Rotary ejection device of injection mold

Abstract

The utility model discloses a rotary ejection device of an injection mold, the rotary ejection device of the injection mold is at least used for cooperating with an injection molding machine to carry out injection molding work, the injection molding machine is provided with an ejection rod, and the ejection direction of the ejection rod is a first direction. The mold is provided with a rotating center, the first face is provided with a containing space at least partially matched with the shape of the mold, and the mold and the containing space jointly form an injection molding space; the moving plate is provided with a driving assembly, the driving assembly is in transmission connection with the mold, and the driving assembly is at least used for driving the mold to rotate around the rotating center; the ejector rod penetrates through the second face and then is fixedly connected with the moving plate. And the extension rod is arranged on the moving plate, penetrates through the first surface and is at least used for limiting rotation of the injection molding finished product. The rotary ejection device of the injection mold, provided by the utility model, has the effects of low manufacturing cost and few demolding steps.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding equipment, and in particular relates to a rotary ejection device for an injection mold. Background Art

[0002] In recent years, the injection molding process has developed rapidly due to its advantages of low cost and high efficiency. Injection molding is a molding method that combines injection and molding. It can produce parts with complex shapes and is suitable for mass production and molding processing fields such as complex-shaped products. More and more plastic parts will be molded by injection molding, and the structure and types of injection-molded plastic parts are also more diversified.

[0003] For plastic products with arc front mold, during demoulding, the demoulding direction of the undercut part is inconsistent with the mold opening direction. Generally, the demoulding is carried out through a three-slide structure. However, this mold structure is relatively complex, the manufacturing cost is high, and there are many demoulding steps, which is not conducive to the demoulding operation of the product. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a rotary ejection device for an injection mold.

[0005] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes:

[0006] A rotary ejector device for an injection mold, at least used to cooperate with an injection molding machine to perform injection molding, wherein the injection molding machine has an ejector pin, and the injection molding machine can drive the ejector pin to eject and retract, wherein the ejector pin ejects in a first direction, and comprises:

[0007] A body, the body being at least used for fixed connection with the injection molding machine, the body having a first surface and a second surface which are arranged in sequence along a first direction and are opposite to each other, and the body being provided with a movement space extending along the first direction;

[0008] A mold, wherein the mold is provided with a rotation center, the angle between the rotation axis of the mold and the first direction is less than 90°, an accommodating space is provided on the first surface, at least a part of the accommodating space matches the shape of the mold, and when the mold is located in the accommodating space, the mold and the accommodating space jointly form an injection molding space;

[0009] A moving plate, the moving plate is located in the moving space, and the moving range of the moving plate in the moving space is not less than the length of the mold in the first direction; a driving assembly is arranged on the moving plate, the driving assembly is in transmission connection with the mold, and the driving assembly is at least used to drive the mold to rotate around the rotation center; the ejector rod is fixedly connected to the moving plate after passing through the second surface, and the ejector rod is at least used to drive the moving plate to move in the first direction in the moving space;

[0010] An extension rod is arranged on the moving plate and passes through the first surface. The length of the extension rod is greater than the distance between the moving plate and the injection molding space. The extension rod is at least used to limit the rotation of the injection molded product.

[0011] Preferably, the rotation axis of the mold is parallel to the first direction; the driving assembly comprises a rack and a rotating rod, the rotating rod is movably connected to the moving plate, so that the rotating rod can rotate at a fixed position of the moving plate, the rotating rod extends into the accommodating space and is fixedly connected to the rotation center of the mold, and the rotating rod is colinear with the rotation axis of the mold; the rotating rod is provided with a gear meshing with the rack, and the rack is movably provided on the moving plate, so that the rack can move perpendicular to the first direction;

[0012] When the moving plate moves to a side of the moving space close to the first surface, the rotating rod extends out of the accommodating space.

[0013] Preferably, a sliding groove for accommodating the rack is provided on the moving plate.

[0014] In the utility model, the slide groove can limit the movement direction of the rack and is beneficial to improving the stability of the rack.

[0015] Preferably, a limiting component is provided in the slide groove, and the limiting component is at least used to limit the movement range of the rack; when the limiting component limits the rack, the mold rotates to a position relative to the accommodating space.

[0016] In the utility model, the limiting component can limit the movement range of the rack, which is beneficial to the positioning posture of the mold.

[0017] Preferably, the moving plate includes a first plate and a second plate connected to each other, and the top rod is fixedly connected to the second plate; the slide groove is arranged on the first plate and is close to the second plate; the first plate is also provided with an installation space for accommodating the gear, and the installation space is connected to the slide groove.

[0018] Preferably, the main body and the moving board are movably connected via a guide assembly.

[0019] In the utility model, the guide assembly can limit the movement track of the moving board, which is beneficial to improving the stability of the moving board.

[0020] Preferably, the guide assembly includes a guide rod, a through hole is provided on the first surface, one end of the guide rod is connected to the moving plate, and the other end extends into the through hole, and the guide rod is parallel to the first direction.

[0021] Preferably, the number of the extension rod is one, and the end of the extension rod has a protrusion perpendicular to the first direction.

[0022] Preferably, the number of the extension rods is at least two, and several of the extension rods are parallel to each other.

[0023] Compared with the prior art, the advantages of the utility model include:

[0024] (1) The utility model provides a rotary ejection device for an injection mold, which has a simple structure, is easy to maintain, and has a low manufacturing cost;

[0025] (2) The utility model provides a rotary ejection device for an injection mold. When demolding, the ejector rod drives the moving plate to move in a direction close to the first surface, and the injection molded product and the mold extend out of the main body. The driving assembly drives the mold to rotate, and the extension rod hinders the rotation of the accommodation product, thereby pulling out the injection molded product. Demolding is performed by ejecting the mold and then pulling out the injection molded product, which reduces the demolding steps and facilitates the demolding operation.

[0026] (3) The utility model provides a rotary ejection device for an injection mold, wherein the accommodating space matches the mold shape, which is beneficial to improving the positioning accuracy of the mold within the accommodating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is an overall schematic diagram of the injection molded product involved in the utility model;

[0029] Figure 2 It is an overall schematic diagram of the injection molded product and the mold in the utility model;

[0030] Figure 3 It is an overall schematic diagram of the rotary ejection device of the injection mold in the utility model;

[0031] Figure 4 for Figure 3 The enlarged schematic diagram of the middle A part;

[0032] Figure 5 It is a schematic diagram of the state of the rotary ejection device of the injection mold in the present invention ready for injection molding;

[0033] Figure 6 for Figure 5 The enlarged schematic diagram of the middle B part;

[0034] Figure 7 It is a cross-sectional schematic diagram of the rotary ejection device of the injection mold in the utility model;

[0035] Figure 8 It is an overall schematic diagram of the sports board in the utility model;

[0036] Fig. 9 It is an overall schematic diagram of the first plate in the utility model;

[0037] Fig.10 It is a schematic diagram of the rotation ejection device of the injection mold in the utility model, in which the mold rotates after being ejected.

[0038] Reference numerals:

[0039] 11. Injection molded product; 12. Mold; 13. Rotation center; 14. Main body; 15. First surface; 16. Second surface; 17. Movement space; 18. Injection molding space; 21. Movement plate; 22. First plate; 23. Second plate; 24. Guide rod; 25. Extension rod; 26. Rack; 27. Gear; 28. Rotation rod; 29. ​​Cylinder. DETAILED DESCRIPTION

[0040] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0041] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model. The embodiments described are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, the present utility model covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present utility model defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0042] In the description of the present application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0043] In the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, when positional terms such as both sides, outside, up and down are used, it should be understood that they are only used to facilitate understanding and description, considering that the structure may be facing other positions.

[0044] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The embodiment of the utility model is intended to introduce and illustrate the structural composition of the rotary ejector device of the injection mold and the matching relationship between the various component structures. Unless otherwise specified, the size, material and manufacturing process of each component in the rotary ejector device suitable for the injection mold in the embodiment of the utility model can be selected according to the specific situation and are not particularly limited or explained here.

[0046] Further, in order to make the public have a better understanding of the utility model, some specific details are described in detail in the following detailed description of the utility model. For those skilled in the art, the utility model can be fully understood without the description of these details.

[0047] Example

[0048] See also Figure 1 The injection molded product 11 of this embodiment is block-shaped at one end and arc-shaped at the other end. The rotary ejector device of the injection mold of this embodiment is used to cooperate with the injection molding machine to perform injection molding, specifically to assist in the injection molding demoulding work; the injection molding machine has an ejector pin, and the injection molding machine can drive the ejector pin to eject and retract, and the ejection direction of the ejector pin is the first direction.

[0049] See also Figure 1 and Figure 2 The mold 12 involved in this embodiment matches the arc portion of the injection molded product 11. When the mold 12 is not separated from the injection molded product 11, the end of the mold 12 away from the end of the injection molded product 11 has a rotation center, and the angle between the rotation axis of the mold 12 and the first direction is less than 90°.

[0050] Specifically, the rotation axis of the mold 12 is parallel to the first direction, and the mold 12 has a thickness of .

[0051] See also Figures 3 to 7 A rotary ejection device for an injection mold includes a body 14, which is at least used to be fixedly connected to an injection molding machine to cooperate with the injection molding machine to perform injection molding. The body 14 is provided with a first surface 15 and a second surface 16 that are separated from each other, and the first surface 15 and the second surface 16 are arranged in sequence along a first direction. The body 14 is provided with a movement space 17 extending along the first direction, and a receiving space is provided on the first surface 15. At least part of the receiving space matches the shape of the mold 12. When the mold 12 is located in the receiving space, the mold 12 and the receiving space together form an injection space 18.

[0052] A rotary ejection device for an injection mold further includes a moving plate 21, a moving space 17 extending along a first direction is further provided on the body 14, the moving plate 21 is located in the moving space 17, and the moving range of the moving plate 21 in the moving space 17 is not less than the length of the mold 12 in the first direction. The ejector rod passes through the second surface 16 and is fixedly connected to the moving plate 21, and the ejector rod is at least used to drive the moving plate 21 to move in the moving space 17 along the first direction.

[0053] Specifically, the movement space 17 vertically penetrates the body 14 .

[0054] Specifically, a through hole is formed on the second surface 16, and the top rod passes through the through hole and is fixedly connected to the moving plate 21. The difference between the length of the moving space 17 in the first direction and the thickness of the moving plate 21 is equal to .

[0055] Preferably, the main body 14 and the moving plate 21 are movably connected via a guide assembly.

[0056] Further preferably, the guide assembly includes a guide rod 24, a through hole is provided on the first surface 15, one end of the guide rod 24 is connected to the moving plate 21, and the other end extends into the through hole, and the guide rod 24 is parallel to the first direction.

[0057] It can be understood that the guide rod 24 and the through hole can limit the movement trajectory of the moving plate 21 , and the guiding effect of the guide rod 24 and the through hole is beneficial to improving the movement stability of the moving plate 21 .

[0058] A rotary ejection device for an injection mold also includes an extension rod 25, which is arranged on a moving plate 21 and passes through a first surface 15. The length of the extension rod 25 is greater than the distance between the moving plate 21 and the injection space 18. The extension rod 25 is at least used to limit the rotation of the injection molded product 11.

[0059] Preferably, the number of the extension rods 25 is at least two, and the extension rods 25 are parallel to each other.

[0060] Specifically, in this embodiment, there are four extension rods 25 and they are all fixedly connected to the moving plate 21. The four extension rods 25 are parallel to each other and have the same length. When the moving plate 21 is located on the side close to the second surface 16 in the moving space 17, the ends of the four extension rods 25 are all located in the injection molding space 18.

[0061] It is understandable that, during demoulding, the four extension rods 25 can limit the rotation of the injection molded product 11 in a direction perpendicular to the first direction; in other embodiments, the number of the extension rods 25 may be two, three, or more than five.

[0062] In other embodiments, the number of the extension rod 25 may also be one. In this case, a protrusion perpendicular to the first direction is provided at the end of the extension rod 25 .

[0063] See also Figure 3 , Figure 8 , Fig. 9 and Fig.10 In this embodiment, a driving assembly is provided on the moving plate 21, and the driving assembly is transmission-connected with the mold 12, and the driving assembly is at least used to drive the mold 12 to rotate around the rotation center.

[0064] Preferably, the rotation axis of the mold 12 is parallel to the first direction.

[0065] Preferably, the moving plate 21 includes a first plate 22 and a second plate 23 connected to each other, and the top rod is fixedly connected to the second plate 23 .

[0066] Specifically, the top rod is fixedly connected to the second plate 23, and the first plate 22 and the second plate 23 can be connected to each other by bolts and nuts.

[0067] Preferably, a slide groove and an installation space are provided on the first plate 22 , and the slide groove and the installation space are interconnected and both are located between the first plate 22 and the second plate 23 .

[0068] Specifically, the chute is arranged vertically.

[0069] Preferably, the driving assembly includes a rack 26 and a rotating rod 28, and the rotating rod 28 is movably connected to the moving plate 21 so that the rotating rod 28 can rotate at a fixed position of the moving plate 21, and the rotating rod 28 extends into the accommodating space and is fixedly connected to the rotation center of the mold 12, and the rotating rod 28 is colinear with the rotation axis of the mold 12; a gear 27 meshing with the rack 26 is provided on the rotating rod 28, and the rack 26 is movably provided on the moving plate 21 so that the rack 26 can move perpendicular to the first direction; when the moving plate 21 moves to the side of the moving range close to the first surface 15, the rotating rod 28 extends out of the accommodating space.

[0070] Specifically, a cylinder 29 is provided on the top of the first plate 22, the cylinder 29 is fixedly connected to the rack 26, the slide groove is used to accommodate the rack 26, the installation space is used to accommodate the gear 27, the rotating rod 28 is connected to the first plate 22 through a bearing and passes through the first plate 22, and the rotation axis of the rotating rod 28 is parallel to the first direction. When the moving plate 21 is located on the side close to the first surface 15 in the moving space 17, the mold 12 is completely ejected from the accommodation space, and when the moving plate 21 is located on the side close to the second surface 16 in the moving space 17, the mold 12 is embedded in the accommodation space.

[0071] It is understandable that when the oil cylinder 29 drives the rotating rod 28 to rotate, it can eventually drive the mold 12 to rotate around the rotation center 13.

[0072] Preferably, a limiting component is provided in the slide groove, and the limiting component is at least used to limit the movement range of the rack 26; when the limiting component limits the rack 26, the mold 12 rotates to a position relative to the accommodating space.

[0073] Specifically, a blocking surface is provided in the slide groove, and a slope is provided on the rack 26. The blocking surface matches the slope shape and faces each other. The blocking surface is located below the slope. When demolding is completed, when the cylinder 29 drives the mold 12 to return to the center, the blocking surface and the slope can improve the accuracy of the return of the mold 12.

[0074] Working principle: In this embodiment, when demolding, the ejector rod extends to eject the second plate 23, and finally drives the rotating rod 28 to move, so that the mold 12 moves out of the accommodation space, and at this time, the four extension rods 25 also move synchronously with the rotating rod 28; then the oil cylinder 29 drives the rack 26 to move upward, thereby driving the rotating rod 28 to rotate, and finally driving the mold 12 to rotate. At this time, the four extension rods 25 can prevent the injection molded product 11 from rotating, and the rotating mold 12 is finally separated from the injection molded product 11.

[0075] After demolding is completed, the cylinder 29 drives the rack 26 to move downward, thereby driving the mold 12 to rotate back to the center. During this process, the blocking surface can limit the movement range of the inclined surface. When the blocking surface abuts against the inclined surface, the mold 12 is just returned to the center; then the push rod contracts, driving the second plate 23 to move, and finally driving the rotating rod 28 to retract, and retract the mold 12 into the accommodating space.

[0076] In the prior art, the mold is usually separated first, the injection molded product is ejected, and then the mold is returned to the body. However, during the return process, the mold is easily rubbed and collided with the inner wall of the body, resulting in deformation and damage of the mold.

[0077] In this embodiment, the rotary ejection device of the injection mold 12 first ejects the mold 12 and the injection molded product 11, and then separates the mold 12 and the injection molded product 11. In this way, compared with the method of first separating the mold 12 and then ejecting the injection molded product 11 in the prior art, the damage to the mold 12 during the return process can be reduced.

[0078] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, some simple deductions or substitutions can be made without departing from the concept of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A rotary ejector device for an injection mold, at least used to cooperate with an injection molding machine to perform injection molding, wherein the injection molding machine has an ejector pin, and the injection molding machine can drive the ejector pin to eject and retract, and the ejection direction of the ejector pin is a first direction, characterized in that: include: A body (14), the body (14) being at least used for fixed connection with the injection molding machine, the body (14) comprising a first surface (15) and a second surface (16) which are arranged in sequence and opposite to each other along a first direction, and the body (14) is provided with a movement space (17) extending along the first direction; A mold (12), wherein the mold (12) is provided with a rotation center, the angle between the rotation axis of the mold (12) and the first direction is less than 90 degrees, a receiving space is provided on the first surface (15), at least a part of the receiving space matches the shape of the mold (12), and when the mold (12) is located in the receiving space, the mold (12) and the receiving space together form an injection molding space (18); A moving plate (21), the moving plate (21) being located in the moving space (17), the moving range of the moving plate (21) in the moving space (17) being not less than the length of the mold (12) in the first direction; a driving assembly being arranged on the moving plate (21), the driving assembly being in transmission connection with the mold (12), the driving assembly being at least used for driving the mold (12) to rotate around the rotation center; the ejector rod being fixedly connected to the moving plate (21) after passing through the second surface (16), the ejector rod being at least used for driving the moving plate (21) to move in the moving space (17) along the first direction; An extension rod (25), wherein the extension rod (25) is arranged on the moving plate (21) and passes through the first surface (15), the length of the extension rod (25) is greater than the distance between the moving plate (21) and the injection molding space (18), and the extension rod (25) is at least used to limit the rotation of the injection molded product (11).

2. The rotary ejector device for an injection mold according to claim 1, characterized in that: The rotation axis of the mold (12) is parallel to the first direction; the driving assembly comprises a rack (26) and a rotating rod (28); the rotating rod (28) is movably connected to the moving plate (21) so that the rotating rod (28) can rotate at a fixed position of the moving plate (21); the rotating rod (28) extends into the accommodating space and is fixedly connected to the rotation center of the mold (12); the rotating rod (28) and the rotation axis of the mold (12) are colinear; a gear (27) meshing with the rack (26) is provided on the rotating rod (28); the rack (26) is movably provided on the moving plate (21) so that the rack (26) can move perpendicular to the first direction; When the moving plate (21) moves to a side of the moving space (17) close to the first surface (15), the rotating rod (28) extends out of the accommodating space.

3. The rotary ejector device for an injection mold according to claim 2, characterized in that: The moving plate (21) is provided with a sliding groove for accommodating the rack (26).

4. The rotary ejector device for an injection mold according to claim 3, characterized in that: A limiting component is arranged in the slide groove, and the limiting component is at least used to limit the movement range of the rack (26); when the limiting component limits the rack (26), the mold (12) rotates to a position relative to the accommodating space.

5. The rotary ejector device for an injection mold according to claim 3, characterized in that: The moving plate (21) comprises a first plate (22) and a second plate (23) which are connected to each other, and the top rod is fixedly connected to the second plate (23); the slide groove is arranged on the first plate (22) and is located close to the second plate (23); the first plate (22) is also provided with an installation space for accommodating the gear (27), and the installation space is connected to the slide groove.

6. The rotary ejector device for an injection mold according to claim 1, characterized in that: The body (14) and the moving plate (21) are movably connected via a guide assembly.

7. The rotary ejector device for an injection mold according to claim 6, characterized in that: The guide assembly comprises a guide rod (24), a through hole is provided on the first surface (15), one end of the guide rod (24) is connected to the moving plate (21), and the other end extends into the through hole, and the guide rod (24) is parallel to the first direction.

8. The rotary ejector device for an injection mold according to claim 1, characterized in that: The number of the extension rod (25) is one, and the end of the extension rod (25) has a protrusion perpendicular to the first direction.

9. The rotary ejector device for an injection mold according to claim 1, characterized in that: The number of the extension rods (25) is at least two, and a plurality of the extension rods (25) are parallel to each other.

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