Optical cable jacket injection molding apparatus

Abstract

The present application relates to the technical fields of optical cable sheath injection molding, in particular to an optical cable sheath injection molding device, comprising a base, a top of the base is fixedly installed with an injection device, further comprising a mold assembly in communication with the injection device, the mold assembly comprises a core installed on the top of the base through a moving assembly, the core is fixedly connected with a second cylindrical shell, and a vibration demolding assembly is arranged in the second cylindrical shell and the core, the vibration demolding assembly comprises a second hollow rod penetrating through the second cylindrical shell and extending into the core, and a plurality of vibration assemblies are uniformly arranged in the core along the axial direction. In the present application, ceramic particles produce random collisions under the double actions of the rotation of the arc-shaped rubber block and the vibration of the third vibration block, can cover every tiny area inside the sleeve body, can fully damage the intermolecular force and mechanical engagement between the optical cable sheath and the core, can avoid the problem of incomplete demolding caused by local adhesion, and can realize uniform separation of the whole surface of the sleeve body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical cable sheath injection molding, in particular to an optical cable sheath injection molding device. BACKGROUND

[0002] At present, in the injection molding process of the traditional optical cable sheath injection molding device, the sheath body part often causes incomplete demolding due to adhesion problems. The optical cable sheath sheath body has the characteristics of large length-diameter ratio and thin wall thickness. After injection cooling, it is closely combined with the surface of the core, the intermolecular force is significantly enhanced, and the traditional demolding method is difficult to destroy this adhesion force in all directions and uniformly, so that local adhesion phenomenon easily occurs between the sheath body and the core, thereby causing poor demolding effect. SUMMARY

[0003] The purpose of the present application is to solve the problem of poor demolding effect caused by the difficulty of destroying the adhesion force in all directions and uniformly in the prior art, and to provide an optical cable sheath injection molding device.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: an optical cable sheath injection molding device, comprising a base, a injection device fixedly installed on the top of the base, a mold assembly communicated with the injection device, the mold assembly comprising a core installed on the top of the base through a moving assembly, the core is fixedly connected with a second cylindrical shell, and a vibration demolding assembly is arranged in the second cylindrical shell and the core, the vibration demolding assembly comprises a second hollow rod penetrating through the second cylindrical shell and extending into the core, and the second hollow rod is rotatably and slidably connected with the second cylindrical shell, a driving assembly for driving the second hollow rod to rotate is arranged in the second cylindrical shell, a plurality of vibration assemblies are uniformly arranged in the core along the axial direction, the vibration assembly comprises a plurality of arc-shaped rubber blocks arranged in an annular array, and the arc-shaped rubber blocks are fixedly connected with the second hollow rod through spring expansion rods, a third vibration block is fixedly installed in the inside of the arc-shaped rubber block, and a cavity is formed therein, and ceramic particles are filled in the cavity.

[0005] Preferably, the top of the base is fixedly installed with a first protective shell and a second protective shell which are in internal communication, the mold assembly further comprises a fixed mold and a movable mold, a hydraulic rod for opening and closing the mold is fixedly installed on the inner wall of the second protective shell, the movable mold is fixedly installed on the telescopic end of the hydraulic rod, and the fixed mold is fixedly installed on the inner wall of the second protective shell and arranged opposite to the movable mold.

[0006] Preferably, the vibration demolding assembly further comprises a first vibration block and a second vibration block, the first vibration block is in shape fit with the pipe head of the core, the second vibration block is fit with the pipe shoulder part of the core, the inner wall of the second cylindrical shell is fixedly connected with a fixed rod, and the fixed rod is fixedly connected with the first vibration block and the second vibration block through the inside of the second hollow rod.

[0007] Preferably, the inside of the second cylindrical shell is fixedly installed with a first fixed plate through a first electric telescopic rod, the second hollow rod is rotationally connected with the first fixed plate, the outer wall of the second hollow rod is fixedly sleeved with a first gear ring, and the driving assembly comprises a micro motor fixedly installed on the side wall of the first fixed plate, and the output end of the micro motor is fixedly connected with a second gear meshing with the first gear ring.

[0008] Preferably, the moving assembly comprises a lead screw rotationally connected on the top of the base, the outer wall of the lead screw is threadedly connected with a moving seat, and the bottom of the moving seat is slidingly connected with the top of the base, the inner wall of the first protective shell is fixedly installed with a fixed shell, two second sector blocks symmetrically arranged above and below are arranged on the fixed shell, a first cylindrical shell is fixedly installed on one of the second sector blocks, and the other second sector block is fixedly connected with a second cylindrical shell, and the moving seat is located directly below the two second sector blocks.

[0009] Preferably, a plurality of telescopic locking blocks are fixedly installed in the moving seat, and the arc surfaces of the two second sector blocks are each provided with a clamping groove matched with the locking blocks.

[0010] Preferably, the fixed shell is provided with a conversion assembly for converting the positions of the two second sector blocks, the conversion assembly comprises two first sector blocks slidingly connected with the fixed shell, the centers of the two first sector blocks and the two second sector blocks are consistent, the central angle of the first sector block is greater than 90 degrees, the central angle of the second sector block is less than 90 degrees, the arc surfaces of the two first sector blocks are each provided with a gear tooth, the side wall of the fixed shell is fixedly installed with two driving motors, the two driving motors are each one-to-one corresponding to the two first sector blocks, the output end of the driving motor is fixedly connected with a first gear, the first gear is meshed with the gear tooth of the corresponding first sector block, the arc surfaces of the two second sector blocks are each fixedly installed with an arc block, and the top of the moving seat is provided with an arc-shaped groove matched with the arc block.

[0011] Preferably, the first cylindrical shell is provided with a pneumatic demolding assembly, the pneumatic demolding assembly comprises a blowing and suction fan fixedly installed on the inner wall of the first cylindrical shell, the outer wall of the blowing and suction fan is fixedly communicated with a first gas conveying pipe and a third gas conveying pipe, a sleeve body of the first gas conveying pipe is provided with a plurality of air holes, the outer wall of the first cylindrical shell is rotatably and slidably connected with a first hollow rod, the first gas conveying pipe penetrates through the first hollow rod in the axial direction, the outer wall of the first hollow rod is arranged with a plurality of gas conveying assemblies in the axial direction, the gas conveying assembly comprises a plurality of second gas conveying pipes fixedly communicated with the first hollow rod, and the plurality of second gas conveying pipes are arranged in an annular array.

[0012] Preferably, the outer wall of the blowing and suction fan is fixedly connected with a second fixed plate through a second electric telescopic rod, the second fixed plate is rotatably connected with the first hollow rod, the outer wall of the first hollow rod is fixedly sleeved with a second gear ring, and the outer wall of the second fixed plate is rotatably connected with a third gear meshing with the second gear ring.

[0013] Preferably, the top of the base is provided with a material guiding channel corresponding to the fixed mold position, and an inclined guide plate is fixedly installed between the material guiding channel and the fixed mold, and the sidewall of the base is provided with a discharge port communicated with the material guiding channel.

[0014] Compared with the prior art, the application has the following advantages:

[0015] According to the structural characteristics of different parts of the optical cable sheath, different frequencies and amplitudes of vibration are adopted, high-frequency low-amplitude vibration at the pipe head can accurately separate the threaded part from the core, avoiding damage to the threaded structure; medium-frequency vibration at the pipe shoulder can effectively overcome the demolding resistance caused by structural discontinuity; and low-frequency continuous vibration of the sleeve body can solve the demolding difficulty problem caused by adhesion in the length-diameter ratio area, thereby improving the overall demolding efficiency and quality.

[0016] The ceramic particles in the hollow cavity produce random collisions under the dual action of the arc-shaped rubber block rotation and the third vibration block vibration, can cover every small area inside the sleeve body, can destroy the intermolecular force and mechanical engagement between the optical cable sheath and the core in all directions, avoid the problem of incomplete demolding caused by local adhesion, and realize uniform separation of the whole surface of the sleeve body; meanwhile, the harder area near the pipe shoulder adopts fewer larger ceramic particles, uses the concentrated force generated by large particle collision to effectively overcome the adhesion resistance of hard ground; the softer area away from the pipe shoulder adopts more smaller ceramic particles, and through the dispersion collision of small particles, the force is evenly distributed on a larger area, avoiding the deformation or damage of the soft sleeve caused by excessive local stress.

[0017] The application drives the second hollow rod to rotate through the micro motor, drives the second hollow rod to move axially through the first electric telescopic rod, drives the arc-shaped rubber block to form a spiral vibration track, the tangential friction force generated by rotation loosens the adhesion interface horizontally, the longitudinal impact force generated by axial movement destroys the local adhesion point, and the two superimposed form a "wringing effect", compared with a single motion mode, the adhesion layer of the whole length of the sleeve body can be quickly and completely stripped, and the single demolding time is shortened, meanwhile, the axial movement of the spring telescopic rod cooperates with the arc-shaped rubber block, the arc-shaped rubber block is always pushed to adhere to the inner wall of the sleeve body according to the diameter change of the sleeve body, so that the problem that the vibration demolding effect is poor due to too large or too small gap is avoided.

[0018] In the pneumatic demolding assembly, the second gas conveying pipe rotates through the third gear drive and moves axially through the second electric telescopic rod to form a spiral track, and the large-flow gas flow of the pipe head and the small-flow gas flow of the sleeve body are matched, so that the strong adhesion of the pipe head and the pipe shoulder can be quickly broken, and all areas of the sleeve body can be covered gently, blind areas of the gas flow are avoided, and the demolding success rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The whole structure schematic diagram of the optical cable sheath injection molding device is provided in the application;

[0020] Figure 2 The side view of the optical cable sheath injection molding device is provided in the application;

[0021] Figure 3 The internal structure schematic diagram of the optical cable sheath injection molding device is provided in the application;

[0022] Figure 4 The structure schematic diagram of the first sector block of the optical cable sheath injection molding device is provided in the application;

[0023] Figure 5 The structure schematic diagram of the second sector block of the optical cable sheath injection molding device is provided in the application;

[0024] Figure 6 The full section structure schematic diagram of the second sector block of the optical cable sheath injection molding device is provided in the application;

[0025] Figure 7 The full section structure schematic diagram of the core of the optical cable sheath injection molding device is provided in the application;

[0026] Figure 8 The full section structure schematic diagram of the first cylindrical shell of the optical cable sheath injection molding device is provided in the application;

[0027] Figure 9 The full section structure schematic diagram of the arc-shaped rubber block of the optical cable sheath injection molding device is provided in the application.

[0028] In the figure: 1 base, 2 injection device, 3 first protective shell, 4 second protective shell, 5 fixed shell, 6 hydraulic rod, 7 movable mold, 8 guide plate, 9 screw rod, 10 moving seat, 11 fixed mold, 12 first cylindrical shell, 13 discharge port, 14 first sector block, 15 second sector block, 16 second cylindrical shell, 17 first hollow rod, 18 first gas conveying pipe, 19 second gas conveying pipe, 20 third gas conveying pipe, 21 first gear, 22 driving motor, 23 core, 24 first vibration block, 25 second vibration block, 26 arc-shaped rubber block, 27 spring telescopic rod, 28 second hollow rod, 29 first tooth ring, 30 second gear, 31 first electric telescopic rod, 32 fixed rod, 33 second tooth ring, 34 third gear, 35 second electric telescopic rod, 36 blowing and suction fan, 37 third vibration block, 38 cavity, 39 locking block, 40 arc-shaped block, 41 first fixed plate, 42 second fixed plate, 43 optical cable sheath. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0030] Reference Figures 1 to 9 The optical cable sheath injection molding device comprises a base 1, a first protective shell 3 and a second protective shell 4 fixedly installed at the top of the base 1 and in communication with each other, a mold assembly installed in the second protective shell 4, the mold assembly comprising a fixed mold 11, a movable mold 7 and a core 23, a hydraulic rod 6 fixedly installed on the inner wall of the second protective shell 4, the movable mold 7 fixedly installed on the telescopic end of the hydraulic rod 6, the fixed mold 11 fixedly installed on the inner wall of the second protective shell 4 and arranged opposite to the movable mold 7, the hydraulic rod 6 driving the movable mold 7 to move along the horizontal direction and close to the fixed mold 11, and a gap for accommodating the core 23 formed between the movable mold 7 and the fixed mold 11 after closing.

[0031] The top of the base 1 is provided with a moving assembly, the moving assembly comprises a lead screw 9 rotatably connected to the top of the base 1, the outer wall of the lead screw 9 is threadedly connected with a moving seat 10, and the bottom of the moving seat 10 is slidably connected with the top of the base 1, the inner wall of the first protective shell 3 is fixedly connected with a fixed shell 5, the fixed shell 5 is provided with two second sector blocks 15 which are symmetrically distributed upward and downward, the second sector blocks 15 can slide along the inner wall of the fixed shell 5, and one of the second sector blocks 15 is fixedly connected with a first cylindrical shell 12, and the other second sector block 15 is fixedly connected with a second cylindrical shell 16, the second cylindrical shell 16 is located below the first cylindrical shell 12 in the initial state, a core 23 is fixedly connected to one end of the second cylindrical shell 16 close to the mold assembly, the moving seat 10 is located directly below the two second sector blocks 15, a plurality of telescopic locking blocks 39 are fixedly connected to the inside of the moving seat 10, the arc surfaces of the second sector blocks 15 are all provided with clamping grooves matched with the locking blocks 39, the telescopic ends of the locking blocks 39 can be telescopically inserted into the clamping grooves of the corresponding second sector blocks 15, so that the moving seat 10 and the second sector blocks 15 are locked, the lead screw 9 can drive the moving seat 10 to drive the second sector block 15 provided with the second cylindrical shell 16 to move along the horizontal direction, so that the core 23 enters between the movable mold 7 and the fixed mold 11 and is enclosed together with the movable mold 7 and the fixed mold 11 to form a sealed cavity space, the cavity space is used for injection molding of an optical cable sheath 43, an injection device 2 (which is prior art and will not be described here) is fixedly connected to the corresponding position of the top of the base 1 close to the fixed mold 11, the discharge end of the injection device 2 is communicated with the cavity space, a screw rod for conveying and melting plastic particles is arranged in the injection device 2, the molten plastic can be injected into the closed cavity space, and after the optical cable sheath 43 with a required shape is formed, the pressure is maintained through a pressure maintaining stage to prevent the melt from shrinking and ensure the filling density, the inside of the movable mold 7 and the fixed mold 11 are both provided with cooling channels for cooling and solidifying the optical cable sheath 43 after injection molding, the cooling channels are cooled after the injection is completed, so that the optical cable sheath 43 is solidified and formed, and then demolding work is started.

[0032] The outer shape of the core 23 is matched with the inner wall shape of the cable jacket 43, including a tube head, a tube shoulder, and a sleeve body structure. The inside of the core 23 is a hollow structure. The core 23 and the second cylindrical shell 16 are jointly provided with a vibration demolding assembly. The vibration demolding assembly includes a first vibration block 24 and a second vibration block 25. The shape of the first vibration block 24 is matched with the tube head inside the core 23. The second vibration block 25 is matched with the tube shoulder part inside the core 23. The inner wall of the second cylindrical shell 16 is fixedly connected with a fixed rod 32. The inside of the core 23 is provided with a second hollow rod 28. The second hollow rod 28 is rotationally and slidingly connected with the second cylindrical shell 16. The fixed rod 32 penetrates through the inside of the second hollow rod 28 and is fixedly connected with the first vibration block 24 and the second vibration block 25. The tube head of the cable jacket 43 is relatively small and has threads. Therefore, the first vibration block 24 adopts high-frequency low-amplitude vibration during demolding. The high frequency can weaken the adhesion force through rapid and small vibration, avoiding the extrusion or wear of the precise threads caused by traditional strong vibration. The low amplitude reduces local stress concentration, prevents thread deformation or fracture, and ensures the integrity of the tube head structure. The tube shoulder of the cable jacket 43 is relatively thick and is a structure mutation area. Therefore, the second vibration block 25 adopts medium-frequency vibration. The medium amplitude can effectively loosen the adhesion interface of the thick wall part, and avoid stress concentration in the structure mutation area (the connection between the tube shoulder and the tube head / sleeve body) caused by excessive amplitude, preventing cracking or deformation, and balancing the demolding efficiency and structural stability. Through differential vibration parameters, the tube head and the tube shoulder can realize efficient demolding at the same time, and the respective damage risk is the lowest. This not only shortens the single demolding time, but also greatly reduces the product scrap rate caused by improper demolding, improves the production stability, and the first vibration block 24 and the second vibration block 25 are both made of rubber material. The deformation ability of the rubber can ensure the close fit between the vibration block and the tube head and the tube shoulder of the core 23, and ensure that the vibration energy is efficiently transmitted to the adhesion interface.

[0033] The outer wall of the second hollow rod 28 is uniformly provided with a plurality of vibration assemblies along the axis direction. The vibration assembly includes a plurality of arc-shaped rubber blocks 26 fixedly connected with the second hollow rod 28 through spring expansion rods 27. The plurality of arc-shaped rubber blocks 26 are arranged in a ring array. The outer shape of the arc-shaped rubber block 26 is matched with the sleeve body inside the core 23. The inside of the arc-shaped rubber block 26 is fixedly provided with a third vibration block 37. Since the sleeve body of the cable jacket 43 is long and thin, the length-diameter ratio area is prone to demolding difficulty caused by overall adhesion. Therefore, low-frequency continuous vibration is adopted here. The low-frequency continuous vibration can gradually destroy the intermolecular force between the sleeve body and the core 23 through continuous and uniform energy input, rather than short-time impact, ensuring that the adhesion force is uniformly weakened from the full length of the sleeve body, preventing the overall resonance of the sleeve body caused by high-frequency vibration, and avoiding stress concentration caused by twisting, excessive stretching, and local energy accumulation.

[0034] The interior of the second cylindrical shell 16 is fixedly provided with a first fixed plate 41 through a first electric telescopic rod 31, the second hollow rod 28 is rotationally connected with the first fixed plate 41, the outer wall of the second hollow rod 28 is fixedly sleeved with a first tooth ring 29, the side wall of the first fixed plate 41 is fixedly provided with a micro motor (not shown in the figure), the output end of the micro motor is fixedly connected with a second gear 30 engaged with the first tooth ring 29, the micro motor drives the first tooth ring 29 to drive the second hollow rod 28 and the plurality of arc-shaped rubber blocks 26 to rotate through the second gear 30, at the same time, the first electric telescopic rod 31 drives the second hollow rod 28 to move axially, forming a spiral vibration track, the tangential friction generated by rotation can loosen the adhered interface between the sleeve and the core 23 horizontally, the longitudinal impact force generated by axial movement can directly destroy the local adhered contact point, and the two are superimposed to form a “rubbing” action, compared with single rotation or single axial vibration, the adhered layer of the full-length sleeve can be stripped more quickly and completely. When the spring telescopic rod 27 moves forward and backward of the arc-shaped rubber block 26, the length is changed in time through contraction, no matter whether the diameter of the sleeve is gradually changed or fixed, the spring telescopic rod 27 can always adhere to the inner wall of the sleeve through the self-elastic force, avoid that the gap between the arc-shaped rubber block 26 and the sleeve is too large due to the change of the diameter, resulting in that the vibration energy cannot be transmitted, or the gap is too small, resulting in that the sleeve is deformed by extrusion, through the self-adaptive adjustment of the spring telescopic rod 27, the stripping requirements of various specifications of the sleeve can be compatible, and the universality of the device is improved.

[0035] The arc-shaped rubber block 26 is internally provided with a cavity 38, the third vibration block 37 is located at the center position of the cavity 38, and ceramic particles are placed in the cavity 38. When the arc-shaped rubber block 26 rotates, the ceramic particles flow, and the flowing ceramic particles randomly collide under the vibration action of the third vibration block 37, can cover every small area inside the sleeve, destroy the intermolecular force and mechanical engagement between the cable jacket 43 and the core 23, form full surface contact, and ensure that there is no stripping blind area. At the same time, the ceramic particles and the sleeve are in dynamic point contact, the contact time is short, and the pressure of a single particle is small, avoiding rigid friction damage. Since the closer the sleeve region of the cable jacket 43 is to the position of the pipe shoulder, the harder the sleeve is, and the farther the position away from the pipe shoulder is, the softer the sleeve is, therefore, fewer and larger ceramic particles are placed in the cavity 38 near the pipe shoulder, the impact of the harder sleeve on the ceramic particles has better resistance, the larger ceramic particles can provide stronger force when flowing, which is helpful to overcome the adhesion between the sleeve and the mold, thereby more effectively achieving stripping. More small ceramic particles are placed away from the pipe shoulder, the softer sleeve is more sensitive to local force, the smaller and more ceramic particles can disperse the force to a larger area, reduce the impact on the local sleeve, and reduce the risk of damage. At the same time, more ceramic particles can increase the contact area with the sleeve and improve the stripping effect.

[0036] After a certain time of vibration demolding inside the core 23, the vibration frequency of the vibration demolding assembly is slowed down, and at the same time the lead screw 9 is started to drive the second sector block 15 to move the second cylindrical shell 16 and the core 23 away from the mold assembly, and the core 23 is vibrated while moving to perform the core-pulling work, and the moving seat 10 drives the second sector block 15 and the second cylindrical shell 16 to finally move between the two first sector blocks 14. The fixed shell 5 is provided with a conversion assembly for converting the positions of the two second sector blocks 15, the conversion assembly comprising two first sector blocks 14 in sliding connection with the fixed shell 5, the arc-shaped edge of the two first sector blocks 14 is provided with a gear tooth, and the side wall of the fixed shell 5 is fixedly installed with two drive motors 22, the two drive motors 22 are one-to-one corresponding to the two first sector blocks 14, the output end of the drive motor 22 is fixedly connected with a first gear 21, the first gear 21 is engaged with the gear tooth of the corresponding first sector block 14, the centers of the two first sector blocks 14 and the two second sector blocks 15 are consistent, and the central angle of the first sector block 14 is greater than 90 degrees, and the central angle of the second sector block 15 is less than 90 degrees, after the second sector block 15 with the second cylindrical shell 16 returns to the original position, the locking block 39 is first retracted into the moving seat 10 and unlocked with the second sector block 15, the drive motor 22 is started again, the first sector block 14 is driven to rotate through the first gear 21 and the gear tooth of the first sector block 14, and then the two second sector blocks 15 are synchronously rotated, the two second sector blocks 15 are transposed up and down, the positions of the first cylindrical shell 12 and the second cylindrical shell 16 are exchanged, and the arc-shaped surface of each second sector block 15 is fixedly installed with an arc block 40, and the top of the moving seat 10 is provided with an arc-shaped groove matched with the arc block 40, allowing the second sector block 15 to slide on the moving seat 10 along an arc-shaped track.

[0037] The first cylindrical shell 12 is provided with a pneumatic demolding assembly, which comprises a blowing and suction fan 36 fixedly installed on the inner wall of the first cylindrical shell 12. The outer wall of the blowing and suction fan 36 is fixedly connected with a first gas conveying pipe 18 and a third gas conveying pipe 20. The third gas conveying pipe 20 penetrates through and extends out of the first cylindrical shell 12. The sleeve body of the first gas conveying pipe 18 is provided with a plurality of air holes. The outer wall of the blowing and suction fan 36 is fixedly connected with a second fixed plate 42 through a second electric telescopic rod 35. The side, away from the blowing and suction fan 36, of the second fixed plate 42 is rotatably connected with a first hollow rod 17. The first hollow rod 17 is rotatably and slidably connected with the first cylindrical shell 12. The outer wall of the first hollow rod 17 is fixedly sleeved with a second gear ring 33. The outer wall of the second fixed plate 42 is rotatably connected with a third gear wheel 34 engaged with the second gear ring 33. The outer wall of the second fixed plate 42 is fixedly installed with a micro motor (not shown in the figure) for driving the third gear wheel 34 to rotate. The third gear wheel 34 drives the first hollow rod 17 to rotate through the second gear ring 33. The first gas conveying pipe 18 penetrates through the inside of the first hollow rod 17 along the axial direction. The outer wall of the first hollow rod 17 is arranged with a plurality of gas conveying assemblies along the axial direction. The gas conveying assembly comprises a plurality of second gas conveying pipes 19 fixedly connected with the first hollow rod 17. The plurality of second gas conveying pipes 19 are arranged in an annular array.

[0038] After the first cylindrical shell 12 is adjusted to the top of the moving seat 10, the locking block 39 in the moving seat 10 extends to lock the second sector block 15 where the first cylindrical shell 12 is located. The pneumatic demolding assembly is driven by the lead screw 9 to approach the mold assembly for pneumatic demolding. The first gas conveying pipe 18 and the second gas conveying pipe 19 extend into the optical cable sheath 43. The blowing and suction fan 36 is started to blow and suck. The part of the first gas conveying pipe 18 extending out of the first hollow rod 17 continuously blows and sucks the pipe head and the pipe shoulder of the optical cable sheath 43. The pipe head and the pipe shoulder have a short and thick structure. The first gas conveying pipe 18 provides a large air flow to quickly form a strong air flow impact on the short and thick pipe head and pipe shoulder, directly breaking the adhesion with the movable mold 7 and the fixed mold 11, avoiding the problem of strong adhesion and difficult to separate caused by thick structure. The second gas conveying pipe 19 corresponds to the sleeve body part of the optical cable sheath 43, and the air flow is smaller to avoid using large flow air flow to cause the local air pressure of the sleeve body to rise suddenly, the sleeve body to swell, wrinkle or internal stress concentration, and increase the risk of subsequent cracking. While the third gear wheel 34 drives the first hollow rod 17 to rotate, the second electric telescopic rod 35 drives the first hollow rod 17 to move forward and backward, thereby forming a spiral trajectory. This movement mode can cover all areas inside the sleeve body of the second gas conveying pipe 19, including the sleeve body sidewall, the transition section close to the pipe shoulder and other easily ignored positions, avoiding the problem of local residual adhesion caused by uneven air flow, further improving the one-time success rate of demolding and speeding up the demolding process. Small air flow combined with spiral movement can reduce adhesion in a gentle and uniform air pressure change manner, maximize the reduction of stress concentration inside the sleeve body and ensure the structural stability of the formed hose.

[0039] The top of the base 1 is provided with a material guiding channel corresponding to the position of the fixed mold 11, and the material guiding channel and the fixed mold 11 are fixedly provided with an inclined guide plate 8, the sidewall of the base 1 is provided with a discharge port 13 communicated with the material guiding channel, after the adhesion force is broken by the pneumatic demolding, the movable mold 7 is slowly removed, the lead screw 9 is started, the first gas conveying pipe 18 and the second gas conveying pipe 19 are removed while sucking and blowing air, the continuous air suction and blowing can form an air flow buffer layer between the inner wall of the pipe and the outer wall of the gas conveying pipe, reduce the friction and scratching caused by the direct contact of the two, avoid the scratches on the inner wall of the hose caused by friction, finally, the movable mold is completely moved to let the optical cable sheath 43 fall into the material guiding channel and be discharged from the discharge port 13, the inclined guide plate 8 can provide a buffer sliding path for the optical cable sheath 43, the falling impact force is dispersed through the inclined surface contact, the optical cable sheath 43 can be smoothly slid into the material guiding channel in a stable posture, and the product rejection rate is effectively reduced.

[0040] In use, the movable mold 7 moves to the fixed mold 11 under the drive of the hydraulic rod 6, the lead screw 9 drives the moving seat 10 to drive the core 23 to enter between the movable mold 7 and the fixed mold 11, and finally the movable mold 7, the fixed mold 11 and the core 23 form a sealed cavity space. Subsequently, the plastic particles are conveyed and melted by the screw rotation inside the injection device 2, and the molten plastic is finally injected into the closed cavity space to form the optical cable sheath 43 with the required shape, and then the pressure is maintained in the pressure maintaining stage to prevent the melt from shrinking and ensure the filling density. After the injection molding is completed, the cooling is performed through the cooling channels inside the movable mold 7 and the fixed mold 11, so that the optical cable sheath 43 is solidified and formed, and then the demolding of the optical cable sheath 43 is started.

[0041] When demolding, the first vibration block 24 and the second vibration block 25 inside the core 23 and the arc-shaped rubber block 26 are used to vibrate the inside of the core 23, so that the inner wall of the cable jacket 43 is separated from the surface of the core 23. The first vibration block 24 and the second vibration block 25 can be respectively located at the position of the pipe head and the pipe shoulder inside the core 23 for vibration demolding. The first vibration block 24 adopts high-frequency low-amplitude vibration, the second vibration block 25 should adopt medium-frequency vibration, and the cable jacket 43 adopts low-frequency continuous vibration. The second gear 30 is driven to rotate by the micro motor, the second gear 30 drives the second hollow rod 28 to rotate through the first gear ring 29, so as to drive the arc-shaped rubber block 26 to rotate. The arc-shaped rubber block 26 is filled with ceramic particles in the internal cavity 38. When the arc-shaped rubber block 26 rotates, the ceramic particles will flow, and the flowing ceramic particles will form random collisions under the vibration of the third vibration block 37, covering every small area of the jacket inside the core 23, destroying the intermolecular force and mechanical engagement between the cable jacket 43 and the core 23, and forming full surface contact. Because the ceramic particles and the jacket are dynamic point contact, the contact time is short and the pressure is dispersed, which avoids rigid friction damage. The rubber pad of the arc-shaped rubber block 26 acts as an elastic medium, which uniformly disperses the energy to the jacket through its own deformation, avoiding local stress concentration. For a longer and thinner jacket, if it is vibrated at the same time, it may not be able to effectively destroy the adhesion interface between the jacket and the core 23, and may also cause the whole jacket to resonate, causing the jacket to twist or locally overstretch, increasing the product scrap rate. Therefore, when the arc-shaped rubber block 26 is driven to rotate by the second hollow rod 28, the first electric telescopic rod 31 will stretch forward and backward, so that the arc-shaped rubber block 26 vibrates axially along the jacket part inside the core 23, destroying the adhesion contact point between the inner wall of the cable jacket 43 and the surface of the core 23, and then cooperates with the arc-shaped rubber block 26 to generate tangential friction force, and the adhesion layer is peeled off by the "rubbing" effect. The superposition of the two movements forms a spiral vibration track, which can uniformly destroy the adhesion layer. The spring telescopic rod 27 changes the length in time when the arc-shaped rubber block 26 moves forward and backward, and adapts to the change of the diameter of the jacket of the core 23.

[0042] After the core 23 is vibrated for a certain period of time, the vibration frequency of the first vibration block 24, the second vibration block 25 and the arc-shaped rubber block 26 is slowed down, and the lead screw 9 is started to move the moving seat 10, and the second sector block 15 is in a locked state, so that the moving seat 10 drives the core 23 to move, at this time, the core 23 moves while vibrating, thereby completing the whole core-pulling process. Until the moving seat 10 drives the second sector block 15 to move between the two first sector blocks 14, at this time, the locking block 39 is retracted, the drive motors 22 on both sides are started, and the first sector blocks 14 are driven to rotate through the first gears 21 on both sides and the gear teeth on the first sector blocks 14, thereby driving the two second sector blocks 15 to rotate, finally making the two second sector blocks 15 exchange positions, that is, the first cylindrical shell 12 and the second cylindrical shell 16 exchange positions. The position adjustment of the first cylindrical shell 12 and the second cylindrical shell 16 is quickly realized through the circular motion. Then, the first cylindrical shell 12 is moved by the lead screw 9 and the moving seat 10 until the first cylindrical shell 12 moves to the position of the second cylindrical shell 16. At this time, the first gas conveying pipe 18 and the second gas conveying pipe 19 extend into the optical cable sheath 43, and the blowing and suction fan 36 is started to blow and suck the inside of the optical cable sheath 43 through the first gas conveying pipe 18 and the second gas conveying pipe 19. The gas flows through the air holes in the first gas conveying pipe 18 to the second gas conveying pipe 19 and is then sprayed out, thereby reducing the adhesion between the surface of the optical cable sheath 43 and the inside of the movable mold 7 and the fixed mold 11 by changing the air pressure.

[0043] When the blowing and suction fan 36 starts to blow and suck, the part of the first gas conveying pipe 18 exposed from the first hollow rod 17 will continuously blow and suck the pipe head and the pipe shoulder of the optical cable sheath 43. Since the pipe head and the pipe shoulder have a short and thick structure, the air flow of the first gas conveying pipe 18 is large at this time, which can quickly destroy the adhesion without damaging the material. The air flow of the second gas conveying pipe 19 is small, which is suitable for the long and soft structure of the body to reduce the internal stress and prevent deformation. In addition, in the process of blowing and sucking, the third gear 34 drives the first hollow rod 17 to rotate through the second gear ring 33, thereby driving the second gas conveying pipe 19 to rotate, and the second electric telescopic rod 35 drives the second gas conveying pipe 19 to move forward and backward, thereby making the second gas conveying pipe 19 spiral, uniformly sucking and blowing all positions inside the body, and improving the uniformity of the air pressure in the body.

[0044] After a period of pneumatic demolding, the hydraulic rod 6 is started to slowly move away the movable mold 7, and then the lead screw 9 is started to drive the first gas conveying pipe 18 and the second gas conveying pipe 19 to move away from the inside of the optical cable sheath 43 while sucking and blowing, and when the first gas conveying pipe 18 and the second gas conveying pipe 19 completely move away from the inside of the optical cable sheath 43, the movable mold 7 is completely moved away, the optical cable sheath 43 falls into the guide channel in the base 1 through the guide plate 8, and finally falls out of the discharge port 13, thereby finally completing the preparation of the optical cable sheath 43.

[0045] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical cable jacket injection molding device, comprising a base (1), a top of the base (1) is fixedly provided with an injection device (2), characterized in that, Also include with injection device (2) communication mold assembly, the mold assembly includes through the moving assembly is installed in the top of the base 1 core (23), the core (23) is fixedly connected with the second cylindrical shell (16), and the second cylindrical shell (16) and the core (23) are provided with vibration demolding assembly in common, the vibration demolding assembly includes a second hollow rod (28) through the second cylindrical shell (16) and extends into the core (23), and the second hollow rod (28) is rotatably and slidably connected with the second cylindrical shell (16), the second cylindrical shell (16) is provided with a driving assembly for driving the second hollow rod (28) to rotate, the core (23) is uniformly arranged with a plurality of vibration assemblies along the axial direction, the vibration assembly includes a plurality of arc-shaped rubber blocks (26) arranged in an annular array, and the arc-shaped rubber blocks (26) are fixedly connected with the second hollow rod (28) through the spring telescopic rod (27), the inside of the arc-shaped rubber block (26) is fixedly installed with a third vibration block (37), and a cavity (38) is formed, and the cavity (38) is filled with ceramic particles, the top of the base (1) is fixedly installed with a first protective shell (3) and a second protective shell (4) which are in internal communication, the vibration demolding assembly further includes a first vibration block (24) and a second vibration block (25), the shape of the first vibration block (24) is matched with the pipe head of the core (23), the second vibration block (25) is matched with the pipe shoulder part of the core (23), the inner wall of the second cylindrical shell (16) is fixedly connected with a fixed rod (32), the fixed rod (32) penetrates the inside of the second hollow rod (28) and is fixedly connected with the first vibration block (24) and the second vibration block (25), the moving assembly includes a lead screw (9) rotatably connected to the top of the base (1), the outer wall of the lead screw (9) is threadedly connected with a moving seat (10), and the bottom of the moving seat (10) is slidably connected with the top of the base (1), the inner wall of the first protective shell (3) is fixedly installed with a fixed shell (5), two second sector blocks (15) are arranged on the fixed shell (5) in a symmetrical manner, one of the second sector blocks (15) is fixedly installed with a first cylindrical shell (12), and the other second sector block (15) is fixedly connected with the second cylindrical shell (16), the moving seat (10) is located directly below the two second sector blocks (15), the first cylindrical shell (12) is provided with a pneumatic demolding assembly, the pneumatic demolding assembly includes a blowing and suction fan (36) fixedly installed on the inner wall of the first cylindrical shell (12), the outer wall of the blowing and suction fan (36) is fixedly connected with a first gas pipe (18) and a third gas pipe (20), a plurality of air holes are formed in the sleeve of the first gas pipe (18), the outer wall of the first cylindrical shell (12) is rotatably and slidably connected with a first hollow rod (17), the first gas pipe (18) penetrates the inside of the first hollow rod (17) along the axial direction, the outer wall of the first hollow rod (17) is arranged with a plurality of gas supply assemblies along the axial direction,The gas feeding assembly comprises a plurality of second gas feeding tubes (19) fixedly communicated with the first hollow rod (17), and the plurality of second gas feeding tubes (19) are arranged in a ring array.

2. The optical cable jacket injection molding apparatus of claim 1, wherein, The mold assembly further comprises a fixed mold (11) and a movable mold (7), the inner wall of the second protective shell (4) is fixedly provided with a hydraulic rod (6) for mold opening and closing, the movable mold (7) is fixedly installed at the telescopic end of the hydraulic rod (6), and the fixed mold (11) is fixedly installed on the inner wall of the second protective shell (4) and oppositely arranged with the movable mold (7).

3. The optical cable jacket injection molding apparatus of claim 1, wherein, The inside of the second cylindrical shell (16) is fixedly provided with a first fixed plate (41) through a first electric telescopic rod (31), the second hollow rod (28) is rotationally connected with the first fixed plate (41), the outer wall of the second hollow rod (28) is fixedly provided with a first gear ring (29), and the driving assembly comprises a micro motor fixedly installed on the side wall of the first fixed plate (41), and the output end of the micro motor is fixedly connected with a second gear (30) engaged with the first gear ring (29).

4. The optical cable jacket injection molding apparatus of claim 2, wherein, The inside of the movable seat (10) is fixedly provided with a plurality of telescopic locking blocks (39), and the arc surfaces of the two second fan-shaped blocks (15) are provided with clamping grooves matched with the locking blocks (39).

5. The optical cable jacket injection molding apparatus of claim 4, wherein, The fixed shell (5) is provided with a conversion assembly for converting the positions of the two second fan-shaped blocks (15), the conversion assembly comprises two first fan-shaped blocks (14) in sliding connection with the fixed shell (5), the centers of the two first fan-shaped blocks (14) and the two second fan-shaped blocks (15) are consistent, the central angle of the first fan-shaped block (14) is greater than 90 degrees, the central angle of the second fan-shaped block (15) is less than 90 degrees, the arc surfaces of the two first fan-shaped blocks (14) are provided with gear teeth, the side wall of the fixed shell (5) is fixedly provided with two driving motors (22), the two driving motors (22) are one-to-one corresponding to the two first fan-shaped blocks (14), the output end of the driving motor (22) is fixedly connected with a first gear (21), the first gear (21) is engaged with the gear teeth of the corresponding first fan-shaped block (14), and the arc surfaces of the two second fan-shaped blocks (15) are fixedly provided with arc blocks (40).

6. The optical cable jacket injection molding apparatus of claim 5, wherein, The outer wall of the blowing and suction fan (36) is fixedly connected with a second fixed plate (42) through a second electric telescopic rod (35), the second fixed plate (42) is rotationally connected with the first hollow rod (17), the outer wall of the first hollow rod (17) is fixedly provided with a second gear ring (33), and the outer wall of the second fixed plate (42) is rotationally connected with a third gear (34) engaged with the second gear ring (33).

7. The optical cable jacket injection molding apparatus of claim 2, wherein, The top of the base (1) is provided with a material guiding channel corresponding to the position of the fixed mold (11), and an inclined guide plate (8) is fixedly installed between the material guiding channel and the fixed mold (11). The side wall of the base (1) is provided with a discharge port (13) in communication with the material guiding channel.

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