Die suitable for high-precision small-hole earmuff and earcap

Abstract

The utility model relates to the technical field of earplug forming equipment, in particular to a mold suitable for high-precision small-hole earmuffs and earcaps. Comprising a mold frame, an upper mold core, a lower mold core, an insert and a glue feeding assembly, the upper mold core comprises a glue inlet channel, a shunting channel and an upper cavity which are sequentially communicated, the lower mold core is provided with a lower mold head and a through hole, and the lower mold head and the upper cavity are combined to form a forming cavity; the insert comprises a rod part, a forming end part, a plurality of first convex columns and a plurality of second convex parts which are sequentially connected, the rod part penetrates through the through hole to enable the forming end part to protrude out of the through hole to enter the forming cavity, the first convex columns are convexly arranged at the forming end part, and the second convex parts are convexly arranged on the first convex columns; after the upper mold core and the lower mold core are closed, the second convex part protrudes into the shunting channel, and the caliber of the shunting channel is greater than the radial specification of the first convex column; and the second convex part is arranged, so that the forming quality of the small hole is further improved, the purpose of synchronously forming the small hole of the earplug and the earplug is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of earplug molding equipment, in particular to a mold suitable for high-precision small-hole earmuffs and ear caps. Background Art

[0002] like Fig.11 The earplug product is a soft rubber part. According to the use requirements, multiple small holes need to be processed on the top of the earplug. The hole diameter is within 0.3 mm. Usually, the earplug body is formed and then the small holes are formed by punching. However, the punching needle is small in size and difficult to process, and the punching force point is not easy to control, resulting in high production costs and uncontrollable production qualification rate. It cannot meet the processing requirements and needs to be improved. Summary of the invention

[0003] In order to overcome the disadvantage of high difficulty coefficient of punching process in the prior art, the purpose of the utility model is to provide a mold suitable for high-precision small-hole earmuffs and ear caps, so as to improve production efficiency and reduce production costs.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] A mold suitable for high-precision small-hole earmuffs and ear caps, comprising a mold frame, an upper mold core, a lower mold core, an insert and a glue injection component;

[0006] The upper mold core comprises a glue inlet channel, a diversion channel and an upper mold cavity which are sequentially connected from top to bottom, and the glue inlet assembly is connected to the glue inlet channel;

[0007] The lower mold core is provided with a lower mold head and a perforation, and the lower mold head and the upper mold cavity are combined to form a molding cavity;

[0008] The insert comprises a rod portion, a molding end portion, a plurality of first convex columns and a plurality of second convex portions connected in sequence, the rod portion passes through the through hole so that the molding end portion protrudes out of the through hole into the molding cavity, the first convex column is convexly arranged on the molding end portion, and the second convex portion is convexly arranged on the first convex column;

[0009] After the upper mold core and the lower mold core are molded together, the second convex portion protrudes into the diversion channel, and the diameter of the diversion channel is larger than the radial specification of the first convex column.

[0010] Furthermore, the diversion channel includes an upper channel and a lower channel.

[0011] Furthermore, the upper channel is in the shape of an inverted frustum.

[0012] Furthermore, the lower channel is in a truncated cone shape.

[0013] Furthermore, the upper mold core also includes a plurality of grooves, each of which is connected to the glue inlet assembly, and the glue inlet channel is connected to each of the grooves.

[0014] Furthermore, the mold suitable for high-precision small-hole earmuffs and ear caps also includes a connecting strip. The number of the inserts is several, and the several inserts are connected by the connecting strip. The connecting strip is located below the lower mold core.

[0015] The beneficial effects of the utility model are as follows: by arranging a glue inlet channel, a diversion channel and an upper cavity that are connected in sequence on the upper mold core, arranging a molding end, a plurality of first protrusions and a plurality of second protrusions on the insert, a first protrusion cooperates with a diversion channel, and a small hole is formed in the earplug molding process, that is, the small hole of the earplug is molded synchronously with the earplug body, and the arrangement of the second protrusion further improves the molding quality of the small hole, thereby achieving the purpose of synchronous molding of the small hole of the earplug and the earplug, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure of the upper mold core, lower mold core, insert and glue injection assembly of the utility model;

[0018] Figure 3 It is a schematic diagram of the disassembled structure of the upper mold core, the lower mold core, the insert and the glue feeding assembly of the utility model;

[0019] Figure 4 It is a three-dimensional cross-sectional view of the upper mold core of the utility model;

[0020] Figure 5 for Figure 4 A partial enlarged view of part A;

[0021] Figure 6 This is a schematic diagram of the insert structure of the utility model;

[0022] Figure 7 It is a three-dimensional cross-sectional view of the utility model;

[0023] Figure 8 It is a planar cross-sectional view of the utility model;

[0024] Fig. 9 for Figure 8 A partial enlarged view of part B;

[0025] Fig.10 for Fig. 9 A partial enlarged view of part C in the middle;

[0026] Fig.11 Schematic diagram of the workpiece to be processed.

[0027] Reference numerals include:

[0028] 1—upper mold core 11—plastic inlet channel 12—diversion channel

[0029] 121—upper channel 122—lower channel 13—upper cavity

[0030] 14—groove 2—lower die core 21—lower die head

[0031] 22 - perforation 3 - insert 31 - rod

[0032] 32—formed end 33—first protruding post 34—second protruding portion

[0033] 4—glue inlet assembly 5—connecting strip 100—workpiece. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0035] See also Figures 1 to 10 The utility model discloses a mold suitable for high-precision small-hole earmuffs and ear caps, comprising a mold frame, an upper mold core 1, a lower mold core 2, an insert 3 and a glue feeding component 4;

[0036] The upper mold core 1 includes a glue inlet channel 11, a diversion channel 12 and an upper mold cavity 13 which are connected in sequence from top to bottom, and the glue inlet component 4 is connected to the glue inlet channel 11;

[0037] The lower mold core 2 is provided with a lower mold head 21 and a through hole 22, and the lower mold head 21 is combined with the upper mold cavity 13 to form a molding cavity;

[0038] The insert 3 includes a rod portion 31, a molding end portion 32, a plurality of first convex columns 33 and a plurality of second convex portions 34 connected in sequence, the rod portion 31 passes through the through hole 22 so that the molding end portion 32 protrudes out of the through hole 22 and protrudes into the molding cavity, the first convex column 33 is protruded from the molding end portion 32, and the second convex portion 34 is protruded from the first convex column 33;

[0039] After the upper mold core 1 and the lower mold core 2 are molded together, the second protrusion 34 protrudes into the diversion channel 12 , and the diameter of the diversion channel 12 is larger than the radial specification of the first protrusion 33 .

[0040] Specifically, in this embodiment, a glue feed channel 11, a diverter channel 12 and an upper cavity 13 are processed on the upper mold core 1, wherein the number of the diverter channels 12 is multiple, and a plurality of first bosses 33 are processed on the upper end surface of the molding end 32 of the insert 3, each first boss 33 is equipped with a second convex portion 34, and the rod portion 31 of the insert 3 passes through the through hole 22. After the upper mold core 1 and the lower mold core 2 are molded together, the lower mold head 21 and the upper cavity 13 are combined to form a molding cavity, wherein one of the first bosses 33 cooperates with a diverter channel 12, and the caliber of the first boss 33 is smaller than that of the diverter channel 12, so that the molten glue can enter the molding cavity through the glue feed component 4, the glue feed channel 11 and the diverter channel 12. During the molding process of the earplug, the small hole of the earplug is also formed at the same time, wherein the second convex portion 34 protrudes into the diverter channel 12 to avoid the formation of burrs around the small hole.

[0041] By arranging a glue inlet channel 11, a diverter channel 12 and an upper cavity 13 which are connected in sequence on the upper mold core 1, and arranging a molding end 32, a plurality of first protrusions 33 and a plurality of second protrusions 34 on the insert 3, a first protrusion 33 cooperates with a diverter channel 12 to form a small hole in the earplug molding process, that is, the small hole of the earplug is molded synchronously with the earplug body, and the arrangement of the second protrusion 34 further improves the molding quality of the small hole, thereby achieving the purpose of synchronous molding of the small hole of the earplug and the earplug, thereby improving production efficiency.

[0042] The diversion channel 12 includes an upper channel 121 and a lower channel 122. The upper channel 121 is in an inverted cone shape, and the lower channel 122 is in a cone shape. This structural setting has the effect of buffering the flow rate of the molten glue, controlling the molten glue to fill the molding cavity, and ensuring production quality.

[0043] The upper mold core 1 further includes a plurality of grooves 14, each of which is connected to the glue inlet assembly 4, and the glue inlet channel is connected to each of the grooves, so as to achieve the purpose of molding multiple workpieces with one mold.

[0044] The mold suitable for high-precision small-hole earmuffs and ear caps also includes a connecting strip 5. The number of the inserts 3 is several, and the several inserts 3 are connected by the connecting strip 5. The connecting strip 5 is located below the lower mold core 2. The setting of the connecting strip 5 connects multiple inserts 3, further ensuring the stability of the connection of the inserts 3.

[0045] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A mold suitable for high-precision small-hole earmuffs and ear caps, comprising a mold frame, characterized in that: It also includes an upper mold core (1), a lower mold core (2), an insert (3) and a glue injection component (4); The upper mold core (1) comprises a glue inlet channel (11), a diversion channel (12) and an upper mold cavity (13) which are connected in sequence from top to bottom, and the glue inlet component (4) is connected to the glue inlet channel (11); The lower mold core (2) is provided with a lower mold head (21) and a through hole (22), and the lower mold head (21) and the upper mold cavity (13) are combined into a molding cavity; The insert (3) comprises a rod portion (31), a molding end portion (32), a plurality of first protrusions (33) and a plurality of second protrusions (34) which are connected in sequence; the rod portion (31) passes through the through hole (22) so that the molding end portion (32) protrudes out of the through hole (22) and enters the molding cavity; the first protrusion (33) is protruding from the molding end portion (32); and the second protrusion (34) is protruding from the first protrusion (33); After the upper mold core (1) and the lower mold core (2) are molded together, the second protrusion (34) protrudes into the diversion channel (12), and the diameter of the diversion channel (12) is larger than the radial specification of the first protrusion (33).

2. The mold for high-precision small-hole earmuffs and ear caps according to claim 1, characterized in that: The branch channel (12) comprises an upper channel (121) and a lower channel (122).

3. The mold for high-precision small-hole earmuffs and ear caps according to claim 2, characterized in that: The upper channel (121) is in the shape of an inverted truncated cone.

4. The mold for high-precision small-hole earmuffs and ear caps according to claim 2, characterized in that: The lower channel (122) is in the shape of a truncated cone.

5. The mold for high-precision small-hole earmuffs and ear caps according to claim 1, characterized in that: The upper mold core (1) further comprises a plurality of grooves (14), each groove (14) being connected to the glue feed assembly (4), and the glue feed channel (11) being connected to each of the grooves (14).

6. The mold for high-precision small-hole earmuffs and ear caps according to claim 1, characterized in that: The mold suitable for high-precision small-hole earmuffs and ear caps also includes a connecting strip (5), the number of the inserts (3) is several, and the several inserts (3) are connected by the connecting strip (5), and the connecting strip (5) is located below the lower mold core (2).

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