, it is pointed out that the prior art usually adopts a hard demolding method, that is, the molded part is directly ejected by ejector pins. This method is prone to damage to the worm gear threads and the product qualification rate is low. At the same time, the residual material generated in the previous molding process is easy to accumulate in the cavity, affecting the quality of subsequent injection molded products. The application proposes in the beneficial effects that when the moving mold and the fixed mold are closed, the raw material is injected into the spiral cavity to form a worm gear. The molding cavity is provided with a spiral groove that matches the worm gear threads. During demolding, the motor drives the third gear to rotate, which drives the first gear to rotate through multiple second gears, thereby rotating the mold core body. The lifting component rises and presses against the worm gear to prevent the worm gear from rotating with the mold core, thereby realizing rotational demolding, reducing damage to the worm gear, and improving the yield rate. However, in conjunction with the instruction manual and its accompanying drawings (especially the accompanying drawings) Figure 3 As can be seen from the multiple second gears mentioned in the instruction manual, the third gear drives the first gear through multiple second gears arranged in a straight line, thereby causing the mold core to rotate. This straight-line gear transmission method has the following problems: First, the force needs to be transmitted through multiple stages, and each meshing stage will generate friction loss (including tooth surface friction and bearing resistance), reducing transmission efficiency; second, from the attached... Figure 3 As can be seen, the last second gear drives the first gear to rotate the mold core, but the adjacent second gear rotates in the opposite direction and cannot work with the first gear to achieve the same rotation of the mold core. Only by skipping one gear can the rotation be consistent, resulting in a complex transmission relationship and low efficiency. In addition, the linear arrangement has poor space utilization, which will force the layout of the fixed mold and the moving mold to be adjusted accordingly, affecting the overall structural strength of the mold. At the same time, this arrangement makes it difficult to arrange multiple first gears in a limited space, limiting the possibility of realizing a multi-cavity mold and reducing production efficiency. Therefore, the gear layout in this application is unreasonable. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] To address the aforementioned problems, this utility model provides the following technical solution: A worm gear injection mold includes a fixed mold and a moving mold. The fixed mold has a carrier plate on which a demolding gear is rotatably mounted. The fixed mold also has a mold core body, which is connected to the demolding gears and has a worm-shaped cavity inside. A mold core cover is fixedly installed on the moving mold. The demolding gears mesh with gears of a drive gear structure. The mold mold is characterized in that: there are four demolding gears, two of which are meshed with gears of the drive gear structure, and the other two are driven by a third transmission gear. The four demolding gears do not interfere with each other and are arranged in a pairwise symmetrical manner about the horizontal axis and the pairwise symmetrical manner about the vertical axis.

[0005] Preferably, the intersection point of the vertical axis and the horizontal axis is located at the center of the fixed mold and the moving mold.

[0006] Preferably, the drive gear structure includes a motor, a drive gear, a first transmission gear, and a second transmission gear, with the motor mounted on the fixed mold via a bracket.

[0007] Preferably, the motor output shaft is provided with a drive gear, which meshes with a first transmission gear. The first transmission gear is mounted on a bracket and meshes with a second transmission gear, which is rotatably mounted on a carrier plate.

[0008] Preferably, the second transmission gear meshes with two demolding gears simultaneously, and one demolding gear and the other demolding gear are connected by a third transmission gear.

[0009] Preferably, the two demolding gears meshing with the second transmission gear and the two demolding gears driven by the third transmission gear are arranged symmetrically along the longitudinal axis, and the number of the third transmission gears is two, and they are arranged symmetrically along the longitudinal axis.

[0010] Preferably, the demolding gear is fixed to the outer surface near the top of the mold core, the mold core is rotatably mounted on the fixed mold, and an ejector pin is inserted into the bottom of the mold core and mounted on the fixed mold. The beneficial effects of this utility model are: the second transmission gear simultaneously drives two demolding gears, and each demolding gear in turn drives a third transmission gear, which reduces transmission loss and wear in the entire structure; when the second transmission gear rotates clockwise, the demolding gear rotates counterclockwise, which in turn drives the third transmission gear to rotate clockwise; all gears are symmetrically arranged, so that the demolding gears and mold cores are evenly distributed in the center of the mold, and the layout is more compact and reasonable, which not only improves the structural strength, but also realizes that one active gear synchronously drives multiple mold cores to rotate in the same direction, which can simultaneously form multiple volute cavities and improve production efficiency. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a perspective view of the entire embodiment.

[0012] Figure 2 This is an example. Figure 1 A partial sectional view.

[0013] Figure 3 This is an example. Figure 1 Top view.

[0014] Figure 4 This is an example. Figure 1 Full sectional view.

[0015] Figure 5 This is an example. Figure 2 A perspective view of the middle demolding gear 404 and the mold core 501.

[0016] Figure 6 This is an example. Figure 5 A sectional view.

[0017] In the diagram: fixed mold 100, ejector pin 101, moving mold 200, carrier plate 300; The drive gear structure 400, motor 401, drive gear 401a, first transmission gear 402, second transmission gear 403, demolding gear 404, and third transmission gear 405 are included. Mold core cover 500, mold core body 501, volute cavity 502, longitudinal axis 600, transverse axis 601. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Example Reference Figures 1 to 6 This embodiment of the present invention provides a worm gear injection mold, including a fixed mold 100 and a moving mold 200. The fixed mold 100 is provided with a carrier plate 300, and a demolding gear 404 is rotatably mounted on the carrier plate 300. The fixed mold 100 is also provided with a mold core body 501, which is connected to the demolding gear 404 in a transmission manner. The mold core body 501 has a worm-shaped cavity 502 inside. A mold core cover 500 is fixedly provided on the moving mold 200. The demolding gear 404 meshes with the gear of the drive gear structure 400. There are four demolding gears 404. The gear of the drive gear structure 400 meshes with two of the demolding gears 404. The other two demolding gears 404 are transmitted to the aforementioned two demolding gears 404 through a third transmission gear 405. The four demolding gears 404 do not interfere with each other. Their arrangement is symmetrical about the horizontal axis 601 and about the vertical axis 600 in pairs.

[0022] Specifically, similar in structure to application number 202022981475.7, the fixed mold 100 and the moving mold 200 are provided. The fixed mold 100 is provided with a carrier plate 300, on which a demolding gear 404 is rotatably mounted. The fixed mold 100 is also provided with a mold core body 501, which is connected to the demolding gear 404. The mold core body 501 has a volute cavity 502 inside. The moving mold 200 is fixedly provided with a mold core cover 500. The demolding gear 404 meshes with the gear of the drive gear structure 400. After the upper and lower molds are separated, the mold core cover 500 on the moving mold 200 and the fixed mold 100 are connected. The mold core 501 separates from the mold plate. Gears cause the mold core 501 to rotate, engaging with the ejection structure of the mold to eject the worm gear product. Unlike the previous method, there are four ejection gears 404. The gears of the drive gear structure 400 mesh with two of the ejection gears 404, while the other two are driven by a third transmission gear 405. The four ejection gears 404 do not interfere with each other and are arranged symmetrically about the horizontal axis 601 and about the vertical axis 600. First, the second transmission gear 403 meshes synchronously with two of the ejection gears 404. The two demolding gears 404 are respectively engaged by a third transmission gear 405. This gear transmission method is simpler than the gear transmission method in application number 202022981475.7, thus reducing transmission loss and gear wear. If the second transmission gear 403 rotates clockwise, the two demolding gears 404 meshing with it will rotate counterclockwise, followed by the third transmission gear 405 rotating clockwise, and then the subsequent two demolding gears 404 rotating counterclockwise. Furthermore, their arrangement is symmetrical about the horizontal axis 601 and about the vertical axis 600, which allows for... The demolding gear 404 and the mold core 501 are arranged along the center of the fixed mold 100 to ensure the strength of the mold structure and to ensure that the mold core 501 can rotate in the same direction under the drive of a second transmission gear 403, thereby realizing multiple worm cavities 502 in one mold and improving its production efficiency. Unlike the gear layout in application number 202022981475.7, the second transmission gear 403 in this application encroaches on the mold itself, while the gear layout in application number 202022981475.7 encroaches on the mold in the horizontal or vertical direction, which has a great impact on the mold structure.

[0023] For example, the interaction point of the vertical axis 600 and the horizontal axis 601 is located at the center of the fixed mold 100 and the moving mold 200. The purpose is to make the demolding gear 404 and the matching mold core 501 and worm cavity 502 more inclined to the center of the mold body, so as to ensure the structural strength of the mold itself.

[0024] For example, the drive gear structure 400 includes a motor 401, a drive gear 401a, a first transmission gear 402, and a second transmission gear 403. The motor 401 is mounted on the fixed mold 100 via a bracket. The drive gear 401a is mounted on the output shaft of the motor 401. The drive gear 401a meshes with the first transmission gear 402, which is mounted on the bracket. Figures 2-4 The drive gear structure 400 is determined according to the actual situation and is not limited to this embodiment. In this embodiment, the first transmission gear 402 meshes with the second transmission gear 403. The second transmission gear 403 is rotatably mounted on the carrier plate 300. The carrier plate 300 is used to mount the second transmission gear 403, the demolding gear 404, and the third transmission gear 405. The second transmission gear 403 meshes with two demolding gears 404 at the same time. One demolding gear 404 and the other demolding gear 404 are connected by the third transmission gear 405. The two demolding gears 404 meshing with the second transmission gear 403 and the two demolding gears 404 driven by the third transmission gear 405 are symmetrically arranged about the longitudinal axis 600. There are two third transmission gears 405, which are also symmetrically arranged about the longitudinal axis 600. In this embodiment, the demolding principle is as follows: The motor 401 drives the drive gear 401a to rotate, causing the first transmission gear 402 and the second transmission gear 403 to rotate, thereby causing the demolding gear 404 to rotate. During the rotation of the demolding gear 404, the mold core 501 rotates on the mold core 501. The worm gear product formed inside the mold core 501 interacts with the thread of the worm cavity 502 of the mold core 501, forcing the worm gear product to rotate upwards and completely disengage from the thread of the worm cavity 502. Then, the worm gear product is ejected from the bottom of the fixed mold 100 by the ejector pin 101 of the ejector pin structure at the bottom of the fixed mold 100, thus completing the demolding process of the worm gear product.

[0025] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A worm gear injection mold, comprising a fixed mold (100) and a moving mold (200), wherein the fixed mold (100) is provided with a carrier plate (300), a demolding gear (404) is rotatably mounted on the carrier plate (300), and a mold core body (501) is also provided on the fixed mold (100), the mold core body (501) being drivenly connected to the demolding gear (404), and the mold core body (501) having a worm-shaped cavity (502) inside; a mold core cover (500) is fixedly provided on the moving mold (200), and the demolding gear (404) meshes with a gear of a drive gear structure (400); characterized in that: The number of the demolding gears (404) is four. The gear of the drive gear structure (400) meshes with two of the demolding gears (404), and the other two demolding gears (404) are driven by the third transmission gear (405) to achieve transmission with the aforementioned two demolding gears (404). The four demolding gears (404) do not interfere with each other. Their arrangement is symmetrical about the horizontal axis (601) and about the vertical axis (600) in pairs.

2. The worm gear injection mold as described in claim 1, characterized in that: The intersection point of the vertical axis (600) and the horizontal axis (601) is located at the center of the fixed mold (100) and the moving mold (200).

3. The worm gear injection mold as described in claim 1, characterized in that: The drive gear structure (400) includes a motor (401), a drive gear (401a), a first transmission gear (402), and a second transmission gear (403). The motor (401) is mounted on the fixed mold (100) via a bracket.

4. The worm gear injection mold as described in claim 3, characterized in that: The output shaft of the motor (401) is provided with a drive gear (401a), which meshes with a first transmission gear (402). The first transmission gear (402) is mounted on a bracket. The first transmission gear (402) meshes with a second transmission gear (403), which is rotatably mounted on a carrier plate (300).

5. The worm gear injection mold as described in claim 4, characterized in that: The second transmission gear (403) meshes with two demolding gears (404) simultaneously, and one demolding gear (404) and the other demolding gear (404) are connected by a third transmission gear (405).

6. The worm gear injection mold as described in claim 5, characterized in that: The two demolding gears (404) meshing with the second transmission gear (403) and the two demolding gears (404) driven by the third transmission gear (405) are symmetrically arranged along the longitudinal axis (600). There are two third transmission gears (405), which are symmetrically arranged along the longitudinal axis (600).

7. The worm gear injection mold as described in claim 1, characterized in that: The demolding gear (404) is fixed on the outer surface near the top of the mold core (501). The mold core (501) is rotatably mounted on the fixed mold (100). The bottom of the mold core (501) is provided with an ejector pin (101), which is mounted on the fixed mold (100).

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