A tread component preparation device and method and a non-pneumatic tire tread molding method

Abstract

The present invention discloses a tread component preparation device and method and a non-pneumatic tire tread forming method. According to the objective problems existing in actual processing, corresponding through-type air holes are opened on the tread base plate, and then the lower template and the upper template are arranged to form a casting cavity composed of a pumping cavity and a suction cavity, and then the positive pressure, negative pressure and pressurized processing technology are combined to solve the problem of missing materials at corners in the tread preparation process, thereby more accurately controlling the tread medium filling amount and improving the consistency of the tread. At the same time, it can also effectively avoid the generation of bubbles in the pouring process and avoid the looseness of the tread inside, thereby improving the strength of the tread, and making it have better adhesion to prevent the tread from separating from the base plate and improve the durability of the tire. Finally, the segmented splicing method can reduce the scrap rate and improve production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of tires, and in particular relates to a tread component preparation device and method and a non-pneumatic tire tread molding method. Background Art

[0002] Traditional pneumatic tires are vulcanized tires fixed on the wheel hub to form the vehicle's wheel, while non-pneumatic tires require the tread to be glued to the structure of the outer rim through bonding. If there is a bulge problem during the bonding process, it will greatly affect the yield.

[0003] Although the existing non-pneumatic tires have been developed and designed, their corresponding supporting process and processing methods have not yet formed relevant industrial designs. Therefore, it is one of the problems that urgently need to be solved. Summary of the invention

[0004] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0005] The present invention provides a tread component preparation device and method, and a non-pneumatic tire tread molding method, which are applicable to the processing and manufacturing device, equipment and method of non-pneumatic tires. The above design can effectively improve the yield rate of non-pneumatic tires and greatly improve their processing efficiency and quality effects.

[0006] The present invention discloses a tread component preparation device, comprising:

[0007] The lower template and the upper template are detachably connected to form a closed or open casting cavity; the lower template is provided with a tread groove adapted to the tread end of the tread bottom plate to be processed to form a tire tread structure; the inner end surface of the upper template is in contact with the back end of the tread bottom plate to be processed;

[0008] A first pumping pipeline, the outer end of which is externally connected to a first pumping unit, and the inner end of which extends into a pumping cavity between the lower template and the tread end;

[0009] A second pumping pipeline, the outer end of which is externally connected to a second pumping unit, and the inner end of which extends into the suction cavity between the upper template and the back end;

[0010] Through the pumping pressure difference between the first pumping unit and the second pumping unit, the pumped tread medium enters the suction cavity from the pumping cavity through the through-type air holes on the tread base plate to be processed, so as to be filled in the casting cavity.

[0011] In some embodiments, the first pumping pipeline and the second pumping pipeline are both disposed through the upper template, and the first pumping pipeline extends into the casting cavity through the air hole.

[0012] In some embodiments, the upper template is embedded in the upper opening structure of the lower template.

[0013] In some embodiments, it further comprises:

[0014] A sealing member is provided between the lower template and the upper template and between the casting cavity and the tread bottom plate to be processed.

[0015] In some embodiments, it further comprises:

[0016] The downward pressing module is in contact with the upper template to generate downward pressure, so that a closed connection is formed between the lower template and the upper template.

[0017] In some embodiments, the pressing module comprises:

[0018] A pressure rod groove is provided on the side of the lower template;

[0019] A pressure rod is arranged to penetrate the pressure rod groove.

[0020] In some embodiments, the pressing module further comprises:

[0021] A pressure block, arranged at the inner end of the pressure rod;

[0022] The pressing block groove and the pressing rod groove are arranged at the outer end surface of the upper template in a cross structure and are respectively matched with the pressing block and the pressing rod.

[0023] A method for preparing a tread component, comprising the tread component preparation device according to any one of the above embodiments, comprising the following steps:

[0024] S1. A positive pressure state is formed in the casting cavity through a pumping pressure difference between the first pumping unit and the second pumping unit, tread medium is injected into the pumping cavity and the tread medium flows into the suction cavity through the air hole to complete the filling of the casting cavity.

[0025] S2, closing the first pumping pipeline and starting the second pumping unit to form a negative pressure state in the casting cavity, thereby precipitating bubbles in the tread medium filled in the casting cavity;

[0026] S3, close the second pumping pipeline, start the first pumping unit, replenish the tread medium missing in the casting cavity after the bubbles are precipitated in step S2 and continue to pressurize it, so that the tread medium is filled in the casting cavity by pressurization, and then the tread medium is in close contact with the tread end of the tread base plate to be processed.

[0027] In some embodiments, wherein,

[0028] In step S1, the pouring flow rate is controlled to be 0.1-0.2 L / s;

[0029] In step S2, the negative pressure in the casting cavity is controlled to be maintained between 0.39-0.45 MPa, and the negative pressure environment in the casting cavity is maintained for 20-30 minutes;

[0030] In step S2, the pressure in the casting cavity is controlled to be maintained between 0.39-0.45 MPa and maintained for 15-20 minutes.

[0031] A method for forming a non-pneumatic tire tread, comprising a plurality of tread components and an outer rim made by the tread component preparation method according to any one of the above embodiments;

[0032] The multiple tread components are spliced ​​in sequence on the outer end surface of the outer rim, and the contact surface between adjacent tread components is set as an inclined structure. Side plates are provided on both sides of each tread component. The side plates extend to the side ends of the outer rim and are provided with bottom plate connecting bolt holes. Each tread component is fixedly installed on the outer rim through the bottom plate connecting bolt holes.

[0033] Compared with the prior art, the present invention has the following advantages: it solves the problem of poor adhesion between the tread and the tread base plate, material shortage and easy falling off caused by the influence of the spatial curved surface during the tread casting process of the non-pneumatic tire tread component, thereby achieving the purpose of improving product quality and extending product service life.

[0034] According to the objective problems existing in actual processing, corresponding through-type air holes are opened on the tread bottom plate, and then the lower template and the upper template are set to form a casting cavity composed of a pumping cavity and a suction cavity, and then combined with the positive pressure, negative pressure and pressurized processing technology, it can not only solve the problem of missing materials at corners in the tread preparation process, so as to more accurately control the tread medium filling amount and improve the consistency of the tread, but also effectively avoid the generation of bubbles during the pouring process, avoid the looseness of the tread inside, thereby improving the strength of the tread, and making it have better adhesion to prevent the tread from separating from the bottom plate and improve the durability of the tire. Finally, the use of segmented splicing can reduce the scrap rate and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0036] Figure 1 It is an exploded view of the tread member preparation device of the present invention.

[0037] Figure 2 It is a schematic diagram of the three-dimensional structure of the tread component preparation device of the present invention.

[0038] Figure 3 It is a schematic structural diagram of the tread component of the present invention.

[0039] Figure 4 It is a schematic diagram of the installation structure of the tread component of the present invention.

[0040] Figure 5 It is a schematic diagram of the splicing structure of the non-pneumatic tire tread of the present invention.

[0041] Description of the drawings: tread base plate 1, through hole 2, lower template 3, upper template 4, first pumping unit 5, second pumping unit 6, first pumping pipeline 7, second pumping pipeline 8, regulating valve 9, base plate connecting bolt hole 10, pressure rod groove 11, pressure rod 12, pressure block 13, pressure block groove 14, pressure rod groove 15. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0043] Obviously, the drawings described below are only some examples or embodiments of the present invention. For ordinary technicians in this field, the present invention can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed by the present invention, some changes in design, manufacturing or production based on the technical content disclosed by the present invention are just conventional technical means, and should not be understood as insufficient content disclosed by the present invention.

[0044] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present invention may be combined with other embodiments without conflict.

[0045] A tread component preparation device, comprising:

[0046] The lower template 3 and the upper template 4 are detachably connected to form a closed or open casting cavity; the lower template 3 is provided with a pattern groove adapted to the tread end of the tread base plate 1 to be processed to form a tire pattern structure; the inner end surface of the upper template 4 is in contact with the back end of the tread base plate 1 to be processed;

[0047] A first pumping pipeline 7, whose outer end is externally connected to a first pumping unit 5, and whose inner end extends into the pumping cavity between the lower mold plate 3 and the tread end;

[0048] A second pumping pipeline 8, whose outer end is externally connected to a second pumping unit 6, and whose inner end extends into the suction cavity between the upper template 4 and the back end;

[0049] Through the pumping pressure difference between the first pumping unit 5 and the second pumping unit 6, the pumped tread medium enters the suction cavity from the pumping cavity through the through-type air holes on the tread base plate 1 to be processed, so as to be filled in the casting cavity.

[0050] A method for preparing a tread component, comprising the above-mentioned tread component preparation device, and the specific steps are:

[0051] S1. A positive pressure state is formed in the casting cavity through the pumping pressure difference between the first pumping unit 5 and the second pumping unit 6. The tread medium is injected into the pumping cavity and flows into the suction cavity through the air hole to complete the filling of the casting cavity.

[0052] S2, closing the first pumping pipeline 5, starting the second pumping unit 6, so that a negative pressure state is formed in the casting cavity, thereby precipitating bubbles existing in the tread medium filled in the casting cavity;

[0053] S3, close the second pumping pipeline 8, start the first pumping unit 5, replenish the tread medium missing in the casting cavity after the bubbles are precipitated in step S2 and continue to pressurize it, so that the tread medium is filled in the casting cavity by pressurization, and then the tread medium is in close contact with the tread end of the tread base plate 1 to be processed.

[0054] The core of the above scheme is that corresponding through-type air holes are set on the tread base plate 1 to realize the conduction between the pumping chamber and the suction chamber. The tread medium injected first is gradually filled into the pumping chamber, and then enters the suction chamber through the air holes. At this time, the basic pouring process is completed. At the same time, the tread medium is also filled into the air holes, which increases the contact area between the tread medium and the tread base plate 1, thereby improving the bonding effect. Specifically, in step S1, the pouring flow rate is controlled to 0.1-0.2L / s to ensure that the tread medium is filled slowly to avoid the generation of bubbles. After completing the initial pouring process, a negative pressure suction process is started, and the bubbles are sucked out by using the adsorption force of the negative pressure and the buoyancy of the bubbles themselves. To ensure that the adsorption pressure does not have a significant impact on the tread medium, the negative pressure in the pouring cavity is maintained between 0.39-0.45MPa. At the same time, the negative pressure environment in the pouring cavity is maintained for 20-30 minutes to ensure that all bubbles are extracted. After completing the above process, the last step of pressurized filling is performed. First, the small amount of tread medium taken away in step S2 is replenished, and second, pressurization is used to improve the contact effect. At this time, the pressurized air pressure in the pouring cavity is controlled to be maintained between 0.39-0.45MPa and maintained for 15-20 minutes.

[0055] After completing the above work and coordinating with other processes, the tire pattern structure processing steps of one tread base plate 1 can be completed. At this time, the processing operation of the next tread base plate 1 can be carried out.

[0056] In some embodiments, the first pumping pipeline 7 and the second pumping pipeline 8 are both set through the upper template 4, and the first pumping pipeline 7 extends into the casting cavity through the air hole. Specifically, the suction chamber is set at the upper part, and the casting cavity is set at the lower part. This is because the negative pressure suction process mainly pumps gas. At the same time, in order to facilitate the control connection of the pipeline, the first pumping pipeline 7 and the second pumping pipeline 8 are set on the same side, and the first pumping pipeline 7 can extend into the casting cavity through the air hole itself, which does not increase the complexity of its processing. Corresponding regulating valves 9 are set on the first pumping pipeline 7 and the second pumping pipeline 8 to adjust and control the pipeline. At the same time, corresponding pressure sensing units and digital display units can also be configured to perform digital full-process monitoring to improve processing accuracy.

[0057] In some embodiments, considering the sealing of the entire mold, the upper template 4 is embedded in the upper opening structure of the lower template 3, and corresponding seals are provided. Specifically, the seals are provided between the lower template 3 and the upper template 4 and between the casting cavity and the tread base plate 1 to be processed.

[0058] In some embodiments, it also includes:

[0059] The downward pressing module generates downward pressure by abutting against the upper template 4 , so that a sealed connection is formed between the lower template 3 and the upper template 4 .

[0060] Specifically, the down pressure module includes:

[0061] A pressure rod groove 11 is provided on the side of the lower template 3;

[0062] A pressure rod 12 is arranged to penetrate the pressure rod groove 11;

[0063] A pressure block 13 is provided at the inner end of the pressure rod 12;

[0064] The pressing block groove 14 and the pressing rod groove 15 are arranged at the outer end surface of the upper mold plate 4 in a cross structure, and are respectively adapted to the pressing block 13 and the pressing rod 12. Furthermore, the arrangement of the pressing block groove 14 and the pressing rod groove 15 can stably provide downward pressure and ensure the downward pressure effect.

[0065] Through the above structure, using the lever principle, a certain downward pressure can be applied to the upper template 4 to ensure the safety and reliability of the processing process. At the same time, it is also convenient to open. Similarly, the structure of the pressing module can also adopt other methods such as mechanical automation structure.

[0066] A method for forming a non-pneumatic tire tread, comprising a plurality of tread components and an outer rim made by the tread component preparation method of any one of the above embodiments;

[0067] Multiple tread components are spliced ​​in sequence on the outer end surface of the outer rim, and the contact surface between adjacent tread components is an inclined structure. Side plates are provided on both sides of each tread component. The side plates extend to the side ends of the outer rim and are provided with bottom plate connecting bolt holes 10. Each tread component is fixedly installed on the outer rim through the bottom plate connecting bolt holes 10.

[0068] A plurality of tread components manufactured in the aforementioned processing method are assembled on the outer rim, thereby completing the covering of the outer rim to form a complete non-pneumatic tire tread structure; the processing cost in the production process is reduced by splicing, and only a single tread component that fails in processing needs to be processed twice, without causing the need to reprocess the entire non-pneumatic tire.

[0069] 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 substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tread member preparation device, characterized in that: include: A lower formwork and an upper formwork, which are detachably connected to form a closed or open casting cavity; The lower template is provided with a groove adapted to the tread end of the tread bottom plate to be processed to form a tire pattern structure; the inner end surface of the upper template is in contact with the back end of the tread bottom plate to be processed; A first pumping pipeline, the outer end of which is externally connected to a first pumping unit, and the inner end of which extends into a pumping cavity between the lower template and the tread end; A second pumping pipeline, the outer end of which is externally connected to a second pumping unit, and the inner end of which extends into the suction cavity between the upper template and the back end; Through the pumping pressure difference between the first pumping unit and the second pumping unit, the pumped tread medium enters the suction cavity from the pumping cavity through the through-type air holes on the tread base plate to be processed, so as to be filled in the casting cavity. 2 . The tread member preparation device according to claim 1 , wherein the first pumping pipeline and the second pumping pipeline are both arranged through the upper template, and the first pumping pipeline extends into the casting cavity through the air hole. 3 . The tread member preparation device according to claim 1 , wherein the upper template is embedded in the upper opening structure of the lower template.

4. The tread member preparation device according to claim 1, further comprising: A sealing member is provided between the lower template and the upper template and between the casting cavity and the tread bottom plate to be processed.

5. The tread member preparation device according to claim 1, further comprising: The downward pressing module is in contact with the upper template to generate downward pressure, so that a closed connection is formed between the lower template and the upper template.

6. The tread member preparation device according to claim 5, wherein the pressing module comprises: A pressure rod groove is provided on the side of the lower template; A pressure rod is arranged to penetrate the pressure rod groove.

7. The tread member preparation device according to claim 6, wherein the pressing module further comprises: A pressure block, arranged at the inner end of the pressure rod; The pressing block groove and the pressing rod groove are arranged at the outer end surface of the upper template in a cross structure and are respectively matched with the pressing block and the pressing rod.

8. A method for preparing a tread component, characterized in that: The tread member preparation device according to any one of claims 1 to 7 comprises the following steps: S1. A positive pressure state is formed in the casting cavity through a pumping pressure difference between the first pumping unit and the second pumping unit, tread medium is injected into the pumping cavity and the tread medium flows into the suction cavity through the air hole to complete the filling of the casting cavity. S2, closing the first pumping pipeline and starting the second pumping unit to form a negative pressure state in the casting cavity, thereby precipitating bubbles in the tread medium filled in the casting cavity; S3, close the second pumping pipeline, start the first pumping unit, replenish the tread medium missing in the casting cavity after the bubbles are precipitated in step S2 and continue to pressurize it, so that the tread medium is filled in the casting cavity by pressurization, and then the tread medium is in close contact with the tread end of the tread base plate to be processed.

9. The method for preparing a tread member according to claim 8, characterized in that: In step S1, the pouring flow rate is controlled to be 0.1-0.2 L / s; In step S2, the negative pressure in the casting cavity is controlled to be maintained between 0.39-0.45 MPa, and the negative pressure environment in the casting cavity is maintained for 20-30 minutes; In step S2, the pressurized air pressure in the casting cavity is controlled to be maintained between 0.39-0.45 MPa and maintained for 15-20 minutes.

10. A method for forming a non-pneumatic tire tread, characterized in that: comprising a plurality of tread members and an outer rim manufactured by the tread member manufacturing method according to any one of claims 8 and 9; The multiple tread components are spliced ​​in sequence on the outer end surface of the outer rim, and the contact surface between adjacent tread components is set as an inclined structure. Side plates are provided on both sides of each tread component. The side plates extend to the side ends of the outer rim and are provided with bottom plate connecting bolt holes. Each tread component is fixedly installed on the outer rim through the bottom plate connecting bolt holes.

Images