CN110815888B - Tire processing and forming method - Google Patents
Tire processing and forming method Download PDFInfo
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- CN110815888B CN110815888B CN201911129607.9A CN201911129607A CN110815888B CN 110815888 B CN110815888 B CN 110815888B CN 201911129607 A CN201911129607 A CN 201911129607A CN 110815888 B CN110815888 B CN 110815888B
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- tire
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- rubber
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- protrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
The invention discloses a tire processing and forming method, which comprises the steps of performing blank preforming, mold forming, vulcanization forming and the like in sequence, wherein a plurality of preforming grooves and preforming bulges are preprocessed on a rubber blank which is not processed by a mold so as to be correspondingly matched with each structure in a mold cavity of the mold so as to process corresponding tread pattern grooves and tread patterns, particularly, through the blank preforming process, rubber can be orderly guided and uniformly distributed, thereby effectively avoiding the phenomena that the rubber possibly flows when the subsequent mold processing and related forming processes are implemented, the rubber is formed at the edge part of the tread pattern ribs and deposited and the like, further avoiding the phenomena that the rubber at the local part of the tread pattern ribs and the like are raised and the like, effectively optimizing the rubber distribution structure at the tread pattern ribs of the processed and formed tire, and further obviously improving the performance and service life of the tire, and the performance of the whole vehicle is optimized correspondingly.
Description
Technical Field
The invention relates to the technical field of tire design, processing and manufacturing, in particular to a tire processing and forming method.
Background
The tire is the only contact part between the vehicle and the ground in the daily running process, so the performance of the tire directly influences the running performance of the whole vehicle. Among them, whether the stress distribution in the tire under ground contact state is uniform is one of the most important performance indexes, and especially for a tire with a thin NSB (acronym of Non-ski Base, that is, under-groove rubber thickness, which means the thickness of a rubber material below the main grooves of a tread pattern), the rubber layout design of each tire rib contacting with the ground should be ensured to be uniform and reasonable, so that the corresponding tire use performance can be ensured.
At present, in a forming process implemented in a tire processing process, a blank with relatively flat tread rubber is generally adopted for forming processing, but after subsequent vulcanization processing is carried out by the method, the rubber of the tread can flow to tread ribs, specifically, a large amount of rubber can form siltation in the boundary between two adjacent surfaces of the tread ribs, so that the thickness of the rubber in the whole interior of the tread ribs is not uniformly distributed, the grounding shape and the pressure distribution are not uniform during the rolling work of a subsequent tire, and the running performance of the tire is seriously influenced; and the rubber material forming the local deposition can generate a bulge at the junction of two adjacent surfaces of the tread ribs, so that the distribution space of the wear-resistant rubber layer on the outer wall of the tire at the junction is occupied, the wear-resistant rubber layer on the outer wall of the tire at the junction is thin, the tire is prone to generating premature wear in the subsequent use process, the rubber material inside the tire is exposed, the service life and the performance of the tire are severely limited, and adverse effects are caused on the running safety of the whole vehicle.
Therefore, how to optimize the distribution structure of the rubber at the ribs of the tire tread, avoid local accumulation of the rubber and local rubber bulge caused thereby, and improve the performance of the tire is an important technical problem to be solved by the technicians in the field at present.
Disclosure of Invention
The invention aims to provide a tire processing and forming method, which can effectively optimize the distribution structure of rubber at the ribs of the tire tread, avoid local accumulation of rubber and local rubber bulge caused by the local accumulation of the rubber and improve the performance of the tire.
In order to solve the technical problem, the invention provides a tire processing and forming method, which comprises the following steps:
performing a blank, namely performing the rubber blank in a pre-pressing manner by using a die casting machine to form the blank so that the blank is provided with a plurality of pre-forming grooves and pre-forming bulges which correspond to and are arranged in parallel with the tire forming die;
the method comprises the following steps of (1) forming a mould, namely feeding a blank subjected to pre-pressing forming into the mould, aligning and matching each pre-forming groove and each pre-forming protrusion with corresponding structures in the mould respectively, and then closing the mould to process and form the blank into a tire blank by the mould;
and (4) vulcanization molding, namely performing vulcanization treatment on the tire blank after the mold molding so as to stabilize and mold the external structure of the tire blank.
Preferably, any point on the transition section between the top point of the preformed protrusion and the two side edge portions of the preformed protrusion is taken as a middle section reference point, and the thickness of the rubber material corresponding to any group of middle section reference points is 60-80% of the thickness of the rubber material corresponding to the top point corresponding to the group of middle section reference points;
and taking any one point or two points on the pre-forming groove as a groove bottom reference point, wherein the thickness of the rubber material corresponding to the groove bottom reference point is D, and the thickness of the main groove bottom rubber of the tire after the mold is formed along the normal direction of the tire surface is D, and D/D is 0.7-0.9.
Preferably, the distance from the middle section datum point to the side edge of the preforming protrusion is L, a control end line parallel to the edge line of the top of the side wall of the main groove is taken from the pattern convex strip adjacent to one side of the tire main groove after the tire is formed by the mold, and the distance between the control end line and the edge line of the top of the side wall of the main groove in the extending direction of the tire tread is L, and then L/L is 0.2-0.25.
Preferably, the vertex of the preforming protrusion is located at the center of the preforming protrusion, an included angle between a connecting line of the vertex and the side edge of the preforming protrusion where the vertex is located and the normal direction of the tread is α, and an included angle between a tangent line at the vertex of the main groove side wall of the tire after the mold is molded and the normal direction of the tread is β, where β/α is 0.25 to 0.4.
Preferably, each preform channel is continuously spaced from each preform protrusion to provide the blank with a wave-shaped cross-section.
Preferably, both side edge portions of the blank have flat sections.
Compared with the background technology, the tire processing and forming method provided by the invention has the advantages that through the steps of blank pre-forming, mold forming, vulcanization forming and the like which are sequentially implemented, a plurality of pre-forming grooves and pre-forming bulges are pre-processed on a blank of rubber material which is not processed by a mold so as to be correspondingly matched with each structure in a mold cavity of the mold, so that corresponding tread pattern grooves and tread patterns are processed, particularly through the blank pre-forming process, the rubber material can be orderly guided and uniformly distributed, the phenomena that the rubber material flows and the rubber material is formed at the edge part of the tread patterns and deposited and the like possibly caused when the subsequent mold processing and related forming processes are implemented are effectively avoided, the phenomena that the rubber material is locally protruded and the like of the tread patterns and the like caused by the above steps are further avoided, the distribution structure of the rubber material at the tread patterns and the like of the processed and formed tire is effectively optimized, and the performance and the service life of the tire are obviously improved, and the performance of the whole vehicle is optimized correspondingly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method of tire building in accordance with one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a blank according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the blank in fig. 2 after being formed by a die.
Wherein 11-blank, 12-preformed groove, 121-groove bottom datum point, 13-preformed bulge, 131-vertex, 132-middle datum point and 14-flat section.
Detailed Description
The core of the invention is to provide a tire processing and forming method, which can effectively optimize the distribution structure of rubber at the ribs of the tire tread, avoid local accumulation of rubber and local rubber bulge caused by the local accumulation of rubber, and improve the performance of the tire.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, fig. 1 is a flow chart of a tire building method according to an embodiment of the present invention; fig. 2 is a schematic cross-sectional structure diagram of a blank according to an embodiment of the present invention.
In one embodiment of the present invention, the tire processing and molding method provided by the present invention comprises:
step 101: performing blank preforming;
and pre-pressing the rubber blank into a blank 11 by using a die casting machine, so that the blank 11 is provided with a plurality of pre-forming grooves 12 and pre-forming bulges 13 which correspond to and are arranged in parallel with the tire forming die.
Further, any point is taken as the middle reference point 132 on the transition section between the top point 131 of the preformed protrusion 13 and the two side edges of the preformed protrusion 13, so that the thickness of the glue material corresponding to any set of the middle reference points 132 is 60% -80% of the thickness of the glue material corresponding to the top point 131 corresponding to the set of the middle reference points 132; generally, if the width of the pre-formed groove 12 is small (for example, the width is less than 5mm), any point on the pre-formed groove 12 is taken as a groove bottom reference point 121, if the width of the pre-formed groove 12 is large (for example, the width is not less than 5mm), any two points on the pre-formed groove 12 are taken as a groove bottom reference point 121, the thickness of the glue material corresponding to the groove bottom reference point 121 is d, and the value range of d can be 2mm ≦ d ≦ 5mm under normal conditions; and D, if the thickness of the rubber at the bottom of the main groove of the tire after the mold molding along the normal direction of the tire surface is D, D/D is 0.7-0.9. Through the accurate control to the sizing material thickness and the relevant size of each summit 131, middle section datum point 132 and groove bottom datum point 121, can effectively guarantee that the structural size of blank 11 fully matches with the relevant structure of mould to make the shaping effect of its tread pattern slot and tread pattern rib after the follow-up shaping better, sizing material distribution and corresponding stress distribution are more even, thereby make the whole course of working of tire more accurate controllable, and product shaping effect and corresponding performance are better.
Specifically, the distance from the middle reference point 132 to the side edge of the pre-forming protrusion 13 is L, a control end line parallel to the edge line of the top of the sidewall of the main groove is taken from the pattern ridge adjacent to the side of the main groove of the tire after the mold is formed, and the distance between the control end line and the edge line of the top of the sidewall of the main groove along the extending direction of the tread is L, and L/L is 0.2-0.25. The control end line is the maximum limit position of the edge part of the main ditch after the tire is molded, and correspondingly, each corresponding linear position parallel to the control end line under the L span is the entity position corresponding to the theoretical molding interval range of the side wall edge part of the main ditch. Under general working conditions, the L can be preferably 0-2 mm. The size can ensure that the size of the middle section reference point 132 can achieve the optimal overall size control effect on the preforming protrusion 13, so that the overall preforming effect of the blank 11 is further optimized, the orderly and uniform distribution of rubber materials is ensured, and the product performance and the quality after the tire is formed are improved.
More specifically, the vertex 131 of the preforming protrusion 13 is located at the center of the preforming protrusion 13, and the angle between the connecting line of the vertex 131 and the side edge of the preforming protrusion 13 where the vertex 131 is located and the tread surface is α, for a general working condition, the value of α may be 20 ° or more and 50 ° or less, and the angle between the tangent line at the vertex of the main groove side wall of the tire after the mold molding and the tread surface normal is β, and β is 0.25 α to 0.4 α. The dimensional range and the mutual dimensional derivation relationship of the included angles alpha and beta can further improve the structural suitability between the blank 11 and the die, so that the subsequent forming effect is better. In practical applications, the angle sizes of α and β, and the thicknesses and distance sizes of the above mentioned rubber materials are not limited to those described herein, and workers can flexibly adjust relevant parameters according to actual product processing requirements and working conditions, and in principle, the angle sizes of α and β and the thicknesses and distance sizes of the above mentioned rubber materials can meet the operation requirements of the tire processing and molding method.
Further, each preform groove 12 is continuously provided at an interval from each preform protrusion 13 so that the cross section of the blank 11 is wavy. The stress distribution of this kind of wave structure is more even, and the shaping effect is better, and is higher with the degree of matching of tire shaping product effect and the mould adaptation demand under the most condition, can fully satisfy the product processing demand under the most operating mode. Of course, the sectional shape of the blank 11 in practical application is not limited to this, and the shape and structure of the blank 11 may have other forms according to the difference between the actual working conditions and the production requirements, and in principle, the shape and structure may be any shape and structure as long as the shape and structure can meet the actual operation requirements of the tire processing and forming method.
On the other hand, both side edge portions of the blank 11 have flat sections 14. During actual machining, the flat section 14 is a tire shoulder portion of the tire after being machined and formed, and a worker can also perform adaptive adjustment on the portion according to actual production requirements, which is not described herein.
Step 102: molding a mold;
the blank 11 after the preliminary press molding is fed into a mold, and the preform grooves 12 and the preform projections 13 are aligned and fitted to corresponding structures in the mold, respectively, and then the mold is closed to mold the blank 11 into a tire blank.
Step 103: vulcanization molding;
and (3) vulcanizing the tire blank after the mold is formed so as to stabilize and form the external structure of the tire blank. Specifically, after vulcanization, a hard, wear-resistant and impact-resistant structure is formed on the surface of the tire, and the structure and the internal rubber form functional differences, so that the use performance of the tire is further optimized.
In summary, the tire processing and forming method provided by the invention comprises the steps of performing blank preforming, mold forming, vulcanization forming and the like in sequence, wherein a plurality of preforming grooves and preforming protrusions are preformed on a rubber blank which is not subjected to mold processing so as to be correspondingly matched with each structure in a mold cavity of the mold, so that corresponding tread pattern grooves and tread patterns are processed, particularly, through the blank preforming process, rubber can be orderly guided and uniformly distributed, thereby effectively avoiding the phenomena that the rubber possibly flows and the rubber is deposited at the edge part of the tread patterns and the like when the subsequent mold processing and related forming processes are performed, further avoiding the phenomena that the rubber at the part of the tread patterns and the like are raised, effectively optimizing the rubber distribution structure at the processed and formed tire tread patterns, and further obviously improving the performance and the service life of the tire, and the performance of the whole vehicle is optimized correspondingly.
The tire processing and forming method provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (4)
1. A tire processing and forming method is characterized by comprising the following steps:
performing a blank, performing the blank by using a die casting machine to pre-press and form the blank with a rubber material blank to form the blank, so that the blank is provided with a plurality of preformed grooves and preformed protrusions which correspond to a tire forming die and are arranged in parallel, wherein any point on a transition section between the top point of the preformed protrusion and the two side edges of the preformed protrusion is taken as a middle section datum point, the thickness of the rubber material corresponding to any group of middle section datum points is 60% -80% of the thickness of the rubber material corresponding to the top point corresponding to the group of middle section datum points, any point or two points are taken as a groove bottom datum point on the preformed groove, the thickness of the rubber material corresponding to the groove bottom datum point is D, the thickness of the rubber at the bottom of the main groove of the tire formed by the die along the normal direction of the tire tread is D, D/D = 0.7-0.9, the distance from the middle section datum point to the side edge of the preformed protrusion where the preformed protrusion is located is l, and one convex strip adjacent to one side of the main groove of the tire formed by the die is taken as a convex strip adjacent to the side of the side edge of the main groove of the tire formed by the die A control end line parallel to the line, wherein the control end line is the maximum limit position of the edge part of the main groove after the tire is molded, and the distance between the control end line and the edge line of the top of the side wall of the main groove along the extending direction of the tire tread is L, and L/L = 0.2-0.25;
the method comprises the following steps of (1) forming a mould, namely feeding a blank subjected to pre-pressing forming into the mould, aligning and matching each pre-forming groove and each pre-forming protrusion with corresponding structures in the mould respectively, and then closing the mould to process and form the blank into a tire blank by the mould;
and (4) vulcanization molding, namely performing vulcanization treatment on the tire blank after the mold molding so as to stabilize and mold the external structure of the tire blank.
2. The tire building method according to claim 1, wherein: the vertex of the preforming protrusion is located at the center of the preforming protrusion, an included angle between a connecting line of the vertex and the side edge portion of the preforming protrusion where the vertex is located and the normal direction of the tire tread is alpha, an included angle between a tangent line at the vertex of the side wall of the main groove of the tire after the tire is molded by the mold and the normal direction of the tire tread is beta, and beta/alpha = 0.25-0.4.
3. The tire building method according to claim 1, wherein: each preforming groove and each preforming protrusion are continuously arranged at intervals, so that the cross section of the blank is wavy.
4. The tire building method according to claim 3, wherein: the two side edge portions of the blank have flat sections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129607.9A CN110815888B (en) | 2019-11-18 | 2019-11-18 | Tire processing and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129607.9A CN110815888B (en) | 2019-11-18 | 2019-11-18 | Tire processing and forming method |
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| CN110815888A CN110815888A (en) | 2020-02-21 |
| CN110815888B true CN110815888B (en) | 2021-11-16 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2261237A1 (en) * | 1996-07-22 | 1998-01-29 | The Goodyear Tire & Rubber Company | A tire tread having flow-through grooves |
| CN203372007U (en) * | 2013-07-02 | 2014-01-01 | 正新橡胶（中国）有限公司 | Pneumatic tire tread patterns capable of improving dry and wet land manoeuvrability of tire |
| CN106347033A (en) * | 2016-10-19 | 2017-01-25 | 安徽佳通乘用子午线轮胎有限公司 | UHP tire for promoting high speed and durability |
| KR101726450B1 (en) * | 2010-11-24 | 2017-04-12 | 스미토모 고무 고교 가부시키가이샤 | Heavy duty pneumatic tire |
| CN206155032U (en) * | 2016-10-19 | 2017-05-10 | 安徽佳通乘用子午线轮胎有限公司 | Improve UHP tire of arc at bottom of ditch |
| CN107415599A (en) * | 2017-09-06 | 2017-12-01 | 安徽佳通乘用子午线轮胎有限公司 | A kind of run-flat tire of the comfortable safety of simplified technique |
| CN206870765U (en) * | 2017-04-24 | 2018-01-12 | 安徽佳通乘用子午线轮胎有限公司 | A kind of UHP tires of the multi-functional tyre surface shape of the mouth as one speaks |
| CN109849393A (en) * | 2019-02-28 | 2019-06-07 | 安徽佳通乘用子午线轮胎有限公司 | A kind of manufacturing method standardizing tire |
-
2019
- 2019-11-18 CN CN201911129607.9A patent/CN110815888B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2261237A1 (en) * | 1996-07-22 | 1998-01-29 | The Goodyear Tire & Rubber Company | A tire tread having flow-through grooves |
| KR101726450B1 (en) * | 2010-11-24 | 2017-04-12 | 스미토모 고무 고교 가부시키가이샤 | Heavy duty pneumatic tire |
| CN203372007U (en) * | 2013-07-02 | 2014-01-01 | 正新橡胶（中国）有限公司 | Pneumatic tire tread patterns capable of improving dry and wet land manoeuvrability of tire |
| CN106347033A (en) * | 2016-10-19 | 2017-01-25 | 安徽佳通乘用子午线轮胎有限公司 | UHP tire for promoting high speed and durability |
| CN206155032U (en) * | 2016-10-19 | 2017-05-10 | 安徽佳通乘用子午线轮胎有限公司 | Improve UHP tire of arc at bottom of ditch |
| CN206870765U (en) * | 2017-04-24 | 2018-01-12 | 安徽佳通乘用子午线轮胎有限公司 | A kind of UHP tires of the multi-functional tyre surface shape of the mouth as one speaks |
| CN107415599A (en) * | 2017-09-06 | 2017-12-01 | 安徽佳通乘用子午线轮胎有限公司 | A kind of run-flat tire of the comfortable safety of simplified technique |
| CN109849393A (en) * | 2019-02-28 | 2019-06-07 | 安徽佳通乘用子午线轮胎有限公司 | A kind of manufacturing method standardizing tire |
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