Forming mold for silica gel key

Abstract

The utility model relates to a forming die for silica gel keys in the field of dies, which comprises an upper die plate and a lower die plate, guide holes are arranged on the surface of the upper die plate, guide columns matched with the guide holes are arranged on the surface of the lower die plate, the upper die plate and the guide columns are matched and inserted through the guide holes to form a closed die, and mounting grooves are arranged on the surface of the upper die plate. An installation groove is formed in the upper die plate, an electromagnet is embedded in the installation groove and electrically connected with a power control switch, an iron block matched with the electromagnet is arranged on the lower die plate, and when the upper die plate and the lower die plate are assembled and positioned in a die assembly mode, the power control switch controls the electromagnet to be powered on to generate magnetism to conduct magnetic attraction limiting with the iron block. The power supply controls the switch to be powered off, so that the electromagnet and the iron block can be separated, the upper template and the lower template can be accurately guided in the mold closing process, the displacement deviation of the upper template and the lower template is reduced, the stability and accuracy of the mold after mold closing are further improved, and the forming quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the field of molds, and particularly to a molding mold for silicone buttons. Background Art

[0002] As an indispensable tool in modern industrial production, molds are widely used in many fields such as plastic processing, rubber products, and metal die-casting. Among them, in the field of plastic products, molding molds play a crucial role. Molding molds play a vital role in, including but not limited to, household appliance shells for daily use, electronic product accessories, and industrial-grade heavy machinery parts. In the production of silicone buttons, the molding mold determines the shape, size, and performance of the buttons, and is a key structure in the manufacturing process of silicone buttons.

[0003] The production and molding process of the molding mold for silicone buttons mainly involve multiple links such as mold design, material selection, processing and production, and molding technology. The existing molding molds for silicone buttons usually adopt pressing or injection molding processes. The compression molding mold directly adds silicone raw materials into the mold cavity, and through heating and applying pressure, the silicone material flows and fills the cavity under high temperature and high pressure, and hardens and forms after cooling; the injection molding mold injects the heated and molten silicone material into the mold cavity through an injection molding machine, and the required-shaped silicone buttons are obtained after cooling.

[0004] However, although the existing molding molds for silicone buttons meet the production requirements to a certain extent, there are still some defects. The existing molding molds for silicone buttons generally use positioning posts and positioning holes for positioning, so that the upper template and the lower template press and vulcanize the silicone raw materials to form. However, due to the processing errors of the positioning holes and positioning posts and the wear caused by long-term use, the accuracy of the combination of the upper template and the lower template will gradually decrease, affecting the dimensional accuracy and shape consistency of the silicone buttons, and resulting in poor stability and accuracy when the upper template and the lower template are closed, thus affecting the molding quality and use of the silicone buttons. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above defects, and provide a molding mold for silicone buttons to solve the technical problems that the closing stability and accuracy of the upper template and the lower template of the mold in the above background art are poor, thus affecting the molding quality and efficiency.

[0006] The purpose of the utility model is achieved in the following way:

[0007] A molding die for a silicone button, comprising an upper template and a lower template. When the upper template and the lower template are closed, the silicone is vulcanized to form a corresponding button. Two or more guiding holes are formed on the surface of the upper template, and guiding columns paired with the guiding holes are arranged on the surface of the lower template. The upper template is inserted and assembled with the guiding columns through the guiding holes to form a closed mold. An installation groove is formed on the surface of the upper template, and an electromagnet is embedded in the installation groove. The surface of the electromagnet is exposed outside the installation groove, and the electromagnet is electrically connected to a power control switch. An iron block paired with the electromagnet is arranged on the lower template. When the upper template and the lower template are assembled and positioned in a closed mold, the electromagnet is controlled by the power control switch to be energized to generate magnetism and magnetically limit the iron block. When the upper template and the lower template are opened, the power control switch is powered off so that the electromagnet and the iron block can be separated.

[0008] Further, in the above description, two or more positioning columns are formed on the surface of the upper template, and positioning holes paired with the positioning columns are arranged on the surface of the lower template.

[0009] Further, in the above description, a plurality of strip-shaped grooves are formed on the surface of the lower template, so that when the silicone is vulcanized and formed through the upper template and the lower template, raised reinforcing ribs are formed by the strip-shaped grooves.

[0010] Optionally, the arranged strip-shaped grooves enable the silicone to further enhance the stability and accuracy of the silicone material forming during the pressing and heating for vulcanization in the process of closed mold pressing, as the raised reinforcing ribs are formed through the strip-shaped grooves.

[0011] Further, in the above description, a plurality of crimping grooves are formed on the surface of the lower template, and crimping protrusions paired with the crimping grooves are formed on the surface of the upper template.

[0012] Optionally, the paired crimping of the arranged crimping protrusions and the pressing protrusions enables the pressing of the silicone raw material, further improving the stability and reliability of the silicone raw material forming.

[0013] Further, in the above description, four guiding holes are provided, and the four guiding holes are distributed at the four corners of the upper template. The guiding columns are paired with the guiding holes, so that each guiding hole is inserted on a corresponding guiding column, and the end of the guiding column far from the lower template forms a conical shape.

[0014] Further, in the above description, a protective cushion block is adhered to the upper surface of the iron block. The arranged protective cushion block plays a protective role in the magnetic attraction between the electromagnet and the iron block, reducing the impact and vibration during the closed mold process and improving the stability of the closed mold limit.

[0015] Further, in the above description, a plurality of raised convex blocks are formed on the bottom surface of the upper template, and grooves paired with the positions and numbers of the convex blocks are formed on the surface of the lower template close to the upper template.

[0016] Advantages of the present utility model: By arranging the guiding holes on the upper template to be inserted and paired with the guiding columns on the lower template, the upper template and the lower template are accurately guided during the mold closing process, effectively reducing mold damage and product defect rate caused by misalignment or offset, improving the accuracy and stability of mold closing. By arranging the magnetic attraction limit locking of the electromagnet and the iron block, the mold is firmly positioned under the control of the power control switch after mold closing, without the need for additional mechanical locking devices or complex operation steps, simplifying the operation process of the mold. At the same time, under the magnetic limit of the electromagnet and the iron block, the stability after mold closing of the mold is further improved, reducing the displacement deviation between the upper template and the lower template. Due to the characteristics of fast response and easy control of the magnetic attraction limit mechanism of the electromagnet and the iron block, the versatility and flexibility of the mold are improved, and the stability and accuracy after mold closing of the upper template and the lower template are further enhanced, improving the forming quality and efficiency. Description of the Drawings

[0017] Figure 1 It is a perspective view from the top view angle of this embodiment;

[0018] Figure 2 It is a perspective view from the bottom view angle of this embodiment;

[0019] Figure 3 It is a cross-sectional view of this embodiment;

[0020] Figure 4 It is a schematic structural view of the upper template in this embodiment;

[0021] Figure 5 It is a schematic structural view of the lower template in this embodiment;

[0022] Figure 6 It is a schematic connection structural view of the protective cushion block in this embodiment;

[0023] The reference numerals in the drawings are respectively: 1 - upper template, 2 - lower template, 3 - guiding hole, 4 - guiding column, 5 - installation groove, 6 - electromagnet, 7 - iron block, 8 - positioning column, 9 - positioning hole, 10 - strip-shaped groove, 11 - crimping groove, 12 - crimping protrusion, 13 - protective cushion block, 14 - convex block, 15 - groove. Detailed Embodiment

[0024] The present utility model will be further described in detail below in conjunction with the drawings and the specific embodiments.

[0025] In this embodiment, refer to Figures 1-6, A molding die for a silicone button in its specific implementation includes an upper template 1 and a lower template 2. A convex block 14 is formed on the bottom surface of the upper template 1, and a groove 15 that matches the position and quantity of the convex block 14 is formed on the surface of the lower template 2 close to the upper template 1. When the upper template 1 and the lower template 2 are closed, the silicone forms a corresponding button through vulcanization.

[0026] Four guiding holes 3 are provided on the surface of the upper template 1, and guiding columns 4 that match the guiding holes 3 are arranged on the surface of the lower template 2. The upper template 1 is inserted and assembled through the matching of the guiding holes 3 and the guiding columns 4 to form a closed mold. There are four guiding holes 3, and the four guiding holes 3 are distributed at the four corners of the upper template 1. The guiding columns 4 are paired with the guiding holes 3, so that each guiding hole is inserted onto a corresponding guiding column 4. The end of the guiding column 4 away from the lower template 2 is formed into a conical shape. Through the paired insertion of the four guiding holes 3 and the four guiding columns 4, which are distributed at the four corners of the upper template 1 and the lower template 2, the stability and accuracy during mold closing are further improved.

[0027] Two symmetrically distributed mounting grooves 5 are provided on the surface of the upper template 1. An electromagnet 6 is embedded in the mounting groove 5. The surface of the electromagnet 6 is exposed outside the mounting groove 5, and the electromagnet 6 is electrically connected to a power control switch (not shown). An iron block 7 that matches the electromagnet 6 is arranged on the lower template 2. When the upper template 1 and the lower template 2 are assembled and positioned in the closed mold, the electromagnet 6 is controlled by the power control switch to be energized to generate magnetism and magnetically limit the iron block 7. When the upper template 1 and the lower template 2 are opened, the power control switch is de-energized so that the electromagnet 6 and the iron block 7 can be separated.

[0028] Four positioning columns 8 are formed on the surface of the upper template 1, and positioning holes 9 that match the positioning columns 8 are arranged on the surface of the lower template 2. The accurate positioning of the mold is achieved through the precise cooperation of the positioning columns 8 and the positioning holes 9 to ensure the stability and accuracy when the upper template 1 and the lower template 2 are closed.

[0029] Three strip-shaped grooves 10 are provided on the surface of the lower template 2, so that when the silicone is vulcanized and formed through the upper template 1 and the lower template 2, raised reinforcing ribs are formed by the strip-shaped grooves 10.

[0030] Optionally, the provided strip-shaped grooves 10 enable the silicone to form raised reinforcing ribs through the strip-shaped grooves 10 during the process of compression molding and heating for vulcanization, further enhancing the stability and accuracy of the silicone material forming.

[0031] Six crimping grooves 11 are provided on the surface of the lower template 2, and six crimping protrusions 12 that match the crimping grooves 11 are formed on the surface of the upper template 1.

[0032] Optionally, the set crimping protrusion 12 is crimped with the paired crimping protrusion to compress the silicone raw material, further improving the stability and reliability of the silicone raw material forming.

[0033] A protective cushion block 13 is adhesively bonded to the upper surface of the iron block 7. The protective cushion block 13 provided plays a protective role in the magnetic attraction of the electromagnet 6 and the iron block 7, and improves the stability of the mold closing limit against the impact and vibration during the mold closing process.

[0034] Specifically, the mold filled with the silicone raw material is sent into a vulcanizer for heating and pressure vulcanization. Among them, the main control parameters for vulcanization are temperature, pressure, and vulcanization time. The typical operating process conditions are: temperature 160°C ± 10°C; pressure 15 - 20 MPa; time 100 - 150 s.

[0035] During the vulcanization process, the silicone material undergoes a cross-linking reaction under high temperature and pressure to form a stable elastomer structure.

[0036] The presence or absence of the magnetism of the electromagnet 6 can be controlled by turning on and off the current; the magnitude of the magnetism can be controlled by the strength of the current or the number of turns of the coil; it can also be controlled by changing the resistance to control the magnitude of the current. Specifically, this control method of the electromagnet 6 generating magnetism for magnetic attraction and fixation belongs to conventional technical means. Therefore, in this embodiment, the detailed description is omitted.

[0037] The specific mold closing action in this embodiment is as follows: Install the upper template 1 and the lower template 2 on the silicone vulcanizer. Lift the upper template 1, place a protective silicone raw material sheet on the upper surface of the lower template 2, and then insert and install the guiding hole 3 provided on the upper template 1 and the guiding column 4 of the lower template 2 in a paired manner, so that the upper template 1 and the lower template 2 are precisely guided during the mold closing process, reducing the mold damage and product defect rate caused by misalignment or deviation, and improving the mold closing accuracy and stability through the paired insertion of the positioning hole 9 and the positioning column 8;

[0038] After the upper template 1 and the lower template 2 are combined, the electromagnet 6 is connected to an external power source through a power control switch. The electromagnet 6 and the iron block 7 are used to magnetically limit and lock the mold, so that the mold is firmly positioned by the control of the power control switch to make the electromagnet 6 generate magnetism and match the magnetism of the iron block 7 after mold closing. There is no need for additional mechanical locking devices or complex operation steps, simplifying the operation process of the mold. At the same time, under the magnetic limit of the electromagnet 6 and the iron block 7, the stability of the mold after mold closing is improved, and the displacement deviation between the upper template 1 and the lower template 2 is reduced;

[0039] When the upper template 1 and the lower template 2 are opened, the power control switch is manually powered off, causing the electromagnet 6 to lose magnetism and separate from the iron block 7, enabling the upper template 1 to be separated. This reduces the friction and wear between the die components and extends the service life of the die. With the assistance of tools such as an air gun, the silicone keypad is slowly removed from the lower template 2, thus completing the molding of the silicone keypad. Due to the magnetic attraction and limiting mechanism between the electromagnet 6 and the iron block 7, which has the characteristics of fast response and easy control, the versatility and flexibility of the die are improved, and the stability and accuracy after the upper template 1 and the lower template 2 are closed are further enhanced, improving the quality and efficiency of molding.

[0040] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention is disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, when making some changes or modifications using the above-disclosed technical content as equivalent change equivalent embodiments, but as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical meaning of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A molding die for a silicone button, comprising an upper template and a lower template. The upper template and the lower template are closed to form a corresponding button through vulcanization of silicone. It is characterized in that: The surface of the upper template is provided with more than two guiding holes, and the surface of the lower template is provided with guiding columns paired with the guiding holes. The upper template is inserted and assembled with the guiding columns through the guiding holes to form a mold closing. The surface of the upper template is provided with mounting grooves, and electromagnetic magnets are embedded in the mounting grooves. The surfaces of the electromagnetic magnets are exposed outside the mounting grooves, and the electromagnetic magnets are electrically connected with a power control switch. An iron block paired with the electromagnetic magnet is arranged on the lower template. When the upper template and the lower template are assembled and positioned in mold closing, the electromagnetic magnet is controlled to be energized through the power control switch to generate magnetism and perform magnetic attraction and limit with the iron block. When the upper template and the lower template are opened, the power control switch is powered off so that the electromagnetic magnet and the iron block can be separated.

2. The forming mold for a silicone button according to claim 1, wherein: The surface of the upper template is formed with more than two positioning columns, and the surface of the lower template is provided with positioning holes paired with the positioning columns.

3. The molding die for a silicone button according to claim 1, wherein: A plurality of strip-shaped grooves are formed on the surface of the lower template, so that when the silicone is vulcanized and formed through the upper template and the lower template, raised reinforcing ribs are formed by the strip-shaped grooves.

4. The molding die for a silicone button according to claim 1, wherein: A plurality of crimping grooves are formed on the surface of the lower template, and crimping protrusions paired with the crimping grooves are formed on the surface of the upper template.

5. The molding die for a silicone key according to claim 1, wherein: Four guiding holes are provided, and the four guiding holes are distributed at the four corners of the upper template. The guiding columns are paired with the guiding holes, so that each guiding hole is inserted on a corresponding guiding column. The end of the guiding column far away from the lower template is formed into a conical shape.

6. The molding die for a silicone key according to any one of claims 1-5, characterized in that: A protective cushion block is bonded to the upper surface of the iron block.

7. The forming mold for a silicone button according to any one of claims 1-5, characterized in that: A plurality of raised bumps are formed on the bottom surface of the upper template, and grooves paired with the positions and numbers of the bumps are formed on the surface of the lower template close to the upper template.

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