A two-color injection mold for electronic parts and injection molding method

Abstract

The present invention relates to an electronic component two-color injection mold and an injection molding method, belonging to the technical field of injection molding. The electronic component two-color injection mold comprises a mold core, the mold core is provided with a glue feeding cavity and a mold cavity, the glue feeding cavity is connected with the mold cavity, a cutter is slidably penetrated on the mold core, the sliding direction of the cutter is perpendicular to the plane where the glue feeding cavity is located, the cutter is aligned with the intersection of the glue feeding cavity and the mold cavity, and a driving member for driving the cutter to slide is provided on the mold core. The present invention has the effect of facilitating the removal of the material head on the first color product, and it is not easy for the second color injection material of the subsequent injection molding to be wrapped on the material head and make it difficult to remove.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a two-color injection mold for electronic parts and an injection molding method. Background Art

[0002] At present, two-color injection molding products are increasingly used in the shells of electronic parts such as notebooks. The two-color shell injection molding process usually requires the use of a two-color injection mold, which forms molded parts with different colors, textures and functions through two injection operations.

[0003] Combination Figure 1 In the related art, the two-color injection mold includes a male mold and a female mold, wherein the female mold includes a mold frame 5 and a mold core 1, the mold core 1 is embedded and installed in the mold frame 5, a mold cavity 3 and a glue inlet cavity 2 are opened on the mold core 1, the glue inlet cavity 2 is connected to the mold cavity 3, and the mold frame 5 and the mold core 1 are both opened with mutually connected glue inlets, which are connected to the glue inlet cavity 2. When in use, the female mold is first matched with the male mold, and the first color injection material is injected into the glue inlet to complete the first shot. The first color injection material enters the mold cavity 3 through the glue inlet cavity 2. After molding, the mold is opened, and the female mold drives the first color product to flip and translate, and the second shot is performed.

[0004] With respect to the above-mentioned related technologies, a slug will be formed in the injection cavity 2 of the mother mold during the first shot process, and during the second shot process, the second color injection molding material will wrap the slug, which increases the difficulty of removing the slug later. Summary of the invention

[0005] In order to facilitate the removal of the material head on the first color product and prevent the second color injection material from being wrapped around the material head and making it difficult to remove, the present invention provides an electronic component two-color injection mold and an injection molding method.

[0006] In the first aspect, the present invention provides a two-color injection mold for electronic parts, which adopts the following technical solution:

[0007] A two-color injection mold for electronic parts includes a mold core, a glue inlet cavity and a mold cavity are provided on the mold core, the glue inlet cavity is communicated with the mold cavity, a cutter is slidably penetrated on the mold core, the sliding direction of the cutter is perpendicular to the plane where the glue inlet cavity is located, the cutter is aligned with the intersection of the glue inlet cavity and the mold cavity, and a driving member for driving the cutter to slide is provided on the mold core.

[0008] Preferably, when the mold core is in a glue-injecting state, the side of the cutter close to the glue-injecting cavity is located in the glue-injecting cavity, and the length of the cutter extending out of the mold core is less than the depth of the glue-injecting cavity.

[0009] Preferably, the two-color injection mold further comprises a mold frame, wherein the mold frame is arranged on a side of the mold core away from the mold cavity, and the driving member comprises a first hydraulic cylinder arranged in the mold frame, wherein the first hydraulic cylinder is used to drive the cutter to slide.

[0010] Preferably, a fixed seat is connected to the piston rod of the first hydraulic cylinder, and the side of the cutter away from the glue inlet cavity is connected to the fixed seat. A first spring is arranged between the fixed seat and the mold core, and the first spring is used to push the fixed seat to drive the cutter to slide in a direction away from the glue inlet cavity.

[0011] Preferably, a second hydraulic cylinder is provided in the mold frame, the second hydraulic cylinder is located on the side of the first hydraulic cylinder away from the mold cavity, the piston rod of the second hydraulic cylinder is slidably penetrated on the mold core, and the second hydraulic cylinder is used to push out the material head.

[0012] Preferably, a guide strip is embedded on a side of the mold core close to the glue inlet cavity, and the guide strip is located on a side of the cutter away from the mold cavity, and the side of the cutter away from the mold cavity is in sliding contact with the guide strip.

[0013] Preferably, a sliding block is slidably provided on the side of the guide bar away from the glue inlet cavity, the sliding direction of the sliding block is parallel to the length direction of the cutter, a connecting rod is provided on the sliding block, the connecting rod extends in the direction close to the cutter, a plurality of silk threads are distributed on the surface of the connecting rod, a tension sensor is provided on the sliding block, one end of the silk thread is connected to the tension sensor, and the other end is connected to the side of the connecting rod away from the sliding block, the tension sensor is wirelessly connected to an external controller, the silk thread on the connecting rod is used to slide and abut against the blade of the cutter, and a sliding component for adjusting the sliding block to drive the connecting rod to slide is provided on the guide bar.

[0014] Preferably, the sliding assembly includes a second spring arranged on the guide bar, a third spring arranged on the sliding block, a pull rope arranged on the third spring and a retractable member arranged on the guide bar, the second spring is used to pull the sliding block to slide toward one end of the guide bar, the third spring is located on a side of the sliding block away from the second spring, the third spring is used to pull the sliding block to slide toward a side away from the second spring, the elastic force of the third spring is greater than the elastic force of the second spring, the pull rope is connected to an end of the third spring away from the sliding block, the retractable member is located on a side of the guide bar away from the second spring, the retractable member is used to reel in or unreel the pull rope, and when the pull rope is in a relaxed state, the sliding block is located on a side of the cutter close to the second spring.

[0015] Preferably, the retractable component includes a reel, a gear, a rack, a first Velcro, a second Velcro, a first magnet and a second magnet, the reel is rotatably arranged on the guide strip, the reel is located on the side of the guide strip away from the second spring, the end of the pull rope away from the third spring is wound around the reel, the gear is coaxially connected to the reel, the rack is slidably penetrated on the guide strip, the sliding direction of the rack is parallel to the sliding direction of the cutter, the rack is meshed with the gear, the first Velcro is arranged on the cutter, the second Velcro is arranged on the rack, the first Velcro is located on the side of the second Velcro away from the glue inlet cavity, and the first Velcro is used to bond the second Velcro to drive the rack towards the direction away from the glue inlet cavity The rack is configured to slide in the direction of the glue inlet cavity, and the bonding force between the first Velcro and the second Velcro is greater than the elastic force of the third spring. When the rack slides in the direction away from the glue inlet cavity, the rack drives the gear to rotate to cause the reel to reel in the pull rope. The first magnet is arranged on the sliding block, and the second magnet is arranged on the rack. The first magnet is located on the side of the second magnet close to the glue inlet cavity. The first magnet is used to adsorb the second magnet to drive the rack to slide in the direction close to the glue inlet cavity. The adsorption force between the first magnet and the second magnet is greater than the bonding force between the first Velcro and the second Velcro. When the cutter is in the state of cutting off the material head, the first Velcro and the second Velcro are bonded and matched, and the pull rope is in a relaxed state.

[0016] In a second aspect, the present invention provides a two-color injection molding method for electronic parts, which adopts the following technical solution:

[0017] A two-color injection molding method for electronic parts, using the two-color injection molding mold for electronic parts, comprises the following steps

[0018] The female mold and the male mold are combined, and the first color is injected through the injection port on the female mold. The first color injection material enters the mold cavity through the injection cavity, and the first color product is obtained after pressure holding, cooling, and solidification.

[0019] The drive member drives the cutter to move toward the glue inlet cavity, so that the cutter cuts off the material head;

[0020] Opening of female and male molds;

[0021] The master mold drives the first color product to the desired position through rotation and translation for the second color injection.

[0022] In summary, the present invention includes the following beneficial technical effects:

[0023] After the first color product is formed, the drive member drives the cutter to slide toward the direction close to the glue inlet cavity, so that the cutter cuts off the material head in the glue inlet cavity and the first color product in the mold cavity. This is convenient and quick, so that the first color product can be separated from the material head after the mold is opened, so that in the subsequent second shot process, it is not easy for the second color injection molding material to be wrapped around the material head and difficult to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the related technology.

[0025] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0026] Figure 3 It is a first partial structural cross-sectional view of an embodiment of the present invention.

[0027] Figure 4 It is a second partial structural cross-sectional view of an embodiment of the present invention.

[0028] Figure 5 It is a third partial structural sectional view of an embodiment of the present invention.

[0029] Figure 6 It is a schematic diagram of a local structure of an embodiment of the present invention.

[0030] Figure 7 yes Figure 5 Enlarged view of part A.

[0031] Explanation of the reference numerals: 1. mold core; 2. glue inlet cavity; 3. mold cavity; 4. cutter; 41. connecting part; 42. cutting part; 5. mold frame; 6. first hydraulic cylinder; 7. fixing seat; 8. first spring; 9. second hydraulic cylinder; 10. guide strip; 11. sliding block; 12. connecting rod; 13. silk thread; 14. tension sensor; 15. second spring; 16. third spring; 17. pull rope; 18. reel; 19. gear; 20. rack; 21. first Velcro; 22. second Velcro; 23. first magnet; 24. second magnet; 25. sliding cavity; 26. mounting cavity; 27. mounting plate; 28. mounting hole; 29. ​​avoidance groove; 30. slide groove; 31. guide pulley; 32. fixed cavity; 33. support plate. DETAILED DESCRIPTION

[0032] The following combination Figure 2-Figure 7 The present invention is described in further detail.

[0033] The embodiment of the present invention discloses a two-color injection mold for electronic parts. Figure 2 and Figure 3The electronic component two-color injection mold includes a mold frame 5 and a mold core 1. The mold core 1 is embedded and installed on the mold frame 5. A glue inlet cavity 2 and a mold cavity 3 are opened on a side of the mold core 1 away from the mold frame 5. The glue inlet cavity 2 is connected to the mold cavity 3, and the glue inlet cavity 2 is used to communicate with a glue inlet port.

[0034] Reference Figure 2 and Figure 3 A sliding cavity 25 is provided on the mold core 1, and the sliding cavity 25 is aligned with the intersection of the glue inlet cavity 2 and the mold cavity 3. A cutter 4 is slidably penetrated in the sliding cavity 25, and the sliding direction of the cutter 4 is perpendicular to the plane where the glue inlet cavity 2 is located, so that the cutter 4 is aligned with the intersection of the glue inlet cavity 2 and the mold cavity 3, and a driving member for driving the cutter 4 to slide is provided on the mold frame 5.

[0035] After the first color product is formed, the drive member drives the cutter 4 to slide toward the direction close to the glue inlet cavity 2, so that the cutter 4 cuts off the material head in the glue inlet cavity 2 and the first color product in the mold cavity 3, so that the first color product can be separated from the material head after the mold is opened, which is convenient and quick, and it is not easy for the second color injection material of the subsequent injection to be wrapped around the material head and difficult to remove.

[0036] Reference Figure 3 and Figure 4 A mounting cavity 26 is provided on a side of the mold frame 5 close to the mold core 1, and a mounting plate 27 is connected in the mounting cavity 26 by bolts. The mounting plate 27 is located on a side of the cutter 4 away from the glue feeding cavity 2. The driving member includes a first hydraulic cylinder 6, which is fixedly mounted on a side of the mounting plate 27 away from the cutter 4. The first hydraulic cylinder 6 is located in the mounting cavity 26. In the embodiment of the present invention, a plurality of first hydraulic cylinders 6 are provided, and the plurality of first hydraulic cylinders 6 are arranged at intervals along the length direction of the mounting plate 27. A fixing seat 7 is commonly connected to the piston rods of the plurality of first hydraulic cylinders 6. The side of the cutter 4 away from the glue feeding cavity 2 is fixedly connected to the fixing seat 7. A fixing cavity 32 slidably matched with the fixing seat 7 is provided on the mold core 1, and the fixing cavity 32 is connected to the sliding cavity 25. The width of the fixing cavity 32 is greater than the width of the sliding cavity 25. The first hydraulic cylinder 6 is wirelessly connected to an external controller so as to control the first hydraulic cylinder 6 to drive the cutter 4 to move and cut off the material head before the mold is opened.

[0037] When it is necessary to cut off the material head, multiple first hydraulic cylinders 6 are started to synchronously drive the fixed seat 7 to drive the cutter 4 to slide toward the glue feeding cavity 2, so that the cutter 4 cuts off the material head. Then, multiple first hydraulic cylinders 6 synchronously drive the cutter 4 to slide in the direction away from the glue feeding cavity 2, so that the glue feeding cavity 2 is connected with the mold cavity 3, which is helpful for the next glue feeding.

[0038] Reference Figure 3 and Figure 4When the mold core 1 is in the glue feeding state, the cutter 4 is located in the glue feeding cavity 2 on one side close to the glue feeding cavity 2, and the length of the cutter 4 extending out of the mold core 1 is less than the depth of the glue feeding cavity 2, so that the cutter 4 becomes a part of the inner wall of the glue feeding cavity 2, and a small glue feeding channel is formed between the cutter 4 and the mold cavity 3 on the male mold, which is convenient for the cutter 4 to cut off the material head.

[0039] Reference Figure 3 and Figure 4 A plurality of mounting holes 28 are provided on the side of the fixing seat 7 close to the cutter 4. A first spring 8 is fixed between the bottom wall of the mounting hole 28 and the inner wall of the fixing cavity 32. The first spring 8 corresponds to the mounting hole 28 one by one. The extension direction of the first spring 8 is parallel to the sliding direction of the cutter 4. The first spring 8 is used to push the fixing seat 7 to drive the cutter 4 to slide in a direction away from the glue inlet cavity 2. The setting of the first spring 8 can provide a buffer for the cutter 4 to cut off the material head on the one hand. On the other hand, after the first hydraulic cylinder 6 returns oil, the thrust of the first spring 8 can quickly push the fixing seat 7 to drive the cutter 4 to move to the desired position in a direction away from the glue inlet cavity 2, thereby shortening the time and helping to improve production efficiency.

[0040] Reference Figure 3 and Figure 4 , a second hydraulic cylinder 9 is fixedly mounted on the mounting plate 27, the second hydraulic cylinder 9 is located in the mounting cavity 26, the second hydraulic cylinder 9 is located on the side of the first hydraulic cylinder 6 away from the mold cavity 3, the piston rod of the second hydraulic cylinder 9 is slidably penetrated on the mold core 1, and the second hydraulic cylinder 9 is used to push out the material head. In the embodiment of the present invention, two second hydraulic cylinders 9 are provided, which helps to improve the material pushing effect. When the mold core 1 is in the glue feeding state, the piston rod of the second hydraulic cylinder 9 is flush with the inner wall of the glue feeding cavity 2, so that the piston rod of the second hydraulic cylinder 9 is a part of the inner wall of the glue feeding cavity 2, ensuring that the glue feeding material flows to the mold cavity 3. After the mold is opened, the material head is pushed by the second hydraulic cylinder 9, which helps to push the material head out of the glue feeding cavity 2, which is simple and convenient, and is convenient for the next glue feeding. Specifically, the first hydraulic cylinder 6 and the second hydraulic cylinder 9 in the present invention are both hydraulic cylinders.

[0041] Reference Figure 3 and Figure 4 A guide strip 10 is detachably embedded on the side of the mold core 1 close to the glue inlet cavity 2 through bolts. The guide strip 10 is located between the cutter 4 and the piston rod of the second hydraulic cylinder 9, so that the guide strip 10 is located on the side of the cutter 4 away from the mold cavity 3. An avoidance groove 29 is provided on the side of the guide strip 10 close to the cutter 4. The cutter 4 slides through the avoidance groove 29, and the side of the cutter 4 away from the mold cavity 3 slides against the inner wall of the avoidance groove 29. The setting of the guide strip 10 helps to guide the sliding of the cutter 4, so that the lower end of the cutter 4 is not easily bent or deformed.

[0042] Reference Figure 4 and Figure 5Specifically, the cutter 4 includes a connecting portion 41 and a cutting portion 42. The connecting portion 41 is fixedly connected to the fixing seat 7. The cutting portion 42 is integrally formed on the side of the connecting portion 41 close to the glue inlet cavity 2. The thickness of the cutting portion 42 is less than that of the connecting portion 41. On the one hand, the connection with the fixing seat 7 is strengthened. On the other hand, the cutting portion 42 is relatively thin, which facilitates the cutting of the material head by the cutting portion 42. The cutting portion 42 is flush with the side of the connecting portion 41 away from the guide bar 10. The connecting portion 41 is located on the side of the guide bar 10 away from the glue inlet cavity 2 (refer to Figure 3 ) and have a certain gap, so that the side of the guide strip 10 close to the cutter 4 is located in the sliding cavity 25 (refer to Figure 3 The side of the cutting portion 42 away from the connecting portion 41 is an inclined surface, which further facilitates the cutting of the material head.

[0043] Reference Figure 3 and Figure 5 A sliding block 11 is slidably provided on the side of the guide strip 10 away from the glue inlet cavity 2. The sliding block 11 is located in the sliding cavity 25. The sliding block 11 is located on the side of the connecting portion 41 close to the glue inlet cavity 2. The sliding block 11 is located on the side of the cutting portion 42 away from the mold cavity 3. The cross section of the sliding block 11 is L-shaped. The sliding direction of the sliding block 11 is parallel to the length direction of the cutter 4. The guide strip 10 is provided with a sliding groove 30 that slidably cooperates with the sliding block 11. The sliding cooperation between the sliding block 11 and the sliding groove 30 helps to guide the sliding of the sliding block 11, and at the same time, the sliding block 11 and the guide strip 10 are not easily separated.

[0044] Reference Figure 5 and Figure 6 A connecting rod 12 is fixed on the side of the sliding block 11 close to the cutter 4. The connecting rod 12 extends in the direction close to the cutting part 42. The side of the connecting rod 12 away from the sliding block 11 is flush with the side of the connecting part 41 away from the guide bar 10. A plurality of threads 13 are distributed on the surface of the connecting rod 12. A tension sensor 14 is embedded on the side of the sliding block 11 close to the connecting rod 12. The tension sensor 14 is arranged along the circumference of the connecting rod 12. Specifically, one end of each thread 13 is fixed on the tension sensor 14, and the other end is fixed on the side of the connecting rod 12 away from the sliding block 11. The thread 13 can be one of wool, fiber, elastic, etc., so that the thread 13 is attached to the surface of the connecting rod 12. The tension sensor 14 is wirelessly connected to the external controller. The thread 13 on the connecting rod 12 is used to slide against the blade of the cutter 4. The guide bar 10 is provided with a sliding component for adjusting the sliding block 11 to drive the connecting rod 12 to slide.

[0045] Reference Figure 5 and Figure 6In order to facilitate the adjustment of the sliding block 11 to drive the connecting rod 12 to slide, the length of the sliding groove 30 is greater than the length of the cutter 4. The sliding assembly includes a second spring 15, a third spring 16, a pull rope 17 and a retractable member. The second spring 15 is located in the sliding groove 30. The extension direction of the second spring 15 is parallel to the sliding direction of the sliding block 11. One end of the second spring 15 is fixed on the inner wall of the sliding groove 30, and the other end is fixed on the sliding block 11. The second spring 15 is used to pull the sliding block 11 to slide toward one end of the guide bar 10. The third spring 16 is also located in the sliding groove 30, and the third spring 16 is located on the side of the sliding block 11 away from the second spring 15. The extension direction of the third spring 16 is parallel to the sliding direction of the sliding block 11. One end of the third spring 16 close to the second spring 15 is fixedly connected to the sliding block 11, and the other end is connected to the pull rope 17. The third spring 16 is used to pull the sliding block 11 to slide toward the side away from the second spring 15. The elastic force of the third spring 16 is greater than the elastic force of the second spring 15. The retractable member is arranged on the guide bar 10, and is located on the side of the guide bar 10 away from the second spring 15. The retractable member is used to reel in or unreel the pull rope 17. When the pull rope 17 is in a relaxed state, the sliding block 11 is located on the side of the cutter 4 close to the second spring 15 and does not interfere with the cutter 4.

[0046] Reference Figure 5 and Figure 7 In order to facilitate the winding or unwinding of the drawstring 17, the winding and unwinding member includes a reel 18, a gear 19, a rack 20, a first Velcro 21, a second Velcro 22, a first magnet 23 (refer to Figure 6 ) and a second magnet 24, the reel 18 is rotatably arranged on the guide bar 10, and a rubber layer is provided on the shaft of the reel 18 to increase the friction, so that the reel 18 is not easy to rotate when no force is applied; the reel 18 is located on the side of the cutter 4 away from the second spring 15, and the end of the pull rope 17 away from the third spring 16 is wound around the reel 18, and a guide pulley 31 is rotatably arranged on the side of the slide groove 30 close to the reel 18, and the pull rope 17 between the third spring 16 and the reel 18 is slidably overlapped on the guide pulley 31 to guide the traction of the guide pulley 31 so that the third spring 16 will not move out of the slide groove 30.

[0047] Reference Figure 5 and Figure 7The gear 19 is coaxially fixedly sleeved on the shaft of the reel 18, the rack 20 is slidably penetrated on the guide strip 10, the length of the rack 20 is greater than the thickness of the guide strip 10, the sliding direction of the rack 20 is parallel to the sliding direction of the cutter 4, the rack 20 is meshed with the gear 19, and a support plate 33 is fixed on the side of the cutting portion 42 of the cutter 4 close to the connecting portion 41, the support plate 33 is located on the side of the rack 20 close to the fixed seat 7, the first Velcro 21 is fixed on the side of the support plate 33 close to the rack 20, and the second Velcro 22 is fixed on the side of the rack 20 close to the support plate 33, so that the first Velcro 21 is located on the side of the second Velcro 22 close to the fixed seat 7, and the first Velcro 21 is used to bond the second Velcro 22 to drive the rack 20 to move away from the glue inlet cavity 2 (refer to Figure 3 ), the bonding force between the first Velcro 21 and the second Velcro 22 is greater than the elastic force of the third spring 16. When the rack 20 slides in the direction away from the glue inlet cavity 2, the rack 20 drives the gear 19 to rotate so that the reel 18 reels the pull rope 17.

[0048] Reference Figure 5 , Figure 6 and Figure 7 The first magnet 23 is fixed on a side of the sliding block 11 close to the fixed seat 7, the second magnet 24 is fixed on the rack 20 and extends in the direction close to the second spring 15, the first magnet 23 is located on the side of the second magnet 24 away from the fixed seat 7, the first magnet 23 is used to adsorb the second magnet 24 to drive the rack 20 to slide in the direction away from the fixed seat 7, the adsorption force between the first magnet 23 and the second magnet 24 is greater than the adhesion force between the first Velcro 21 and the second Velcro 22, when the cutter 4 is in the state of cutting off the material head, the first Velcro 21 and the second Velcro 22 are bonded and matched, and the pull rope 17 is in a relaxed state.

[0049] When the cutter 4 is in use, the second spring 15 is in a natural state, the sliding block 11 is located outside the side of the cutter 4 close to the second spring 15, the drawstring 17 is in a relaxed state, and the first Velcro 21 and the second Velcro 22 are in a bonded state. When it is necessary to determine whether the cutter 4 is damaged by a notch, the first hydraulic cylinder 6 drives the fixing seat 7 to drive the cutter 4 to slide in a direction away from the glue inlet chamber 2. As the cutter 4 moves, the first Velcro 21 adheres to the second Velcro 22 to drive the rack 20 to slide in a direction away from the glue inlet chamber 2, so that the rack 20 drives the gear 19 to rotate, and the gear 19 drives the reel 18 to rotate to reel the drawstring 17. The drawstring 17 pulls the end of the third spring 16 away from the sliding block 11, so that the third spring 16 gradually stretches. At this time, the third spring 16 has a pulling force on the sliding block 11, and the connecting rod 12 abuts against the side wall of the cutting portion 42. Under the obstruction of the cutting portion 42, the sliding block 11 will not move. When the cutting portion 42 moves to the side of the connecting rod 12 away from the glue inlet chamber 2, the cutting portion 42 no longer blocks the connecting rod 12. At this time, the sliding block 11 drives the connecting rod 12 to slide toward the direction close to the reel 18 under the pulling force of the third spring 16, stretching the second spring 15, so that the silk thread 13 on the connecting rod 12 and the blade of the cutter 4 slide relative to each other. Since the silk thread 13 is only abutted by the blade of the cutter 4, the cutter 4 will not cut the silk thread 13.

[0050] If a notch appears on the blade of the cutter 4, the wire 13 on the connecting rod 12 will hook with the notch on the blade of the cutter 4. As the sliding block 11 moves, the tension of the wire 13 on the tension sensor 14 increases. When the tension on the tension sensor 14 exceeds the preset value, it proves that the cutter 4 is hooked with the wire 13. The tension sensor 14 sends a hooking signal to an external controller, thereby allowing the operator to know that a notch appears on the cutter 4 so that it can be replaced in time.

[0051] When the sliding block 11 moves to the point where the first magnet 23 is aligned with the second magnet 24 under the pulling force of the third spring 16, the first magnet 23 attracts the second magnet 24 to drive the rack 20 to slide in the direction away from the fixed seat 7, so that the rack 20 drives the gear 19 and the reel 18 to rotate in the opposite direction. At this time, the reel 18 unwinds the pull rope 17, and the pulling force of the pull rope 17 on the third spring 16 is reduced. The stretched second spring 15 pulls the sliding block 11 in the direction away from the reel 18 to the original position. If the silk thread 13 is not hooked with the blade of the cutter 4, it proves that the blade of the cutter 4 is intact. Then the cutter 4 is driven by the first hydraulic cylinder 6 to move to the use position in the direction close to the glue inlet chamber 2 and continue to be used. When the cutter 4 cuts the material head, the first Velcro 21 and the second Velcro 22 are bonded and matched again, which is convenient for the next test.

[0052] The implementation principle of the two-color injection mold for electronic parts in the embodiment of the present invention is: after the first color product in the mold cavity 3 is formed, before opening the mold, start multiple first hydraulic cylinders 6 to synchronously drive the fixed seat 7 to drive the cutter 4 to slide a certain distance toward the direction close to the glue inlet cavity 2, so that the cutter 4 cuts off the material head, which is convenient and quick. Then, multiple first hydraulic cylinders 6 synchronously drive the cutter 4 to slide to the original position in the direction away from the glue inlet cavity 2, and keep the glue inlet cavity 2 connected with the mold cavity 3; then the mother mold and the male mold are opened, and the second hydraulic cylinder 9 is started to drive the corresponding piston rod to move toward the direction of the glue inlet cavity 2 to push out the cut material head, and then the mother mold can drive the first color product to rotate and translate for second color injection, so that it is not easy for the second color injection material of the subsequent injection to be wrapped around the material head and make it difficult to remove.

[0053] The embodiment of the present invention also discloses a two-color injection molding method for electronic components. The two-color injection molding method for electronic components uses the above-mentioned two-color injection mold for electronic components, and comprises the following steps:

[0054] Step 1: The female mold and the male mold are combined to inject the first color injection material through the injection port on the female mold. The first color injection material enters the mold cavity 3 through the injection cavity 2, and the first color product is obtained after pressure holding, cooling, and curing.

[0055] Step 2: Start the first hydraulic cylinder 6 to drive the fixed seat 7 to drive the cutter 4 to move toward the direction close to the glue inlet chamber 2, so that the cutter 4 cuts off the material head, and then the first hydraulic cylinder 6 drives the fixed seat 7 to drive the cutter 4 to move away from the glue inlet chamber 2 to the original position;

[0056] Step 3: The female mold and the male mold are opened, and the second hydraulic cylinder 9 is started to drive the corresponding piston rod to move toward the direction close to the glue inlet cavity 2. The piston rod of the second hydraulic cylinder 9 pushes the material head out, and then the second hydraulic cylinder 9 drives the corresponding piston rod to move toward the direction away from the glue inlet cavity 2 to the original position;

[0057] Step 4: The master mold drives the first color product to the desired position through rotation and translation for the second color injection.

[0058] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-color injection mold for electronic parts, comprising a mold core (1), wherein the mold core (1) is provided with a glue inlet cavity (2) and a mold cavity (3), wherein the glue inlet cavity (2) and the mold cavity (3) are communicated, and characterized in that: A cutter (4) is slidably provided on the mold core (1), the sliding direction of the cutter (4) being perpendicular to the plane where the glue inlet cavity (2) is located, the cutter (4) is aligned with the intersection of the glue inlet cavity (2) and the mold cavity (3), a driving member for driving the cutter (4) to slide is provided on the mold core (1), a guide strip (10) is embedded on a side of the mold core (1) close to the glue inlet cavity (2), the guide strip (10) is located on a side of the cutter (4) away from the mold cavity (3), a side of the cutter (4) away from the mold cavity (3) is in sliding contact with the guide strip (10), a sliding block (11) is slidably provided on a side of the guide strip (10) away from the glue inlet cavity (2), the sliding direction of the sliding block (11) being parallel to the length direction of the cutter (4). The sliding block (11) is provided with a connecting rod (12), the connecting rod (12) extends in a direction close to the cutter (4), a plurality of wires (13) are distributed on the surface of the connecting rod (12), a tension sensor (14) is provided on the sliding block (11), one end of the wire (13) is connected to the tension sensor (14), and the other end is connected to a side of the connecting rod (12) away from the sliding block (11), the tension sensor (14) is wirelessly connected to an external controller, the wire (13) on the connecting rod (12) is used to slide against the blade of the cutter (4), and a sliding component is provided on the guide bar (10) for adjusting the sliding block (11) to drive the connecting rod (12) to slide, and the sliding component The invention comprises a second spring (15) arranged on the guide bar (10), a third spring (16) arranged on the sliding block (11), a pull rope (17) arranged on the third spring (16) and a retractable member arranged on the guide bar (10), wherein the second spring (15) is used to pull the sliding block (11) to slide toward one end of the guide bar (10), the third spring (16) is located on a side of the sliding block (11) away from the second spring (15), the third spring (16) is used to pull the sliding block (11) to slide toward a side away from the second spring (15), the elastic force of the third spring (16) is greater than the elastic force of the second spring (15), and the pull rope (17) is connected to a side of the third spring (16) away from the sliding block (11). The retractable member is located on a side of the guide bar (10) away from the second spring (15), and is used for reeling in or unreeling the drawstring (17). When the drawstring (17) is in a relaxed state, the sliding block (11) is located on a side of the cutter (4) close to the second spring (15). The retractable member comprises a reel (18), a gear (19), a rack (20), a first Velcro (21), a second Velcro (22), a first magnet (23) and a second magnet (24). The reel (18) is rotatably arranged on the guide bar (10). The reel (18) is located on a side of the guide bar (10) away from the second spring (15). One end of the drawstring (17) away from the third spring (16) is wound around the reel (18).The gear (19) is coaxially connected to the reel (18); the rack (20) is slidably arranged on the guide strip (10); the sliding direction of the rack (20) is parallel to the sliding direction of the cutter (4); the rack (20) is meshed with the gear (19); the first Velcro (21) is arranged on the cutter (4); the second Velcro (22) is arranged on the rack (20); the first Velcro (21) is located on a side of the second Velcro (22) away from the glue inlet cavity (2); the first Velcro (21) is used to bond the second Velcro (22) to drive the rack (20) to slide in a direction away from the glue inlet cavity (2); the bonding force between the first Velcro (21) and the second Velcro (22) is greater than the elastic force of the third spring (16); when the rack (20) is moved in a direction away from the glue inlet cavity (2), the first Velcro (21) is moved in a direction away from the glue inlet cavity (2). When sliding in the direction of the rubber inlet cavity (2), the rack (20) drives the gear (19) to rotate so that the reel (18) reels the pull rope (17); the first magnet (23) is arranged on the sliding block (11), and the second magnet (24) is arranged on the rack (20); the first magnet (23) is located on the side of the second magnet (24) close to the rubber inlet cavity (2); the first magnet (23) is used to adsorb the second magnet (24) to drive the rack (20) to slide in the direction close to the rubber inlet cavity (2); the adsorption force between the first magnet (23) and the second magnet (24) is greater than the bonding force between the first Velcro (21) and the second Velcro (22); when the cutter (4) is in the state of cutting the material head, the first Velcro (21) and the second Velcro (22) are bonded and matched, and the pull rope (17) is in a relaxed state.

2. The electronic component two-color injection mold according to claim 1, characterized in that: When the mold core (1) is in a glue-injecting state, the side of the cutter (4) close to the glue-injecting cavity (2) is located in the glue-injecting cavity (2), and the length of the cutter (4) extending out of the mold core (1) is less than the depth of the glue-injecting cavity (2).

3. The electronic component two-color injection mold according to claim 1, characterized in that: The two-color injection mold further comprises a mold frame (5), wherein the mold frame (5) is arranged on a side of the mold core (1) away from the mold cavity (3), and the driving member comprises a first hydraulic cylinder (6) arranged in the mold frame (5), wherein the first hydraulic cylinder (6) is used to drive the cutter (4) to slide.

4. The electronic component two-color injection mold according to claim 3, characterized in that: A fixed seat (7) is connected to the piston rod of the first hydraulic cylinder (6); a side of the cutter (4) away from the glue inlet cavity (2) is connected to the fixed seat (7); a first spring (8) is provided between the fixed seat (7) and the mold core (1); the first spring (8) is used to push the fixed seat (7) to drive the cutter (4) to slide in a direction away from the glue inlet cavity (2).

5. The electronic component two-color injection mold according to claim 3, characterized in that: A second hydraulic cylinder (9) is arranged in the mold frame (5). The second hydraulic cylinder (9) is located on a side of the first hydraulic cylinder (6) away from the mold cavity (3). The piston rod of the second hydraulic cylinder (9) is slidably inserted into the mold core (1). The second hydraulic cylinder (9) is used to push out the material head.

Images