Injection molding module for silica gel noise reduction ear caps and automatic production line

Abstract

The invention relates to the technical field of wearable intelligent equipment manufacturing, and particularly discloses an injection molding module for silica gel noise reduction ear caps and an automatic production line. The injection molding module for the silica gel noise reduction ear caps comprises a first cover mold, a second cover mold, a third cover mold and a movable bottom mold; the movable bottom die is sequentially and movably arranged in the first cover die, the second cover die and the third cover die, the first fixed die piece is provided with a first containing groove for containing the movable bottom die, the second fixed die piece is provided with a second containing groove for containing the movable bottom die, the third fixed die piece is provided with a third containing groove for containing the movable bottom die, and the movable bottom die is provided with a protruding column. The first movable mold piece is correspondingly provided with a first groove. The sound insulation and noise reduction effects are improved, the structural strength of the ear cap is guaranteed, and the attractiveness of the ear cap is prevented from being reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wearable smart device manufacturing, and in particular to an injection molding module and an automatic production line for silicone noise-reducing ear caps. Background Art

[0002] Headphones are a pair of transducers that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers placed close to the ears. Headphones can be detached from the media player and connected using a single plug, allowing users to listen to audio without disturbing others. With the rise in popularity of wearable smart devices, headphones are now commonly used with mobile phones, walkmans, radios, portable video games, and digital audio players.

[0003] In order to improve the comfort of earphones, the earphones are usually equipped with ear caps that are one-piece molded with silicone injection. The ear caps are made of soft silicone. One end of the ear caps is connected to the sound cavity of the earphones, and the other end of the ear caps is used to be inserted into the ears and fit the human body. While improving the comfort of earphones, the ear caps also help prevent them from falling off.

[0004] However, existing ear caps offer poor sound insulation and noise reduction performance, which can easily affect the headphone experience in noisy environments. To address this issue, researchers have attempted to inject a foaming agent into the silicone injection molding process to create pores in the ear caps, thereby improving their sound insulation and noise reduction. However, the resulting pores weaken the ear caps' structural strength, making them susceptible to damage and reducing their aesthetic appeal. This issue urgently needs to be addressed. Summary of the Invention

[0005] In order to improve the sound insulation and noise reduction effects while ensuring the structural strength of the ear caps and avoiding reducing the aesthetics of the ear caps, the present application provides an injection molding module and an automatic production line for silicone noise reduction ear caps.

[0006] This application provides an injection molding module and automatic production line for silicone noise-reducing ear caps, which adopt the following technical solutions: An injection molding module for a silicone noise-reducing ear cap, comprising: A first mold set, the first mold set includes a first fixed mold part and a first movable mold part that cooperate with each other, the first movable mold part is provided with a first glue injection hole, and the first movable mold part moves in a direction close to or away from the first fixed mold part to achieve mold closing and mold opening; A second mold set, the second mold set includes a second fixed mold part and a second movable mold part that cooperate with each other, the second movable mold part is provided with a second glue injection hole, and the second movable mold part moves in a direction close to or away from the second fixed mold part to achieve mold closing and mold opening; A third mold set includes a third fixed mold member and a third movable mold member, the third movable mold member is provided with a third glue injection hole, and the third movable mold member moves towards or away from the third fixed mold member to realize mold closing and mold opening; A movable bottom mold is sequentially arranged in the first mold set, the second mold set and the third mold set, the first fixed mold member is provided with a first accommodating groove for accommodating the movable bottom mold, the second fixed mold member is provided with a second accommodating groove for accommodating the movable bottom mold, and the third fixed mold member is provided with a third accommodating groove for accommodating the movable bottom mold, the movable bottom mold is provided with a convex column, the first movable mold member is provided with a first groove, when the movable bottom mold is accommodated in the first accommodating groove and the first movable mold member is closed with the first fixed mold member, the side wall of the convex column and the groove wall of the first groove form a first forming cavity for forming the connecting part of the ear cap and the earphone sound cavity, and the first glue injection hole is communicated with the first forming cavity; the second movable mold member is provided with a second groove, when the movable bottom mold is accommodated in the second accommodating groove and the second movable mold member is closed with the second fixed mold member, the side wall of the convex column and the groove wall of the second groove form a second forming cavity for forming the middle part of the ear cap, and the second glue injection hole is communicated with the second forming cavity; the third movable mold member is provided with a third groove, when the movable bottom mold is accommodated in the third accommodating groove and the third movable mold member is closed with the third fixed mold member, the side wall of the convex column and the groove wall of the third groove form a third forming cavity for forming the ear cap ear contact part, and the third glue injection hole is communicated with the third forming cavity.

[0007] By adopting the above technical solution, in the process of manufacturing the silicone noise reduction ear cap, the movable bottom mold is first placed in the first accommodating groove opened by the first fixed mold piece, and then the first movable mold piece is moved toward the direction close to the first fixed mold piece to realize mold closing. At this time, the side wall of the convex column and the groove wall of the first groove are surrounded to form a first molding cavity, and the first injection hole is connected to the first molding cavity. The molten silicone enters the first molding cavity through the first injection hole and is cooled and solidified to form the connection part between the ear cap and the earphone sound cavity. Then the first movable mold piece is moved toward the direction away from the first fixed mold piece to realize mold separation. At this time, the connection part between the ear cap and the earphone sound cavity is connected On the movable bottom mold, the movable bottom mold is then transferred to the second accommodating groove opened by the second fixed mold piece, and the second movable mold piece moves toward the direction close to the second fixed mold piece to realize mold closing. At this time, the side wall of the convex column and the groove wall of the second groove are surrounded to form a second molding cavity, and the second glue injection hole is connected to the second molding cavity. The silica gel with the foaming agent enters the second molding cavity through the second glue injection hole and is cooled and solidified to form the middle part of the ear cap. The middle part of the ear cap is formed on the basis of the connection part between the ear cap and the sound cavity of the earphone. Then the second movable mold piece moves toward the direction away from the second fixed mold piece to realize mold separation. At this time, the middle part of the ear cap connected to the earphone sound cavity is The connecting part of the machine sound cavity and the middle part of the ear cap are connected to the movable bottom mold, and then the movable bottom mold is transferred to the third accommodating groove opened by the third fixed mold part, and the third movable mold part moves toward the third fixed mold part to realize mold closing. At this time, the side wall of the convex column and the groove wall of the third groove are surrounded to form a third molding cavity, and the third glue injection hole is connected to the third molding cavity. The molten silicone enters the third molding cavity through the third glue injection hole and is cooled and solidified to form the ear-fitting part of the ear cap. The ear-fitting part of the ear cap is formed on the basis of the connecting part of the ear cap with the earphone sound cavity and the middle part of the ear cap, thereby forming a complete The ear cap, the connection part of the ear cap with the earphone sound cavity and the ear-sticking part of the ear cap are formed by silicone injection molding, the middle part of the ear cap is formed by silicone injection molding with the addition of a foaming agent, and the connection part of the ear cap with the earphone sound cavity and the ear-sticking part of the ear cap are located at both ends of the middle part of the ear cap to play a supporting role, which is beneficial to improve the structural strength. While improving the sound insulation and noise reduction effect, it is beneficial to ensure the structural strength of the ear cap. At the same time, the ear-sticking part of the ear cap is usually folded outward to wrap the middle part of the ear cap. The fine holes formed in the middle part of the ear cap due to the addition of the foaming agent are covered by the ear-sticking part of the ear cap, thereby avoiding reducing the aesthetics of the ear cap.

[0008] Preferably, a first ring cylinder is provided at the bottom of the first groove around the outlet position of the first glue injection hole, the first ring cylinder is coaxially connected to the first glue injection hole, and an abutment block is provided at the bottom of the first ring cylinder. When the first movable mold and the first fixed mold are closed, the abutment block abuts against the top of the convex column, and the gap between the bottom of the first ring cylinder and the top of the convex column forms a channel for connecting the first glue injection hole with the first molding cavity.

[0009] By adopting the above technical solution, the outer wall of the first ring tube, the inner wall of the first groove and the top of the boss are arranged to form a first molding cavity for molding the annular ear cap connection part. When the first movable mold and the first fixed mold are closed, the abutment block abuts against the top of the boss, so that a gap is formed between the bottom of the first ring tube and the top of the boss for connecting the first glue injection hole and the first molding cavity. The silicone enters the first molding cavity through this gap for the molding process. This setting makes the glue injection port of the connection part of the ear cap with the earphone sound cavity located at the inner hole and hidden, which is beneficial to improve the molding quality of the ear cap.

[0010] Preferably, a second ring cylinder is provided at the bottom of the second groove around the outlet position of the second glue injection hole, the second ring cylinder is coaxially connected to the second glue injection hole, a notch is provided at the bottom of the second ring cylinder, the position of the notch in the second ring cylinder corresponds to the position of the abutment block in the first ring cylinder, and when the second movable mold and the second fixed mold are closed, the bottom of the second ring cylinder and the top of the first molding cavity are located on the same horizontal plane.

[0011] By adopting the above technical solution, since the connection part between the ear cap and the earphone sound cavity has been formed on the movable bottom mold in the first set of molds, when the movable bottom mold is transferred to the second set of molds and the second movable mold and the second fixed mold are closed, the top of the connection part between the ear cap and the earphone sound cavity, the inner wall of the second groove and the outer wall of the second ring tube are surrounded to form a second molding cavity for molding the middle part of the annular ear cap. The notch of the second ring tube corresponds to the position of the abutment block in the first ring tube, so that the silicone with the foaming agent added enters the second molding cavity through the notch for molding. This setting makes the glue injection port in the middle part of the ear cap located at the inner hole for hiding, and this notch fills the missing position of the abutment block in the first molding process, which is beneficial to improving the molding quality of the ear cap.

[0012] Preferably, a first positioning column is vertically fixedly provided in the first accommodating groove, and a positioning hole for the first positioning column to movably penetrate is correspondingly opened in the movable bottom mold.

[0013] By adopting the above technical solution, when the movable bottom mold is placed in the first receiving groove, the movable bottom mold is inserted into the first positioning column through the positioning hole, and the movable bottom mold is difficult to shake in the first receiving groove, which is beneficial to improving the stability of the movable bottom mold placed in the first receiving groove, thereby helping to improve the molding quality in the first set of molds.

[0014] Preferably, the movable bottom mold is vertically fixed with a limiting column, and the first movable mold is correspondingly provided with a first limiting hole for the limiting column to penetrate.

[0015] By adopting the above technical solution, after the movable bottom mold is positioned in the first groove through the cooperation of the positioning column and the positioning hole, during the process of closing the first movable mold and the first fixed mold, the limiting column on the movable bottom mold penetrates into the first limiting hole on the first movable mold, which is beneficial to further improve the stability of the movable bottom mold during the molding process, thereby helping to further improve the molding quality in the first set of molds.

[0016] Preferably, the limiting column is arranged in a truncated cone shape.

[0017] By adopting the above technical solution, this arrangement is conducive to improving the accuracy of the mold closing between the first movable mold part and the first fixed mold part.

[0018] Preferably, the first fixed mold part is vertically fixed with a first guide column, and the first movable mold part is correspondingly provided with a first guide hole for the first guide column to penetrate.

[0019] By adopting the above technical solution, during the process of closing the first movable mold and the first fixed mold, the first guide column penetrates into the first guide hole, which is beneficial to improving the stability of the first movable mold and the first fixed mold during closing the mold.

[0020] Preferably, the first accommodating groove, the second accommodating groove and the third accommodating groove are all arranged as through grooves, and the length of the movable bottom mold is greater than the lengths of the first fixed mold, the second fixed mold and the third fixed mold. When the movable bottom mold is accommodated in the first accommodating groove, the two ends of the movable bottom mold in the length direction are respectively passed through the two ends of the first accommodating groove. When the movable bottom mold is accommodated in the second accommodating groove, the two ends of the movable bottom mold in the length direction are respectively passed through the two ends of the second accommodating groove. When the movable bottom mold is accommodated in the third accommodating groove, the two ends of the movable bottom mold in the length direction are respectively passed through the two ends of the third accommodating groove.

[0021] By adopting the above technical solution, this arrangement facilitates the removal of the movable bottom mold from the first accommodating groove, the second accommodating groove or the third accommodating groove, thereby facilitating the transfer operation of the movable bottom mold in the first fixed mold part, the second fixed mold part and the third fixed mold part.

[0022] Preferably, handle grooves are symmetrically provided at both ends of the movable bottom mold.

[0023] By adopting the above technical solution, the movable bottom mold is taken out from the first fixed mold part, the second fixed mold part or the third fixed mold part by touching the handle groove for taking and placing operations, which helps to avoid touching the surface of the movable bottom mold where the protrusions are provided, thereby avoiding the reduction of molding quality due to impurities on the movable bottom mold.

[0024] An automatic production line for silicone noise-reducing ear caps, comprising the above-mentioned injection molding module, and also comprising a first injection molding machine, a second injection molding machine, a third injection molding machine, a first manipulator, a second manipulator, a third manipulator, a fourth manipulator, a material taking platform and a conveyor line, wherein the first set of molds is installed on the first injection molding machine, the second set of molds is installed on the second injection molding machine, and the third set of molds is installed on the third injection molding machine. The first injection molding machine, the second injection molding machine and the third injection molding machine are arranged side by side in sequence, the first manipulator is arranged between the first injection molding machine and the second injection molding machine for transferring the movable bottom mold from the first fixed mold part to the second fixed mold part, and the second manipulator is arranged between the second injection molding machine and the third injection molding machine. The position is used to transfer the movable bottom mold from the second fixed mold to the third fixed mold, the conveyor line is located on one side of the first injection molding machine, the second injection molding machine and the third injection molding machine and is arranged along the transfer direction of the movable bottom mold, the conveying direction of the conveyor line is opposite to the transfer direction of the movable bottom mold in the first injection molding machine, the second injection molding machine and the third injection molding machine, the material picking platform is close to the head end of the conveyor line, the third manipulator is located between the third injection molding machine and the material picking platform and is used to transfer the movable bottom mold from the third fixed mold to the material picking platform, and the fourth manipulator is close to the end of the conveyor line and is used to transfer the movable bottom mold after picking up the material from the conveyor line to the first injection molding machine.

[0025] By adopting the above technical solution, the first set of molds is installed on the first injection molding machine, the second set of molds is installed on the second injection molding machine, and the third set of molds is installed on the third injection molding machine. When silicone noise-reducing ear caps need to be made, the fourth robot transfers the empty movable bottom mold at the end of the conveyor line to the first set of molds of the first injection molding machine to complete the molding of the connection part between the ear cap and the earphone sound cavity. After the connection part between the ear cap and the earphone sound cavity is formed, the first movable mold and the first fixed mold are opened, and the first robot transfers the movable bottom mold from the first set of molds to the second set of molds, and completes the molding of the middle part of the ear cap based on the connection part between the ear cap and the earphone sound cavity. After molding, the connection part between the ear cap and the earphone sound cavity is connected to the middle part of the ear cap, and then the second movable mold and The second fixed mold is opened, and the second manipulator transfers the movable bottom mold from the second set of molds to the third set of molds, and completes the molding of the ear cap's ear-fitting part based on the connection part between the ear cap and the earphone sound cavity and the middle part of the ear cap, thereby completing the entire molding process of the noise-reducing ear cap. Then the third movable mold and the third fixed mold are opened, and the third manipulator transfers the movable bottom mold from the third set of molds to the material-retrieving platform. The staff takes out the noise-reducing ear cap molded on the movable bottom mold and places the empty movable bottom mold on the conveyor line for transportation, so that the fourth manipulator transfers the empty movable bottom mold to the first injection molding machine for another molding operation. This cycle is repeated to realize the recycling of the movable bottom mold, with a high degree of automation, which is conducive to improving the production efficiency of the noise-reducing ear cap.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting a first set of molds, a second set of molds, a third set of molds and a movable bottom mold, and the movable bottom mold is moved and set in the first set of molds, the second set of molds and the third set of molds at one time, the connection part between the ear cap and the earphone sound cavity is formed in the first set of molds, and then the middle part of the ear cap is formed on the basis of the connection part between the ear cap and the earphone sound cavity in the second set of molds, and then the ear-fitting part of the ear cap is formed on the basis of the connection part between the ear cap and the earphone sound cavity and the middle part of the ear cap in the third set of molds, the connection part between the ear cap and the earphone sound cavity and the ear cap are formed. The ear-touching part of the cap is injection-molded with silicone, and the middle part of the ear cap is injection-molded with silicone to which a foaming agent is added. The connection part of the ear cap with the sound cavity of the earphone and the ear-touching part of the ear cap are located at both ends of the middle part of the ear cap to play a supporting role, which is beneficial to improving the structural strength. While improving the sound insulation and noise reduction effect, it is beneficial to ensure the structural strength of the ear cap. At the same time, the ear-touching part of the ear cap is usually folded outward to wrap the middle part of the ear cap. The fine holes in the middle part of the ear cap due to the addition of the foaming agent are covered by the ear-touching part of the ear cap, thereby avoiding reducing the aesthetics of the ear cap.

[0027] 2. By setting a first ring tube and setting an abutment block at the bottom of the first ring tube, the outer wall of the first ring tube, the inner wall of the first groove and the top of the convex column are surrounded to form a first molding cavity for molding the annular ear cap connection part. When the first movable mold and the first fixed mold are closed, the abutment block abuts against the top of the convex column, so that a gap is formed between the bottom of the first ring tube and the top of the convex column for connecting the first glue injection hole and the first molding cavity. The silicone enters the first molding cavity through this gap for the molding process. This setting makes the glue injection port of the connection part of the ear cap with the earphone sound cavity located at the inner hole and hidden, which is beneficial to improve the molding quality of the ear cap.

[0028] 3. By setting a second ring tube and opening a notch at the bottom of the second ring tube, since the connection part between the ear cap and the earphone sound cavity has been formed on the movable bottom mold in the first mold set, when the movable bottom mold is transferred to the second mold set and the second movable mold and the second fixed mold are closed, the top of the connection part between the ear cap and the earphone sound cavity, the inner wall of the second groove and the outer wall of the second ring tube are surrounded to form a second molding cavity for molding the middle part of the annular ear cap. The notch of the second ring tube corresponds to the position of the abutment block in the first ring tube, so that the silicone with foaming agent added enters the second molding cavity through the notch for molding. This setting makes the glue injection port in the middle part of the ear cap located at the inner hole for hiding, and this notch fills the missing position of the abutment block in the first molding process, which is beneficial to improve the molding quality of the ear cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the injection molding module for the silicone noise reduction ear cap in the embodiment of the present application.

[0030] Figure 2 This is a structural diagram of the movable bottom mold placed in the first set of molds in an embodiment of the present application.

[0031] Figure 3 This is a structural schematic diagram from another perspective of the movable bottom mold placed in the first set of molds in an embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram of the connection portion between the ear cap formed in the embodiment of the present application and the earphone acoustic cavity and connected to the movable bottom mold.

[0033] Figure 5 It is a vertical cross-sectional view of the first set of molds when the mold is opened in the embodiment of the present application.

[0034] Figure 6 yes Figure 5 Enlarged view of part A in the middle.

[0035] Figure 7 It is a vertical cross-sectional view of the first set of molds when the mold is closed in the embodiment of the present application.

[0036] Figure 8 yes Figure 7 Enlarged view of part B in the middle.

[0037] Figure 9 This is a structural diagram of the movable bottom mold placed in the second set of molds in an embodiment of the present application.

[0038] Figure 10 This is a schematic structural diagram from another perspective of the movable bottom mold being placed in the second set of molds in an embodiment of the present application.

[0039] Figure 11 It is a structural schematic diagram of the connection portion of the ear cap formed in an embodiment of the present application with the earphone acoustic cavity and the middle portion of the ear cap connected to the movable bottom mold.

[0040] Figure 12 It is a vertical cross-sectional view of the second set of molds when opening the mold in the embodiment of the present application.

[0041] Figure 13 yes Figure 12 Enlarged view of part C in the middle.

[0042] Figure 14 It is a vertical cross-sectional view of the second set of molds when the mold is closed in the embodiment of the present application.

[0043] Figure 15 yes Figure 14 Enlarged view of part D in the middle.

[0044] Figure 16 This is a structural diagram of the movable bottom mold placed in the third set of molds in an embodiment of the present application.

[0045] Figure 17 This is a schematic structural diagram from another perspective of the embodiment of the present application in which the movable bottom mold is placed in the third set of molds.

[0046] Figure 18 It is a structural schematic diagram of the ear cap formed in an embodiment of the present application, in which the connection portion with the earphone acoustic cavity, the middle portion of the ear cap, and the ear-contact portion of the ear cap are completely connected to the movable bottom mold.

[0047] Figure 19 This is a simplified structural diagram of an automatic production line for silicone noise-reducing ear caps in an embodiment of the present application.

[0048] Description of reference numerals: 1. First mold sleeve; 11. First fixed mold member; 12. First movable mold member; 2. First glue injection hole; 3. Second mold sleeve; 31. Second fixed mold member; 32. Second movable mold member; 4. Second glue injection hole; 5. Third mold sleeve; 51. Third fixed mold member; 52. Third movable mold member; 6. Third glue injection hole; 7. Movable bottom mold; 8. First accommodating groove; 9. Second accommodating groove; 10. Third accommodating groove; 13. Boss; 14. First groove; 15. Second groove; 16. Third groove; 17. First ring; 18. Abutment block; 19. Second ring; 20. Notch; 21. First positioning post ; 22. Positioning hole; 23. Limiting column; 24. First limiting hole; 25. First guide column; 26. First guide hole; 27. Handle groove; 28. First injection molding machine; 29. ​​Second injection molding machine; 30. Third injection molding machine; 33. First manipulator; 34. Second manipulator; 35. Third manipulator; 36. Fourth manipulator; 37. Material taking platform; 38. Conveyor line; 39. Second positioning column; 40. Second limiting hole; 41. Second guide column; 42. Second guide hole; 43. Third positioning column; 44. Third limiting hole; 45. Third guide column; 46. Third guide hole. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-19 This application is described in further detail.

[0050] The present application embodiment discloses an injection molding module for a silicone noise reduction ear cap, referring to Figure 1 , including a first set of molds 1, a second set of molds 3, a third set of molds 5 and a movable bottom mold 7. The movable bottom mold 7 is sequentially moved and set in the first set of molds 1, the second set of molds 3 and the third set of molds 5 to form a first molding cavity, a second molding cavity and a third molding cavity respectively. First, the connection part between the ear cap and the earphone sound cavity is molded in the first molding cavity, and then the middle part of the ear cap is molded in the second molding cavity on the basis of the connection part between the ear cap and the earphone sound cavity. Finally, the ear-fitting part of the ear cap is molded in the third molding cavity on the basis of the connection part between the ear cap and the earphone sound cavity and the middle part of the ear cap, thereby completing the entire injection molding process of the ear cap. It should be noted that the connecting part between the ear cap and the earphone sound cavity mainly plays a connecting role, and the ear-sticking part of the ear cap is mainly attached to the skin and mainly plays a role in improving comfort. The connecting part of the ear cap with the earphone sound cavity and the ear-sticking part of the ear cap are molded by silicone injection molding, and the middle part of the ear cap is injection molded by silicone with the addition of foaming agent. The connecting part of the ear cap with the earphone sound cavity and the ear-sticking part of the ear cap are located at both ends of the middle part of the ear cap and play a supporting role, which is beneficial to improve the structural strength. While improving the sound insulation and noise reduction effect, it is beneficial to ensure the structural strength of the ear cap. At the same time, the ear-sticking part of the ear cap is usually folded outward to wrap the middle part of the ear cap. The pores in the middle part of the ear cap due to the addition of the foaming agent are covered by the ear-sticking part of the ear cap, thereby avoiding reducing the aesthetics of the ear cap.

[0051] Reference Figure 1 and Figure 2 The first mold set 1 includes a first fixed mold part 11 and a first movable mold part 12 that cooperate with each other. The first movable mold part 12 is provided with a first glue injection hole 2. The first movable mold part 12 moves toward or away from the first fixed mold part 11 to realize mold closing and mold opening. The first movable mold part 12 and the first fixed mold part 11 are opened to facilitate the removal and placement operation of the movable bottom mold 7 in the first mold set 1. When the movable bottom mold 7 moves into the first mold set 1, the first movable mold part 12 and the first fixed mold part 11 are closed to form the connection part between the ear cap and the earphone sound cavity.

[0052] Reference Figure 2 and Figure 3 The first fixed mold 11 has a surface facing the first movable mold 12 and is provided with a first accommodating groove 8 for accommodating the movable bottom mold 7. Specifically, the first accommodating groove 8 is arranged as a through groove, that is, both ends of the first accommodating groove 8 are connected to the side walls of the first fixed mold 11. At the same time, the length of the movable bottom mold 7 is greater than the length of the first fixed mold 11. When the movable bottom mold 7 is accommodated in the first accommodating groove 8, the two opposite side walls of the movable bottom mold 7 respectively abut against the two opposite groove walls of the first accommodating groove 8, and the two ends of the movable bottom mold 7 in the length direction are respectively passed through the two connected ends of the first accommodating groove 8 to facilitate the transfer operation of the movable bottom mold 7.

[0053] Reference Figure 2 and Figure 3 , a boss 13 is fixedly provided in the middle position of the movable bottom mold 7, and a first groove 14 is correspondingly provided on the first movable mold part 12. When the movable bottom mold 7 is accommodated in the first accommodating groove 8 and the first movable mold part 12 is molded with the first fixed mold part 11, the side wall of the boss 13 and the groove wall of the first groove 14 are combined to form a first molding cavity for molding the connection part between the ear cap and the earphone sound cavity, and the first glue injection hole 2 is connected to the first molding cavity. During the molding process of the connection part between the ear cap and the earphone sound cavity, the movable bottom mold 7 is first placed in the first accommodating groove 8. At this time, the position of the boss 13 corresponds to the position of the first groove 14. Then the first movable mold part 12 is moved in the direction close to the first fixed mold part 11 to make the first movable mold part 12 and the first fixed mold part 11 be molded together. At this time, the side wall of the boss 13 and the groove wall of the first groove 14 are combined to form the first molding cavity. The molten silicone is injected into the first molding cavity through the first glue injection hole 2 for cooling and solidification molding. Then refer to Figure 4 The first fixed mold 11 and the first movable mold 12 are opened. At this time, the connection part between the molded ear cap and the earphone sound cavity is connected to the movable bottom mold 7.

[0054] Reference Figure 5-Figure 8, the bottom of the first ring cylinder 17 is provided with an abutting block 18, when the first movable die part 12 and the first fixed die part 11 are closed, the abutting block 18 abuts on the top of the convex column 13, at this time, the gap between the bottom of the first ring cylinder 17 and the top of the convex column 13 forms a channel for the first glue injection hole 2 to communicate with the first forming cavity, the molten silica gel flows into the first forming cavity through the channel, it is worth mentioning that this setting makes the glue injection hole position of the connecting part between the ear cap and the sound cavity of the earphone hidden at the inner hole, thereby facilitating to improve the forming quality of the ear cap.

[0055] With reference to Figure 2 , Figure 3 and Figure 4 , the bottom of the first accommodating groove 8 is vertically fixedly provided with a first positioning column 21, the movable bottom die 7 is correspondingly provided with a positioning hole 22 for the first positioning column 21 to movably penetrate, in the process of placing the movable bottom die 7 in the first accommodating groove 8, the movable bottom die 7 is sleeved on the first positioning column 21 through the positioning hole 22, so as to improve the stability of the movable bottom die 7 placed in the first accommodating groove 8. In the embodiment, the first positioning column 21 and the positioning hole 22 are correspondingly provided with two groups, and the two positioning holes 22 are symmetrically arranged on the opposite sides of the convex column 13.

[0056] With reference to Figure 2 , Figure 3 and Figure 4 , the movable bottom die 7 is vertically fixedly provided with a limiting column 23, the first movable die part 12 is correspondingly provided with a first limiting hole 24 for the limiting column 23 to penetrate, meanwhile, the first fixed die part 11 is vertically fixedly provided with a first guide column 25, and the first movable die part 12 is correspondingly provided with a first guide hole 26 for the first guide column 25 to penetrate. In the embodiment, the limiting column 23 is in the shape of a circular truncated cone, so as to improve the accuracy and stability of the closing of the first movable die part 12 and the first fixed die part 11. The number of the first guide column 25 is four, and the four first guide columns 25 are arranged at the four end corners of the surface of the first fixed die part 11 facing the first movable die part 12.

[0057] With reference to Figure 2 and Figure 4 , when the connecting part between the ear cap and the sound cavity of the earphone is formed in the first sleeve die 1, the first movable die part 12 moves away from the first fixed die part 11 to open the die, at this time, the connecting part between the ear cap and the sound cavity of the earphone is connected on the movable bottom die 7, and the movable bottom die 7 is transferred to the second sleeve die 3 to form the middle part of the ear cap on the basis of the connecting part between the ear cap and the sound cavity of the earphone. In order to avoid the movable bottom die 7 touching the surface of the movable bottom die 7 during the transfer process, handle grooves 27 are symmetrically arranged at the two ends of the movable bottom die 7.

[0058] Reference Figure 9 and Figure 10 The second set mold 3 includes a second fixed mold part 31 and a second movable mold part 32 that cooperate with each other. The second movable mold part 32 is provided with a second glue injection hole 4. The second movable mold part 32 moves toward or away from the second fixed mold part 31 to realize mold closing and mold opening. The second movable mold part 32 and the second fixed mold part 31 are opened to facilitate the removal and placement operation of the movable bottom mold 7 in the second set mold 3. When the movable bottom mold 7 moves into the second set mold 3, the second movable mold part 32 and the second fixed mold part 31 are closed to form the middle part of the ear cap.

[0059] Reference Figure 9 and Figure 10 The second fixed mold 31 has a surface facing the second movable mold 32 and is provided with a second accommodating groove 9 for accommodating the movable bottom mold 7. Specifically, the second accommodating groove 9 is also arranged as a through groove, that is, both ends of the second accommodating groove 9 are connected to the side walls of the second fixed mold 31. At the same time, the length of the movable bottom mold 7 is greater than the length of the second fixed mold 31. When the movable bottom mold 7 is accommodated in the second accommodating groove 9, the two opposite side walls of the movable bottom mold 7 respectively abut against the two opposite groove walls of the second accommodating groove 9, and the two ends of the movable bottom mold 7 in the length direction are respectively passed through the two connected ends of the second accommodating groove 9 to facilitate the transfer operation of the movable bottom mold 7.

[0060] Reference Figure 9 and Figure 10 , the second movable mold 32 is provided with a second groove 15 at a position corresponding to the position where the boss 13 is provided on the movable bottom mold 7. When the movable bottom mold 7 is accommodated in the second accommodating groove 9 and the second movable mold 32 is molded with the second fixed mold 31, the side wall of the boss 13 and the groove wall of the second groove 15 are combined to form a second molding cavity for molding the middle part of the ear cap, and the second glue injection hole 4 is connected to the second molding cavity. During the molding process of the middle part of the ear cap, the movable bottom mold 7 is first placed in the second accommodating groove 9. At this time, the position of the boss 13 corresponds to the position of the second groove 15. Then the second movable mold 32 is moved toward the direction close to the second fixed mold 31 to close the second movable mold 32 and the second fixed mold 31. At this time, the side wall of the boss 13 and the groove wall of the second groove 15 are combined to form a second molding cavity. The molten silicone with foaming agent added is injected into the second molding cavity through the second glue injection hole 4 for cooling and solidification molding. Then refer to Figure 11 The second fixed mold 31 and the second movable mold 32 are opened. At this point, the connection between the ear cap and the earphone acoustic cavity and the middle part of the ear cap are both connected to the movable bottom mold 7. It should be noted that the addition of a foaming agent to the silicone rubber creates pores in the middle part of the molded ear cap, thereby creating multiple sound insulation cavities in the middle part of the ear cap, thereby achieving the sound insulation and noise reduction effect of the silicone rubber foam.

[0061] Reference Figure 12-15The bottom of the second groove 15 is surrounded by a second ring 19 at the outlet of the second glue injection hole 4. The second ring 19 is coaxially connected to the second glue injection hole 4 and is coaxially arranged with the second groove 15. At the same time, a notch 20 is opened at the bottom of the second ring 19. When the second movable mold 32 and the second fixed mold 31 are closed, the bottom of the second ring 19 is located on the same horizontal plane as the top of the first molding cavity. The notch 20 is a channel for connecting the second glue injection hole 4 with the second molding cavity. The silicone with added foaming agent flows into the second molding cavity through this channel. The glue injection port in the middle of the ear cap is located in the inner hole and is hidden, which is conducive to improving the molding quality of the ear cap. It is worth mentioning that the position of the notch 20 in the second ring 19 corresponds to the position of the abutment block 18 in the first ring 17. The notch 20 fills the missing position of the abutment block 18 during the first molding process, which is conducive to improving the molding integrity of the ear cap.

[0062] Reference Figure 12-15 Second positioning posts 39 are vertically fixed to the bottom of the second receiving groove 9. The movable bottom mold 7 is inserted onto the second positioning posts 39 through the positioning holes 22. During placement of the movable bottom mold 7 in the second receiving groove 9, the movable bottom mold 7 is inserted onto the second positioning posts 39 through the positioning holes 22, thereby improving the stability of the movable bottom mold 7 in the second receiving groove 9. In this embodiment, two sets of second positioning posts 39 are provided corresponding to the positioning holes 22. The two second positioning posts 39 are symmetrically arranged on opposite sides of the boss 13.

[0063] Reference Figure 9 、 Figure 10 and Figure 11 The second movable mold 32 has a second limiting hole 40 at the position corresponding to the limiting post 23, for the limiting post 23 to pass through. Furthermore, a second guide post 41 is vertically fixed to the second fixed mold 31, and a second guide hole 42 is correspondingly formed in the second movable mold 32 for the second guide post 41 to pass through. In this embodiment, the number of second guide posts 41 is also set to four, and the four second guide posts 41 are respectively located at the four end corners of the surface of the second fixed mold 31 facing the second movable mold 32.

[0064] Reference Figure 9 、 Figure 10 and Figure 11 When the middle part of the ear cap is formed in the second set of molds 3, the second movable mold 32 moves away from the second fixed mold 31 to open the mold. At this time, the middle part of the ear cap is connected to the connection part between the ear cap and the earphone sound cavity, and the middle part of the ear cap and the connection part between the ear cap and the earphone sound cavity are both connected to the movable bottom mold 7. The movable bottom mold 7 is transferred to the third set of molds 5 to form the ear cap's ear-fitting part based on the connection part between the ear cap and the earphone sound cavity and the middle part of the ear cap.

[0065] Reference Figure 16 and Figure 17 The third set of molds 5 includes a third fixed mold part 51 and a third movable mold part 52 that cooperate with each other. The third movable mold part 52 is provided with a third glue injection hole 6. The third movable mold part 52 moves toward or away from the third fixed mold part 51 to realize mold closing and mold opening. The third movable mold part 52 and the third fixed mold part 51 are opened to facilitate the removal and placement operation of the movable bottom mold 7 in the third set of molds 5. When the movable bottom mold 7 moves into the third set of molds 5, the third movable mold part 52 and the third fixed mold part 51 are closed to form the ear-fitting part of the ear cap.

[0066] Reference Figure 16 and Figure 17 A third accommodating groove 10 for accommodating the movable bottom mold 7 is provided on the surface of the third fixed mold 51 facing the third movable mold 52. Specifically, the third accommodating groove 10 is also arranged as a through groove, that is, both ends of the third accommodating groove 10 are connected to the side walls of the third fixed mold 51. At the same time, the length of the movable bottom mold 7 is greater than the length of the third fixed mold 51. When the movable bottom mold 7 is accommodated in the third accommodating groove 10, the two opposite side walls of the movable bottom mold 7 respectively abut against the two opposite groove walls of the third accommodating groove 10, and the two ends of the movable bottom mold 7 in the length direction are respectively passed through the two connected ends of the third accommodating groove 10 to facilitate the transfer operation of the movable bottom mold 7.

[0067] Reference Figure 16 and Figure 17 , the third movable mold 52 is provided with a third groove 16 at a position corresponding to the position where the boss 13 is provided on the movable bottom mold 7. When the movable bottom mold 7 is accommodated in the third accommodating groove 10 and the third movable mold 52 is molded with the third fixed mold 51, the side wall of the boss 13 and the groove wall of the third groove 16 are combined to form a third molding cavity for molding the ear cap's ear-fitting part, and the third glue injection hole 6 is connected to the third molding cavity. During the molding process of the ear cap's ear-fitting part, the movable bottom mold 7 is first placed in the third accommodating groove 10. At this time, the position of the boss 13 corresponds to the position of the third groove 16. Then the third movable mold 52 is moved toward the direction close to the third fixed mold 51 to close the third movable mold 52 and the third fixed mold 51. At this time, the side wall of the boss 13 and the groove wall of the third groove 16 are combined to form a third molding cavity. The molten silicone is injected into the third molding cavity through the third glue injection hole 6 for cooling and solidification molding. Then refer to Figure 18 The third fixed mold 51 and the third movable mold 52 are opened. At this time, the connection part of the molded ear cap with the earphone sound cavity, the middle part of the ear cap and the ear-contact part of the ear cap are completely connected to the movable bottom mold 7.

[0068] Reference Figure 16 、 Figure 17 and Figure 18Similarly, third positioning posts 43 are vertically fixed to the bottom of the third receiving groove 10. The movable bottom mold 7 is inserted onto the third positioning posts 43 via the positioning holes 22. During placement of the movable bottom mold 7 in the third receiving groove 10, the movable bottom mold 7 is inserted onto the third positioning posts 43 via the positioning holes 22, thereby improving the stability of the movable bottom mold 7 in the third receiving groove 10. In this embodiment, two sets of third positioning posts 43 and positioning holes 22 are provided, and the two third positioning posts 43 are symmetrically arranged on opposite sides of the boss 13.

[0069] Reference Figure 16 、 Figure 17 and Figure 18 The third movable mold 52 has a third limiting hole 44 at the position corresponding to the limiting post 23, for the limiting post 23 to pass through. Furthermore, a third guide post 45 is vertically fixed to the third fixed mold 51, and a third guide hole 46 is correspondingly formed in the third movable mold 52 for the third guide post 45 to pass through. In this embodiment, the number of third guide posts 45 is also set to four, and the four third guide posts 45 are located at the four end corners of the surface of the third fixed mold 51 facing the third movable mold 52.

[0070] This embodiment also discloses an automatic production line for silicone noise reduction ear caps, including the above-mentioned injection molding module, referring to Figure 19, further comprising a first injection molding machine 28, a second injection molding machine 29, a third injection molding machine 30, a first manipulator 33, a second manipulator 34, a third manipulator 35, a fourth manipulator 36, a material taking platform 37 and a conveyor line 38, the first mold 1 is mounted on the first injection molding machine 28, the second mold 3 is mounted on the second injection molding machine 29, and the third mold 5 is mounted on the third injection molding machine 30, the first injection molding machine 28, the second injection molding machine 29 and the third injection molding machine 30 are arranged side by side in sequence, the first manipulator 33 is arranged between the first injection molding machine 28 and the second injection molding machine 29 for transferring the movable bottom mold 7 from the first fixed mold part 11 to the second fixed mold part 31, the second manipulator 34 is arranged between the second injection molding machine 29 and the third injection molding machine 30 for transferring the movable bottom mold 7 from the second fixed mold part 31 to the third fixed mold In component 51, a conveyor line 38 is located on one side of the first, second, and third injection molding machines 28, 29, and 30 and is arranged along the transfer direction of the movable bottom mold 7. The conveyor line 38 is in the opposite direction of the transfer of the movable bottom mold 7 in the first, second, and third injection molding machines 28, 29, and 30. The material removal platform 37 is located near the beginning of the conveyor line 38. The third manipulator 35 is located between the third injection molding machine 30 and the material removal platform 37 and is used to transfer the movable bottom mold 7 from the third fixed mold component 51 to the material removal platform 37. The fourth manipulator 36 is located near the end of the conveyor line 38 and is used to transfer the movable bottom mold 7 from the conveyor line 38 to the first injection molding machine 28 after material removal. This cycle is achieved, realizing the recycling of the movable bottom mold 7 and a high degree of automation, which is conducive to improving the production efficiency of noise-reducing ear caps. It should be noted that the first manipulator 33, the second manipulator 34, the third manipulator 35, and the fourth manipulator 36 are all located at the handle slot 27 of the movable bottom mold 7.

[0071] The implementation principle of an injection molding module and an automatic production line for silicone noise-reducing ear caps according to an embodiment of the present application is as follows: when batch production of silicone noise-reducing ear caps is required, the fourth manipulator 36 transfers the empty movable bottom mold 7 at the end of the conveyor line 38 to the first set of molds 1 of the first injection molding machine 28, and the movable bottom mold 7 is placed in the first accommodating groove 8. At this time, the position of the protruding column 13 corresponds to the position of the first groove 14. Then the first movable mold 12 moves toward the direction close to the first fixed mold 11 to close the first movable mold 12 and the first fixed mold 11. At this time, the side wall of the protruding column 13 and the groove wall of the first groove 14 are combined to form a first molding cavity. The molten silicone is injected into the first molding cavity through the first injection hole 2 for cooling and solidification molding, so as to achieve the alignment of the ear cap with the sound cavity of the earphone. The connecting part is formed, and then the first manipulator 33 transfers the movable bottom mold 7 from the first set mold 1 to the second set mold 3, and the movable bottom mold 7 is placed in the second accommodating groove 9. At this time, the position of the boss 13 corresponds to the position of the second groove 15. Then the second movable mold 32 moves toward the direction close to the second fixed mold 31 to close the second movable mold 32 and the second fixed mold 31. At this time, the side wall of the boss 13 and the groove wall of the second groove 15 are surrounded to form a second molding cavity. The molten silica gel with foaming agent added is injected into the second molding cavity through the second glue injection hole 4 for cooling and solidification molding, so as to realize the molding of the middle part of the ear cap based on the connecting part between the ear cap and the earphone sound cavity. Then the second manipulator 34 transfers the movable bottom mold 7 from the second set mold 3 to the third The third manipulator 35 transfers the movable bottom mold 7 from the third set of molds 5 to the material taking platform 37, and the staff takes out the noise reduction ear cap formed on the movable bottom mold 7 and places the empty movable bottom mold 7 on the conveyor line 38 for conveying, so that the fourth manipulator 36 transfers the empty movable bottom mold 7 to the first injection molding machine 28 for molding again, and so on. The cycle is repeated to realize the recycling of the movable bottom mold 7, with a high degree of automation, which is conducive to improving the production efficiency of the noise reduction ear cap, and the middle part of the molded ear cap is made of silicone with a foaming agent added, so that The middle part of the ear cap is formed with fine holes, so that a plurality of sound insulation cavities are generated in the middle part of the ear cap, thereby achieving the sound insulation and noise reduction effect of silicone foaming. The connection part of the ear cap with the sound cavity of the earphone and the ear-contact part of the ear cap are formed by silicone injection molding. The middle part of the ear cap is injection molded by silicone with the addition of a foaming agent. The connection part of the ear cap with the sound cavity of the earphone and the ear-contact part of the ear cap are located at both ends of the middle part of the ear cap to play a supporting role, which is beneficial to improve the structural strength. While improving the sound insulation and noise reduction effect, it is beneficial to ensure the structural strength of the ear cap, and the ear-contact part of the ear cap is usually folded outward to wrap the middle part of the ear cap. The fine holes in the middle part of the ear cap due to the addition of the foaming agent are covered by the ear-contact part of the ear cap, thereby avoiding reducing the aesthetics of the ear cap.

[0072] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An injection molding module for silicone noise reduction ear caps, characterized in that: include: A first mold set (1), the first mold set (1) comprising a first fixed mold part (11) and a first movable mold part (12) that cooperate with each other, the first movable mold part (12) being provided with a first glue injection hole (2), and the first movable mold part (12) moving in a direction close to or away from the first fixed mold part (11) to achieve mold closing and mold opening; A second set of molds (3), the second set of molds (3) comprising a second fixed mold part (31) and a second movable mold part (32) that cooperate with each other, the second movable mold part (32) being provided with a second glue injection hole (4), and the second movable mold part (32) moving in a direction close to or away from the second fixed mold part (31) to achieve mold closing and mold opening; A third set of molds (5), the third set of molds (5) comprising a third fixed mold part (51) and a third movable mold part (52) that cooperate with each other, the third movable mold part (52) being provided with a third glue injection hole (6), and the third movable mold part (52) moving in a direction close to or away from the third fixed mold part (51) to achieve mold closing and mold opening; A movable bottom mold (7) is sequentially arranged in the first sleeve mold (1), the second sleeve mold (3) and the third sleeve mold (5); the first fixed mold (11) is provided with a first accommodating groove (8) for accommodating the movable bottom mold (7); the second fixed mold (31) is provided with a second accommodating groove (9) for accommodating the movable bottom mold (7); the third fixed mold (51) is provided with a third accommodating groove (10) for accommodating the movable bottom mold (7); the movable bottom mold (7) is provided with a convex column (13); the first movable mold (12) is correspondingly provided with a first groove (14); when the movable bottom mold (7) is accommodated in the first accommodating groove (8) and the first movable mold (12) and the first fixed mold (11) are molded together, the side wall of the convex column (13) and the groove wall of the first groove (14) are combined to form a first molding part for molding the connection part between the ear cap and the earphone sound cavity. The first glue injection hole (2) is connected to the first molding cavity; the second movable mold (32) is provided with a second groove (15); when the movable bottom mold (7) is accommodated in the second accommodating groove (9) and the second movable mold (32) is molded with the second fixed mold (31), the side wall of the convex column (13) and the groove wall of the second groove (15) are combined to form a second molding cavity for molding the middle part of the ear cap, and the second glue injection hole (4) is connected to the second molding cavity; the third movable mold (52) is provided with a third groove (16); when the movable bottom mold (7) is accommodated in the third accommodating groove (10) and the third movable mold (52) is molded with the third fixed mold (51), the side wall of the convex column (13) and the groove wall of the third groove (16) are combined to form a third molding cavity for molding the ear-adhering part of the ear cap, and the third glue injection hole (6) is connected to the third molding cavity.

2. The injection molding module for silicone noise-reducing ear cap according to claim 1, characterized in that: A first ring cylinder (17) is provided at the bottom of the first groove (14) around the outlet position of the first glue injection hole (2). The first ring cylinder (17) is coaxially connected to the first glue injection hole (2). A contact block (18) is provided at the bottom of the first ring cylinder (17). When the first movable mold (12) and the first fixed mold (11) are closed, the contact block (18) contacts the top of the convex column (13). The gap between the bottom of the first ring cylinder (17) and the top of the convex column (13) forms a channel for connecting the first glue injection hole (2) and the first molding cavity.

3. The injection molding module for silicone noise-reducing ear cap according to claim 2, characterized in that: A second ring cylinder (19) is provided at the bottom of the second groove (15) around the outlet position of the second glue injection hole (4). The second ring cylinder (19) is coaxially connected to the second glue injection hole (4). A notch (20) is provided at the bottom of the second ring cylinder (19). The position of the notch (20) provided in the second ring cylinder (19) corresponds to the position of the abutment block (18) provided in the first ring cylinder (17). When the second movable mold (32) and the second fixed mold (31) are closed, the bottom of the second ring cylinder (19) and the top of the first molding cavity are located on the same horizontal plane.

4. The injection molding module for silicone noise-reducing ear cap according to claim 1, characterized in that: The first accommodating groove (8) is vertically fixed with a first positioning column (21), and the movable bottom mold (7) is correspondingly provided with a positioning hole (22) for the first positioning column (21) to movably penetrate.

5. The injection molding module for silicone noise-reducing ear cap according to claim 1, characterized in that: The movable bottom mold (7) is vertically fixed with a limiting column (23), and the first movable mold part (12) is correspondingly provided with a first limiting hole (24) for the limiting column (23) to penetrate.

6. The injection molding die set for silicone noise reduction ear caps according to claim 5, characterized in that: The limiting column (23) is arranged in a truncated cone shape.

7. The injection molding die set for silicone noise reduction ear caps according to claim 1, characterized in that: The first fixed mold part (11) is vertically fixed with a first guide column (25), and the first movable mold part (12) is correspondingly provided with a first guide hole (26) for the first guide column (25) to penetrate.

8. The injection molding module for silicone noise-reducing ear cap according to claim 1, characterized in that: The first accommodating groove (8), the second accommodating groove (9) and the third accommodating groove (10) are all arranged in the form of through grooves. The length of the movable bottom mold (7) is greater than the lengths of the first fixed mold (11), the second fixed mold (31) and the third fixed mold (51). When the movable bottom mold (7) is accommodated in the first accommodating groove (8), the two ends of the movable bottom mold (7) in the length direction are respectively passed through the two ends of the first accommodating groove (8) that are in communication with each other. When the movable bottom mold (7) is accommodated in the second accommodating groove (9), the two ends of the movable bottom mold (7) in the length direction are respectively passed through the two ends of the second accommodating groove (9) that are in communication with each other. When the movable bottom mold (7) is accommodated in the third accommodating groove (10), the two ends of the movable bottom mold (7) in the length direction are respectively passed through the two ends of the third accommodating groove (10).

9. The injection molding module for silicone noise-reducing ear cap according to claim 1, characterized in that: Handle grooves (27) are symmetrically provided at both ends of the movable bottom mold (7).

10. An automatic production line for silicone noise-reducing ear caps, comprising the injection molding module according to any one of claims 1 to 9, characterized in that: The system further comprises a first injection molding machine (28), a second injection molding machine (29), a third injection molding machine (30), a first manipulator (33), a second manipulator (34), a third manipulator (35), a fourth manipulator (36), a material taking platform (37) and a conveyor line (38), wherein the first mold set (1) is mounted on the first injection molding machine (28), the second mold set (3) is mounted on the second injection molding machine (29), the third mold set (5) is mounted on the third injection molding machine (30), and the first injection molding machine (28) is mounted on the second injection molding machine (29). The first manipulator (33) is arranged between the first injection molding machine (28) and the second injection molding machine (29) and is used to transfer the movable bottom mold (7) from the first fixed mold part (11) to the second fixed mold part (31); the second manipulator (34) is arranged between the second injection molding machine (29) and the third injection molding machine (30) and is used to transfer the movable bottom mold (7) from the first fixed mold part (11) to the second fixed mold part (31); and the second manipulator (34) is arranged between the second injection molding machine (29) and the third injection molding machine (30) and is used to transfer the movable bottom mold (7) from the first fixed mold part (11) to the second fixed mold part (31). (7) is transferred from the second fixed mold part (31) to the third fixed mold part (51), the conveying line (38) is located on one side of the first injection molding machine (28), the second injection molding machine (29) and the third injection molding machine (30) and is arranged along the transfer direction of the movable bottom mold (7), the conveying direction of the conveying line (38) is opposite to the transfer direction of the movable bottom mold (7) in the first injection molding machine (28), the second injection molding machine (29) and the third injection molding machine (30), and the conveying direction of the conveying line (38) is opposite to the transfer direction of the movable bottom mold (7) in the first injection molding machine (28), the second injection molding machine (29) and the third injection molding machine (30). The material taking platform (37) is close to the head end of the conveyor line (38), the third manipulator (35) is located between the third injection molding machine (30) and the material taking platform (37) and is used to transfer the movable bottom mold (7) from the third fixed mold (51) to the material taking platform (37), and the fourth manipulator (36) is close to the end of the conveyor line (38) and is used to transfer the movable bottom mold (7) after material taking from the conveyor line (38) to the first injection molding machine (28).

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