A silicone molding machine and a molding method

Abstract

The present invention relates to the technical field of silicone compression molding, and specifically discloses a silicone molding machine and a molding method, including: a frame body, a workbench, a lifting assembly, an upper mold, a lower mold and a mold core. The workbench is arranged on the frame body, the lower mold is arranged on the workbench, the upper mold is arranged on the frame body through the lifting assembly, the lifting assembly is used to drive the upper mold to move up and down, the mold core is arranged on the lower mold, a cavity is arranged on the mold core, an ejector plate is arranged on the lower mold, the ejector plate can extend into the cavity of the mold core, the upper mold can abut against the top end of the mold core, and a flash removal assembly is arranged in the mold core. The flash removal assembly includes a driving mechanism, a movable plate and an adsorption block. A plurality of adsorption holes are arranged on the mold core, and the plurality of adsorption holes are all spaced along the circumferential side of the cavity. An adsorption block is slidably fitted in each adsorption hole, the movable plate is slidably fitted in the mold core, and each adsorption block is connected to the movable plate; the silicone molding machine and the molding method of the present invention can realize automatic flash removal.

Description

Technical Field

[0001] The invention relates to the technical field of silicone die pressing, and in particular to a silicone molding machine and a molding method. Background Art

[0002] The new energy battery silicone protective pad is an important component used in new energy batteries. Its main functions are thermal conductivity and heat dissipation, insulation protection, buffering and shock absorption, and sealing and moisture-proofing of the battery.

[0003] During production, it is necessary to make a mold according to the design size and shape of the new energy battery silicone protective pad. The mixed solid material is placed into the mold cavity according to the calculated weight. The mold is closed by a hydraulic press and other equipment, and a certain pressure is applied to fill the mold cavity with silicone material. The silicone material in the mold is heated to soften and cooled to shape, so as to realize the molding of the silicone protective pad.

[0004] A Chinese patent document with authorization announcement number CN118386460B discloses a thermally conductive silicone molding machine that is convenient for loading and unloading. The molding machine includes a base, a support plate, an electric push rod, a feeding mechanism, a lifting and lowering molding mechanism, a locking mechanism, a supporting mechanism and a demoulding mechanism. The base is fixedly connected to a support plate, and an electric push rod is fixedly connected to the upper part of the base. The base is provided with a feeding mechanism, which is used to place the thermally conductive silicone raw material. The telescopic rod of the electric push rod is provided with a lifting and lowering molding mechanism, which is used to mold the thermally conductive silicone sheet. The lifting and lowering molding mechanism is provided with a locking mechanism, which is used to limit the lifting and lowering molding mechanism. The lifting and lowering molding mechanism is provided with a supporting mechanism, which is used to support the thermally conductive silicone sheet after molding. The demoulding mechanism is provided on the lifting and lowering molding mechanism, and the demoulding mechanism includes a fixed guide frame, a rotating rod, an overrunning clutch, a rotating gear, a torsion spring, a movable slot rod, a demoulding rod and a fixed rack, and the demoulding mechanism is used to demould the thermally conductive silicone sheet.

[0005] The above-mentioned die-casting machine drives the demoulding rod to move toward the die plate by moving the slot rod, so that the two moving slot rods push the thermally conductive silicone sheet on the die plate, and then the thermally conductive silicone sheet on the die plate can be demoulded more conveniently. When the bracket moves upward, it will drive the extension rod and the toggle ball plate to move upward, and the slotted pull rod drives the movable support sheet to swing toward the bottom of the die plate. After the demoulding rod pushes the thermally conductive silicone sheet on the die plate to demould, the thermally conductive silicone sheet falls between the four movable support sheets, so that the four movable support sheets support the thermally conductive silicone sheet, which makes it easier to take out the thermally conductive silicone sheet. However, during the molding process, since the die-casting mechanism needs to extrude the silicone raw material, part of the silicone raw material is squeezed out of the mold cavity during the molding process, thereby forming a circle of flash around the workpiece. After the workpiece is taken out, the flash needs to be cut off. Summary of the invention

[0006] The present invention provides a silicone molding machine and a molding method, aiming to solve the problem of flash existing on the peripheral side of the workpiece after molding in the related art.

[0007] The silicone molding machine of the present invention includes: a frame body, a workbench, a lifting assembly, an upper mold, a lower mold, and a mold core;

[0008] The workbench is arranged on the frame body, the lower mold is arranged on the workbench, the upper mold is arranged on the frame body through the lifting assembly, the lifting assembly is used to drive the upper mold to move up and down, the mold core is arranged on the lower mold, a cavity is arranged on the mold core, an ejector plate is arranged on the lower mold, the ejector plate can extend into the cavity of the mold core, and the upper mold can abut against the top end of the mold core;

[0009] A flash removing assembly is arranged in the mold core. The flash removing assembly includes a driving mechanism, a movable plate, and an adsorption block. A plurality of adsorption holes are arranged on the mold core, and the plurality of adsorption holes are all distributed at intervals along the periphery of the cavity. A corresponding adsorption block is slidably fitted in each adsorption hole. The movable plate is slidably fitted in the mold core, and each adsorption block is connected to the movable plate. The driving mechanism is used to drive the movable plate to move up and down, thereby driving the adsorption block to move in the adsorption hole.

[0010] Beneficial effects: Put the solid silicone raw material into the cavity, and then the lifting assembly drives the upper mold to move downward until it abuts against the mold core, so as to realize mold closing. Heat the mold core to melt the solid silicone raw material in the cavity. After the raw material is completely melted, stop heating and cool and solidify the melted silicone raw material to form a finished silicone product. During the molding process, part of the silicone raw material will cool between the upper mold and the mold core to form flash. The flash can cover the adsorption holes. After molding is completed, the lifting assembly drives the upper mold to move upward to realize mold opening. At the same time, the driving mechanism drives the movable plate to move downward, and the adsorption block moves downward synchronously, so as to form a negative pressure chamber in the adsorption hole and tightly adsorb the flash. At the same time, the ejector plate moves upward to push the finished silicone product out of the cavity and tear the flash from the periphery of the finished silicone product to realize automatic flash removal.

[0011] Preferably, the driving mechanism includes a turbine, a first gear, and a first driving rod. The turbine is rotatably fitted in the mold core. Liquid through holes are respectively provided on both sides of the mold core. The liquid through holes are used to introduce a liquid medium into the mold core. The flow of the liquid medium in the mold core can drive the turbine to rotate. The turbine can drive the first gear to rotate. The first driving rod is slidably fitted in the mold core and is elastically connected to the mold core through a first elastic member. The first gear meshes with the first driving rod. A first wedge block is provided on the first driving rod. The movable plate is connected to the mold core through a second elastic member. A second wedge block is provided on the movable plate. The first wedge block can abut against the second wedge block, thereby pushing the movable plate to move downward.

[0012] Preferably, a first vibration mechanism is provided between the turbine and the first gear. The first vibration mechanism includes a vibration outer ring, a vibration inner ring, and a vibration block. The vibration outer ring is connected to the first gear through a connecting rod. The vibration inner ring is connected to the turbine. A regular polygon inner hole is provided on the vibration outer ring. The vibration inner ring is located within the regular polygon inner hole. The vibration block is connected to the vibration inner ring through a third elastic member. The vibration block abuts against the inner wall of the regular polygon inner hole and can slide along the inner wall of the regular polygon inner hole.

[0013] The effect is that when the first driving rod moves to the limit, the first driving rod remains stationary and restricts the rotation of the first gear, thereby restricting the rotation of the vibration outer ring. When the turbine continues to rotate, the vibration inner ring rotates relative to the vibration outer ring. Under the action of the third elastic member, the vibration block will continuously knock on the vibration outer ring, causing the vibration outer ring to vibrate. During the cooling process of the liquid silicone raw material, the vibration of the vibration outer ring can transmit the vibration to the mold core through the first gear. The vibration of the mold core can eliminate the bubbles in the liquid silicone raw material and avoid the bubbles affecting the quality of the finished silicone product.

[0014] Preferably, a limiting mechanism is further provided in the mold core. The limiting mechanism includes a limiting plate, a limiting rod, and a fourth elastic member. The limiting plate is connected to the top surface of the mold core through the fourth elastic member. A limiting hole is provided on the upper end surface of the mold core. The bottom end of the limiting rod is connected to the limiting plate. The top end of the limiting rod passes through the limiting hole and extends upward. The limiting rod can abut against the upper mold. The limiting plate can abut against the movable plate and push the limiting plate to move downward.

[0015] The effect is that during mold closing, the upper mold pushes the limiting rod to move downward. The limiting rod drives the limiting plate to move downward. The limiting plate pushes the movable plate to move downward. The adsorption block moves downward synchronously with the movable plate until the upper end surface of the adsorption plate is flush with the upper surface of the mold core, preventing the liquid silicone raw material from entering the adsorption hole.

[0016] Preferably, a second vibration mechanism is provided inside the mold core. The second vibration mechanism includes a ratchet wheel, a paddle, a flywheel, a crank, a second driving rod, a moving frame, a swing rod, and a striking rod. The ratchet wheel is rotatably fitted on the turbine, the paddle is provided on the turbine and is in one-way engagement with the ratchet wheel, the flywheel is provided on the ratchet wheel, the second driving rod is slidably fitted inside the mold core, one end of the crank is connected to the flywheel, and the other end thereof is connected to the second driving rod. The moving frame is slidably fitted inside the mold core, the second driving rod is slidably fitted with the moving frame, the swing rod is rotatably fitted inside the adsorption block, a chute is provided on the swing rod, a slider is provided on the moving frame, and the slider is slidably fitted inside the chute. The striking rod is provided at the top end of the swing rod, and the striking rod can abut against the inner wall of the adsorption block.

[0017] The effect is that after the flash on the periphery of the finished silicone product is torn off, the turbine rotates in reverse, the movable plate moves upward under the action of the second elastic member, the adsorption block moves upward synchronously and extends out of the adsorption hole, and the adsorption block can push the flash upward, so that the flash is separated from contact with the mold core. The turbine drives the ratchet wheel to rotate through the dial plate, the flywheel rotates synchronously with the ratchet wheel, and drives the second driving rod to reciprocate through the crank. The second driving rod drives the moving frame to reciprocate, the moving frame drives the swing rod to swing, and the striking rod continuously strikes the adsorption block, so that the adsorption block generates vibration and prevents the flash from adhering to the adsorption block.

[0018] Preferably, a moving mechanism is provided on the workbench. The moving mechanism includes a guide rail, a driving motor, and a lead screw. The driving motor is provided on the workbench, the lead screw is connected to the output end of the driving motor, the two guide rails are spaced apart and distributed on the workbench, the lower mold is slidably fitted with the guide rail, the lower mold is in threaded engagement with the lead screw, and the lower mold can move along the guide rail.

[0019] The effect is that the moving mechanism can drive the lower mold and the mold core out of the workbench, so as to facilitate the loading and unloading of workers.

[0020] Preferably, the lifting assembly includes a fixed seat and a hydraulic cylinder. The fixed seat is provided on the frame body, the hydraulic cylinder is provided on the fixed seat, and the output end of the hydraulic cylinder is connected to the upper mold.

[0021] A silicone molding method, applied to the silicone molding machine described above, includes the following steps:

[0022] The first step is to place the material. Put the solid silicone raw material into the cavity, and the lifting mechanism drives the upper mold to move downward until the upper mold fits with the mold core to complete the mold closing.

[0023] Step 2: Shaping. Inject liquid heat medium into the mold core. The liquid heat medium melts the solid silicone raw material. Then, the liquid heat medium is discharged, and liquid cold medium is injected into the mold core to cool and solidify the silicone raw material.

[0024] Step 3: Discharging. After the mold is opened, the liquid cold medium flows in the mold core and drives the turbine to rotate forward. The turbine drives the first gear to rotate. The first gear meshes with the first driving rod and drives the movable block to move downward through the first driving rod. The adsorption block moves downward synchronously, forming a negative pressure cavity in the adsorption hole, thereby tightly adsorbing the flash on the periphery of the finished workpiece. The ejector plate moves upward, pushing the finished workpiece upward, and tearing off the flash from the finished workpiece while discharging.

[0025] Beneficial effects: Put the solid silicone raw material into the cavity. Then, the lifting assembly drives the upper mold to move downward until it abuts against the mold core, thus achieving mold closing. Heat the mold core to melt the solid silicone raw material in the cavity. After the raw material is completely melted, stop heating and cool and solidify the melted silicone raw material to form a finished silicone product. During the molding process, part of the silicone raw material will cool between the upper mold and the mold core, forming flash. The flash can cover the adsorption hole. After molding is completed, the lifting assembly drives the upper mold to move upward to open the mold. At the same time, the driving mechanism drives the movable plate to move downward, and the adsorption block moves downward synchronously, thereby forming a negative pressure chamber in the adsorption hole and tightly adsorbing the flash. At the same time, the ejector plate moves upward to push the finished silicone product out of the cavity and tear off the flash from the periphery of the finished silicone product, realizing automatic flash removal.

[0026] Preferably, during mold closing, the upper mold pushes the limit rod downward. The limit rod drives the movable plate to move downward through the limit plate. When the liquid heat medium flows, it drives the turbine to rotate. The turbine drives the vibration inner ring to rotate. When the first driving rod moves to the limit, it can limit the rotation of the first gear, thereby realizing the relative rotation of the vibration inner ring and the vibration outer ring. During this process, the vibration block continuously knocks on the vibration outer ring and transmits the vibration to the mold core.

[0027] Preferably, after discharging, reverse input the liquid cold medium, so that the turbine rotates in reverse. The turbine drives the ratchet and the flywheel to rotate through the paddle. The flywheel drives the second driving rod and the moving frame to reciprocate through the crank. The moving frame drives the swing rod to swing, and the knocking rod knocks on the adsorption block to make the adsorption block vibrate.

[0028] Adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0029] According to the silicone molding machine and molding method of the present invention, solid silicone raw materials are placed into the mold cavity. Subsequently, the lifting assembly drives the upper mold to move downward until it abuts against the mold core, thereby achieving mold clamping. The mold core is heated to melt the solid silicone raw materials in the mold cavity. After the raw materials are completely melted, heating is stopped, and the melted silicone raw materials are cooled and solidified to form a finished silicone product. During the molding process, some silicone raw materials will cool between the upper mold and the mold core to form flash. The flash can cover the adsorption holes. After molding is completed, the lifting assembly drives the upper mold to move upward to achieve mold opening. At the same time, the driving mechanism drives the movable plate to move downward, and the adsorption block moves downward synchronously, thereby forming a negative pressure chamber in the adsorption holes and tightly adsorbing the flash. At the same time, the ejector plate moves upward to push the finished silicone product out of the mold cavity and tear the flash from the periphery of the finished silicone product to achieve automatic flash removal. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the silicone molding machine according to an embodiment of the present invention.

[0031] Figure 2 is a bottom view of the upper mold according to an embodiment of the present invention.

[0032] Figure 3 is a top view of the lower mold according to an embodiment of the present invention.

[0033] Figure 4 is a schematic structural diagram of the mold core according to an embodiment of the present invention.

[0034] Figure 5 is a cross-sectional view of the mold core according to an embodiment of the present invention.

[0035] Figure 6 is a schematic internal structure diagram of the mold core according to an embodiment of the present invention.

[0036] Figure 7 is a schematic structural diagram of the flash removal assembly according to an embodiment of the present invention.

[0037] Figure 8 is a schematic structural diagram of the driving mechanism according to an embodiment of the present invention.

[0038] Figure 9 is a schematic diagram of the cooperation between the first driving rod and the movable plate according to an embodiment of the present invention.

[0039] Figure 10 is a top view of the first vibration mechanism according to an embodiment of the present invention.

[0040] Figure 11 is a front view of the limiting mechanism according to an embodiment of the present invention.

[0041] Figure 12 is a schematic diagram of the cooperation of the second vibration mechanism according to an embodiment of the present invention.

[0042] Figure 13 It is a cross-sectional view of the adsorption block according to an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1, frame; 2, workbench; 31, fixed seat; 32, hydraulic cylinder; 4, upper mold; 5, lower mold; 51, ejector plate; 6, mold core; 61, cavity; 62, first liquid passage hole; 63, second liquid passage hole; 71, drive mechanism; 711, turbine; 712, first gear; 713, first drive rod; 7131, first wedge block; 714, first elastic member; 72, movable plate; 721, second elastic member; 722, second wedge block; 73, adsorption block; 8, first vibration mechanism; 81, vibration outer ring; 82, vibration inner ring; 83, vibration block; 84, third elastic member; 9, limit mechanism; 91, limit plate; 92, limit rod; 93, fourth elastic member; 101, ratchet; 102, paddle; 103, flywheel; 104, crank; 105, second drive rod; 106, moving frame; 1061, slider; 107, swing rod; 108, knocking rod; 111, guide rail; 112, lead screw. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] As Figures 1 to 13 shown, the silica gel molding machine of the present invention includes: a frame 1, a workbench 2, a lifting assembly, an upper mold 4, a lower mold 5, and a mold core 6. The frame 1 is used to support each component. The workbench 2 is used to support the lower mold 5. The lifting assembly is used to drive the upper mold 4 to move up and down to realize mold closing and mold opening. The upper mold 4, the lower mold 5, and the mold core 6 are mutually attached to realize mold closing, and the upper mold 4 is separated from the mold core 6 to realize mold opening.

[0047] Specifically, as Figure 1 shown, the frame 1 is a vertical structure. The workbench 2 is fixedly arranged on the frame 1. The lifting assembly includes a fixed seat 31 and a hydraulic cylinder 32. The fixed seat 31 is fixedly arranged at the top of the frame 1. The hydraulic cylinder 32 is fixedly arranged on the fixed seat 31. The hydraulic cylinder 32 is located directly below the workbench 2.

[0048] As Figure 1As shown in the figure, a moving mechanism is provided on the workbench 2. The moving mechanism includes guide rails 111, a driving motor, and a lead screw 112. There are two guide rails 111, both of which are fixedly arranged on the workbench 2, and the two are parallel and spaced apart, and extend in the front-rear direction. The driving motor is fixedly arranged on the workbench 2, and the lead screw 112 is fixedly connected to the output end of the driving motor. The lower die 5 is slidably fitted on the guide rails 111 and can move back and forth along the guide rails 111. The bottom of the lower die 5 is in threaded fit with the lead screw 112. When the driving motor drives the lead screw 112 to rotate, the lead screw 112 can drive the lower die 5 to move back and forth.

[0049] As Figures 1 to 3 shown in the figure, the upper die 4 is fixedly arranged on the output end of the hydraulic cylinder 32. The mold core 6 is detachably arranged on the lower die 5 by bolts. A plurality of cavities 61 are arranged on the mold core 6 at intervals. A plurality of ejector plates 51 are arranged on the lower die 5. The ejector plates 51 correspond to the cavities 61. Each ejector plate 51 can extend into the corresponding cavity 61. A driving motor is arranged in the lower die 5, and the driving motor is used to drive the ejector plates 51 to move up and down.

[0050] As Figures 4 to 10As shown, the mold core 6 has a hollow structure. The first liquid through holes 62 and the second liquid through holes 63 are respectively arranged on the front and rear sides of the mold core 6. Two first liquid through holes 62 are arranged on the front side of the mold core 6, and two second liquid through holes 63 are arranged on the rear side of the mold core 6. The first liquid through holes 62 and the second liquid through holes 63 are both connected to an external oil tank through pipelines, and heat-conducting oil is contained in the external oil tank. A flash removal assembly is arranged in the mold core 6. The flash removal assembly includes a driving mechanism 71, a movable plate 72, and an adsorption block 73. A plurality of adsorption holes spaced around the cavity 61 of the mold core 6 are arranged on the circumferential side of the cavity 61 of the mold core 6. Each adsorption hole is slidably fitted with an adsorption block 73. The movable plate 72 is located in the mold core 6 and is slidably fitted with the mold core 6. The bottom surface of the movable plate 72 is elastically connected to the bottom surface of the mold core 6 through a second elastic member 721. The second elastic member 721 is a spring. The bottom end of each adsorption block 73 is fixedly connected to the movable plate 72. The driving mechanism 71 includes a turbine 711, a first gear 712, and a first driving rod 713. A rotating frame is arranged in the mold core 6. The turbine 711 is rotatably fitted on the rotating frame. The first gear 712 is located directly below the turbine 711 and is coaxially distributed with the turbine 711. The bottom end of the first gear 712 is rotatably connected to the mold core 6. The first driving rod 713 is slidably fitted in the mold core 6, and the first driving rod 713 is elastically connected to the mold core 6 through a first elastic member 714. A tooth groove is arranged on the first driving rod 713. The first gear 712 meshes with the first driving rod 713 through the tooth groove. A first wedge block 7131 is arranged on the first driving rod 713, and a second wedge block 722 is arranged on the movable plate 72. The first wedge block 7131 can abut against the second wedge block 722 and push the second wedge block 722 to move downward. A first vibration mechanism 8 is arranged between the turbine 711 and the first gear 712. The first vibration mechanism 8 includes a vibration outer ring 81, a vibration inner ring 82, and a vibration block 83. The vibration inner ring 82 is fixedly sleeved on the bottom of the turbine 711 and is fixedly connected to the turbine 711. A plurality of grooves evenly spaced in the circumferential direction are arranged on the side wall of the vibration inner ring 82. Each groove is provided with a vibration block 83. The vibration block 83 is elastically connected to the vibration inner ring 82 through a third elastic member 84. The vibration outer ring 81 is fixedly connected to the first gear 712 through a connecting rod. An inner hole is arranged on the vibration outer ring 81. The inner hole is a regular hexagon hole. The vibration outer ring 81 and the vibration inner ring 82 are at the same height. The vibration inner ring 82 is located in the inner hole of the vibration outer ring 81 and is spaced from the vibration outer ring 81. The third elastic member 84 exerts a thrust on the vibration block 83, so that the vibration block 83 always abuts against the inner wall of the vibration outer ring 81.

[0051] When heat-conducting oil is input into the mold core 6 through the first liquid passage hole 62, the heat-conducting oil flows through the mold core 6 from front to back and is discharged from the second liquid passage hole 63. During the flowing process, the heat-conducting oil pushes the turbine 711 to rotate counterclockwise. The vibration inner ring 82 rotates counterclockwise synchronously with the turbine 711, and drives the vibration outer ring 81 to rotate counterclockwise through the vibration block 83. The first gear 712 rotates counterclockwise synchronously with the vibration outer ring 81, thereby driving the first driving rod 713 to move backward. The first wedge block 7131 gradually approaches the second wedge block 722 until it contacts the second wedge block 722. Subsequently, the first wedge block 7131 pushes the second wedge block 722 to move downward, thereby causing the movable plate 72 to move downward against the elastic force of the second elastic member 721. When the first driving rod 713 moves backward to the limit, the first driving rod 713 remains stationary, thereby restricting the counterclockwise rotation of the first gear 712. At this time, the vibration outer ring 81 remains stationary, and the vibration inner ring 82 rotates counterclockwise relative to the vibration outer ring 81. During this process, the vibration block 83 can continuously knock on the vibration outer ring 81 under the action of the third elastic member 84, thereby causing the vibration outer ring 81 to vibrate. Similarly, when the turbine 711 rotates clockwise, the first gear 712 drives the first driving rod 713 to move forward. When the first driving rod 713 moves forward to the limit, the first driving rod 713 restricts the rotation of the first gear 712, and the vibration inner ring 82 rotates clockwise relative to the vibration outer ring 81. The vibration block 83 can continuously knock on the vibration outer ring 81 under the action of the third elastic member 84, thereby causing the vibration outer ring 81 to vibrate.

[0052] As Figure 4 、 Figure 5 and Figure 11 shown, a limiting mechanism 9 is further provided in the mold core 6. The limiting mechanism 9 includes a limiting plate 91, a limiting rod 92 and a fourth elastic member 93. The limiting plate 91 is located in the mold core 6 and above the movable plate 72. Its top surface is elastically connected to the top surface of the mold core 6 through the fourth elastic member 93. A limiting hole is provided on the top surface of the mold core 6. The bottom end of the limiting rod 92 is fixedly connected to the top surface of the limiting plate 91, and the top end of the limiting rod 92 passes through the limiting hole and extends upward.

[0053] During the mold closing process, the upper mold 4 moves downward and gradually approaches the mold core 6 until its bottom surface fits with the mold core 6. During this process, the upper mold 4 abuts against the limiting rod 92 and pushes the limiting rod 92 to move downward. The limiting rod 92 drives the limiting plate 91 to move downward against the elastic force of the fourth elastic member 93. The limiting plate 91 moves downward until it abuts against the movable plate 72, thereby pushing the movable plate 72 to move downward until the upper surface of the adsorption block 73 is flush with the upper surface of the mold core 6.

[0054] As Figure 7 、 Figure 8 、 Figure 12 and Figure 13As shown in the figure, a second vibration mechanism is further provided in the mold core 6. The second vibration mechanism includes a ratchet wheel 101, a paddle 102, a flywheel 103, a crank 104, a second driving rod 105, a moving frame 106, a swing rod 107 and a knocking rod 108. The ratchet wheel 101 is rotatably fitted at the top end of the turbine 711. The paddle 102 is fixedly connected to the top end of the turbine 711. The paddle 102 is located beside the ratchet wheel 101 and can be in one-way meshing with the ratchet wheel 101. The flywheel 103 is fixedly connected to the top end of the ratchet wheel 101. The second driving rod 105 is slidably fitted in the mold core 6. One end of the crank 104 is rotatably connected to the flywheel 103, and the other end thereof is rotatably connected to the second driving rod 105. When the flywheel 103 rotates, it can drive the second driving rod 105 to reciprocate in the left-right direction through the crank 104. A fitting groove extending in the up-down direction is provided on the second driving rod 105. The moving frame 106 passes through the fitting groove and is slidably fitted with the second driving rod 105. The moving frame 106 is located on the movable plate 72 and is slidably fitted with the movable plate 72. The second driving rod 105 can drive the moving frame 106 to reciprocate relative to the movable plate 72 in the left-right direction. The adsorption block 73 is of a hollow structure. The center of the swing rod 107 is rotatably connected to the inner wall of the adsorption block 73. A slider 1061 is provided on the moving frame 106. A sliding groove is provided at the bottom end of the swing rod 107. The slider 1061 is slidably fitted in the sliding groove. The knocking rod 108 is fixedly connected to the top end of the swing rod 107, and both ends thereof can abut against the inner wall of the adsorption block 73.

[0055] When heat-conducting oil is input from the second liquid passage hole 63, the heat-conducting oil flows from the back to the front in the mold core 6 and flows out from the first liquid passage hole 62. During this process, the heat-conducting oil can drive the turbine 711 to rotate clockwise. The paddle 102 rotates clockwise synchronously with the turbine 711. The paddle 102 abuts against the ratchet wheel 101 and pushes the ratchet wheel 101 to rotate clockwise. The flywheel 103 rotates clockwise synchronously with the ratchet wheel 101, thereby driving the first driving rod 713 to reciprocate in the left-right direction. The first driving rod 713 drives the moving frame 106 to reciprocate in the left-right direction. The moving frame 106 drives the swing rod 107 to swing through the slider 1061. The knocking rod 108 swings synchronously with the swing rod 107 and can knock the inner wall of the adsorption block 73.

[0056] The silicone molding method of the embodiment of the present invention is applied to the silicone molding machine of the embodiment of the present invention, and its steps include:

[0057] In the first step, feeding: The moving mechanism drives the lower mold 5 to move forward. Subsequently, the staff puts the solid silicone raw material into the cavity 61. Then, the moving mechanism drives the lower mold 5 to move backward, thus resetting the lower mold 5. At this time, the lower mold 5 and the mold core 6 are located directly below the upper mold 4. The lifting mechanism drives the upper mold 4 to descend until the upper mold 4 fits with the mold core 6, completing the mold closing. During the mold closing process, the upper mold 4 abuts against the limit rod 92 and pushes the limit rod 92 to move downward. The limit rod 92 drives the limit plate 91 to move downward against the elastic force of the fourth elastic member 93. The limit plate 91 abuts against the movable plate 72 and pushes the movable plate 72 to move downward. The adsorption block 73 moves downward synchronously with the movable plate 72 until the upper end surface of the adsorption block 73 is flush with the upper surface of the mold core 6.

[0058] In the second step, plasticizing: Heat-conducting oil heated is input into the mold core 6 through the second liquid passage hole 63. After heating, the heat-conducting oil melts the solid silicone raw material into a liquid state. The heat-conducting oil flows from the rear to the front in the mold core 6, thereby driving the turbine 711 to rotate clockwise. The turbine 711 drives the vibration inner ring 82 to rotate clockwise. When the first driving rod 713 moves forward to the limit, it can restrict the rotation of the first gear 712, causing the vibration inner ring 82 to rotate relative to the vibration outer ring 81. The vibration block 83 continuously knocks on the vibration outer ring 81 under the action of the third elastic member 84, thereby causing the vibration outer ring 81 to vibrate. The vibration outer ring 81 transmits the vibration to the mold core 6 through the connecting rod and the first gear 712. The mold core 6 vibrates, causing the liquid raw material in the cavity 61 to vibrate, thereby eliminating the bubbles in the liquid raw material and avoiding the bubbles from affecting the quality of the finished product. After the defoaming is completed, normal-temperature heat-conducting oil is input into the mold core 6 through the second liquid passage hole 63, thereby cooling and shaping the liquid silicone material in the cavity 61. At this time, part of the silicone raw material will cool between the mold core 6 and the upper mold 4, forming flash. The flash can cover the adsorption holes.

[0059] Step 3, discharging. After the cooling is completed, the lifting mechanism drives the upper mold 4 to move upward. The limiting plate 91 is reset under the action of the fourth elastic member 93, so as to be disengaged from contact with the movable plate 72. At this time, normal-temperature heat-conducting oil is input into the mold core 6 through the first liquid passage hole 62. The heat-conducting oil flows from front to back in the mold core 6 and is discharged from the first liquid passage hole 62. The heat-conducting oil drives the turbine 711 to rotate counterclockwise. The vibration inner ring 82 rotates counterclockwise synchronously with the turbine 711, and drives the vibration outer ring 81 to rotate counterclockwise through the vibration block 83. The first gear 712 rotates counterclockwise synchronously with the vibration outer ring 81, so as to drive the first driving rod 713 to move backward. The first wedge block 7131 gradually approaches the second wedge block 722 until it contacts the second wedge block 722. Subsequently, the first wedge block 7131 pushes the second wedge block 722 to move downward, and further enables the movable plate 72 to move downward against the elastic force of the second elastic member 721. The adsorption block 73 moves downward synchronously with the movable plate 72, so as to form a negative-pressure chamber in the adsorption hole, thereby tightly adsorbing the flash. At this time, the driving motor drives the ejector plate 51 to move upward, so as to push the finished silicone product upward out of the cavity 61, and at the same time tear the flash from the finished silicone product, realizing automatic flash removal. Subsequently, normal-temperature heat-conducting oil is input into the mold core 6 through the second liquid passage hole 63. The heat-conducting oil flows from back to front in the mold core 6. The heat-conducting oil pushes the turbine 711 to rotate clockwise. The turbine 711 drives the first driving rod 713 to move forward through the first vibration mechanism 8, so that the first wedge block 7131 is disengaged from contact with the second wedge block 722. The movable plate 72 moves upward under the push of the second elastic member 721. The adsorption block 73 pushes the movable plate 72 to move upward synchronously and jacks up the flash, so that the flash is disengaged from contact with the upper surface of the mold core 6. The clockwise rotation of the turbine 711 also drives the ratchet 101 to rotate clockwise through the paddle 102. The flywheel 103 rotates clockwise synchronously with the ratchet 101, and drives the second driving rod 105 to reciprocate left and right through the crank 104. The second driving rod 105 drives the moving frame 106 to reciprocate left and right. The moving frame 106 drives the swing rod 107 to swing, and enables the knocking rod 108 to continuously knock the adsorption block 73, thereby preventing the flash from adhering to the adsorption block 73. The finished product and the flash are taken out manually, so that the molding operation of the next batch of silicone products can be carried out.

[0060] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A silicone molding machine, comprising: Frame, workbench, lifting assembly, upper mold, lower mold and mold core; The workbench is arranged on the frame, the lower mold is arranged on the workbench, the upper mold is arranged on the frame through a lifting assembly, the lifting assembly is used to drive the upper mold to move up and down, the mold core is arranged on the lower mold, the mold core is provided with a cavity, the lower mold is provided with an ejector plate, the ejector plate can extend into the mold cavity of the mold core, and the upper mold can stop against the top end of the mold core; The invention is characterized in that a deburring assembly is provided in the mold core, the deburring assembly includes a driving mechanism, a movable plate and an adsorption block, a plurality of adsorption holes are provided on the mold core, the plurality of adsorption holes are spaced along the circumference of the cavity, an adsorption block is slidably fitted in each adsorption hole, the movable plate is slidably fitted in the mold core, each adsorption block is connected to the movable plate, the driving mechanism includes a turbine, a first gear and a first driving rod, the turbine is rotatably fitted in the mold core, liquid holes are respectively provided on both sides of the mold core, and the driving mechanism is used to drive the movable plate to move up and down, thereby driving the adsorption block to move in the adsorption hole; A first vibration mechanism is provided between the turbine and the first gear, the first vibration mechanism comprising a vibration outer ring, a vibration inner ring and a vibration block, the vibration outer ring is connected to the first gear through a connecting rod, the vibration inner ring is connected to the turbine, a regular polygon inner hole is provided on the vibration outer ring, the vibration inner ring is located in the regular polygon inner hole, the vibration block is connected to the vibration inner ring through a third elastic member, the vibration block abuts against the inner wall of the regular polygon inner hole, and can slide along the inner wall of the regular polygon inner hole; A second vibration mechanism is provided in the mold core, and the second vibration mechanism includes a ratchet, a paddle, a flywheel, a crank, a second drive rod, a movable frame, a swing rod and a knocking rod. The ratchet is rotatably fitted on the turbine, the paddle is provided on the turbine and unidirectionally meshes with the ratchet, the flywheel is provided on the ratchet, the second drive rod is slidably fitted in the mold core, one end of the crank is connected to the flywheel, and the other end thereof is connected to the second drive rod, the movable frame is slidably fitted in the mold core, the second drive rod is slidably fitted with the movable frame, the swing rod is rotatably fitted in the adsorption block, a slide groove is provided on the swing rod, a slider is provided on the movable frame, the slider is slidably fitted in the slide groove, the knocking rod is provided at the top end of the swing rod, and the knocking rod can stop against the inner wall of the adsorption block.

2. The silicone molding machine according to claim 1, characterized in that: The liquid through hole is used to pass liquid medium into the mold core. The liquid medium flowing in the mold core can drive the turbine to rotate, and the turbine can drive the first gear to rotate. The first driving rod is slidably fitted in the mold core and is elastically connected to the mold core through a first elastic member. The first gear is meshed with the first driving rod. A first wedge block is provided on the first driving rod. The movable plate is connected to the mold core through a second elastic member. A second wedge block is provided on the movable plate. The first wedge block can stop against the second wedge block, thereby pushing the movable plate to move downward.

3. The silicone molding machine according to claim 2, characterized in that: A limiting mechanism is also provided in the mold core, and the limiting mechanism includes a limiting plate, a limiting rod and a fourth elastic member. The limiting plate is connected to the top surface of the mold core through the fourth elastic member, and the upper end surface of the mold core is provided with a limiting hole. The bottom end of the limiting rod is connected to the limiting plate, and the top end of the limiting rod passes through the limiting hole and extends upward. The limiting rod can stop against the upper mold, and the limiting plate can stop against the movable plate and push the limiting plate to move downward.

4. The silicone molding machine according to claim 3, characterized in that: A moving mechanism is provided on the workbench, and the moving mechanism includes a guide rail, a drive motor and a lead screw. The drive motor is provided on the workbench, and the lead screw is connected to the output end of the drive motor. Two guide rails are distributed on the workbench at intervals, and the lower mold is slidably matched with the guide rails, and the lower mold is threadedly matched with the lead screw, and the lower mold can move along the guide rails.

5. The silicone molding machine according to claim 4, characterized in that: The lifting assembly comprises a fixed seat and a hydraulic cylinder. The fixed seat is arranged on the frame, the hydraulic cylinder is arranged on the fixed seat, and the output end of the hydraulic cylinder is connected to the upper mold.

6. A silicone molding method, applied to the silicone molding machine according to claim 5, characterized in that: The following steps are involved: The first step is to discharge the material, put the solid silicone raw material into the cavity, and the lifting mechanism drives the upper mold to move downward until the upper mold fits the mold core to complete the mold closing; The second step is shaping. Liquid heat medium is introduced into the mold core to melt the solid silicone raw material. Then the liquid heat medium is discharged and liquid cold medium is introduced into the mold core to cool and shape the silicone raw material. The third step is discharge. After the mold is opened, the liquid cold medium flows in the mold core and drives the turbine to rotate forward. The turbine drives the first gear to rotate. The first gear engages with the first driving rod and drives the movable block to move downward through the first driving rod. The adsorption block moves downward synchronously to form a negative pressure cavity in the adsorption hole, thereby tightly adsorbing the flash on the side of the finished workpiece. The ejector plate moves upward, pushing the finished workpiece upward, and the flash can be torn off the finished workpiece while realizing discharge.

7. The silica gel molding method according to claim 6, characterized in that: When the mold is closed, the upper mold pushes the limit rod to move downward, and the limit rod pushes the movable plate to move downward through the limit plate. The liquid heat medium flows to drive the turbine to rotate, and the turbine drives the vibrating inner ring to rotate. When the first driving rod moves to the limit, it can limit the rotation of the first gear, thereby realizing the rotation of the vibrating inner ring relative to the vibrating outer ring. In this process, the vibrating block continuously hits the vibrating outer ring and transmits the vibration to the mold core.

8. The silica gel molding method according to claim 6, characterized in that: After discharging, liquid cold medium is input in reverse to reverse the turbine, which drives the ratchet and flywheel to rotate through the paddle, and the flywheel drives the second driving rod and the moving frame to move back and forth through the crank, and the moving frame drives the swing rod to swing, and makes the knocking rod knock the adsorption block, so that the adsorption block vibrates.

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