Inclined top and keyboard bracket demolding auxiliary structure

By designing a molding groove formed by the movable piece and the working part on the inclined ejector, the problem of the keyboard bracket buckle sticking to the inclined ejector is solved, realizing an efficient demolding process and improving the injection molding yield.

CN223604929UActive Publication Date: 2025-11-28HENAN LETONG YUANDEFU INFORMATION TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202423010583.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-06
Publication Date
2025-11-28
Estimated Expiration
2034-12-06

AI Technical Summary

Technical Problem

The keyboard tray clips are prone to sticking to the inner wall of the molding groove of the slanted top during the casting process, which leads to a decrease in injection molding yield.

Method used

Design a demolding auxiliary structure for a slanted ejector and keyboard bracket. The movable piece and the working part together form a molding groove. When the slanted ejector is ejected, the movable piece is separated from the workpiece by a snap-fit, which reduces the adhesion force between the snap-fit ​​and the slanted ejector and avoids sticking to the mold.

Benefits of technology

This improves the yield rate of injection molding, ensures that the clips can be easily demolded, and avoids the occurrence of mold sticking.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223604929U_ABST
    Figure CN223604929U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of injection molds, in particular to a pitched roof and keyboard bracket demolding auxiliary structure which comprises a working part and a stress rod, the working part is fixedly connected to one end of the stress rod, one side of the working part is a working face, the end face of the end, away from the stress rod, of the working part is an ejection face, and an included angle is formed between the ejection face and the working face. The working part is provided with a forming groove used for workpiece forming, an opening of the forming groove is located on the working face, the pitched roof is provided with an installation hole and a pin shaft, the installation hole is formed in the pitched roof and penetrates through the two sides of the pitched roof, the two parts of the installation hole are located on the working part and the stress rod respectively, and the installation hole is communicated with the forming groove. According to the embodiment of the invention, the movable piece and the working part jointly define the forming groove for forming the workpiece buckle, and when the inclined ejector is ejected out, the movable piece and the working part are separated from the workpiece buckle, so that the bonding force between the buckle and the inclined ejector is reduced when the inclined ejector is separated from the buckle, the buckle is prevented from sticking to a mold, and the injection molding yield is improved.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of injection molds, in particular to a slanted ejection pin and a keyboard bracket demolding auxiliary structure. BACKGROUND

[0002] When the buckle of the keyboard bracket is cast formed, a slanted ejection pin needs to be used for auxiliary forming. In the process of use, the end face of the buckle far from the bracket is easy to be adhered to the inner wall of the forming groove of the slanted ejection pin, thereby reducing the yield of injection. SUMMARY

[0003] In view of the defects in the prior art, the application provides a slanted ejection pin and a keyboard bracket demolding auxiliary structure. In the embodiment of the application, the movable piece and the working part jointly enclose a forming groove for buckle forming of a workpiece. When the slanted ejection pin is ejected, the movable piece and the working part are distributed away from the buckle of the workpiece, thereby reducing the adhesion force between the buckle and the slanted ejection pin when the slanted ejection pin is separated from the buckle, avoiding the adhesion of the buckle to the mold, and improving the yield of injection.

[0004] The above application purpose of the application is realized through the following technical scheme:

[0005] A slanted ejection pin comprises a working part and a stress rod, the working part is fixedly connected to one end of the stress rod, one side of the working part is a working face, the end face of the working part far from the stress rod is an ejection face, the ejection face and the working face have an included angle, a forming groove for workpiece forming is arranged on the working part, and the opening of the forming groove is located on the working face;

[0006] The slanted ejection pin is provided with a mounting hole and a pin shaft, the mounting hole is arranged on the slanted ejection pin, the mounting hole penetrates through the two sides of the slanted ejection pin, the two parts of the mounting hole are located on the working part and the stress rod respectively, the mounting hole is communicated with the forming groove, and the pin shaft is inserted into the slanted ejection pin through the mounting hole;

[0007] The mounting hole is provided with a movable piece, a long hole is arranged in the middle part of the movable piece, in the assembled state, the pin shaft of the movable piece is inserted into the long hole, the movable piece can translate in the mounting hole, one end of the movable piece located in the working part is a working end, the side of the working end close to the working face is protruded in the direction close to the working face to form a protrusion, the end face of the protrusion close to the working part is coplanar with the inner side face of the forming groove close to the protrusion, and the side of the working end close to the working face is coplanar with the inner side face of the forming groove close to the working end.

[0008] Optionally, the working end and the end far from the working end of the movable piece are respectively attached to the two ends of the inner cavity of the mounting hole, and the inner wall of the mounting hole limits the movement track of the movable piece.

[0009] Optionally, in the assembled state, the pin shaft is located at the end of the long hole close to the protrusion, and the side of the movable piece far from the protrusion is stretched out of the mounting hole.

[0010] The keyboard bracket demolding auxiliary structure comprises a mold core and the inclined ejector of any one of the preceding.

[0011] The mold core is provided with a through hole for the extension and entry of the inclined ejector stress rod, an injection cavity and a working cavity for the entry of the working part are formed at one end of the mold core, the through hole is in communication with the injection cavity and the working cavity, and the end of the through hole close to the working cavity is provided with a limiting channel for limiting the movement track of the movable piece, the limiting channel is in close contact with the side of the movable piece close to the working surface and the side away from the working surface.

[0012] In the assembled state, the pin shaft is located at the end of the long hole close to the protrusion, the side of the movable piece away from the pin shaft is in close contact with the inner side of the limiting channel, and the cavity formed by the working surface of the working part and the side of the working cavity is in communication with the injection cavity and the forming groove to form a forming cavity for injection molding.

[0013] Optionally, the mold core is provided with a limiting part at the junction of the working cavity and the limiting channel, and in the assembled state, the side surface of the protrusion away from the working part is in close contact with the side surface of the limiting part close to the working cavity, and the side of the movable piece close to the working surface is in close contact with the side of the limiting part close to the limiting channel.

[0014] In summary, the present application has the following beneficial technical effects:

[0015] In the embodiment of the present application, the movable piece and the working part jointly form a forming groove for the buckle forming of the workpiece, and when the inclined ejector is ejected, the movable piece and the working part are distributed away from the buckle of the workpiece, thereby reducing the adhesion between the buckle and the inclined ejector when the inclined ejector is separated from the buckle, avoiding the adhesion of the buckle to the mold, and improving the yield of injection molding. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is an assembly schematic diagram of the inclined ejector of the present application;

[0017] Figure 2 is an exploded schematic diagram of the inclined ejector of the present application;

[0018] Figure 3 is a side view schematic diagram of the inclined ejector of the present application in the assembled state;

[0019] Figure 4 is a cross-sectional schematic diagram of the inclined ejector of the present application in the assembled state;

[0020] Figure 5 is a movement schematic diagram of the inclined ejector of the present application;

[0021] Figure 6 is a mold core cross-sectional schematic diagram of the keyboard bracket demolding auxiliary structure of the present application;

[0022] Figure 7 is an assembly schematic diagram of the keyboard bracket demolding auxiliary structure of the present application.

[0023] Reference signs: 10, working part; 11, working surface; 12, ejection surface; 13, forming groove;

[0024] 20, stress rod;

[0025] 30, mounting hole; 31, pin shaft;

[0026] 40, movable piece; 41, long hole; 42, working end; 43, protrusion;

[0027] 50, mold core; 51, forming cavity; 52, through hole; 53, injection cavity; 54, working cavity; 55, limiting channel; 56, limiting part. DETAILED DESCRIPTION

[0028] The application will be further described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the application provides a bevel ejector, referring to the accompanying drawings Figure 1 - the accompanying drawings Figure 5 , including a working part 10 and a stress rod 20, the working part 10 is fixedly connected to one end of the stress rod 20, one side of the working part 10 is a working surface 11, and an end surface of the working part 10 away from the stress rod 20 is an ejection surface 12; the ejection surface 12 and the working surface 11 have an included angle therebetween; a forming groove 13 for forming a workpiece is arranged on the working part 10; and an opening of the forming groove 13 is located on the working surface 11.

[0030] The bevel ejector is provided with a mounting hole 30 and a pin shaft 31; in order to facilitate description, a central axis of a connecting rod of a buckle in an injection process is taken as a reference axis; a central axis of the working part 10 of the bevel ejector is parallel to the reference axis; a central axis of the stress rod 20 of the bevel ejector has an included angle with the reference axis; a direction in which the buckle is separated from the mold along the reference axis is a positive direction; a direction in which the working part 10 is separated from the buckle is a vector sum of the positive direction and a certain direction perpendicular to the positive direction; the mounting hole 30 is arranged on the bevel ejector; the mounting hole 30 penetrates through two sides of the bevel ejector; two parts of the mounting hole 30 are respectively located on the working part 10 and the stress rod 20; the mounting hole 30 is in communication with the forming groove 13; and the pin shaft 31 is inserted into the bevel ejector through the mounting hole 30.

[0031] A movable piece 40 is arranged in the mounting hole 30, a long hole 41 is formed in the middle of the movable piece 40, in the assembled state, the pin shaft 31 of the movable piece 40 is inserted into the long hole 41, the movable piece 40 can move in the mounting hole 30 in the direction perpendicular to the reference axis, one end of the movable piece 40 in the working part 10 is a working end 42, the working end 42 blocks the opening of the forming groove 13 caused by the mounting hole 30 close to one end of the forming groove 13, the side of the working end 42 close to the working surface 11 protrudes in the direction close to the working surface 11 to form a protrusion 43, the end face of the protrusion 43 close to the working part 10 is coplanar with the inner side face of the forming groove 13 close to the protrusion 43, the side of the working end 42 close to the working surface 11 is coplanar with the inner side face of the forming groove 13 close to the working end 42.

[0032] The specific use scenarios will be further introduced below.

[0033] In use, the inclined ejector is placed in the mold, the working surface 11 of the working part 10 of the inclined ejector forms a forming cavity 51 with the inner side face of the mold, then the injection molding and solidification are completed, when demolding, the stress rod 20 of the inclined ejector is obliquely ejected in the direction oblique to the reference axis, the ejection surface 12 of the working part 10 presses the workpiece to separate from the cavity, when the inclined ejector is ejected, the working part 10 is ejected from the mold in the direction oblique to the reference axis and away from the buckle of the workpiece, in this process, since the movable piece 40 can move in the direction perpendicular to the reference axis in the inclined ejector, the working part 10 first separates from the buckle of the workpiece, the movable piece 40 keeps the relative position with the buckle of the workpiece, when the pin shaft 31 moves to the other end of the long hole 41, the pin shaft 31 drives the movable piece 40 to separate from the buckle of the workpiece.

[0034] It can be found that in the embodiment of the present application, the movable piece 40 and the working part 10 jointly enclose the forming groove 13 for forming the buckle of the workpiece, when the inclined ejector is ejected, the movable piece 40 and the working part 10 separate from the buckle of the workpiece, thereby reducing the adhesion between the buckle and the inclined ejector when the inclined ejector separates from the buckle, avoiding the buckle sticking to the mold, and improving the yield of injection molding.

[0035] In the embodiment of the present application, the working end 42 of the movable piece 40 and the end away from the working end 42 are respectively attached to the two ends of the inner cavity of the mounting hole 30, the two ends of the inner cavity herein should be understood as the two ends of the inner cavity of the mounting hole 30 of the inclined ejector close to the working part 10 and the stress rod 20, the inner wall of the mounting hole 30 limits the movement track of the movable piece 40, so that the movable piece 40 can only move in the limited direction perpendicular to the reference axis, thereby the movable piece 40 can keep the relative position with the buckle of the workpiece when the inclined ejector is ejected, so that the inclined ejector can smoothly demold from the buckle without adhesion, in the assembled state, the pin shaft 31 is located at the end of the long hole 41 close to the protrusion 43, the side of the movable piece 40 away from the protrusion 43 protrudes out of the mounting hole 30, the side of the movable piece 40 protruding out of the mounting hole 30 can be used to control the relative position of the movable piece 40 with the inclined ejector when the inclined ejector is ejected.

[0036] The embodiment of the present application also provides a keyboard bracket demolding auxiliary structure, referring to the drawings Figure 6 and the drawings Figure 7 , comprising a mold core 50 and the aforementioned inclined ejection rod;

[0037] The mold core 50 is provided with a through hole 52 for the extension and entry of the inclined ejection rod 20, one end of the mold core 50 is provided with an injection cavity 53 and a working cavity 54 for the entry of the working part 10, the through hole 52 is in communication with the injection cavity 53 and the working cavity 54, one end of the through hole 52 close to the working cavity 54 is provided with a limiting channel 55 for limiting the movement track of the movable piece 40, the limiting channel 55 is in close contact with the side of the movable piece 40 close to the working surface 11 and the side of the movable piece 40 far away from the working surface 11;

[0038] In the assembled state, the pin shaft 31 is located at one end of the long hole 41 close to the protrusion 43, the side of the movable piece 40 far away from the pin shaft 31 is in close contact with the inner side of the limiting channel 55, and the cavity formed by the working surface 11 of the working part 10 and the side of the working cavity 54 constitutes a molding cavity 51 for injection molding together with the injection cavity 53 and the molding groove 13.

[0039] In use, the stress rod 20 is located in the through hole 52, the working part 10 is located in the working cavity 54, and the cavity formed by the working surface 11 of the working part 10 and the side of the working cavity 54 constitutes a continuous molding cavity 51 for injection molding together with the injection cavity 53 and the molding groove 13.

[0040] After the injection is completed, the stress rod 20 is ejected in a direction inclined to the reference axis, in this process, the movable piece 40 moves in the limiting channel 55 in a direction parallel to the reference axis, keeps the relative position with the workpiece buckle, and the working part 10 starts to separate from the workpiece buckle, after the movable piece 40 leaves the limiting channel 55, the movable piece 40 also leaves the buckle in a direction inclined to the reference axis under the driving of the inclined ejection and the pin shaft 31, forming the batch separation from the buckle, preventing the buckle from sticking to the mold.

[0041] In some possible implementation manners of the embodiments of the present application, the die 50 has a limiting portion 56 at the junction of the working cavity 54 and the limiting channel 55, in the assembled state, the convex portion 43 is close to the side surface of the limiting portion 56 which is close to the working cavity 54, and the side of the movable piece 40 close to the working surface 11 is close to the side of the limiting portion 56 close to the limiting channel 55, the relative position of the movable piece 40 in the assembled state is limited by the limiting portion 56, so that the auxiliary structure can have a stable forming cavity 51 when injection molding is performed, of course, a convex step can also be arranged on the side of the through hole 52 away from the aforementioned limiting portion 56, and the movable piece 40 is provided with chamfers on both sides of one end of the stress rod 20, so that the edges of the two limiting portions 56 can constrain the initial position of the movable piece 40 through the chamfers on both sides of the movable piece 40 when the inclined top is reset.

[0042] The embodiments of the present application are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A slanted ejector, comprising a working part (10) and a stress rod (20), the working part (10) being fixedly connected to one end of the stress rod (20), one side of the working part (10) being a working surface (11), the end surface of the working part (10) away from the stress rod (20) being an ejecting surface (12), the ejecting surface (12) and the working surface (11) having an included angle therebetween, a forming groove (13) for forming a workpiece being formed in the working part (10), the opening of the forming groove (13) being located on the working surface (11), characterized in that, a mounting hole (30) and a pin shaft (31) are arranged on the slanted ejector, the mounting hole (30) being formed in the slanted ejector, the mounting hole (30) extending through both sides of the slanted ejector, the two parts of the mounting hole (30) being located in the working part (10) and the stress rod (20) respectively, the mounting hole (30) being in communication with the forming groove (13), the pin shaft (31) being inserted into the mounting hole (30) and arranged on the slanted ejector. An active piece (40) is arranged in the mounting hole (30), a long hole (41) being formed in the middle of the active piece (40), in the assembled state, the pin shaft (31) is inserted into the long hole (41), the active piece (40) can translate in the mounting hole (30), one end of the active piece (40) located in the working part (10) being a working end (42), the working end (42) protruding to form a protrusion (43) in the direction close to the working surface (11) on the side close to the working surface (11), the end surface of the protrusion (43) close to the working part (10) being coplanar with the inner side surface of the forming groove (13) close to the protrusion (43), the side of the working end (42) close to the working surface (11) being coplanar with the inner side surface of the forming groove (13) close to the working end (42). The working end (42) and the end away from the working end (42) of the active piece (40) are respectively attached to the two ends of the inner cavity of the mounting hole (30), the inner wall of the mounting hole (30) limits the movement track of the active piece (40).

2. A sloping roof according to claim 1, characterized in that In the assembled state, the pin shaft (31) is located at the end of the long hole (41) close to the protrusion (43), the side of the active piece (40) away from the protrusion (43) extends out of the mounting hole (30).

3. A sloping roof according to claim 2, characterized in that The slanted ejector according to any one of claims 1-3 and a mold core (50) are included.

4. A keyboard tray demolding assist structure characterized by, A through hole (52) for the stress rod (20) of the slanted ejector to extend out of and enter into is formed in the mold core (50), an injection cavity (53) and a working cavity (54) for the working part (10) to enter into are formed at one end of the mold core (50), the through hole (52) is in communication with the injection cavity (53) and the working cavity (54), the end of the through hole (52) close to the working cavity (54) has a limiting passage (55) for limiting the movement track of the active piece (40), the limiting passage (55) is attached to the side of the active piece (40) close to the working surface (11) and the side away from the working surface (11). ​ In the assembled state, the pin shaft (31) is located at one end of the long hole (41) close to the protrusion (43), the side of the movable piece (40) away from the pin shaft (31) extends out of the forming groove (13) and is in contact with the inner side surface of the limiting channel (55), and the working surface (11) of the working part (10) and the cavity formed by the side surface of the working cavity (54) and the working surface (11) form a molding cavity (51) with the injection cavity (53) and the forming groove (13) for injection molding.

5. A keyboard tray demolding assist structure according to claim 4, wherein The mold core (50) has a limiting part (56) at the junction of the working cavity (54) and the limiting channel (55), and in the assembled state, the side surface of the protrusion (43) away from the working part (10) is in close contact with the side surface of the limiting part (56) close to the working cavity (54), and the side of the movable piece (40) close to the working surface (11) is in close contact with the side of the limiting part (56) close to the limiting channel (55).