Mold core assembly and injection mold

Abstract

The mold core assembly is installed on the injection mold and used for injection molding of a product with a cross beam rib on the inner side wall, the mold core assembly comprises a mold core and a pitched roof mechanism installed on the mold core, the mold core is provided with a pitched roof hole penetrating through the mold core, and the pitched roof mechanism is arranged in the pitched roof hole. The inclined ejection mechanism comprises an inclined ejection piece and an inclined ejection rod connected with the inclined ejection piece, the inclined ejection piece comprises an inclined ejection column and an inclined ejection block, the inclined ejection column is arranged in the inclined ejection hole, an included angle is formed between the axis of the inclined ejection column and the axis of the inclined ejection rod, the included angle is 5 degrees, the mold core is provided with a convex part corresponding to the cross beam rib, and the inclined ejection block is provided with a concave part corresponding to the cross beam rib. The cross beam rib is formed in the concave part around the convex part; when the injection mold is changed into a mold opening state, the inclined ejector rod pushes the inclined ejector piece to drive the product to move upwards so that the cross beam rib can be separated from the protruding part, meanwhile, the inclined ejector block horizontally moves inwards so that the cross beam rib can be separated from the concave part, and demolding of the product is completed.

Description

Technical Field

[0001] The utility model relates to the field of plastic product injection molding, in particular to a mold core component and an injection mold. Background Art

[0002] Among the existing consumer electronic products, plastic products are very popular. As people pay more attention to product quality, they have higher and higher requirements for product size, appearance and sealing. Therefore, higher product requirements also make the design of injection molds more stringent and demanding.

[0003] In order to meet the design requirements, existing products, such as mobile phone middle frames, are designed with cross beams on the inner wall of the mobile phone middle frame for engagement with the docking structure. However, due to the internal space requirements, the cross beams are designed to be very thin. When the existing injection mold is opened, they are easily deformed or even scrapped, resulting in a very low yield rate of the injected product, which greatly troubles the designers of the injection mold industry.

[0004] Therefore, the injection mold industry is in urgent need of developing a new structure to solve the above problems. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a mold core assembly and an injection mold which have a simple structure and can effectively solve the problem of product deformation during the mold opening process.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a mold core assembly, which is installed on an injection mold and is used for injection molding a product with a cross beam rib on the inner side wall. It includes a mold core and a tilting mechanism installed on the mold core, the mold core is provided with a tilting hole that runs through the upper and lower surfaces of the mold core, the tilting mechanism is movably arranged in the tilting hole, the tilting mechanism includes a tilting piece, a tilting rod movably connected to the tilting piece, the tilting piece includes a tilting column and a tilting block arranged at the upper end of the tilting column, the tilting column is movably arranged in the tilting hole, the axis of the tilting column and the axis of the tilting rod form an angle of 5°, the mold core is convexly provided with a protrusion corresponding to the cross beam rib of the product, and the tilting block is concavely provided with a recessed portion corresponding to the cross beam rib of the product,

[0007] When the injection mold is in a closed mold state, the protrusion is accommodated in the recessed portion, and the cross-beam rib is formed around the protrusion in the recessed portion; when the injection mold changes from a closed mold state to an open mold state, the inclined ejector rod pushes the inclined ejector member to drive the product to move upward so that the cross-beam rib is separated from the protrusion, and at the same time the inclined ejector block moves horizontally inward to separate the cross-beam rib from the recessed portion, and the product is demolded.

[0008] Furthermore, the mold core assembly also includes a stop column, the inclined lift column is provided with a movable groove corresponding to the stop column, the stop column is movably arranged in the movable groove, and the stop column and the inclined lift column move relatively in the horizontal direction.

[0009] Furthermore, the axis of the inclined ejector column and the axis of the stop column form an angle of 5°.

[0010] Furthermore, the stop column is provided with an abutment top portion protruding outwardly, and when the injection mold changes from a mold closing state to a mold opening state, the abutment top portion abuts against the inner side wall of the product to separate the crossbeam rib from the recessed portion.

[0011] Furthermore, the movable groove of the inclined top column is concavely provided with a guide groove connected with the movable groove, and the stop column is convexly provided with a guide block corresponding to the guide groove, and the guide block moves along the guide groove.

[0012] Furthermore, the thickness of the two side walls of the stop column located on the same horizontal line is greater than or equal to half the thickness of the two side walls of the inclined top column.

[0013] Furthermore, a first connection portion is provided at the lower end of the inclined lift column, and the inclined lift rod is provided with a second connection portion movably connected to the first connection portion of the inclined lift column.

[0014] Furthermore, the first connecting portion and the second connecting portion move relatively along a horizontal direction.

[0015] Further, the first connecting portion includes a first clamping portion and a first clamping portion, the second connecting portion includes a second clamping portion and a second clamping portion, the first clamping portion is movably disposed in the second clamping portion, and the second clamping portion is movably disposed in the first clamping portion.

[0016] An injection mold comprises the above-mentioned mold core assembly, the injection mold further comprising an upper mold and a lower mold, the lower mold comprising a lower mold plate, a lower mold connecting plate and a lower mold fixing plate arranged in sequence from top to bottom, and an ejector plate arranged between the lower mold plate and the lower mold fixing plate, the lower end of the inclined ejector rod is connected to the ejector plate, and when the injection mold is opened, the ejector plate pushes the inclined ejector rod to drive the inclined ejector mechanism to actuate to complete the demoulding of the product.

[0017] The mold core assembly and the injection mold provided by the utility model not only have a simple structure, but also can effectively solve the problem of deformation of the product during the mold opening process, thereby greatly improving the yield rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The utility model is a three-dimensional diagram of an injection mold.

[0020] Figure 2 for Figure 1 A cross-sectional view of an injection mold is shown.

[0021] Figure 3 It is a three-dimensional diagram of a mold core component of the utility model.

[0022] Figure 4 for Figure 3 A partial enlarged view of A of a mold core assembly is shown.

[0023] Figure 5 The utility model is a three-dimensional diagram of a mold core of a mold core assembly.

[0024] Figure 6 It is a three-dimensional exploded view of a tilting lift mechanism of a mold core assembly of the utility model.

[0025] Figure 7 for Figure 6 A front view of the assembly structure of a tilting mechanism of a mold core assembly is shown.

[0026] Figure 8 for Figure 7 A partial enlarged view of location B of a tilted lift mechanism of a mold core assembly is shown.

[0027] Fig. 9 for Figure 6 A side view of the assembly structure of a tilting mechanism of a mold core assembly is shown.

[0028] Fig.10 for Fig. 9 An exploded view of a tilting mechanism of a mold core assembly is shown.

[0029] Fig.11 It is a side view of a tilting lift mechanism of a mold core assembly of the utility model.

[0030] Fig.12 for Fig.11 A front view of a tilting mechanism of a mold core assembly is shown.

[0031] Fig.13 It is a three-dimensional diagram of the injection-molded product of the utility model.

[0032] Fig.14 for Fig.13 An enlarged view of a portion of the product shown. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0035] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0036] See also Figure 1-Figure 14 The utility model discloses a mold core assembly and an injection mold, wherein the mold core assembly is mounted on the injection mold and is used for injection molding a product 100 having a cross beam rib 101 on the inner side wall. The cross beam rib 101 of the product 100 is slender, weak, and has a hooking structure (please refer to Fig.14 In order to prevent the crossbeam rib 101 from being deformed during the opening process of the injection mold, thereby causing the product 100 to have poor dimensions, the mold core assembly and the injection mold of the utility model are developed to solve the above problem, thereby greatly improving the yield of the product 100.

[0037] See also Figure 2-Figure 5 The mold core assembly includes a mold core 10 and a tilting mechanism 20 installed on the mold core 10. Furthermore, the mold core 10 is provided with a tilting hole 11 penetrating the upper and lower surfaces of the mold core 10. The tilting mechanism 20 is movably arranged in the tilting hole 11. The tilting mechanism 20 further includes a tilting member 21 and a tilting rod 23 movably connected to the tilting member 21.

[0038] See also Figure 6-Figure 12The lift member 21 includes a lift column 211 and a lift block 212 disposed at the upper end of the lift column 211. The lift column 211 is movably disposed in the lift hole 11. The axis A1 of the lift column 211 and the axis A2 of the lift rod 23 form an angle α, and the angle α is 5°. The mold core 10 is provided with a protrusion 12 corresponding to the cross beam rib 101 of the product 100. The lift block 212 is provided with a recessed portion 2121 corresponding to the cross beam rib 101 of the product 100.

[0039] When the injection mold of the utility model is in the mold closing state, the protrusion 12 is accommodated in the recessed portion 2121. The cross beam rib 101 is formed in the recessed portion 2121 around the protrusion 12; when the injection mold is changed from the mold closing state to the mold opening state, the inclined ejector rod 23 pushes the inclined ejector 21 to drive the product 100 to move upward to make the cross beam rib 101 separate from the protrusion 12, and at the same time, the inclined ejector block 212 moves horizontally inward to make the cross beam rib 101 separate from the recessed portion 2121, and the product 100 is successfully demolded.

[0040] Please continue reading Figure 6-Figure 12 The mold core assembly further includes a stop post 22. The inclined ejector post 211 is provided with a movable groove 2111 corresponding to the stop post 22. The stop post 22 is movably arranged in the movable groove 2111, and the stop post 22 and the inclined ejector post 211 move relative to each other in the horizontal direction.

[0041] See also Fig. 9 Furthermore, the axis A1 of the inclined ejector column 211 and the axis A3 of the stop column 22 form an angle β, and the angle β is 5°.

[0042] See also Figure 6 and Figure 7 The upper end of the stop column 22 is provided with an abutment portion 221 protruding outward. When the injection mold changes from a mold closing state to a mold opening state, the abutment portion 221 abuts against the inner wall of the product 100 to separate the crossbeam rib 101 from the recessed portion 2121.

[0043] Furthermore, the movable groove 2111 of the inclined top column 211 is provided with guide grooves 2112 in both side walls thereof, which are connected with the movable groove 2111. The stop column 22 is provided with guide blocks 222 corresponding to the guide grooves 2112. The guide blocks 222 move along the guide grooves 2112. In this embodiment, the guide blocks 222 move relatively horizontally along the guide grooves 2112.

[0044] See also Fig.10More specifically, the thickness D2 of the two side walls of the stop column 22 located on the same horizontal line is greater than or equal to half of the thickness D1 of the two side walls of the inclined ejector column 211, so as to ensure that the stop column 22 is fully or partially retained in the movable groove 2111 of the inclined ejector column 211 regardless of whether the mold is in the open mold state or the closed mold state.

[0045] See also Figure 6-Figure 7 and Fig.12 The lower end of the inclined ejector column 211 is provided with a first connecting portion 213, and the inclined ejector rod 23 is provided with a second connecting portion 231 movably connected to the first connecting portion 213 of the inclined ejector column 211. The first connecting portion 213 includes a first clamping portion and a first clamping portion. The second connecting portion includes a second clamping portion and a second clamping portion. The first clamping portion is movably arranged in the second clamping portion, and the second clamping portion is movably arranged in the first clamping portion. In this embodiment, the first connecting portion 213 and the second connecting portion 231 move relative to each other in the horizontal direction.

[0046] See also Figure 1 and Figure 2 The injection mold provided by the present invention includes the above-mentioned mold core assembly. The injection mold also includes an upper mold and a lower mold, and the lower mold further includes a lower mold plate 30, a lower mold connecting plate 40 and a lower mold fixing plate 50 arranged in sequence from top to bottom, and an ejector plate 60 arranged between the lower mold plate 30 and the lower mold fixing plate 50. The lower end of the inclined ejector rod 23 is provided with a connecting end 232, and the connecting end 232 of the inclined ejector rod 23 is connected to the ejector plate 60. When the injection mold is opened, the ejector plate 60 pushes the inclined ejector rod 23 to drive the inclined ejector mechanism 20 to actuate to complete the demoulding of the product 100.

[0047] The mold core assembly and the injection mold provided by the utility model are not only simple in structure, but also can effectively solve the problem of deformation of the product 100 during the mold opening process, thereby greatly improving the yield rate of the product 100.

[0048] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A mold core assembly, mounted on an injection mold, for injection molding a product having a crossbeam rib on the inner side wall, comprising a mold core and a tilting mechanism mounted on the mold core, characterized in that: The mold core is provided with an inclined top hole penetrating the upper and lower surfaces of the mold core, the inclined top mechanism is movably arranged in the inclined top hole, the inclined top mechanism includes an inclined top piece, an inclined top rod movably connected to the inclined top piece, the inclined top piece includes an inclined top column and an inclined top block arranged at the upper end of the inclined top column, the inclined top column is movably arranged in the inclined top hole, the axis of the inclined top column and the axis of the inclined top rod form an angle of 5°, the mold core is convexly provided with a protrusion corresponding to the cross beam rib of the product, and the inclined top block is concavely provided with a concave portion corresponding to the cross beam rib of the product, When the injection mold is in a closed mold state, the protrusion is accommodated in the recessed portion, and the cross-beam rib is formed around the protrusion in the recessed portion; when the injection mold changes from a closed mold state to an open mold state, the inclined ejector rod pushes the inclined ejector member to drive the product to move upward so that the cross-beam rib is separated from the protrusion, and at the same time the inclined ejector block moves horizontally inward to separate the cross-beam rib from the recessed portion, and the product is demolded.

2. A mold core assembly according to claim 1, characterized in that: The mold core assembly also includes a stop column, the inclined ejector column is provided with a movable groove corresponding to the stop column, the stop column is movably arranged in the movable groove, and the stop column and the inclined ejector column move relatively in the horizontal direction.

3. A mold core assembly as claimed in claim 2, characterized in that: The axis of the inclined ejector column and the axis of the stop column form an angle of 5°.

4. A mold core assembly as claimed in claim 2, characterized in that: The stop column is provided with an abutment top portion protruding outwardly. When the injection mold changes from a mold closing state to a mold opening state, the abutment top portion abuts against the inner side wall of the product to separate the crossbeam rib from the recessed portion.

5. A mold core assembly as claimed in claim 2, characterized in that: The movable groove of the inclined top column is concavely provided with a guide groove connected with the movable groove, and the stop column is convexly provided with a guide block corresponding to the guide groove, and the guide block moves along the guide groove.

6. A mold core assembly as claimed in claim 2, characterized in that: The thickness of the two side walls of the stop column located on the same horizontal line is greater than or equal to half the thickness of the two side walls of the inclined top column.

7. A mold core assembly according to claim 1, characterized in that: A first connection portion is provided at the lower end of the inclined lift column, and the inclined lift rod is provided with a second connection portion movably connected to the first connection portion of the inclined lift column.

8. A mold core assembly as claimed in claim 7, characterized in that: The first connecting portion and the second connecting portion move relatively along a horizontal direction.

9. A mold core assembly according to claim 7, characterized in that: The first connecting portion includes a first clamping portion and a first clamping portion, the second connecting portion includes a second clamping portion and a second clamping portion, the first clamping portion is movably disposed in the second clamping portion, and the second clamping portion is movably disposed in the first clamping portion.

10. An injection mold, comprising the mold core assembly according to any one of claims 1 to 9, characterized in that: The injection mold also includes an upper mold and a lower mold, the lower mold includes a lower mold plate, a lower mold connecting plate and a lower mold fixing plate arranged in sequence from top to bottom, and a pin plate arranged between the lower mold plate and the lower mold fixing plate, the lower end of the inclined ejector rod is connected to the ejector plate, and when the injection mold is opened, the ejector plate pushes the inclined ejector rod to drive the inclined ejector mechanism to actuate to complete the demoulding of the product.

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