Injection molding process and injection molding equipment for FPC (Flexible Printed Circuit) connector

Abstract

The invention relates to the field of FPC connector production, and provides an injection molding process and injection molding equipment for an FPC connector, and the injection molding equipment for the FPC connector comprises a charging barrel, a material conveying driving assembly, a filtering piece and a particle processing assembly; the conveying driving assembly is connected with the charging barrel; the filtering part is arranged in the charging barrel and connected with the charging barrel, the filtering part is tightly attached to the inner wall of the charging barrel, and the filtering part is used for filtering particles in materials; the particle processing assembly comprises a driving unit and a rolling part, the rolling part is arranged in the charging barrel, and the driving unit is connected with the rolling part and used for driving the rolling part to roll particles on the filtering part. The problem that particles or bubbles exist in materials is solved.

Description

Technical Field

[0001] The present application relates to the field of FPC connector production, and in particular to an injection molding process and injection molding equipment for an FPC connector. Background Art

[0002] In automotive FPC (Flexible Printed Circuit board), connectors are needed to connect two active devices. FPC connectors are electronic components for transmission and exchange of current or optical signals between electronic system devices. FPC connectors are mainly divided into: electrical connectors, microwave connectors, optical connectors and fluid connectors.

[0003] The FPC connector has a metal conductive part and a plastic insulating part. The plastic insulating part is usually prepared by dispensing glue using a glue dispenser. However, the dispensing efficiency of the glue dispenser is slow, and bubbles are easily present in the glue, resulting in defects in the finished product. There are also examples of preparing the insulating part of the connector by injection molding. However, when the injection molding machine is injecting, there may also be bubbles or incompletely melted particles inside the material, which can easily lead to defects in the final product. Summary of the invention

[0004] In order to solve the problem of particles or bubbles in the material, the present application provides an injection molding process and injection molding equipment for an FPC connector.

[0005] In a first aspect, the present application provides an injection molding device for an FPC connector, including a barrel, a material delivery drive assembly, a filter element, and a particle processing assembly; The material feeding drive assembly is connected to the barrel; The filter element is arranged inside the barrel and connected to the barrel, the filter element is closely fitted to the inner wall of the barrel, and the filter element is used to filter particulate matter in the material; The particle processing component includes a driving unit and a rolling piece. The rolling piece is arranged in the barrel. The driving unit is connected to the rolling piece and is used to drive the rolling piece to roll the particles on the filter element.

[0006] By adopting the above technical solution, the FPC connector injection molding equipment can effectively filter particles in the material, break bubbles in the material, and improve product quality. Specifically: 1. The filter element is installed inside the barrel and fits tightly with the inner wall of the barrel, thereby effectively filtering the particles in the material.

[0007] 2. When the material passes through the filter holes of the filter element, it will be squeezed, thereby breaking the bubbles in the material and separating the gas in the material from the material.

[0008] 3. The particle processing component includes a driving unit and a rolling piece. The rolling piece can move in the barrel under the action of the driving unit to effectively roll the particles on the filter element, thereby crushing the materials in the particles that have not been completely melted.

[0009] Preferably, the filter element has a hemispherical surface, and a first filter hole is provided on the hemispherical surface; The driving unit comprises a driving member, a rotating shaft and a rolling member, wherein the rolling member is arranged in the barrel and connected to the rotating shaft, the rotating shaft is rotatably connected to the barrel, and one end of the rotating shaft passes through the barrel and is connected to the driving member; The rolling element has a rolling portion for rolling the particles, the rolling portion is in an arc shape, and along the rotation direction of the shaft, the distance between the rolling portion and the hemispherical surface gradually increases.

[0010] By adopting the above technical solution, the hemispherical surface design of the filter element enables more first filter holes to be set on the filter element, thereby making the material flow smoother. At the same time, the first filter holes can effectively intercept particulate matter and improve the filtration efficiency. The drive member, rotating shaft and rolling member in the drive unit work together to ensure that the rolling member can efficiently perform rolling operations in the barrel. The rolling part is designed in an arc shape, and along the rotation direction of the rotating shaft, the distance between the rolling part and the hemispherical surface gradually increases, so that the material can easily enter the gap between the rolling part and the hemispherical surface and be fully rolled, thereby improving the uniformity and efficiency of particle processing.

[0011] Preferably, the rolling portion is provided with rolling ribs.

[0012] By adopting the above technical solution, the rolling ribs set on the rolling part can improve the crushing efficiency and refinement of particles during the rolling process. This helps to ensure that the material is more uniform and fine, and improves the quality stability of the final product. At the same time, the design of the rolling ribs also increases wear resistance and extends the service life of the equipment.

[0013] Preferably, the particle processing assembly further comprises a scraper, wherein the scraper is connected to the rotating shaft and can be rotated to slidably fit with the hemispherical surface.

[0014] By adopting the above technical solution, the scraper is connected to the rotating shaft and can be rotated to slidably fit with the hemispherical surface, so that when the rotating shaft drives the rolling member to move, the scraper can effectively remove the residual particles on the filter element, avoid clogging the first filter hole, and improve the filtering efficiency and the continuous working ability of the equipment. At the same time, the setting of the scraper can also reduce the situation where the material adheres to the hemispherical surface, further ensuring the uniform distribution and processing effect of the material.

[0015] Preferably, the scraper is hollow inside, and the front side of the scraper is open along the rotation direction of the rotating shaft, so that when the scraper rotates, the material can enter the scraper from the front side of the scraper; At least part of the scraper member except the front side is provided with second filtering holes.

[0016] By adopting the above technical solution, the scraper can make the material and the particles and bubbles mixed in the material enter the scraper through the front opening during the rotation process. At the same time, the scraper is provided with a second filter hole in the rest of the part except the front side. When the scraper rotates, under the action of centrifugal force, the material inside the scraper can be discharged through the second filter hole, while the particles are retained inside the scraper, completing the collection of the particles. And when the material passes through the second filter hole, the bubbles in the material will be squeezed out, which helps to improve the quality of the final product.

[0017] Preferably, along the rotation direction of the rotating shaft, the front side of the scraping member is adjacent to the rear side of the rolling member.

[0018] By adopting the above technical solution, the design that the front side of the scraper is adjacent to the rear side of the rolling element allows the uncrushed particles to be immediately collected by the scraper after being rolled, thereby avoiding the accumulation of particles and preventing the particles from being repeatedly rolled.

[0019] Preferably, the particle processing assembly further comprises a stirring member, and both the stirring member and the rolling member are provided with material guide holes for the material to pass through.

[0020] By adopting the above technical solution, the particle processing component of the FPC connector injection molding equipment not only includes a rolling part, but also an additional stirring part, both of which are provided with material guide holes. This design helps to improve the quality of the product. Specifically: 1. The stirring piece can stir the material so that the material is heated evenly and the probability of incomplete melting of the material is reduced.

[0021] 2. The guide holes on the mixing and rolling parts can ensure the smooth passage of materials and avoid blockage, thereby improving production continuity.

[0022] 3. The material will be cut and mixed many times when passing through the guide hole, which helps to break the bubbles in the material and improve the quality of the final product.

[0023] Preferably, the surface of the stirring member and the inner side of the material guiding hole are both provided with spikes.

[0024] By adopting the above technical solution, the surface of the stirring piece and the inner side of the material guide hole are provided with spikes, which can effectively break the bubbles in the material and ensure the quality of the final injection molded product.

[0025] Preferably, the barrel comprises a first barrel and a second barrel which are interconnected, the first barrel and the second barrel are detachably connected, the feed drive assembly is connected to the first barrel, and the particle processing assembly is arranged on the second barrel.

[0026] By adopting the above technical solution, the barrel is divided into a first barrel and a second barrel, which are detachably connected. This design not only facilitates the assembly and maintenance of each component, but also improves the overall flexibility and maintenance convenience of the equipment. In particular, when a specific component needs to be replaced or cleaned, there is no need to disassemble the entire equipment, only the corresponding barrel needs to be separated, which greatly simplifies the operation process, reduces downtime, and improves production efficiency.

[0027] In a second aspect, the present application further provides an injection molding process for an FPC connector, using an injection molding device for an FPC connector as described in any one of the above, comprising the steps of: placing a plurality of conductive terminals into an injection mold and positioning them; The injection mold is closed and injection molding is performed by multi-point injection molding; After cooling, demoulding and connector acquisition are obtained.

[0028] By adopting the above technical solution, the present invention provides an injection molding process for FPC connectors, which uses efficient injection molding equipment for FPC connectors. Specifically: 1. Improve filtration efficiency: The filter element in the barrel fits tightly with the inner wall of the barrel, effectively filtering out particles in the material and ensuring the purity of the material entering the subsequent process.

[0029] 2. Enhanced cleaning ability: The design of the scraper can not only remove the residual particles attached to the hemispherical surface, but also collect and discharge these particles during the rotation process to avoid clogging and contamination.

[0030] 3. Easy to maintain and replace: The barrel is divided into a first barrel and a second barrel, which are detachably connected to facilitate cleaning and replacement of parts, thus extending the service life of the equipment.

[0031] 4. Multi-point injection molding method: Multi-point injection molding is used to ensure the uniform distribution of the injection material in the mold, reduce the generation of bubbles and defects, and improve the yield and product quality.

[0032] In summary, the present application includes at least one of the following beneficial technical effects: 1. The filter element fits tightly with the inner wall of the barrel, which can effectively filter the particles in the material, prevent the particles from entering the subsequent processes, and improve the quality and stability of the injection molded products; 2. The particle processing component drives the rolling element to roll the particles on the filter element through the driving unit, which can effectively break the particles and prevent the barrel from being blocked due to the accumulation of particles, thus ensuring the smooth operation of the equipment; 3. The design of the scraper can not only remove the residual materials attached to the hemispherical surface, but also collect and discharge these materials during the rotation process to avoid blockage and pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of the injection molding equipment for the FPC connector provided in this application.

[0034] Figure 2 It is a schematic structural diagram of the second barrel of the injection molding equipment for the FPC connector provided in the present application.

[0035] Figure 3 It is a schematic diagram of the particle processing component of the injection molding equipment for the FPC connector provided in this application.

[0036] Figure 4 It is a top view of the particle processing component of the injection molding equipment for the FPC connector provided in the present application.

[0037] Description of reference numerals: 1. barrel; 11. first barrel; 12. second barrel; 2. Hopper; 3. Feed drive assembly; 4. filter element; 41. first filter hole; 42. hemispherical surface; 5. Particle processing component; 51. Rolling part; 511. Rolling portion; 512. Rolling ribs; 52. Rotating shaft; 53. Scraping part; 531. Second filter hole; 54. Stirring part; 541. Spike; 55. Material guide hole. DETAILED DESCRIPTION

[0038] The following is combined with Figures 1 to 4 This application is further described in detail. Figure 4 The direction of the arrow in the figure is the rotation direction of the shaft.

[0039] like Figures 1 to 3 As shown, an embodiment of the present application discloses an injection molding device for an FPC connector, including a barrel 1, a hopper 2, a feed drive assembly 3, a filter element 4 and a particle processing assembly 5.

[0040] Specifically, the barrel 1 includes a first barrel 11 and a second barrel 12 which are interconnected, the first barrel 11 and the second barrel 12 are detachably connected, the feeding drive assembly 3 is connected to the first barrel 11, and the particle processing assembly 5 is disposed on the second barrel 12. By arranging the barrel 1 to include the first barrel 11 and the second barrel 12, the maintenance and replacement of various components of the injection molding equipment are more convenient.

[0041] The hopper 2 is communicated with the first barrel 11, so that the material enters the first barrel 11. A heating device such as a heating coil is provided on the outside of the barrel 1 to heat the material and turn it into a molten state.

[0042] The feeding drive assembly 3 includes a motor, a reducer and a screw. The screw is arranged in the first barrel 11 and is coaxially arranged with the first barrel 11. The screw is rotatably connected with the barrel 1 and its end away from the second barrel 12 passes through the barrel 1 and is connected to the motor through the reducer. The motor drives the screw to rotate to feed the material into the second barrel 12. A liquid injection nozzle is provided on the side of the second barrel 12 away from the first barrel 11. The material flowing through the second barrel 12 can be injected into the injection mold through the liquid injection nozzle to complete the shaping.

[0043] The filter element 4 is disposed inside the second barrel 12 and connected to the second barrel 12. The filter element 4 is closely attached to the inner wall of the barrel 1, and a first filter hole 41 is provided on the filter element 4. The first filter hole 41 allows the molten material to pass through. When the material passes through the first filter hole 41, the material will be squeezed, so that the bubbles in the material will burst. In addition, the particles in the material will be blocked by the first filter hole 41. The particles may refer to unmelted materials or other impurities.

[0044] The filter element 4 has a hemispherical surface 42, and the first filter holes 41 are arranged on the hemispherical surface. The surface area of ​​the hemispherical surface 42 is large, and more first filter holes 41 can be arranged, thereby improving the smoothness of material flow and the filtering effect on particulate matter.

[0045] The particle processing assembly 5 includes a driving unit and a rolling piece 51 . The rolling piece 51 is disposed in the barrel 1 . The driving unit is connected to the rolling piece 51 and is used to drive the rolling piece 51 to roll the particles on the filter element 4 .

[0046] For example, the driving unit includes a driving member (such as a motor), a rotating shaft 52 and a rolling member 51. The rolling member 51 is disposed in the barrel 1 and connected to the rotating shaft 52. The rotating shaft 52 is rotatably connected to the barrel 1. One end of the rotating shaft 52 passes through the barrel 1 and is connected to the driving member. The rolling member 51 has a rolling portion 511 for rolling particles. When the rotating shaft 52 rotates, the rolling portion 511 and the hemispherical surface 42 can jointly squeeze the particles, thereby accelerating the melting of the unmelted material.

[0047] The rolling part 511 is in an arc shape, and the distance between the rolling part 511 and the hemispherical surface 42 gradually increases along the rotation direction of the rotating shaft 52. An open structure is formed between the rolling part 511 and the hemispherical surface 42. When the rolling part 51 rotates, the material can easily enter the gap between the rolling part 511 and the hemispherical surface 42, and as the rolling part 51 continues to rotate, the rolling part 511 can fully roll the particles in the gap between the rolling part 511 and the hemispherical surface 42.

[0048] Furthermore, the rolling portion 511 is provided with rolling ribs 512 , and the rolling ribs 512 can improve the rolling effect as well as the structural strength and wear resistance of the rolling component 51 .

[0049] In addition, as 2 and Figure 4 As shown, the particle processing assembly 5 also includes a scraper 53, which is connected to the rotating shaft 52. When the rotating shaft 52 rotates, the scraper 53 can rotate to slidably fit with the hemispherical surface 42, thereby scraping away the materials and particles attached to the hemispherical surface 42 to avoid blocking the first filter hole 41.

[0050] Furthermore, the scraper 53 is hollow inside, and the front side of the scraper 53 is open along the rotation direction of the rotating shaft 52. When the scraper 53 rotates, the scraper 53 and the material move relative to each other so that the material and the particles can enter the scraper 53 from the front side. The scraper 53 is provided with a second filter hole 531 at least partially in the remaining parts except the front side. Under the action of the centrifugal force generated by the rotation of the scraper 53, the material inside the scraper 53 can be thrown out of the scraper 53 through the second filter hole 531, while the particles cannot pass through the second filter hole 531 and can only stick to the inner wall of the scraper 53 under the action of the centrifugal force. The collection of particles is completed. As for the cleaning of the particles, the first cylinder 11 and the second cylinder 12 can be separated and then cleaned.

[0051] Furthermore, along the rotation direction of the rotating shaft 52, the front side of the scraper 53 is adjacent to the rear side of the rolling member 51, so that after the particles are rolled, the particles that are not crushed can be immediately collected by the scraper 53. The reason is that if the particles are not crushed, the particles are likely not incompletely melted materials, but other impurities. By collecting the impurities, it is possible to avoid the impurities being repeatedly crushed, resulting in the impurities being crushed or the injection molding equipment being damaged. Even if the unmelted material particles are collected by the scraper 53, the scraper 53 can carry the material particles to rotate so that the material particles are fully heated and finally discharged from the second filter hole 531.

[0052] In addition, if Figures 2 to 3As shown, the particle processing assembly 5 also includes a stirring member 54, which can be a stirring plate. The stirring member 54 can stir the material so that the material is evenly heated. Both the stirring member 54 and the rolling member 51 are provided with a material guide hole 55 for the material to pass through. By providing the material guide hole 55, the material flow is facilitated, making the flow of the material smoother.

[0053] Furthermore, the surface of the stirring member 54 and the inner side of the material guide hole 55 are both provided with spikes 541. The spikes 541 can puncture bubbles in the material when in contact with the material, thereby reducing the probability of bubbles entering the injection mold along with the material.

[0054] In addition, an ultrasonic generator may be provided on the outside of the barrel 1. The high-frequency vibration of ultrasonic treatment can effectively break the agglomeration effect of the particles, making them easier to be crushed, and can also promote the discharge of gas in the material.

[0055] The embodiment of the present application also provides an injection molding process for an FPC connector, using the injection molding equipment for the FPC connector as described above, including the steps of: 1. placing a plurality of conductive terminals into an injection mold and positioning them; 2. closing the injection mold and performing injection molding by multi-point injection molding; 3. cooling and demolding to obtain a connector.

[0056] By placing the conductive terminals in the injection mold in advance, multiple conductive terminals are kept at appropriate intervals. Then the mold is closed and multi-point injection is adopted to ensure that each conductive terminal can be accurately embedded in the injection molded product, which improves the accuracy and consistency of the product. After cooling and demolding, the obtained connector has good electrical performance and mechanical strength to meet the needs of the electronics manufacturing industry.

Claims

1. An injection molding device for an FPC connector, characterized in that: It comprises a barrel (1), a material delivery drive assembly (3), a filter element (4) and a particle processing assembly (5); The material feeding drive assembly (3) is connected to the barrel (1); The filter element (4) is arranged inside the barrel (1) and connected to the barrel (1), the filter element (4) is tightly fitted to the inner wall of the barrel (1), and the filter element (4) is used to filter particulate matter in the material; The particle processing component (5) comprises a driving unit and a rolling piece (51), wherein the rolling piece (51) is arranged in the barrel (1), and the driving unit is connected to the rolling piece (51) and is used to drive the rolling piece (51) to roll the particles on the filter element (4).

2. The FPC connector injection molding device according to claim 1, characterized in that: The filter element (4) has a hemispherical surface (42), and a first filter hole (41) is provided on the hemispherical surface (42); The driving unit comprises a driving member, a rotating shaft (52) and a rolling member (51); the rolling member (51) is arranged in the barrel (1) and connected to the rotating shaft (52); the rotating shaft (52) is rotatably connected to the barrel (1); one end of the rotating shaft (52) passes through the barrel (1) and is connected to the driving member; The rolling element (51) has a rolling portion (511) for rolling the granular matter, the rolling portion (511) being in the shape of an arc surface, and along the rotation direction of the rotating shaft (52), the distance between the rolling portion (511) and the hemispherical surface (42) gradually increases.

3. The injection molding equipment for FPC connector according to claim 2, characterized in that: The rolling portion (511) is provided with rolling ribs (512).

4. The injection molding equipment for FPC connector according to claim 2, characterized in that: The particle processing assembly (5) further comprises a scraper (53), wherein the scraper (53) is connected to the rotating shaft (52), and the scraper (53) can be rotated to slidably fit with the hemispherical surface (42).

5. The injection molding equipment for FPC connector according to claim 4, characterized in that: The scraper (53) is hollow inside, and the front side of the scraper (53) is open along the rotation direction of the rotating shaft (52), so that when the scraper (53) rotates, the material can enter the scraper (53) from the front side. At least part of the scraper (53) except the front side is provided with a second filtering hole (531).

6. The injection molding equipment for FPC connector according to claim 5, characterized in that: Along the rotation direction of the rotating shaft (52), the front side of the scraper (53) is adjacent to the rear side of the rolling member (51).

7. The injection molding equipment for FPC connector according to claim 2, characterized in that: The particle processing assembly (5) further comprises a stirring member (54), and both the stirring member (54) and the rolling member (51) are provided with a material guide hole (55) for the material to pass through.

8. The injection molding equipment for FPC connector according to claim 7, characterized in that: Spikes (541) are provided on the surface of the stirring member (54) and the inner side of the material guiding hole (55).

9. The injection molding equipment for FPC connector according to claim 1, characterized in that: The barrel (1) comprises a first barrel (11) and a second barrel (12) which are interconnected, the first barrel (11) and the second barrel (12) being detachably connected, the feed drive assembly (3) being connected to the first barrel (11), and the particle processing assembly (5) being arranged on the second barrel (12).

10. An injection molding process for an FPC connector, characterized in that: The FPC connector injection molding device according to any one of claims 1 to 9 comprises the following steps: placing a plurality of conductive terminals into an injection mold and positioning them; The injection mold is closed and injection molding is performed by multi-point injection molding; After cooling, demoulding and connector acquisition are obtained.

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