Forming die for O-shaped rubber sealing rings with multiple specifications and different parting surfaces

Abstract

The utility model discloses a multi-specification different parting surface O-shaped rubber sealing ring forming mould which comprises an upper mould plate and a lower mould plate, a plurality of upper mould core holes are arranged on the upper mould plate, a plurality of lower mould core holes are correspondingly arranged on the lower mould plate, a plurality of mould core groups are arranged on the upper mould plate and the lower mould plate, and the mould core groups are arranged on the upper mould plate and the lower mould plate. Each mold core group is provided with different mold cavities and parting surfaces, each mold core group comprises a plurality of mold cores, each mold core comprises an upper mold core and a lower mold core, the upper mold core is mounted in an upper mold core hole of the upper mold plate in a hanging manner, and the lower mold core is mounted in a lower mold core hole of the lower mold plate in a hanging manner. According to the utility model, O-shaped rubber sealing rings with 45-degree parting surfaces and 180-degree parting surfaces, which have the same rubber material and vulcanization three elements in the same range and have different sizes and specifications, are simultaneously processed and formed in the same set of die, so that the processing efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a mold design, in particular to a molding mold for O-shaped rubber sealing rings with multiple specifications and different parting surfaces. Background Art

[0002] At present, most of the 45° parting surface O-shaped rubber seals are produced in a one-mold-one-cavity or one-mold-multiple-cavities mode. The production efficiency of one-mold-one-cavity molds is low. The upper and lower cores of a one-mold-multiple-cavity mold have an interference fit with the upper and lower templates. The upper and lower cores must not only ensure accurate matching, but also have an interference fit with the upper and lower templates. This complex positioning brings great difficulty to mold manufacturing. In addition, the 45° parting surface O-shaped rubber seal is a dynamic sealing component with high product quality requirements. The more cores installed in a set of molds, the more difficult the mold processing is, and the less guaranteed the product quality is.

[0003] In addition, the current production method of O-rings is to use a set of molds to form O-rings with a 45° parting surface or a 180° parting surface of one size specification. This has high production costs and low efficiency, and is particularly unsuitable for the production of small batches of multiple varieties (i.e., different sizes and specifications, different parting surfaces) of O-rings. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the deficiency that the existing O-shaped rubber sealing ring molding mold is not suitable for the production of O-shaped rubber sealing rings with multiple specifications and different parting surfaces, the utility model provides an O-shaped rubber sealing ring molding mold with multiple specifications and different parting surfaces, which can simultaneously mold O-shaped rubber sealing rings with multiple specifications and different parting surfaces.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A multi-specification O-shaped rubber sealing ring forming mold with different parting surfaces comprises an upper mold plate and a lower mold plate, wherein a plurality of upper core holes are arranged on the upper mold plate, and a plurality of lower core holes are correspondingly arranged on the lower mold plate, and a plurality of core groups are installed on the upper mold plate and the lower mold plate, each of the core groups has a different mold cavity and parting surface, and each of the core groups comprises a plurality of cores, each of the cores comprises an upper core and a lower core, the upper core is suspended and installed in the upper core hole of the upper mold plate, and the lower core is suspended and installed in the lower core hole of the lower mold plate.

[0007] The utility model has a plurality of core groups installed on the upper and lower templates, each of which has different cavities and parting surfaces, so that the same rubber material and three vulcanization elements (i.e., vulcanization time, vulcanization temperature, and vulcanization pressure) can be simultaneously processed and formed into O-shaped rubber sealing rings with 45° parting surfaces and 180° parting surfaces of different sizes within the same range.

[0008] In addition, the upper and lower cores of the utility model are suspended and installed in the upper and lower templates, so that the upper and lower cores can be quickly replaced, which greatly reduces the use and maintenance costs of the mold.

[0009] Furthermore, a first groove and a first hanging platform are arranged on the upper core, a first elastic retaining ring is installed in the first groove, a first boss and a first hanging platform mounting groove are arranged in the upper core hole, the first hanging platform is placed in the first hanging platform mounting groove, and the first elastic retaining ring is placed on the first boss.

[0010] Furthermore, a second groove and a second hanging platform are arranged on the lower core, a second elastic retaining ring is installed in the second groove, a second boss and a second hanging platform mounting groove are arranged in the lower core hole, the second hanging platform is placed in the second hanging platform mounting groove, and the second elastic retaining ring extends under the second boss.

[0011] In this way, the upper and lower cores can be hung and installed in the upper and lower templates through the first and second elastic retaining rings and the first and second hanging platforms. The upper and lower cores and the upper and lower templates are matched with large clearances, thereby greatly reducing the difficulty of mold manufacturing.

[0012] Furthermore, the parting surface includes a 45° parting surface and a 180° parting surface, so that the utility model can simultaneously form O-shaped rubber sealing rings with a 45° parting surface and a 180° parting surface.

[0013] Furthermore, error-proofing notches are correspondingly provided on the upper template and the lower template to avoid the occurrence of errors in the installation directions of the upper and lower templates during the mold closing process.

[0014] Furthermore, a first guide column is installed on one side of the upper template and the lower template, and a second guide column is installed on the other side, the first guide column and the second guide column respectively include a fixed section and a movable section, the fixed section is fixedly connected to the lower template, and the movable section is gap-matched with the guide column hole on the upper template to play a guiding role in the mold closing process and prevent the occurrence of bumps and scratches during the mold closing process.

[0015] Furthermore, the cross section of the first guide pillar is smaller than the cross section of the second guide pillar, so as to further avoid the occurrence of errors in the installation directions of the upper and lower templates during the mold closing process.

[0016] Furthermore, support bars for connecting to a vulcanizer are respectively installed on both sides of the upper template and the lower template to facilitate the connection and fixation of the mold of the utility model to the vulcanizer.

[0017] Furthermore, the upper core and the lower core are matched through conical surfaces, so that during the mold closing process, the conical surfaces of the upper and lower cores themselves can be used for guidance and positioning, so that each core works independently without interfering with each other, thereby greatly reducing the difficulty of mold processing.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model realizes the same kind of rubber material, and the three vulcanization elements (i.e., vulcanization time, vulcanization temperature, and vulcanization pressure) in the same range, and the 45° parting surface and 180° parting surface O-shaped rubber sealing rings of different sizes and specifications are simultaneously processed and formed in the same set of molds by optimizing the mold structure, thereby improving the processing efficiency and reducing the production cost.

[0020] 2. The utility model has a simple structure, low manufacturing difficulty, easy use, strong structural integrity, high positioning accuracy, and the molded O-shaped rubber sealing ring has stable size and high surface quality.

[0021] 3. The utility model was tested and used nearly a hundred times, and the qualified rate of the molded parts was above 97%. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a three-dimensional diagram of the O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces of the utility model.

[0024] Figure 2 It is a top view of the O-shaped rubber sealing ring forming mold with different specifications and parting surfaces of the utility model.

[0025] Figure 3 for Figure 2 AA section view.

[0026] Figure 4 This is the top view of the lower template.

[0027] Figure 5 for Figure 4 BB cross-sectional view.

[0028] Figure 6 This is a top view of the upper template.

[0029] Figure 7 This is the CC section view of the upper template.

[0030] Figure 8 This is a cross-sectional view of core set 2.

[0031] Fig. 9 It is a cross-sectional view of core group five.

[0032] Fig.10 The top view of the circlip.

[0033] In the figure: 1 pin; 2 screw; 3 handle; 4 lower template; 5 upper template; 6 first guide post; 7 core group one; 8 error-proofing notch; 9 core group two; 10 core group three; 11 core group four; 12 core group five; 13 second guide post; 14 support bar. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1 - Fig.10 An embodiment of the utility model of a multi-specification O-shaped rubber sealing ring forming mold with different parting surfaces includes a pin 1, a screw 2, a handle 3, a lower template 4, an upper template 5, a first guide column 6, a core group 1 7, an anti-error notch 8, a core group 2 9, a core group 3 10, a core group 4 11, a core group 5 12, a second guide column 13, and a support strip 14.

[0038] The upper template 5 and the lower template 4 are installed with core group 1 7 , core group 2 9 , core group 3 10 , core group 4 11 , and core group 5 12 . Each core group has a cavity 15 and a parting surface 16 of different specifications, and each core group includes a plurality of cores, and each core includes an upper core 17 and a lower core 18 .

[0039] A plurality of upper core holes 51 are arranged on the upper template 5, a first boss 52 and a first hanging platform mounting groove 53 are arranged in the upper core hole 51, a first groove 171 and a first hanging platform 172 are arranged on the upper core 17, a first elastic retaining ring 173 is installed in the first groove 171, the first hanging platform 172 is placed in the first hanging platform mounting groove 53, and the first elastic retaining ring 173 is placed on the first boss 52, so that the upper core 17 is suspended and installed in the upper core hole 51 of the upper template 5.

[0040] A plurality of lower core holes 41 are arranged on the lower template 4 corresponding to the upper core holes 51, a second boss 42 and a second hanging platform mounting groove 43 are arranged in the lower core hole 41, a second groove 181 and a second hanging platform 182 are arranged on the lower core 18, a second elastic retaining ring (not shown) is installed in the second groove 181, the second hanging platform 182 is placed in the second hanging platform mounting groove 43, and the second elastic retaining ring extends under the second boss 42, so that the lower core 18 is suspended and installed in the lower core hole 41 of the lower template 4.

[0041] The parting surface 16 is a 45° parting surface or a 180° parting surface.

[0042] In order to avoid errors in the mold closing process, error-proofing notches 8 are correspondingly provided on the upper template 5 and the lower template 4, and a first guide column 6 is installed on one side of the upper template 5 and the lower template 4, and a second guide column 13 is installed on the other side, and the cross section of the first guide column 6 is smaller than the cross section of the second guide column 13. The first guide column 6 and the second guide column 13 respectively include a fixed section and a movable section, the fixed section is fixedly connected to the lower guide column hole 44 on the lower template 4, and the movable section is clearance-matched with the upper guide column hole 54 on the upper template 5.

[0043] In order to facilitate the connection with the vulcanizer, support strips 14 for connecting to the vulcanizer are respectively installed on both sides of the upper template 5 and the lower template 4.

[0044] When the utility model is used, the molding process of the O-shaped rubber sealing ring can be divided into four processes: fixing the mold, loading the rubber material into the mold, molding, and opening the mold to take out the component.

[0045] The process of fixing the mold: put the mold into the flat plate vulcanizer, connect and fix the upper and lower templates 5 and 4 of the mold to the upper and lower plates of the vulcanizer respectively through the support bar 14 and the limit screws provided by the machine tool, so as to fix the mold on the vulcanizer, and open and close the mold by lifting and lowering the upper and lower plates of the vulcanizer.

[0046] Rubber material mold loading process: start the upper plate of the vulcanizer to open the upper mold plate 5, and put the raw rubber material rings of different specifications prepared in advance into the cavity 15 of the corresponding lower core 18 in turn, and the rubber material mold loading process is completed.

[0047] Molding process: Start the vulcanizer to lower the upper plate, and the upper mold plate 5 with the upper core 17 is gradually closed with the lower mold plate 4 under the guidance of the first guide column 6 and the second guide column 13. The upper and lower cores 17 and 18 are guided and positioned by their own matching cones and work independently, and each group of cores does not interfere with each other. After the mold is closed, the entire mold is pressurized and heated by the upper and lower plates of the vulcanizer. The solid raw rubber ring laid in the cavity 15 becomes a viscous flow and fills the cavity 15. The excess rubber overflows the cavity and flows into the rubber running groove 19 and the outside of the mold body. After the pressurization-decompression is repeated 2 to 3 times (for exhausting the gas in the cavity 15), the heat and pressure are kept for a certain period of time to complete the vulcanization molding of the O-shaped rubber sealing ring.

[0048] The process of opening the mold and removing the parts: After the vulcanization molding of the O-shaped rubber seal ring is completed, the vulcanizer is started to open the mold with the help of the rising plate on the vulcanizer, and then the O-shaped rubber seal ring is taken out and the excess waste in the mold is cleaned. Then the next vulcanization cycle begins.

[0049] The utility model has the following characteristics for the O-shaped rubber sealing ring forming mold with different specifications and parting surfaces:

[0050] 1. Specially designed error-proof notch and guide pins are used to guide the mold in advance to prevent damage to the mold.

[0051] An error-proofing notch 8 is designed on the upper template 5 and the lower template 4 respectively, and the first guide post 6 and the second guide post 13 are designed to be one large and one small (cross section) for error-proofing during the mold closing process. The fixed sections of the first guide post 6 and the second guide post 13 are installed on the lower template 4 with an H7 / s6 interference fit, and the movable sections are used in conjunction with the upper guide post hole 54 on the upper template 5 with a large gap of 0.5mm to 0.7mm on one side. The first and second guide posts 6, 13 installed on the lower template 4 and the upper guide post hole 54 on the upper template 5 do not have a positioning function, but only play a guiding role during the mold closing process to prevent the occurrence of bumps and scratches during the mold closing process.

[0052] 2. Connect with the vulcanizing machine with the help of support bar to realize automatic opening and closing of the mold.

[0053] The upper and lower templates 5 and 4 are positioned by pins 1 on both sides, and the support strips 14 are installed by tightening the screws 2. The upper and lower templates 5 and 4 of the mold are connected and fixed to the upper and lower plates of the vulcanizer through the support strips 14 and the limit screws provided by the machine tool, so that the mold is fixed on the vulcanizer, and the automatic opening and closing of the mold is realized by the lifting of the vulcanizer plate, thereby improving production efficiency.

[0054] 3. Each set of cores is a self-contained system and is flexibly installed in the template, reducing the difficulty of mold manufacturing.

[0055] In order to solve the problem that the core is over-positioned in the template when the traditional 45° parting surface O-shaped rubber sealing ring molding mold is designed with multiple cavities, which makes the mold manufacturing more difficult, the utility model optimizes the core structure, and designs a groove and a hanging platform (such as Figure 8 , Fig. 9 As shown), install it in the core groove as shown Fig.10 The groove width of the elastic retaining ring shown is 0.2mm to 0.3mm larger than the thickness of the elastic retaining ring. The first and second bosses in the upper and lower templates and the outer circle of the corresponding core are matched with a large clearance of 0.15mm to 0.25mm on one side. The core is suspended and installed in the upper and lower templates through the elastic retaining ring and the hanging platform of the core itself (such as Figure 3 ), reducing the difficulty of mold manufacturing.

[0056] The upper core hole 51 and the lower core hole 41 (such as Figure 5 , Figure 7 The diameter of the first and second elastic retaining rings is larger than the outer contour diameter of the first and second elastic retaining rings when they are expanded and assembled (as shown in Figure 3 shown).

[0057] The first and second mounting grooves 53 and 43 in the upper and lower templates (such as Figure 5 , Figure 7 The diameter of the core hanger is larger than the diameter of the corresponding core hanger (as shown in Figure 3 shown).

[0058] The upper and lower core holes 51, 41, the first and second bosses, the first and second hanging platform installation grooves h3, h2, h1 (such as Figure 5 , Figure 7 The depth dimension is smaller than the corresponding H3, H2, H1 (as shown in Figure 8 The height dimension is 0.1mm, which ensures that the upper and lower templates cannot interfere with (or affect) the force on the upper and lower planes of the core group during the use of the assembled mold. Each group of cores suspended in the upper and lower templates is a self-contained system, which uses its own conical surface to achieve guidance, positioning and independent work. Each group of cores does not interfere with each other, greatly reducing the difficulty of mold processing.

[0059] The design and manufacturing accuracy of the mold is all reflected in the structural elements of each group of cores and their related matching, such as the shape and dimensional accuracy of each part of the cavity, and the matching conical surface between the cores. All core groups (such as Figure 3 The height should be consistent, and the height dimension error should be within 0.02mm to ensure that the upper and lower planes of all core groups are under the pressure of the vulcanizer plate when the mold is forming the O-shaped rubber seal. The parallelism and flatness of the upper and lower plates of the vulcanizer should not be greater than 0.02 / 100.

[0060] 4. The core can be installed and removed live, which can realize quick change and low cost of mold use and maintenance.

[0061] The core assembly process is as follows: put the upper core into the upper core hole 51 of the upper template 5, insert the pliers of the special circlip pliers into the first elastic retaining ring 173, expand the first elastic retaining ring 173 and install it into the first groove of the upper core (such as Figure 3 As shown), then remove the circlip pliers, and the upper core assembly process is completed. After removing the circlip pliers, the first elastic retaining ring 173 will stay in the first groove of the upper core (as shown). Figure 3 As shown in FIG. 1 , since the inner hole of the first elastic retaining ring 173 is smaller than the bottom diameter of the first groove, the first elastic retaining ring will be tightened at the bottom of the first groove after being installed in the first groove, and can move in the first groove along the axial direction of the upper mold core when subjected to axial force. Under the action of the first elastic retaining ring and the first hanging platform, the upper mold core will be suspended in the upper mold plate in a floating manner (as shown in FIG. 1 ). Figure 3 Similarly, install the lower core into the lower mold plate.

[0062] The core disassembly process is as follows: insert the pliers head of the circlip pliers into the first elastic retaining ring to expand the first elastic retaining ring and remove it from the first groove of the upper core, and then remove the upper core from the upper core hole of the upper template. Figure 6 , Figure 8 The diameter of the outer contour of the first elastic retaining ring when it is expanded and installed or removed from the groove of the core. Similarly, remove the lower core from the lower template.

[0063] Since each set of cores mounted in the upper and lower templates is a self-contained system, it can be guided, positioned and work independently through its own conical surface. The cores of each set do not interfere with each other. Therefore, when one set of cores is damaged, it does not affect the work of other core sets. It is only necessary to repair or replace the damaged core set separately. There is no need to repair or remake the entire mold, which saves mold maintenance time and cost. The upper and lower templates are made into standard parts, and O-shaped rubber sealing ring forming core sets with different parting surfaces (45° parting surface, 180° parting surface) and various sizes are prepared. Since the cores are movably installed in the upper and lower templates, each set of cores works independently. Therefore, the core set can be flexibly replaced according to production needs to change the production specifications of the rubber ring, improve the processing efficiency of the O-shaped rubber sealing ring, and reduce production costs.

[0064] 5. Lay out the cores in a certain order and mark them to prevent misuse.

[0065] Each core group is arranged according to a certain pattern to facilitate loading and taking out parts. The utility model adopts a 5×5 arrangement, with one core group installed in each column. The arrangement order of the core groups can also be changed according to actual needs, such as 4×5, 3×6, etc. Each core group is marked accordingly to prevent misuse with other cores, affecting product molding or causing mold damage. In addition, the core code and the code of the part to be molded are engraved in the blank and conspicuous part of the core group.

[0066] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. A multi-specification O-shaped rubber sealing ring forming mold with different parting surfaces, comprising an upper mold plate and a lower mold plate, wherein the upper mold plate is provided with a plurality of upper core holes, and the lower mold plate is correspondingly provided with a plurality of lower core holes, characterized in that: A plurality of core groups are installed on the upper template and the lower template, each of the core groups has a different cavity and parting surface, and each of the core groups includes a plurality of cores, each core includes an upper core and a lower core, the upper core is suspended in the upper core hole of the upper template, and the lower core is suspended in the lower core hole of the lower template.

2. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1 is characterized in that: A first groove and a first hanging platform are arranged on the upper core, a first elastic retaining ring is installed in the first groove, a first boss and a first hanging platform mounting groove are arranged in the upper core hole, the first hanging platform is placed in the first hanging platform mounting groove, and the first elastic retaining ring is placed on the first boss.

3. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1 is characterized in that: A second groove and a second hanging platform are arranged on the lower core, a second elastic retaining ring is installed in the second groove, a second boss and a second hanging platform mounting groove are arranged in the lower core hole, the second hanging platform is placed in the second hanging platform mounting groove, and the second elastic retaining ring extends under the second boss.

4. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1 is characterized in that: The parting surface includes a 45° parting surface and a 180° parting surface.

5. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1 is characterized in that: Anti-error notches are correspondingly arranged on the upper template and the lower template.

6. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1, characterized in that: A first guide column is installed on one side of the upper template and the lower template, and a second guide column is installed on the other side. The first guide column and the second guide column respectively include a fixed section and a movable section. The fixed section is fixedly connected to the lower template, and the movable section is gap-matched with the guide column hole on the upper template.

7. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 6, characterized in that: A cross section of the first guide pillar is smaller than a cross section of the second guide pillar.

8. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1, characterized in that: Support bars for connecting to a vulcanizing machine are respectively installed on both sides of the upper template and the lower template.

9. The O-shaped rubber sealing ring forming mold with multiple specifications and different parting surfaces according to claim 1, characterized in that: The upper core and the lower core are matched with each other through a conical surface.

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