Silicone rubber protective sleeve forming mold

Abstract

The invention relates to the technical field of mold forming, in particular to a silicone rubber protective sleeve forming mold which comprises a rotating tower and double-color injection molds, the cross tail end of the rotating tower is provided with a cooling pipe used for forming a handle sleeve, and the double-color injection molds are arranged on the left side and the right side of the rotating tower. By arranging the driving assembly and the air injection part, in the process that an air cylinder contracts to the highest point when a male mold and a female mold are separated, the upper ejector rod is in passive contact with the driving assembly in the through hole, so that the clamping block contracts and leaves the pouring gate, and waste is separated from the pouring gate under the action of gravity due to contraction of the clamping block; and the waste is blown to the direction far away from the mold through the air injection piece, so that the time required by the steps of ejection during demolding and clamping and separation of the waste by a manipulator is saved, and the production efficiency of the silicon rubber protective sleeve forming mold is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mold forming, in particular to a silicone rubber protective cover forming mold. Background Art

[0002] Silicone rubber has good high and low temperature resistance, can work stably in the range of -60℃ to 200℃, and has good elasticity, can return to its original state under stress, and is suitable for making products that require flexibility such as protective covers. Common products include handlebar covers for bicycles. For the purpose of aesthetics or anti-slip, the handlebar covers need to adopt a vertical tower two-color injection molding process, so that the handlebar covers are formed in the mold at the same time, and the secondary injection molding gives the outer layer of the handlebar cover a friction-resistant heterochromatic texture. The existing horizontal injection molding requires frequent opening and closing of the mold during demolding and secondary injection molding due to its structure. The large number of process steps makes the efficiency of using the horizontal injection molding process to produce handlebar covers low.

[0003] In view of the above problems, the prior art provides some solutions. For example, the invention patent with patent application number CN202123275305.8 provides a vertical two-color injection molding machine, which includes an injection molding component, a rotary table component and a mold. Multiple molds are arranged on the rotary table component. After the injection molding component completes injection molding into one mold, the rotary table component is driven to drive the mold to rotate, and the injection molding component performs injection molding into another mold. The above-mentioned vertical two-color injection molding machine can realize rapid conversion of mold positions, and the motor control can accurately control the mold movement position, so that the injection molding component can accurately align the glue inlet on the mold, thereby improving the speed of handle production. In addition, the structure of the rotary table component is simple and stable, and the panel can remain stable during rotation without shaking. However, when the injection molding process completes the primary and secondary injection molding respectively, waste will remain in the runner (reference Figure 4 ), and the waste materials remaining in the runner when the handle sleeve is demolded need to be clamped by an external robot to be removed after the mold is ejected. While increasing the equipment maintenance cost, the two material removal steps also consume a lot of time, thus affecting production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a silicone rubber protective cover molding die to solve the problem that when a handle cover is demoulded, waste materials remaining in the flow channel need to be clamped by an external robot to be removed after the mold is ejected, so that the production efficiency of the handle cover cannot be improved; when the above problem occurs on the silicone rubber protective cover molding die, the molding efficiency of the handle cover generated by the molding die is reduced, and at the same time, the shortcomings of the existing technical solutions are solved.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A silicone rubber protective cover molding mold, comprising a turret and a two-color injection mold, wherein a cooling pipe for molding a handle cover is provided at the cross end of the turret, and the two-color injection mold is arranged on the left and right sides of the turret. Specifically, the two-color injection mold comprises a male mold and a female mold, wherein the male mold is provided with a runner for injection, and the female mold is provided with an auxiliary flow channel for auxiliary injection, and the runner is fitted with the auxiliary flow channel. A through hole is formed through the male mold and the female mold, wherein a driving component, an injection component and a connecting hole are provided in the through hole, and the connecting hole is connected with the runner. A clamping block is also provided on the driving component, and the driving component drives the clamping block to extend from the connecting hole into the runner by rotating, and causes the injection component to generate airflow outside the through hole by rotating.

[0007] It is easy to understand that the cylinder of the injection molding machine controls the up and down movement of the male mold to realize the mold separation and mold closing with the female mold. In this process, the cooling pipe enters the two-color injection mold on both sides through the rotation of the turret to perform injection molding of the silicone rubber protective cover. The molten silicone rubber flows into the auxiliary runner on the female mold through the runner on the male mold, so that the cooling pipe and the cavity between the male mold and the female mold are filled with molten silicone rubber. After the molten silicone rubber is cooled, it becomes a two-color handle cover. The silicone rubber remaining in the auxiliary runner and the runner is waste. The silicone rubber in the runner is cooled by the setting of the clamp. After that, a groove with the same shape as the clamp block is formed. As the cylinder shrinks, the groove is limited by the clamp block and rises with the runner. When the cylinder shrinks to the highest point when the male and female molds are separated, the upper ejector passively contacts the driving component in the through hole, causing the clamp block to shrink and leave the runner. The waste material is separated from the runner by gravity due to the shrinkage of the clamp block, and is blown away from the mold through the jet component, thereby eliminating the time required for ejection during material removal and the time required for the robot to clamp and separate the waste material, thereby improving the production efficiency of the silicone rubber protective cover.

[0008] Preferably, the driving assembly also includes an upper push rod, a lower push rod, a locking piece and a driving guide rail, the upper push rod is arranged in a through hole on the male mold, the lower push rod is arranged on the female mold, the upper push rod, the lower push rod and the through hole are all located on the same central axis, a driving guide rail and a driving shaft are also provided on the inner wall of the through hole, the driving guide rail includes a driving rack and a return spring, the driving rack is slidably installed in the driving guide rail, the two ends of the return spring are respectively connected to the driving guide rail and the driving rack, the driving shaft is rotatably installed on the inner wall of the through hole, the upper and lower ends of the driving shaft are provided with toothed structures meshing with the driving rack, and the driving shaft is connected to the clamping block through a locking piece.

[0009] It is easy to understand that by arranging a driving guide rail in the through hole, the driving rack is pushed by the return spring and is located at the uppermost end of the driving guide rail. When the cylinder contracts, the upper push rod enters the through hole to drive the driving rack to move downward, thereby causing the driving shaft to rotate. The rotation of the driving shaft can drive the locking member to release the self-locking, so that the power of the driving shaft is transmitted to the clamping block, the clamping block is contracted, and the lock of the waste in the runner is released. The driving assembly drives the clamping block through the power of the injection molding machine's moving cylinder, thereby reducing the setting of external power, which can effectively reduce The manufacturing cost of the mold is reduced, and the setting of the locking piece can increase the displacement distance of the clamp by setting the gear transmission ratio, thereby ensuring that the clamp can be completely retracted into the connecting hole, so that the waste can be separated from the runner without hindrance; at the same time, after the waste is removed, the cylinder is started again, the male mold and the female mold are closed, the lower ejector rod enters the through hole, and resets the drive rack together with the reset spring, so that the clamp is re-extended into the runner, thereby eliminating the time required for the ejection during material removal and the time required for the manipulator to clamp and separate the waste, thereby improving the production efficiency of the silicone rubber protective cover molding mold.

[0010] Preferably, the jet component includes a chamber opened inside the male mold, and a plurality of exhaust holes are provided on the lower end surface of the male mold on one side of the through hole. The exhaust holes are arranged obliquely toward the central axis of the through hole, and the exhaust holes and the through hole are both connected to the chamber. A rotating wheel is rotatably installed in the chamber, and the rotating wheel is connected to the worm gear.

[0011] It is easy to understand that by connecting the rotary wheel with the worm gear, the driving assembly drives the rotary wheel to rotate while driving the worm gear to rotate. The gas is caused to flow along the through hole to the chamber through the action of the rotary wheel, and then discharged along the exhaust hole. The exhaust hole is arranged on the side of the through hole on the lower end face of the male mold and inclined toward the central axis of the through hole. This can form an airflow that blows the waste material away from the vertical projection surface of the male mold, thereby avoiding the waste material from being retained in the vertical projection surface of the male mold, thereby affecting the molding of the silicone rubber protective cover next time.

[0012] Preferably, the locking member includes a worm thread, a worm wheel and an attached rack, the worm thread is arranged on the drive shaft, the attached rack is arranged on one side of the clamping block, the turbine is installed on the inner wall of the through hole close to the runner direction, and the front and rear sides of the worm wheel are respectively engaged with the worm thread and the attached rack.

[0013] It is easy to understand that in order to prevent the clamp from being passively retracted into the connecting hole due to the increase in pressure in the runner during injection molding, causing the clamp to be unable to clamp the molded waste, the transmission process is made smooth through the cooperation of the worm wheel and the worm thread. Since the worm thread is a continuous spiral tooth, it is continuous during the process of meshing with the worm wheel, and because of the small lead angle, the worm wheel can only be driven by the rotation of the drive shaft, and the drive shaft cannot be rotated due to the rotation of the worm wheel, thereby realizing the expansion and contraction of the clamp and forming a stepless locking at the same time, so that no matter how great the pressure of the runner toward the connecting hole is, the clamp cannot retract, thereby ensuring the stability of the clamp in clamping the waste.

[0014] Preferably, the runner is also provided with a curved surface for cooperating with the discharge of waste materials, and the inner diameter of the runner gradually increases along the direction of the cylinder toward the direction of the auxiliary flow channel.

[0015] It is easy to understand that in order to prevent the waste material from continuously rubbing against the runner on its outer cylindrical surface during its separation from the runner, causing the waste material to slide out of the runner unsmoothly, the inner diameter of the runner gradually increases as it extends from the top toward the mother mold through the transition of the arc surface, so that the waste material at the runner port is separated due to the contraction of the clamp block and the gravity. The waste material at the rear end of the runner has a smaller inner diameter than the waste material at the runner port, so that the entire waste material can be smoothly separated from the runner. Except for the waste material at the runner port, the remaining waste material will not rub against the inner wall of the runner, thereby avoiding the waste material from being blocked by friction and being retained in the runner, thereby ensuring the smoothness of the waste material when it separates from the runner.

[0016] Preferably, the male mold is also provided with an ejector rod penetrating the runner, and an upper ejector rod and the ejector rod are located on the same central axis.

[0017] It is easy to understand that in order to avoid some depressions or scratches on the inner wall of the runner due to long-term use of the runner, and the waste will produce flash due to the depressions or scratches, the flash is in the depressions or scratches so that the gravity is not enough to separate the waste from the runner, as the upper ejector rod enters the through hole, the driving rack moves downward along the driving guide rail, and the clamping block begins to shrink while the ejector rod is squeezed by the upper ejector rod, and then moves from the lower end along the upper end of the runner, thereby squeezing out the waste stuck in the runner, thereby ensuring the material removal efficiency of the silicone rubber protective cover molding mold.

[0018] Preferably, the connecting hole is a cone with a diameter gradually decreasing toward the inner wall of the runner, the clamping block is provided with a slope, the diameter of the slope gradually decreases away from the connecting hole, and one end of the clamping block provided with the slope extends into the runner.

[0019] It is easy to understand that in order to reduce the wear of the clamp during the expansion and contraction process, the connecting hole is set to a cone with a gradually decreasing diameter along the inner wall of the runner, thereby reducing the sharpness of the contact edges of the two. When the connecting hole is slightly enlarged due to wear, the clamp located in the connecting hole gradually expands its outer diameter toward the through hole due to the setting of the inclined surface, thereby ensuring that the aperture of the front section of the connecting hole is not larger than the diameter of the rear section of the inclined surface on the clamp, thereby avoiding the reduction of the sealing of the flow channel due to friction, thereby ensuring the sealing of the runner and extending the service life of the mold; at the same time, the inclined surface design on the clamp can disperse the stress of the waste after molding, avoid stress concentration at sharp edges, thereby reducing the risk of waste breakage in the middle, and during the injection molding process, the inclined surface helps the molten silicone rubber to flow more smoothly, thereby reducing bubbles and defects, thereby ensuring that the waste can be completely separated from the runner.

[0020] Preferably, a rubber block is also provided in the connecting hole, and the rubber block is connected to the inner wall of the through hole through a pressure spring. A rotating plate is also rotatably connected in the through hole, and protrusions are also provided at the upper and lower ends of the clamping block located at the attached rack, and the upper and lower ends of the rotating plate are respectively in contact with the protrusions and the pressure spring.

[0021] It is easy to understand that in order to prevent the waste from generating flash due to the gap between the connecting hole and the clamp block, causing the waste to be stuck in the runner, when the upper push rod contacts the driving assembly to make the clamp block shrink into the connecting hole, the clamp block contacts the rotating plate during the retreat process, and the rotating plate pushes the pressure spring forward so that the rubber block and the clamp block move in opposite directions. As the clamp block shrinks, the rubber block is squeezed toward the runner direction, so that the flash cannot enter the gap with the clamp block, thereby avoiding the waste from being stuck in the runner due to the flash, thereby ensuring the material removal efficiency of the silicone rubber protective cover molding mold.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention provides a driving assembly and an air jet component. When the cylinder contracts to the highest point when the male and female molds are separated, the upper ejector rod passively contacts the driving assembly in the through hole, causing the clamp to contract and leave the runner. The waste material is separated from the runner by gravity due to the contraction of the clamp block, and is blown away from the mold by the air jet component, thereby eliminating the time required for the ejection during demoulding and the time required for the manipulator to clamp and separate the waste material, thereby improving the production efficiency of the silicone rubber protective cover.

[0024] 2. The present invention provides a locking piece, and through the cooperation of the worm wheel and the worm screw thread in the locking piece, a stepless locking is formed while realizing transmission, and while realizing the extension and retraction of the clamp block, it avoids the clamp block from passively shrinking into the connecting hole due to the increase of the pressure in the runner during injection molding, causing the clamp block to be unable to clamp the waste after molding, thereby ensuring the clamping function of the clamp block.

[0025] 3. The present invention arranges a rubber block in the connecting hole. When the upper push rod contacts the driving assembly, the clamping block shrinks into the connecting hole. During the retreat of the clamping block, the clamping block contacts the rotating plate. The rotating plate pushes the pressure spring forward so that the movement directions of the rubber block and the clamping block are opposite. As the clamping block shrinks, the rubber block is squeezed toward the runner, thereby preventing the waste from being stuck in the runner due to the gap between the connecting hole and the clamping block, thereby ensuring the smoothness of the waste when leaving the runner.

[0026] 4. The present invention sets an arc surface in the runner. Through the transition of the arc surface, the inner diameter of the runner gradually increases during the process of extending from the uppermost end toward the mother mold, so that after the waste material at the runner port is detached due to the contraction of the clamping block and the gravity, the waste material at the rear end of the runner has a smaller inner diameter than the waste material at the runner port, so that the entire waste material can be smoothly detached from the runner. Except for the waste material at the runner port, the remaining waste material will not rub against the inner wall of the runner, thereby avoiding the detachment of the waste material being hindered by friction, thereby ensuring the smoothness of the waste material when detaching from the runner. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the silicone rubber protective cover molding mold of the present invention located on an injection molding machine;

[0028] Figure 2 It is a structural schematic diagram of the public mold;

[0029] Figure 3 Schematic diagram of the structure of the master mold;

[0030] Figure 4 An outline drawing of the waste;

[0031] Figure 5 for Figure 2 Full cross-section at the middle AA;

[0032] Figure 6 It is a schematic diagram of the state where the upper push rod enters the through hole when the cylinder is retracted;

[0033] Figure 7 This is a schematic diagram of the state after the cylinder is fully retracted and the waste in the runner is completely separated;

[0034] Figure 8 It is a schematic diagram of the state where the lower ejector pin abuts against the driving rack during mold closing;

[0035] Fig. 9 for Figure 8 The enlarged view of point B in the middle;

[0036] Fig.10 This is a schematic diagram of the structural state of the rubber block being squeezed toward the runner due to the contraction of the clamping block.

[0037] In the figure: 1. two-color injection mold; 101. molding frame; 1011. ejector rod; 102. turret; 1021. cooling pipe; 103. cylinder; 104. male mold; 105. female mold; 106. runner; 1061. arc surface; 107. auxiliary flow channel; 108. through hole; 109. connecting hole; 2. drive assembly; 201. clamping block; 2011. inclined surface; 202. upper ejector rod; 203 , lower push rod; 204, driving guide rail; 205, driving rack; 206, reset spring; 207, driving shaft; 2071, toothed structure; 3, locking piece; 301, worm thread; 302, attached rack; 303, worm wheel; 4, jet piece; 401, chamber; 402, exhaust hole; 403, rotating wheel; 5, rubber block; 501, pressure spring; 502, rotating plate; 5021, protrusion. DETAILED DESCRIPTION

[0038] The present invention provides a silicone rubber protective cover forming mold, and the technical solution is as follows:

[0039] See also Figures 1 to 10 A silicone rubber protective cover molding mold includes a two-color injection mold 1 and a turret 102. The cross end of the turret 102 is provided with a cooling pipe 1021 for molding the silicone rubber protective cover. The two-color injection mold 1 is arranged on the left and right sides of the turret 102. The two-color injection mold 1 is installed on a vertical turret injection molding machine. The vertical turret injection molding machine is also provided with a cylinder 103 and a molding frame 101. The molding frame 101 is arranged outside the turret 102 and the two-color injection mold 1. The cylinder 103 is arranged on the molding frame 101 and is connected to the two-color injection mold 1. Specifically, the two-color injection mold 1 includes a male mold 104 and a female mold 105. A runner 106 for injection is arranged on On the male mold 104, an auxiliary runner 107 for assisting injection is arranged on the female mold 105, and the runner 106 and the auxiliary runner 107 are fitted together as the male mold 104 and the female mold 105 are closed. A through hole 108 is opened through the male mold 104 and the female mold 105, and a driving component 2, an injection component 4 and a connecting hole 109 are arranged in the through hole 108. The runner 106 is connected with the connecting hole 109, and a clamping block 201 is also provided on the driving component 2. The driving component 2 drives the clamping block 201 through the connecting hole 109 through the moving power of the male mold 104 to extend into the runner 106, and the injection component 4 generates an airflow outside the through hole 108 by rotating.

[0040] See also Figures 1 to 10The driving assembly 2 further includes an upper ejector rod 202, a lower ejector rod 203, a locking member 3 and a driving guide rail 204. The upper ejector rod 202 is arranged in the through hole 108 on the male mold 104, and the lower ejector rod 203 is arranged on the female mold 105. The upper ejector rod 202, the lower ejector rod 203 and the through hole 108 are all located on the same central axis. The driving guide rail 204 and the driving shaft 207 are arranged on the inner wall of the through hole 108. The driving guide rail 204 includes a driving rack 205 and a reset spring 206. The driving rack 205 is slidably installed in the driving guide rail 204. The two ends of the return spring 206 are connected to the driving guide rail 204 and the driving rack 205 respectively. A rotatable driving shaft 207 is installed on the inner wall of the through hole 108. The upper and lower ends of the driving shaft 207 are provided with tooth structures 2071 that mesh with the driving rack 205. The driving rack 205 meshes with the driving shaft 207. The driving shaft 207 is connected to the clamping block 201 by meshing with the locking member 3. The locking member 3 includes a worm thread 301, a worm wheel 303 and an attached rack 302. The middle section of the driving shaft 207 is provided with a worm thread 30 1, the attached rack 302 is arranged on the side of the clamping block 201 close to the worm wheel 303, and the front and rear sides of the worm wheel 303 are respectively meshed with the worm screw thread 301 and the attached rack 302. The molding frame 101 is also provided with an ejector rod 1011 penetrating the runner 106, and the runner 106 is also provided with an arc surface 1061 for waste discharge. The runner 106 gradually increases its inner diameter along the direction of the cylinder 103 toward the direction of the auxiliary flow channel 107, and the connecting hole 109 is a conical shape facing the inner wall of the runner 106 and gradually reducing its diameter. There is an inclined surface 2011, and the diameter of the inclined surface 2011 gradually decreases away from the connecting hole 109. One end of the clamping block 201 provided with the inclined surface 2011 extends into the runner 106. The rubber block 5 is arranged around the connecting hole 109 and is connected to the inner wall of the through hole 108 through the pressure spring 501. The rotating plate 502 is rotatably installed in the through hole 108. The clamping block 201 is located at the upper and lower ends of the attached rack 302 and is also provided with protrusions 5021. The upper and lower ends of the rotating plate 502 are respectively in contact with the protrusion 5021 and the pressure spring 501.

[0041] See also Figures 5 to 8 The jet component 4 includes a chamber 401 opened inside the male mold 104. The lower end surface of the male mold 104 is located on one side of the through hole 108 and is provided with a plurality of exhaust holes 402. The exhaust holes 402 are arranged obliquely toward the central axis direction of the through hole 108. The exhaust holes 402 and the through hole 108 are both connected to the chamber 401. A rotating wheel 403 is rotatably installed in the chamber 401. The rotating wheel 403 is fixedly connected to the worm gear 303 through a threaded optical axis.

[0042] See also Figures 1 to 10The cylinder 103 of the injection molding machine controls the up and down movement of the male mold 104 to realize the mold separation and mold closing with the female mold 105. In this process, the cooling pipe 1021 enters the two-color injection mold 1 on both sides through the rotation of the turret 102 to perform injection molding of the silicone rubber protective cover. The molten silicone rubber flows into the auxiliary flow channel 107 on the female mold 105 through the runner 106 on the male mold 104, so that the cavity between the cooling pipe 1021 and the male mold 104 and the female mold 105 is filled with molten silicone rubber. After the molten silicone rubber is cooled, it becomes a two-color handle cover. The silicone rubber remaining in the auxiliary flow channel 107 and the runner 106 is waste. The silicone rubber in the runner 106 forms a groove with the same shape as the clamping block 201 after cooling. As the cylinder 103 contracts, the groove is limited by the clamping block 201 and rises together with the runner 106. When the male mold 104 and the female mold 105 are separated, the cylinder 103 contracts to the highest point. By arranging a driving guide rail 204 in the through hole 108, the driving rack 205 is pushed by the return spring 206 and is located at the uppermost end of the driving guide rail 204. When the cylinder 103 contracts, the upper ejector rod 202 enters the through hole 108 to drive the driving rack 205 to move downward, thereby rotating the driving shaft 207. The rotation of the driving shaft 207 can drive the locking member 3 to release the self-locking. The cooperation between the worm wheel 303 and the worm thread 301 makes the transmission process smooth. Since the worm thread 301 is a continuous spiral tooth, when it is in contact with the worm wheel 3 03 meshing process is continuous, and because of the small lead angle, the worm wheel 303 can only be driven to rotate by the rotation of the drive shaft 207, and the drive shaft 207 cannot be rotated because of the rotation of the worm wheel 303, thereby realizing the expansion and contraction of the clamping block 201 and forming a stepless locking, so that no matter how great the pressure of the runner 106 toward the connecting hole 109 is, the clamping block 201 cannot be retracted, and at the same time, the power of the drive shaft 207 is transmitted to the clamping block 201, so that the clamping block 201 is contracted, thereby releasing the lock on the waste in the runner 106, and the drive assembly 2 drives the clamping block 201 through the cylinder 103, thereby reducing the setting of the external power, thereby effectively reducing the manufacturing cost of the mold, and the setting of the locking member 3 can be achieved by setting the gear The gear ratio is increased to increase the displacement distance of the clamp block 201, thereby ensuring that the clamp block 201 can be completely retracted into the connecting hole 109, so that the waste can be separated from the runner 106 without hindrance. The waste is separated from the runner 106 by gravity due to the contraction of the clamp block 201. By connecting the runner 403 with the worm gear 303, the driving component 2 drives the runner 403 to rotate while driving the worm gear 303 to rotate. The gas flows along the through hole 108 to the chamber 401 through the action of the runner 403, and then is discharged along the exhaust hole 402. The exhaust hole 402 is arranged on the lower end surface of the male mold 104 and is located on one side of the through hole 108, and can form an airflow that blows the waste away from the vertical projection surface of the male mold 104.This prevents waste from being retained in the vertical projection plane of the male mold 104 and affecting the next molding of the silicone rubber protective cover; at the same time, after the waste is removed, the cylinder 103 is started again, the male mold 104 and the female mold 105 are molded together, the lower ejector 203 enters the through hole 108, and resets the drive rack 205 together with the reset spring 206, so that the clamping block 201 re-extends into the runner 106, thereby eliminating the time required for the ejection during material removal and the time required for the manipulator to clamp and separate the waste, thereby improving the production efficiency of the silicone rubber protective cover molding mold.

[0043] When the waste material is stuck in the runner 106, the inner diameter of the runner 106 gradually increases during the process of extending from the uppermost end toward the mother mold 105 through the transition of the cambered surface 1061, so that the waste material at the end of the runner 106 is separated due to the contraction of the clamping block 201 and the gravity. The waste material at the rear end of the runner 106 has a smaller inner diameter than the waste material at the end of the runner 106, so that the whole waste material can be smoothly separated from the runner 106. Except for the waste material at the end of the runner 106, the remaining waste material will not rub against the inner wall of the runner 106, thereby avoiding the detachment of the waste material due to friction. 6 is used for a long time, so that some depressions or scratches appear on the inner wall of the runner 106, and the waste will produce flash due to the depressions or scratches. Because the flash is in the depressions or scratches, gravity is not enough to separate the waste from the runner 106. As the upper ejector rod 202 enters the through hole 108, the driving rack 205 moves downward along the driving guide rail 204. When the clamping block 201 begins to shrink, the ejector rod 1011 is squeezed by the upper ejector rod 202, and then moves from the lower end along the upper end of the runner 106, thereby squeezing out the waste stuck in the runner 106, thereby ensuring the material removal efficiency of the silicone rubber protective cover molding mold.

[0044] In order to reduce the wear of the clamping block 201 during the expansion and contraction process, which may cause the waste to produce flash and get stuck in the runner 106, the connecting hole 109 is set to a cone with a gradually decreasing diameter along the inner wall of the runner 106 to reduce the sharpness of the contact edges between the two. When the connecting hole 109 is slightly enlarged due to wear, the outer diameter of the clamping block 201 located in the connecting hole 109 is gradually enlarged toward the through hole due to the setting of the inclined surface 2011, thereby ensuring that the aperture of the front section of the connecting hole 109 is not larger than the diameter of the rear section of the inclined surface 2011 on the clamping block 201, thereby avoiding the reduction of the sealing performance of the runner 106 due to friction, ensuring the sealing performance in the runner 106, and thus extending the service life of the mold; at the same time, the inclined surface 2011 on the clamping block 201 The design 11 can disperse the stress of the waste material after molding, avoid stress concentration at sharp edges, and thus reduce the risk of waste material breaking midway. In the process of injection molding, the inclined surface 2011 helps the molten silicone rubber to flow more smoothly, thereby reducing bubbles and defects, thereby ensuring that the waste material can be completely separated from the runner 106. When the upper ejector rod 202 contacts the drive assembly 2 to shrink the clamping block 201 into the connecting hole 109, the clamping block 201 contacts the rotating plate 502 during the retreat process. The rotating plate 502 pushes the pressure spring 501 forward so that the rubber block 5 moves in the opposite direction to the clamping block 201. As the clamping block 201 shrinks, the rubber block 5 is squeezed toward the runner 106, so that the flash cannot enter the gap with the clamping block 201, thereby avoiding the waste material being stuck in the runner 106 due to the flash, thereby ensuring the material removal efficiency of the silicone rubber protective cover molding mold.

[0045] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A silicone rubber protective cover molding die, comprising a turret (102) and a two-color injection mold (1), wherein a cooling pipe (1021) for molding a handle cover is provided at the cross end of the turret (102), and the two-color injection mold (1) is provided on the left and right sides of the turret (102), characterized in that: The two-color injection mold (1) comprises a male mold (104) and a female mold (105), the male mold (104) is provided with a runner (106) for injecting material, the female mold (105) is provided with an auxiliary flow channel (107) for assisting injection, the runner (106) is fitted with the auxiliary flow channel (107), the male mold (104) and the female mold (105) are provided with a through hole (108), and the through hole (108) is provided with A driving component (2), an air jet component (4) and a connecting hole (109), wherein the connecting hole (109) is connected to the runner (106), and a clamping block (201) is further provided on the driving component (2). The driving component (2) drives the clamping block (201) from the connecting hole (109) into the runner (106) through the moving power of the male mold (104), and the air jet component (4) generates an airflow outside the through hole (108) by rotating.

2. A silicone rubber protective cover forming mold according to claim 1, characterized in that: The driving assembly (2) further comprises an upper ejector rod (202), a lower ejector rod (203), a locking member (3) and a driving guide rail (204); the upper ejector rod (202) is arranged in a through hole (108) on the male mold (104); the lower ejector rod (203) is arranged on the female mold (105); the upper ejector rod (202), the lower ejector rod (203) and the through hole (108) are all located on the same central axis; the driving guide rail (204) and a driving shaft (207) are also arranged on the inner wall of the through hole (108); the driving guide rail (204) comprises a driving rack (205) and a return spring (206), the driving rack (205) is slidably installed in the driving guide rail (204), the two ends of the return spring (206) are respectively connected to the driving guide rail (204) and the driving rack (205), the driving shaft (207) is rotatably installed on the inner wall of the through hole (108), the upper and lower ends of the driving shaft (207) are provided with tooth structures (2071) meshing with the driving rack (205), and the driving shaft (207) is connected to the clamping block (201) through a locking member (3).

3. A silicone rubber protective cover forming mold according to claim 2, characterized in that: The locking member (3) comprises a worm screw thread (301), a worm wheel (303) and an attached rack (302); the drive shaft (207) is provided with a worm screw thread (301); the attached rack (302) is provided on one side of the clamping block (201); the turbine (303) is installed on the inner wall of the through hole (108) close to the pouring channel (106); the front and rear sides of the worm wheel (303) are respectively meshed with the worm screw thread (301) and the attached rack (302).

4. A silicone rubber protective cover forming mold according to claim 3, characterized in that: The jet component (4) comprises a chamber (401) opened inside the male mold (104); a plurality of exhaust holes (402) are provided on the lower end surface of the male mold (104) located on one side of the through hole (108); the exhaust holes (402) are arranged obliquely toward the central axis of the through hole (108); the exhaust holes (402) and the through hole (108) are both connected to the chamber (401); a rotating wheel (403) is rotatably installed in the chamber (401); and the rotating wheel (403) is connected to the worm gear (303).

5. The silicone rubber protective cover molding die according to claim 1, characterized in that: The runner (106) is also provided with a curved surface (1061) for waste discharge, and the inner diameter of the runner (106) gradually increases along the direction of the cylinder (103) toward the auxiliary flow channel (107).

6. The silicone rubber protective cover forming mold according to claim 5, characterized in that: The molding frame (101) is also provided with an ejector rod (1011) that passes through the pouring channel (106), and an upper ejector rod (202) and the ejector rod (1011) are located on the same central axis.

7. The silicone rubber protective cover molding die according to claim 1, characterized in that: The connecting hole (109) is in the shape of a cone whose diameter gradually decreases toward the inner wall of the runner (106); the clamping block (201) is provided with an inclined surface (2011); the diameter of the inclined surface (2011) gradually decreases away from the connecting hole (109); and one end of the clamping block (201) provided with the inclined surface (2011) extends into the runner (106).

8. The silicone rubber protective cover forming mold according to claim 7, characterized in that: A rubber block (5) is also provided in the connection hole (109), and the rubber block (5) is connected to the inner wall of the through hole (108) via a pressure spring (501). A rotating plate (502) is also rotatably connected in the through hole (108). The clamping block (201) is also provided with protrusions (5021) at the upper and lower ends of the attached rack (302), and the upper and lower ends of the rotating plate (502) are respectively in contact with the protrusions (5021) and the pressure spring (501).

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