Tire mold with replaceable pattern styles

Abstract

The present invention relates to the technical field of automobile tires. Disclosed is a tire mold with replaceable pattern styles. The mold uses a combined structure and comprises a pattern portion formed by two or more pattern block sub-bodies, side plate portions, and a base; the pattern styles of the two or more pattern block sub-bodies are different, and the pattern block sub-bodies are assembled on the base to form different pattern styles; each pattern block sub-body is formed by assembling a plurality of sub-bodies into an entire circumference; each sub-body is assembled into a dovetail slot of the base by means of a dovetail plate and is fixed by means of a bolt. The mold can produce various pattern styles, thereby reducing machining of pattern blocks or whole-set machining of two-section molds, and greatly saving the machining resources and machining cost of the mold.

Description

Tire molds with interchangeable tread patterns Technical Field

[0001] The invention relates to the technical field of automobile tires, in particular to a tire mold with replaceable tread patterns. Background Art

[0002] The tread pattern of a tire is not only the determining factor for its appearance, but also affects its traction, braking, cornering, drainage, and noise performance. It is mainly composed of grooves, blocks, and pitch.

[0003] Traditional tire molds primarily consist of a single tread block and its side panels. Different markets have varying demands for tread patterns, and a single set of molds can only produce tires with one tread pattern. To produce a different tread pattern, a new set of molds must be fabricated, consuming significant resources and increasing costs for tire manufacturers. Therefore, there is an urgent need to develop a tire mold with interchangeable tread patterns to overcome these shortcomings.

[0004] Therefore, in view of this, the inventor, based on many years of rich experience in design, development and actual production in the relevant industry, has researched and improved the existing structure and defects, and provided a tire mold with replaceable pattern styles.

[0005] Summary of the Invention

[0006] The present invention provides a tire mold with interchangeable tread patterns to improve the traditional tire mold proposed in the background art, which is mainly composed of a tread block and its side plate. Different markets have different demands for pattern styles, and the current set of molds can only produce tires with one pattern style. When a different pattern style needs to be produced, another set of molds needs to be newly processed, which not only consumes a lot of resources but also imposes high costs on tire manufacturers.

[0007] The present invention discloses a tire mold with a replaceable tread pattern, comprising: a plurality of groups of mold units, an upper top plate, a lower bottom plate, and a guide ring uniformly distributed along the circumference of the tire, wherein the upper top plate is provided at the upper end of the plurality of groups of mold units, the lower bottom plate is provided at the lower end of the plurality of groups of mold units, and the guide ring is provided between the upper top plate and the lower bottom plate and outside the plurality of groups of mold units. The mold unit comprises:

[0008] A pattern portion, the pattern portion comprising a plurality of pattern blocks arranged sequentially from top to bottom;

[0009] Two sets of side panels are arranged at intervals in an upper and lower direction, wherein the upper side panel contacts and cooperates with the uppermost pattern block among the plurality of pattern blocks, and the lower side panel contacts and cooperates with the lowermost pattern block among the plurality of pattern blocks, the upper side panel is connected to the upper top plate by bolts, and the lower side panel is connected to the lower bottom plate by bolts;

[0010] The base is arranged on the outside of the pattern part, the base is connected to the pattern part, and the upper and lower ends of the base are connected to the upper top plate and the lower bottom plate by bolts. The guide ring is arranged on the side of the base away from the pattern part, and the guide ring is in contact with the base, and the top of the guide ring is connected to the upper top plate by bolts.

[0011] Preferably, the pattern block is composed of a dovetail plate on the back and a pattern body, the dovetail plate is fixed in a dovetail groove by bolts on the back of the base, and the dovetail groove is arranged in the base.

[0012] Preferably, pattern blocks at the same height use the same type of pattern block sub-bodies.

[0013] Preferably, the number of pattern blocks at each position in the same vertical direction is at least 2, and the number of the pattern part and the base in the circumferential direction is not less than 1.

[0014] Preferably, the pattern portion is assembled into a whole in the circumferential direction through the base, and each pattern block at the same height is assembled into a whole in the circumferential direction.

[0015] Preferably, the length of the connection portion between the dovetail plate on the pattern block and its pattern body is at least 10% of the circumference of the pattern portion where it is located, and no longer than the circumference of the pattern portion where it is located.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG1 is a schematic structural diagram of a tire mold with replaceable tread patterns provided by an embodiment of the present invention;

[0019] FIG2 is a diagram showing the composition of a tread pattern in a tire mold with interchangeable tread patterns provided by an embodiment of the present invention;

[0020] FIG3 is a schematic diagram of a base dovetail groove in a tire mold with a replaceable tread pattern provided by an embodiment of the present invention;

[0021] FIG4 is a diagram illustrating the arrangement of the tread portion and the base circumference of a tire mold with interchangeable tread patterns provided by an embodiment of the present invention;

[0022] FIG5 is a force analysis diagram of the upper top plate in a tire mold with replaceable tread patterns provided by an embodiment of the present invention.

[0023] Figure numerals: 1. Pattern block one; 2. Pattern block two; 3. Pattern block three; 4. Pattern block four; 5. Upper top plate; 6. Pattern part; 7. Side plate part; 8. Base; 9. Dovetail plate; 10. Dovetail groove; 11. Lower bottom plate; 12. Pattern body; 13. Pattern body connecting part; 14. Guide ring. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present invention provides the following embodiments

[0027] Example 1

[0028] An embodiment of the present invention provides a tire mold with a replaceable tread pattern, as shown in Figures 1-4, comprising: a plurality of groups of mold units, an upper top plate 5, a lower bottom plate 11, and a guide ring 14 uniformly distributed along the circumference of the tire, wherein the upper top plate 5 is provided at the upper end of the plurality of groups of mold units, the lower bottom plate 11 is provided at the lower end of the plurality of groups of mold units, and the guide ring 14 is provided between the upper top plate 5 and the lower bottom plate 11 and outside the plurality of groups of mold units. The mold units include:

[0029] A pattern portion 6, the pattern portion 6 comprising a plurality of pattern blocks arranged sequentially from top to bottom;

[0030] Two sets of side panels 7 are arranged at intervals in an upper and lower direction, wherein the upper side panel 7 contacts and cooperates with the uppermost pattern block among the plurality of pattern blocks, and the lower side panel 7 contacts and cooperates with the lowermost pattern block among the plurality of pattern blocks. The upper side panel 7 is connected to the upper top plate 5 by bolts, and the lower side panel 7 is connected to the lower bottom plate 11 by bolts.

[0031] The base 8 is arranged on the outside of the pattern part 6, the base 8 is connected to the pattern part 6, and the upper and lower ends of the base 8 are connected to the upper top plate 5 and the lower bottom plate 11 by bolts. The guide ring 14 is arranged on the side of the base 8 away from the pattern part 6, and the guide ring 14 is in contact with the base 8, and the top of the guide ring 14 is connected to the upper top plate 5 by bolts.

[0032] Optionally, the pattern portion 6 is composed of a pattern block 1, a pattern block 2, a pattern block 3, and a pattern block 4, and the pattern block 1, the pattern block 2, the pattern block 3, and the pattern block 4 are arranged in sequence;

[0033] Optionally, the pattern block is composed of a dovetail plate 9 on the back and a pattern body 12. The dovetail plate 9 is fixed in the dovetail groove 10 by bolts on the back of the base 8. The dovetail groove 10 is arranged in the base 8, and the number of the dovetail plates 9 and the dovetail grooves 10 is greater than or equal to the number of pattern sub-bodies in the pattern part, and the number of bolts is greater than or equal to the number of dovetail grooves 10.

[0034] Optionally, the tread blocks at the same height use the same type of tread block sub-bodies, and the type of tread blocks at each position at the same height can be replaced, and one or more types can be used to combine different types of tire patterns.

[0035] Optionally, the number of pattern blocks at each position in the same vertical direction is at least 2, and the number of individual pattern parts 6 and base 8 in the circumferential direction is not less than 1.

[0036] Optionally, the pattern portion 6 is assembled into a whole in the circumferential direction through the base 8, and each pattern block at the same height is assembled into a whole in the circumferential direction.

[0037] Optionally, the length of the connection portion 13 between the dovetail plate 9 on the pattern block and its pattern body is at least 10% of the circumference of the pattern portion where it is located, and no longer than the circumference of the pattern portion where it is located.

[0038] The beneficial effects of the above technical solution are as follows: The present invention provides a tire mold with interchangeable tread patterns. This mold utilizes a composite structure comprising a tread portion 6 composed of two or more tread block sub-bodies, a side panel portion 7, and a base 8. The two or more tread block sub-bodies have different pattern patterns and can be assembled on the base 8 to form different patterns. Each tread block sub-body is assembled into a circular whole from multiple sub-bodies. Each sub-body is assembled into a dovetail groove 10 of the base 8 via a dovetail plate 9 and secured with bolts. This mold can produce a variety of pattern patterns, reducing the processing of tread blocks or the entire processing of the two-piece mold, significantly saving mold processing resources and costs.

[0039] Example 2

[0040] Based on Example 1, as shown in FIG5 , a tire mold with a replaceable tread pattern further includes:

[0041] Force sensor 1, used to detect the positive pressure exerted by the hydraulic device on the upper plate 5 during the mold closing process (during the mold closing process, the hydraulic device will exert a downward force on the upper plate 5 to help the mold close);

[0042] Force sensor 2, used to detect the reaction force exerted by the base 8 on the upper plate 5 during mold closing;

[0043] A controller and an alarm, wherein the controller is electrically connected to the first force sensor, the second force sensor, and the alarm;

[0044] The controller controls the alarm to operate based on the force sensor 1 and the force sensor 2, including the following steps:

[0045] Step 1: Calculate the deflection K1 of the upper surface of the top plate 5 according to formula (1) and the detection value of the force sensor 1:

[0046] Wherein, F1 is the detection value of the force sensor, S1 is the contact area between the hydraulic device and the upper plate 5, R is the maximum radius of the upper plate 5, r is the minimum radius of the upper plate 5, E is the elastic modulus of the upper plate 5, h is the thickness of the upper plate 5, μ is the Poisson's ratio (the value range is 0.4-0.6), λ is the friction coefficient between the hydraulic device and the upper plate 5 (the value range is 0.03-0.05), represents the bending stiffness of the upper top plate 5;

[0047] Step 2: Calculate the deflection K2 of the lower surface of the top plate 5 according to formula (2) and the detection value of the second force sensor;

[0048] Wherein, F2 is the detection value of force sensor 2, S2 is the contact area between the lower surface of the upper plate 5 and the side plate portion 7, a is the maximum radius of the side plate portion 7, S3 is the contact area between the base 8 and the upper plate 5, In is the natural logarithm with e as the base, δ is the thermal expansion coefficient of the tire mold (ranging from 1.1 to 1.4), σ is the fatigue strength safety factor of the base 8 (ranging from 0.85 to 1.5), and e is a natural constant;

[0049] Step 3: Calculate the difference c between the upper and lower surface deflections of the top plate 5 according to formula (3);

[0050] The controller compares the difference between the deflection of the upper surface and the deflection of the lower surface of the upper top plate 5 with a preset deflection difference range. When the actual deflection difference is lower than or exceeds the preset deflection difference range, the controller controls the alarm to sound an alarm; c = |K1-K2| (3)

[0051] Wherein, c is the difference between the deflection of the upper surface and the deflection of the lower surface of the upper top plate 5.

[0052] The beneficial effects of the above technical solution are as follows: the controller works based on the force sensor 1, firstly calculates the deflection of the upper surface of the upper top plate 5 according to formula (1), and by comprehensively considering the detection value of the force sensor 1, the contact area between the hydraulic device and the upper top plate 5, the maximum radius of the upper top plate 5, the minimum radius of the upper top plate 5, the elastic modulus of the upper top plate 5, the thickness of the upper top plate 5, the Poisson's ratio, and the friction coefficient between the hydraulic device and the upper top plate 5, the calculation result is more accurate and reliable;

[0053] Then, according to formula (2), the second detection value of the force sensor is comprehensively considered, the contact area between the lower surface of the upper plate 5 and the side plate portion 7, the maximum radius of the side plate portion 7, the contact area between the base 8 and the upper plate 5, the thermal expansion coefficient of the tire mold, the fatigue strength safety factor of the base 8 material, and the natural constant, so that the calculation result is more accurate and reliable;

[0054] Finally, by calculating the difference between the upper and lower surface deflections of the upper top plate 5, a certain value is obtained. The controller controls the operation of the force sensor 1 and the force sensor 2. The controller compares the difference between the upper and lower surface deflections of the upper top plate 5 with the preset deflection difference range. When the actual deflection difference is lower than or exceeds the preset deflection difference range (which will cause the tire mold to deform, further causing the shape and size of the produced tire to be inaccurate, affecting product quality), the controller controls the alarm to sound an alarm, reminding the staff to promptly replace the mold material with greater strength or thickness, and promptly monitor and control the difference between the upper and lower surface deflections of the mold to ensure the normal production of the tire mold and product quality, thereby meeting the user's demand for this type of tire mold with replaceable pattern.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tire mold with replaceable tread patterns, characterized in that, Including: A number of groups of die units evenly distributed along the circumferential direction of the tire, an upper top plate (5), a lower bottom plate (11), and a guide ring (14). The upper top plate (5) is arranged at the upper ends of the number of groups of die units, the lower bottom plate (11) is arranged at the lower ends of the number of groups of die units, and the guide ring (14) is arranged between the upper top plate (5) and the lower bottom plate (11) and on the outer side of the number of groups of die units. The die unit includes: A tread part (6), and the tread part (6) includes a number of tread blocks arranged in sequence from top to bottom; Two groups of side plate parts (7) arranged at intervals up and down. The upper side plate part (7) is in contact and cooperation with the uppermost tread block among the number of tread blocks, and the lower side plate part (7) is in contact and cooperation with the lowermost tread block among the number of tread blocks. The upper side plate part (7) is connected to the upper top plate (5) by bolts, and the lower side plate part (7) is connected to the lower bottom plate (11) by bolts; A base (8), the base (8) is arranged on the outer side of the tread part (6), the base (8) is connected to the tread part (6), and the upper and lower ends of the base (8) are connected to the upper top plate (5) and the lower bottom plate (11) by bolts. The guide ring (14) is arranged on the side of the base (8) away from the tread part (6), and the guide ring (14) is in contact and cooperation with the base (8), and the top end of the guide ring (14) is connected to the upper top plate (5) by bolts.

2. The tire mold with replaceable pattern styles according to claim 1, characterized in that, The tread block is composed of a dovetail plate (9) on the back and a tread body (12). The dovetail plate (9) is fixed in a dovetail groove (10) through a bolt on the back of the base (8), and the dovetail groove (10) is arranged in the base (8).

3. The tire mold with replaceable tread patterns according to claim 2, characterized in that, The tread blocks at the same height use the same type of tread block sub-body.

4. A tire mold with a replaceable tread pattern according to claim 1, characterized in that the number of divisions of the tread blocks at each position in the same vertical direction is at least 2, and the number of individuals of the tread part (6) and the base (8) in the circumferential direction is not less than 1.

5. A tire mold with replaceable tread patterns according to claim 1, characterized in that, The tread part (6) is assembled into a whole in the circumferential direction through the base (8), and each tread block at the same height is assembled into a whole in the circumferential direction.

6. The tire mold with replaceable tread patterns according to claim 1, characterized in that, The length of the connection part (13) between the dovetail plate (9) on the tread block and its tread body is at least 10% of the circumferential length of the tread part where it is located, and at most does not exceed the circumferential length of the tread part where it is located.

Images