Method for ensuring building quality of engineering tire

Abstract

The invention discloses a method for guaranteeing the building quality of an engineering tire, and relates to the technical field of tires. By optimizing the flat drum construction design standard, adjusting the operation step sequence of a flat drum suction cup, optimizing the component attaching process and increasing the included angle design of a handheld electric heating knife, the abnormal problems that in the tire production process, due to the fact that the process step sequence design in the forming and manufacturing process is not reasonable, bubbles exist in components attached to a flat drum station, and assemblies are deviated are effectively solved; therefore, the abnormal quality problems such as air bubbles among parts, bead toe edges or fillets and the like are effectively avoided, and the quality stability and conformity in the production and manufacturing process of engineering tire products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tires, and in particular to a method for ensuring the molding quality of engineering tires. Background Art

[0002] In the current production process of engineering tires, the unreasonable design of the process steps in the molding manufacturing process has become an important factor affecting product quality. This unreasonable design is mainly reflected in the parts that are bonded at the flat drum station, and abnormal problems such as bubbles and component deviation often occur. These problems not only affect the appearance of the tire, but also have a serious impact on the performance of the tire.

[0003] First, bubbles exist in the parts being bonded at the flat drum station, which will cause bubbles to appear between the inner layers of the tire embryo. These bubbles cannot be completely eliminated during the tire vulcanization process, and will eventually cause the finished tire to be repaired or downgraded. Second, the skewness of the components will lead to unqualified distribution of tire toe material, which will affect the balance and wear resistance of the tire, thereby reducing the service life of the tire.

[0004] In addition, there is currently no effective way to identify abnormal problems such as bubbles between layers in the tire embryo and unqualified distribution of tire toe materials. This is mainly because these problems are difficult to detect before the tire is vulcanized, and only after vulcanization can the problems of the finished tire be seen. This makes it difficult to detect and solve these problems in time during the tire production process, thus affecting the overall quality of the tire.

[0005] Therefore, in order to improve the quality of engineering tires, the process steps of the molding and manufacturing process must be optimized to reduce the occurrence of abnormal problems such as bubbles and component deviation. Only in this way can the quality of the finished tires be ensured and the needs of users be met. Summary of the invention

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a method for ensuring the molding quality of engineering tires, by optimizing the flat drum construction design standards, adjusting the operating sequence of the flat drum suction cup, optimizing the component bonding process and increasing the angle design of the handheld electric hot knife, effectively improving the abnormal problems such as bubbles and component deviation caused by the components bonded at the flat drum station in the tire production process due to unreasonable process sequence design of the molding manufacturing process, thereby improving the stability and compliance of the quality of the production and manufacturing process of engineering tire products.

[0007] The technical solution of the present invention is:

[0008] The method for ensuring the quality of engineering tire molding is as follows: (1) when flat drum parts are bonded, the first part bonded is the wear-resistant rubber of the sub-mouth, and there is one on each side; after the parts are bonded, the airtight layer parts are bonded circumferentially, and when bonding the airtight layer parts, it is not necessary to use a flat drum suction cup for vacuum fixing;

[0009] (2) After the airtight layer and the inner lining layer assembly are bonded, a plastic pad is used to wrap the airtight layer or the inner lining layer assembly to be bonded from left to right or in the opposite direction, and then the back roller bonding step is performed;

[0010] (3) When laminating films at the flat drum station, after laminating one film, use a handheld flat roller to press the film with the plastic mat once, and then tear off the plastic mat on the film after pressing;

[0011] (4) The handle of the handheld electric knife is adjusted to a flat straight line shape, and the angle between the handle of the handheld electric knife and the handheld electric knife blade is 30°-45°, so that the cutting angle of the transition film is 30°-45°, and the transition film is cut according to the standard length and then butted.

[0012] Preferably, in step (2), the plastic mat has a width of 100-150 mm and a thickness of 0.07-0.1 mm.

[0013] Preferably, in step (2), the total width of the wound plastic mat cloth strips is greater than the width of the pressed component.

[0014] Preferably, in step (2), there are no gaps between the wrapped plastic mat strips.

[0015] Preferably, in step (2), after winding is completed, the two ends of the wound plastic mat are fixed to prevent the plastic mat from loosening during the pressing process.

[0016] Preferably, in step (2), after the airtight layer and the inner lining layer assembly are bonded together, a circumferential center line mark is made at the center of the assembly, and then the plastic pad cloth strip is wrapped around it.

[0017] Preferably, in step (3), if the film becomes uneven during the lamination process, the plastic pad can be torn off together with the plastic pad for adjustment.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention optimizes the flat drum construction design standard, adjusts the operation sequence of the flat drum suction cup, optimizes the component bonding process and increases the angle design of the handheld electric hot knife, thereby effectively improving the abnormal problems such as bubbles and component deviation in the components bonded at the flat drum station due to unreasonable process sequence design of the molding manufacturing process in the tire production process, effectively avoiding abnormal quality problems such as bubbles between component layers, tire toe edge or rounded corners caused by such problems, and improving the stability and compliance of the quality of the production and manufacturing process of engineering tire products. DETAILED DESCRIPTION

[0020] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0021] Example 1

[0022] This embodiment provides a method for ensuring the quality of engineering tire molding:

[0023] (1) When the flat drum parts are bonded, the first part to be bonded is the wear-resistant rubber on the left and right sides. After the parts are bonded, the airtight layer parts are bonded circumferentially. Since the width of the airtight layer parts can cover the wear-resistant rubber on both sides, the two ends of the airtight layer parts are fixed on the wear-resistant rubber on the left and right sides. Therefore, when bonding the airtight layer parts, it is no longer necessary to use a flat drum suction cup for vacuum fixing.

[0024] When the airtight layer and transition layer are bonded, at least two layers are generally designed. In this process, the flat drum suction cup is used to evacuate and fix the components, which can easily cause interlayer bubbles to appear at the suction cup position, that is, the suction cup is sunken at the height of the flat drum surface, and can only adsorb the first layer of components. The position where the first layer of components is fixed by vacuuming will be passively sunken, thus causing bubbles to appear between the first and second layers. After optimizing the flat drum construction in this embodiment, while ensuring that the total thickness of the sub-mouth wear-resistant rubber in the product material distribution remains unchanged (the sub-mouth wear-resistant rubber was previously bonded on the reverse drum, and now its mouth shape is divided into two pieces, one for flat drum bonding and one for reverse drum bonding), the airtight layer bonding process no longer needs to be vacuumed for fixing, so the interlayer bubble quality problem caused by vacuuming can be effectively avoided.

[0025] (2) After the airtight layer and inner lining layer components are bonded, the circumferential center line is marked at the center of the component according to the center light mark line. A plastic mat strip (the width of the plastic mat strip is 100 mm and the thickness is 0.1 mm) is used to wrap it around the airtight layer or inner lining layer component to be pressed from left to right or in the opposite direction. The total width of the wrapped plastic mat strip is greater than the width of the pressed component. There is no gap between the wrapped plastic mat strips, and the plastic mat strips are required to be fastened to the component. After the wrapping is completed, the two ends of the wrapped plastic mat strip are fixed with tape, and then the post-roller pressing step is performed. Since the plastic mat strip is used to fix the component in this process, it is not necessary to use a flat drum suction cup to vacuum and fix the component. After the pressing is completed, the wrapped plastic mat strip is removed, and the center line is checked to see if it coincides with the center light mark line, so as to confirm whether the component is skewed during the pressing process.

[0026] During the lamination process of the airtight layer and the inner lining layer components, the vacuuming action of the flat drum suction cup is cancelled to avoid the long-term force exerted by the vacuum suction cup on the first layer, which may cause the layers to separate and produce bubbles; and under the action of the plastic pad, the problem of component deviation is avoided.

[0027] (3) According to different product specifications, the flat drum station needs to laminate films of different widths and thicknesses. When laminating films, the plastic pad on the film is not torn off synchronously. After laminating one film, the film with the plastic pad is laminated once using a handheld flat roller. If the film is uneven during the lamination process, the plastic pad can be torn off together with the film for adjustment. This can effectively avoid uneven film stretching and air bubble problems during the process. After lamination, the plastic pad on the film can be torn off.

[0028] Because the tensile strength of the plastic mat is greater than that of the semi-finished parts, laminating the parts with the plastic mat can effectively avoid the problem of uneven stretching during the film laminating process. Laminating the parts with the plastic mat also facilitates rework of uneven areas to ensure the flatness of the parts, thus avoiding the problem of interlayer bubbles caused by uneven lamination.

[0029] (4) The handle of a handheld electric hot knife (35×260 electric hot knife, Taikaiying (Qingdao) Special Tire Technology Research and Development Co., Ltd.) is adjusted from a round shape to a flat straight shape, and the angle between the handle of the handheld electric hot knife and the handheld electric hot blade is 30°-45°, so that when the flat straight handle is held, the blade naturally tilts to 30°-45°, so that the cutting surface angle of the blade to the transition film is 30°-45°, and the transition film is cut according to the standard length and then butted.

[0030] After the handheld electric hot knife is equipped with an angle design, the transition film can be cut to standard length and then connected to ensure uniform thickness of the parts and improve the density of the joints.

[0031] Comparative Example 1

[0032] The difference from Example 1 is that in step (1), when the flat drum parts are bonded, the first part bonded is the airtight layer, but when the airtight layer is bonded, the front end of the airtight layer needs to be fixed by the suction cup on the flat drum using the vacuum function to complete the circumferential bonding of the airtight layer.

[0033] In Comparative Example 1, a flat drum suction cup is used to draw a vacuum to fix the airtight layer component, which easily causes interlayer bubbles to appear at the suction cup position, that is, the suction cup is sunken at the height of the flat drum surface and can only adsorb the first layer component. The position where the first layer component is fixed by vacuum will be passively sunken, thus causing bubbles to appear between the first layer and the second layer.

[0034] Comparative Example 2

[0035] The difference from Example 1 is that in step (2), after the air-tight layer and the inner lining layer assembly are pasted together, during the pressing process of the air-tight layer and the inner lining layer assembly, a flat drum suction cup is used to perform a vacuum operation to fix the position of the air-tight layer and the inner lining layer assembly.

[0036] In comparative example 2, a flat drum suction cup is used to fix the position of the airtight layer and the inner lining layer assembly. The force exerted by the vacuum suction cup on the first layer of the assembly for a long time may cause the layers to separate and generate bubbles.

[0037] Comparative Example 3

[0038] The difference from Example 1 is that in step (3), during the film lamination process, the plastic pad is torn while laminating the film. This lamination method easily causes uneven stretching of the film, uneven lamination of the film, and a large number of interlayer bubbles after lamination.

[0039] Comparative Example 4

[0040] The difference from Example 1 is that in step (4), the handheld electric hot knife is not improved, the handle is round, the cutting angle of the component is 90°, the transition film must be overlapped, and the thickness of the overlapping part is increased by 100%; and the component overlapping process will cause a large number of bubbles to exist at the edge of the joint.

Claims

1. A method for ensuring the quality of engineering tire molding, characterized in that: (1) When the flat drum parts are bonded, the first part to be bonded is the wear-resistant rubber of the sub-mouth, one on each side; after the parts are bonded, the circumferential bonding of the airtight layer parts is performed, and when bonding the airtight layer parts, it is not necessary to use the flat drum suction cup for vacuum fixing; (2) After the airtight layer and the inner lining layer assembly are bonded, a plastic pad is used to wrap the airtight layer or the inner lining layer assembly to be bonded from left to right or in the opposite direction, and then the back roller bonding step is performed; (3) When laminating films at the flat drum station, after laminating one film, use a handheld flat roller to press the film with the plastic mat once, and then tear off the plastic mat on the film after pressing; (4) The handle of the handheld electric knife is adjusted to a flat straight line shape, and the angle between the handle of the handheld electric knife and the handheld electric knife blade is 30°-45°, so that the cutting angle of the transition film is 30°-45°, and the transition film is cut according to the standard length and then butted.

2. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (2), the plastic mat has a width of 100-150 mm and a thickness of 0.07-0.1 mm.

3. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (2), the total width of the wrapped plastic padding strips is greater than the width of the pressed component.

4. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (2), there are no gaps between the wrapped plastic mat strips.

5. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (2), after winding is completed, the two ends of the wound plastic pad are fixed.

6. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (2), after the airtight layer and the inner lining layer assembly are bonded together, a circumferential center line is marked at the center of the assembly, and then a plastic pad cloth strip is wrapped around it.

7. The method for ensuring the molding quality of engineering tires according to claim 1, characterized in that: In step (3), if the film becomes uneven during the lamination process, it can be torn off together with the plastic pad for adjustment.