Dial switch composite molding injection mold

Abstract

The utility model provides a dial switch composite moulding injection mould, including moving template, fixed template, two lifting rod, lifting plate and prepositioning mechanism, prepositioning mechanism includes tact switch, pressure spring and locating pin, the fixed template is provided with limit slot, the pin shoulder end of locating pin is movably located in the limit slot, and the pin shoulder end of locating pin is located in the limit slot. The pin inserting end of the positioning pin penetrates out of the mold closing side of the fixed mold plate and can be inserted into a first positioning hole of the metal material strap, the compressed spring is located in the limiting groove and abuts against the position between the pin shoulder end and the groove bottom face of the limiting groove, an arc ring groove is formed in the peripheral face of the pin shoulder end in an inwards-concave mode, and a touch rod of the touch switch is inserted into the limiting groove in a telescopic moving mode. And the arc end of the touch rod can be inserted into or separated from the arc ring groove. According to the composite molding injection mold for the dial switch, full-automatic production is realized, and the pre-positioning mechanism is arranged to perform pre-positioning operation and identification on the metal material strap, so that the feeding accuracy of the metal material strap is ensured, and the production accuracy, the production quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding production technology, and in particular to a composite injection mold for DIP switches. Background Technology

[0002] A DIP switch (also known as a toggle switch, overclocking switch, or digital switch) is an address switch used for operation and control. It uses the binary encoding principle of 0 / 1 and is widely used in data processing, communication equipment, remote control devices, anti-theft automatic alarm systems, air showers, and other products that require manual programming. It has broad market application prospects.

[0003] See Figure 1 and Figure 2 The DIP switch 10 mainly includes a first metal spring 12, a second metal spring 13, and a switch plastic body 11. The first metal spring 12 and the second metal spring 13 are respectively connected to opposite sides of the switch plastic body 11.

[0004] To achieve fully automated production, patent CN216373059U discloses an automated material strip injection molding device for DIP switches. Through the design of a bridge fixing block, a movable bridge, a metal strip, a moving mold cavity, a fixed mold cavity, and positioning pins, the movable bridge is positioned at the upper end of the bridge fixing block and contains the metal strip. The metal terminals inside the DIP switch pass through the movable bridge. During mold opening, the ejector pin pushes the movable bridge out, allowing the metal strip to move freely within it. After automated feeding, the mold is locked, and the machine presses down to reset the movable bridge, thus achieving fully automated production. It is very convenient to use. Furthermore, through the design of positioning teeth and positioning grooves, when the machine presses down to reset the movable bridge, the positioning teeth are positioned at the upper end of the bridge fixing block, and the positioning groove is aligned with the positioning teeth. Precise positioning is achieved using the positioning teeth and positioning pins, avoiding errors.

[0005] However, in the aforementioned automated strip injection molding device with DIP switches, after the automatic feeding of the metal strip is completed, before the machine presses down to reset the movable bridge and lock the mold, there is no pre-positioning operation or identification of the metal strip. This may result in deviations in the feeding of the metal strip, meaning that the metal strip is not accurately fed to the preset position. Subsequently, when the machine presses down to reset the movable bridge, the positioning groove on the moving mold core can still align with the positioning teeth on the fixed mold core, but the positioning pins on the moving mold core may not correspond to the positioning holes of the metal strip. There is a phenomenon that the positioning pins on the moving mold core may damage the metal strip, thus affecting production accuracy, and consequently affecting production quality and efficiency. Summary of the Invention

[0006] To achieve the main objective of this utility model, this utility model provides a fully automated injection mold for DIP switch composite molding with high production precision, thereby improving production quality and thus production efficiency.

[0007] To achieve the main objective of this utility model, it provides a composite injection mold for a DIP switch, comprising a moving mold plate, a fixed mold plate, two lifting rods, a lifting plate, and a pre-positioning mechanism. The moving mold plate can move towards or away from the fixed mold plate in the Z-axis direction. The moving core of the moving mold plate and the fixed core of the fixed mold plate can form an injection cavity. A metal strip is movably located between the moving mold plate and the fixed mold plate in the X-axis direction, and the first and second metal springs of the metal strip are respectively inserted into the injection cavity. The lifting plate can be movably positioned on the side of the fixed mold plate away from the moving mold plate in the Z-axis direction. The two lifting rods are symmetrically arranged about the injection cavity in the Y-axis direction, with the first end of the lifting rod connected to the lifting plate and the second end of the lifting rod extending out of the fixed mold plate and close to the moving mold plate. On the mold closing side, the second end of the lifting rod is provided with a groove through the outer peripheral surface of the injection cavity in the X-axis direction. The two opposite ends of the metal strip in the Y-axis direction are respectively inserted into the two grooves. The pre-positioning mechanism includes a touch switch, a compression spring and a positioning pin. The fixed mold plate is provided with a limiting groove. The pin shoulder end of the positioning pin is movable in the limiting groove in the Z-axis direction. The pin insertion end of the positioning pin passes through the mold closing side of the fixed mold plate and can be inserted into the first positioning hole of the metal strip. The compression spring is located in the limiting groove and abuts against the pin shoulder end and the bottom surface of the limiting groove. The outer peripheral surface of the pin shoulder end is recessed with an arc-shaped groove. The touch switch is set on the fixed mold plate, and the touch rod of the touch switch can be telescopically inserted into the limiting groove so that the arc end of the touch rod can be inserted into or disengaged from the arc-shaped groove.

[0008] As can be seen from the above scheme, in the injection molding process of the composite injection mold for DIP switches of this utility model, the metal strip located between the moving platen and the fixed platen moves and is fed to the predetermined injection molding position in the X-axis direction. Since the opposite ends of the metal strip in the Y-axis direction are respectively inserted into the grooves of the two lifting rods, the grooves of the lifting rods play a limiting and guiding role for the metal strip, so that the metal strip moves and is fed stably and reliably along the X-axis direction. Subsequently, the lifting plate is controlled to move away from the moving platen in the Z-axis direction to reset. At the same time, the lifting rods set on the lifting platen synchronously drive the metal strip to move away from the moving platen in the Z-axis direction under the pulling action of its grooves, so that the metal strip is supported on the fixed mold core of the fixed platen. At this time, under the elastic force of the compression spring of the pre-positioning mechanism, the fixed mold core is... The pin end of the positioning pin can be inserted into the first positioning hole of the metal strip supported on the fixed mold core, which allows the trigger rod of the touch switch to extend and move into the limiting groove of the fixed mold plate. Thus, the arc end of the trigger rod is inserted into the arc ring groove of the positioning pin, and the touch switch can recognize that the metal strip is correctly fed to the predetermined injection molding position. Then, the moving mold plate is controlled to move towards the fixed mold plate in the Z-axis direction to the mold closing state, so that an injection cavity is formed between the moving mold core of the moving mold plate and the fixed mold core of the fixed mold plate. After that, the switch plastic body of the DIP switch is injection molded into the injection cavity. Since the first metal spring and the second metal spring of the metal strip are respectively inserted into the injection cavity, the injection molded switch plastic body can be connected to the first metal spring and the second metal spring respectively, as shown in the figure.

[0009] Furthermore, if the metal strip is fed off the predetermined injection molding position, the pin insertion end of the locating pin and the first locating hole of the metal strip will not align in the Z-axis direction. As a result, under the pulling action of the sliding groove of the lifting rod, the metal strip will move away from the moving mold plate in the Z-axis direction to support the fixed mold core of the fixed mold plate. During this process, the metal strip will press against the pin insertion end of the locating pin, forcing the locating pin to move away from the moving mold plate in the Z-axis direction. This forces the arc end of the trigger rod of the trigger switch to disengage from the arc groove of the locating pin, thus forcing the trigger rod of the trigger switch to retract. The trigger switch can then detect that the metal strip has not been correctly fed to the predetermined injection molding position, issue an alarm reminder, and suspend the control of the moving mold plate closing operation to avoid damage to the metal strip caused by the closing operation of the moving mold plate.

[0010] After injection molding of the composite injection mold for the DIP switch, the moving platen is first controlled to move away from the fixed platen in the Z-axis direction to the mold opening state. Then, the lifting plate is controlled to move closer to the moving platen in the Z-axis direction. At the same time, the lifting rod on the lifting platen, under the pulling action of its slide groove, synchronously drives the metal strip to move closer to the moving platen in the Z-axis direction, so that the metal strip synchronously drives the injection-molded switch plastic body to detach from the fixed mold core of the fixed platen. When the metal strip and the injection-molded switch plastic body are pulled away from the fixed mold core of the fixed platen and move to the preset feeding position under the pulling action of the sliding groove of the lifting rod, the first positioning hole of the metal strip has also disengaged from the pin insertion end of the positioning pin, so that the metal strip can move and feed in the X-axis direction for the next injection molding production.

[0011] Therefore, the composite injection mold for DIP switches of this utility model achieves the goal of fully automated production, and is equipped with a pre-positioning mechanism to perform pre-positioning operation and identification of the metal strip, ensuring the accuracy of metal strip feeding, thereby improving production precision, production quality, and ultimately production efficiency.

[0012] A further embodiment is that the DIP switch composite molding injection mold also includes two guide plates and two linkage rods. The two guide plates are located at both ends of the fixed mold core in the X-axis direction, and each guide plate is provided with a limit channel in the X-axis direction. The metal strip can move through the two limit channels in the X-axis direction. The first end of one linkage rod is connected to the lifting plate, and the second end of one linkage rod extends out of the mold closing side of the fixed mold plate and is connected to one guide plate.

[0013] A further option is to have two pre-positioning mechanisms. One pre-positioning mechanism is located on the material inlet / outlet side of a guide plate away from the fixed mold core in the X-axis direction, and the pin insertion end of the positioning pin passes through the mold closing side of the fixed mold plate and the guide plate in sequence and can be inserted into the first positioning hole of the metal strip.

[0014] A further option is that the first opening of the slide in the X-axis direction is configured in an outwardly expanding V-shape; and / or, the second opening of the slide in the X-axis direction is configured in an outwardly expanding V-shape.

[0015] A further embodiment is that the injection molding cavity includes a main body cavity, a first runner cavity, and a second runner cavity that are connected to each other. The first runner cavity is connected to the injection channel of the moving template and extends in a long strip shape and connects to the first side frame of the metal strip. The second runner cavity extends in a long strip shape and connects to the second side frame of the metal strip. The first runner cavity and the second runner cavity are arranged opposite to each other in the Y-axis direction, and the first metal spring and the second metal spring are arranged opposite to each other in the X-axis direction.

[0016] A further embodiment is that the DIP switch composite molding injection mold also includes an ejector rod, an ejector plate, and a spring. The ejector plate can be moved in the Z-axis direction and is set on the side of the lifting plate away from the fixed platen. The mounting end of the ejector rod is connected to the ejector plate. The ejector end of the ejector rod passes through the lifting plate, the fixed platen, and the fixed mold core in sequence and connects with the main cavity of the body. The spring abuts between the fixed platen and the ejector plate.

[0017] A further embodiment is that there are multiple first metal springs and multiple second metal springs, with one first metal spring being positioned opposite to one second metal spring in the X-axis direction; there are multiple ejector pins, with one ejector pin being positioned corresponding to one first metal spring in the X-axis direction and located in the middle between the first and second metal springs; and / or, the mold closing side of the fixed mold core is provided with multiple first positioning platforms and multiple second positioning platforms protruding in the Z-axis direction, with one first positioning platform being able to be inserted into a first gap between two adjacent first metal springs, and one second positioning platform being able to be inserted into a second gap between two adjacent second metal springs.

[0018] A further embodiment is that the DIP switch composite molding injection mold also includes a first positioning pin, the mounting end of which is connected to the moving mold plate, and the positioning end of which extends through the moving mold core in the Z-axis direction and can be inserted into the second positioning hole of the metal strip; and / or, the DIP switch composite molding injection mold also includes a second positioning pin, the mounting end of which is connected to the fixed mold plate, and the positioning end of which extends through the fixed mold core in the Z-axis direction and can be inserted into the third positioning hole of the metal strip.

[0019] A further embodiment is that the DIP switch composite molding injection mold also includes a first positioning rod, the mounting end of which is connected to the moving template, the positioning end of which extends in the Z-axis direction and protrudes from the moving template, and a first positioning groove is provided on the mold closing side of the fixed template, into which the positioning end of the first positioning rod can be inserted; and / or, the DIP switch composite molding injection mold also includes a second positioning rod, the mounting end of which is connected to the fixed template, the positioning end of which extends in the Z-axis direction and protrudes from the fixed template, and a second positioning groove is provided on the mold closing side of the moving template, into which the positioning end of the second positioning rod can be inserted.

[0020] A further embodiment is that the injection mold for the DIP switch composite molding also includes a guide rod, the mounting end of which is connected to the moving template, the guide end of which protrudes from the moving template, and the fixed template has a guide hole through it in the Z-axis direction, the guide hole being slidably fitted onto the guide end of the guide rod. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a DIP switch.

[0022] Figure 2This is an exploded view of a DIP switch.

[0023] Figure 3 This is a first-view structural diagram of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0024] Figure 4 This is a second-view structural diagram of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0025] Figure 5 This is a structural diagram of the moving mold side of an embodiment of the composite injection mold for DIP switches of this utility model.

[0026] Figure 6 This is a structural diagram of the fixed mold side of an embodiment of the composite injection mold for DIP switches of this utility model.

[0027] Figure 7 This is a first-view sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0028] Figure 8 This is a second-view sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0029] Figure 9 This is a third-view sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0030] Figure 10 This is a fourth-angle sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0031] Figure 11 yes Figure 10 Enlarged view at point A.

[0032] Figure 12 This is a fifth-perspective sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0033] Figure 13 This is a sixth-angle sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0034] Figure 14 yes Figure 13 Enlarged view at point B.

[0035] Figure 15 This is a seventh-angle sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0036] Figure 16 yes Figure 15 Enlarged view at point C.

[0037] Figure 17This is a partial structural diagram of the lifting rod in an embodiment of the composite injection mold for the DIP switch of this utility model.

[0038] Figure 18 This is the eighth perspective sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0039] Figure 19 This is a ninth-angle sectional view of an embodiment of the composite injection mold for the DIP switch of this utility model.

[0040] Figure 20 yes Figure 19 Enlarged view at point D.

[0041] Figure 21 This is a schematic diagram of a product manufactured using an embodiment of the composite injection mold for the DIP switch of this utility model.

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0043] See Figures 3 to 20This embodiment discloses a composite injection mold 20 for DIP switches, including a movable mold plate 21 and a fixed mold plate 22. The movable mold plate 21 can move toward or away from the fixed mold plate 22 in the Z-axis direction. The movable mold core 211 of the movable mold plate 21 and the fixed mold core 221 of the fixed mold plate 22 can form an injection cavity 27. The metal strip 30 is movably located between the movable mold plate 21 and the fixed mold plate 22 in the X-axis direction, and the first metal spring 12 and the second metal spring 13 of the metal strip 30 are respectively inserted into the injection cavity 27. In this embodiment, the composite injection mold 20 for the DIP switch also includes two lifting rods 225, a lifting plate 23, and a pre-positioning mechanism. The lifting plate 23 is movably disposed on the side of the fixed mold plate 22 away from the moving mold plate 21 in the Z-axis direction. The two lifting rods 225 are symmetrically arranged about the injection cavity 27 in the Y-axis direction, and the first end of the lifting rod 225 is connected to the lifting plate 23. The second end of the lifting rod 225 extends out of the fixed mold plate 22 near the mold closing side of the moving mold plate 21. The second end of the lifting rod 225 is provided with a groove 2251 in the X-axis direction near the outer peripheral surface of the injection cavity 27. The two opposite ends of the metal strip 30 in the Y-axis direction are respectively inserted into the two grooves 2251. Furthermore, the positioning mechanism in this embodiment includes a touch switch 25, a compression spring 252, and a positioning pin 251. The fixed template 22 is provided with a limiting groove 229. The pin shoulder end of the positioning pin 251 is movable in the limiting groove 229 in the Z-axis direction. The pin insertion end 2511 of the positioning pin 251 passes through the mold closing side of the fixed template 22 and can be inserted into the first positioning hole 301 of the metal strip 30. The compression spring 252 is located in the limiting groove 229 and abuts against the pin shoulder end of the positioning pin 251 and the bottom surface of the limiting groove 229. The outer peripheral surface of the pin shoulder end of the positioning pin 251 is recessed with an arc-shaped groove 2512. The touch switch 25 is provided on the fixed template 22, and the touch rod 253 of the touch switch 25 is telescopically inserted into the limiting groove 229 so that the arc end of the touch rod 253 can be inserted into or disengaged from the arc-shaped groove 2512.

[0044] In this embodiment, during the injection molding process of the DIP switch composite molding injection mold 20, the metal strip 30 located between the moving mold plate 21 and the fixed mold plate 22 moves and feeds to the predetermined injection molding position in the X-axis direction. Since the opposite ends of the metal strip 30 in the Y-axis direction are respectively inserted into the slide grooves 2251 of the two lifting rods 225, the slide grooves 2251 of the lifting rods 225 play a limiting and guiding role for the metal strip 30, so that the metal strip 30 moves and feeds stably and reliably along the X-axis direction. Subsequently, the lifting plate 23 is controlled to move away from the moving mold plate 21 in the Z-axis direction to reset. At the same time, the lifting rods 225 on the lifting plate 23 are simultaneously driven by the pulling action of their slide grooves 2251 to move the metal strip 30 away from the moving mold plate 21 in the Z-axis direction, so that the metal strip 30 is supported on the fixed mold core 221 of the fixed mold plate 22. At this time, under the elastic force of the compression spring 252 of the pre-positioning mechanism, the pin insertion end 2 of the positioning pin 251 is... 511 can be inserted into the first positioning hole 301 of the metal strip 30 supported on the fixed mold core 221, so that the trigger rod 253 of the touch switch 25 can extend and move into the limiting groove 229 of the fixed mold plate 22, so that the arc end of the trigger rod 253 is inserted into the arc ring groove 2512 of the positioning pin 251. Then the touch switch 25 can recognize that the metal strip 30 is correctly fed to the predetermined injection molding position. Then, the moving mold plate 21 is controlled to move towards the fixed mold plate 22 in the Z-axis direction to the mold closing state, so that the moving mold core 211 of the moving mold plate 21 and the fixed mold core 221 of the fixed mold plate 22 form an injection cavity 27. Then, the switch plastic body of the DIP switch is injection molded into the injection cavity 27. Since the first metal spring 12 and the second metal spring 13 of the metal strip 30 are respectively inserted into the injection cavity 27, the injection molded switch plastic body can be connected to the first metal spring 12 and the second metal spring 13 respectively. Figure 21 As shown.

[0045] Furthermore, if the feeding of the metal strip 30 deviates from the predetermined injection molding position, the pin insertion end 2511 of the positioning pin 251 and the first positioning hole 301 of the metal strip 30 will not align in the Z-axis direction. As a result, under the pulling action of the slide groove 2251 of the lifting rod 225, the metal strip 30 will move away from the moving mold plate 21 in the Z-axis direction so that the metal strip 30 is supported on the fixed mold core 221 of the fixed mold plate 22. During this process, the metal strip 30 will press against the pin insertion end 2511 of the positioning pin 251. This forces the positioning pin 251 to move away from the moving mold plate 21 in the Z-axis direction, thereby forcing the arc end of the trigger rod 253 of the trigger switch 25 to disengage from the arc groove 2512 of the positioning pin 251. This forces the trigger rod 253 of the trigger switch 25 to retract, so that the trigger switch 25 can detect that the metal strip 30 has not been correctly fed to the predetermined injection molding position, and will issue an alarm reminder and suspend the control of the mold closing operation of the moving mold plate 21 to avoid damage to the metal strip 30 caused by the mold closing operation of the moving mold plate 21.

[0046] After the injection molding of the DIP switch composite molding injection mold 20 in this embodiment is completed, the moving mold plate 21 is first controlled to move away from the fixed mold plate 22 in the Z-axis direction to the mold opening state. Then, the lifting plate 23 is controlled to move closer to the moving mold plate 21 in the Z-axis direction. At the same time, the lifting rod 225 set on the lifting plate 23 synchronously drives the metal strip 30 to move closer to the moving mold plate 21 in the Z-axis direction under the pulling action of its slide groove 2251. This allows the metal strip 30 to synchronously drive the injection-molded switch plastic body to move away from the fixed mold core 221 of the fixed mold plate 22. When the metal strip 30 and the injection-molded switch plastic body move away from the fixed mold core 221 of the fixed mold plate 22 under the pulling action of the slide groove 2251 of the lifting rod 225 to the preset feeding position, the first positioning hole 301 of the metal strip 30 has also disengaged from the pin insertion end 2511 of the positioning pin 251. Thus, the metal strip 30 can move and feed in the X-axis direction for the next injection molding production.

[0047] Therefore, in this embodiment, the DIP switch composite molding injection mold 20 achieves the goal of fully automated production, and a pre-positioning mechanism is set up to perform pre-positioning operation and identification of the metal strip 30, ensuring the accuracy of the metal strip 30 feeding, thereby improving production precision, production quality, and ultimately production efficiency.

[0048] Combination Figure 6 , Figure 8 and Figure 10 In this embodiment, the DIP switch composite molding injection mold 20 also includes two guide plates 26 and two linkage rods 262. The two guide plates 26 are located at both ends of the fixed mold core 221 in the X-axis direction, and each guide plate 26 has a limiting channel 261 extending through it in the X-axis direction. The metal strip 30 moves through the two limiting channels 261 in the X-axis direction. The first end of one linkage rod 262 is connected to the lifting plate 23, and the second end of the linkage rod 262 extends out of the mold closing side of the fixed mold plate 22 and is connected to one guide plate 26. Thus, when the lifting plate 23 drives the lifting rod 225 to drive the metal strip 30 to move in the Z-axis direction, the lifting plate 23 simultaneously drives the guide plate 26 to drive the metal strip 30 to move in the Z-axis direction through the linkage rod 262, thereby making the metal strip 30 move smoothly in the Z-axis direction and further improving the feeding stability and accuracy of the metal strip 30.

[0049] Specifically, in this embodiment, there are two pre-positioning mechanisms. One pre-positioning mechanism is set in the X-axis direction on the feed side of a guide plate 26 away from the fixed mold core 221. The pin insertion end 2511 of the positioning pin 251 passes through the mold closing side of the fixed mold plate 22 and the guide plate 26 in sequence and can be inserted into the first positioning hole 301 of the metal strip 30, thereby further improving the feeding stability and accuracy of the metal strip 30.

[0050] Combination Figures 13 to 17 In this embodiment, the first opening 22511 of the chute 2251 in the X-axis direction is set in an outward V-shape, and the second opening 22512 of the chute 2251 in the X-axis direction is set in an outward V-shape, so that the guide plate 26 can quickly enter the chute 2251 and move smoothly and stably within the chute 2251 to feed materials.

[0051] Combination Figure 18 and Figure 21 In this embodiment, the injection molding cavity 27 includes a main body cavity 271, a first flow channel cavity 272, and a second flow channel cavity 273 that are connected to each other. The first flow channel cavity 272 is connected to the glue inlet channel 215 of the moving template 21, and the first flow channel cavity 272 extends in a long strip shape and is connected to the first side frame of the metal strip 30. The second flow channel cavity 273 extends in a long strip shape and is connected to the second side frame of the metal strip 30. The first flow channel cavity 272 and the second flow channel cavity 273 are arranged opposite to each other in the Y-axis direction, and the first metal spring 12 and the second metal spring 13 are arranged opposite to each other in the X-axis direction. Thus, the main cavity 271 is injection molded to form the switch plastic body 11, the first runner cavity 272 is injection molded to form the first support arm 31, and the second runner cavity 273 is injection molded to form the second support arm 32. This allows the switch plastic body 11 to be supported on the frame of the metal strip 30 in the Y-axis direction by the first support arm 31 and the second support arm 32. This avoids deformation of the switch plastic body 11 during demolding due to the elastic deformation capability of the metal spring and the small size of the switch plastic body 11, thereby improving production accuracy and production quality.

[0052] To ensure demolding quality, the injection mold 20 for the DIP switch composite molding in this embodiment also includes an ejector pin 28, an ejector plate 24, and a spring 241. The ejector plate 24 is movably disposed on the side of the lifting plate 23 away from the fixed mold plate 22 in the Z-axis direction. The mounting end of the ejector pin 28 is connected to the ejector plate 24, and the ejector end of the ejector pin 28 passes through the lifting plate 23, the fixed mold plate 22, and the fixed mold core 221 in sequence and connects with the main cavity 271 of the body. The spring 241 abuts against the fixed mold plate 22 and the ejector plate 24. Thus, while the lifting plate 23 moves along the Z-axis towards the fixed mold plate 22 to demold the injection-molded metal strip 30, the ejector plate 24 is controlled to move along the Z-axis towards the fixed mold plate 22 to drive the ejector end of the ejector pin 28 to eject the switch plastic body 11 formed in the main cavity 271 of the body for demolding, ensuring smooth demolding of the switch plastic body 11 and improving production accuracy and quality. After the demolding operation is completed, the power to control the ejector plate 24 is canceled. Then, under the elastic restoring force of the spring 241, the ejector plate 24 is forced to move the ejector rod 28 away from the metal strip 30 and reset. Then the metal strip 30 can be fed.

[0053] Furthermore, in this embodiment, there are multiple first metal springs 12 and multiple second metal springs 13. One first metal spring 12 is positioned opposite one second metal spring 13 in the X-axis direction. Therefore, there are multiple ejector pins 28 in this embodiment. One ejector pin 28 is positioned corresponding to one first metal spring 12 in the X-axis direction and located in the middle between the first metal spring 12 and the second metal spring 13, thereby preventing deformation of any metal spring during demolding and improving production accuracy and quality. In addition, in this embodiment, the mold-closing side of the fixed mold core 221 has multiple first positioning platforms 226 and multiple second positioning platforms 227 protruding in the Z-axis direction. One first positioning platform 226 can be inserted into the first gap between two adjacent first metal springs 12, and one second positioning platform 227 can be inserted into the second gap between two adjacent second metal springs 13 to position the metal springs, further improving production accuracy and quality.

[0054] To further improve production precision and quality, the DIP switch composite molding injection mold 20 in this embodiment also includes a first positioning pin 214. The mounting end of the first positioning pin 214 is connected to the moving mold plate 21. The positioning end of the first positioning pin 214 extends through the moving mold core 211 in the Z-axis direction and can be inserted into the second positioning hole 302 of the metal strip 30 to accurately position the metal strip 30. In addition, the DIP switch composite molding injection mold 20 in this embodiment also includes a second positioning pin 224. The mounting end of the second positioning pin 224 is connected to the fixed mold plate 22. The positioning end of the second positioning pin 224 extends through the fixed mold core 221 in the Z-axis direction and can be inserted into the third positioning hole 303 of the metal strip 30 to accurately position the metal strip 30.

[0055] To further improve production precision and quality, the DIP switch composite molding injection mold 20 in this embodiment also includes a first positioning rod 213. The mounting end of the first positioning rod 213 is connected to the moving template 21. The positioning end of the first positioning rod 213 extends in the Z-axis direction and protrudes from the moving template 21. A first positioning groove 223 is provided on the mold closing side of the fixed template 22. The positioning end of the first positioning rod 213 can be inserted into the first positioning groove 223 to accurately position the moving template 21 and the fixed template 22 during the mold closing process. Furthermore, the DIP switch composite molding injection mold 20 in this embodiment also includes a second positioning rod 228. The mounting end of the second positioning rod 228 is connected to the fixed template 22. The positioning end of the second positioning rod 228 extends in the Z-axis direction and protrudes from the fixed template 22. A second positioning groove 215 is provided on the mold closing side of the moving template 21. The positioning end of the second positioning rod 228 can be inserted into the second positioning groove 215 to accurately position the moving template 21 and the fixed template 22 during the mold closing process.

[0056] To further improve production precision and quality, the injection mold 20 for the DIP switch composite molding in this embodiment also includes a guide rod 29. The mounting end of the guide rod 29 is connected to the moving template 21, and the guide end of the guide rod 29 protrudes from the moving template 21. The fixed template 22 has a through guide hole 291 in the Z-axis direction, and the guide hole 291 is slidably fitted onto the guide end of the guide rod 29. Thus, the guide rod 29 is designed to precisely guide the moving template 21 and the fixed template 22 during mold opening and closing operations.

[0057] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A dial switch composite forming injection mold, comprising a movable die plate and a fixed die plate, the movable die plate is movable toward or away from the fixed die plate in the Z-axis direction, a movable die core of the movable die plate and a fixed die core of the fixed die plate can form an injection cavity, a metal strip is movably located between the movable die plate and the fixed die plate in the X-axis direction, and a first metal spring and a second metal spring of the metal strip are respectively inserted into the injection cavity, characterized in that: the dial switch composite forming injection mold further comprises two lifting rods, a lifting plate and a pre-positioning mechanism, the lifting plate is movably arranged on the side of the fixed die plate away from the movable die plate in the Z-axis direction, the two lifting rods are symmetrically arranged about the injection cavity in the Y-axis direction, the first end of the lifting rod is connected with the lifting plate, the second end of the lifting rod penetrates out of the clamping side of the fixed die plate close to the movable die plate, and the second end of the lifting rod close to the outer peripheral surface of the injection cavity is provided with a sliding groove in the X-axis direction, and the opposite ends of the metal strip in the Y-axis direction are respectively arranged in the two sliding grooves. The pre-positioning mechanism comprises a touch switch, a compression spring and a positioning pin, the fixed die plate is provided with a limiting groove, the pin shoulder end of the positioning pin is movably located in the limiting groove in the Z-axis direction, the pin insertion end of the positioning pin penetrates out of the clamping side of the fixed die plate and can be inserted into the first positioning hole of the metal strip, the compression spring is located in the limiting groove and abuts between the pin shoulder end and the groove bottom surface of the limiting groove, the outer peripheral surface of the pin shoulder end is concave and provided with a circular arc ring groove, the touch switch is arranged on the fixed die plate, and the touch rod of the touch switch is telescopically movably inserted into the limiting groove, so that the circular arc end of the touch rod can be inserted into or separated from the circular arc ring groove.

2. The dial switch composite forming injection mold according to claim 1, characterized in that: the dial switch composite forming injection mold further comprises two material guide plates and two linkage rods, the two material guide plates are respectively located at the two ends of the fixed die core in the X-axis direction, and each material guide plate is provided with a limiting channel in the X-axis direction, the metal strip is movably arranged through the two limiting channels in the X-axis direction, the first end of one linkage rod is connected with the lifting plate, and the second end of one linkage rod penetrates out of the clamping side of the fixed die plate and is connected with one material guide plate.

3. The dial switch composite forming injection mold according to claim 2, characterized in that: the number of pre-positioning mechanisms is two, one pre-positioning mechanism is arranged on the in-out material side of one material guide plate away from the fixed die core in the X-axis direction, and the pin insertion end of the positioning pin penetrates out of the clamping side of the fixed die plate and the material guide plate in turn and can be inserted into the first positioning hole of the metal strip.

4. The dial switch composite forming injection mold according to claim 1, characterized in that: the first opening of the sliding groove in the X-axis direction is outwardly expanded V-shaped; and / or, the second opening of the sliding groove in the X-axis direction is outwardly expanded V-shaped. ​ ​ ​ ​ ​ 5. The dial switch composite injection molding mold of claim 1, wherein: the injection cavity comprises a body main cavity, a first runner cavity and a second runner cavity in communication, the first runner cavity is in communication with the glue inlet channel of the movable mold plate, and the first runner cavity extends in a strip shape and is connected with the first side frame of the metal strip, and the second runner cavity extends in a strip shape and is connected with the second side frame of the metal strip; the first runner cavity and the second runner cavity are oppositely arranged in the Y-axis direction, and the first metal spring and the second metal spring are oppositely arranged in the X-axis direction.

6. The dial switch composite injection molding mold of claim 5, wherein: the dial switch composite injection molding mold further comprises a ejector rod, a ejector pin plate and a spring, the ejector pin plate is movably arranged on the side of the lifting plate away from the fixed mold plate in the Z-axis direction, the mounting end of the ejector rod is connected with the ejector pin plate, the ejection end of the ejector rod passes through the lifting plate, the fixed mold plate and the fixed mold core in sequence and is connected with the body main cavity, and the spring is abutted between the fixed mold plate and the ejector pin plate.

7. The dial switch composite injection molding mold of claim 6, wherein: the number of the first metal spring and the second metal spring is multiple, and one first metal spring is oppositely arranged with one second metal spring in the X-axis direction; the number of the ejector rod is multiple, and one ejector rod is correspondingly arranged with one first metal spring in the X-axis direction and is located at the middle part between the first metal spring and the second metal spring; and / or, the clamping side of the fixed mold core is protrusively arranged with multiple first positioning tables and multiple second positioning tables in the Z-axis direction, one first positioning table can be inserted into the first gap between two adjacent first metal springs, and one second positioning table can be inserted into the second gap between two adjacent second metal springs.

8. The dial switch composite injection molding mold of claim 1, wherein: the dial switch composite injection molding mold further comprises a first positioning pin, the mounting end of the first positioning pin is connected with the movable mold plate, and the positioning end of the first positioning pin extends out of the movable mold core in the Z-axis direction and can be inserted into the second positioning hole of the metal strip; and / or, the dial switch composite injection molding mold further comprises a second positioning pin, the mounting end of the second positioning pin is connected with the fixed mold plate, and the positioning end of the second positioning pin extends out of the fixed mold core in the Z-axis direction and can be inserted into the third positioning hole of the metal strip.

9. The dial switch composite injection molding mold of claim 1, wherein: the dial switch composite injection molding mold further comprises a first positioning rod, the mounting end of the first positioning rod is connected with the movable mold plate, the positioning end of the first positioning rod extends out of the movable mold plate in the Z-axis direction, the clamping side of the fixed mold plate is provided with a first positioning groove, and the positioning end of the first positioning rod can be inserted into the first positioning groove. ​ ​ ​ ​ ​ ​ ​ ​ ​ And / or, the dial switch composite injection mold further comprises a second positioning rod, the mounting end of the second positioning rod is connected with the fixed mold plate, the positioning end of the second positioning rod extends in the Z-axis direction and protrudes from the fixed mold plate, a second positioning groove is arranged on the closing side of the movable mold plate, and the positioning end of the second positioning rod can be inserted into the second positioning groove.

10. The dial switch composite injection mold according to any one of claims 1 to 9, characterized in that: The dial switch composite injection mold further comprises a guide rod, the mounting end of the guide rod is connected with the movable mold plate, the guide end of the guide rod protrudes from the movable mold plate, and a guide hole is arranged in the Z-axis direction through the fixed mold plate, the guide hole can be slidably sleeved on the guide end of the guide rod.

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