Mold assembly and injection molding equipment

Abstract

The utility model provides a mold assembly and injection molding equipment, the mold assembly comprises a body and a pitched roof structure, the pitched roof structure comprises a pitched roof rod, a pitched roof seat and a pitched roof guide block; an inclined ejection head used for ejecting a product is formed on the inclined ejection rod, the inclined ejection rod is in running fit with the inclined ejection seat, a guide through groove is formed in the inclined ejection guide block, the inclined ejection rod movably penetrates through the guide through groove, and when the inclined ejection seat moves towards the inclined ejection guide block, the inclined ejection head is located on the inclined ejection rod. The angle ejector rod can rotate in the ejection direction relative to the guide through groove, the angle ejector rod can rotate in the shrinkage avoiding direction relative to the guide through groove, and the ejection direction is not parallel to the shrinkage avoiding direction. Compared with the prior art, the inclined ejection structure can adapt to the inward shrinkage of the product and rotate towards the shrinkage avoiding direction while obliquely ejecting the product, so that the condition that the product is difficult to take down as the inclined ejection head is compressed by the shrinkage of the product is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a mold component and injection molding equipment. Background Art

[0002] During the production process of injection molded products, the product needs to be ejected when the injection molding is completed to facilitate removal.

[0003] For molds of products with high and deep cavities, since there are a large number of undercut features on both sides of the product, the ejection method is to move the inclined ejector along the side wall to eject the undercut. After the inclined ejector is ejected, due to the shrinkage of the product, the product will exert a certain clamping force on the inclined ejector, making it impossible for the robot to remove the part smoothly.

[0004] Currently, conventional high- and deep-cavity products often have beveled ejector snap-in locations on the sides. To ensure smooth part removal after the beveled ejector is released, a secondary ejection structure is designed. This involves adding two plates to the ejector plate, on which the corresponding ejectors are arranged, and installing mechanical structures such as a snap-in mechanism on the outside of the mold base. During ejection, after the beveled ejector is released from its snap-in location, it stops moving, and the added ejector plate continues to eject the ejector, allowing the side wall of the product to disengage from the beveled ejector, preventing the product from clinging to the beveled ejector and allowing smooth part removal. However, the need for additional motion structures complicates the mold structure, increases mold thickness, and increases equipment size, as well as lengthens the production cycle, leading to increased overall production costs. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide a mold assembly and an injection molding device.

[0006] One embodiment of the utility model provides a sloping roof structure, comprising: a sloping roof rod, a sloping roof seat and a sloping roof guide block;

[0007] The inclined ejector rod is formed with an inclined ejector head for ejecting products, the inclined ejector rod is rotatably engaged with the inclined ejector seat, the inclined ejector guide block is provided with a guide slot, the inclined ejector rod moves through the guide slot, and when the inclined ejector seat moves toward the inclined ejector guide block, the inclined ejector rod can rotate relative to the guide slot toward the ejection direction, and the inclined ejector rod can rotate relative to the guide slot toward the contraction and avoidance direction, and the ejection direction and the contraction and avoidance direction are not parallel.

[0008] Compared with the prior art, the inclined ejector structure of the present invention can adapt to the inward shrinkage of the product and rotate in the shrinkage avoidance direction while tilting the ejector to eject the product, thereby avoiding the situation where the inclined ejector head is tightly pressed by the shrinkage of the product, making it difficult to remove the product.

[0009] Another embodiment of the present invention provides a mold assembly, comprising: a main body and several inclined ejector structures as described above, wherein a cavity and several ejection channels connected to the cavity are formed on the main body, the inclined ejector guide block is arranged on the main body, the guide groove is connected to the ejection channel, the inclined ejector rod is movably arranged in the ejection channel, the inclined ejector head is located on the side of the cavity, and the shrinkage avoidance direction is toward the cavity.

[0010] In some optional embodiments, an avoidance groove is formed on the side of the inclined ejector rod facing the retraction avoidance direction, and the avoidance groove is located between the inclined ejector head and the inclined ejector seat. When the inclined ejector seat moves toward the inclined ejector guide block, a movable gap is formed between the avoidance groove and the ejection channel for the ejector rod to rotate toward the retraction avoidance direction.

[0011] In some optional embodiments, the ejection direction is perpendicular to the shrinkage avoidance direction.

[0012] In some optional embodiments, a sealing section is further formed on the inclined ejector rod and is located between the inclined ejector head and the inclined ejector seat. After the inclined ejector seat moves away from the inclined ejector guide block, the sealing section closes the ejection channel.

[0013] In some optional embodiments, a relief groove is formed on one side of the inclined ejector rod facing the contraction avoidance direction, and the inclined ejector head, the sealing section, and the relief groove are sequentially arranged in a direction close to the inclined ejector seat. When the inclined ejector seat moves toward the inclined ejector guide block, a movable gap is formed between the relief groove and the ejection channel for the ejector rod to rotate in the contraction avoidance direction.

[0014] The inner wall of the avoidance groove is formed with a first transition slope gradually extending toward the sealing section.

[0015] In some optional embodiments, a contoured protrusion adapted to the shape of the product is formed in the mold cavity, the contoured protrusion is located on the side of the ejection channel, and a second transition slope is provided on the side of the inclined ejector rod facing the contoured protrusion, and the second transition slope is located between the inclined ejector head and the sealing section.

[0016] In some optional embodiments, the mold assembly includes a plurality of the inclined top structures, and the main body is provided with a plurality of ejection channels respectively arranged on both sides of the mold cavity, and the plurality of the inclined top structures are respectively arranged on both sides of the mold cavity, and the inclined top rods of the inclined top structures are correspondingly movably arranged through the ejection channels.

[0017] In some optional embodiments, an avoidance recess is formed on the side of the inclined ejector rod facing the ejection direction and on the side being ejected in the ejection direction, and the avoidance recess is located between the inclined ejector head and the inclined ejector seat. When the inclined ejector seat moves toward the inclined ejector guide block, an avoidance gap is formed between the avoidance groove and the ejection channel.

[0018] Compared with the prior art, the mold assembly of the present invention can adapt to the shrinkage of the product and rotate in the direction of the shrinkage avoidance while tilting the product out through the inclined ejector structure, thereby avoiding the situation where the inclined ejector head is tightly pressed by the shrinkage of the product, making it difficult to remove the product. In addition, through the overall shape and structure design of the inclined ejector rod, the inclined ejector rod can move smoothly and is not easy to get stuck.

[0019] Another embodiment of the present invention provides an injection molding device, comprising: a mold assembly as described above.

[0020] In order to more clearly understand the present invention, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of one side of a sloping roof structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a sloping roof structure according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of one side of a mold assembly according to one embodiment of the present invention when ejecting a product;

[0024] Figure 4 This is a schematic structural diagram of the other side of the mold assembly when ejecting a product according to one embodiment of the present invention;

[0025] Figure 5 This is a schematic structural diagram of a portion of a mold assembly according to an embodiment of the present invention;

[0026] Figure 6 for Figure 5 An enlarged view of point A is shown;

[0027] Figure 7 This is a cross-sectional view of a partial structure of a mold assembly according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 10. Ejector rod; 11. Ejector head; 12. Avoidance groove; 121. Active gap; 13. Sealing section; 14. Sealing surface; 15. First transition slope; 16. Second transition slope; 17. Avoidance recess; 20. Ejector seat; 30. Ejector guide block; 31. Guide groove; 40. Main body; 41. Cavity; 42. Ejection channel; 43. Contoured protrusion; 50. Product. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0032] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the description of this utility model, reference to the terms "one embodiment," "some optional implementations," or "some optional embodiments" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] See also Figure 1 and Figure 2 An embodiment of the present invention provides a tilting roof structure, including: a tilting roof rod 10, a tilting roof seat 20 and a tilting roof guide block 30.

[0035] The lift rod 10 is formed with a lift head 11 for ejecting the product 50. The lift rod 10 is rotatably engaged with the lift seat 20. The lift guide block 30 is provided with a guide slot 31. The lift rod 10 moves through the guide slot 31. When the lift seat 20 moves toward the lift guide block 30, the lift rod 10 can rotate relative to the guide slot 31 in the ejection direction. The lift rod 10 can also rotate relative to the guide slot 31 in the retraction and avoidance direction. The ejection direction and the retraction and avoidance directions are not parallel. Figure 3 and Figure 4 When the inclined ejector 10 ejects the product 50, the inclined ejector 10 needs to maintain an inclined angle. When the inclined ejector seat 20 approaches the inclined ejector guide block 30, the angle of the inclined ejector 10 relative to the inclined ejector seat 20 will change, that is, it will rotate in the ejection direction. Since the inclined ejector head 11 extends into the structure of the product 50, after the product 50 is ejected from the mold, due to the lack of mold support, the product 50 will shrink. This will cause the inner wall of the product 50 to squeeze the inclined ejector head 11 in the shrinkage avoidance direction. The inclined ejector 10 can rotate in the shrinkage avoidance direction, thereby preventing the product 50 from squeezing the inclined ejector 10 and making it difficult to remove the product 50 from the inclined ejector head 11. In the figure, the inclined ejector head 11 is arranged on the side of the product 50, and the ejection direction extends along the side of the product 50. The shrinkage avoidance direction is toward the middle of the product 50, and the shrinkage avoidance direction is perpendicular to the ejection direction.

[0036] In this embodiment, the inclined ejector seat 20 adopts two base blocks, and the inclined ejector rod 10 is arranged between the two base blocks and rotated with the base blocks through a rotating shaft. The inclined ejector rod 10 can rotate toward the ejection direction relative to the rotating shaft, and there is a certain gap between the inclined ejector rod 10 and the base blocks to facilitate the rotation of the inclined ejector rod 10 toward the retraction and avoidance direction.

[0037] See also Figure 3 and Figure 4The above-mentioned inclined ejector structure can be applied to a mold assembly, comprising: a main body 40 and a plurality of inclined ejector structures as described above, wherein a cavity 41 and a plurality of ejection channels 42 connected to the cavity 41 are formed on the main body 40, a inclined ejector guide block 30 is provided on the main body 40, a guide groove 31 is connected to the ejection channel 42, an inclined ejector rod 10 is movably provided in the ejection channel 42, and an inclined ejector head 11 is located at the side of the cavity 41, with the retraction and avoidance direction facing the cavity 41. It should be noted that the structural principle of the mold assembly is a technology well known to those skilled in the art and will not be elaborated here. In the figure, for the sake of simplicity and clarity, only part of the structure of the main body 40 is shown.

[0038] See also Figure 5 and Figure 6 In some optional embodiments, a side of the lift rod 10 facing the direction of contraction and avoidance is formed with a relief groove 12. The relief groove 12 is located between the lift head 11 and the lift seat 20. When the lift seat 20 moves toward the lift guide block 30, a movable gap 121 is formed between the relief groove 12 and the ejection channel 42, allowing the lift rod to rotate in the direction of contraction and avoidance. The movable gap 121 allows the lift rod 10 to rotate in the direction of contraction and avoidance, thereby preventing the lift rod 10 and the ejection channel 42 of the body 40 from being squeezed and interfering with each other. It should be noted that, due to the structural design, as the lift rod 10 rotates in the direction of contraction and avoidance, the movable gap 121 will gradually decrease. If the inner wall of the relief groove 12 can abut the inner wall of the ejection channel 42, the movable gap 121 will disappear. Of course, the common practice is to increase the movable gap 121 sufficiently to prevent the inner wall of the relief groove 12 from abutting the inner wall of the ejection channel 42, thereby retaining a certain margin to accommodate the different degrees of contraction of the product 50. When the lift seat 20 moves away from the lift guide block 30 so that part of the avoidance groove 12 is located in the guide groove 31 , there is also a certain distance between the avoidance groove 12 and the inner wall of the guide groove 31 , thereby facilitating the smooth movement of the lift rod 10 .

[0039] In this embodiment, the depth of the avoidance groove 12 is approximately 2.5 mm, and the distance between the avoidance groove 12 and the inner wall of the guide groove 31 is approximately 2 mm. Of course, the depth of the avoidance groove 12 can also adopt other appropriate dimensions.

[0040] In this embodiment, the inclined ejector head 11 is arranged on the side of the product 50, and the ejection direction extends along the side of the product 50, and the shrinkage avoidance direction is toward the middle of the product 50. The shrinkage avoidance direction and the ejection direction are perpendicular to each other, and the ejection direction is perpendicular to the shrinkage avoidance direction.

[0041] In some optional embodiments, a sealing section 13 is further formed on the inclined ejector rod 10 and is located between the inclined ejector head 11 and the inclined ejector seat 20. During injection molding, the inclined ejector seat 20 drives the inclined ejector rod 10 to move away from the inclined ejector guide block 30, so that the sealing section 13 enters the ejection channel 42 and closes the ejection channel 42, thereby preventing the injected material from entering the ejection channel 42.

[0042] See also Figure 7 In some optional embodiments, the inclined ejector pin 10 further includes a sealing surface 14 located between the inclined ejector head 11 and the sealing section 13. The sealing surface 14 abuts against the portion of the cavity 41 surrounding the ejection channel 42, thereby improving the sealing between the sealing section 13 and the ejection channel 42. The sealing surface 14 also serves to constrain the inclined ejector head 11.

[0043] In some optional embodiments, a relief groove 12 is formed on the side of the inclined ejector rod 10 facing the direction of retraction and avoidance. The inclined ejector head 11, the sealing section 13, and the relief groove 12 are arranged in sequence near the inclined ejector seat 20. When the inclined ejector seat 20 moves toward the inclined ejector guide block 30, a movable gap 121 is formed between the relief groove 12 and the ejection channel 42 for the ejector rod to rotate in the direction of retraction and avoidance. The inner wall of the relief groove 12 is formed with a first transition slope 15 that gradually extends toward the sealing section 13. When the inclined ejector seat 20 moves away from the inclined ejector guide block 30, the inclined ejector seat 20 will drive the sealing section 13 of the inclined ejector rod 10 toward the ejection channel 42. At this time, the portion between the relief groove 12 and the sealing section 13 may be stuck around the edge of the ejection channel 42. In order to allow the sealing section 13 to smoothly enter the ejection channel 42, the first transition slope 15 is additionally provided. The first transition slope 15 can abut against the edge of the ejection channel 42 to guide the sealing section 13 into the ejection channel 42.

[0044] In some optional embodiments, a contoured protrusion 43 adapted to the shape of the product 50 is formed within the mold cavity 41. The contoured protrusion 43 is located on the side of the ejection channel 42. A second transition slope 16 is provided on the side of the ejector pin 10 facing the contoured protrusion 43. The second transition slope 16 is located between the ejector head 11 and the sealing section 13. When the ejector seat 20 moves away from the ejector guide block 30, the ejector head 11 of the ejector pin 10 moves toward the ejection channel 42. At this time, the portion between the ejector head 11 and the sealing section 13 may become stuck on the contoured protrusion 43. To facilitate smooth movement of the ejector head 11, the second transition slope 16 is additionally provided. The second transition slope 16 can abut against the edge of the contoured protrusion 43, guiding the ejector head 11 to avoid the contoured protrusion 43.

[0045] The number of inclined roof structures can be selected according to actual needs. For example, in some optional embodiments, the mold assembly includes multiple inclined roof structures, and the main body 40 is provided with multiple ejection channels 42 respectively arranged on both sides of the cavity 41. The multiple inclined roof structures are respectively arranged on both sides of the cavity 41, and the inclined roof rods 10 of the inclined roof structures are correspondingly movably arranged in the ejection channels 42. It should be noted that the shrinkage and avoidance directions of the inclined roof structures on both sides of the cavity 41 are different, and the shrinkage and avoidance direction should be toward the shrinkage direction of the product 50. For example, in this embodiment, the product 50 is reduced as a whole, and the shrinkage and avoidance direction of the inclined roof structure located on the left side of the cavity 41 is toward the right, while the shrinkage and avoidance direction of the inclined roof structure located on the right side of the cavity 41 is toward the left.

[0046] In some optional embodiments, a relief recess 17 is formed on the ejection side and the ejected side of the lifter 10. This relief recess 17 is located between the lifter head 11 and the lifter seat 20. When the lifter seat 20 moves toward the lifter guide block 30, a relief gap is formed between the relief groove 12 and the ejection channel 42. This prevents an excessively tight fit between the lifter 10 and the ejection channel 42 in the ejection direction, thereby facilitating freer swing of the lifter under the contraction force of the product 50. In this embodiment, the depth of the relief recess 17 is approximately 0.1-0.2 mm. Of course, other suitable depths of the relief recess 17 may also be employed.

[0047] The above-mentioned mold assembly can be applied to an injection molding device, and the injection molding device includes: the above-mentioned mold assembly.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold assembly, characterized in that: include: Main body and inclined roof structure; The body is formed with a cavity and a plurality of ejection channels connected to the cavity; The inclined roof structure includes an inclined roof rod, an inclined roof seat and an inclined roof guide block; The inclined ejector rod is formed with an inclined ejector head for ejecting the product, the inclined ejector rod is rotatably engaged with the inclined ejector seat, the inclined ejector guide block is provided with a guide slot, the inclined ejector rod moves through the guide slot, and when the inclined ejector seat moves toward the inclined ejector guide block, the inclined ejector rod can rotate relative to the guide slot in an ejection direction, and the inclined ejector rod can rotate relative to the guide slot in a retraction and avoidance direction, and the ejection direction and the retraction and avoidance direction are not parallel; The inclined ejector guide block is provided on the main body, the guide groove is communicated with the ejection channel, the inclined ejector rod is movably provided in the ejection channel, the inclined ejector head is located at the side of the cavity, and the shrinkage avoidance direction is toward the cavity; The inclined ejector rod is provided with an avoidance groove on one side thereof facing the retraction avoidance direction. The avoidance groove is located between the inclined ejector head and the inclined ejector seat. When the inclined ejector seat moves toward the inclined ejector guide block, a movable gap is formed between the avoidance groove and the ejection channel for the ejector rod to rotate toward the retraction avoidance direction.

2. A mold assembly according to claim 1, characterized in that: The ejection direction is perpendicular to the shrinkage and avoidance direction.

3. The mold assembly according to claim 1, characterized in that: The inclined ejector rod is further provided with a sealing section located between the inclined ejector head and the inclined ejector seat. After the inclined ejector seat moves away from the inclined ejector guide block, the sealing section closes the ejection channel.

4. A mold assembly according to claim 3, characterized in that: The inclined ejector rod is formed with an escape groove on one side thereof facing the contraction and escape direction, the inclined ejector head, the sealing section and the escape groove are sequentially arranged in a direction close to the inclined ejector seat, and when the inclined ejector seat moves toward the inclined ejector guide block, a movable gap is formed between the escape groove and the ejection channel for the ejector rod to rotate in the contraction and escape direction; The inner wall of the avoidance groove is formed with a first transition slope gradually extending toward the sealing section.

5. The mold assembly according to claim 3, characterized in that: A contoured convex portion adapted to the shape of the product is formed in the mold cavity, the contoured convex portion is located on the side of the ejection channel, and a second transition slope is provided on the side of the inclined ejector rod facing the contoured convex portion, and the second transition slope is located between the inclined ejector head and the sealing section.

6. The mold assembly according to claim 1, characterized in that: It comprises a plurality of said inclined top structures, and the said main body is provided with a plurality of ejection channels respectively arranged on both sides of the said cavity, and the plurality of said inclined top structures are respectively arranged on both sides of the said cavity, and the inclined top rods of the said inclined top structures are movably arranged in the said ejection channels.

7. The mold assembly according to claim 1, characterized in that: The inclined ejector rod is formed with an avoidance recess on one side facing the ejection direction and on the side being ejected in the ejection direction. The avoidance recess is located between the inclined ejector head and the inclined ejector seat. When the inclined ejector seat moves toward the inclined ejector guide block, an avoidance gap is formed between the avoidance groove and the ejection channel.

8. An injection molding device, characterized in that: include: A mould assembly according to any one of claims 1 to 7.

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