A turntable disengagement device for a two-color injection molding machine

Abstract

The invention discloses a turntable disengaging device for a two-color injection molding machine, which includes a moving template; a rotating shaft fixed to the center of the moving template; a turntable rotatably connected to the moving template through the rotating shaft; a plurality of threaded shafts evenly distributed on the outer edge of the moving template along the circumference of the turntable and fixedly connected to the moving template; a plurality of threaded caps, one end of which is threadedly connected to the corresponding threaded shaft and the other end of which is in contact with the side wall of the turntable; a servo motor detachably mounted on the outer side wall of the moving template and located on the side of the threaded cap; a gear fixed to the output end of the servo motor; a plurality of tooth grooves 1 located on the outer circumferential surface of the threaded cap and evenly distributed along the circumference of the threaded cap; a synchronous belt sleeved on the plurality of threaded caps and meshed with the tooth grooves 1; a plurality of tooth grooves 2 located on the outer circumferential surface of any threaded cap and located on the side of the synchronous belt and meshed with the gear. The beneficial effect of the invention is that it is beneficial to improve the balance of the turntable.

Description

Technical Field

[0001] The invention relates to the technical field related to injection molding machines, in particular to a turntable disengaging device for a double-color injection molding machine. Background Art

[0002] A two-color injection molding machine is a molding device that injects two different materials into the same mold, thereby realizing a product made of two materials.

[0003] During the injection molding process of the two-color injection molding machine, the center of the turntable is rotatably connected to the rear template through a rotating shaft. The mold is driven to rotate while the turntable rotates, and the turntable is assembled close to the rear template. Therefore, it is very important to control the gap between the turntable and the rear template. If the turntable is too close to the rear template when rotating, it is easy to cause friction with the rear template, which will affect the smoothness and stability of the turntable rotation and cause wear of parts. Therefore, it is usually necessary to control the back clearance of the turntable. In the prior art, the turntable is usually lifted up directly by an oil cylinder to control the gap between the turntable and the rear template when rotating. Although this operation solves the friction problem between the rear template, it is easy to cause the turntable to tilt and lose balance when the turntable is separated from the rear template, thereby causing collision and friction between the turntable and other components, which is also not conducive to extending the service life. Summary of the invention

[0004] The invention aims to overcome the disadvantage of the prior art that a turntable is easily out of balance after being ejected, and provides a turntable disengaging device for a two-color injection molding machine which is beneficial to improving the balance of the turntable.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A turntable disengaging device for a two-color injection molding machine, comprising: Mobile templates; A rotating shaft, fixed at the center of the movable template; A turntable, rotatably connected to the movable template via the rotating shaft; A plurality of threaded shafts are evenly distributed on the outer edge of the movable template along the circumference of the turntable and are fixedly connected to the movable template; A plurality of threaded caps, one end of which is threadedly connected to the corresponding threaded shaft, and the other end of which is in contact with the side wall of the rotating disk; A servo motor is detachably mounted on the outer side wall of the movable template and is located on the side of the threaded cap; A gear, fixed to the output end of the servo motor; A plurality of tooth grooves 1 are located on the outer circumferential surface of the threaded cap and are evenly distributed along the circumference of the threaded cap; A synchronous belt, which is sleeved on the plurality of threaded caps and meshes with one of the tooth grooves; Several tooth grooves are located on the outer circumference of any threaded cap and on the side of the synchronous belt, and mesh with the gear. The servo motor works, drives the gear to rotate, thereby driving one of the threaded caps to unscrew. At the same time, under the action of the synchronous belt, the remaining threaded caps also rotate synchronously and act on the turntable, thereby jointly ejecting the turntable outward, so that a gap of about 1mm is separated between the turntable and the moving template. Therefore, the present invention realizes synchronous unscrewing of several threaded caps under the action of the synchronous belt drive, avoiding the turntable from tilting during the disengagement process, and achieving the purpose of improving the balance of the turntable.

[0006] Preferably, a protrusion is provided on the movable template, one side of the protrusion is fixedly connected to the movable template, and the other side of the protrusion corresponding to the protrusion contacts the side wall of the turntable, and the protrusion is located in the synchronous belt. A male mold is installed on the turntable, and the protrusion contacts the side wall of the turntable, which is convenient for increasing the contact area between the movable template and the turntable when the mold is closed, ensuring the strength requirement when the mold is closed, and at the same time, it is beneficial to ensure the balance of the turntable, so that the male mold and the female mold are closely matched.

[0007] Preferably, one end of the threaded cap is provided with a threaded groove matching the threaded shaft, and the threaded cap is threadedly connected to the threaded shaft via the threaded groove.

[0008] Preferably, a spherical groove is provided on the other end of the threaded cap, and a ball is provided in the spherical groove, and the ball is connected to the spherical groove by rolling, and the threaded cap contacts the side wall of the turntable through the ball. The action of the clamping mechanism of the two-color injection molding machine is as follows: the clamping mechanism pushes the moving template so that the male mold and the female mold are tightly together; the mold is injected with glue; the clamping mechanism pulls the moving template in the opposite direction so that the male mold and the female mold are separated; the servo motor works to drive the gear to rotate, thereby driving one of the threaded caps to rotate out, and at the same time, under the action of the synchronous belt, the remaining threaded caps also rotate synchronously and act on the turntable through the ball, thereby jointly ejecting the turntable outward, so that the turntable and the moving template are separated by a gap of about 1mm; the turntable rotates 180°; the servo motor drives the threaded cap to rotate in the opposite direction to return to the initial position; the mold is closed again and the glue is injected. In the above process, when the turntable is rotating, the threaded cap acts on the turntable through the ball, which is conducive to ensuring the balance of the turntable during rotation on the one hand, and on the other hand, it is conducive to reducing wear and making the turntable rotate smoothly.

[0009] Preferably, the rounded angle of the spherical groove is greater than 180 degrees, which is beneficial for the ball to rotate in any direction and also for the positioning of the ball.

[0010] Preferably, the edge of the mobile template is provided with a plurality of mounting blocks, the mounting blocks are detachably fixedly connected to the mobile template, the plurality of mounting blocks are evenly distributed along the circumference of the turntable and are located on one side of the turntable, the other side corresponding to the turntable is a mounting surface, one end of the threaded shaft is fixedly connected to the mounting block, the threaded cap is threadedly connected to the other end of the threaded shaft, and the servo motor is detachably connected to one of the corresponding mounting blocks. The mounting surface of the turntable is used to install the male mold; the above design makes the installation and removal of the threaded shaft, threaded cap, synchronous belt and servo motor convenient and quick, thereby facilitating maintenance and replacement.

[0011] Preferably, an L-shaped groove is provided at the edge of the mounting surface, and a plurality of limit blocks are provided at the edge of the movable template. The limit blocks are evenly distributed along the circumference of the turntable and are spaced apart from a plurality of threaded shafts. The limit block is located at the edge of the turntable, and one end of the limit block is detachably connected to the movable template. The other end edge of the limit block protrudes and fixes a limit plate. The limit plate is located in the L-shaped groove, and a gap is formed between the limit plate and the side wall of the L-shaped groove. The design of the limit block has a good limiting effect on the axial direction of the turntable, preventing the turntable from completely separating from the movable template and causing damage; the gap formed between the limit plate and the side wall of the L-shaped groove is beneficial to the smooth rotation of the turntable on the one hand, and to the separation of the turntable and the movable template from a gap of about 1 mm on the other hand; at the same time, the even distribution of the limit blocks is beneficial to improving the balance of the turntable.

[0012] Preferably, a driving motor is provided at the edge of the mobile template, and the driving motor is detachably connected to the mobile template. A driving wheel is provided at the output end of the mobile motor, and a plurality of tooth grooves meshing with the driving wheel are provided at the edge of the turntable. The plurality of tooth grooves are evenly distributed along the circumference of the turntable and are located on the side of the L-shaped groove. The turntable is driven by the driving motor and is connected to the mobile template after the driving wheel meshes with the plurality of tooth grooves. When the driving motor is working, it drives the driving wheel to rotate, and since the driving wheel meshes with the tooth grooves, the turntable is driven to rotate a certain angle.

[0013] Preferably, a plurality of rollers are provided on the edge of the movable template, the rollers are located at the edge of the turntable, the rollers are rotatably connected to the movable template, one side of the L-shaped groove is parallel to the mounting surface, the other side of the L-shaped groove is perpendicular to the mounting surface, the edge of the roller is in contact with the side of the L-shaped groove perpendicular to the mounting surface, and a gap is formed between the roller and the side of the L-shaped groove parallel to the mounting surface. The rollers are conducive to the smooth rotation of the turntable, and are conducive to further improving the balance and stability of the turntable. On the other hand, they are conducive to the gap of about 1 mm between the turntable and the movable template.

[0014] Preferably, the plurality of rollers are evenly divided into two groups, and the two groups of rollers and the driving wheel form a triangular structure, thereby further improving the balance and stability of the turntable.

[0015] The invention has the following beneficial effects: the turntable is prevented from tilting during the disengagement process, thereby achieving the purpose of improving the balance of the turntable; the strength requirement during mold closing is ensured, and at the same time, the balance of the turntable is ensured, so that the male mold and the female mold are closely matched; during the rotation of the turntable, the threaded cap acts on the turntable through the ball bearing, which is beneficial to ensuring the balance of the turntable during rotation, and on the other hand, it is beneficial to reduce wear and make the turntable rotate smoothly; the threaded shaft, the threaded cap, the synchronous belt and the servo motor are convenient and quick to install and disassemble, thereby facilitating maintenance and replacement; the design of the limit block plays a good limiting role in the axial direction of the turntable, preventing the turntable from completely separating from the moving template and causing damage; a gap is formed between the limit plate and the side wall of the L-shaped groove, which is beneficial to the smoothness of the rotation of the turntable on the one hand, and is beneficial to the gap of about 1 mm between the turntable and the moving template on the other hand; at the same time, the uniform distribution of a plurality of limit blocks is beneficial to improving the balance of the turntable; the roller is beneficial to the smooth rotation of the turntable on the one hand, while further improving the balance and stability of the turntable, and on the other hand, it is beneficial to the gap of about 1 mm between the turntable and the moving template. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Longitudinal section of Figure 3 yes Figure 2 A magnified view of the structure at center A; Figure 4 yes Figure 2 A magnified view of the structure at B in the middle; Figure 5 It is a structural diagram of the limit block.

[0017] In the figure: 1. movable template, 2. rotating shaft, 3. turntable, 4. threaded shaft, 5. threaded nut, 6. servo motor, 7. gear, 8. tooth groove one, 9. synchronous belt, 10. tooth groove two, 11. bump, 12. thread groove, 13. spherical groove, 14. ball, 15. mounting block, 16. mounting surface, 17. L-shaped groove, 18. limit block, 19. limit plate, 20. driving motor, 21. driving wheel, 22. tooth groove three, 23. roller. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] Unless otherwise specified, the relative arrangement of the components, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be fixed "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, process and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, process and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0022] like Figure 1 , Figure 2 and Figure 3 In the described embodiment, a turntable disengaging device for a two-color injection molding machine comprises: a moving template 1; a rotating shaft 2, fixed at the center of the moving template 1; a turntable 3, rotatably connected to the moving template 1 through the rotating shaft 2; a plurality of threaded shafts 4, uniformly distributed on the outer edge of the moving template 1 along the circumference of the turntable 3, and fixedly connected to the moving template 1; a plurality of threaded caps 5, one end of which is threadedly connected to the corresponding threaded shaft 4, and the other end of which is in contact with the side wall of the turntable 3; a servo motor 6, which is detachably mounted on the outer side wall of the moving template 1 and is located on the side of the threaded cap 5; a gear 7, fixed on the output end of the servo motor 6; a plurality of tooth grooves 8, which are located on the outer circumferential surface of the threaded cap 5 and are uniformly distributed along the circumference of the threaded cap 5; a synchronous belt 9, which is sleeved on the plurality of threaded caps 5 and meshed with the tooth grooves 8; a plurality of tooth grooves 2 10, which are located on the outer circumferential surface of any one of the threaded caps 5 and on the side of the synchronous belt 9, and meshed with the gear 7.

[0023] like Figure 2 and Figure 3 As shown, a protrusion 11 is provided on the movable template 1 , one side of the protrusion 11 is fixedly connected to the movable template 1 , and the other side of the protrusion 11 corresponding to the protrusion 11 contacts the side wall of the turntable 3 , and the protrusion 11 is located in the synchronous belt 9 .

[0024] like Figure 3 and Figure 4 As shown, one end of the threaded cap 5 is provided with a thread groove 12 matching the threaded shaft 4, and the threaded cap 5 is threadedly connected to the threaded shaft 4 through the thread groove 12. A spherical groove 13 is provided on the other end of the threaded cap 5, and a ball 14 is provided in the spherical groove 13, and the ball 14 is rollingly connected to the spherical groove 13, and the threaded cap 5 contacts the side wall of the rotating disk 3 through the ball 14. The round angle of the spherical groove 13 is greater than 180 degrees.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a plurality of mounting blocks 15 are provided on the edge of the movable template 1, and the mounting blocks 15 are detachably fixedly connected to the movable template 1. The plurality of mounting blocks 15 are evenly distributed along the circumference of the turntable 3 and are located on one side of the turntable 3. The other side corresponding to the turntable 3 is a mounting surface 16. One end of the threaded shaft 4 is fixedly connected to the mounting block 15, and the threaded cap 5 is threadedly connected to the other end of the threaded shaft 4. The servo motor 6 is detachably connected to one of the corresponding mounting blocks 15.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, an L-shaped groove 17 is provided at the edge of the mounting surface 16, and a plurality of limit blocks 18 are provided at the edge of the movable template 1. The plurality of limit blocks 18 are evenly distributed along the circumference of the turntable 3 and are spaced apart from a plurality of threaded shafts 4. The limit blocks 18 are located at the edge of the turntable 3, and one end of the limit blocks 18 is detachably connected to the movable template 1. A limit plate 19 is protrudingly fixed on the edge of the other end of the limit block 18. The limit plate 19 is located in the L-shaped groove 17, and a gap is formed between the limit plate 19 and the side wall of the L-shaped groove 17.

[0027] like Figure 1 As shown, a driving motor 20 is provided at the edge of the movable template 1, and the driving motor 20 is detachably connected to the movable template 1. A driving wheel 21 is provided on the output end of the movable motor, and a plurality of tooth grooves 22 meshing with the driving wheel 21 are provided at the edge of the turntable 3. The plurality of tooth grooves 22 are evenly distributed along the circumference of the turntable 3 and are located on the side of the L-shaped groove 17. Driven by the driving motor 20, the turntable 3 is rotatably connected to the movable template 1 after the driving wheel 21 meshes with the plurality of tooth grooves 22.

[0028] like Figure 1 and Figure 4 As shown, a plurality of rollers 23 are provided at the edge of the mobile template 1, and the rollers 23 are located at the edge of the turntable 3, and the rollers 23 are rotatably connected to the mobile template 1, one side of the L-shaped groove 17 is parallel to the mounting surface 16, and the other side of the L-shaped groove 17 is perpendicular to the mounting surface 16, and the edge of the roller 23 is in contact with the side of the L-shaped groove 17 perpendicular to the mounting surface 16, and a gap is formed between the roller 23 and the side of the L-shaped groove 17 parallel to the mounting surface 16. The plurality of rollers 23 are evenly divided into two groups, and the two groups of rollers 23 and the driving wheel 21 form a triangular structure.

[0029] The mounting surface 16 of the turntable 3 is used to install the male mold; the action of the clamping mechanism of the two-color injection molding machine is as follows: the clamping mechanism pushes the mobile template 1 so that the male mold and the female mold are tightly together; the mold is injected with glue; the clamping mechanism pulls the mobile template 1 in the opposite direction so that the male mold and the female mold are separated; the servo motor 6 works to drive the gear 7 to rotate, thereby driving one of the threaded caps 5 to be screwed out. At the same time, under the action of the synchronous belt 9, the remaining threaded caps 5 also rotate synchronously and act on the turntable 3 through the ball 14, thereby jointly ejecting the turntable 3 outward, so that a gap of about 1 mm is separated between the turntable 3 and the mobile template 1; the drive motor 20 works to drive the drive wheel 21 to rotate. Since the drive wheel 21 is engaged with the tooth groove 22, the turntable 3 is driven to rotate 180°; the servo motor 6 drives the threaded cap 5 to rotate in the opposite direction to return to the initial position; the mold is closed again and glue is injected. In the above process, when the turntable 3 rotates, the threaded cap 5 acts on the turntable 3 through the ball 14, which is beneficial to ensure the balance of the turntable 3 during rotation on the one hand, and to reduce wear on the other hand, so that the turntable 3 rotates smoothly.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-color injection molding machine turntable (3) disengagement device, characterized in that: include: MoveTemplate(1); A rotating shaft (2) fixed at the center of the movable template (1); A rotating disk (3) is rotatably connected to the movable template (1) via the rotating shaft (2); A plurality of threaded shafts (4) are evenly distributed on the outer edge of the movable template (1) along the circumference of the rotating disk (3) and are fixedly connected to the movable template (1); A plurality of threaded caps (5), one end of which is threadably connected to the corresponding threaded shaft (4), and the other end of which is in contact with the side wall of the rotating disk (3); A servo motor (6) is detachably mounted on the outer wall of the movable template (1) and is located on the side of the threaded cap (5); A gear (7) fixed to the output end of the servo motor (6); A plurality of tooth grooves (8) are located on the outer circumferential surface of the threaded cap (5) and are evenly distributed along the circumference of the threaded cap (5); A synchronous belt (9) is sleeved on the plurality of threaded caps (5) and meshes with the tooth groove one (8); A plurality of tooth grooves (10) are located on the outer circumferential surface of any threaded cap (5) and on the side of the synchronous belt (9), and mesh with the gear (7).

2. A two-color injection molding machine turntable (3) disengagement device according to claim 1, characterized in that: The movable template (1) is provided with a protrusion (11), one side of the protrusion (11) is fixedly connected to the movable template (1), the other side of the protrusion (11) corresponding to the protrusion (11) contacts the side wall of the turntable (3), and the protrusion (11) is located inside the synchronous belt (9).

3. The disengagement device for a turntable (3) of a two-color injection molding machine according to claim 1, characterized in that: One end of the threaded cap (5) is provided with a threaded groove (12) matching the threaded shaft (4), and the threaded cap (5) is threadedly connected to the threaded shaft (4) via the threaded groove (12).

4. A two-color injection molding machine turntable (3) disengagement device according to claim 1, characterized in that: A spherical groove (13) is provided on the other end of the threaded cap (5), a ball (14) is provided in the spherical groove (13), the ball (14) is rollingly connected to the spherical groove (13), and the threaded cap (5) is in contact with the side wall of the rotating disk (3) via the ball (14).

5. A two-color injection molding machine turntable (3) disengagement device according to claim 4, characterized in that: The rounded angle of the spherical groove (13) is greater than 180 degrees.

6. A two-color injection molding machine turntable (3) disengaging device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: A plurality of mounting blocks (15) are provided on the edge of the movable template (1), and the mounting blocks (15) are detachably fixedly connected to the movable template (1). The plurality of mounting blocks (15) are evenly distributed along the circumference of the turntable (3) and are located on one side of the turntable (3). The other side corresponding to the turntable (3) is a mounting surface (16). One end of the threaded shaft (4) is fixedly connected to the mounting block (15), and the threaded cap (5) is threadedly connected to the other end of the threaded shaft (4). The servo motor (6) is detachably connected to one of the corresponding mounting blocks (15).

7. A two-color injection molding machine turntable (3) disengagement device according to claim 6, characterized in that: An L-shaped groove (17) is provided at the edge of the mounting surface (16); a plurality of limit blocks (18) are provided at the edge of the movable template (1); the plurality of limit blocks (18) are evenly distributed along the circumference of the turntable (3) and are spaced apart from the plurality of threaded shafts (4); the limit blocks (18) are located at the edge of the turntable (3); one end of the limit blocks (18) is detachably connected to the movable template (1); a limit plate (19) is protrudingly fixed on the edge of the other end of the limit blocks (18); the limit plate (19) is located in the L-shaped groove (17); a gap is formed between the limit plate (19) and the side wall of the L-shaped groove (17).

8. A two-color injection molding machine turntable (3) disengaging device according to claim 7, characterized in that: The edge of the movable template (1) is provided with a driving motor (20), the driving motor (20) and the movable template (1) are detachably connected, a driving wheel (21) is provided on the output end of the movable motor, and the edge of the turntable (3) is provided with a plurality of tooth grooves (22) meshing with the driving wheel (21), the plurality of tooth grooves (22) are evenly distributed along the circumference of the turntable (3) and are located on the side of the L-shaped groove (17), and the turntable (3) is driven by the driving motor (20) to be rotatably connected to the movable template (1) after the driving wheel (21) meshes with the plurality of tooth grooves (22).

9. A two-color injection molding machine turntable (3) disengaging device according to claim 8, characterized in that: A plurality of rollers (23) are provided at the edge of the movable template (1). The rollers (23) are located at the edge of the turntable (3). The rollers (23) are rotatably connected to the movable template (1). One side of the L-shaped groove (17) is parallel to the mounting surface (16), and the other side of the L-shaped groove (17) is perpendicular to the mounting surface (16). The edge of the roller (23) is in contact with a side of the L-shaped groove (17) that is perpendicular to the mounting surface (16), and a gap is formed between the roller (23) and a side of the L-shaped groove (17) that is parallel to the mounting surface (16).

10. A two-color injection molding machine turntable (3) disengagement device according to claim 9, characterized in that: The plurality of rollers (23) are evenly divided into two groups, and the two groups of rollers (23) and the driving wheel (21) form a triangular structure.

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