A thermal conductive silicone calender and its calendering and trimming mechanism

Abstract

The present invention discloses a calender for thermal conductive silicone and its calendering and trimming mechanism, belonging to the technical field of silicone calenders. The calendering and trimming mechanism includes a frame body. Two trimming units are arranged inside the frame body. Adjusting screws are threadedly connected to both sides of the frame body. An auxiliary extrusion assembly is arranged on the input side of the frame body close to the thermal conductive silicone. The trimming unit includes a mounting seat. An installation groove is formed on one side of the mounting seat. A blocking member for trimming the thermal conductive silicone is arranged on the mounting seat. Placing grooves are formed at the top and bottom on one side of the mounting seat. Elastic members are arranged on both sides of the blocking member. An adjusting member is arranged in the installation groove. A fixing component is arranged in the installation groove. The width of the blocking member can be adjusted through the adjusting member, and the extrusion requirements for thermal conductive silicone gaskets with different thicknesses can be realized without disassembly and assembly, and the operation is convenient.

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:

[0006] 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

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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 extrusion seats and the abutting sides 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 extrusion seat, two partitions are provided in the mounting groove, and the partitions are rotatably connected to the double-threaded screw rod 1.

[0012] Preferably, the fixing component includes two pressing plates, a plurality of guide posts are sleeved between the two pressing plates, the ends of the guide posts are connected to the inner wall of the installation groove, a plurality of racks are arranged on the abutting sides of the pressing plates and the blocking members, grooves corresponding to the pressing plates are respectively formed at the top and bottom of the inner wall of the installation groove, the two grooves are respectively communicated with the placing groove, and a plurality of tooth grooves corresponding to the racks are formed on the inner wall of the placing groove.

[0013] Preferably, a housing is arranged on one side of the mounting seat, an adjusting rod is rotatably connected to the housing, a double-threaded screw rod II is rotatably connected to the housing, tapered gears are arranged on the double-threaded screw rod II and the end of the adjusting rod, and the two tapered gears are meshed and connected. Two moving plates are threadedly connected to the double-threaded screw rod II, one side of the moving plate extends into the installation groove and is provided with a moving seat, a push arm is rotatably connected to the moving seat through a rotating shaft, the end of the push arm is rotatably connected to a fixed seat through a rotating shaft, the two pressing plates are arranged symmetrically up and down, and the two pressing plates are respectively connected to a plurality of fixed seats.

[0014] A thermal conductive silicone calender, the calender includes two calender rolls and the calender trimming mechanism, and part of the structure of the calender trimming mechanism is arranged between the two calender rolls.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] By rotating the adjusting screw rod to adjust the distance between the two trimming units, the present invention can be applicable to the size of the thermal conductive silicone required for production, with a wide application range. By setting the blocking member, when the two sides of the thermal conductive silicone mixed raw material contact the blocking member, the spread mixed raw material can be squeezed towards the center of the table, preventing the phenomenon of thinner sides of the thermal conductive silicone, ensuring the uniformity of the thickness of the thermal conductive silicone, guaranteeing the product quality, and by adjusting the width of the blocking member through the adjusting member, the extrusion requirement for thermal conductive silicone gaskets with different thicknesses can be realized without disassembly, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole calender trimming mechanism of the present invention;

[0018] Figure 2 is Figure 1 the side view of;

[0019] Figure 3 is a usage state diagram of the calender trimming mechanism of the present invention;

[0020] Figure 4 is a schematic structural diagram of the trimming unit of the present invention;

[0021] Figure 5 Structural sectional view of the trimming unit of the present invention;

[0022] Figure 6 is Figure 5 Enlarged view of the structure at position A in

[0023] Figure 7 Schematic structural diagram of the mounting base of the present invention;

[0024] Figure 8 is Figure 7 Enlarged view of the structure at position B in

[0025] Figure 9 Exploded view of the structure of the adjusting member of the present invention;

[0026] Figure 10 is Figure 9 Enlarged view of the structure at position C in

[0027] Figure 11 Exploded view of the structure of the fixing assembly of the present invention.

[0028] In the figure:

[0029] 100, frame; 101, adjusting screw;

[0030] 200, auxiliary extrusion assembly; 201, extrusion roller; 202, connecting arm; 203, crank connecting rod; 204, motor; 205, fixing plate; 206, first spring;

[0031] 300, trimming unit; 301, mounting base; 302, mounting groove; 303, mounting block; 304, guiding arm; 305, insertion groove; 306, adjusting arm; 307, second spring; 308, spool; 309, guiding shaft; 310, blocking member; 311, placing groove; 312, elastic member; 313, extrusion seat; 314, first double-threaded lead screw; 315, adjusting seat; 316, housing; 317, adjusting rod; 318, second double-threaded lead screw; 319, bevel gear; 320, moving plate; 321, moving seat; 322, pushing arm; 323, fixing seat; 324, extrusion plate; 325, rack; 326, guiding column; 327, groove; 328, tooth groove; 329, partition; 330, slider;

[0032] 400, calendering roller. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 - 11 , the present invention provides a technical solution:

[0035] As Figure 1 shown, a calendering and trimming mechanism includes a frame body 100. Two trimming units 300 are arranged inside the frame body 100. Adjusting screws 101 are threadedly connected to both sides of the frame body 100. By rotating the adjusting screws 101, the distance between the two trimming units 300 can be adjusted. An auxiliary extrusion assembly 200 is arranged on the input side of the frame body 100 close to the thermal conductive silicone. By rotating the adjusting screws 101 to adjust the distance between the two trimming units 300, it can be applicable to the size of the thermal conductive silicone required for production, and has a wide application range. By arranging the trimming units 300, when both sides of the mixed raw material of the thermal conductive silicone contact the trimming units 300, the spread mixed raw material can be extruded towards the center of the table, preventing the phenomenon of thinner sides of the thermal conductive silicone, ensuring the uniformity of the thickness of the thermal conductive silicone, and ensuring the product quality.

[0036] As Figure 2 shown, the auxiliary extrusion assembly 200 includes an extrusion roller 201. A connecting arm 202 is rotatably connected to the extrusion roller 201. A crank connecting rod 203 is rotatably connected inside the frame body 100. The crank connecting rod 203 is rotatably connected to the end of the connecting arm 202. One end of the crank connecting rod 203 penetrates through the frame body 100 and is provided with a motor 204. Two fixing plates 205 are arranged on the connecting arm 202. A first spring 206 is arranged between the fixing plate 205 and the trimming unit 300. By applying an inclined downward pulling force to the connecting arm 202 through the first spring 206. Among them, by using the inclined downward pulling force applied by the first spring 206 to the connecting arm 202, before calendering the thermal conductive silicone, the extrusion roller 201 can perform preliminary calendering on the mixed raw material of the thermal conductive silicone, avoiding the concentration of the mixed raw material together, resulting in a large 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. During use, by controlling the motor 204 to drive the crank connecting rod 203, under the pulling force of the first spring 206, the extrusion roller 201 can reciprocate on the mixed raw material. Since the force applied by the extrusion roller 201 to the mixed raw material is less than the pressure during calendering, the extrusion roller 201 can only perform preliminary calendering on the mixed raw material, and the width of the preliminary calendering of the mixed raw material is less than the calendering width of the subsequent calendering roller 400 on the mixed raw material.

[0037] like Figures 4 - 8 As 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.

[0038] Further, such as Figures 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.

[0039] Further, the driving member includes a double-threaded lead screw 314. One end of the double-threaded lead screw 314 penetrates through the mounting seat 301 and is provided with an adjusting seat 315. Two pressing seats 313 are threadedly connected to the double-threaded lead screw 314. The side of the pressing seat 313 that abuts against the mounting block 303 is of an inclined structure. One side of the mounting block 303 has an inclined surface with the same inclination as the inclined structure of the pressing seat 313. Two partition plates 329 are arranged in the mounting groove 302, and the partition plates 329 are rotatably connected to the double-threaded lead screw 314.

[0040] Specifically, when it is necessary to adjust the width of the blocking member 310, by rotating the double-threaded lead screw 314, the two pressing seats 313 move towards or in opposite directions under the action of the thread. Under the guidance of the inclined surface on the pressing seat 313, the mounting block 303 starts to move. Since the length of the blocking member 310 is fixed, the adjusting arm 306 deflects at an angle. Thus, with the cooperation of the spool 308, the contact area between the blocking member 310 and the thermally conductive silicone mixture can be adjusted. The adjustment is convenient and fast, and there is no need to customize various specifications of parts.

[0041] As Figure 11 shown, the fixing assembly includes two pressing plates 324. A plurality of guide posts 326 are sleeved between the two pressing plates 324. The ends of the guide posts 326 are connected to the inner wall of the mounting groove 302. A number of racks 325 are arranged on the sides of the pressing plates 324 that abut against the blocking member 310. Grooves 327 corresponding to the pressing plates 324 are opened at the top and bottom of the inner wall of the mounting groove 302. The two grooves 327 are respectively communicated with the placing groove 311. A number of tooth grooves 328 corresponding to the racks 325 are opened on the inner wall of the placing groove 311.

[0042] Further, a housing 316 is arranged on one side of the mounting seat 301. An adjusting rod 317 is rotatably connected to the housing 316. A double-threaded lead screw 318 is rotatably connected to the housing 316. Tapered gears 319 are arranged on the double-threaded lead screw 318 and the end of the adjusting rod 317. The two tapered gears 319 are meshed with each other. Two moving plates 320 are threadedly connected to the double-threaded lead screw 318. One side of the moving plate 320 extends into the mounting groove 302 and is provided with a moving seat 321. A push arm 322 is rotatably connected to the moving seat 321 through a rotating shaft. The end of the push arm 322 is rotatably connected to a fixed seat 323 through a rotating shaft. The two pressing plates 324 are symmetrically arranged up and down, and the two pressing plates 324 are respectively connected to a plurality of fixed seats 323.

[0043] 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 material, the double-threaded screw rod two 318 starts to rotate by rotating the adjusting rod 317 under the drive of the two bevel gears 319. Under the action of the threads, the two moving plates 320 drive the moving seat 321 to move towards or in the opposite direction, so as to realize the pressing and loosening operations of the pressing plate 324 on the blocking member 310. When adjusting the blocking member 310, by controlling the pressing plate 324 to move 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, reverse-rotate the adjusting rod 317 to make the pressing plate 324 press the blocking member 310 again, which can prevent the blocking member 310 from bending when extruding the heat-conducting silicone mixed raw material. By setting the rack 325 and the tooth groove 328, the friction force between the pressing plate 324 and the blocking member 310 can be increased, and the fixing effect on the blocking member 310 can be further improved.

[0044] As Figure 3 shown, a heat-conducting silicone calender includes two calender rolls 400 and a calendering and trimming mechanism, and part of the structure of the calendering and trimming mechanism is arranged between the two calender rolls 400.

[0045] The working process of this embodiment is as follows: When calendering the heat-conducting silicone mixed raw material, fix the frame 100 on the calender by bolts, and make part of the structure of the mounting seat 301 pass through between the two calender rolls 400. Then rotate the adjusting screw 101 to adjust the distance between the two trimming units 300. Then, according to the required thickness of the heat-conducting silicone gasket, adjust the contact area between the blocking member 310 and the calendered heat-conducting silicone under the action of the adjusting member, so that the upper and lower sides of the blocking member 310 are respectively attached to the two calender rolls 400. Then, fix the blocking member 310 under the action of the fixing component to prevent bending. During calendering, the auxiliary extrusion component 200 preliminarily calenders the mixed raw material, and then the preliminarily calendered mixed raw material enters between the two calender rolls 400. When the two sides of the mixed raw material come into contact with the blocking member 310, the blocking member 310 can squeeze the spread mixed raw material towards the center of the table, preventing the phenomenon of thinner sides of the heat-conducting silicone.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. 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 comprises 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 provided on the mounting seat, a placement groove is provided on the top and bottom of one side of the mounting seat, both sides of the blocking member extend into the placement groove and are provided with elastic members, an adjusting member for adjusting the contact area between the blocking member and the calendered thermal conductive silicone is provided in the mounting groove, and a fixing component for squeezing the blocking member is provided in the mounting groove; The adjusting member comprises two mounting blocks, the top and bottom of the mounting blocks are both provided with guide arms, the mounting seat is provided with a plug-in slot corresponding to the guide arm, the mounting blocks are both 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; 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 extrusion 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 extrusion seat, two partitions are provided in the mounting groove, and the partitions are rotatably connected to the double-threaded screw rod 1.

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 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.

4. A calendering trimming mechanism according to claim 3, 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.

5. A thermally conductive silicone calender, characterized in that: The calender comprises two calendering rollers and a calendering and trimming mechanism as claimed in any one of claims 1 to 4, wherein a part of the structure of the calendering and trimming mechanism is arranged between the two calendering rollers.

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