Injection mold for injection molding part with inverted buckle structure

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold for an injection molding part with an inverted buckle structure. The injection mold for the injection molding part with the inverted buckle structure comprises the front mold, the rear mold and the sliding block mechanism, the sliding block mechanism comprises the sliding block and the moving assembly, the injection molding cavity is formed among the front mold, the rear mold and the sliding block, and the injection molding part can be formed after glue is injected into the injection molding cavity; the sliding block is provided with an inverted buckling space which is a part of the injection molding cavity and can form an inverted buckling rib of an injection molding part after glue injection, the moving assembly drives the sliding block to be separated from the inverted buckling rib in the first horizontal direction and then to be separated from the injection molding part in the vertical direction and the second horizontal direction in sequence, and the first horizontal direction is perpendicular to the second horizontal direction; therefore, the situation that the whole mold is relatively complex and enlarged due to the fact that a front mold inclined top structure is adopted for demolding is avoided, and the production cost of the mold is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to an injection mold for injection molded parts with an undercut structure. Background Art

[0002] In the research and development of automotive plastic interior parts, in order to meet the assembly requirements, the functional structures of injection molded products have requirements for strength and stability, so injection molded products with an undercut structure are developed. For plastic products with an undercuts, the demolding direction of the undercut part of the product is inconsistent with the mold opening direction. Usually, the front mold lifter structure is used for demolding, but there is a structure with ejection from the upper and lower surfaces of the front and rear molds, making the overall mold relatively complex and the overall mold larger, resulting in an increase in the production cost of the mold. Summary of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, the utility model provides an injection mold for injection molded parts with an undercut structure, which solves the technical problems of difficult demolding of the undercut structure and high mold cost.

[0005] (II) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0007] The embodiment of the utility model provides an injection mold for injection molded parts with an undercut structure, including a front mold and a rear mold, and further including a slider mechanism; the slider mechanism includes a moving component and two sliders, the sliders are connected to the moving component, and the moving component can be arranged on a fixed frame; the two sliders are located on the same side of the front mold, an injection cavity is formed among the front mold, the rear mold and the sliders, and an injection molded part can be formed after the injection cavity is filled with glue. An undercut space is arranged on the slider and is a part of the injection cavity, and an undercut rib of the injection molded part can be formed after injection; the moving component drives the slider to disengage from the undercut rib along a first horizontal direction and then sequentially disengage from the injection molded part along a vertical direction and a second horizontal direction; the first horizontal direction and the second horizontal direction are perpendicular.

[0008] Preferably, the moving component includes a first moving unit, a second moving unit and a third moving unit. The first moving unit and the second moving unit are both connected to the slider, and the third moving unit is connected to the second moving unit; the first moving unit is used to drive the two sliders to slide towards each other so that the slider disengages from the undercut rib along the first horizontal direction; the third moving unit is used to drive the two sliders to move along the vertical direction so that the slider moves away from the injection molded part along the vertical direction; the second moving unit is used to drive the two sliders to move along the second horizontal direction so that the slider moves away from the injection molded part along the horizontal direction.

[0009] Preferably, the first moving unit includes two driving shafts and two guiding holes formed in the front mold; the two guiding holes are arranged in one-to-one correspondence with the two driving shafts and are slidably connected, the lower ends of the two guiding holes face each other, the two driving shafts are respectively connected to the two sliders in one-to-one correspondence, and the two sliders are slidably connected to the second moving unit; when the front mold moves upward, the two driving shafts move toward each other relative to the guiding holes to drive the sliders on the driving shafts to slide toward each other along the second moving unit and then disengage from the undercut ribs along the first horizontal direction.

[0010] Preferably, the second moving unit includes a first telescopic driving member and a connecting seat; the fixed end of the first telescopic driving member is horizontally oriented on the fixing frame, the moving end of the first telescopic driving member is connected to the connecting seat, and the slider is slidably connected to the connecting seat; the moving end of the first telescopic driving member moves along the second horizontal direction to drive the slider on the connecting seat to move away from the injection molded part along the second horizontal direction.

[0011] Preferably, the second moving unit further includes a first guide rail; a first groove is formed at the bottom end of the slider, and the first groove on the slider is slidably connected to the first guide rail.

[0012] Preferably, the cross sections of the first guide rail and the first groove are both matching T-shapes.

[0013] Preferably, the third moving unit includes a second telescopic driving member and a connecting block; the fixed end of the second telescopic driving member is vertically oriented on the fixing frame, the moving end of the second telescopic driving member is connected to the connecting block, and the connecting seat is slidably connected to the connecting block; the moving end of the second telescopic driving member moves along the vertical direction to drive the connecting seat and the slider on the connecting block to move away from the injection molded part along the vertical direction.

[0014] Preferably, the third moving unit further includes two guiding columns and two guiding sleeves; the two guiding columns and the two guiding sleeves are arranged in one-to-one correspondence and are slidably connected; the two guiding columns are arranged at the lower end of the connecting block; the two guiding sleeves are arranged on the fixing frame.

[0015] Preferably, the connecting block forms a second guide rail, and a second groove is provided on the connecting seat; the second groove on the connecting seat is slidably connected to the second guide rail.

[0016] Preferably, the cross sections of the second guide rail and the second groove are both matching T-shapes.

[0017] (III) Advantageous Effects

[0018] The advantageous effects of the present utility model are:

[0019] The injection mold for injection molded parts with an undercut structure of the present utility model includes a front mold, a rear mold, and a slider mechanism. The slider mechanism includes a slider and a moving component. An injection cavity is formed between the front mold, the rear mold, and the slider. After injecting glue into the injection cavity, an injection molded part can be formed. An undercut space is provided on the slider, which is a part of the injection cavity and can form an undercut rib of the injection molded part after injecting glue. The moving component drives the slider to disengage from the undercut rib along the first horizontal direction and then sequentially disengage from the injection molded part along the vertical and the second horizontal direction. Among them, the first horizontal direction and the second horizontal direction are perpendicular, thereby avoiding the use of a front mold angled lifter structure for demolding, which makes the overall mold relatively complex and the overall mold larger, and thus reduces the production cost of the mold. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural view of the injection mold for injection molded parts with an undercut structure of the present utility model;

[0021] Figure 2 It is a schematic structural view of the slider mechanism and the injection molded part from the first perspective;

[0022] Figure 3 It is a schematic structural view of the slider mechanism and the injection molded part from the second perspective;

[0023] Figure 4 For Figure 3 It is an enlarged schematic structural view of part A in

[0024]

Description of the Reference Numerals

[0025] 1: Front mold;

[0026] 2: Rear mold;

[0027] 3: Slider mechanism; 31: Slider; 32: First moving unit; 321: Driving shaft; 322: Guide hole; 33: Second moving unit; 331: First telescopic driving member; 332: Connecting seat; 333: First guide rail; 34: Third moving unit; 341: Second telescopic driving member; 342: Connecting block; 343: Guide post; 344: Guide sleeve;

[0028] 4: Injection molded part; 41: Undercut rib. Detailed Embodiment

[0029] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific embodiments.

[0030] As Figure 1As shown in the figure, this embodiment provides an injection mold for an injection molded part 4 with an undercut structure. The injection mold includes a front mold 1, a rear mold 2, and a slider mechanism 3. Among them, the slider mechanism 3 includes a moving component and two sliders 31. The sliders 31 are connected to the moving component, and the moving component can be arranged on a fixed frame. The two sliders 31 are located on the same side of the front mold 1. An injection cavity is formed between the front mold 1, the rear mold 2, and the slider 31. After the injection cavity is filled with glue, an injection molded part 4 can be formed. The slider 31 is provided with an undercut space that is part of the injection cavity and can form an undercut rib 41 of the injection molded part 4 after injection. It should be noted that, as Figure 3 and Figure 4 shown, the undercut rib 41 is at the corner of the injection molded part 4, and the extending direction of the undercut rib 41 is the first horizontal direction, that is, perpendicular to the opening and closing direction of the front mold 1 and the rear mold 2. Among them, the fixed frame is part of an existing injection mold.

[0031] In this embodiment, the moving component drives the slider 31 to disengage from the undercut rib 41 along the first horizontal direction and then sequentially disengage from the injection molded part 4 along the vertical and the second horizontal directions. The first horizontal direction and the second horizontal direction are perpendicular. This avoids the use of an inclined ejector structure in the front mold, which makes the overall mold relatively complex and the overall mold larger, thereby reducing the production cost of the mold.

[0032] As Figure 1 shown, the moving component includes a first moving unit 32, a second moving unit 33, and a third moving unit 34. The first moving unit 32 and the second moving unit 33 are both connected to the slider 31, and the third moving unit 34 is connected to the second moving unit 33. The first moving unit 32 is used to drive the two sliders 31 to slide towards each other so that the slider 31 disengages from the undercut rib 41 along the first horizontal direction. The third moving unit 34 is used to drive the two sliders 31 to move in the vertical direction so that the slider 31 moves away from the injection molded part 4 in the vertical direction. The second moving unit 33 is used to drive the two sliders 31 to move in the second horizontal direction so that the slider 31 moves away from the injection molded part 4 in the second horizontal direction.

[0033] As Figure 2 shown, the first moving unit 32 includes two drive shafts 321 and two guide holes 322 opened in the front mold 1. The two guide holes 322 are arranged in one-to-one correspondence with the two drive shafts 321 and are slidably connected. The lower ends of the two guide holes 322 face each other. The two drive shafts 321 are respectively connected to the two sliders 31 in one-to-one correspondence, and the two sliders 31 are slidably connected to the second moving unit 33. When the front mold 1 moves upward for demolding, the two drive shafts 321 move towards each other relative to the guide holes 322 to drive the sliders 31 on the drive shafts 321 to slide towards each other along the second moving unit 33 and then disengage from the undercut rib 41 along the first horizontal direction.

[0034] As Figure 2As shown, the second moving unit 33 includes a first telescopic driving member 331 and a connecting seat 332. The fixed end of the first telescopic driving member 331 is horizontally oriented and arranged on the fixing frame and can slide up and down along the fixing frame. The moving end of the first telescopic driving member 331 is connected to the connecting seat 332. The slider 31 is slidably connected to the connecting seat 332. The moving end of the first telescopic driving member 331 moves along the second horizontal direction to drive the slider 31 on the connecting seat 332 to move away from the injection molded part 4 along the second horizontal direction.

[0035] To facilitate the sliding connection between the slider 31 and the second moving unit 33, the second moving unit 33 further includes a first guide rail 333. A first groove is formed at the bottom end of the slider 31, and the first groove on the slider 31 is slidably connected to the first guide rail 333. To improve the sliding stability between the slider 31 and the second moving unit 33, the cross-sections of both the first guide rail 333 and the first groove are matching T-shapes.

[0036] As Figure 2 shown, the third moving unit 34 includes a second telescopic driving member 341 and a connecting block 342. The fixed end of the second telescopic driving member 341 is vertically oriented and arranged on the fixing frame. The moving end of the second telescopic driving member 341 is connected to the connecting block 342. The connecting seat 332 is slidably connected to the connecting block 342. The moving end of the second telescopic driving member 341 moves along the vertical direction to drive the connecting seat 332 on the connecting block 342 and the slider 31 on the connecting block 342 to move away from the injection molded part 4 along the vertical direction.

[0037] To improve the stability when the third moving unit 34 extends and retracts, the third moving unit 34 further includes two guide posts 343 and two guide sleeves 344. The two guide posts 343 and the two guide sleeves 344 are arranged in one-to-one correspondence and are slidably connected. The two guide posts 343 are arranged at the lower end of the connecting block 342, and the two guide sleeves 344 are arranged on the fixing frame.

[0038] As Figure 2 shown, in this embodiment, the connecting block 342 forms a second guide rail, and a second groove is provided on the connecting seat 332. The second groove on the connecting seat 332 is slidably connected to the second guide rail. The cross-sections of both the second guide rail and the second groove are matching T-shapes.

[0039] Working principle: When the current mold 1 moves upward for demolding, the two drive shafts 321 in the first moving unit 32 move towards each other relative to the guiding holes 322 to drive the sliders 31 on the drive shafts 321 to slide towards each other along the first guide rails 333 on the second moving unit 33, and then the two sliders 31 disengage from the undercut ribs 41 along the first horizontal direction. Then, the moving end of the second telescopic driving member 341 in the third moving unit 34 moves vertically to drive the connecting seat 332 on the second moving unit 33 on the connecting block 342 and the sliders 31 on the connecting block 342 to move vertically away from the injection molded part 4. Finally, the moving end of the first telescopic driving member 331 in the second moving unit 33 moves along the second horizontal direction to drive the connecting seat 332 and the connecting block 342 in the third moving unit 34 to move along the second horizontal direction, thereby driving the sliders 31 on the connecting seat 332 away from the injection molded part 4.

[0040] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0043] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0044] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. An injection mold for an injection molded part with an undercut structure, comprising a front mold (1) and a rear mold (2), characterized in that: It also includes a slider mechanism (3); The slider mechanism (3) comprises a moving assembly and two sliders (31), wherein the sliders (31) are connected to the moving assembly, and the moving assembly can be arranged on a fixed frame; The two sliders (31) are located on the same side of the front mold (1); an injection cavity is formed between the front mold (1), the rear mold (2) and the sliders (31); the injection cavity can form an injection molded part (4) after glue is injected; an undercut space is provided on the slider (31); the undercut rib (41) is a part of the injection cavity and can form the injection molded part (4) after glue is injected; The moving assembly drives the slider (31) to separate from the undercut rib (41) along a first horizontal direction and then to separate from the injection molded part (4) in sequence along a vertical direction and a second horizontal direction; The first horizontal direction is perpendicular to the second horizontal direction.

2. The injection mold for an injection molded part with an undercut structure according to claim 1, characterized in that: The moving assembly comprises a first moving unit (32), a second moving unit (33) and a third moving unit (34); the first moving unit (32) and the second moving unit (33) are both connected to the slider (31); and the third moving unit (34) is connected to the second moving unit (33); The first moving unit (32) is used to drive the two sliders (31) to slide towards each other so that the sliders (31) are separated from the undercut rib (41) along the first horizontal direction; The third moving unit (34) is used to drive the two sliders (31) to move in a vertical direction so that the sliders (31) are moved away from the injection molded part (4) in the vertical direction; The second moving unit (33) is used to drive the two sliders (31) to move in a horizontal direction so that the sliders (31) move away from the injection molded part (4) along the second horizontal direction.

3. The injection mold for an injection molded part with an undercut structure as claimed in claim 2, characterized in that: The first moving unit (32) comprises two driving shafts (321) and two guide holes (322) opened in the front mold (1); The two guide holes (322) are arranged in one-to-one correspondence with the two drive shafts (321) and are slidably connected, the lower ends of the two guide holes (322) are arranged facing each other, the two drive shafts (321) are respectively connected in one-to-one correspondence with the two sliders (31), and the two sliders (31) are slidably connected with the second moving unit (33); When the front mold (1) moves upward, the two driving shafts (321) move toward each other relative to the guide holes (322) to drive the sliders (31) on the driving shafts (321) to slide toward each other along the second moving unit (33) and then disengage from the undercut rib (41) along the first horizontal direction.

4. The injection mold for an injection molded part with an undercut structure as claimed in claim 3, characterized in that: The second moving unit (33) comprises a first telescopic driving member (331) and a connecting seat (332); The fixed end of the first telescopic driving member (331) is horizontally oriented and arranged on the fixed frame, the movable end of the first telescopic driving member (331) is connected to the connecting seat (332), and the sliding block (31) is slidably connected to the connecting seat (332); The movable end of the first telescopic driving member (331) moves in a horizontal direction to drive the sliding block (31) on the connecting seat (332) to move away from the injection molded part (4) along the second horizontal direction.

5. The injection mold for an injection molded part with an undercut structure according to claim 4, characterized in that: The second moving unit (33) further comprises a first guide rail (333); A first groove is formed at the bottom end of the sliding block (31), and the first groove on the sliding block (31) is slidably connected to the first guide rail (333).

6. The injection mold for an injection molded part with an undercut structure according to claim 5, characterized in that: The cross-sections of the first guide rail (333) and the first groove are both matched T-shaped.

7. The injection mold for an injection molded part with an undercut structure according to claim 4, characterized in that: The third moving unit (34) comprises a second telescopic driving member (341) and a connecting block (342); The fixed end of the second telescopic driving member (341) is vertically oriented and arranged on the fixed frame, the movable end of the second telescopic driving member (341) is slidably connected to the connecting block (342), and the connecting seat (332) is slidably connected to the connecting block (342); The movable end of the second telescopic driving member (341) moves in the vertical direction to drive the connecting seat (332) on the connecting block (342) and the sliding block (31) to move away from the injection molded part (4) in the vertical direction.

8. The injection mold for an injection molded part with an undercut structure according to claim 7, characterized in that: The third moving unit (34) further comprises two guide posts (343) and two guide sleeves (344); The two guide posts (343) and the two guide sleeves (344) are arranged in one-to-one correspondence and are slidably connected; The two guide posts (343) are arranged at the lower end of the connecting block (342); The two guide sleeves (344) are arranged on the fixing frame.

9. The injection mold for an injection molded part with an undercut structure according to claim 7, characterized in that: The connecting block (342) forms a second guide rail, and the connecting seat (332) is provided with a second groove; The second groove on the connecting seat (332) is slidably connected to the second guide rail.

10. The injection mold for an injection molded part with an undercut structure according to claim 9, characterized in that: The cross sections of the second guide rail and the second groove are both matched T-shaped.

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