CN105171984A - Tire mold and manufacturing method thereof - Google Patents

Abstract

The invention discloses a tire mold, and belongs to the technical fields of molds. The tire mold comprises a mold body, wherein multiple steel sheets are arranged on the mold body, and are provided with multiple mounting holes penetrating through the steel sheets; pins are inserted in the mounting holes; the extension direction of the pins is perpendicular to the surfaces of the steel sheets; and the pins are embedded in the mold body. The invention further discloses a manufacturing method of the tire mold, which enables the steel sheets and the mold body are firmly combined together and are not easy to separate, prolongs the service life of the tire mold, and is widely applied to the manufacturing of the tire mold.

Description

A kind of tire mold and its manufacturing method

technical field

The invention relates to the technical field of molds, in particular to a tire mold and a manufacturing method thereof.

Background technique

The tire tread includes many grooves of different widths extending along the tire axis and one side thereof. These grooves can have a very large impact on the performance of the tire, especially in the braking performance of the tire and its ability to grip on slippery road surfaces. The narrower pattern groove on the tire tread is realized by the steel sheet provided on the pattern block where the tire mold contacts the tire. The shape, size and other characteristics of this steel sheet can have a significant impact on the grip performance and drainage performance of the tire.

The existing steel sheet is inlaid on the surface of the cast aluminum mold, and the reinforcement method often adopts the method of punching holes from the oblique side of the steel sheet to the above-mentioned steel sheet, and after inserting the pin for fixing into the above-mentioned hole, the insertion part of the above-mentioned pin The remaining concave holes are surfacing; or punch holes from the parting surface of the pattern block mold to the normal direction of the steel sheet, and then insert the fixing pins into the above holes, and leave the insertion part of the above pins The concave hole is surfacing, and then grinded on the grinder. The efficiency of drilling is relatively low, and because the steel sheet and mold materials are different, the drill bit rotates faster. When drilling to the steel sheet position, it is easy to break the drill bit, and the solder joints left by the drilling are compared with the deformation of the tire surface caused by drilling. Difficult to deal with.

In addition, in the patent No. 20058006091.9 "blade implantation method, tire vulcanization mold and blade", a method for implanting steel sheets in tread blocks is mentioned. This method uses powder sintering to form fine grooves and The implanted side of the steel sheet is bent or a bent incision is made, and the steel sheet is fixed through the bent part or the incision part. However, the cost of the powder sintering process of this solution is high.

Patent No. 200710113728.5, "Method for Implanting Steel Sheets in High Pressure Casting Tire Mold Blocks", mentions a method of implanting steel sheets during casting. This method only inserts the implanted steel sheets through small holes. Fixed on the mold surface.

In the above two solutions, after the tire has been vulcanized multiple times by the mold, the steel sheet will loosen or even fall off on the surface of the mold due to the flow and extrusion of the rubber material and the pulling force during the ejection. This will cause damage to the surface of the pattern block, and cause a large block of rubber on the surface of the vulcanized tire or uneven distribution of the tire pattern, which will affect the appearance and performance of the tire.

Therefore, for developing a new tire mold, changing the traditional structure not only has urgent research value, but also has good economic benefits and industrial application potential, which is the motivation and basis for the completion of the present invention.

Contents of the invention

In order to overcome the defects of the prior art pointed out above, the present inventor has conducted in-depth research on this, and completed the present invention after paying a lot of creative work.

Specifically, the technical problem to be solved by the present invention is to provide a tire mold, which can make the steel sheet and the mold body firmly bonded, not easy to fall off, and prolong the service life of the tire mold.

In order to solve the above technical problems, the technical solution of the present invention is to provide a tire mold, including a mold body, the mold body is provided with a number of steel sheets, and the steel sheets are provided with a number of mounting holes penetrating the steel sheets, A pin is inserted into the mounting hole, the extension direction of the pin is perpendicular to the surface of the steel sheet, and the pin is embedded in the mold body.

In the tire mold of the present invention, as a preferred technical solution, the shape of the pin is a U-shaped structure, the two legs of the pin are inserted into the mounting hole, and the seal of the pin The blocked end and the open end are respectively located on two sides of the steel sheet.

In the tire mold of the present invention, as a preferred technical solution, the shape of the pin is a columnar structure, the pin is provided with a cap for defining the position of the pin, and the cross-sectional area of the cap is larger than the The cross-sectional area of the mounting hole.

In the tire mold of the present invention, as a preferred technical solution, the pin and the steel sheet are welded or screwed together.

Another technical problem solved by the present invention is: to provide a tire mold manufacturing method, which can make the steel sheet and the mold body firmly bonded, not easy to fall off, and prolong the service life of the tire mold.

In the manufacturing method of the tire mold of the present invention, the following steps are included: (1) processing the base mold of the mold body, inserting the steel sheet into the steel sheet groove reserved on the base mold, and adjusting the steel plate at the same time. The depth position of the sheet on the base mold; (2) utilize the base mold to make a rubber mold, insert the steel sheet with the mounting hole into the corresponding steel sheet groove on the rubber mold, and then Reversely make a plaster mold, the steel sheet substrate with the mounting hole will expose the plaster mold; (3) insert the pin into the mounting hole; (4) fix the pin on the steel sheet; ( 5) casting the plaster mold embedded with the steel sheet into a tire mold, removing the gypsum after casting, and inserting the steel sheet matrix inside the mold body.

In the manufacturing method of the tire mold of the present invention, as a preferred technical solution, it further includes step (6), machining the mold after casting, and removing excess steel sheets.

In the manufacturing method of the tire mold of the present invention, as a preferred technical solution, in step (4), the shape of the pin is a U-shaped structure, and the two nail legs of the pin are inserted into the In the mounting hole, the plugged end and the open end of the pin are respectively located on both sides of the steel sheet.

In the manufacturing method of the tire mold of the present invention, as a preferred technical solution, in step (4), the shape of the pin is a columnar structure, and the pin is provided with a cap for defining the position of the pin , the cross-sectional area of the nail cap is greater than the cross-sectional area of the mounting hole.

In the manufacturing method of the tire mold of the present invention, as a preferred technical solution, the pin is welded or screwed together with the steel sheet.

After adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

(1) In the technical solution of the present invention, the steel sheet is firmly inlaid, and the supporting effect of the pin inside the mold body can effectively prevent the steel sheet from loosening during the vulcanization process due to the extrusion of the rubber material and the pulling force during the ejection , fall off, and damage the surface of the pattern block, resulting in flaws on the surface of the tire after vulcanization, which in turn affects the appearance and performance of the tire.

(2) The embedding efficiency of the present invention is high, and it can be inlaid in place in one step through casting without subsequent trimming, which improves the manufacturing efficiency of tire molds.

(3) Since the pin is perpendicular to the surface of the steel sheet, and the pin is firmly connected with the steel sheet, it can effectively prevent the steel sheet from loosening and falling off due to the extrusion of rubber material flow and the pulling force during mold ejection during the vulcanization process.

(4) Since a number of installation holes are provided on the steel sheet, pins can be inserted at suitable positions, which is beneficial to remove excess length of steel sheet after casting.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is a partially enlarged schematic diagram of A in Fig. 1;

Fig. 3 is the structural representation of steel sheet in the embodiment of the present invention;

Fig. 4 is a schematic structural view of a pin in Embodiment 1 of the present invention;

Fig. 5 is another schematic structural view of the pin in Embodiment 1 of the present invention;

Fig. 6 is a schematic diagram of the connection relationship between the pin and the steel sheet in Embodiment 2 of the present invention;

Fig. 7 is a schematic diagram of another connection relationship between the pin and the steel sheet in the second embodiment of the present invention;

Wherein, in FIG. 1 to FIG. 7 , each numeral signifies the following specific meanings, elements and/or components respectively.

Among the figure: 1, mold body, 2, steel sheet, 201, mounting hole, 202, steel sheet substrate, 3, pin, 301, nail leg, 302, plugging end, 303, nail cap.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. However, the uses and purposes of these exemplary embodiments are only used to illustrate the present invention, and do not constitute any form of limitation to the actual protection scope of the present invention, nor limit the protection scope of the present invention thereto.

Embodiment one:

As shown in Fig. 1, Fig. 2 and Fig. 3 together, the present invention provides a kind of tire mold, comprises mold body 1, and mold body 1 is provided with several steel sheets 2, and steel sheet 2 is provided with a plurality of penetrating steel sheets 2 Mounting hole 201, mounting hole 201 can design a row, also can design multiple rows, those skilled in the art can set by oneself according to need, do not limit here, the pin 3 is installed in the mounting hole 201, and the extension direction of pin 3 is perpendicular to On the surface of the steel sheet 2, the pin 3 is embedded in the mold body 1.

As shown in Figure 4 and Figure 5, the shape of the pin 3 is a U-shaped structure, and the two nail legs 301 of the pin 3 are inserted in the mounting hole 201. The two nail legs 301 can be the same in thickness or different in thickness. The length is the same, and the length can also be inconsistent, and it is not specifically limited here. The plugged end 302 and the open end of the pin 3 are respectively located on both sides of the steel sheet 2. 2 firmly bonded. The length of the blocking end 302 can be 1/n of the length of the entire pin 3, and the value of n can be variable, as long as the two nail legs 301 can be firmly connected together and the distance between the two nail legs 301 can be shortened and clamped Finally, it can be fixed in the mounting hole 201 of the steel sheet 2, and its length is preferably 1/20-1/2 of the entire pin 3 length.

Embodiment two:

As shown together in Figure 6 and Figure 7, the present invention provides a tire mold, its structure is basically the same as that of Embodiment 1, the difference is that the shape of the pin 3 is a columnar structure, and the pin 3 is provided with a mold for limiting the position of the pin 3. The nail cap 303, the shape of the nail cap 303 can be various shapes such as hemispherical, round pie, square, strip, triangle, etc., the cross-sectional area of the nail cap 303 is larger than the cross-sectional area of the mounting hole 201, and the nail cap 303 can be positioned on the pin The end of pin 3 can also be located in the middle of pin 3. Of course, from the analysis of the stress situation, when the nail cap 303 is arranged in the middle of pin 3, the force on both sides of pin 3 will be more uniform, and the fixation will be more firm and less difficult. Loosening occurs on the surface of the mold body 1 .

The pin 3 and the steel sheet 2 can be combined together by welding, and also can be combined together by screw connection.

Embodiment three:

As shown in Fig. 1 to Fig. 7 jointly, the present invention provides a kind of manufacturing method of tire mold, comprises the following steps:

(1) process the base mold of mold body 1, insert steel sheet 2 on the steel sheet slot reserved on the base mold, and adjust the depth position of steel sheet 2 on the base mold simultaneously;

(2) Utilize the base mold to make a rubber mold, insert the steel sheet 2 with the installation hole 201 into the corresponding steel sheet groove on the rubber mold, and then reverse it into a plaster mold, the steel sheet with the installation hole 201 The base body 202 will expose the plaster mold;

(3) Insert the pin 3 into the mounting hole 201;

(4) The pin 3 is fixedly connected to the steel sheet 2;

(5) cast the tire mold with the gypsum mold inlaid with the steel sheet 2, remove the gypsum after casting, and the steel sheet matrix 202 is embedded in the inside of the mold body 1;

(6) Machining the cast mold to remove excess steel sheet 2 .

It should be noted that the steel sheet 2 includes a part exposing the mold body 1 and a part embedded in the mold body 1, the part embedded in the mold body 1 is called the steel sheet matrix 202, and the mounting hole 201 is provided in the steel sheet on the substrate 202.

Wherein, in step (4), the shape of the pin 3 is a U-shaped structure, the two nail legs 301 of the pin 3 are inserted into the installation hole 201, and the blocked end 302 and the open end of the pin 3 are respectively located on the steel sheet 2 on both sides. When the two nail legs 301 shrink, the body of the steel sheet 2 will not shake and will not cause damage to the very brittle plaster.

Or, in step (4), the shape of the pin 3 is a columnar structure, the pin 3 is provided with a nail cap 303 for limiting the position of the pin 3, the cross-sectional area of the nail cap 303 is greater than the cross-sectional area of the mounting hole 201, and the pin 3 and the steel The pieces 2 are welded or screwed together. During spot welding, the main body of the steel sheet 2 will not shake and will not cause damage to the very brittle gypsum.

It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and/or variations to the present invention, and all these equivalent forms also fall within the appended claims of the present application. within the defined scope of protection.

Claims (9)

1. a tire-mold, comprise mold, described mold is provided with some steel discs, it is characterized in that, described steel disc is provided with some installing holes running through described steel disc, be fitted with pin in described installing hole, the bearing of trend of described pin is perpendicular to the surface of described steel disc, and described pin is flush-mounted in described mold.

2. a kind of tire-mold as claimed in claim 1, is characterized in that, the shape of described pin is U-shaped structure, and two nail legs of described pin are plugged in described installing hole, and the shutoff end of described pin and opening end lay respectively at the both sides of described steel disc.

3. a kind of tire-mold as claimed in claim 1, is characterized in that, the shape of described pin is column structure, and described pin is provided with the head of a nail for limiting pin location, and the sectional area of the described head of a nail is greater than the sectional area of described installing hole.

4. a kind of tire-mold as claimed in claim 3, is characterized in that, described pin welds with described steel disc or is threaded togather.

5. a manufacture method for tire-mold, is characterized in that, comprises the following steps: the basic mode that (1) processing mould is concrete, is inserted into by steel disc on steel disc groove reserved on described basic mode, adjusts the depth location of described steel disc on described basic mode simultaneously; (2) utilize described basic mode to produce rubber pattern, the described steel disc with installing hole is inserted in corresponding steel disc groove by described rubber pattern, and then instead make plaster mold, the steel disc matrix with described installing hole will expose described plaster mold; (3) described pin is inserted in installing hole; (4) pin is fixedly connected on steel disc; (5) will inlay the described plaster casting tire-mold of described steel disc, remove gypsum after casting, described steel disc matrix is embedded in the inside of mold.

6. the manufacture method of a kind of tire-mold as claimed in claim 5, is characterized in that, also comprises step (6), carries out machined to the mould after casting, removes the steel disc of additional length.

7. the manufacture method of a kind of tire-mold as claimed in claim 5, it is characterized in that, in step (4), the shape of described pin is U-shaped structure, two nail legs of described pin are plugged in described installing hole, and the shutoff end of described pin and opening end lay respectively at the both sides of described steel disc.

8. the manufacture method of a kind of tire-mold as claimed in claim 5, it is characterized in that, in step (4), the shape of described pin is column structure, described pin is provided with the head of a nail for limiting pin location, and the sectional area of the described head of a nail is greater than the sectional area of described installing hole.

9. the manufacture method of a kind of tire-mold as claimed in claim 8, is characterized in that, described pin welds with described steel disc or is threaded togather.