Heat-conducting silica gel calender and calendering trimming mechanism thereof

Abstract

The invention discloses a heat-conducting silica gel calender and a calendering and trimming mechanism thereof, and belongs to the technical field of silica gel calenders, the calendering and trimming mechanism comprises a frame body, two trimming units are arranged in the frame body, the two sides of the frame body are in threaded connection with adjusting screw rods, and the adjusting screw rods are in threaded connection with the frame body. The trimming unit comprises a mounting seat, a mounting groove is formed in one side of the mounting seat, a blocking piece used for trimming the heat-conducting silica gel is arranged on the mounting seat, placing grooves are formed in the top and the bottom of one side of the mounting seat, and the top of the other side of the mounting seat is provided with a pressing block used for pressing the heat-conducting silica gel. Elastic pieces are arranged on the two sides of the blocking piece, an adjusting piece is arranged in the mounting groove, and a fixing assembly is arranged in the mounting groove. The width of the blocking piece can be adjusted through the adjusting piece, the requirement for extruding heat conduction silica gel gaskets with different thicknesses can be met without disassembly and assembly, and operation is convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of silicone calenders, in particular to a thermal conductive silicone calender and a calendering and trimming mechanism thereof. Background Art

[0002] Thermally conductive silicone sheet is a thermally conductive medium material synthesized by a special process with silicone as the base material and various auxiliary materials such as metal oxides. When making thermally conductive silicone gaskets, the mixed semi-fluid raw materials need to be added to the gap between the upper pressing wheel and the lower pressing wheel of the calender. The upper pressing wheel and the lower pressing wheel rotate towards each other. Under the extrusion and shearing force of the upper pressing wheel and the lower pressing wheel, the raw materials undergo a certain degree of extension and deformation, thereby obtaining a continuous thin sheet of thermally conductive silicone gasket of the required specifications.

[0003] However, during calendering, the upper and lower pressing wheels apply extrusion force to the mixed raw materials, making the mixed raw materials thinner. At the same time, the mixed raw materials will also have a reaction force acting on the upper and lower pressing wheels. This force is called mold pressure. Without mold pressure, the upper and lower pressing wheels will not deform, and the thermal conductive silicone gasket will be uniform in all parts. Under the action of mold pressure, since the ends of the upper and lower pressing wheels are fixed, the deformation of the two ends is limited, while elastic deformation will occur in the middle, which will increase the gap between the upper and lower pressing wheels, making the calendered thermal conductive silicone gasket thick in the middle and thin on both sides, which does not meet the product requirements.

[0004] For example, a Chinese utility model patent with a publication number of CN220614721U discloses a thermally conductive silicone gasket calendering and trimming mechanism, comprising two elastic limiting mechanisms respectively fixed on both sides of a calender, wherein the elastic limiting mechanism comprises a base and a spring sheet, wherein the base is fixed on the calender, and one end of the spring sheet is fixed on the base, wherein the spring sheet comprises a connecting portion and a contact extrusion portion, wherein the connecting portion connects the base and the contact extrusion portion, wherein the inner side surface of the contact extrusion portion is in contact with the side edge of the mixed raw material, and the distance between the two contact extrusion portions is equal to the width to which the thermally conductive silicone gasket needs to be calendered.

[0005] The above solution has the following shortcomings in actual use: This solution adopts an elastic limiting mechanism. When both sides of the mixed raw materials contact the contact extrusion part of the elastic limiting mechanism, the extended mixed raw materials can be squeezed toward the center of the table to prevent the silicone gasket from becoming thinner on both sides. However, in actual use, the thickness of the thermal conductive silicone sheet is not fixed and will be produced according to actual order requirements. The above solution requires preparing more specifications of contact extrusion parts for replacement, which may increase production costs and cause a waste of time due to cumbersome replacement. Summary of the invention

[0006] The object of the present invention is to provide a thermally conductive silicone calender and a calendering and trimming mechanism thereof to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a calendering and trimming mechanism, comprising a frame, wherein two trimming units are arranged in the frame, and adjusting screws are threadedly connected to both sides of the frame, and the distance between the two trimming units is adjusted by rotating the adjusting screws, and an auxiliary extrusion assembly is arranged on the input side of the frame close to the thermal conductive silicone. The trimming unit comprises a mounting seat, a mounting groove is arranged on one side of the mounting seat, and a blocking member for trimming the thermal conductive silicone is arranged on the mounting seat, and placement grooves are arranged on the top and bottom of one side of the mounting seat, and both sides of the blocking member extend into the placement grooves and are respectively provided with elastic members, and an adjusting member for adjusting the contact area between the blocking member and the calendered thermal conductive silicone is arranged in the mounting groove, and a fixing assembly for extruding the blocking member is arranged in the mounting groove.

[0008] Preferably, the auxiliary extrusion assembly includes an extrusion roller, which is rotatably connected to a connecting arm, and the frame body is rotatably connected to a crank connecting rod, the crank connecting rod is rotatably connected to the end of the connecting arm, one end of the crank connecting rod passes through the frame body and is provided with a motor, two fixing plates are provided on the connecting arm, a spring 1 is provided between the fixing plate and the trimming unit, and an inclined downward pulling force is applied to the connecting arm through the spring 1.

[0009] Preferably, the adjusting member includes two mounting blocks, guide arms are provided at the top and bottom of the mounting blocks, a plug-in slot corresponding to the guide arm is provided on the mounting seat, two adjusting arms are rotatably connected to the mounting blocks, two I-shaped wheels are rotatably connected between the four adjusting arms, a spring 2 is provided between the two adjusting arms located on the same side, two guide shafts are rotatably connected between the two mounting blocks, and a driving member for adjusting the distance between the two I-shaped wheels is provided in the mounting slot.

[0010] Preferably, the driving member includes a double-threaded screw rod 1, one end of which passes through a mounting seat and is provided with an adjustment seat, two extrusion seats are threadedly connected to the double-threaded screw rod 1, the adjustment seat and the abutting side of the mounting block are in an inclined structure, one side of the mounting block has an inclined surface with the same inclination as the inclined structure of the adjustment seat, two partitions are provided in the mounting groove, and the partitions are rotatably connected to the double-threaded screw rod 1.

[0011] Preferably, the fixing assembly includes two extrusion plates, a plurality of guide columns are sleeved between the two extrusion plates, the ends of the guide columns are connected to the inner wall of the mounting groove, a plurality of racks are provided on the abutting sides of the extrusion plates and the blocking member, grooves corresponding to the extrusion plates are provided on the top and bottom of the inner wall of the mounting groove, the two grooves are respectively connected to the placement grooves, and a plurality of tooth grooves corresponding to the racks are provided on the inner wall of the placement groove.

[0012] Preferably, a shell is provided on one side of the mounting seat, an adjusting rod is rotatably connected to the shell, a double-threaded screw rod 2 is rotatably connected in the shell, bevel gears are provided on the double-threaded screw rod 2 and on the end of the adjusting rod, the two bevel gears are meshingly connected, two movable plates are threadedly connected to the double-threaded screw rod 2, one side of the movable plate extends to the interior of the mounting groove and is provided with a movable seat, the movable seat is rotatably connected to a push arm via a rotating shaft, the end of the push arm is rotatably connected to a fixed seat via a rotating shaft, the two extrusion plates are symmetrically arranged up and down, and the two extrusion plates are respectively connected to a plurality of fixed seats.

[0013] A heat-conducting silicone calender comprises two calendering rollers and the calendering trimming mechanism, wherein a part of the structure of the calendering trimming mechanism is arranged between the two calendering rollers.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention adjusts the distance between the two trimming units by rotating the adjusting screw, can be suitable for the size of thermally conductive silicone rubber to be produced, and has a wide range of applications. By setting a blocking piece, when both sides of the thermally conductive silicone mixed raw material contact the blocking piece, the extended mixed raw material can be squeezed toward the center of the table to prevent the thermally conductive silicone rubber from being thinner on both sides, thereby ensuring the uniformity of the thickness of the thermally conductive silicone rubber and the quality of the product. By adjusting the width of the blocking piece through the adjusting piece, the extrusion requirements of thermally conductive silicone gaskets of different thicknesses can be realized without disassembly and assembly, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the calendering and trimming mechanism of the present invention; Figure 2 for Figure 1 Side view of Figure 3 It is a diagram showing the use state of the calendering and trimming mechanism of the present invention; Figure 4 It is a structural schematic diagram of the trimming unit of the present invention; Figure 5 It is a structural cross-sectional view of the trimming unit of the present invention; Figure 6 for Figure 5A magnified view of the structure at center A; Figure 7 It is a structural schematic diagram of the mounting base of the present invention; Figure 8 for Figure 7 A magnified view of the structure at B in the middle; Fig. 9 This is a structural breakdown diagram of the adjusting member of the present invention; Fig.10 for Fig. 9 A magnified view of the structure at C in the middle; Fig.11 It is a structural disassembly diagram of the fixing component of the present invention.

[0016] In the figure: 100, frame; 101, adjusting screw; 200, auxiliary extrusion assembly; 201, extrusion roller; 202, connecting arm; 203, crankshaft connecting rod; 204, motor; 205, fixing plate; 206, spring 1; 300, trimming unit; 301, mounting seat; 302, mounting groove; 303, mounting block; 304, guide arm; 305, plug-in groove; 306, adjusting arm; 307, spring 2; 308, I-shaped wheel; 309, guide shaft; 310, blocking member; 311, placement groove; 312, elastic member; 313, extrusion seat; 314, double-threaded screw rod 1; 315, adjusting seat; 316, housing; 317, adjusting rod; 318, double-threaded screw rod 2; 319, bevel gear; 320, moving plate; 321, moving seat; 322, push arm; 323, fixed seat; 324, extrusion plate; 325, rack; 326, guide column; 327, groove; 328, tooth groove; 329, partition; 330, slider; 400. Calendering roller. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 11 , the present invention provides a technical solution: like Figure 1As shown, a calendering trimming mechanism includes a frame 100, in which two trimming units 300 are arranged, and both sides of the frame 100 are threadedly connected with adjusting screws 101, and the distance between the two trimming units 300 is adjusted by rotating the adjusting screws 101. An auxiliary extrusion component 200 is arranged on the input side of the frame 100 close to the thermal conductive silicone, and the distance between the two trimming units 300 is adjusted by rotating the adjusting screws 101. It can be suitable for the size of thermal conductive silicone required to be produced and has a wide range of applications. By setting the trimming units 300, when both sides of the thermal conductive silicone mixed raw materials contact the trimming units 300, the extended mixed raw materials can be squeezed toward the center of the table to prevent the thermal conductive silicone from being thinner on both sides, thereby ensuring the uniformity of the thickness of the thermal conductive silicone and ensuring the product quality.

[0019] like Figure 2 As shown, the auxiliary extrusion assembly 200 includes an extrusion roller 201, and a connecting arm 202 is rotatably connected to the extrusion roller 201. A crankshaft connecting rod 203 is rotatably connected in the frame 100. The crankshaft connecting rod 203 is rotatably connected to the end of the connecting arm 202. One end of the crankshaft connecting rod 203 passes through the frame 100 and is provided with a motor 204. Two fixing plates 205 are provided on the connecting arm 202. A spring 206 is provided between the fixing plate 205 and the trimming unit 300. The spring 206 applies an oblique downward pulling force to the connecting arm 202. The oblique downward pulling force applied to the connecting arm 202 by the spring 206 can make the thermal conductive silicone rubber be calendered before being pressed. The squeezing roller 201 can perform preliminary calendering on the mixed raw materials of the thermal conductive silicone to avoid the mixed raw materials being concentrated together, resulting in a larger force on the middle part of the calendering roller 400 during calendering, and can also further improve the uniformity of the thickness of the thermal conductive silicone. When in use, the crankshaft connecting rod 203 is driven by the control motor 204, and the squeezing roller 201 can reciprocate on the mixed raw materials under the tension of the spring 206. Since the force applied by the squeezing roller 201 to the mixed raw materials is less than the pressure during calendering, the squeezing roller 201 can only achieve preliminary calendering of the mixed raw materials, and the preliminary calendering width of the mixed raw materials is smaller than the calendering width of the mixed raw materials by the subsequent calendering roller 400.

[0020] like Figure 4-Figure 8As shown, the trimming unit 300 includes a mounting seat 301, a mounting groove 302 is provided on one side of the mounting seat 301, a blocking member 310 for trimming the thermal conductive silicone is provided on the mounting seat 301, a placement groove 311 is provided on the top and bottom of one side of the mounting seat 301, both sides of the blocking member 310 extend into the placement groove 311 and are provided with elastic members 312, an adjusting member for adjusting the contact area between the blocking member 310 and the rolled thermal conductive silicone is provided in the mounting groove 302, a fixing component for squeezing the blocking member 310 is provided in the mounting groove 302, and the mounting seat 301 is connected to the frame 1 through a slider 330 at the top. 00 sliding connection, wherein the elastic member 312 is elastic rubber, and the blocking member 310 is a duplex stainless steel sheet. The duplex stainless steel is composed of ferrite and austenite. Through special heat treatment and processing technology, the proportion and distribution of the two phases can be adjusted, so that the material exhibits different mechanical properties in different directions. The duplex stainless steel sheet has good bending performance in one direction, while it is difficult to bend in the other direction due to the distribution of phases and crystal orientation. The width of the blocking member 310 is adjusted by the adjusting member, so that the extrusion requirements of thermal conductive silicone gaskets of different thicknesses can be achieved without disassembly and assembly, and the operation is convenient.

[0021] Further, such as Figure 9-10 As shown, the adjusting member includes two mounting blocks 303, and guide arms 304 are provided on the top and bottom of the mounting blocks 303. The guide arms 304 can limit the moving direction of the mounting blocks 303 to avoid the phenomenon of offset when the mounting blocks 303 are moved, thereby improving stability. A plug-in slot 305 corresponding to the guide arm 304 is provided on the mounting seat 301. Two adjusting arms 306 are rotatably connected to the mounting blocks 303, and two I-shaped wheels 308 are rotatably connected between the four adjusting arms 306. A spring 2 307 is provided between the two adjusting arms 306 located on the same side. Two guide shafts 309 are rotatably connected between the two mounting blocks 303. The guide shaft 309 is used to change the direction in which the blocking member 310 applies force to the I-shaped wheel 308. When installing, the two sides of the blocking member 310 pass through the upper and lower sides of the two I-shaped wheels 308 respectively, and then pass between the two guide shafts 309 and are respectively inserted into the placement slot 311. A driving member for adjusting the distance between the two I-shaped wheels 308 is provided in the mounting slot 302.

[0022] Furthermore, the driving member includes a double-threaded screw rod 314, one end of which passes through the mounting seat 301 and is provided with an adjustment seat 315, two extrusion seats 313 are threadedly connected to the double-threaded screw rod 314, the adjustment seat 315 and the abutting side of the mounting block 303 are in an inclined structure, one side of the mounting block 303 has an inclined surface with the same inclination as the inclined structure of the adjustment seat 315, and two partitions 329 are provided in the mounting groove 302, and the partitions 329 are rotatably connected to the double-threaded screw rod 314.

[0023] Specifically, when it is necessary to adjust the width of the blocking member 310, by rotating the double-threaded screw 314, the two extrusion seats 313 move in opposite directions or towards each other under the action of the thread, and the mounting block 303 starts to move under the guidance of the inclined surface on the extrusion seat 313. Since the length of the blocking member 310 is fixed, the adjustment arm 306 has an angular deflection, so that with the cooperation of the I-shaped wheel 308, the contact area between the blocking member 310 and the thermally conductive silicone mixed raw material can be adjusted. The adjustment is convenient and quick, and there is no need to customize parts of various specifications.

[0024] like Fig.11 As shown, the fixing assembly includes two extrusion plates 324, and a plurality of guide columns 326 are sleeved between the two extrusion plates 324. The ends of the guide columns 326 are connected to the inner wall of the mounting groove 302. A plurality of racks 325 are provided on the abutting sides of the extrusion plates 324 and the blocking member 310. The top and bottom of the inner wall of the mounting groove 302 are provided with grooves 327 corresponding to the extrusion plates 324. The two grooves 327 are respectively connected to the placement groove 311. A plurality of tooth grooves 328 corresponding to the racks 325 are provided on the inner wall of the placement groove 311.

[0025] Furthermore, a shell 316 is provided on one side of the mounting seat 301, and an adjusting rod 317 is rotatably connected to the shell 316, and a double-threaded screw rod 318 is rotatably connected in the shell 316, and bevel gears 319 are provided on the double-threaded screw rod 318 and at the ends of the adjusting rod 317, and the two bevel gears 319 are meshingly connected, and two movable plates 320 are threadedly connected to the double-threaded screw rod 318, and one side of the movable plate 320 extends to the interior of the mounting groove 302 and is provided with a movable seat 321, and the movable seat 321 is rotatably connected to a push arm 322 via a rotating shaft, and the end of the push arm 322 is rotatably connected to a fixed seat 323 via a rotating shaft, and two extrusion plates 324 are symmetrically arranged up and down, and the two extrusion plates 324 are respectively connected to multiple fixed seats 323.

[0026] Specifically, when adjusting the width of the blocking member 310, in order to reduce the workload of the staff and improve the extrusion effect of the blocking member 310 on the mixed raw materials, the double-threaded screw 318 starts to rotate under the transmission of the two bevel gears 319 by rotating the adjusting rod 317, and the two moving plates 320 drive the moving seat 321 to move in the same or opposite directions under the action of the threads, so as to realize the pressing and loosening operation of the extrusion plate 324 on the blocking member 310. When the blocking member 310 is adjusted, the By controlling the extrusion plate 324 to be away from the blocking member 310, it is convenient for the staff to adjust the blocking member 310 under the elastic force of the elastic member 312. After the adjustment is completed, the adjustment rod 317 is rotated in the opposite direction to make the extrusion plate 324 press the blocking member 310 again, which can avoid the blocking member 310 from bending when the thermal conductive silicone mixed raw material is extruded. By setting the rack 325 and the tooth groove 328, the friction between the extrusion plate 324 and the blocking member 310 can be increased, and the fixing effect of the blocking member 310 can be further improved.

[0027] like Figure 3 As shown, a thermal conductive silicone calender includes two calender rollers 400 and a calender trimming mechanism, and part of the calender trimming mechanism is arranged between the two calender rollers 400.

[0028] The working process of this embodiment is as follows: when calendering the thermal conductive silicone mixed raw material, the frame 100 is fixed to the calender by bolts, and a part of the structure of the mounting seat 301 is passed between the two calendering rollers 400, and then the adjusting screw 101 is rotated to adjust the distance between the two trimming units 300, and then according to the required thickness of the thermal conductive silicone gasket, the contact area between the blocking member 310 and the calendered thermal conductive silicone is adjusted under the action of the adjusting member, so that the upper and lower sides of the blocking member 310 are respectively fitted with the two calendering rollers 400, and then the blocking member 310 is fixed under the action of the fixing component to avoid bending. During calendering, the auxiliary extrusion component 200 performs preliminary calendering on the mixed raw material, and then the preliminary calendered mixed raw material enters between the two calendering rollers 400. When the two sides of the mixed raw material contact the blocking member 310, the blocking member 310 can squeeze the extended mixed raw material toward the center of the table to prevent the two sides of the thermal conductive silicone from becoming thinner.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calendering trimming mechanism, comprising a frame, characterized in that: Two trimming units are arranged in the frame, and adjusting screws are threadedly connected to both sides of the frame, and the distance between the two trimming units is adjusted by rotating the adjusting screws. An auxiliary extrusion assembly is arranged on the input side of the frame close to the thermal conductive silica gel; The trimming unit includes a mounting seat, a mounting groove is provided on one side of the mounting seat, a blocking member for trimming the thermal conductive silicone is arranged on the mounting seat, placement grooves are provided on the top and bottom of one side of the mounting seat, both sides of the blocking member extend into the placement grooves and are provided with elastic members, an adjusting member for adjusting the contact area between the blocking member and the rolled thermal conductive silicone is provided in the mounting groove, and a fixing component for squeezing the blocking member is provided in the mounting groove.

2. A calendering trimming mechanism according to claim 1, characterized in that: The auxiliary extrusion assembly includes an extrusion roller, a connecting arm is rotatably connected to the extrusion roller, a crank connecting rod is rotatably connected to the frame body, the crank connecting rod is rotatably connected to the end of the connecting arm, one end of the crank connecting rod passes through the frame body and is provided with a motor, two fixing plates are provided on the connecting arm, a spring 1 is provided between the fixing plate and the trimming unit, and a downward inclined pulling force is applied to the connecting arm through the spring 1.

3. A calendering trimming mechanism according to claim 1, characterized in that: The adjusting member comprises two mounting blocks, the top and bottom of the mounting blocks are provided with guide arms, the mounting seat is provided with plug-in slots corresponding to the guide arms, the mounting blocks are rotatably connected with two adjusting arms, two I-shaped wheels are rotatably connected between the four adjusting arms, a spring 2 is provided between the two adjusting arms on the same side, two guide shafts are rotatably connected between the two mounting blocks, and a driving member for adjusting the distance between the two I-shaped wheels is provided in the mounting slot.

4. A calendering trimming mechanism according to claim 3, characterized in that: The driving member includes a double-threaded screw rod 1, one end of which passes through a mounting seat and is provided with an adjustment seat, two extrusion seats are threadedly connected to the double-threaded screw rod 1, the adjustment seat and the abutting side of the mounting block are in an inclined structure, one side of the mounting block has an inclined surface with the same inclination as the inclined structure of the adjustment seat, two partitions are provided in the mounting groove, and the partitions are rotatably connected to the double-threaded screw rod 1.

5. The calendering trimming mechanism according to claim 1, characterized in that: The fixing assembly includes two extrusion plates, and a plurality of guide columns are sleeved between the two extrusion plates. The ends of the guide columns are connected to the inner wall of the mounting groove. A plurality of racks are provided on the abutting sides of the extrusion plates and the blocking member. Grooves corresponding to the extrusion plates are provided on the top and bottom of the inner wall of the mounting groove. The two grooves are respectively connected to the placement grooves, and a plurality of tooth grooves corresponding to the racks are provided on the inner wall of the placement groove.

6. A calendering trimming mechanism according to claim 5, characterized in that: A shell is provided on one side of the mounting seat, an adjusting rod is rotatably connected to the shell, a double-threaded screw rod 2 is rotatably connected in the shell, bevel gears are provided on the double-threaded screw rod 2 and on the end of the adjusting rod, the two bevel gears are meshingly connected, two movable plates are threadedly connected to the double-threaded screw rod 2, one side of the movable plate extends to the inside of the mounting groove and is provided with a movable seat, the movable seat is rotatably connected to a push arm via a rotating shaft, the end of the push arm is rotatably connected to a fixed seat via a rotating shaft, the two extrusion plates are symmetrically arranged up and down, and the two extrusion plates are respectively connected to a plurality of fixed seats.

7. A thermally conductive silicone calender, characterized in that: The calender comprises two calendering rollers and a calendering and trimming mechanism as described in any one of claims 1 to 6, wherein a part of the structure of the calendering and trimming mechanism is arranged between the two calendering rollers.

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