Mold structure and system free of side core pulling

Abstract

The utility model relates to the technical field of butterfly valve sealing ring molds, in particular to a side core-pulling-free mold structure and system, which comprises an upper mold, a middle mold plate, a lower mold and a mold core, a product upper parting surface is arranged between the upper mold and the middle mold plate, a product lower parting surface is arranged between the lower mold and the middle mold plate, the middle mold plate comprises a plurality of splicing blocks and a side mold core, and the splicing blocks are connected with the side mold core. The plurality of splicing blocks are spliced and connected, the upper mold, the splicing blocks, the lower mold and the mold core form a product mold cavity, the side mold core is arranged on the splicing blocks, and the axis of the side mold core is arranged in the radial direction of the product mold cavity. The upper parting surface of the product is positioned between the upper mold and the middle mold plate, the lower parting surface of the product is positioned between the lower mold and the middle mold plate, meanwhile, the middle mold plate is formed by splicing a plurality of splicing blocks, and the side mold cores are arranged on the splicing blocks, so that all matching positions and parting surfaces on the product and the mold are exposed on the workbench during mold opening in production; and flashes are brought out while the product is taken down, so that the service life of the die is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of butterfly valve sealing ring molds, and more specifically, to a mold structure and system that eliminates the need for side core pulling. Background Technology

[0002] Butterfly valve sealing rings are typically designed as annular to meet the sealing requirements between the valve stem and the valve body. The mold structure used in manufacturing annular butterfly valve sealing rings is usually a side-pulling mold structure. Traditional side-pulling is achieved using inclined guide posts and sliding elements. During production, the rubber material, under pressure and in a viscous state, has good fluidity. While filling the mold cavity, it also seeps into the moving gaps of the sliding elements, where it undergoes high-temperature vulcanization along with the mold, forming a thin layer of flash. This flash has a high coefficient of friction, and when it accumulates to a certain extent, it severely hinders the normal sliding of the sliding elements. In severe cases, it can even jam the forklift, causing the inclined guide post to break, forcing a shutdown to disassemble the mold for cleaning and repair. This significantly impacts the mold's lifespan and product production efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies where flash remains on the mold, and to provide a mold structure and system that eliminates the need for side core pulling, which removes the flash along with the product, thus extending the service life of the mold.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A mold structure for eliminating side core pulling is provided, comprising an upper mold, a middle mold plate, a lower mold, and a core. During mold closing, the upper mold, the middle mold plate, and the lower mold are sequentially connected. The two ends of the core are respectively connected to the upper mold and the lower mold, and the core penetrates through the middle mold plate. An upper parting surface for the product is provided between the upper mold and the middle mold plate, and a lower parting surface for the product is provided between the lower mold and the middle mold plate. The middle mold plate includes multiple blocks and side cores. The multiple blocks are assembled and connected. The upper mold, the blocks, the lower mold, and the core form a product cavity. The side cores are disposed on the blocks, and the axis of the side cores is arranged radially along the product cavity.

[0006] This utility model's mold structure, which eliminates the need for side core pulling, involves multiple blocks assembling to form a middle mold plate during mold closing. This middle mold plate, along with the upper mold, lower mold, and core, forms the product cavity for the vulcanization molding of the butterfly valve sealing ring. After vulcanization, the middle mold plate, along with the product and lower mold, moves downwards. The product's upper parting surface separates from the upper mold. The middle mold plate is then pushed towards the operating table by the machine's push rod. The product and flash move upwards with the blocks until the product's lower parting surface separates from the lower mold. The operator can then use an air gun to open the blocks. As the blocks open, the side core is pulled out of the product, allowing for removal of the product and the removal of any remaining flash. After removing the product, the blocks are reassembled into a middle mold plate, moved onto the lower mold, and the machine is started to produce the next batch of products. By positioning the upper parting surface of the product between the upper mold and the middle mold plate, and the lower parting surface between the lower mold and the middle mold plate, while setting the middle mold plate as a combination of multiple blocks and placing the side core on the blocks, all mating parts of the product and the mold, as well as the parting surface, are exposed on the worktable during production and mold opening. When the product is removed, the flash is also taken out, extending the service life of the mold.

[0007] Furthermore, the longitudinal parting surface between the multiple modules bisects the product cavity, facilitating the separation of the modules from the product.

[0008] Furthermore, the assembly block is equipped with a lever, which is located outside the lower mold. The operator opens the assembly block by blowing air onto the lever with an air gun, making it easy for the operator to open the assembly block.

[0009] Furthermore, the mold core includes an upper mold core and a lower mold core. The upper mold core is connected to the upper mold, and the lower mold core is connected to the lower mold. A parting surface is provided between the upper mold core and the lower mold core. The heights of the upper mold core and the lower mold core are equal. During mold closing, the upper mold core and the lower mold core abut against each other. By setting the upper mold core and the lower mold core to be inserted into the product, the interior of the product is formed. Setting the heights of the upper mold core and the lower mold core to be the same facilitates the separation of the upper mold core and the lower mold core from the product.

[0010] Furthermore, both the upper mold core and the lower mold core have a central tear-off groove at their parting surfaces, and this central tear-off groove communicates with the product cavity. By providing the central tear-off groove, the upper and lower mold cores can be easily separated from the product.

[0011] Furthermore, both the upper parting surface of the upper mold and the lower parting surface of the lower mold are provided with parting surface tearing grooves, which are connected to the product cavity. By providing parting surface tearing grooves, it is easy to separate the product and flash from the upper and lower molds.

[0012] Furthermore, the mating surface between the assembly block and the lower mold is designed as a pillow-shaped inclined surface, which gradually slopes towards the product cavity from the assembly block to the lower mold. By setting the pillow-shaped inclined surface, when the assembly block moves towards the lower mold and mates with it, the assembly blocks are pressed against each other, thus facilitating the assembly of the assembly blocks.

[0013] Furthermore, the upper mold is provided with a first positioning element, and the lower mold is provided with a second positioning element; during mold closing, the first positioning element and the second positioning element are connected. By setting the first positioning element and the second positioning element, and connecting them during mold closing, the relative positions of the upper mold and the lower mold are positioned, facilitating the formation of the product cavity during mold closing.

[0014] This utility model also provides a side-pulling core-free system, including a machine base, a machine base booster block, and the aforementioned side-pulling core-free mold structure. The upper mold, the lower mold, and the machine base booster block are all connected to the machine base, and the machine base booster block is slidably connected to the assembly block.

[0015] This utility model's side-pulling core-removing system connects the upper and lower molds to corresponding heating plates on the machine tool, and connects the machine tool's push block to the assembly block. During mold opening, the machine tool's push block lifts the assembly block away from the lower mold. Simultaneously, the machine tool's push block and the assembly block are slidably connected, guiding the movement of the assembly block and ensuring that it remains on the same horizontal plane after disassembly, facilitating subsequent mold assembly.

[0016] Furthermore, a connector is slidably connected to the machine tool booster block, and the machine tool booster block is provided with a sliding groove. The connector is located within the sliding groove and is connected to the assembly block. By providing the sliding groove, when the assembly block is opened, the connector slides within the sliding groove, guiding the movement of the assembly block and facilitating subsequent assembly of the assembly block.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model discloses a mold structure and system for eliminating side core pulling. By positioning the upper parting surface of the product between the upper mold and the middle mold plate, and the lower parting surface of the product between the lower mold and the middle mold plate, and setting the middle mold plate as a combination of multiple blocks, with the side cores placed on the blocks, all mating parts of the product and the mold, as well as the parting surface, are exposed on the worktable during production and mold opening. When the product is removed, the flash is also taken out, extending the service life of the mold.

[0019] 2. The present invention provides a mold structure and system for eliminating side core pulling, which facilitates the separation of the product and flash from the mold by setting a toggle part, a parting surface process tearing groove and a middle process tearing groove.

[0020] 3. The present invention provides a mold structure and system for eliminating the need for side core pulling. By setting a pillow-position inclined surface, a first positioning component, a second positioning component, and a machine base pusher block, it is convenient to close the mold after the product is removed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mold structure without side core pulling, taken from the first-person perspective when the mold is closed.

[0022] Figure 2 This is a schematic diagram of the mold structure without side core pulling, taken from a second-view perspective when the mold is closed.

[0023] Figure 3 This is a schematic diagram of the mold structure without side core pulling, taken from the first-person perspective during mold opening.

[0024] Figure 4 This is a schematic diagram of the mold structure without side core pulling, taken from a second-view perspective during mold opening.

[0025] Figure 5 This is a schematic diagram of a system that eliminates the need for side-pulling.

[0026] In the attached diagram: 100, upper mold; 110, parting line tearing groove; 120, first positioning component; 200, middle mold plate; 210, assembly block; 211, actuating part; 212, pillow-position inclined surface; 220, side core; 300, lower mold; 310, second positioning component; 400, core; 410, upper mold core; 420, lower mold core; 430, middle part tearing groove; 500, machine base pusher block; 510, connecting component; 520, sliding groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The present utility model will be further described below with reference to specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams, not actual pictures, and should not be construed as limiting the present patent. In order to better illustrate the embodiments of the present utility model, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, if the embodiments of this utility model involve descriptions such as "first" and "second," these descriptions are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of those features. In addition, the meaning of "and / or" in the text is that it includes three parallel options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0029] Example 1

[0030] This embodiment is a first embodiment of a mold structure that eliminates the need for side core pulling, such as... Figure 1 As shown, the mold includes an upper mold 100, a middle mold 200, a lower mold 300, and a core 400. During mold closing, the upper mold 100, middle mold 200, and lower mold 300 are sequentially connected. The two ends of the core 400 are connected to the upper mold 100 and the lower mold 300 respectively. The core 400 penetrates the middle mold 200. An upper parting surface for the product is provided between the upper mold 100 and the middle mold 200, and a lower parting surface for the product is provided between the lower mold 300 and the middle mold 200. Figure 4 As shown, the middle mold 200 includes multiple modules 210 and side cores 220. The multiple modules 210 are connected together. The upper mold 100, modules 220, lower mold 300 and cores 400 form a product cavity. The side cores 220 are provided on the modules 210. Specifically, the side cores 220 are fixed and embedded on the modules 210 by pins. The axis of the side cores 220 is arranged radially along the product cavity, that is, when the modules 210 are opened, the side cores 220 can be pulled out from the product.

[0031] like Figure 3As shown, the core 400 includes an upper mold core 410 and a lower mold core 420. The upper mold core 410 is connected to the upper mold 100, and the lower mold core 420 is connected to the lower mold 300. A parting surface is provided between the upper mold core 410 and the lower mold core 420. The heights of the upper mold core 410 and the lower mold core 420 are equal. During mold closing, the upper mold core 410 and the lower mold core 420 abut against each other. By setting the upper mold core 410 and the lower mold core 420 to insert into the product, the interior of the product is formed. Setting the heights of the upper mold core 410 and the lower mold core 420 to be the same facilitates the separation of the upper mold core 410 and the lower mold core 420 from the product.

[0032] The working principle of the mold structure that eliminates the need for side core pulling in this embodiment is as follows:

[0033] like Figure 1 As shown, during mold closing, multiple blocks 210 assemble to form the middle mold plate 200, which cooperates with the upper mold 100, lower mold 300, and core 400 to form the product cavity. When the mold temperature reaches the required vulcanization temperature, rubber injection begins. The viscous, flowing rubber is injected into the mold cavity through a nozzle. After filling, the mold is kept warm and pressurized for a period of time, and the rubber vulcanizes and solidifies. The material transforms from its original viscous, flowing state into a solid product with usable properties, thus performing the vulcanization molding of the butterfly valve sealing ring. For example... Figure 3 As shown, after vulcanization molding, the middle mold 200 and the product, along with the lower mold 300, move downwards together. The upper parting surface of the product separates from the upper mold 100. Then, the middle mold 200 is pushed towards the operating table by the machine push rod. The product and flash move upwards together with the assembly block 210 until the lower parting surface of the product separates from the lower mold 300. Figure 4 As shown, the operator can open the assembly block 210 with the assistance of an air gun. When the assembly block 210 is opened, the side core 220 is pulled out from the product, allowing the product to be removed and any remaining flash removed. After removing the product, the assembly blocks 210 are assembled into the middle template 200, moved onto the lower mold 300, and the machine is started to produce the next batch of products. By positioning the upper parting surface of the product between the upper mold 100 and the middle template 200, and the lower parting surface between the lower mold 300 and the middle template 200, and by setting the middle template 200 to be composed of multiple assembly blocks 210, with the side core 220 placed on the assembly blocks 210, all mating parts and parting surfaces of the product and mold are exposed on the worktable during mold opening. This allows the flash to be removed along with the product, extending the mold's lifespan.

[0034] Example 2

[0035] This embodiment is a second embodiment of a mold structure that eliminates the need for side core pulling. This embodiment is similar to the first embodiment, except that, as Figure 4As shown, the longitudinal parting surface between multiple modules 210 bisects the product cavity. The opening direction of the modules 210 is perpendicular to the axis of the product. The surface where two adjacent modules 210 abut is the longitudinal parting surface, which passes through the center of the product. This facilitates the separation of the modules 210 from the product.

[0036] like Figure 2 As shown, the assembly block 210 is provided with a toggle part 211, which is located outside the lower mold 300. Specifically, the toggle part 211 is a protrusion extending beyond the lower mold 300, connected to the assembly block 210. A toggle groove is provided between the protrusions of two adjacent assembly blocks 210. The specific shape and size of the toggle groove are not limited, as long as it facilitates the separation of the assembly blocks 210. In this embodiment, the toggle groove is designed as a through hole. The operator opens the assembly block 210 by blowing air into the toggle part 211 (i.e., into the toggle groove) with an air gun. At this time, the cavity gas overflows through the longitudinal parting surface, allowing the operator to easily open the assembly block 210.

[0037] like Figure 1 As shown, both the middle parting surface of the upper mold core 410 and the middle parting surface of the lower mold core 420 are provided with a central process tearing groove 430, which communicates with the product cavity. By providing the central process tearing groove 430, it is easy to separate the upper mold core 410 and the lower mold core 420 from the product.

[0038] like Figure 1 As shown, both the upper parting surface of the upper mold 100 and the lower parting surface of the lower mold 300 are provided with parting surface tearing grooves 110, which are connected to the product cavity. By providing parting surface tearing grooves 110, it is easy to separate the product and flash from the upper mold 100 and the lower mold 300.

[0039] Example 3

[0040] This embodiment is the third embodiment of a mold structure that eliminates the need for side core pulling. This embodiment is similar to Embodiment 1, except that, as Figure 3 and Figure 4 As shown, the mating surface between the assembly block 210 and the lower mold 300 is set as a pillow-shaped inclined surface 212, which gradually slopes towards the product cavity from the assembly block 210 to the lower mold 300. By setting the pillow-shaped inclined surface 212, in this embodiment, the assembly block 210 transitions to the lower mold 300 through the pillow-shaped inclined surface 212. When the assembly block 210 moves towards the lower mold 300 and mates with the lower mold 300, the assembly blocks 210 are pressed against each other, achieving a fast and accurate positioning function, thereby facilitating the assembly of the assembly block 210.

[0041] like Figure 4As shown, the upper mold 100 is provided with a first positioning element 120, and the lower mold 300 is provided with a second positioning element 310; when the molds are closed, the first positioning element 120 and the second positioning element 310 are connected. In this embodiment, the first positioning element 120 is set as a positioning guide post, and the second positioning element 310 is set as a positioning guide sleeve. When the molds are closed, the positioning guide post is inserted into the positioning guide sleeve. By setting the first positioning element 120 and the second positioning element 310, the first positioning element 120 and the second positioning element 310 are connected when the molds are closed, and the relative positions of the upper mold 100 and the lower mold 300 are positioned, which facilitates the formation of the product cavity when the molds are closed.

[0042] Example 4

[0043] This embodiment is a first embodiment of a side-pulling-free core-pulling system, such as... Figure 5 As shown, the structure includes a machine base, a machine base pusher block 500, and a mold structure for side-pulling without core pulling provided in any of the embodiments one to three. The upper mold 100, lower mold 300, and machine base pusher block 500 are all connected to the machine base. The machine base pusher block 500 is slidably connected to the assembly block 210. The upper mold 100 and lower mold 300 are respectively connected to the corresponding heating plates of the machine base, and the machine base pusher block 500 is connected to the assembly block 210. During mold opening, the machine base pusher block 500 lifts the assembly block 210 away from the lower mold 300. Simultaneously, the machine base pusher block 500 is slidably connected to the assembly block 210 to guide the movement of the assembly block 210, ensuring that the assembly block 210 remains on the same horizontal plane after disassembly, facilitating subsequent mold assembly.

[0044] A connector 510 is slidably connected to the machine tool push block 500. In this embodiment, the connector 510 is set as a block pin. The machine tool push block 500 is provided with a sliding groove 520, and the connector 510 is located in the sliding groove 520. The connector 510 is connected to the block 210, that is, the block pin is inserted into the block 210. Each block 210 has one block pin inserted. By setting the sliding groove 520, when the block 210 is opened, the connector 510 slides in the sliding groove 520. The sliding groove 520 guides the movement of the block 210, which is convenient for the subsequent assembly of the block 210.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mold structure for side-pulling molds, comprising an upper mold (100), a middle mold plate (200), a lower mold (300), and a core (400), wherein during mold closing, the upper mold (100), the middle mold plate (200), and the lower mold (300) are sequentially connected, the two ends of the core (400) are respectively connected to the upper mold (100) and the lower mold (300), and the core (400) penetrates the middle mold plate (200), characterized in that, The upper mold (100) and the middle mold plate (200) are provided with an upper parting surface for the product, and the lower mold (300) and the middle mold plate (200) are provided with a lower parting surface for the product. The middle mold plate (200) includes multiple blocks (210) and a side core (220). The multiple blocks (210) are connected together. The upper mold (100), the blocks (220), the lower mold (300) and the core (400) form a product cavity. The side core (220) is provided on the blocks (210), and the axis of the side core (220) is arranged radially along the product cavity.

2. The mold structure for side-pulling without core pulling according to claim 1, characterized in that, The longitudinal parting surface between the multiple said blocks (210) divides the product cavity.

3. The mold structure for side-pulling without core pulling according to claim 1, characterized in that, The assembly block (210) is provided with a toggle part (211), which is located outside the lower mold (300).

4. The mold structure for side-pulling without core pulling according to claim 1, characterized in that, The core (400) includes an upper mold core (410) and a lower mold core (420). The upper mold core (410) is connected to the upper mold (100), and the lower mold core (420) is connected to the lower mold (300). A parting surface is provided between the upper mold core (410) and the lower mold core (420). The height of the upper mold core (410) and the height of the lower mold core (420) are equal. When the mold is closed, the upper mold core (410) and the lower mold core (420) abut against each other.

5. The mold structure for side-pulling without core pulling according to claim 4, characterized in that, Both the middle parting surface of the upper mold core (410) and the middle parting surface of the lower mold core (420) are provided with a central process tearing groove (430), which is connected to the product cavity.

6. The mold structure for side-pulling without core pulling according to claim 1, characterized in that, Both the upper parting surface of the upper mold (100) and the lower parting surface of the lower mold (300) are provided with parting surface process tearing grooves (110), which are connected to the product cavity.

7. The mold structure for eliminating side core pulling according to any one of claims 1 to 6, characterized in that, The mating surface between the assembly block (210) and the lower mold (300) is set as a pillow-position inclined surface (212), which gradually slopes towards the product cavity from the assembly block (210) to the lower mold (300).

8. The mold structure for eliminating side core pulling according to any one of claims 1 to 6, characterized in that, The upper mold (100) is provided with a first positioning element (120), and the lower mold (300) is provided with a second positioning element (310); when the mold is closed, the first positioning element (120) and the second positioning element (310) are connected.

9. A system for eliminating the need for side-pulling cores, characterized in that, The device includes a machine base, a machine base booster block (500), and a mold structure that eliminates the need for side core pulling as described in any one of claims 1 to 8. The upper mold (100), the lower mold (300), and the machine base booster block (500) are all connected to the machine base, and the machine base booster block (500) is slidably connected to the assembly block (210).

10. The side-pulling-free core-pulling system according to claim 9, characterized in that, A connector (510) is slidably connected to the machine booster block (500), and a sliding groove (520) is provided on the machine booster block (500). The connector (510) is located in the sliding groove (520), and the connector (510) is connected to the assembly block (210).

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