CN109723820B - Skeleton rubber sealing ring and production die thereof - Google Patents
Skeleton rubber sealing ring and production die thereof Download PDFInfo
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- CN109723820B CN109723820B CN201910057480.8A CN201910057480A CN109723820B CN 109723820 B CN109723820 B CN 109723820B CN 201910057480 A CN201910057480 A CN 201910057480A CN 109723820 B CN109723820 B CN 109723820B
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- 238000007789 sealing Methods 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 141
- 239000002184 metal Substances 0.000 claims abstract description 141
- 229910000737 Duralumin Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 15
- 238000004073 vulcanization Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010068 moulding (rubber) Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000012797 qualification Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- 238000013040 rubber vulcanization Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention belongs to the technical field of sealing rings, and provides a skeleton rubber sealing ring which comprises an annular metal skeleton, wherein the annular metal skeleton comprises a first inclined part, a second vertical part and a third inclined part, the inner diameter of the first inclined part is gradually reduced from top to bottom, the inner diameter of the second vertical part is kept unchanged, the inner diameter of the third inclined part is gradually increased from top to bottom, a first rubber ring is arranged on the first inclined part, the first rubber ring is in a taper sleeve shape, a second rubber ring is arranged on the outer wall of the annular metal skeleton, the invention also provides a skeleton rubber sealing ring production mould, which comprises an upper template and a lower template, a first cavity is formed between the upper template and the lower template, a mould cavity for accommodating the skeleton rubber sealing ring is formed between the upper template, the lower template and the mould core, the mould core comprises a metal cap and a lower mould core, and the metal cap is in threaded connection with the lower mould core. Through the technical scheme, the invention solves the problems of poor tightness, low efficiency and high processing cost in the production process of the framework rubber sealing ring in the prior art.
Description
Technical Field
The invention belongs to the technical field of sealing rings, and relates to a skeleton rubber sealing ring and a production die thereof.
Background
The skeleton rubber sealing ring product is widely applied to sealing of pneumatic brake pipeline joints of brake systems of vehicles such as rail trains, ships and the like.
Before such seals, china mostly relied on import. In recent two years, china starts to take the problem as a technological research and development project to realize domestic transformation. At present, a plurality of domestic enterprises and scientific research institutions have developed a processing method of the product for more than 2 years, the existing processing die of the skeleton rubber sealing ring comprises an upper die plate, a lower die plate and a die core, when the processing die is used for processing, rubber raw materials and skeleton metal rings are subjected to pressure and temperature on the die through a heating plate of a flat vulcanizing machine under the constraint of the die, the rubber is subjected to vulcanization crosslinking reaction in a die cavity and is bonded with the skeleton metal rings, and after vulcanization is completed, the die is opened to take out the product. Because of the machining precision limitation of skeleton metal ring and mold core, two kinds of problems can appear in the reality production: firstly, the skeleton metal ring and mold core interference fit lead to damage mold core, drawing of patterns difficulty, secondly, the clearance is too big between skeleton metal ring and the mold core for skeleton metal ring inner wall glue spilling, the later manufacture procedure is handled difficultly, consequently, the processing degree of difficulty is big, the defective rate is high and the productivity is low, and traditional skeleton rubber sealing ring appears deformation easily in the in-process of repeatedly used, non-skid phenomenon leads to the leakproofness poor moreover.
Disclosure of Invention
The invention provides a framework rubber sealing ring and a production die thereof, which solve the problem of poor tightness of the framework rubber sealing ring in the prior art.
The technical scheme of the invention is realized as follows:
the utility model provides a skeleton rubber sealing ring, includes annular metal skeleton, annular metal skeleton includes the inside diameter from top to bottom three parts that change in proper order, is the first tilting portion that the inside diameter from top to bottom gradually reduces, the inside diameter keeps unchangeable second vertical portion, the inside diameter from top to bottom gradually increases third tilting portion, be provided with first rubber circle on the first tilting portion, first rubber circle is taper sleeve shape, be provided with the second rubber circle on the annular metal skeleton outer wall.
As a further technical scheme, be provided with the extension on the first rubber ring, the extension is wrapped around the second vertical portion.
As a further technical scheme, the upper end and the lower end of the annular metal framework are respectively provided with a chamfer, the second rubber ring is coated on the chamfer, the annular metal framework further comprises a fourth vertical part with the inner diameter kept unchanged, the fourth vertical part is arranged at the lower part of the third inclined part, the included angle between the upper end face of the annular metal framework and a bus of the first rubber ring is 95-130 degrees, the included angle between the upper end face of the annular metal framework and the first inclined part is 130-175 degrees, the included angle between the upper end face of the annular metal framework and the third inclined part is 60-80 degrees, and the length ratio of the third inclined part to the first inclined part is 3-5: 1.
the utility model provides a skeleton rubber sealing ring production mould, includes cope match-plate pattern, lower bolster, the cope match-plate pattern with form first cavity between the lower bolster, be provided with the mold core in the first cavity, the cope match-plate pattern the lower bolster with form the die cavity that is used for holding skeleton rubber sealing ring between the mold core, the mold core includes metal cap and lower mold core, the metal cap with lower mold core dismantles and is connected.
As a further technical scheme, the mold core is cylindrical, the mold core comprises five parts with the outer diameters being changed from top to bottom in sequence, a fifth inclined part with the outer diameters being gradually increased from top to bottom, a sixth vertical part with the outer diameters being unchanged, a seventh inclined part with the outer diameters being gradually increased from top to bottom, an eighth vertical part with the outer diameters being unchanged, and a ninth vertical part, the outer diameters of the eighth vertical part are larger than the outer diameters of the ninth vertical part, when the mold core works, the outer walls of the fifth inclined part and the sixth vertical part are in contact with the first rubber ring, the outer walls of the seventh inclined part are in contact with the annular metal framework, and the outer walls of the eighth vertical part are in contact with the annular metal framework.
As a further technical scheme, the mold core is a magnetic mold core, and the mold core and the annular metal framework are adsorbed by magnetism.
As a further technical scheme, an annular groove is formed in the seventh inclined portion, an annular rubber gasket used for forming buffering at the contact position of the mold core and the annular metal framework is filled in the annular groove, and the annular rubber gasket is in contact with the first rubber ring.
As a further technical scheme, the material of the mold core is duralumin A7075, and the material of the annular metal framework 1 is cemented carbide steel V40.
As a further technical scheme, one end of the mold core, which is close to the upper mold plate, is provided with a first magnet, one end of the mold core, which is close to the lower mold plate, is provided with a second magnet, a third magnet used for enabling the mold core and the upper mold plate to be close to each other is arranged in the upper mold plate, and a fourth magnet used for enabling the mold core and the lower mold plate to be far away from each other is arranged in the lower mold plate.
As a further technical scheme, a pressure-relieving spring is arranged between the mold core and the lower mold plate, and when the mold core is jacked up by the pressure-relieving spring, a gap is formed between the mold core and the lower mold plate.
The invention has the following using principle and beneficial effects:
the production die of the skeleton rubber sealing ring is simple in structure and reasonable in design, so that in the production of the skeleton rubber sealing ring, the production efficiency is improved from 6 dies/hour to more than 10 dies/hour, the product percent of pass is improved from 70% to more than 90%, the die core cost is uniformly reduced from 4 yuan/each to less than 1 yuan/each, the production efficiency and the product percent of pass of the skeleton rubber sealing ring are greatly improved while the cost is saved, and the problems that a die core is easy to damage and the inner side wall of a skeleton metal ring overflows in the production process of the skeleton rubber sealing ring in the prior art are effectively solved, so that the production die is suitable for large-scale popularization and use.
According to the invention, when the pneumatic brake pipeline joint is used, the framework rubber sealing ring is arranged at the pneumatic brake pipeline joint, the annular metal framework plays a supporting role, the stability of the framework rubber sealing ring structure is improved, the arrangement of the first rubber ring and the second rubber ring plays a double-layer sealing role, the tightness of the framework rubber sealing ring is improved, the first rubber ring is of a taper sleeve type, the upper part is small, the lower part is large, the framework rubber sealing ring is convenient to be arranged at the pneumatic brake pipeline joint, and the practicability is high. The annular metal framework comprises a first inclined part, a second vertical part and a third inclined part, wherein the inner diameter of the first inclined part is gradually reduced from top to bottom, the inner diameter of the second vertical part is kept unchanged, the inner diameter of the third inclined part is gradually increased from top to bottom, the inclined surface of the first inclined part is arranged to enable the contact area between the annular metal framework and the first rubber ring to be larger, when the framework rubber sealing ring is used, acting force is applied to the annular metal framework at a pipeline joint, the annular metal framework not only generates axial acting force on the first rubber ring, but also generates radial acting force, so that the annular metal framework is combined with the first rubber ring more tightly, the service life of the framework rubber sealing ring is reduced by effectively preventing the annular metal framework from cracking at the intersection of the annular metal framework and the first rubber ring, and the practicability and the service life of the framework rubber sealing ring are improved.
According to the invention, the second vertical part is wrapped by the extension part arranged on the first rubber ring, when acting force is applied to the annular metal framework at the pipeline joint, the extension part can play a role in buffering, so that abrasion of the annular metal framework is reduced, meanwhile, the extension part wraps the second vertical part, a sleeved object is prevented from being in direct contact with the second vertical part, the anti-skid effect is enhanced, meanwhile, the first inclined part and the second vertical part form an obtuse angle, axial acting force is applied to the first rubber ring, so that the extension part and the pipeline joint inside the first rubber ring are tightly attached, the sealing effect of the framework rubber sealing ring is improved, and the service life, the anti-skid property and the sealing effect of the framework rubber sealing ring are prolonged.
In the invention, the chamfers are arranged at the upper end and the lower end of the annular metal framework, so that the contact area between the annular metal framework and the second rubber ring is increased, the second rubber ring can well wrap and clamp the annular metal framework, and the sealing performance of the framework rubber sealing ring is better when the framework rubber sealing ring is used.
In the invention, when the framework rubber sealing ring is produced, firstly, an annular metal framework is placed in a die cavity to be in contact with a die core, an upper die plate and a lower die plate are combined, rubber raw materials are injected into the die cavity, pressure and temperature are applied to the upper die plate and the lower die plate through a heating plate of a flat vulcanizing machine, vulcanization crosslinking reaction is carried out on rubber in the die cavity, the rubber is bonded with the framework metal ring, after vulcanization is finished, the die is opened, a product is taken out, in the production process of the framework rubber sealing ring, friction exists between the die core and the upper die plate and between the die core and the annular metal framework because the heating plate of the flat vulcanizing machine applies pressure to the upper die plate, the die core and the annular metal framework are easy to wear, the die core is divided into two parts, the upper half part easy to wear is a replaceable metal cap, and the upper half part easy to wear can be directly replaced after the metal cap is worn, so that the replacement cost is saved, and the technical problem that the die core is hard to wear and needs to be replaced when the framework rubber sealing ring is produced is solved.
According to the invention, the mold core comprises a fifth inclined part with the outer diameter gradually increased from top to bottom, a sixth vertical part with the outer diameter unchanged, a seventh inclined part with the outer diameter gradually increased from top to bottom, an eighth vertical part with the outer diameter unchanged and a ninth vertical part, and the arrangement of the outer diameter changes, so that the mold core can well correspond to the size of the skeleton rubber sealing ring, the size of the skeleton rubber sealing ring is convenient to precisely control, the qualification rate of the produced skeleton rubber sealing ring product is improved from 70% to more than 90%, the yield of the skeleton rubber sealing ring is greatly improved, and the glue overflow phenomenon on the inner side wall of the skeleton metal ring in the production process is reduced.
In the invention, the mold core is a magnetic mold core, and the annular metal framework and the mold core are combined together through magnetic adsorption before the vulcanization molding processing of rubber, so that the phenomenon of rubber overflow in the production process of the framework rubber sealing ring is avoided, and meanwhile, the combined body and the upper mold plate form a closed cavity for rubber molding, so that the pressure transmitted by the lower mold plate to the mold core is removed, and the abrasion of the mold core is reduced.
The problem frequently encountered in actual production is that when the annular metal framework is sleeved on the mold core, collision and friction are generated between the annular metal framework and the mold core, so that the mold core is damaged, even slight deformation or abrasion can cause mismatching of the mold core and the annular metal framework, thereby causing improvement of defective rate, therefore, the mold core needs to be frequently replaced, in the embodiment, the seventh inclined part of the mold core, which is in direct contact with the annular metal framework, is provided with the annular groove and is filled with the annular rubber gasket, the annular rubber gasket is designed to be slightly higher than the annular groove, the annular rubber gasket can well reduce collision, thereby well solving the problem that the seventh inclined part of the mold core, which is in contact with the third inclined part of the annular metal framework, is easy to suffer collision damage, after the design of the annular groove and the annular rubber gasket is added, new problem is encountered in production, namely that the annular rubber gasket has a hard satisfactory collision preventing effect, the inventor finally designs the annular rubber gasket to comprise an anti-collision part extending out of the annular groove and a plugging part for plugging into the annular groove, the anti-collision part is only slightly higher, the anti-collision effect is achieved, the anti-collision part is pressed into the annular groove when the first inclined part and the seventh inclined part are contacted and adhered, so that the anti-collision effect is good, overflow or deflection of rubber in a die cavity is avoided when the rubber is vulcanized and crosslinked due to size deviation when the die core and the annular rubber gasket are tightly combined, the inner diameter of the annular plugging part is gradually increased from top to bottom, the outer diameter of the annular anti-collision part is gradually increased from top to bottom, the outer wall of the anti-collision part and the inner wall of the plugging part are conical surfaces, the conicity is different, the conicity of the anti-collision part is larger than that of the plugging part, the annular groove and the plugging part have the same structure, the annular groove annular conical surface is provided with an acting force with a certain included angle on the anti-collision part, so that the anti-collision part can provide an acting force on the third inclined part of the annular metal framework, the acting force can be provided to enable the anti-collision part to be more stable, long-term usability of the annular rubber gasket is guaranteed, the size of the outer wall of the anti-collision part is one third to one fourth of that of the inner wall of the plug-in part, the anti-collision part is smaller, larger support can be obtained, the outer wall of the anti-collision part and the inner wall of the plug-in part are connected through obtuse fold lines, the upper ends of the anti-collision part and the inner wall of the plug-in part are connected through straight lines, support with more force can be obtained, the structure is more stable, good support effect can be achieved, the problem that the anti-collision effect of the annular rubber gasket is poor is solved, the service life of the die core is prolonged, the use cost of the die core is reduced, the production cost of the rubber gasket is reduced to be less than 1 yuan per hour, the production efficiency of the rubber gasket is improved, the production efficiency of the die core is improved, the production efficiency is improved, the production efficiency of the metal framework rubber gasket is replaced by 6 dies/hour, the die/hour is more than 10 die/hour, and the problem of metal is low in production cost is caused by the metal-frame replacement, and the problem is low, and the problem is caused by the low cost of metal quality is caused by extrusion of die metal. The annular rubber gasket is contacted with the first rubber ring, and the annular rubber gasket is contacted with the annular metal framework, so that the rubber is prevented from overflowing to the third inclined part of the annular metal framework, and the phenomenon of rubber overflow is avoided.
In the invention, the mold core is made of hard aluminum A7075, the annular metal framework is made of hard alloy steel V40, and the thermal expansion coefficient of the hard aluminum A is 23.6X10 -6 The V thermal expansion coefficient of the hard alloy steel is 6 multiplied by 10 at the temperature of/DEG C -6 The coefficient of thermal expansion of duralumin A is far greater than that of hard alloy steel V, the difference of thermal expansion of the two sizes of the diameter 22mm is 0.07mm when the rubber is vulcanized at the temperature of heating, the difference can be eliminated when the rubber is cooled at room temperature during demolding, so that the mold core and the annular metal framework are prevented from being blocked at the beginning of extrusion, the mold core and the annular metal framework are ensured to be matched to form a closed cavity for rubber molding, the problem that the processing procedure is difficult after glue overflows from the inner side wall of the metal framework due to overlarge gap between the metal framework and the mold core during the production of the rubber sealing ring of the framework is avoided, the rubber sealing ring of the framework is easy to be separated from the mold core after the rubber is vulcanized, and the production efficiency is higher.
According to the invention, the first magnet, the second magnet, the third magnet and the fourth magnet are arranged, so that the mold core is attracted to the upper mold plate and the mold core is repelled to the lower mold plate, the mold core is matched with the upper mold plate and the annular metal framework to form a closed cavity in the heating vulcanization process of rubber, the closed cavity is used for rubber molding, the control of the size of a framework rubber sealing ring is facilitated, the qualification rate of products is improved, the mold core is repelled from the lower mold plate, the mold core is easier to separate from the lower mold plate in the demolding process, the production efficiency is higher, meanwhile, the cavity is formed between the mold core and the lower mold plate, the pressure transferred by the lower mold plate to the mold core is reduced, the abrasion of the mold core is reduced, and the service life of the mold core is prolonged.
According to the invention, the pressure-relieving spring is arranged between the mold core and the lower mold plate, when rubber is vulcanized and molded, the force transmitted to the mold core by the pressure-relieving spring can jack up the mold core, so that a gap is formed between the mold core and the lower mold plate, a closed cavity is formed between the mold core and the annular metal framework and between the mold core and the upper mold plate for rubber molding, the product qualification rate is improved, the mold core and the annular metal framework are prevented from being blocked, the abrasion of the mold core is reduced, meanwhile, the stroke of the pressure-relieving spring is variable, and when the inner diameter size of the annular metal framework changes, the pressure-relieving spring can automatically adjust and adapt to the fit gap between the mold core and the annular metal framework, so that the pressure-relieving spring is more practical.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a skeletal rubber seal ring structure of the present invention;
FIG. 2 is a schematic view of a first cavity structure of a mold for producing a skeletal rubber seal ring of the present invention;
FIG. 3 is a schematic structural view of an embodiment of a mold for producing a skeletal rubber seal ring of the present invention;
FIG. 4 is a schematic structural view of the working state of the production mold of the skeleton rubber sealing ring of the invention;
FIG. 5 is a schematic structural view of a mold for producing a skeletal rubber seal ring in accordance with the present invention;
FIG. 6 is a schematic view of a ring-shaped rubber gasket in the mold for producing a skeletal rubber seal ring of the present invention;
FIG. 7 is a schematic structural view of a mold for producing a skeletal rubber seal ring in accordance with the present invention;
FIG. 8 is a schematic view showing the structure of a mold for producing a rubber seal ring of a skeleton according to still another embodiment of the present invention;
in the figure: the mold comprises a 1-annular metal framework, 101-first inclined parts, 102-second vertical parts, 103-third inclined parts, 2-first rubber rings, 3-second rubber rings, 4-extension parts, 5-chamfer angles, 6-upper templates, 7-lower templates, 8-first cavities, 9-mold cores, 91-metal caps, 92-lower mold cores, 93-fifth inclined parts, 94-sixth vertical parts, 95-seventh inclined parts, 96-eighth vertical parts, 97-ninth vertical parts, 10-mold cavities, 11-annular grooves, 12-annular rubber washers, 121-anti-collision parts, 122-plug-in parts, 13-first magnets, 14-second magnets, 15-third magnets, 16-fourth magnets, 17-slow compression springs and 18-gaps.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the framework rubber sealing ring provided by the invention comprises an annular metal framework 1, wherein the annular metal framework 1 comprises three parts with inner diameters gradually changing from top to bottom, a first inclined part 101 with the inner diameter gradually decreasing from top to bottom, a second vertical part 102 with the inner diameter unchanged, and a third inclined part 103 with the inner diameter gradually increasing from top to bottom, a first rubber ring 2 is arranged on the first inclined part 101, the first rubber ring 2 is in a taper sleeve shape, and a second rubber ring 3 is arranged on the outer wall of the annular metal framework 1.
In this embodiment, when using, install skeleton rubber sealing ring in pneumatic brake pipeline joint department, annular metal skeleton 1 plays the supporting role, has increased skeleton rubber sealing ring structure's stability, and the setting of first rubber circle 2 and second rubber circle 3 has played double-deck sealed effect, has improved skeleton rubber sealing ring's leakproofness, and first rubber circle 2 is taper sleeve type, and upper portion is little lower part big, is convenient for install skeleton rubber sealing ring in pneumatic brake pipeline joint department, and the practicality is strong. The annular metal skeleton 1 includes the first slope portion 101 that the internal diameter from top to bottom gradually reduces, the second vertical portion 102 that the internal diameter remains unchanged, the internal diameter is from top to bottom gradually the third slope portion 103 that increases, the inclined plane setting of first slope portion 101 makes annular metal skeleton 1 and the area of contact of first rubber circle 2 bigger, when the skeleton rubber sealing ring uses, pipeline joint department exerts effort to annular metal skeleton 1 frame, first slope portion 101, the setting of third slope portion 103 makes annular metal skeleton not only produce an axial effort to first rubber circle 2, but also produce a radial effort, make annular metal skeleton 1 and the inseparabler of first rubber circle 2 combination, can effectively prevent annular metal skeleton 1 and the fracture of first rubber circle 2 department and reduce skeleton rubber sealing ring's life when guaranteeing the sealing effect, thereby skeleton rubber sealing ring's practicality and life have been improved.
Further, an extension portion 4 is provided on the first rubber ring 2, and the extension portion 4 encloses the second vertical portion 102.
In this embodiment, the extension portion 4 that sets up on the first rubber circle 2 wraps the vertical portion 102 of second, when pipeline joint department applys effort to annular metal skeleton 1, extension portion 4 can play the cushioning effect, the wearing and tearing of annular metal skeleton have been reduced, simultaneously, extension portion 4 wraps the vertical portion 102 of second, prevent by the object of cup jointing and the vertical portion 102 direct contact of second, the antiskid effect has been strengthened, simultaneously, first tilting portion 101 forms the obtuse angle with the vertical portion 102 of second, apply axial effort to the first rubber circle 2, make extension portion 4, the inseparable laminating of the inside pipeline joint department of first rubber circle 2, the sealed effect of skeleton rubber sealing ring has been improved, thereby skeleton rubber sealing ring's life has been improved, antiskid nature and sealed effect.
Further, chamfer 5 is arranged at the upper end and the lower end of the annular metal framework 1, the chamfer 5 is coated by the second rubber ring 3, the annular metal framework 1 further comprises a fourth vertical portion 104 with the inner diameter unchanged, the fourth vertical portion 104 is arranged at the lower portion of the third inclined portion 103, the included angle between the upper end face of the annular metal framework 1 and a bus of the first rubber ring 2 is 95-130 degrees, the included angle between the upper end face of the annular metal framework 1 and the first inclined portion 101 is 130-175 degrees, the included angle between the upper end face of the annular metal framework 1 and the third inclined portion 103 is 60-80 degrees, and the length ratio between the third inclined portion 103 and the first inclined portion 101 is 3-5: 1.
in this embodiment, the upper and lower both ends of annular metal skeleton 1 are provided with chamfer 5, have increased annular metal skeleton 1 and the area of contact of second rubber circle 3, make second rubber circle 3 can be fine with annular metal skeleton 1 parcel block for skeleton rubber sealing ring is better when using the leakproofness.
Example 2
As shown in fig. 2-4, a mold for producing a rubber sealing ring of a skeleton comprises an upper mold plate 6 and a lower mold plate 7, wherein a first cavity 8 is formed between the upper mold plate 6 and the lower mold plate 7, a mold core 9 is arranged in the first cavity 8, a mold cavity 10 for the rubber sealing ring of the skeleton is formed between the upper mold plate 6, the lower mold plate 7 and the mold core 9, the mold core 9 comprises a metal cap 91 and a lower mold core 92, and the metal cap 91 is connected with the lower mold core 92 in a disassembling mode.
In this embodiment, when the rubber sealing ring for the framework is produced, firstly, the annular metal framework 1 is placed in the die cavity 10 to be in contact with the die core 9, the upper die plate 6 and the lower die plate 7 are combined, rubber raw materials are injected into the die cavity 10, pressure and temperature are applied to the upper die plate and the lower die plate through the heating plate of the vulcanizing press, the rubber is vulcanized and crosslinked in the die cavity 10 and is bonded with the metal ring for the framework, after vulcanization is completed, the die is opened, the product is taken out, in the production process of the rubber sealing ring for the framework, friction exists between the die core 9 and the upper die plate 6 and between the die core 9 and the annular metal framework 1, so that the upper half part of the die core 9 is easy to wear, the upper half part easy to wear is divided into two parts by the replaceable metal cap 91, and the lower die core 92 is connected in a threaded or spliced mode and the like in a detachable mode, after the metal cap 91 is worn, the replacement cost is saved, thereby the production cost of the rubber sealing ring for the framework is saved, and the technical problem that the technical personnel cannot be solved due to the fact that the quick wear and the replacement cost is high when the die core is required in the production of the rubber sealing ring for the framework is produced is solved.
Further, the mold core 9 is cylindrical, the mold core 9 comprises five parts with the outer diameters gradually changing from top to bottom, a fifth inclined part 93 with the outer diameter gradually increasing from top to bottom, a sixth vertical part 94 with the outer diameter unchanged, a seventh inclined part 95 with the outer diameter gradually increasing from top to bottom, an eighth vertical part 96 with the outer diameter unchanged and a ninth vertical part 97, the outer diameter of the eighth vertical part 96 is larger than that of the ninth vertical part 97, when the mold core 9 works, the outer walls of the fifth inclined part 93 and the sixth vertical part 94 are in contact with the first rubber ring 2, the outer wall of the seventh inclined part 95 is in contact with the annular metal skeleton 1, and the outer wall of the eighth vertical part 96 is in partial contact with the annular metal skeleton 1.
In this embodiment, the mold core 9 includes a fifth inclined portion 93 with an outer diameter gradually increasing from top to bottom, a sixth vertical portion 94 with an outer diameter kept unchanged, a seventh inclined portion 95 with an outer diameter gradually increasing from top to bottom, an eighth vertical portion 96 with an outer diameter kept unchanged, and a ninth vertical portion 97 with an outer diameter changed, so that the mold core 9 can well correspond to the annular metal framework 1 and the first rubber ring 2 of the framework rubber sealing ring in size, the size of the framework rubber sealing ring is convenient to precisely control, the qualification rate of the produced framework rubber sealing ring product is improved from 70% to more than 90%, the yield of the framework rubber sealing ring is greatly improved, and the glue overflow phenomenon on the inner side wall of the framework metal ring in the production process is reduced.
Example 3
As shown in fig. 5, a mold for producing a rubber seal ring of a skeleton includes all the structures of embodiment 2, wherein the mold core 9 is a magnetic mold core, and the mold core 9 and the annular metal skeleton 1 are magnetically attracted.
In this embodiment, the mold core 9 is a magnetic mold core, and before the vulcanization molding processing of rubber, the annular metal framework 1 and the mold core 9 are combined together through magnetic adsorption, so that the phenomenon of glue overflow in the production process of the framework rubber sealing ring is avoided, and meanwhile, the combined body and the upper mold plate 6 form a closed cavity for rubber molding, so that the pressure of the lower mold plate 7 on the mold core 9 is reduced, and the abrasion of the mold core 9 is reduced.
Further, the seventh inclined portion 95 is provided with an annular groove 11, and the annular groove 11 is filled with an annular rubber gasket 12 for forming a buffer at a contact portion between the mold core 9 and the annular metal skeleton 1, and the annular rubber gasket 12 is in contact with the first rubber ring 2.
The problem frequently encountered in actual production is that when the annular metal skeleton 1 is sleeved on the mold core 9, collision and friction can be generated between the annular metal skeleton 1 and the mold core 9 so as to damage the mold core 9, even if slight deformation or abrasion is caused, the mismatch between the mold core 9 and the annular metal skeleton 1 is also caused, thereby causing improvement of defective rate, therefore, the mold core 9 needs to be frequently replaced, in the embodiment, annular groove 11 is formed in a seventh inclined part 95 which is directly contacted with the annular metal skeleton 1 on the mold core 9, and is filled with an annular rubber gasket 12, the annular rubber gasket 12 is designed to be slightly higher than the annular groove 11, the annular rubber gasket 12 can be well reduced to collide, the problem that the seventh inclined part 95 which is contacted with the third inclined part 103 of the annular metal skeleton 1 on the mold core 9 is easily damaged by collision is solved, the annular groove 11 is increased, the annular rubber gasket 12 is newly encountered during production, namely the annular rubber gasket 12 is difficult to be satisfactory in the process, and the annular rubber gasket 12 is finally designed to comprise an anti-collision part 121 extending out of the annular groove 11 and an anti-collision part 121 for being plugged into the annular groove 11, the annular groove 11 is slightly inclined part 121 is slightly higher than the inner diameter of the annular groove 121, and the inner diameter of the annular gasket is gradually increased from the inner diameter of the annular groove 121 to the annular groove is gradually increased to the outer diameter of the annular groove is gradually increased to the annular groove is the inner diameter of the annular groove is gradually increased to the annular groove is the diameter of the annular groove 11, and the annular gasket is gradually increased to the inner diameter is gradually increased to the annular rubber gasket is the annular rubber 12 is the annular, the inner wall of the insertion part 122 is conical, the conicity is different, the conicity of the anti-collision part 121 is larger than that of the insertion part 122, and the annular groove 11 and the insertion part 122 have the same structure, so that the bottom surface of the annular conical surface of the annular groove 11 can provide a force with a certain included angle to the anti-collision part 121, thereby not only realizing that the anti-collision part 121 provides a force to the third inclined part 103 of the annular metal framework 1, but also providing a force to make the anti-collision part 121 more stable, thereby ensuring the long-term usability of the annular rubber gasket 12, the size of the outer wall of the anti-collision part 121 is one third to one fourth of the inner wall of the insertion part 122, the anti-collision part 121 is smaller, thus larger support can be obtained, the outer wall of the anti-collision part 121 and the inner wall of the insertion part 122 are connected at the upper ends through obtuse angle fold lines when seen from a longitudinal section, the lower end is connected through the straight line, so that the support of more directional force can be obtained, the structure is more stable, and a good support effect can be achieved, so that the problem that the annular rubber gasket 12 is poor in anti-collision effect is well solved, the service life of the mold core 9 is prolonged, the use cost of the mold core is saved, the cost of the mold core is uniformly reduced from 4 yuan/each to less than 1 yuan/each, the production cost of the skeleton rubber sealing ring is saved, the production efficiency is improved, the production efficiency of the skeleton rubber sealing ring is improved from 6 moulds/hour to more than 10 moulds/hour, and the technical problems of high cost and low production efficiency caused by the damage and replacement of the mold core 9 due to the extrusion of the annular metal skeleton 1 made of metal materials to the mold core 9 are solved. The annular rubber gasket 12 is in contact with the first rubber ring 2, and the annular rubber gasket 12 is in contact with the annular metal skeleton 1, so that the rubber is prevented from overflowing to the third inclined part 103 of the annular metal skeleton 1, and the phenomenon of rubber overflow is avoided.
Example 4
As shown in fig. 4, a mold for producing a rubber seal ring with a skeleton includes all the structures of embodiment 2, wherein the material of the mold core 9 is duralumin a7075, and the material of the annular metal skeleton 1 is cemented carbide steel V40.
In this embodiment, the mold core 9 is made of duralumin A7075, the annular metal skeleton 1 is made of cemented carbide steel V40, and the heat expansion coefficient of duralumin A7075 is 23.6X10 -6 The thermal expansion coefficient of the cemented carbide steel V40 is 6 multiplied by 10 at the temperature of/DEG C -6 The coefficient of thermal expansion of duralumin A7075 is far greater than that of hard alloy steel V40, the difference of thermal expansion of the two sizes with the diameter of 22mm is 0.07mm when the rubber is vulcanized at 180 ℃, the difference can be eliminated when the rubber is cooled at room temperature during demolding, so that the mold core 9 and the annular metal framework 1 are prevented from being blocked at the beginning of extrusion, the mold core 9 and the annular metal framework 1 can be matched to form a closed cavity for rubber molding, the problem that the processing process is difficult after the rubber overflows from the inner side wall of the framework metal ring due to overlarge gap between the framework metal ring and the mold core during the production of the framework rubber sealing ring is avoided, meanwhile, the framework rubber sealing ring is easy to be separated from the mold core after the rubber vulcanization is completed, and the production efficiency is higher.
Example 5
As shown in fig. 6, a mold for producing a rubber seal ring of a skeleton, which comprises all the structures of embodiment 2, further comprises that a first magnet 13 is arranged at one end of the mold core 9 close to the upper mold plate 6, a second magnet 14 is arranged at one end of the mold core 9 close to the lower mold plate 6, a third magnet 15 for making the mold core 9 and the upper mold plate 6 close to each other is arranged in the upper mold plate 6, and a fourth magnet 16 for making the mold core 9 and the lower mold plate 7 far away from each other is arranged in the lower mold plate 7.
In this embodiment, the setting of first magnet 13, second magnet 14, third magnet 15, fourth magnet 16 for mold core 9 is close to each other with cope match-plate pattern 6, mold core 9 is kept away from each other with lower bolster 7, make rubber in the heating vulcanization in-process mold core 9 and cope match-plate pattern 6, annular metal skeleton 1 cooperation form airtight cavity, be used for rubber moulding, the control of skeleton rubber sealing ring size of being convenient for has improved the qualification rate of product, mold core 9 and lower bolster 7 repulse, make in the drawing of patterns in-process, mold core 9 and lower bolster 7 separation are easier, production efficiency is higher, simultaneously, make form the cavity between mold core 9 and the lower bolster 7, the pressure of lower bolster 7 to mold core 9 transmission has been got rid of, thereby the wearing and tearing of mold core 9 have been reduced, the life of mold core 9 has been improved.
Example 6
As shown in fig. 6, a mold for producing a rubber seal ring of a skeleton includes all the structures of embodiment 2, and further includes a pressure-release spring 17 provided between the mold core 9 and the lower die plate 7, wherein when the mold core 9 is lifted up by the pressure-release spring 17, a gap 18 is formed between the mold core 9 and the lower die plate 7.
In this embodiment, the buffer spring 17 sets up between mold core 9 and lower bolster 7, the power that buffer spring 17 transmitted for mold core 9 can jack up mold core 9 when rubber vulcanization shaping, make form the clearance between mold core 9 and the lower bolster, both guarantee to form airtight cavity between mold core 9 and annular metal skeleton 1, cope match-plate pattern 6 and be used for rubber moulding, improve the product qualification rate, can avoid mold core 9 and annular metal skeleton 1 card to die again, the wearing and tearing of mold core 9 have been reduced, simultaneously, buffer spring 17 stroke is variable, when annular metal skeleton 1 internal diameter size appears changing, buffer spring 17 accessible forms the fit clearance between automatically regulated adaptation mold core 9 and the annular metal skeleton 1, therefore more practical.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The utility model provides a skeleton rubber sealing ring production mould, its characterized in that includes cope match-plate pattern (6), lower bolster (7), cope match-plate pattern (6) with form first cavity (8) between lower bolster (7), be provided with mold core (9) in first cavity (8), cope match-plate pattern (6) lower bolster (7) with form between mold core (9) and be used for holding die cavity (10) of skeleton rubber sealing ring, mold core (9) include metal cap (91) and lower mold core (92), metal cap (91) with lower mold core (92) are dismantled and are connected, mold core (9) are magnetic mold core, mold core (9) are through magnetic adsorption with annular metal skeleton (1);
the mold core (9) is cylindrical, the mold core (9) comprises five parts with the outer diameters being changed from top to bottom in sequence, a fifth inclined part (93) with the outer diameters being gradually increased from top to bottom, a sixth vertical part (94) with the outer diameters being kept unchanged, a seventh inclined part (95) with the outer diameters being gradually increased from top to bottom, an eighth vertical part (96) with the outer diameters being kept unchanged and a ninth vertical part (97), the outer diameter of the eighth vertical part (96) is larger than the outer diameter of the ninth vertical part (97), when the mold core (9) works, the outer wall of the fifth inclined part (93) and the outer wall of the sixth vertical part (94) are in contact with the first rubber ring (2), the outer wall of the seventh inclined part (95) is in contact with the annular metal skeleton (1), and the outer wall of the eighth vertical part (96) is in partial contact with the annular metal skeleton (1).
A pressure release spring (17) is arranged between the mold core (9) and the lower mold plate (7), and a gap (18) is formed between the mold core (9) and the lower mold plate (7) when the mold core (9) is jacked up by the pressure release spring (17).
2. The mold for producing the rubber seal ring of the framework according to claim 1, wherein the seventh inclined portion (95) is provided with an annular groove (11), the annular groove (11) is filled with an annular rubber gasket (12) for forming a buffer at a contact position of the mold core (9) and the annular metal framework (1), and the annular rubber gasket (12) is in contact with the first rubber ring (2).
3. The mold for producing the rubber sealing ring of the framework according to claim 1, wherein the mold core (9) is made of duralumin A7075, and the annular metal framework (1) is made of cemented carbide steel V40.
4. The mold for producing the skeletal rubber seal ring according to claim 1, wherein a first magnet (13) is arranged at one end of the mold core (9) close to the upper mold plate (6), a second magnet (14) is arranged at one end of the mold core (9) close to the lower mold plate (6), a third magnet (15) for making the mold core (9) and the upper mold plate (6) close to each other is arranged in the upper mold plate (6), and a fourth magnet (16) for making the mold core (9) and the lower mold plate (7) far away from each other is arranged in the lower mold plate (7).
5. The skeleton rubber sealing ring produced by the skeleton rubber sealing ring production die according to claim 1 is characterized by comprising an annular metal skeleton (1), wherein the annular metal skeleton (1) comprises three parts with inner diameters changing from top to bottom in sequence, namely a first inclined part (101) with the inner diameter gradually decreasing from top to bottom, a second vertical part (102) with the inner diameter unchanged, and a third inclined part (103) with the inner diameter gradually increasing from top to bottom, the first inclined part (101) is provided with a first rubber ring (2), the first rubber ring (2) is in a taper sleeve shape, and the outer wall of the annular metal skeleton (1) is provided with a second rubber ring (3);
an extension part (4) is arranged on the first rubber ring (2), and the extension part (4) covers the second vertical part (102);
the upper end and the lower end of the annular metal framework (1) are respectively provided with a chamfer (5), the second rubber ring (3) is coated on the chamfer (5), the annular metal framework (1) further comprises a fourth vertical part (104) with the inner diameter unchanged, the fourth vertical part (104) is arranged at the lower part of the third inclined part (103), the included angle between the upper end surface of the annular metal framework (1) and a bus of the first rubber ring (2) is 95-130 degrees, the included angle between the upper end surface of the annular metal framework (1) and the first inclined part (101) is 130-175 degrees, the included angle between the upper end surface of the annular metal framework (1) and the third inclined part (103) is 60-80 degrees, and the length ratio between the third inclined part (103) and the first inclined part (101) is 3-5: 1.
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| CN110219984A (en) * | 2019-06-28 | 2019-09-10 | 江苏核电有限公司 | A kind of conical surface seal part producing device and production method |
| CN111216370A (en) * | 2019-11-29 | 2020-06-02 | 南京金三力橡塑有限公司 | Processing method and forming die for rubber composite gasket with metal framework |
| CN114103000A (en) * | 2020-08-28 | 2022-03-01 | 中兴通讯股份有限公司 | Mold and control method thereof |
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