Secondary injection molding mold for rotary switch

Abstract

The utility model relates to a secondary injection molding mould for a rotary switch, which comprises an upper mould base and a lower mould base, the upper mould base is provided with an injection molding port, the secondary injection molding mould also comprises a pressing sleeve, a mounting seat and a clamping seat, the upper mould base is connected with the pressing sleeve, the lower mould base is fixedly connected with the mounting seat which is coaxially distributed with the pressing sleeve, the pressing sleeve is sleeved on the mounting seat, and the clamping seat is fixedly connected with the mounting seat. The rotary switch is provided with an outer ring portion and an inner ring portion, the outer ring portion is sleeved on the mounting seat, the inner ring portion is sleeved on the mounting seat, the pressing sleeve and the mounting seat are combined to form a mold cavity and an outer ring groove which are used for secondary injection molding, the injection molding opening is communicated with the mold cavity through the outer ring groove, and a clamping seat which is used for fixing the rotary switch is detachably connected in the mounting seat. And the inner ring part is clamped on the clamping seat, so that the rotary switch can be quickly positioned and mounted on a machine, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of molds, and in particular to a secondary injection molding mold for rotary switches. Background Technology

[0002] Two-stage injection molding can give a product a smooth surface. It is a process in which a certain plastic raw material is formed in a plastic mold in one stage, the formed part is taken out and placed into a second mold to be injected with the same or another type of plastic material to form a second part.

[0003] To increase the friction and comfort of the rotary switch's outer surface, it is necessary to apply a rubber coating to the sides of the rotary switch. Therefore, based on the structural characteristics of the rotary switch, the structure of the secondary injection mold needs to be designed to achieve the process requirements of rapid installation, secondary injection molding, and automatic demolding of the rotary switch. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a secondary injection molding mold for a rotary switch, including an upper mold base and a lower mold base. The upper mold base is provided with an injection port and also includes a pressure sleeve, a mounting base and a snap-fit ​​base. The upper mold base is connected to the pressure sleeve, and the lower mold base is fixedly connected to a mounting base coaxially distributed with the pressure sleeve. The pressure sleeve is sleeved on the mounting base, and the pressure sleeve and the mounting base are combined to form a mold cavity and an outer ring groove for secondary injection molding. The injection port communicates with the mold cavity through the outer ring groove, and a snap-fit ​​base for fixing the rotary switch is detachably connected inside the mounting base.

[0005] Using the above technical solution, this utility model is a secondary injection mold for a sewing machine rotary switch. The rotary switch has an outer ring and an inner ring. The outer ring is sleeved on the mounting base, and the inner ring is snapped into the snap-fit ​​base, which allows the rotary switch to be quickly positioned and installed on the machine, improving production efficiency. When the upper mold base and the lower mold base are closed, the rotary switch is pressed between the pressure sleeve and the mounting base, so that the rotary switch is fixed in the mold cavity. The injection molding machine injects rubber or rubber-plastic from the injection port, which fills the rotary switch through the outer ring groove, thereby completing the secondary injection molding of the rotary switch.

[0006] The present invention is further configured such that the mounting base is provided with a mounting groove and a threaded hole provided in the mounting groove, the snap-fit ​​seat is provided with a countersunk hole corresponding to the threaded hole, and the snap-fit ​​seat is threadedly connected to the mounting groove through the threaded hole.

[0007] Furthermore, the latching base is provided with a side latching block for latching a rotary switch, and the side latching block is provided with a reverse hook portion.

[0008] Using the above technical solution, when the rotary switch is snapped into the snap-fit ​​seat, the anti-hook part prevents the rotary switch from falling off naturally. Since the snap-fit ​​seat is detachably connected to the mounting base by screws, the lower mold base can be replaced with snap-fit ​​seats of different structures, making the mold universal and applicable to a wide range of applications.

[0009] The present invention is further configured such that the mounting groove is provided with an anti-reverse protrusion, and the snap-fit ​​seat is provided with a groove adapted to the anti-reverse protrusion.

[0010] Furthermore, the lower mold base is provided with a marking groove for positioning.

[0011] Using the above technical solution, the anti-reverse protrusion of the mounting slot is asymmetrically designed, making the mounting direction of the snap-fit ​​seat and the mounting seat unique. The rotary switch has a rectangular slot corresponding to the marking slot. When the machine is installed, the rotary switch is rotated so that the rectangular slot is close to the direction of the marking slot. At this time, the inner slot of the rotary switch can be snapped into the side snap-fit ​​block, improving production efficiency.

[0012] The present invention is further configured such that the mounting base is slidably connected to a push rod for demolding, and the top surface of the push rod is coplanar with the top surface of the mounting base.

[0013] Using the above technical solution, the lower mold base is slidably connected to the demolding platen via an optical axis, and one end of the push rod is fixedly connected to the demolding platen. When the injection molding machine controls the demolding platen to move, the push rod pushes the rotary switch out of the mounting base to achieve automated demolding.

[0014] The present invention is further configured such that the lower mold base is provided with circumferentially distributed drainage grooves around the outer ring groove, and the drainage grooves are provided with conical parts that communicate with the mold cavity.

[0015] Using the above technical solution, after the material melts, it enters from the injection port and fills the outer ring groove. It then flows into the mold cavity simultaneously from the drainage channels around the mold cavity through the outer ring groove. The cross-sectional area of ​​the tapered part near the mold cavity is smaller than that of the other end, thereby increasing the pressure when the material enters the mold cavity, making the mold cavity filled evenly and improving product quality.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model is a secondary injection mold for a rotary switch of a sewing machine. The rotary switch has an outer ring and an inner ring. The outer ring is sleeved on the mounting base and the inner ring is snapped into the snap-fit ​​base, so that the rotary switch can be quickly positioned and installed on the machine, thereby improving production efficiency.

[0018] 2. When the upper mold base and the lower mold base are closed, the rotary switch is pressed between the pressure sleeve and the mounting base, so that the rotary switch is fixed in the mold cavity. The injection molding machine injects rubber or rubber-plastic from the injection port, which fills the rotary switch through the outer ring groove, optimizes the flow channel structure, makes the mold cavity filled evenly, and improves the quality of the product.

[0019] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 For the present utility model Figure 2 A magnified view of the central A-direction view;

[0023] Figure 4 This is a top view of the lower mold base of this utility model;

[0024] Figure 5 This is a top view of the mounting base of this utility model;

[0025] Figure 6 Here is a perspective view of the card holder of this utility model:

[0026] Figure 7 Here is a perspective view of the rotary switch of this utility model:

[0027] Figure 8 This is a top view of the rotary switch of this utility model:

[0028] Wherein: 1-Upper mold base, 2-Lower mold base, 3-Pressure sleeve, 4-Mounting base, 5-Snap-fit ​​base, 6-Push rod, 7-Removal template, 9-Rotary switch, 11-Injection port, 12-Mold cavity, 13-Outer ring groove, 14-Marking groove, 15-Draining groove, 16-Conical part, 41-Mounting groove, 42-Threaded hole, 43-Anti-reverse protrusion, 51-Counterhead hole, 52-Side locking block, 53-Groove, 54-Reverse hook part, 91-Outer ring part, 92-Inner ring part, 93-Slot, 94-Rectangular groove; Detailed Implementation

[0029] Combination Figure 1-4As shown, a secondary injection molding mold for a rotary switch includes an upper mold base 1 and a lower mold base 2. The upper mold base 1 is provided with an injection port 11, and also includes a pressure sleeve 3, a mounting base 4, and a snap-fit ​​seat 5. The upper mold base 1 is connected to the pressure sleeve 3, and the lower mold base 2 is fixedly connected to the mounting base 4, which is coaxially distributed with the pressure sleeve 3. The pressure sleeve 3 is sleeved on the mounting base 4, and the pressure sleeve 3 and the mounting base 4 are combined to form a mold cavity 12 and an outer ring groove 13 for secondary injection molding. The injection port 11 communicates with the mold cavity 12 through the outer ring groove 13, and the snap-fit ​​seat 5 for fixing the rotary switch 9 is detachably connected inside the mounting base 4.

[0030] Combination Figure 5 , 6 As shown, in this embodiment, the mounting base 4 is provided with a mounting groove 41 and a threaded hole 42 provided in the mounting groove 41. The snap-fit ​​base 5 is provided with a countersunk hole 51 corresponding to the threaded hole 42. The snap-fit ​​base 5 is threadedly connected to the mounting groove 41 through the threaded hole 42. The snap-fit ​​base 5 is provided with a side snap-fit ​​block 52 for snapping the rotary switch 9. The side snap-fit ​​block 52 is provided with a hook portion 54. Since the snap-fit ​​base 5 is detachably connected to the mounting base 4 by screws, the lower mold base 2 can replace snap-fit ​​bases 5 with different structures, so that the mold can be universal and has a wide range of applications.

[0031] In this embodiment, the mounting groove 41 is provided with anti-reverse protrusions 43, the snap-fit ​​seat 5 is provided with grooves 53 that are adapted to the anti-reverse protrusions 43, and the lower mold seat 2 is provided with marking grooves 14 for positioning. The anti-reverse protrusions 43 are distributed in the marking grooves 14 in a triangular non-rotationally symmetric non-structure, so that the mounting direction of the snap-fit ​​seat 5 and the mounting seat 4 is unique.

[0032] Combination Figure 2 , 4 As shown, in this embodiment, the mounting base 4 is slidably connected to a push rod 6 for demolding, and the top surface of the push rod 6 is coplanar with the top surface of the mounting base 4. The lower mold base 2 is slidably connected to a demolding template 7 via an optical axis. One end of the push rod 6 is fixedly connected to the demolding template 7. When the injection molding machine controls the demolding template 7 to move, the push rod 6 pushes the rotary switch 9 out of the mounting base 4 to achieve automated demolding.

[0033] In this embodiment, the lower mold base 2 is provided with circumferentially distributed drainage channels 15 around the outer ring groove 13. The drainage channels 15 are provided with conical portions 16 that communicate with the mold cavity 12. After the material melts, it enters from the injection port 11 and fills the outer ring groove 13. It flows into the mold cavity 12 from the drainage channels 15 around the mold cavity 12 through the outer ring groove 13. The cross-sectional area of ​​the conical portion 16 near the mold cavity 12 is smaller than the cross-sectional area of ​​the other end, thereby increasing the pressure when the material enters the mold cavity 12, making the mold cavity 12 filled evenly and improving product quality.

[0034] Combination Figure 7 , 8As shown, the working principle of this utility model is as follows: the inner and outer sides of the bottom of the rotary switch 9 are respectively provided with an outer ring 91 and an inner ring 92. The inner ring 92 is provided with a slot 93 that matches the side locking block 52. When the rotary switch 9 is installed, the rotary switch 9 is rotated so that the rectangular slot 94 is close to the direction of the marking slot 14. It is then fitted onto the mounting base 4 through the outer ring 91. At this time, the inner slot 93 of the rotary switch 9 is just locked into the side locking block 52, so that the rotary switch 9 can be quickly positioned and installed. When the upper mold base 1 and the lower mold base 2 are closed, the rotary switch 9 is pressed between the pressure sleeve 3 and the mounting base 4, so that the rotary switch 9 is fixed in the mold cavity 12. The injection molding machine injects rubber or rubber-plastic from the injection port 11, which fills the rotary switch 9 through the outer ring groove 13, thereby completing the secondary injection molding of the handle part of the rotary switch 9.

[0035] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A secondary injection molding die for a rotary switch, comprising an upper mold base (1) and a lower mold base (2), wherein the upper mold base (1) is provided with an injection port (11), characterized in that, It also includes a pressure sleeve (3), a mounting base (4) and a snap-fit ​​seat (5). The upper mold base (1) is connected to the pressure sleeve (3), and the lower mold base (2) is fixedly connected to the mounting base (4) which is coaxially distributed with the pressure sleeve (3). The pressure sleeve (3) is sleeved on the mounting base (4), and the pressure sleeve (3) and the mounting base (4) are combined to form a mold cavity (12) and an outer ring groove (13) for secondary injection molding. The injection port (11) is connected to the mold cavity (12) through the outer ring groove (13). The mounting base (4) is detachably connected to a snap-fit ​​seat (5) for fixing the rotary switch.

2. The secondary injection molding die for a rotary switch according to claim 1, characterized in that: The mounting base (4) is provided with a mounting groove (41) and a threaded hole (42) provided in the mounting groove (41). The snap-fit ​​base (5) is provided with a countersunk hole (51) corresponding to the threaded hole (42). The snap-fit ​​base (5) is threadedly connected to the mounting groove (41) through the threaded hole (42).

3. The secondary injection molding die for a rotary switch according to claim 2, characterized in that: The latching base (5) is provided with a side latching block (52) for latching a rotary switch, and the side latching block (52) is provided with a reverse hook (54).

4. The secondary injection molding die for a rotary switch according to claim 3, characterized in that: The mounting groove (41) is provided with an anti-reverse protrusion (43), and the snap-fit ​​seat (5) is provided with a groove (53) that is adapted to the anti-reverse protrusion (43).

5. The secondary injection molding die for a rotary switch according to claim 4, characterized in that: The lower mold base (2) is provided with a marking groove (14) for positioning.

6. The secondary injection molding die for a rotary switch according to claim 1, characterized in that: The lower mold base (2) is provided with circumferentially distributed drainage grooves (15) around the outer ring groove (13), and the drainage grooves (15) are provided with a conical part (16) that communicates with the mold cavity (12).

7. The secondary injection molding die for a rotary switch according to claim 1, characterized in that: The mounting base (4) is slidably connected to a push rod (6) for demolding, and the top surface of the push rod (6) is coplanar with the top surface of the mounting base (4).

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