A manufacturing device and manufacturing method of functional rubber strip

Abstract

The present invention belongs to the technical field of rubber strip manufacturing, and specifically relates to a manufacturing device and manufacturing method of a functional rubber strip, including a first precision extrusion extruder for mixing the main material, a second precision extrusion extruder for mixing the auxiliary material, a heating mold sleeve, a multifunctional speed measuring device and an automatic winding device, the heating mold sleeve has a mold sleeve main channel for feeding the main material and a mold sleeve side channel for feeding the auxiliary material, the outlet end of the first precision extrusion extruder is docked with the mold sleeve main channel of the heating mold sleeve, the outlet end of the second precision extrusion extruder is docked with the mold sleeve side channel of the heating mold sleeve, an extrusion mold is arranged in the mold sleeve main channel, and the cavity of the extrusion mold is connected with the mold sleeve main channel and the mold sleeve side channel. The manufacturing method and manufacturing device of the present invention can realize the direct molding of the functional rubber strip in the die, avoiding secondary drying tunnel molding, and has stable process, precise size, high production efficiency and sufficient cross-linking.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber strip manufacturing, and in particular relates to a manufacturing device and a manufacturing method for a functional rubber strip. Background Art

[0002] Rubber strips are products that can provide shock absorption, waterproofing, sound insulation, heat insulation, dust prevention, and fixation. At present, the extrusion of functional rubber strips uses a screw machine or a plunger extruder for composite extrusion, followed by cross-linking through a drying tunnel, UV, infrared, etc. Because the extrusion expansion effect will occur when the functional rubber is extruded through the mold, it is difficult to control the size and the process stability cycle is long. At present, the extrusion pressure required for extrusion using in-mold heating is high and the extrusion speed is slow, and the production efficiency and yield rate are extremely low. Summary of the invention

[0003] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution for a manufacturing device and a manufacturing method of a functional rubber strip.

[0004] The manufacturing device of a functional rubber strip is characterized by comprising a first precision extrusion extruder for mixing the main material, a second precision extrusion extruder for mixing the auxiliary material, a heating mold sleeve, a multifunctional speed measuring device and an automatic winding device. The heating mold sleeve has a mold sleeve main channel for feeding the main material and a mold sleeve side channel for feeding the auxiliary material. The outlet end of the first precision extrusion extruder is connected to the mold sleeve main channel of the heating mold sleeve, and the outlet end of the second precision extrusion extruder is connected to the mold sleeve side channel of the heating mold sleeve. An extrusion mold is arranged in the mold sleeve main channel, and the cavity of the extrusion mold is connected to the mold sleeve main channel and the mold sleeve side channel. The automatic winding device is used to pull the extruded rubber strip forward and wind it around a disk, and the multifunctional speed measuring device is used to measure the speed of the passing rubber strip.

[0005] The device for making a functional rubber strip is characterized in that the heating mold sleeve includes a heating mold sleeve, which is a medium-hole structure with a cavity inside for installing an extrusion mold. A cooling device, a heat insulation device and an independent heating device are arranged on the heating mold sleeve from front to back in sequence. There are at least two independent heating devices, which are arranged in a ring on the outer wall of the heating mold sleeve, and a heat insulation piece is arranged between adjacent independent heating devices.

[0006] The manufacturing device of a functional rubber strip is characterized in that two independent heating devices are arranged outside the heating mold sleeve, the independent heating devices are semicircular ring structures, and the two independent heating devices wrap the corresponding parts of the outer wall of the heating mold sleeve; the independent heating devices are copper blocks containing heating resistance wires; the cooling device is a jacket sleeved outside the heating mold sleeve, and a cooling water channel is formed between the jacket and the heating mold sleeve; the heat insulation device is a heat insulation sleeve sleeved on the outer wall of the heating mold sleeve.

[0007] The device for making a functional rubber strip is characterized in that the extrusion mold includes a core fixing base, a composite molding part and a molding die which are fixedly connected in sequence front and back, a plurality of through main flow channels are arranged on the core fixing base, the composite molding part and the molding die, a core is arranged through the main flow channel, and a gap is provided between the two for molding the rubber strip, the core is fixedly connected to the core fixing base, a fourth auxiliary material diversion port corresponding to the side channel of the mold sleeve is provided on one side or both sides of the extrusion mold, a fourth auxiliary material distribution groove connected to the fourth auxiliary material diversion port and a fourth auxiliary material gate connected to the fourth auxiliary material distribution groove are provided in the extrusion mold, and the fourth auxiliary material gate is located at the front end of the molding die and is connected to the main flow channel.

[0008] The device for making a functional rubber strip is characterized in that it includes an extrusion mold including a core fixing base, a composite molding part and a molding mouth mold which are fixedly connected in sequence front and back, a plurality of through main flow channels are arranged on the core fixing base, the composite molding part and the molding mouth mold, a core is arranged through the main flow channel, and a gap is provided between the two for molding the rubber strip, the core is fixedly connected to the core fixing base, and the extrusion mold is provided with a first auxiliary material diversion port, a first auxiliary material distribution groove, a first auxiliary material gate, a second auxiliary material diversion port, a second auxiliary material distribution groove and a second auxiliary material gate in sequence from front to back, the first auxiliary material diversion port, the first auxiliary material distribution groove and the first auxiliary material gate are connected in sequence, the second auxiliary material diversion port, the second auxiliary material distribution groove and the second auxiliary material gate are connected in sequence, and the first auxiliary material gate and the second auxiliary material gate are respectively connected to the main flow channel.

[0009] The functional rubber strip manufacturing device is characterized in that the multifunctional speed measuring device includes a workbench, a feed guide wheel, an upper grating and a lower grating are arranged at the front end of the workbench, the upper grating and the lower grating are respectively located at the upper and lower ends of the workbench, a speed measuring wheel is arranged in the middle of the workbench, and a discharge guide wheel is arranged at the rear end of the workbench.

[0010] The manufacturing method implemented by the manufacturing device is characterized by comprising the following steps:

[0011] S1, mixing the raw materials of the rubber strip to obtain a mixed rubber;

[0012] S2, putting the mixed rubber into a precision extrusion extruder for continuous extrusion;

[0013] S3, the rubber material extruded by the precision extrusion extruder enters into a heating die sleeve with an extrusion die for extrusion;

[0014] S4. The semi-finished rubber strip extruded from the extrusion die is inspected online by a multifunctional speed measuring device, and the semi-finished rubber strip after the inspection is wound on a disk by an automatic winding device;

[0015] S5, performing secondary vulcanization on the semi-finished product after coiling to obtain a functional rubber strip finished product.

[0016] The method for making a functional rubber strip is characterized in that in step S1, the mixed rubber is divided into a silicone rubber mix and a functional rubber mix; step S2 is specifically: the silicone rubber mix and the functional rubber mix are extruded by a precision extrusion extruder respectively; the specific operation of step S3 is: the silicone rubber mix extruded by the precision extrusion extruder enters from the main flow channel of the extrusion die, the functional rubber mix enters from the auxiliary material diversion port of the extrusion die, and the functional rubber mix and the silicone rubber mix are extruded together.

[0017] The method for making a functional rubber strip is characterized in that the functional rubber compound is extruded by one or two electromagnetic shielding rubber compound extruders, and the silicone rubber compound is extruded by one silicone rubber compound extruder.

[0018] The method for making a functional rubber strip is characterized in that the extrusion heating temperature in step S3 is 150-300°C; the extrusion speed of the extrusion mold in step S3 is 0.3m / min-0.7m / min; the secondary vulcanization temperature in step S5 is 180-220°C and the time is 2-4h.

[0019] Compared with the prior art, the manufacturing method and manufacturing device of the present invention can realize the direct molding of the functional rubber strip in the die, avoiding the secondary drying tunnel molding, and has stable process, accurate size, high production efficiency and sufficient cross-linking. The functional rubber strip semi-finished product is further cross-linked through secondary vulcanization, thereby improving the mechanical properties and compression permanent deformation properties of the rubber strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the manufacturing device of Example 1;

[0021] Figure 2 This is a structural schematic diagram of the heating mold set of Example 1 when a cooling device, a heat insulation device and an independent heating device are installed;

[0022] Figure 3 It is a longitudinal cross-sectional schematic diagram of the connection structure between the heating mold sleeve and the cooling device of Example 1;

[0023] Figure 4 It is a longitudinal cross-sectional schematic diagram of the connection structure between the heating mold sleeve and the heat insulation device of Example 1;

[0024] Figure 5 It is a longitudinal cross-sectional schematic diagram of the connection structure between the heating mold sleeve and the independent heating device of Example 1;

[0025] Figure 6 This is a structural schematic diagram of the heating mold sleeve of Example 1 with the cooling device, the heat insulation device and the independent heating device removed;

[0026] Figure 7 This is a schematic diagram of the extrusion die structure of Example 1;

[0027] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0028] Fig. 9 This is a schematic diagram of the exploded structure of the extrusion die of Example 1;

[0029] Fig.10 This is a schematic structural diagram of a multifunctional speed measuring device according to Example 1;

[0030] Fig.11 This is a schematic diagram of the connection structure between the resistance testing device and the driving mechanism of Example 1;

[0031] Fig.12 It is a structural schematic diagram of the manufacturing device of Example 2;

[0032] Fig.13 It is a schematic cross-sectional view of the extrusion die of Example 2;

[0033] Fig.14 for Fig.13 Enlarged view of point B in the middle;

[0034] Fig.15 for Fig.13 Enlarged view of point C in the middle;

[0035] Fig.16 It is a schematic longitudinal section diagram of the extrusion die of Example 2;

[0036] Fig.17 This is a schematic diagram of the exploded structure of the extrusion die of Example 2;

[0037] Fig.18 It is a flow chart of the manufacturing method of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Example 1

[0040] A device for making a functional rubber strip comprises a first precision extrusion extruder 1 for mixing a main material, two second precision extrusion extruders 2 for mixing auxiliary materials, a heating die sleeve 3, a multifunctional speed measuring device 4 and an automatic winding device 5. The heating die sleeve 3 has a die sleeve main channel 300 for feeding the main material and two die sleeve side channels 301 for feeding the auxiliary materials. The outlet end of the first precision extrusion extruder 1 is connected to the die sleeve main channel 300 of the heating die sleeve 3, and the outlet end of the second precision extrusion extruder 2 is connected to the die sleeve side channel 301 of the heating die sleeve 3. An extrusion die 6 is arranged in the die sleeve main channel 300, and a cavity 600 of the extrusion die 6 is connected to the die sleeve main channel 300 and the die sleeve side channel 301. The automatic winding device 5 is a conventional device, which is used to pull the extruded rubber strip forward and coil it. The multifunctional speed measuring device 4 is used to measure the speed of the passing rubber strip.

[0041] The heating mold sleeve 3 is provided with a cooling device, a heat insulating device and an independent heating device 7 from front to back. There are two independent heating devices 7, which are arranged on the outer wall of the heating mold sleeve 3 in a ring shape, and a heat insulating member 9 is arranged between adjacent independent heating devices 7. The two independent heating devices 7 wrap the corresponding parts of the outer wall of the heating mold sleeve 3. The outer wall of the corresponding part of the heating mold sleeve 3 is a cylindrical structure. The independent heating device 7 is a semicircular ring structure, and the semicircular structure can better match the shape of the heating mold sleeve 3. The independent heating device 7 is a copper block containing a heating resistance wire, and the heating resistance wire is embedded in the copper block or wound around the copper block. The heating resistance wire is connected to an external power supply to heat the rubber material in the mold.

[0042] The cooling device is a jacket 10 that is sleeved outside the heating mold sleeve 3. Two cooling water channels 11 are formed between the jacket 10 and the heating mold sleeve 3. Each cooling water channel 11 has a water inlet and a water outlet, that is, there is a partition in the middle of the jacket 10, which divides the internal space of the jacket 10 into two. Side inlets 1000 corresponding to the positions of the mold sleeve side channels 101 of the heating mold sleeve 3 are also opened on both sides of the jacket 10 for feeding auxiliary materials.

[0043] The heat insulating device is a heat insulating sleeve 12 sleeved on the outer wall of the heating mold sleeve 3. The heat insulating sleeve 12 and the heat insulating member 9 are made of heat insulating material, and the heat insulating material can preferably be heat insulating ceramics.

[0044] The heating mold sleeve 3 is provided with temperature detection holes 8 corresponding to the independent heating devices 7 one by one. The temperature detection holes 8 are used in conjunction with a temperature measuring device. The temperature measuring device can be a thermocouple probe. The temperature can be measured by inserting the probe into the temperature measuring hole 8.

[0045] The main body of the heating mold sleeve 3 is a tubular structure for installing the mold and setting up a cooling device, an insulating device and an independent heating device 7. The front end of the heating mold sleeve 3 has a flange structure, and four fixing holes 302 for connecting to the extruder are opened on the flange structure, which is specifically fixedly connected to the output end of the extruder by bolts.

[0046] When the heating mold sleeve 3 of this embodiment is working, the extrusion mold 6 is installed in the cavity of the heating mold sleeve 3, the extruder extrude, and water flows through the cooling water channel 11. There are two independent heating devices 7, and the heating temperatures of the two independent heating devices 7 are the same to ensure the uniformity of product performance.

[0047] The extrusion die 6 in this embodiment is a multi-cavity composite extrusion die, including a core fixing base 601, a composite molding part 602 and a molding die 603 which are fixedly connected in sequence front and back, a plurality of through main channels 604 are arranged on the core fixing base 601, the composite molding part 602 and the molding die 603, a core 608 is arranged through the main channel 604, and a gap is provided between the two for molding the rubber strip, the core 608 is fixedly connected to the core fixing base 601, fourth auxiliary material diversion ports 605 are provided on both sides of the extrusion die, a fourth auxiliary material distribution groove 606 connected to the fourth auxiliary material diversion port 605 and a fourth auxiliary material gate 607 connected to the fourth auxiliary material distribution groove 606 are provided in the extrusion die 6, and the fourth auxiliary material gate 607 is located at the front end of the molding die 603 and is connected to the main channel 604.

[0048] As an optimized structure of a multi-cavity composite extrusion die: the fourth auxiliary material diversion port 605 is opened on the core fixing base 601 , the fourth auxiliary material distribution groove 606 is opened on the composite molded part 602 , and the fourth auxiliary material gate 607 is opened on the front end of the molding die 603 .

[0049] As an optimized structure of a multi-cavity composite extrusion die: the fourth auxiliary material diversion port 605 is an L-shaped structure, which can play a role in guiding the auxiliary material.

[0050] As an optimized structure of the multi-cavity composite extrusion die: a contraction ramp 6033 for evenly distributing pressure is provided in the fourth auxiliary material distribution groove 606.

[0051] As an optimized structure of the multi-cavity composite extrusion die: the molding die 603 is provided with a third sharp corner 6031 at the inner end of the fourth auxiliary material gate 607 to narrow the connection between the fourth auxiliary material gate 607 and the main channel 604 .

[0052] As an optimized structure of a multi-cavity composite extrusion die: the core fixing base 601, the composite molding 602 and the molding die 603 are fixedly connected by positioning pins, and the positioning pins can be set to different diameters to prevent the mold from being installed incorrectly.

[0053] As an optimized structure of a multi-cavity composite extrusion die, there are 2 to 6 main channels 604, preferably 4.

[0054] As an optimized structure of a multi-cavity composite extrusion die: two fourth auxiliary material diversion ports 605, fourth auxiliary material distribution grooves 606 and fourth auxiliary material gates 607 are symmetrically arranged, and two are located on both sides of the extrusion die, which is equivalent to the fourth auxiliary material diversion ports 605, fourth auxiliary material distribution grooves 606 and fourth auxiliary material gates 607 forming two auxiliary material channels, which are arranged on both sides of the extrusion die 6 and connected with all the main channels 604, that is, the auxiliary material in the fourth auxiliary material gates 607 is simultaneously supplied to all the main channels 604 to realize multi-cavity extrusion at the same time.

[0055] The core 608 is fixedly connected to the front and rear ends of the core fixing base 601, and the connection between the two ends is not completely closed, but leaves more space for the main material to pass through. Specifically, a cross groove can be opened on the end faces of the core fixing base 601, and the core 608 is fixedly connected to a long block at the corresponding positions of the front and rear ends of the core fixing base 601, and the long block is fixedly embedded in the cross grooves at both ends of the core fixing base 601.

[0056] When the multi-cavity composite extrusion mold is working, the main material enters the mold through the main channel 604, the auxiliary material enters the fourth auxiliary material distribution groove 606 from the fourth auxiliary material diversion port 605, and enters the main channel 604 through the fourth gate 607, and is compounded with the main material respectively, coated on the surface of the main material rubber, and then extruded from the molding die 603 through heating and vulcanization.

[0057] The multi-cavity composite extrusion die can not only realize the extrusion of various materials including shielding, wave absorbing, and IP protection, but also realize the extrusion of functional rubber strips with multiple materials composite or full coverage. The die design is simple, the composite extruded rubber is subject to small resistance, the extrusion pressure is greatly reduced, the number of extrusion cavities is large, the productivity is improved, and the process production cost is reduced. The use of this die can realize the technology of realizing multiple functions of a rubber strip at the same time.

[0058] The multifunctional speed measuring device 4 includes a workbench 401, a feed guide wheel 406, an upper grating 405 and a lower grating 409 are arranged at the front end of the workbench 401, the upper grating 405 and the lower grating 409 are respectively located at the upper and lower ends of the workbench 401, the feed guide wheel 406 is located at the front end of the two gratings, a speed measuring wheel 403 is arranged in the middle of the workbench 401, and a discharge guide wheel 407 is arranged at the rear end of the workbench 401. Among them, the speed measuring wheel 403 is a well-known device for measuring the displacement of the rubber strip. When the speed measuring wheel 403 rotates, the rubber strip pressed thereunder is forced to move. The two gratings are used to obtain the extrusion time of the rubber strip within a displacement. The grating is a well-known sensing device.

[0059] In order to leave space for the rubber strip to move, the multifunctional speed measuring device 4 adds the following structure: a first material trough 4010 is opened at the front end of the workbench 401, and the upper grating 405 and the lower grating 409 are respectively located at the upper and lower ends of the first material trough 4010.

[0060] In order to leave space for the rubber strip to move, the multifunctional speed measuring device 4 adds the following structure: a second material trough 4011 is set at the rear end of the workbench 401, and the second material trough 4011 is located at the front end of the discharge guide wheel 407.

[0061] In order to measure the surface resistance of the rubber strip, the multifunctional speed measuring device 4 is added with the following structure: a resistance testing device 404 is arranged on the workbench 401, and the resistance testing device 4 is a well-known resistance measuring device.

[0062] The multifunctional speed measuring device 4 is further refined as follows: a driving mechanism 4012 is arranged on the workbench 401, the driving mechanism 4012 is connected with the resistance testing device 404 and drives the resistance testing device 404 to rise and fall, and the driving mechanism 4012 can be a cylinder, a nut screw pair, etc. The driving mechanism 4012 drives the resistance testing device 404 to rise and fall, and the resistance testing device 404 presses on the rubber strip when descending, thereby realizing the measurement of resistance.

[0063] In order to keep the rubber strip stable when passing through the workbench 1, the multifunctional speed measuring device 4 adds the following structure: a positioning member 402 is set in the middle of the workbench 401, and the positioning member 402 has a long strip positioning groove 40200 that matches the shape of the rubber strip, and the shape of the positioning groove 40200 can be changed according to the shape of different elastic materials. Specifically, an installation groove 40100 is set on the workbench 401, and the positioning member 402 is installed on the installation groove 40100.

[0064] In order to better measure the speed of the rubber strip, the speed measuring wheel is further refined: there are two speed measuring wheels 403, which are respectively located at the front and rear ends of the positioning member 402.

[0065] In order to display the working status of the data measured by the device, the multifunctional speed measuring device 4 is added with the following structure: a display screen 408 is provided on the workbench 401 .

[0066] In order to alarm when the device exceeds the set range, the multifunctional speed measuring device 4 adds the following structure: an alarm is set on the display screen 408.

[0067] In order to transfer the rubber strip to the next station, the discharge guide wheel 7 is further refined: the discharge guide wheel 407 is a power-driven active wheel, while the feed guide wheel 406 is not powered, and the discharge guide wheel 407 is used to guide the rubber strip forward. A fixed groove 40100 is provided in the middle of the workbench 401, and the fixing part 402 is embedded in the fixed groove 40100. The fixing part 402 can be adjusted forward and backward. The fixing part 402 is a convex structure, and two speed measuring wheels 403 are respectively arranged at the front and rear ends of the fixing part 402. The arrangement order of each component is the feed guide wheel 406, the first material trough 4010, the speed measuring wheel 403, the fixing part 402, the resistance testing device 404, the speed measuring wheel 403, the second material trough 4011 and the discharge guide wheel 407.

[0068] The multifunctional speed measuring device 4 completes the entire testing process through a feed guide wheel (made of PTFE material), a speed measuring wheel (covered with a silicone sleeve), a positioning member, a powered discharge guide wheel (with a micro switch) and a known computer. The computer is electrically connected to the speed measuring wheel, two gratings, an extrusion molding device, a driving mechanism, and a resistance testing device.

[0069] When the rubber strip is stretched, the conductive property of the rubber strip is lost, so the extrusion speed cannot be detected using a traditional speed measuring device. The present invention can measure the extrusion speed without pulling.

[0070] The multifunctional speed measuring device 4 can be used for online monitoring of speed and surface resistance during the production of rubber strips, automatically detects and records the speed and surface resistance, and can be used for continuous production monitoring of various rubber strips.

[0071] Specific principle: When the rubber strip is extruded through the extrusion molding device, it naturally droops to the bottom of the first material trough 4010 through the feed guide wheel 406, and the lower grating 409 receives the induction and transmits a signal to the computer. The computer controls the speed measuring wheel 403 to start working, driving the rubber strip through the fixing piece 402, and finally reaches the power-generating discharge guide wheel 407. When the rubber strip is continuously pulled toward the rear end by the speed measuring wheel 403, the position of the rubber strip in the first material trough 4010 is continuously improved until the upper grating 405 is triggered. The upper grating 405 transmits a signal to the computer, and the computer controls the speed measuring wheel 403 to stop working. The timer in the computer starts timing, and the resistance testing device 4 falls to measure the surface resistance and records it in the computer. The extrusion molding device continuously extrude the rubber strip, and the rubber strip naturally droops to the first material trough again. The bottom of 4010 triggers the lower grating 409, which transmits a signal to the computer. The timer in the computer stops timing and records it in the computer as T1. The speed wheel 403 starts working until the speed wheel 403 stops working and measures the displacement of the rubber strip this time and records the running time as T2. In the above process, the timer records the extrusion time of the rubber strip, and the speed wheel measures the length of the rubber strip extruded during this extrusion time. The preset program V=S / (T1+T2) in the computer obtains the speed during this period of time. Finally, the measured data is displayed on the display screen 408. When the rubber strips at the rear end of the workbench 401 accumulate to a certain amount, the micro switch on the discharge guide wheel 407 is pressed down, and the discharge guide wheel 407 starts working to guide the rubber strip to the stainless steel cage for use in the next process. When the speed and surface resistance are out of tolerance, the alarm is activated to remind the workers to make adjustments to ensure the stability of the product.

[0072] The multifunctional speed measuring device 4 can monitor the speed and surface resistance of the rubber strip during production online, solving the problem that the rubber strip loses its electrical conductivity when stretched, and thus the extrusion speed cannot be detected using a traditional speed measuring device.

[0073] The specific setting method of this embodiment is as follows: the first precision extrusion extruder 1 is located at the rear end, the outlet end of the first precision extrusion extruder 1 is fixedly connected to the heating mold sleeve 3, the two second precision extrusion extruders 2 are located on both sides of the heating mold sleeve 3, the outlet end of the second precision extrusion extruder 2 is also fixedly connected to the heating mold sleeve 3, and the multifunctional speed measuring device 4 and the automatic winding device 5 are successively located at the front end of the heating mold sleeve 3.

[0074] A manufacturing method implemented by using the manufacturing device as described above comprises the following steps:

[0075] S1, mixing the raw materials of the rubber strip to obtain a rubber mix, wherein the rubber mix is ​​divided into a functional rubber mix as an auxiliary material and a silicone rubber mix as a main material;

[0076] S2, putting the silicone rubber mix into the first precision extrusion extruder 1 for continuous extrusion, and putting the functional rubber mix into two second precision extrusion extruders 2 for continuous extrusion;

[0077] S3, the silicone rubber compound extruded by the first precision extrusion extruder 1 enters the extrusion die 6 from the main channel 300 of the heating die 3, and the functional rubber compounds extruded by the two second precision extrusion extruders 2 enter the extrusion die 6 from the two side channels 301 of the heating die 3, and the functional rubber compounds and the silicone rubber compounds are extruded from the extrusion die 6 together;

[0078] S4, the semi-finished rubber strip extruded from the extrusion die 6 is inspected online by the multifunctional speed measuring device 4, and the semi-finished rubber strip after the inspection is wound on a disk by the automatic winding device 5;

[0079] S5, performing secondary vulcanization on the semi-finished product after coiling to obtain a functional rubber strip finished product.

[0080] As a further optimization of the above technical solution: the mixing of rubber strip raw materials is generally achieved by using an internal mixer and an open mixer. The mixing time of the internal mixer is 15-20 minutes, and the roller distance of the open mixer is 3-12mm after the material is discharged. After mixing for ten minutes, it is parked for standby use.

[0081] As a further optimization of the above technical solution: the specific operation of step S2 is to roll the mixed rubber and load it into a precision extrusion extruder respectively, and the extruder is equipped with an automatic extrusion speed control device.

[0082] As a further optimization of the above technical solution: the first precision extrusion extruder 1 is specifically a silicone rubber compound extruder, and the second precision extrusion extruder 2 is specifically a rubber compound extruder for electromagnetic shielding.

[0083] As a further optimization of the above technical solution: the rubber strip is continuously formed in the extrusion die 6 at one time, and the rubber strips extruded by the extrusion die can be 1-6, and a functional rubber strip of about 80-600m can be obtained. The heating method of the extrusion die 6 is to provide indirect heat transfer through the closely contacted heating die sleeve.

[0084] Further explanation of step S4: The extrusion speed, surface resistance, size, etc. of the rubber strip are monitored by the multifunctional speed measuring device 5 to ensure the accuracy of the extrusion speed, surface resistance, size, etc. of the functional rubber strip. The winding reel automatically takes up the wire and waits for secondary vulcanization.

[0085] Further explanation of step S5: After extrusion is completed, the semi-finished rubber strip is transferred to an oven, and the secondary vulcanization temperature is 180-220°C for 2-4 hours. The functional rubber strip semi-finished product is further cross-linked through secondary vulcanization to improve the mechanical properties and compression permanent deformation properties of the rubber strip.

[0086] As a further optimization of the above technical solution: the extrusion heating temperature in step S3 is 150-300° C.; the extrusion speed of the extrusion die 6 in step S3 is 0.3 m / min-0.7 m / min.

[0087] The functional rubber compound in this embodiment refers to a conventional rubber compound with functional materials, such as conductive rubber compound, wave-absorbing rubber compound, electromagnetic shielding rubber, etc. The functional rubber strip is the corresponding conductive rubber, wave-absorbing rubber, electromagnetic shielding rubber, etc. The rubber strip made by the above-mentioned manufacturing method is a double-layer fully covered rubber strip.

[0088] Example 2

[0089] A device for making a functional rubber strip comprises a first precision extrusion extruder 1 for mixing a main material, two second precision extrusion extruders 2 for mixing auxiliary materials, a heating die sleeve 3, a multifunctional speed measuring device 4 and an automatic winding device 5. The heating die sleeve 3 comprises a die sleeve main channel 300 for feeding the main material and two die sleeve side channels 301 for feeding the auxiliary materials, one in front and one in the back. The outlet end of the first precision extrusion extruder 1 is connected to the die sleeve main channel 300 of the heating die sleeve 3, and the outlet end of the second precision extrusion extruder 2 is connected to the die sleeve side channel 301 of the heating die sleeve 3. An extrusion die 6 is arranged in the die sleeve main channel 300, and a cavity 600 of the extrusion die 6 is connected to the die sleeve main channel 300 and the die sleeve side channel 301. The automatic winding device 5 is a conventional device, which is used to pull the extruded rubber strip forward and coil it. The multifunctional speed measuring device 4 is used to measure the speed of the passing rubber strip.

[0090] The heating mold sleeve 3 is provided with a cooling device, a heat insulating device and an independent heating device 7 from front to back. There are two independent heating devices 7, which are arranged on the outer wall of the heating mold sleeve 3 in a ring shape, and a heat insulating member 9 is arranged between adjacent independent heating devices 7. The two independent heating devices 7 wrap the corresponding parts of the outer wall of the heating mold sleeve 3. The outer wall of the corresponding part of the heating mold sleeve 3 is a cylindrical structure. The independent heating device 7 is a semicircular ring structure, and the semicircular structure can better match the shape of the heating mold sleeve 3. The independent heating device 7 is a copper block containing a heating resistance wire, and the heating resistance wire is embedded in the copper block or wound around the copper block. The heating resistance wire is connected to an external power supply to heat the rubber material in the mold.

[0091] The cooling device is a jacket 10 that is sleeved outside the heating mold sleeve 3. Two cooling water channels 11 are formed between the jacket 10 and the heating mold sleeve 3. Each cooling water channel 11 has a water inlet and a water outlet, that is, there is a partition in the middle of the jacket 10, which divides the internal space of the jacket 10 into two. Side inlets 1000 corresponding to the positions of the mold sleeve side channels 101 of the heating mold sleeve 3 are also opened on both sides of the jacket 10 for feeding auxiliary materials.

[0092] The heat insulating device is a heat insulating sleeve 12 sleeved on the outer wall of the heating mold sleeve 3. The heat insulating sleeve 12 and the heat insulating member 9 are made of heat insulating material, and the heat insulating material can preferably be heat insulating ceramics.

[0093] The heating mold sleeve 3 is provided with temperature detection holes 8 corresponding to the independent heating devices 7 one by one. The temperature detection holes 8 are used in conjunction with a temperature measuring device. The temperature measuring device can be a thermocouple probe. The temperature can be measured by inserting the probe into the temperature measuring hole 8.

[0094] The main body of the heating mold sleeve 3 is a tubular structure for installing the mold and setting up a cooling device, an insulating device and an independent heating device 7. The front end of the heating mold sleeve 3 has a flange structure, and four fixing holes 302 for connecting to the extruder are opened on the flange structure, which is specifically fixedly connected to the output end of the extruder by bolts.

[0095] When the heating mold sleeve 3 is working, the extrusion mold 6 is installed in the cavity of the heating mold sleeve 3, the extruder extrude, and water flows through the cooling water channel 11. There are two independent heating devices 7, one of which has a higher temperature and is responsible for heating the functional material, and the other independent heating device 7 has a slightly lower temperature and is responsible for heating the silicone material. In this way, different materials can be vulcanized and formed at the same time.

[0096] The heating die sleeve 3 is used in conjunction with the functional rubber strip extrusion die, which can not only realize the one-time extrusion of different types of rubber strips from the upper and lower parts of the die, but also has uniform temperature heating, good cooling effect, rubber raw materials are not easy to burn, energy consumption is greatly reduced, productivity is improved, and process production costs are reduced.

[0097] The extrusion die 6 of the present embodiment is a multi-cavity multi-layer composite extrusion die, including a core fixing base 601, a composite molding part 602 and a molding die 603 which are fixedly connected in sequence in front and back. A plurality of through main flow channels 604 are arranged on the core fixing base 601, the composite molding part 602 and the molding die 603. A core 608 is arranged through the main flow channel 604, and a gap is provided between the two for molding the rubber strip. The core 608 is fixedly connected to the core fixing base 601. The extrusion die 6 is provided with a first auxiliary mold 604 located on the same side in sequence from front to back. The material diversion port 6061, the first auxiliary material distribution groove 6091, the first auxiliary material gate 6081, the second auxiliary material diversion port 6062, the second auxiliary material distribution groove 6092 and the second auxiliary material gate 6082, the first auxiliary material diversion port 6061, the first auxiliary material distribution groove 6091 and the first auxiliary material gate 6081 are connected in sequence, the second auxiliary material diversion port 6062, the second auxiliary material distribution groove 6092 and the second auxiliary material gate 6092 are connected in sequence, the first auxiliary material gate 6081 and the second auxiliary material gate 6082 are connected with the main channel 604 respectively.

[0098] As an optimized structure of the present invention: the first auxiliary material diversion port 6061 is opened on the core fixed base 601, the first auxiliary material distribution groove 6091, the first auxiliary material gate 6081, the second auxiliary material diversion port 6062, and the second auxiliary material distribution groove 6092 are all opened on the composite molded part, and the second auxiliary material gate 6082 is opened at the front end of the molding die 603.

[0099] As an optimized structure of the present invention: the composite molded part 602 includes a first composite molded part 6022, a second composite molded part 6023 and a third composite molded part 6024 which are fixedly connected in sequence front and back, a first auxiliary material distribution groove 6091 is opened in the first composite molded part 6022, a first auxiliary material gate 6081 and a second auxiliary material diversion port 6062 are opened in the second composite molded part 6023, and a second auxiliary material distribution groove 6092 is opened in the third composite molded part 604.

[0100] As an optimized structure of the present invention: the second composite molded part 603 is provided with a first sharp corner 6032 at the inner end of the first auxiliary material gate 6081 to narrow the connecting opening between the first auxiliary material gate 6081 and the main channel 604, and the molding die 603 is provided with a second sharp corner 6051 at the end of the second auxiliary material gate 6082 to narrow the connecting opening between the second auxiliary material gate 6082 and the main channel 604.

[0101] As an optimized structure of the present invention: the core fixing base 601, the first composite molded part 6022, the second composite molded part 6023, the third composite molded part 6024 and the molding die 603 are fixedly connected by positioning pins, and the positioning pins can be set to different diameters to prevent the mold from being installed incorrectly.

[0102] As an optimized structure of the present invention: the first auxiliary material diversion port 6061 and the second auxiliary material diversion port 6062 are both L-shaped structures, which can play a role in guiding the auxiliary materials.

[0103] As an optimized structure of the present invention: a contraction ramp 6033 for evenly distributing pressure is provided in the first auxiliary material distribution groove 6091 and the second auxiliary material distribution groove 6092.

[0104] As an optimized structure of the present invention, there are 2 to 6 main channels 604, preferably 4.

[0105] As an optimized structure of the present invention: the first auxiliary material diversion port 6061, the first auxiliary material distribution groove 6091, the first auxiliary material pouring 6081, the second auxiliary material diversion port 6062, the second auxiliary material distribution groove 6092 and the second auxiliary material pouring port 6082 are all provided with one, the first auxiliary material diversion port 6061 and the second auxiliary material diversion port 6062 are located on different sides of the extrusion die 6, and the first auxiliary material pouring port 6081 and the second auxiliary material diversion port 6062 are located on the same side of the extrusion die. The first auxiliary material pouring port 6081 and the second auxiliary material pouring port 6082 are connected with the main flow channel 604, that is, the auxiliary materials in the first auxiliary material pouring port 6081 and the second auxiliary material pouring port 6082 are simultaneously supplied to all the main flow channels 604, so as to realize multi-hole simultaneous extrusion.

[0106] In the present invention, the core 608 is fixedly connected to the front and rear ends of the core fixing base 601, and the connection between the two ends is not completely closed, but leaves more space for the main material to pass through. Specifically, a cross groove can be opened on the end faces of the core fixing base 601 at both ends, and the core 608 is fixedly connected to a long block at the corresponding positions at the front and rear ends of the core fixing base 1, and the long block is fixedly embedded in the cross grooves at both ends of the core fixing base 1.

[0107] During operation, the main material enters the extrusion die 6 through the main channel 604, and two different auxiliary materials enter the first auxiliary material distribution groove 6091 and the second auxiliary material distribution groove 6092 from the first auxiliary material diversion port 6061 and the second auxiliary material diversion port 6062 respectively, and enter the main channel 604 through the first auxiliary material gate 6081 and the second auxiliary material gate 6082 respectively, and are compounded with the main material respectively, coated on the surface of the main material rubber to form a multi-layer structure, and then extruded from the molding die 603 through heating and vulcanization.

[0108] The above extrusion die can not only realize the extrusion of various materials including shielding, wave absorbing, and IP protection, but also realize the extrusion of functional rubber strips composited with multiple materials, especially the simultaneous extrusion of multiple holes of multi-layered rubber strips. The die design is simple, the resistance of the composite extruded rubber is small, the extrusion pressure is greatly reduced, the number of extrusion holes is large, the productivity is improved, and the process production cost is reduced. The use of this die can realize the technology of realizing multiple functions of a rubber strip at the same time.

[0109] The multifunctional speed measuring device 4 includes a workbench 401, a feed guide wheel 406, an upper grating 405 and a lower grating 409 are arranged at the front end of the workbench 401, the upper grating 405 and the lower grating 409 are respectively located at the upper and lower ends of the workbench 401, the feed guide wheel 406 is located at the front end of the two gratings, a speed measuring wheel 403 is arranged in the middle of the workbench 401, and a discharge guide wheel 407 is arranged at the rear end of the workbench 401. Among them, the speed measuring wheel 403 is a well-known device for measuring the displacement of the rubber strip. When the speed measuring wheel 403 rotates, the rubber strip pressed thereunder is forced to move. The two gratings are used to obtain the extrusion time of the rubber strip within a displacement. The grating is a well-known sensing device.

[0110] In order to leave space for the rubber strip to move, the multifunctional speed measuring device 4 adds the following structure: a first material trough 4010 is opened at the front end of the workbench 401, and the upper grating 405 and the lower grating 409 are respectively located at the upper and lower ends of the first material trough 4010.

[0111] In order to leave space for the rubber strip to move, the multifunctional speed measuring device 4 adds the following structure: a second material trough 4011 is set at the rear end of the workbench 401, and the second material trough 4011 is located at the front end of the discharge guide wheel 407.

[0112] In order to measure the surface resistance of the rubber strip, the multifunctional speed measuring device 4 is added with the following structure: a resistance testing device 404 is arranged on the workbench 401, and the resistance testing device 4 is a well-known resistance measuring device.

[0113] The multifunctional speed measuring device 4 is further refined as follows: a driving mechanism 4012 is arranged on the workbench 401, the driving mechanism 4012 is connected with the resistance testing device 404 and drives the resistance testing device 404 to rise and fall, and the driving mechanism 4012 can be a cylinder, a nut screw pair, etc. The driving mechanism 4012 drives the resistance testing device 404 to rise and fall, and the resistance testing device 404 presses on the rubber strip when descending, thereby realizing the measurement of resistance.

[0114] In order to keep the rubber strip stable when passing through the workbench 1, the multifunctional speed measuring device 4 adds the following structure: a positioning member 402 is set in the middle of the workbench 401, and the positioning member 402 has a long strip positioning groove 40200 that matches the shape of the rubber strip, and the shape of the positioning groove 40200 can be changed according to the shape of different elastic materials. Specifically, an installation groove 40100 is set on the workbench 401, and the positioning member 402 is installed on the installation groove 40100.

[0115] In order to better measure the speed of the rubber strip, the speed measuring wheel is further refined: there are two speed measuring wheels 403, which are respectively located at the front and rear ends of the positioning member 402.

[0116] In order to display the working status of the data measured by the device, the multifunctional speed measuring device 4 is added with the following structure: a display screen 408 is provided on the workbench 401 .

[0117] In order to alarm when the device exceeds the set range, the multifunctional speed measuring device 4 adds the following structure: an alarm is set on the display screen 408.

[0118] In order to transfer the rubber strip to the next station, the discharge guide wheel 7 is further refined: the discharge guide wheel 407 is a power-driven active wheel, while the feed guide wheel 406 is not powered, and the discharge guide wheel 407 is used to guide the rubber strip forward. A fixed groove 40100 is provided in the middle of the workbench 401, and the fixing part 402 is embedded in the fixed groove 40100. The fixing part 402 can be adjusted forward and backward. The fixing part 402 is a convex structure, and two speed measuring wheels 403 are respectively arranged at the front and rear ends of the fixing part 402. The arrangement order of each component is the feed guide wheel 406, the first material trough 4010, the speed measuring wheel 403, the fixing part 402, the resistance testing device 404, the speed measuring wheel 403, the second material trough 4011 and the discharge guide wheel 407.

[0119] The multifunctional speed measuring device 4 completes the entire testing process through a feed guide wheel (made of PTFE material), a speed measuring wheel (covered with a silicone sleeve), a positioning member, a powered discharge guide wheel (with a micro switch) and a known computer. The computer is electrically connected to the speed measuring wheel, two gratings, an extrusion molding device, a driving mechanism, and a resistance testing device.

[0120] When the rubber strip is stretched, the conductive property of the rubber strip is lost, so the extrusion speed cannot be detected using a traditional speed measuring device. The present invention can measure the extrusion speed without pulling.

[0121] The multifunctional speed measuring device 4 can be used for online monitoring of speed and surface resistance during the production of rubber strips, automatically detects and records the speed and surface resistance, and can be used for continuous production monitoring of various rubber strips.

[0122] Specific principle: When the rubber strip is extruded through the extrusion molding device, it naturally droops to the bottom of the first material trough 4010 through the feed guide wheel 406, and the lower grating 409 receives the induction and transmits a signal to the computer. The computer controls the speed measuring wheel 403 to start working, driving the rubber strip through the fixing piece 402, and finally reaches the power-generating discharge guide wheel 407. When the rubber strip is continuously pulled toward the rear end by the speed measuring wheel 403, the position of the rubber strip in the first material trough 4010 is continuously improved until the upper grating 405 is triggered. The upper grating 405 transmits a signal to the computer, and the computer controls the speed measuring wheel 403 to stop working. The timer in the computer starts timing, and the resistance testing device 4 falls to measure the surface resistance and records it in the computer. The extrusion molding device continuously extrude the rubber strip, and the rubber strip naturally droops to the first material trough again. The bottom of 4010 triggers the lower grating 409, which transmits a signal to the computer. The timer in the computer stops timing and records it in the computer as T1. The speed wheel 403 starts working until the speed wheel 403 stops working and measures the displacement of the rubber strip this time and records the running time as T2. In the above process, the timer records the extrusion time of the rubber strip, and the speed wheel measures the length of the rubber strip extruded during this extrusion time. The preset program V=S / (T1+T2) in the computer obtains the speed during this period of time. Finally, the measured data is displayed on the display screen 408. When the rubber strips at the rear end of the workbench 401 accumulate to a certain amount, the micro switch on the discharge guide wheel 407 is pressed down, and the discharge guide wheel 407 starts working to guide the rubber strip to the stainless steel cage for use in the next process. When the speed and surface resistance are out of tolerance, the alarm is activated to remind the workers to make adjustments to ensure the stability of the product.

[0123] The multifunctional speed measuring device 4 can monitor the speed and surface resistance of the rubber strip during production online, solving the problem that the rubber strip loses its electrical conductivity when stretched, and thus the extrusion speed cannot be detected using a traditional speed measuring device.

[0124] The specific setting method of this embodiment is as follows: the first precision extrusion extruder 1 is located at the rear end, the outlet end of the first precision extrusion extruder 1 is fixedly connected to the heating mold sleeve 3, and two second precision extrusion extruders 2 are located on both sides of the heating mold sleeve 3 one after the other, and the outlet ends of the second precision extrusion extruders 2 are also fixedly connected to the heating mold sleeve 3, and the outlet end of one of the second precision extrusion extruders 2 is connected to the first auxiliary material diversion port 6061 of the extrusion mold 6, and the outlet end of the other second precision extrusion extruder 2 is connected to the second auxiliary material diversion port 6062 of the extrusion mold 6, and the multifunctional speed measuring device 4 and the automatic winding device 5 are successively located at the front end of the heating mold sleeve 3.

[0125] The heating mold sleeve 3 and the multifunctional speed measuring device 4 in Example 2 refer to the corresponding drawings of Example 1.

[0126] A manufacturing method implemented by using the manufacturing device as described above comprises the following steps:

[0127] S1, mixing the raw materials of the rubber strip to obtain a rubber mix, wherein the rubber mix is ​​divided into two functional rubber mixes as auxiliary materials and a silicone rubber mix as a main material;

[0128] S2, putting the silicone rubber mix into the first precision extrusion extruder 1 for continuous extrusion, and putting the two different functional rubber mixes into two second precision extrusion extruders 2 for continuous extrusion;

[0129] S3, the silicone rubber compound extruded by the first precision extrusion extruder 1 enters the extrusion die 6 from the main channel 300 of the heating die 3, and the functional rubber compounds extruded by the two second precision extrusion extruders 2 enter the extrusion die 6 from the two side channels 301 of the heating die 3 respectively, and the functional rubber compound and the two silicone rubber compounds are extruded from the extrusion die 6 together;

[0130] S4, the semi-finished rubber strip extruded from the extrusion die 6 is inspected online by the multifunctional speed measuring device 4, and the semi-finished rubber strip after the inspection is wound on a disk by the automatic winding device 5;

[0131] S5, performing secondary vulcanization on the semi-finished product after coiling to obtain a functional rubber strip finished product.

[0132] As a further optimization of the above technical solution: the mixing of rubber strip raw materials is generally achieved by using an internal mixer and an open mixer. The mixing time of the internal mixer is 15-20 minutes, and the roller distance of the open mixer is 3-12mm after the material is discharged. After mixing for ten minutes, it is parked for standby use.

[0133] As a further optimization of the above technical solution: the specific operation of step S2 is to roll the mixed rubber and load it into a precision extrusion extruder respectively, and the extruder is equipped with an automatic extrusion speed control device.

[0134] As a further optimization of the above technical solution: the first precision extrusion extruder 1 is specifically a silicone rubber compound extruder, and the second precision extrusion extruder 2 is specifically a rubber compound extruder for electromagnetic shielding.

[0135] As a further optimization of the above technical solution: the rubber strip is continuously formed in the extrusion die 6 at one time, and the rubber strips extruded by the extrusion die can be 1-6, and a functional rubber strip of about 80-600m can be obtained. The heating method of the extrusion die 6 is to provide indirect heat transfer through the closely contacted heating die sleeve.

[0136] Further explanation of step S3: the functional rubber compound extruded by one of the second precision extrusion extruders 2 enters the extrusion die 6 from the first auxiliary material diversion port 6061 of the extrusion die 6, and another functional rubber compound extruded by another second precision extrusion extruder 2 enters the extrusion die from the second auxiliary material diversion port 6062 of the extrusion die 6, and the two functional rubber compounds are extruded from the extrusion die 6 together with the silicone rubber compound to form a three-layer rubber strip. During the extrusion process, since in the heating die sleeve 3, the temperature of an independent heating device 7 is higher, which is responsible for heating the functional rubber compound, and the temperature of the other independent heating device 7 is slightly lower, which is responsible for heating the silicone rubber compound, so that different materials can be vulcanized and formed at the same time.

[0137] Further explanation of step S4: The extrusion speed, surface resistance, size, etc. of the rubber strip are monitored by the multifunctional speed measuring device 5 to ensure the accuracy of the extrusion speed, surface resistance, size, etc. of the functional rubber strip. The winding reel automatically takes up the wire and waits for secondary vulcanization.

[0138] Further explanation of step S5: After extrusion is completed, the semi-finished rubber strip is transferred to an oven, and the secondary vulcanization temperature is 180-220°C for 2-4 hours. The functional rubber strip semi-finished product is further cross-linked through secondary vulcanization to improve the mechanical properties and compression permanent deformation properties of the rubber strip.

[0139] As a further optimization of the above technical solution: the extrusion heating temperature in step S3 is 150-300° C.; the extrusion speed of the extrusion die 6 in step S3 is 0.3 m / min-0.7 m / min.

[0140] The functional rubber compound in this embodiment refers to a conventional rubber compound with functional materials, such as conductive rubber compound, wave-absorbing rubber compound, electromagnetic shielding rubber, etc. The functional rubber strip is a conventional rubber with functional materials, such as conductive rubber, wave-absorbing rubber, and electromagnetic shielding rubber, etc. The rubber strip made by the manufacturing method of Example 2 is a three-layer non-coated rubber strip.

[0141] The functional rubber strip manufacturing device of the present invention realizes continuous and stable extrusion of the functional rubber strip by changing the extrusion die and the temperature difference between the upper and lower parts of the heating die sleeve. The device can achieve the effects of stable process, accurate size, high production efficiency, and sufficient cross-linking to ensure one-time continuous molding.

[0142] The functional rubber strip manufacturing method of the present invention is suitable for extruding a variety of functional materials at the same time by changing the materials and the molds, and has stable process, precise size, high production efficiency, and sufficient cross-linking to ensure one-time continuous molding.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for making a functional rubber strip, characterized in that The invention comprises a first precision extrusion extruder (1) for mixing a main material, a second precision extrusion extruder (2) for mixing an auxiliary material, a heating mold sleeve (3), a multifunctional speed measuring device (4) and an automatic winding device (5), wherein the heating mold sleeve (3) comprises a mold sleeve main channel (300) for feeding the main material and a mold sleeve side channel (301) for feeding the auxiliary material, the outlet end of the first precision extrusion extruder (1) is connected to the mold sleeve main channel (300) of the heating mold sleeve (3), the outlet end of the second precision extrusion extruder (2) is connected to the mold sleeve side channel (301) of the heating mold sleeve (3), an extrusion mold (6) is arranged in the mold sleeve main channel (300), the cavity (600) of the extrusion mold (6) is connected to the mold sleeve main channel (300) and the mold sleeve side channel (301), the automatic winding device (5) is used to pull the extruded rubber strip forward and wind it around a coil, and the multifunctional speed measuring device (4) is used to measure the speed of the passing rubber strip; A cooling device, a heat insulating device and an independent heating device (7) are arranged on the heating mold sleeve (3) in sequence from front to back. There are at least two independent heating devices (7) which are arranged in a ring on the outer wall of the heating mold sleeve (3). A heat insulating member (9) is arranged between adjacent independent heating devices (7); Two independent heating devices (7) are arranged outside the heating mold sleeve (3), and the independent heating devices (7) are semicircular ring structures. The two independent heating devices (7) cover the corresponding parts of the outer wall of the heating mold sleeve (3); the independent heating devices (7) are copper blocks containing heating resistance wires; the cooling device is a jacket (10) sleeved outside the heating mold sleeve (3), and a cooling water channel (11) is formed between the jacket (10) and the heating mold sleeve (3); the heat insulation device is a heat insulation sleeve (12) sleeved on the outer wall of the heating mold sleeve (3); The multifunctional speed measuring device comprises a workbench (401), wherein a feed guide wheel (406), an upper grating (405) and a lower grating (409) are arranged at the front end of the workbench (401), wherein the upper grating (405) and the lower grating (409) are respectively located at the upper and lower ends of the workbench (401), a speed measuring wheel (403) is arranged in the middle of the workbench (401), and a discharge guide wheel (407) is arranged at the rear end of the workbench (401).

2. The device for making a functional rubber strip according to claim 1, characterized in that The extrusion die (6) comprises a core fixing base (601), a composite molding part (602) and a molding die (603) which are fixedly connected in sequence in front and back. A plurality of main flow channels (604) are arranged on the core fixing base (601), the composite molding part (602) and the molding die (603). A core (608) is arranged in the main flow channel (604). A gap is provided between the two for molding the rubber strip. The core (608) is fixedly connected to the core fixing base (601). A fourth auxiliary material diversion port (605) corresponding to the die sleeve side channel (301) is provided on one side or both sides of the extrusion die (6). A fourth auxiliary material distribution groove (606) connected to the fourth auxiliary material diversion port (605) and a fourth auxiliary material gate (607) connected to the fourth auxiliary material distribution groove (606) are provided in the extrusion die. The fourth auxiliary material gate (607) is located at the front end of the molding die (603) and is connected to the main flow channel (604).

3. The device for making a functional rubber strip according to claim 1, characterized in that The extrusion die (6) comprises a core fixing base (601), a composite molding part (602) and a molding die (603) which are fixedly connected in sequence from front to back; a plurality of main flow channels (604) are arranged on the core fixing base (601), the composite molding part (602) and the molding die (603); a core (608) is arranged in the main flow channel (604); a gap is provided between the two for molding the rubber strip; the core (608) is fixedly connected to the core fixing base (601); and the extrusion die (6) is provided with a first auxiliary material diversion port (6061), a second auxiliary material diversion port (6062) and a third auxiliary material diversion port (6063) in sequence from front to back. An auxiliary material distribution groove (6091), a first auxiliary material gate (6081), a second auxiliary material diversion port (6062), a second auxiliary material distribution groove (6092) and a second auxiliary material gate (6082); the first auxiliary material diversion port (6061), the first auxiliary material distribution groove (6091) and the first auxiliary material gate (6081) are connected in sequence; the second auxiliary material diversion port (6062), the second auxiliary material distribution groove (6092) and the second auxiliary material gate (6082) are connected in sequence; the first auxiliary material gate (6081) and the second auxiliary material gate (6082) are respectively connected to the main channel (604).

4. A method for producing a product using the production device as claimed in any one of claims 1 to 3, characterized in that The following steps are involved: S1, mixing the raw materials of the rubber strip to obtain a mixed rubber; S2, putting the mixed rubber into a precision extrusion extruder for continuous extrusion; S3, the rubber material extruded by the precision extrusion extruder enters into a heating mold sleeve (3) having an extrusion mold (6) for extrusion; S4, the semi-finished rubber strip extruded from the extrusion die (6) is inspected online by a multifunctional speed measuring device (4), and the semi-finished rubber strip after the inspection is wound on a reel by an automatic winding device (5); S5, performing secondary vulcanization on the semi-finished product after coiling to obtain a functional rubber strip finished product.

5. The method for making a functional rubber strip according to claim 4, characterized in that In step S1, the rubber mixture is divided into a silicone rubber mixture and a functional rubber mixture; step S2 specifically comprises: the silicone rubber mixture and the functional rubber mixture are extruded respectively by a precision extrusion extruder; and step S3 specifically comprises: the silicone rubber mixture extruded by the precision extrusion extruder enters from the main flow channel (604) of the extrusion die (6), the functional rubber mixture enters from the auxiliary material diversion port of the extrusion die (6), and the functional rubber mixture and the silicone rubber mixture are extruded together.

6. The method for making a functional rubber strip according to claim 5, characterized in that The functional rubber compound is extruded by one or two electromagnetic shielding rubber compound extruders, and the silicone rubber compound is extruded by one silicone rubber compound extruder.

7. A method for manufacturing a functional rubber strip according to any one of claims 4 to 6, characterized in that The extrusion heating temperature in step S3 is 150-300° C.; the extrusion speed of the extrusion die (6) in step S3 is 0.3 m / min-0.7 m / min; the secondary vulcanization temperature in step S5 is 180-220° C. and the time is 2-4 h.

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