A replaceable matrix tire mold

Abstract

The application discloses a replaceable movable type block tire mold, which comprises a side plate, a first installation cavity and a second installation cavity are arranged in the side plate, the first installation cavity is provided with a first opening, a movable type block assembly is installed in the first installation cavity, a limiting assembly is installed in the second installation cavity, when the limiting assembly cooperates with the movable type block assembly, the limiting assembly limits the movable type block assembly from separating from the first installation cavity through the first opening, when the limiting assembly is disengaged from the cooperation with the movable type block assembly, the limiting assembly releases the limitation on the movable type block assembly, so that the movable type block assembly can extend out of the first opening. The tire mold provided by the application does not need to be operated at the bottom of the side plate for dismounting the movable type block assembly, and only needs to switch the cooperation and connection relationship between the limiting assembly in the second installation cavity and the movable type block assembly. Meanwhile, the installation mode of the movable type block assembly and the side plate does not need additional fasteners.

Description

Technical Field

[0001] This application belongs to the field of tire manufacturing technology, and in particular relates to a tire mold with replaceable movable blocks. Background Technology

[0002] The automotive industry is developing rapidly, and the requirements for appearance are becoming increasingly stringent. Tires are a crucial component of automotive parts. Tire molds typically have replaceable parts on the sidewall that can display different appearances or technical parameters. Currently, these parts are secured with bolts to the back of the tire mold sidewall. However, when manufacturing different tire models and specifications, the sidewall information varies, necessitating the replacement of these parts. This current method requires disassembling the mold sidewall, removing the bolts on the back of the sidewall, using tools to eject the parts, and then securing the replacement parts with bolts. Furthermore, replacing the tire mold sidewall parts during production requires removing the tire mold from the vulcanizing machine, replacing the parts, and then reinstalling the mold. A preheating period is required before vulcanizing production can resume. This entire process is cumbersome and impacts vulcanization efficiency. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a tire mold with replaceable movable blocks.

[0004] The specific technical solution provided in this application is as follows:

[0005] A tire mold with replaceable type blocks, comprising:

[0006] A side panel having an opposing top and bottom, the top being close to the tire and the bottom being away from the tire; the side panel also having opposing first and second sides; the side panel having an opening therein:

[0007] A first mounting cavity having a first opening located at the top of the side plate; a second mounting cavity having a second opening located on a first side of the side plate; the second mounting cavity communicating with the first mounting cavity on a second side;

[0008] The movable type assembly is installed in the first mounting cavity;

[0009] A limiting component is installed in the second mounting cavity;

[0010] When the limiting component engages with the movable type component, the limiting component restricts the movable type component from disengaging from the first opening into the first mounting cavity; when the limiting component disengages from the movable type component, the limiting component releases the restriction on the movable type component, allowing the movable type component to extend out from the first opening.

[0011] In some embodiments of this application, the tire mold further includes: a first elastic element located in the first mounting cavity and at the bottom of the type block assembly;

[0012] When the limiting component engages with the movable type assembly, the first elastic element is compressed at the bottom of the movable type assembly; when the limiting component disengages from the movable type assembly, it releases its restriction on the movable type assembly, allowing the movable type assembly to extend out from the first opening under the elastic restoring force of the first elastic element.

[0013] In some embodiments of this application, the second mounting cavity includes a first chamber, a second chamber, and a third chamber that are sequentially connected from the outside to the inside of the second opening, wherein the inner diameter of the first chamber is larger than the inner diameter of the second chamber, the inner diameter of the second chamber is larger than the inner diameter of the third chamber, and a first step is formed at the junction of the second chamber and the third chamber;

[0014] The limiting component includes:

[0015] A stop portion is located in the first chamber and is connected to the side plate. The stop portion has a first through hole at its center.

[0016] The propulsion unit includes: a main body located in the second chamber; and an extension connected to the main body and extending from the second chamber into the third chamber.

[0017] The second elastic element is sleeved on the extension and is constrained between the main body and the first step;

[0018] A limiting part is rotatably connected in the third chamber, and the limiting assembly is connected to the movable type assembly through the limiting part;

[0019] A third elastic element is located on the second side of the limiting portion and is connected to the limiting portion;

[0020] The pushing action of the extension can cause the limiting part to rotate, thereby releasing the connection between the limiting part and the movable type assembly, and compressing the third elastic element.

[0021] In some embodiments of this application, the limiting portion includes:

[0022] A limiting rod is provided with a rotating hole, and the limiting rod is connected to the third chamber being delivered through a rotating shaft passing through the rotating hole;

[0023] The first protrusion is provided on the second side of the limiting rod and is located above the rotating hole;

[0024] The contact position between the limiting rod and the extension is on the first side of the limiting rod and below the rotating hole; the connection between the limiting rod and the third elastic member is on the second side of the limiting rod and below the rotating hole; when the limiting part is connected with the movable type assembly, the first protrusion enters the limiting groove.

[0025] In some embodiments of this application, the movable type component includes:

[0026] A movable type block limiting part is installed in the first mounting cavity, and the movable type block limiting part is provided with a limiting groove on the side facing the second mounting cavity; the limiting groove is connected to the limiting part to restrict the movable type block limiting part from extending out of the first opening;

[0027] In some embodiments of this application, movable type blocks are installed in the movable type block limiting portion.

[0028] The first protrusion has a first inclined surface on its second side, and the first inclined surface gradually moves away from the limiting rod from top to bottom;

[0029] The limiting groove has a second inclined surface, and when the first protrusion enters the limiting groove, the second inclined surface contacts and engages with the first inclined surface.

[0030] In some embodiments of this application, the limiting component has:

[0031] In the first state, the pushing part is in contact with the stopping part, one end of the second elastic member is in contact with the main body, the other end of the second elastic member is in contact with the first step, the top of the limiting part is inserted into the limiting groove, and the bottom of the limiting part is in contact with the end of the extension member;

[0032] In the second state, the propulsion part is pushed close to the first step and compresses the second elastic member, the extension member pushes the bottom of the limiting part and compresses the third elastic member, the top of the limiting part disengages from the limiting groove, and the limiting part no longer restricts the movable type assembly from extending out of the first opening.

[0033] In some embodiments of this application, when the limiting component is in the first state, the second elastic member is in the natural state or the compressed state.

[0034] In some embodiments of this application, when the limiting component is in the first state, the third elastic member is in the natural state or the compressed state.

[0035] In some embodiments of this application, a third mounting cavity is provided in the movable type block limiting part, the third mounting cavity having a third opening and a fourth opening, the third opening being located at the top of the movable type block limiting part, and the fourth opening being located at the bottom of the movable type block limiting part;

[0036] The third mounting cavity includes a fourth chamber and a fifth chamber that are connected sequentially from top to bottom. The inner diameter of the fifth chamber is larger than the inner diameter of the fourth chamber, and a third step is formed at the junction of the fourth chamber and the fifth chamber.

[0037] The movable type block is confined by the third step and cannot be dislodged from the third opening.

[0038] Compared with the prior art, the beneficial effects of this application are as follows:

[0039] The tire mold with replaceable type blocks provided in this application has a type block assembly installed in a first mounting cavity and a limiting component disposed in a second mounting cavity. The opening direction of the first mounting cavity is located at the top of the side plate, and the opening direction of the second mounting cavity is located at the first side of the side plate. Therefore, the disassembly of the type block assembly does not require operation at the bottom of the side plate; it only requires switching the engagement relationship between the limiting component in the second mounting cavity and the type block assembly. Thus, the side plate does not need to be disassembled, greatly shortening the process of replacing the type block assembly. At the same time, the installation method of the type block assembly and the side plate does not require additional fasteners. The limiting component, on the one hand, positions the type block assembly on the side plate, and on the other hand, prevents the type block assembly from detaching from the side plate, making the installation of the type block assembly more convenient. For tire molds with replaceable type blocks equipped with a first elastic element, when the limiting component is released from its engagement with the type block assembly, the elastic potential energy stored in the first elastic element is released, pushing the type block assembly out of the first opening. The type block assembly can be removed without the aid of other auxiliary tools. Attached Figure Description

[0040] Figure 1 This is a cross-sectional structural schematic diagram of the side plate of a tire mold with replaceable movable blocks according to one embodiment of this application;

[0041] Figure 2 This is a cross-sectional structural schematic diagram of a tire mold with replaceable movable blocks according to one embodiment of this application, wherein the limiting component is in a first state;

[0042] Figure 3 yes Figure 1 A magnified view of part A in the middle;

[0043] Figure 4This is a cross-sectional structural schematic diagram of the propulsion section of a tire mold with replaceable movable blocks according to one embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the movable block limiting part of a tire mold with replaceable movable blocks according to one embodiment of this application;

[0045] Figure 6 This is a structural schematic diagram of the movable block limiting part of the tire mold with replaceable movable blocks according to one embodiment of this application from another angle.

[0046] Figure 7 This is a cross-sectional structural schematic diagram of the movable block limiting part of a tire mold with replaceable movable blocks according to one embodiment of this application.

[0047] Figure 8 This is a front view of the limiting part of a tire mold with replaceable movable blocks according to one embodiment of this application;

[0048] Figure 9 yes Figure 2 A magnified view of part B in the middle section;

[0049] Figure 10 This application provides a cross-sectional structural schematic diagram of a tire mold with replaceable movable blocks according to one embodiment, wherein the limiting component is in a second state.

[0050] Figure 11 This is a three-dimensional structural diagram of the limiting part of a tire mold with replaceable movable blocks according to one embodiment of this application;

[0051] Figure 12 This is a cross-sectional structural schematic diagram of a tire mold with replaceable movable blocks according to one embodiment of this application, wherein the movable block assembly is just in contact with the limiting part.

[0052] Figure 13 This is a cross-sectional structural schematic diagram of a tire mold with replaceable movable type blocks according to one embodiment of this application, wherein the movable type block assembly pushes the limiting part to rotate.

[0053] Number in the picture:

[0054] Side plate 100; First mounting cavity 110; First opening 111; Second mounting cavity 120; Second opening 121; First chamber 1201; Second chamber 1202; Third chamber 1203; First step 122; Second step 123; Movable type assembly 200; Movable type limiting part 210; Third mounting cavity 2100; Fourth chamber 2101; Fifth chamber 2102; Limiting groove 211; Second inclined surface 2111; Third opening 212; Fourth opening 213; Third step 214; Movable type 220; Limiting assembly 300; Stop part 310; First through hole 311; Push part 320; Main body 321; Extension part 322; Second elastic element 330; Limiting part 340; Limiting rod 341; Rotating hole 3411; First protrusion 342; First inclined surface 3421; Third elastic element 350; Detailed Implementation

[0055] The technical solutions of this application are described in detail below with reference to specific embodiments. However, it should be understood that, without further description, the elements, structures and features in one embodiment can also be beneficially incorporated into other embodiments.

[0056] It is to be understood that although the accompanying drawings may show a specific order of method steps, the order of the steps may differ from the depicted order. Furthermore, two or more steps may be performed simultaneously or partially simultaneously. Such variations will depend on the software and hardware chosen, as well as the designer's selection. All such variations are within the scope of this disclosure.

[0057] It is worth understanding that the terms "system" and "unit" used in this article are methods of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, these terms can be replaced by other expressions that achieve the same purpose.

[0058] The described embodiments are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application shall fall within the protection scope defined by the claims of this application.

[0059] like Figure 1 and Figure 2 As shown, in one embodiment of the replaceable type block tire mold of this application, the tire mold includes:

[0060] Side panel 100 has opposing top and bottom portions, the top portion being close to the tire and the bottom portion being away from the tire; side panel 100 also has opposing first and second sides; side panel 100 has the following openings:

[0061] A first mounting cavity 110 has a first opening 111 located at the top of the side plate 100; a second mounting cavity 120 has a second opening 121 located on the first side of the side plate 100; the second mounting cavity 120 communicates with the first mounting cavity 110 on the second side.

[0062] The movable type block assembly 200 is installed in the first mounting cavity 110;

[0063] The limiting component 300 is installed in the second mounting cavity 120;

[0064] When the limiting component 300 cooperates with the movable type component 200, the limiting component 300 restricts the movable type component 200 from disengaging from the first opening 111 into the first mounting cavity 110; when the limiting component 300 releases its cooperation with the movable type component 200, the limiting component 300 releases its restriction on the movable type component 200, allowing the movable type component 200 to extend out from the first opening 111.

[0065] The tire mold with replaceable type blocks provided in this application has a type block assembly 200 installed in a first mounting cavity 110 and a limiting assembly 300 disposed in a second mounting cavity 120. The opening direction of the first mounting cavity 110 is located at the top of the side plate 100, and the opening direction of the second mounting cavity 120 is located on the first side of the side plate 100. Therefore, the disassembly of the type block assembly 200 does not require operation at the bottom of the side plate 100. It only requires switching the engagement relationship between the limiting assembly 300 in the second mounting cavity 120 and the type block assembly 200, thus eliminating the need to disassemble the side plate 100 and greatly shortening the replacement process of the type block assembly 200. At the same time, the installation method of the type block assembly 200 and the side plate 100 does not require additional fasteners. The limiting assembly 300, on the one hand, positions the type block assembly 200 on the side plate 100, and on the other hand, prevents the type block assembly 200 from detaching from the side plate 100, making the installation of the type block assembly 200 more convenient.

[0066] refer to Figure 1 The inner diameter of the first mounting cavity 110 gradually increases from bottom to top, forming a gradually expanding chamber, which facilitates the installation and removal of the movable type block assembly 200 in the first mounting cavity 110.

[0067] refer to Figure 2 The tire mold provided in this application embodiment further includes: a first elastic member 400, which is located in the first mounting cavity 110 and at the bottom of the movable block assembly 200;

[0068] When the limiting component 300 engages with the movable type assembly 200, the first elastic element 400 is compressed at the bottom of the movable type assembly 200; when the limiting component 300 disengages from the movable type assembly 200, the limiting component 300 releases its restriction on the movable type assembly 200, allowing the movable type assembly 200 to extend out from the first opening 111 under the elastic restoring force of the first elastic element 400.

[0069] When the limiting component 300 is released from its connection with the movable type component 200, the elastic potential energy stored in the first elastic element 400 is released, pushing the movable type component 200 out of the first opening 111. The movable type component 200 can be removed without the need for other auxiliary tools.

[0070] refer to Figure 1 and Figure 3 The second mounting cavity 120 includes a first chamber 1201, a second chamber 1202 and a third chamber 1203 that are connected sequentially from the outside to the inside from the second opening 121. The inner diameter of the first chamber 1201 is larger than the inner diameter of the second chamber 1202, the inner diameter of the second chamber 1202 is larger than the inner diameter of the third chamber 1203, and a first step 122 is formed at the junction of the second chamber 1202 and the third chamber 1203.

[0071] refer to Figure 2 and Figure 4 The limiting component 300 includes:

[0072] The stop part 310 is located in the first chamber 1201 and is connected to the side plate. The stop part 310 has a first through hole 311 at its center.

[0073] The propulsion unit 320 includes: a main body 321 located in the second chamber 1202; and an extension 322 connected to the main body 321 and extending from the second chamber 1202 into the third chamber 1203.

[0074] The second elastic member 330 is sleeved on the extension member 322 and is restricted between the main body 321 and the first step 122;

[0075] The limiting part 340 is rotatably connected in the third chamber 1203, and the limiting assembly 300 is connected to the movable type assembly 200 through the limiting part 340;

[0076] The third elastic member 350 is located on the second side of the limiting part 340 and is connected to the limiting part 340.

[0077] The pushing action of the extension 322 can cause the limiting part 340 to rotate, thereby releasing the connection between the limiting part 340 and the movable type assembly 200, and compressing the third elastic member 350.

[0078] refer to Figure 3 A second step 123 is formed at the junction of the first chamber 1201 and the second chamber 1202; the stop part 310 fits against the second step 123. The stop part 310 has external threads on its outer side, and the inner wall of the first chamber 1201 has internal threads, so the stop part 310 is connected to the first chamber 1201 by threads. The second step 123 is provided to prevent the stop part 310 from rotating further inward when it is installed in the first chamber 1201, and the stop part 310 serves as a reminder that it is installed in place. The inner diameter of the first through hole 311 at the center of the stop part 310 is smaller than the outer diameter of the propulsion part body 321, but the first through hole 311 allows passage to push the propulsion part body 321 along the second chamber 1202. When the propulsion part 320 is moved to the second side by an external force, it compresses the second elastic member 330. When the external force is released, the elastic potential energy stored in the second elastic member 330 is released, thereby pushing the propulsion part 320 to move to the first side. At this time, the stop part 310 is located on the first side of the propulsion part 320 to prevent the propulsion part 320 from being pushed out of the second chamber 1202.

[0079] refer to Figure 2 The movable type component 200 includes:

[0080] The movable type block limiting part 210 is installed in the first mounting cavity 110. The movable type block limiting part 210 is provided with a limiting groove 211 on the side facing the second mounting cavity 120. The limiting groove 211 is connected to the limiting part 340 to restrict the movable type block limiting part 210 from extending out of the first opening 111.

[0081] The movable type block 220 is installed in the movable type block limiting part 210.

[0082] The top of the movable type block limiting part 210, the top of the movable type block 220, and the top of the side plate 100 form a surface that mates with the tire.

[0083] As a component that needs to be replaced during tire production, the simpler the structure, the lower the processing cost and the more durable it is. If grooves are cut into the type blocks for positioning, the processing cost will be greatly increased. Therefore, in the tire mold provided in this application, the type blocks are installed in a type block positioning part. This positioning part serves as the installation and positioning structure between the type block and the side plate and does not need to be replaced each time. Therefore, setting a positioning groove on the type block positioning part can accommodate various type blocks.

[0084] refer to Figure 5 and Figure 6 The movable type block limiting part 210 has a third mounting cavity 2100. The third mounting cavity 2100 has a third opening 212 and a fourth opening 213. The third opening 212 is located at the top of the movable type block limiting part 210, and the fourth opening 213 is located at the top of the movable type block limiting part 210.

[0085] The third mounting cavity 2100 includes a fourth chamber 2101 and a fifth chamber 2102 connected from top to bottom. The inner diameter of the fifth chamber 2102 is larger than the inner diameter of the fourth chamber 2101. A third step 214 is formed at the junction of the fourth chamber 2101 and the fifth chamber 2102.

[0086] The movable type block 220 is restricted by the third step 214 and cannot come out of the third opening 212.

[0087] The information surface on the top of the movable type block 220 is transferred from the third opening 212 to the tire. The inner diameter of the fourth chamber 2101 and the fifth chamber 2102 gradually decreases from bottom to top, forming a gradually expanding chamber, which facilitates the installation and removal of the movable type block 220 in the fourth chamber 2101 and the fifth chamber 2102 from the fourth opening 213.

[0088] refer to Figure 8 and Figure 9 The limiting part 340 includes:

[0089] The limiting rod 341 has a rotating hole 3411 and is connected to the third chamber 1203 through a rotating shaft passing through the rotating hole 3411.

[0090] The first protrusion 342 is provided on the second side of the limiting rod 341 and is located above the rotating hole 3411;

[0091] The contact position between the limiting rod 341 and the extension 322 is on the first side of the limiting rod 341 and below the rotating hole 3411; the connection between the limiting rod 341 and the third elastic member 350 is on the second side of the limiting rod 341 and below the rotating hole 3411; when the limiting part 340 is engaged with the movable type assembly 200, the first protrusion 342 enters the limiting groove 211.

[0092] The extension 322 acts on the first portion of the limiting rod 341 located below the rotating hole 3411, causing the second portion of the limiting rod 341 located above the rotating hole 3411 to move in the opposite direction. For example, refer to Figure 10 The extension 322 pushes the first part of the limiting rod 341 to the second side, causing the limiting rod 341 to rotate around the pivot, and then the second part of the limiting rod 341 moves to the first side, and then the first protrusion 342 leaves the limiting groove 211, and the limiting part 340 releases the restriction on the movable type assembly 200.

[0093] refer to Figure 7 and Figure 11The first protrusion 342 has a first inclined surface 3421 on its second side, and the first inclined surface 3421 gradually moves away from the limiting rod 341 from top to bottom; the limiting groove 211 has a second inclined surface 2111, and when the first protrusion 342 enters the limiting groove 211, the second inclined surface 2111 contacts and engages with the first inclined surface 3421.

[0094] refer to Figure 2 , Figure 9 and Figure 10 The limiting component 300 has:

[0095] In the first state, the main body 321 of the propulsion part is in contact with the stop part 310, one end of the second elastic member 330 is in contact with the main body 321, the other end of the second elastic member 330 is in contact with the first step 122, the first protrusion 342 is inserted into the limiting groove 211, and the bottom of the limiting part 340 is in contact with the end of the extension member 322.

[0096] In the second state, the main body 321 of the propulsion unit is pushed close to the first step 122, thereby compressing the second elastic member 330. The extension member 322 pushes the bottom of the limiting part 340 and compresses the third elastic member 350. The first protrusion 342 disengages from the limiting groove 211, and the limiting part 340 no longer restricts the movable type assembly 200 from extending out of the first opening 111.

[0097] Pushing the propulsion part 320 to the second side allows the limiting assembly 300 to switch from the first state to the second state. In the first state, the bottom of the limiting part 340 is in contact with the end of the extension 322. Therefore, the movement of the propulsion part 320 and the rotation of the limiting part 340 occur simultaneously. Compared to the case where the bottom of the limiting part 340 is not in contact with the end of the extension 322, the propulsion part 320 does not have any invalid movement stroke, shortening the process of switching from the first state to the second state. An external force-applying tool, such as a push rod tool, applies force to the propulsion part 320 through the first through hole 311, thereby pushing the propulsion part 320 to drive the limiting part 340 to rotate until the first protrusion 342 disengages from the limiting groove 211.

[0098] refer to Figure 12 and Figure 13 During the installation of the movable type assembly, the limiting component 300 is not subjected to any external force and is in the first state. A downward external force is applied to the movable type assembly 200 to overcome the first elastic member 400, causing the movable type limiting part 210 to move downwards along the first inclined surface 3421 of the first protrusion 342. The limiting rod 341 is pushed by the movable type limiting part 210, and its portion above the rotating hole 3411 rotates to the first side, while the portion below the rotating hole 3411 rotates to the second side, thereby compressing the third elastic member 350. The third elastic member 350 stores elastic potential energy. (Reference) Figure 10When the movable type block limiting part 210 moves downward to a certain position, the first protrusion 342 is opposite to the limiting groove 211. At this time, the elastic potential energy of the third elastic element 350 is released, pushing the part of the limiting rod 341 located below the rotating hole 3411 to rotate to the first side, thereby causing the part of the limiting rod 341 located above the rotating hole 3411 to rotate to the second side. The first protrusion 342 enters the limiting groove 211, and the limiting part 340 achieves a cooperative connection with the movable type block limiting part 210.

[0099] refer to Figure 2 When the limiting component 300 is in the first state, the second elastic member 330 is in the natural state or the compressed state. Therefore, the main body 321 of the propulsion part and the stop part 310 are at least in contact without force, or they abut against each other under the elastic restoring force of the second elastic member 330. This ensures that the main body 321 of the propulsion part is held in place by the second elastic member 330 and keeps in contact with the stop part 310 when no external force is applied. This ensures that the movable block assembly 200 is stably installed in the side plate 100 when the tire mold is in use, and that the propulsion part 320 will not move unexpectedly and release the limiting part 340 from limiting the movable block assembly 200.

[0100] refer to Figure 2 When the limiting component 300 is in the first state, the third elastic member 350 is in the natural state or the compressed state. Therefore, the first part of the limiting part 340 and the end of the extension member 322 are at least in contact without force, or they abut against each other under the elastic restoring force of the third elastic member 350. This means that when no external force is applied, the first part of the limiting part 340 is held in place by the third elastic member 350. When the extension member 322 is not in contact with the limiting part 340, the first protrusion 342 remains in the limiting groove 211 and will not come out.

Claims

1. A tire mold with replaceable type blocks, characterized in that, include: A side panel having an opposing top and bottom, the top being close to the tire and the bottom being away from the tire; the side panel also having opposing first and second sides; the side panel having an opening therein: A first mounting cavity having a first opening located at the top of the side plate; a second mounting cavity having a second opening located on a first side of the side plate; The second mounting cavity communicates with the first mounting cavity on the second side; The movable type assembly is installed in the first mounting cavity; A limiting component is installed in the second mounting cavity; When the limiting component engages with the movable type component, the limiting component restricts the movable type component from disengaging from the first opening into the first mounting cavity; when the limiting component disengages from the movable type component, the limiting component releases the restriction on the movable type component, allowing the movable type component to extend out from the first opening. Furthermore, the second mounting cavity includes a first chamber, a second chamber, and a third chamber that are sequentially connected from the outside to the inside of the second opening, wherein the inner diameter of the second chamber is larger than the inner diameter of the third chamber, and a first step is formed at the junction of the second chamber and the third chamber; The limiting component includes: A stop portion is located in the first chamber and connected to the side plate; the stop portion is provided with a first through hole. The propulsion unit includes: a main body located in the second chamber; and an extension connected to the main body and extending from the second chamber into the third chamber. The second elastic element is sleeved on the extension and is constrained between the main body and the first step; A limiting part is rotatably connected in the third chamber, and the limiting assembly is connected to the movable type assembly through the limiting part; A third elastic element is located on the second side of the limiting portion and is connected to the limiting portion; The pushing action of the extension can cause the limiting part to rotate, thereby releasing the connection between the limiting part and the movable type assembly, and compressing the third elastic element.

2. The tire mold with replaceable movable blocks according to claim 1, characterized in that, Also includes: A first elastic element is located in the first mounting cavity and at the bottom of the movable type assembly; When the limiting component engages with the movable type assembly, the first elastic element is compressed at the bottom of the movable type assembly; when the limiting component disengages from the movable type assembly, it releases its restriction on the movable type assembly, allowing the movable type assembly to extend out from the first opening under the elastic restoring force of the first elastic element.

3. The tire mold with replaceable movable blocks according to claim 1, characterized in that: The inner diameter of the first cavity is larger than the inner diameter of the second cavity; the stop portion has a first through hole at its center.

4. The tire mold with replaceable movable blocks according to any one of claims 1-3, characterized in that, The movable type block assembly includes: A movable type block limiting part is installed in the first mounting cavity, and the movable type block limiting part is provided with a limiting groove on the side facing the second mounting cavity; the limiting groove is connected to the limiting part to restrict the movable type block limiting part from extending out of the first opening; The movable type blocks are installed in the movable type block limiting part.

5. The tire mold with replaceable movable blocks according to claim 4, characterized in that, The limiting part includes: A limiting rod is provided with a rotating hole, and the limiting rod is connected to the third chamber being delivered through a rotating shaft passing through the rotating hole; The first protrusion is provided on the second side of the limiting rod and is located above the rotating hole; The contact position between the limiting rod and the extension is on the first side of the limiting rod and below the rotating hole; the connection between the limiting rod and the third elastic member is on the second side of the limiting rod and below the rotating hole; when the limiting part is connected to the movable type assembly, the first protrusion enters the limiting groove.

6. The tire mold with replaceable movable blocks according to claim 5, characterized in that, The first protrusion has a first inclined surface on its second side, and the first inclined surface gradually moves away from the limiting rod from top to bottom; The limiting groove has a second inclined surface, and when the first protrusion enters the limiting groove, the second inclined surface contacts and engages with the first inclined surface.

7. The tire mold with replaceable movable blocks according to claim 5, characterized in that, The limiting component has: In the first state, the pushing part is in contact with the stopping part, one end of the second elastic member is in contact with the main body, the other end of the second elastic member is in contact with the first step, the first protrusion is inserted into the limiting groove, and the bottom of the limiting rod is in contact with the end of the extension member; In the second state, the propulsion part is pushed close to the first step and compresses the second elastic member, the extension pushes the bottom of the limiting rod and compresses the third elastic member, the first protrusion disengages from the limiting groove, and the limiting part no longer restricts the movable type assembly from extending from the first opening.

8. The tire mold with replaceable movable blocks according to claim 7, characterized in that, When the limiting component is in the first state, the second elastic element is in the natural state or the compressed state.

9. The tire mold with replaceable movable blocks according to claim 8, characterized in that, When the limiting component is in the first state, the third elastic element is in the natural state or the compressed state.

10. The tire mold with replaceable movable blocks according to claim 5, characterized in that, The movable type block limiting part is provided with a third mounting cavity, the third mounting cavity having a third opening and a fourth opening, the third opening being located at the top of the movable type block limiting part, and the fourth opening being located at the bottom of the movable type block limiting part; The third mounting cavity includes a fourth chamber and a fifth chamber that are connected sequentially from top to bottom. The inner diameter of the fifth chamber is larger than the inner diameter of the fourth chamber, and a third step is formed at the junction of the fourth chamber and the fifth chamber. The movable type block is confined by the third step and cannot be dislodged from the third opening.

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