CN104309029B - There is the tire vertical compression mould of limit function - Google Patents

Abstract

The invention relates to a tire vulcanization mold with a position-limiting function, which belongs to the field of tire production equipment. It includes an outer mold, an inner mold, an expansion limit end ring of the inner mold, a contraction limit block of the inner mold and a drum tile limit mechanism. The inner mold expansion limit end ring and the inner mold contraction limit block installed in the inner mold ensure the high precision of the inner mold action, effectively solving the problems such as the difficulty of unloading the tire caused by the inner membrane action accuracy not meeting the requirements; The tile limit mechanism is installed on the outer mold and cooperates with the inner mold, which can fundamentally solve the unevenness of the inner surface of the finished tire caused by the retraction of the metal inner mold under high vulcanization pressure in the existing metal inner mold direct pressure vulcanization process problem, effectively improving the uniformity and dynamic balance of the finished tire, and the upper limit ring and the lower limit ring can effectively share the vulcanization pressure of the drum shoe transmission parts, increasing the life of the transmission parts and the transmission system.

Description

Tire direct pressure mold with limit function

technical field

The invention relates to the field of tire production equipment, in particular to a mold for a tire direct pressure vulcanizer.

Background technique

As we all know, there are some unavoidable defects in bladder vulcanization. Except for the problems in the manufacturing process of the bladder, the bladder is a flexible body, and it is impossible to force the rubber material to achieve uniform mass distribution in the molten state through vulcanization. Patent CN203267003U mentions that the inner mold of a tire direct pressure vulcanizer replaces the vulcanization bladder of the central mechanism of the vulcanizer, and the piston rod is driven by the oil cylinder, the piston rod drives the connecting rod, and the connecting rod drives to complete the expansion and contraction of the drum shoe. When the vulcanizer is at the mold closing position, the drum shoe is fully stretched, and its outer diameter is equal to the inner contour diameter of the finished tire, and it cooperates with the outer mold to complete the vulcanization. Compared with the traditional bladder vulcanization, the metal mold direct pressure vulcanization can effectively improve the uniformity and dynamic balance of the tire, but the reliability of the connecting rod transmission mechanism is poor under high vulcanization pressure. Therefore, the patent CN203542913U mentions that a guide rail type tire direct pressure vulcanization mold replaces the connecting rod type central mechanism vulcanizer mold, and the axial displacement of the piston rod is converted into the radial displacement of the drum tile through the inclined rail slider mechanism to complete the drum tile. Compared with the previous linkage mechanism, the transmission of the guide rail slider transmission mechanism is more stable. However, there are still some defects in the existing direct pressure vulcanization process. The guide rail slider type center mechanism has no action limit during the expansion and contraction of the drum tiles, and only relies on the displacement control of the hydraulic cylinder, which is difficult to meet the accuracy requirements, and the drum tiles expand and contract. If it is not in place, it will cause problems such as difficulty in unloading the tire. In addition, there is a certain degree of flexibility in the clamping of the hydraulic cylinder, and the transmission parts of the drum shoe will shrink under the action of high pressure, resulting in uneven inner surface of the tire, which affects the dynamic balance and uniformity of the tire.

Contents of the invention

In order to overcome the defects of the prior art, the present invention provides a tire direct pressure mold with a position limiting function, which can realize the position limitation of the expansion and contraction of the inner mold, and ensure the accuracy requirements of the inner mold action. In addition, the drum shoe is limited before vulcanization, and the rigid mold clamping action of the expanded drum shoe is completed to ensure that the outer diameter of the drum shoe is completely equal to the inner diameter of the finished tire during the vulcanization process, and the dynamic balance and uniformity of the finished tire are improved. And effectively share the vulcanization pressure of the transmission parts of the drum shoe, and improve the life of the transmission parts.

The technical solution adopted by the present invention to solve the technical problem is: the present invention provides a tire direct pressure mold with a position limiting function, including an outer mold, an inner mold, an inner mold expansion limit end ring, an inner mold contraction limit block and Drum tile limit mechanism. Wherein, the outer mold includes an upper plate, an upper side plate, an upper steel ring, a middle mold cover, a bow seat, a slider, a pattern block, a lower steel ring, a lower side plate, and a lower plate. The inner mold includes connecting screws, clamp rings, wedge blocks, piston rods, wide tile brackets, wide tiles, narrow tile brackets, narrow tiles, and bottom plate limit discs. The upper steel ring and the upper side plate, the upper side plate and the upper plate are fixedly connected by screws; the upper plate has the same number of T-shaped guide rail grooves as the slider, and the slider is installed on the T-shaped guide rail groove, and is connected with the bow seat through screws. Fixed connection; the bow seat is fixedly connected with the pattern block, and connected with the middle mold sleeve through the inclined guide rail slider mechanism, so as to meet the outward expansion of the bow-shaped seat during the rising process of the middle mold sleeve. The lower plate and the lower side plate, the lower side plate and the lower steel ring are fixedly connected by screws. The wide tiles and wide tile brackets are fixed by screws, and the wide tile brackets are respectively driven by the bottom plate limit plate and wedge block through the guide rail slider mechanism. The narrow tiles and narrow tile brackets are fixed by screws, and the narrow tile brackets are passed by the guide rail slider mechanism. Cooperate with the bottom plate limit plate and the wedge block for transmission respectively. The wedge block is connected together through the connecting bolt, clamp ring and piston rod. The wedge block rises and moves down with the piston rod. The wide tile and narrow tile are coordinated by the guide rail slider mechanism. Radial contraction and expansion. The expansion limit end ring of the inner mold is fixed on the bottom of the bottom plate limit disc by screws. On the side of the narrow tile close to the piston rod, there are fixed inner mold shrinkage limiters with the same number as the narrow tiles, and the inner mold shrinkage limiter has an arc surface with the same diameter as the piston rod.

The drum tile limit mechanism is composed of an upper limit mechanism and a lower limit mechanism. The upper limit mechanism includes an upper limit ring, an upper oil cylinder, and an upper piston rod; the lower limit mechanism includes a lower limit ring, a lower oil cylinder, and a lower piston rod. Both the upper limit ring and the lower limit ring have the same number of keys as the narrow tiles. The outer surface of the top of the key has a conical surface at a certain angle that matches the edge of the narrow tile. The keys are located in the holes opened in the outer mold. , the upper plate and the upper side plate provide guidance for the insertion key of the upper limit ring; the lower plate and the lower side plate provide guidance for the insertion key of the lower limit ring. The structure of the lower limit mechanism is the same as that of the upper limit mechanism, and the upper and lower positions are arranged correspondingly. The upper limit ring and the lower limit ring are respectively connected with the upper piston rod and the lower piston rod, and are respectively driven by the upper oil cylinder and the lower oil cylinder. The upper oil cylinder and the lower oil cylinder can also be air cylinders.

The beneficial effect of the present invention is: limit the expansion and contraction of the inner mold, ensure the accuracy requirements of the inner mold action, and effectively solve the problems such as the difficulty of unloading the tire caused by the action precision of the inner mold not meeting the requirements; The limit ring acts as a rigid limit for the retractable metal inner mold, which can fundamentally solve the unevenness of the inner surface of the finished tire caused by the retraction of the metal inner mold under high vulcanization pressure in the existing direct pressure vulcanization process of the metal inner mold. Inequalities can effectively improve the uniformity and dynamic balance of finished tires; in addition, the limit ring can effectively share the vulcanization pressure of the drum shoe transmission parts, increasing the life of the transmission parts and the transmission system.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the schematic diagram of the mold clamping working state of the tire vulcanization inner mold of the present invention

Fig. 2 is the schematic diagram of the mold opening working state of the tire vulcanization inner mold of the present invention

Fig. 3 is a key position diagram of the tire vulcanization mold of the present invention.

1. Upper plate, 2 Upper limit ring, 3. Upper side plate, 4. Upper steel ring, 5. Middle mold cover, 6. Bow seat, 7. Pattern block, 8. Lower plate, 9. Lower side plate, 10 .Lower steel ring, 11. Embryo, 12. Slider, 13. Clamp ring, 14. End cover, 15. Wedge block, 16. Narrow tile, 17. Narrow tile bracket, 18. Inner mold shrinkage limiter, 19. Insert key, 20. Lower limit ring, 21. Piston rod, 22. Lower oil cylinder, 23. Lower piston rod, 24. Base plate limit plate, 25. Wide tile bracket, 26. Wide tile, 27. Inner mold expansion Open limit end ring, 28. connecting bolt, 29. upper piston rod, 30. upper oil cylinder.

detailed description

Referring to Fig. 1, Fig. 2, and Fig. 3, a tire direct pressure mold with position limiting function of the present invention includes an outer mold, an inner mold, an inner mold expansion limit end ring 27, an inner mold contraction limit block 18 and a drum Watt limit mechanism. Wherein, the outer mold includes an upper plate 1, an upper side plate 3, an upper steel ring 4, a middle mold cover 5, a bow seat 6, a slider 12, a pattern block 7, a lower steel ring 10, a lower side plate 9, and a lower plate 8. Inner mold comprises connecting bolt 28, clamp ring 13, wedge-shaped block 15, piston rod 21, wide tile support 25, wide tile 26, narrow tile support 17, narrow tile 16, bottom plate limit plate 24. The upper steel ring 4 and the upper side plate 3, the upper side plate 3 and the upper plate 1 are fixedly connected by screws; the upper plate 1 has the same number of T-shaped guide rail grooves as the slider 12, and the slider 12 is installed on the T-shaped guide rail groove , and is fixedly connected with the bow-shaped seat 6 by screws; the bow-shaped seat 6 is fixedly connected with the pattern block 7, and is connected with the middle mold cover 5 through an inclined guide rail slider mechanism, so as to meet the rising process of the middle mold cover and pull the bow-shaped seat 6 outward. expansion. The lower plate 8 and the lower side plate 9, the lower side plate 9 and the lower steel ring 10 are fixedly connected by screws; in the mold clamping state, the upper steel ring 4, the lower steel ring 10 and the pattern block 7 form a complete outer contour of the finished tire. The wide tile 26 and the wide tile bracket 25 are fixedly connected by screws, the wide tile bracket 25 cooperates with the bottom plate limit plate 24 and the wedge block 15 through the guide rail slider mechanism to drive respectively, the narrow tile 16 and the narrow tile bracket 17 are fixed by screws, and the narrow The tile bracket 17 cooperates with the bottom plate limit plate 24 and the wedge block 15 through the guide rail slider mechanism to drive respectively. The wedge block 15 is connected together by the connecting bolt 28, the clamp ring 13, the end cover 14 and the piston rod 21. The wedge block 15 moves with the piston. The rod 21 rises and moves down, and the wide tile 26 and the narrow tile 16 radially contract and expand under the cooperation of the guide rail slider mechanism. Inner mold expansion limit end ring 27 is fixed on the bottom of floor limit disc 24 by screws. During the expansion process of the inner mold, the limit plate 24 of the bottom plate remains still, the wedge block 15 moves down with the piston rod, the wide tile 26 and the narrow tile 16 radially expand until the inner mold expands and the bottom surface of the limit end ring 27 contacts Bottom plate limit plate 24, inner mold expands and puts in place. On the side of the narrow tile 16 close to the piston rod 21 , there are fixed internal mold shrinkage limiters 18 having the same number as the narrow tile 16 , and the inner mold shrinkage limiter 18 has an arc surface with the same diameter as the piston rod 21 . During the shrinking process of the inner mold, the wedge block 15 rises with the piston rod 21, and the wide tile 26 and the narrow tile 16 shrink radially until the arc surface of the inner mold shrinkage limiter 27 completely hugs the piston rod 21, and the inner mold shrinks in place. Inner mold expansion The inner mold expansion limit end ring 27 and the inner mold contraction limit block 18 ensure the integrity of the movement track of the inner mold drum tile.

The drum tile limit mechanism is composed of an upper limit mechanism and a lower limit mechanism. The upper limit mechanism includes an upper limit ring 2, an upper oil cylinder 30, and an upper piston rod 29; the lower limit mechanism includes a lower limit ring 20, a lower oil cylinder 22, and a lower piston rod 23. Both the upper limit ring 2 and the lower limit ring 20 have the same number of insert keys 19 as the narrow tiles 16, the outer surface of the top end of the insert keys 19 has a tapered surface at a certain angle that matches the edge of the narrow tile 16, and the insert keys 19 are located on the outside. In the holes provided in the mold, the upper plate 1 and the upper side plate 3 provide guidance for the key 19 of the upper limit ring 2; the lower plate 8 and the lower side plate 9 provide guidance for the key 19 of the lower limit ring 20. The structure of the lower limit mechanism is the same as that of the upper limit mechanism, and the upper and lower positions are arranged correspondingly. The upper limit ring 2 and the lower limit ring 20 are connected with the upper piston rod 29 and the lower piston rod 23 respectively, and are respectively driven by the upper oil cylinder 30 and the lower oil cylinder 22 . The upper oil cylinder 30 and the lower oil cylinder 22 can also be air cylinders.

After the mold clamping action is completed, the upper limit ring 2 and the lower limit ring 20 respectively descend and rise under the simultaneous action of the upper oil cylinder 30 and the lower oil cylinder 22. Up, the outside taper surface of the top end of the plug key 19 contacts the edge surface of the drum tile, and the action stops after the upper oil cylinder 30 and the lower oil cylinder 22 reach the specified pressure. The working height of plug key 19 top is greater than drum tile wall thickness. At this time, the upper limit ring 2 and the lower limit ring 20 complete the rigid mold clamping action on the drum shoe to ensure that the outer diameter of the drum shoe is completely equal to the inner diameter of the finished tire. The vulcanization pressure that the narrow tile 16 bears in the inner mold is high, and the retraction phenomenon mainly occurs on the narrow tile 16 . Therefore, the present invention installs the key 19 positions of the upper limit ring 2 and the lower limit ring 20 on the inner side of the narrow tile.

Inner mold shrinkage limit block 18 guarantees that the inner mold shrinkage action is in place, so that the tire unloading process is carried out smoothly. Inner mold expansion limit end ring 27 ensures that the inner mold expansion action is in place, preventing the transmission mechanism from being subjected to excessive pressure due to insufficient oil cylinder action precision. The drum shoe limit mechanism completes the rigid mold clamping action on the drum shoe after the inner mold expands to prevent the drum shoe from shrinking radially under high vulcanization pressure during the vulcanization process. Wherein, the inner mold expansion limit end ring 27, the inner mold contraction limit block 18 and the upper limit ring 2 and the lower limit ring 20 of the drum tile limit mechanism are all made of steel metal materials.

Adopt the concrete steps of vulcanized tire of the present invention:

1) Tire loading: the inner mold contraction limit block 18 holds the piston rod 21 tightly, the inner mold is in a contracted state, and the green tire 11 to be vulcanized is placed on the vulcanization machine.

2) Shaping: the bottom plate limiter 24 remains still, the wedge block 15 descends together with the piston rod 21, until the inner mold expands and the bottom surface of the limit end ring 27 contacts the bottom plate limiter 24, at this time the inner mold is in the expanded state, Then the central mechanism moves down as a whole, and the inner mold and the tire blank 11 are placed on the lower steel ring 10 .

3) Mold closing: As shown in Figure 1, the drum tile is in the expanded state. At this time, the upper limit ring 2 and the lower limit ring 20 move down and up to the working position respectively to complete the rigid limit of the drum tile and prevent the vulcanization period. Excessive force on the surface of the drum tile causes the drum tile to retract.

4) Tire unloading: As shown in Figure 2, the outer mold rises to the designated position, the central mechanism rises as a whole, the inner mold shrinks until the inner mold shrinkage limit block 18 hugs the piston rod 21 tightly, the inner mold is in a contracted state, and the vulcanized tire is taken out.

Claims (1)

1. one kind has the tire vertical compression mould of limit function, comprise outer mold, inner mold, the spacing end ring of internal mold distending, internal mold contraction limited block and drum watt position-limit mechanism, outer mold comprises upper plate, epipleural, upper steel ring, middle die sleeve, arc seat, slide block, pattern block, lower steel ring, lower side panel, lower plate, inner mold comprises attachment screw, clamp ring, wedge, piston rod, wide watt of support, wide watt, narrow watt support, narrow watt, base plate position-arresting disk, and upper steel ring and epipleural, epipleural and upper plate are connected by screw; Upper plate has the T-shaped guide-track groove with slide block equivalent amount, and slide block is arranged on T-shaped guide-track groove, and is connected by screw with arc seat; Arc seat and pattern block are connected, and are connected by slant rail slide block mechanism with middle die sleeve; Lower plate and lower side panel, lower side panel and lower steel ring are connected by screw, wide watt is connected by screw with wide watt of support, wide watt of support coordinates transmission with base plate position-arresting disk and wedge respectively by guide rail slide block mechanism, narrow watt is connected by screw with narrow watt of support, narrow watt of support coordinates transmission with base plate position-arresting disk and wedge respectively by guide rail slide block mechanism, wedge is linked together by connecting bolt, clamp ring and piston rod, wedge rises with piston rod, moves down, wide watt and narrow watt of radial contraction under the cooperation of guide rail slide block mechanism, distending; It is characterized in that: the spacing end ring of internal mold distending is fixed by screws in the bottom of base plate position-arresting disk, be fixed with the internal mold identical with narrow wattage amount shrink limited block at narrow watt near piston rod side, internal mold shrinks limited block to be had and the arc surface of piston rod with diameter; Drum watt position-limit mechanism is made up of upper end position-limit mechanism and lower end position-limit mechanism; Upper end position-limit mechanism comprises upper limit ring, upper cylinder, upper piston rod, and lower end position-limit mechanism comprises lower limit ring, lower oil cylinder, lower piston rod; Upper limit ring with lower limit ring all has the slotting key identical with narrow wattage amount, insert key top lateral surface and there is the conical surface at an angle with narrow watt of edges co-operate, in the hole slot that slotting key mapping is offered in outer mold, lower limiting mechanism is identical with upper limit mechanism structure, up and down corresponding configuration; Upper limit ring, lower limit ring are connected with upper piston rod, lower piston rod respectively, and are driven respectively by upper cylinder, lower oil cylinder; Or upper cylinder and lower oil cylinder cylinder are replaced.