Flat rubber mold capable of feeding and discharging through mechanical arm, forming system and demolding method

Abstract

The invention relates to the technical field of rubber molds, in particular to a flat rubber mold capable of feeding and discharging through a manipulator, a forming system and a demolding method. A flat plate rubber mold capable of achieving feeding and discharging through a mechanical arm comprises an upper mold plate and a lower mold plate, the lower mold plate is provided with a lower mold cavity and a first material nail cavity which are sunken towards the plate face, the upper mold plate is provided with an upper mold column arranged in a protruding mode along the plate face, and the upper mold column is matched with the lower mold cavity; and the upper mold column extends into the lower mold cavity after the upper mold plate and the lower mold plate are closed. According to the flat rubber mold capable of feeding and discharging through the mechanical arm, the mechanical arm can grab vulcanized rubber into the mold and can also grab a workpiece rubber plate for demolding, the demolding efficiency and the production efficiency are effectively improved, the production safety is improved, and the labor cost is reduced; the technical problems that an existing flat rubber mold needs to be in manual contact with high-temperature rubber workpieces or mold parts, production efficiency is low, and safety is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber moulds, and in particular to a flat rubber mould capable of being loaded and unloaded by a robot, a moulding system and a demoulding method. Background Art

[0002] Flat hot-press rubber mold is a common rubber mold. Its production method is to place the rubber raw material in the template and vulcanize and mold the rubber raw material in the mold by heating and pressurizing. The molding temperature during the production process is as high as 170-220℃. Workers need to frequently contact high-temperature rubber parts or mold components during the production process, which is prone to scalding. The production safety is poor and the production efficiency is low. In addition, because rubber has high elasticity and high self-adhesion, the rubber parts and the lower template will form a heat adsorption vacuum adhesion, making it difficult to manually peel and demold. Because the rubber material expands due to heat and overflows, the upper and lower templates cannot be fully fitted, and flash will form in the area between the upper and lower templates. When manually peeling, the flash is easy to tear and remain in the mold cavity, affecting the smoothness of the operation and production continuity. Summary of the invention

[0003] In response to the problems raised by the background technology, the purpose of the present invention is to propose a flat rubber mold that can be loaded and unloaded by a robot, which can be used by the robot to grab the vulcanized rubber material and put it into the mold, and can also be used by the robot to grab the rubber plate of the workpiece for demolding, effectively improving the demolding efficiency and production efficiency, improving production safety, and reducing labor costs, solving the technical problems that the existing flat rubber molds require manual contact with high-temperature rubber parts or mold components, low production efficiency, and poor safety.

[0004] Another object of the present invention is to propose a molding system using the above-mentioned flat rubber mold that can be loaded and unloaded by a robot, so that it is easier to peel off the rubber plate of the workpiece from the lower template. During the peeling process, the flash is intact and not torn, and there is no waste material remaining in the mold cavity. The automated operation is smooth and stable, and the production continuity is good. This solves the technical problem that the rubber plate is easily torn and remains in the mold cavity during the demolding process of the existing molding system, the operation smoothness is poor, and the production continuity is affected.

[0005] Another object of the present invention is to provide a demoulding method applied to the above-mentioned molding system, which makes it easier to peel off the rubber sheet of the workpiece from the lower mold plate, and the rubber sheet of the workpiece can be demoulded smoothly and stably.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A flat rubber mold capable of loading and unloading materials by a robot, comprising an upper mold plate and a lower mold plate, wherein the lower mold plate is provided with a lower mold cavity recessed toward a plate surface and a first material pin cavity, the upper mold plate is provided with an upper mold column protruding along the plate surface, the upper mold column is matched with the lower mold cavity, the upper mold column extends into the lower mold cavity after the upper mold plate and the lower mold plate are molded together, and the cavity formed after the upper mold plate and the lower mold plate are molded together is a molding cavity;

[0008] The lower mold cavity comprises a workpiece cavity and a flash cavity, the workpiece cavity is connected with the flash cavity, and the first material pin cavity is connected with the flash cavity;

[0009] The upper template is provided with a second material nail cavity corresponding to the first material nail cavity, and the second material nail cavity is recessed along the plate surface of the upper template.

[0010] Further explained, the flash cavity includes an outer flash cavity, and the outer flash cavity is arranged outside the workpiece cavity;

[0011] The lower template is also provided with a first connecting cavity recessed toward the plate surface, one end of the first connecting cavity is connected to the outer flash cavity, and the other end of the first connecting cavity is connected to the first material nail cavity.

[0012] Further, the lower mold cavity array is arranged on the lower mold plate, the upper mold column array is arranged on the upper mold plate, and the lower mold cavity and the upper mold column are arranged in a one-to-one correspondence;

[0013] The first material nail cavity is arranged on one side of the end of each row of the lower mold cavities, and a plurality of the first material nail cavity are located on the same side of each row of the lower mold cavities.

[0014] Further explained, the lower template is also provided with a second connecting cavity recessed toward the plate surface, and the second connecting cavity is connected between two adjacent outer flash cavities.

[0015] Further, the lower mold plate is also provided with a plurality of overflow glue grooves recessed toward the plate surface, and the overflow glue grooves are located between two adjacent rows of the lower mold cavities;

[0016] The glue overflow groove located in the middle of the lower template is arranged on the surface of the lower template and passes through the two end edges of the lower template;

[0017] The ends of the glue overflow grooves located on both sides of the lower template are located inside the edge of the lower template.

[0018] It is further explained that the overflow groove is connected to the outer flash cavities of two adjacent rows of the lower mold cavities.

[0019] Further, the flash cavity further comprises an inner flash cavity, the workpiece cavity is annular, the inner flash cavity is arranged inside the workpiece cavity, and the outer flash cavity and the inner flash cavity are respectively connected to the workpiece cavity;

[0020] The upper mold column includes a first molding step, a second molding step and a third molding step arranged in sequence from the outside to the inside;

[0021] When the upper mold plate is molded with the lower mold plate, an outer flash molding cavity is formed between the first molding step and the outer flash molding cavity, a workpiece molding cavity is formed between the second molding step and the workpiece molding cavity, and an inner flash molding cavity is formed between the third molding step and the inner flash molding cavity;

[0022] The longitudinal sections of the outer flash forming cavity and the inner flash forming cavity are respectively rectangular.

[0023] Further, the lower template is provided with a molding area and an avoidance area, the lower mold cavity and the first material nail cavity are both located in the molding area, and the avoidance area is arranged around the periphery of the molding area;

[0024] The horizontal plane height where the upper end surface of the avoidance zone is located is lower than the horizontal plane height where the upper end surface of the molding zone is located.

[0025] A molding system comprises a grabbing and blowing mechanism and a flat rubber mold capable of loading and unloading materials by a manipulator, wherein the molding cavity is used to mold a rubber plate of a workpiece, and material nails are formed on the rubber plate of the workpiece after the upper mold plate and the lower mold plate are molded together;

[0026] The grabbing and blowing mechanism includes a manipulator and a blowing pipe, wherein the manipulator is used to grab the material pins and separate the workpiece rubber plate from the lower template when the upper template and the lower template are opened; the blowing pipe moves synchronously with the manipulator, and the blowing end of the blowing pipe is arranged in the direction of the manipulator, and the blowing pipe is used to blow air toward the separation point between the workpiece rubber plate and the lower template.

[0027] A demoulding method is applied to the molding system, and the demoulding method comprises the following steps:

[0028] The manipulator grabs the material pins and separates the workpiece rubber plate from the lower template when the upper template and the lower template are opened, and the air blowing pipe moves synchronously with the manipulator, and the air blowing pipe blows toward the separation point between the workpiece rubber plate and the lower template.

[0029] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0030] The above-mentioned flat rubber mold that can be loaded and unloaded by a robot can be used by the robot to grab the vulcanized rubber material and put it into the mold, and can also be used by the robot to grab the rubber plate of the workpiece for demolding, effectively improving the demolding efficiency and production efficiency, improving production safety, and reducing labor costs. It solves the technical problems that the existing flat rubber mold requires manual contact with high-temperature rubber parts or mold components, low production efficiency, and poor safety.

[0031] The molding system of the flat rubber mold capable of loading and unloading materials by a robot is used, and the robot is used to grab the material pins to demould the whole plate of the workpiece rubber sheet. The air blowing pipe can also cooperate with the robot. The robot performs a book-turning action and assists in blowing to remove the vacuum from the whole plate of the workpiece rubber sheet. The blowing end of the air blowing pipe is arranged in the direction of the robot. The air blowing pipe is used to blow air toward the separation point between the workpiece rubber sheet and the lower template. The gas blown into the bottom side of the workpiece rubber sheet can weaken the vacuum adsorption adhesion force between the workpiece rubber sheet and the lower template, making it easier to peel the workpiece rubber sheet from the lower template. In the process of peeling, the flash is intact and not torn, and there is no waste material remaining in the mold cavity. The automated operation is smooth and stable, and the production continuity is good. The technical problems that the rubber sheet is easily torn and remains in the mold cavity during the demoulding process of the existing molding system, the operation smoothness is poor, and the production continuity is affected are solved.

[0032] The demoulding method applied to the above molding system makes it easier to peel off the rubber sheet of the workpiece from the lower mold plate, so that the rubber sheet of the workpiece can be demoulded smoothly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The present invention is a three-dimensional diagram of a flat rubber mold and a rubber plate for a workpiece that can be loaded and unloaded by a robot according to an embodiment of the present invention.

[0034] Figure 2 The present invention is a stereoscopic diagram of a lower mold plate of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0035] Figure 3 yes Figure 2 Enlarged view of point A.

[0036] Figure 4 The present invention is a top view of a lower mold plate of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0037] Figure 5 The present invention is a schematic diagram of a material discharge area of ​​a lower mold plate of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0038] Figure 6 The present invention is a three-dimensional back view of an upper mold plate of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0039] Figure 7It is a schematic diagram of a flat rubber mold that can be loaded and unloaded by a robot according to an embodiment of the present invention (there is a workpiece rubber plate in the molding cavity).

[0040] Figure 8 yes Figure 7 Enlarged view of point B.

[0041] Fig. 9 The present invention is a stereoscopic view of a rubber plate formed by a molding cavity of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0042] Fig.10 It is a back stereoscopic view of a rubber plate of a workpiece formed by a molding cavity of a flat rubber mold capable of loading and unloading by a robot according to an embodiment of the present invention.

[0043] Fig.11 yes Fig.10 Enlarged view of point C.

[0044] Fig.12 It is a schematic diagram of a molding system according to an embodiment of the present invention in a mold opening state ready for demolding.

[0045] Fig.13 It is a schematic diagram of demoulding using a grabbing and blowing mechanism in a molding system of an embodiment of the present invention in a mold opening state.

[0046] Wherein: upper template 1, upper mold column 11, first molding step 111, second molding step 112, third molding step 113, second material nail cavity 12, guide column 13, lower template 2, lower model cavity 21, workpiece cavity 211, flash cavity 212, outer flash cavity 2121, inner flash cavity 2122, first material nail cavity 22, first connecting cavity 23, second connecting cavity 24, overflow groove 25, molding area 26, avoidance area 27, Guide sleeve 28, mounting groove 29, workpiece rubber plate 3, material nail 31, workpiece 32, flash 33, inner flash 331, inner flash film 3311, inner tear edge ring 3312, outer flash 332, outer flash film 3321, outer tear edge ring 3322, connecting strip 34, molding cavity 4, outer flash molding cavity 5, workpiece molding cavity 6, inner flash molding cavity 7, grabbing and blowing mechanism 8, manipulator 81, clamping arm 811, blowing pipe 82, blowing nozzle 821. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0049] like Figures 1 to 13 As shown, a flat rubber mold capable of loading and unloading materials by a robot comprises an upper mold plate 1 and a lower mold plate 2, wherein the lower mold plate 2 is provided with a lower mold cavity 21 recessed toward the plate surface and a first material nail cavity 22, and the upper mold plate 1 is provided with an upper mold column 11 protruding along the plate surface, the upper mold column 11 is matched with the lower mold cavity 21, and the upper mold column 11 extends into the lower mold cavity after the upper mold plate 1 and the lower mold plate 2 are molded together, and the cavity formed after the upper mold plate 1 and the lower mold plate 2 are molded together is a molding cavity 4;

[0050] The lower mold cavity 21 includes a workpiece cavity 211 and a flash cavity 212, the workpiece cavity 211 is connected to the flash cavity 212, and the first material nail cavity 22 is connected to the flash cavity 212;

[0051] The upper template 1 is provided with a second material nail cavity 12 corresponding to the first material nail cavity 22 , and the second material nail cavity 12 is recessed along the plate surface of the upper template 1 .

[0052] By setting the upper template 1 and the lower template 2, the cavity formed by the upper template 1 and the lower template 2 after the mold is closed is the molding cavity 4, and the molding cavity 4 is used to mold the rubber plate 3 of the product. When the product is produced, the rubber material (such as Figure 5As shown, the dotted area is the material discharge area of ​​the manipulator 81. When the rubber material expands due to heat, the material overflows from the seam. Therefore, the upper template 1 and the lower template 2 cannot be fully fitted. A thin sheet of flash 33 will also be formed in the area between the upper template 1 and the lower template 2 that is not the workpiece cavity 211. The flash 33 will be removed by the trimming process later. By setting the first material pin cavity 22 in the lower template 2 and the second material pin cavity 12 in the upper template 1, material pins 31 are formed on the workpiece rubber plate 3 after the upper template 1 and the lower template 2 are molded together. The material pins 31 are protruding along the plate surface of the workpiece rubber plate 3. After the flat rubber mold is molded together, the rubber material is hot-melted, vented, pressure maintained and molded, the material pins 31 can be grabbed by the manipulator 81. The material pins 31 are process grabbing points. The workpiece rubber plate 3 is pulled up from the lower template 2 by grabbing the material pins 31 to achieve demolding of the workpiece rubber plate 3.

[0053] Specifically, since the first material pin cavity 22 is connected to the flash cavity 212, the formed part 32, the flash 33 and the material pin 31 are integrally formed on the part rubber sheet 3, when the manipulator 81 grabs the material pin 31 and pulls it up, the whole part rubber sheet 3 can be pulled up. In addition, when the part rubber sheet 3 needs to be trimmed, the material pin 31 can be removed together with the flash 33 without affecting the part itself.

[0054] The flat rubber mold capable of loading and unloading materials by a robot can be used by the robot 81 to grab the vulcanized rubber material and put it into the mold, and can also be used by the robot 81 to grab the rubber plate 3 of the workpiece for demolding, thereby effectively improving the demolding efficiency and production efficiency, improving production safety, and reducing labor costs, thereby solving the technical problems of the existing flat rubber mold that requires manual contact with high-temperature rubber parts or mold components, low production efficiency, and poor safety.

[0055] like Figure 3 As shown, it is further explained that the flash cavity 212 includes an outer flash cavity 2121, and the outer flash cavity 2121 is arranged outside the workpiece cavity 211;

[0056] The lower template 2 is also provided with a first connecting cavity 23 recessed toward the plate surface, one end of the first connecting cavity 23 is connected to the outer flash cavity 2121 , and the other end of the first connecting cavity 23 is connected to the first material nail cavity 22 .

[0057] After the vulcanization molding of the workpiece rubber sheet 3, the rubber has high elasticity and good tear resistance, and has high self-adhesion, so the workpiece rubber sheet 3 forms a heat adsorption vacuum adhesion with the lower template 2. By setting the first connection cavity 23, the first connection cavity 23 is connected to the outer flash cavity 2121, that is, the first connection cavity 23 and the first material nail cavity 22 are also located on the outside of the workpiece cavity 211, rather than on the inside of the workpiece cavity 211, so that the material nail 31 formed on the workpiece rubber sheet 3 is also located on the outside of the workpiece 32. When the manipulator 81 grabs the material nail 31 and pulls it up, it can start to pull from the outer edge of the workpiece rubber sheet 3. When pulling, the vacuum phenomenon between the workpiece rubber sheet 3 and the lower template 2 is quickly broken along the pulling position, so that the demoulding efficiency is higher.

[0058] In addition, by setting the first connecting cavity 23, a connecting block can be formed on the workpiece rubber plate 3, and the connecting block is used to connect the material pin 31 and the flash 33, so as to realize the series connection of the material pin 31 and the flash 33, improve the smoothness during pulling, and avoid the connection between the material pin 31 and the flash 33 from being torn, thereby preventing the workpiece rubber plate 3 from sticking to the mold.

[0059] like Figure 2 As shown, it is further explained that the lower mold cavities 21 are arranged in an array on the lower mold plate 2, and the upper mold columns 11 are arranged in an array on the upper mold plate 1, and the lower mold cavities 21 and the upper mold columns 11 are arranged in a one-to-one correspondence;

[0060] The first material nail cavity 22 is arranged on one side of the end of each row of the lower mold cavities 21 , and a plurality of the first material nail cavity 22 are located on the same side of each row of the lower mold cavities 21 .

[0061] By setting the lower mold cavities 21 arranged in an array and the upper mold columns 11 arranged in an array, it is possible to realize the molding of multiple parts on the same part rubber sheet 3 in the same processing process. In addition, when multiple rows of the lower mold cavities 21 are provided, if the first material nail cavity 22 is only provided at the end of one row of the lower mold cavities 21, when the manipulator 81 grabs the material nail 31 and pulls it upward, the flash 33 is easily subjected to force to form a long-distance stretching and tearing, causing mold sticking, making it difficult to clean the mold and affecting production continuity. The present invention sets the first material nail cavity 22 on one side of the end of each row of the lower mold cavities 21, and multiple first material nail cavities 22 are located on the same side of each row of the lower mold cavities 21, so that the manipulator 81 can clamp all the material nails 31 at the same time and pull them upward synchronously, thereby improving the uniformity of the force when pulling the part rubber sheet 3, avoiding the phenomenon that the flash is easily torn off due to the pulling force being concentrated at a certain point, and there will be no mold sticking during the demolding process, and the production continuity is good.

[0062] like Figure 3 As shown, it is further explained that the lower template 2 is also provided with a second connecting cavity 24 recessed toward the plate surface, and the second connecting cavity 24 is connected between two adjacent outer flash cavities 2121.

[0063] By setting the second connecting cavity 24, one end of the second connecting cavity 24 is connected to one of the outer flash cavities 2121, and the other end of the second connecting cavity 24 is connected to another outer flash cavity 2121, thereby realizing the series connection between the two adjacent outer flash cavities 2121. In the workpiece rubber sheet 3, a connecting strip 34 is connected between the two flashes 33 formed by the two adjacent outer flash cavities 2121, so that the robot 81 can completely pull out the workpiece rubber sheet 3 when pulling and demolding, thereby avoiding the flash 33 from being easily torn and causing mold sticking due to elastic stretching during the pulling process due to its thin thickness.

[0064] like Figure 4 As shown, it is further explained that the lower mold plate 2 is also provided with a plurality of overflowing glue grooves 25 which are recessed toward the plate surface, and the overflowing glue grooves 25 are located between two adjacent rows of the lower mold cavities 21;

[0065] The glue overflow groove 25 located in the middle of the lower template 2 is arranged on the surface of the lower template 2 and passes through the two end edges of the lower template 2;

[0066] The ends of the glue overflow grooves 25 located on both sides of the lower template 2 are located inside the edge of the lower template 2 .

[0067] Since the rubber material expands when heated and overflows, the upper mold plate 1 and the lower mold plate 2 cannot be fully fitted, and a thin sheet of flash 33 is formed in the area between the upper mold plate 1 and the lower mold plate 2 that is not the mold cavity 211 of the product. For molded products, the thinner the flash 33 is, the better. When the mold cavity design of the mold is unreasonable, the rubber material flows unevenly when hot-melting, which will cause the flash 33 of the rubber plate 3 of the product to be too thick, thereby causing a series of defects such as unqualified product size, lack of glue in some areas of the product, and difficulty in separating the flash.

[0068] By setting the overflow glue groove 25, and the overflow glue groove 25 located in the middle of the lower template 2 is set on the surface of the lower template 2 and penetrates the two end edges of the lower template 2, that is, the overflow glue groove 25 located in the middle of the lower template 2 adopts a full-through path, and the ends of the overflow glue grooves 25 located on both sides of the lower template 2 are located on the inner side of the edge of the lower template 2, that is, the overflow glue grooves 25 located on both sides of the lower template 2 adopt a semi-through path structure, which can control the glue flow rate of different positions of the lower template 2.

[0069] The overflow glue groove 25 in the middle of the lower template 2 adopts a full-through path, which is connected to the two ends of the lower template 2, and can increase the flow rate of the excess glue in the middle of the lower template 2. During the process of melting and cross-linking of the glue, the excess glue inside can be discharged out of the mold better, avoiding excessive thickness of the flash after the cross-linking and vulcanization of the glue. The overflow glue grooves 25 located on both sides of the lower template 2 adopt a semi-through path structure, which is not connected to the edge of the lower template 2, and can slow down the flow rate of the excess glue on both sides of the lower template 2, avoiding the excessive loss of glue in the side area, resulting in insufficient glue in the cavity parts and affecting the density of the product.

[0070] like Figure 3 As shown, specifically, the glue overflow groove 25 is connected to the outer flash cavities 212 of the two adjacent rows of the lower mold cavities 21 .

[0071] By connecting the overflow glue groove 25 with the outer flash cavity 212 of the two adjacent rows of the lower model cavities 21, the overflow glue groove 25 is connected between the two adjacent rows of the lower model cavities 21 as a skeleton, so that multiple rows of the lower model cavities 21 are connected in series to ensure the pulling integrity of the workpiece rubber plate 3.

[0072] like Figure 7 and Figure 8 As shown, it is further explained that the flash cavity 212 also includes an inner flash cavity 2122, the workpiece cavity 211 is annular, the inner flash cavity 2122 is arranged on the inner side of the workpiece cavity 211, and the outer flash cavity 2121 and the inner flash cavity 2122 are respectively connected to the workpiece cavity 211;

[0073] The upper mold column 11 includes a first molding step 111, a second molding step 112 and a third molding step 113 which are arranged in sequence from the outside to the inside;

[0074] When the upper mold plate 1 is molded with the lower mold plate 2, an outer flash molding cavity 5 is formed between the first molding step 111 and the outer flash molding cavity 2121, a workpiece molding cavity 6 is formed between the second molding step 112 and the workpiece molding cavity 211, and an inner flash molding cavity 7 is formed between the third molding step 113 and the inner flash molding cavity 2122;

[0075] The outer flash forming cavity 5 and the inner flash forming cavity 7 have longitudinal sections that are rectangular.

[0076] Specifically, Fig. 9 , Fig.10 and Fig.11As shown, the workpiece rubber plate 3 includes a flash 33, a workpiece 32 and a material nail 31. The workpiece 32 is ring-shaped. The workpiece 32 is a rubber sealing ring product. The inner and outer sides of the workpiece 32 are both flashes 33. The flash 33 includes an inner flash 331 and an outer flash 332. The flash located on the inner side of the workpiece 32 is the inner flash 331, and the flash located on the outer side of the workpiece 32 is the outer flash 332.

[0077] By arranging the first molding step 111, the second molding step 112 and the third molding step 113 on the upper mold column 11, the longitudinal sections of the outer flash molding cavity 5 and the inner flash molding cavity 7 are respectively rectangular, and the parting surface between the upper template 1 and the lower template 2 adopts a rectangular flash mouth process, and the adjacent outer flash cavities 2121 are connected in series through the second connecting cavity 24 to realize the connection of the outer flash, thereby improving the tear strength of the workpiece rubber plate 3 when the cavity and the cavity workpiece are pulled out of the mold.

[0078] Specifically, the outer flash 332 is composed of an outer flash film 3321 (a film formed by the molding area between the lower template 2 and the upper template 1 except the lower mold cavity 21) and an outer tearing edge ring 3322 formed by the outer flash molding cavity 5, and the longitudinal section of the outer tearing edge ring 3322 is rectangular. The inner flash 331 is composed of an inner flash film 3311 (a film formed by the molding area between the lower template 2 and the upper template 1 except the lower mold cavity 21) and an inner tearing edge ring 3312 formed by the inner flash molding cavity 7, and the tearing position is between the inner tearing edge ring 3312 and the workpiece 32 and between the outer tearing edge ring 3322 and the workpiece 32. A rectangular tearing edge process is adopted, and a connecting strip 34 formed by the second connecting cavity 23 is connected between two adjacent outer tearing edge rings 3322, which can effectively improve the pulling stability of the workpiece rubber plate 3 by the manipulator 81.

[0079] In addition, when the mold is closed, the horizontal distance H between the vertical surface of the first molding step 111 and the vertical surface of the part molding cavity 6 is preferably 0.08-0.13 mm. A tear gap can be formed between the vertical surface of the first molding step 111 and the vertical surface of the part molding cavity 6 for tearing during trimming between the part 32 and the outer tear edge ring 3322. When the rubber sheet of the part 32 is not cooled, the connecting glue line at the tear gap has good tear resistance elasticity, so that the whole plate extraction stability of the rubber sheet 3 of the part is better, the cavity pressure holding performance is better, the molding density is high, and the dimensional accuracy is guaranteed. Secondly, the thickness of the tear edge gap can be better controlled within 0.08-0.13 mm, the product trimming effect is good, and the tearing is easy and clean. Preferably, when the thickness of the outer flash film 3321 is controlled at 0.05-0.13 mm, the produced part 32 has better precision and appearance quality, while when the thickness of the outer flash film 3321 is above 0.13 mm, the tearing gap formed by the mold becomes larger, and the sharp edge line of the product has rubber burrs after the trimming process.

[0080] After the rubber plate 3 of the product formed by the flat rubber mold of the present invention is cooled, a point is pierced from the tear gap, and the product 32 and the flash 33 are easily and smoothly separated, and the arc corner edge of the rubber surface of the product 32 has no burrs.

[0081] like Figure 2 and Figure 4 As shown ( Figure 4 The middle section line area is the avoidance area 27 area), preferably, the lower template 2 is provided with a molding area 26 and an avoidance area 27, the lower mold cavity 21 and the first material nail cavity 22 are both located in the molding area 26, and the avoidance area 27 is arranged around the periphery of the molding area 26;

[0082] The horizontal plane height of the upper end surface of the avoidance area 27 is lower than the horizontal plane height of the upper end surface of the molding area 26 .

[0083] By setting the avoidance area 27, and the horizontal plane height of the upper end surface of the avoidance area 27 is lower than the horizontal plane height of the upper end surface of the molding area 26, when the upper mold 1 and the lower mold 2 are closed, the contact area can be reduced, thereby increasing the unit pressure of the mold and improving the molding effect.

[0084] Preferably, the height difference between the horizontal plane height where the upper end surface of the avoidance area 27 is located and the horizontal plane height where the upper end surface of the molding area 26 is located is 0.15-0.2 mm.

[0085] Further explanation, the upper template 1 is provided with a guide column 13, and the lower template 2 is provided with a guide sleeve 28 matching the upper template 1. When the mold is closed, the guide column 13 extends into the corresponding guide sleeve 28, and the guide column 13 and the guide sleeve 28 can play a guiding role to achieve accurate alignment between the upper template 1 and the lower template 2. Specifically, the four corners of the upper template 1 are respectively provided with the guide column 13, and the four corners of the lower template 2 are respectively provided with the guide sleeve 28, and the guide column 13 and the guide sleeve 28 are arranged in a one-to-one correspondence.

[0086] In addition, the upper template 1 and the lower template 2 are respectively provided with the installation groove 29 to facilitate the installation of the upper template 1 and the lower template 2.

[0087] like Fig.12 and Fig.13 As shown ( Fig.13 The dotted arrow indicates the grabbing direction of the manipulator 81, and the straight arrow indicates the demoulding direction of the workpiece rubber plate 3), a molding system, including a grabbing and blowing mechanism 8 and the flat rubber mold that can be loaded and unloaded by the manipulator, the molding cavity 4 is used to mold the workpiece rubber plate 3, and the upper mold plate 1 and the lower mold plate 2 are molded to form material pins 31 on the workpiece rubber plate 3;

[0088] The grabbing and blowing mechanism 8 includes a manipulator 81 and a blowing pipe 82, wherein the manipulator 81 is used to grab the material pin 31 and separate the workpiece rubber plate 3 from the lower template 2 when the upper template 1 and the lower template 2 are opened; the blowing pipe 82 moves synchronously with the manipulator 81, and the blowing end of the blowing pipe 82 is set in the direction of the manipulator 81, and the blowing pipe 82 is used to blow air toward the separation point between the workpiece rubber plate 3 and the lower template 2.

[0089] The production process of rubber molded parts is as follows: robot 81 releases glue - mold closing - hot melting of rubber - exhaust - pressure maintenance - mold opening - robot 81 takes out the rubber plate 3 of the product (mold removal) - trimming. The trimming process refers to the fact that during the production of rubber molded products, there will always be excess rubber flowing into the parting surface, which makes the vulcanized product have excess rubber edges. Trimming is the process of removing the excess material after the product is vulcanized. The trimming process will directly affect the appearance, performance and dimensional accuracy of the product.

[0090] The molding system of the present invention adopts the flat rubber mold capable of loading and unloading materials by the manipulator, and the manipulator 81 can be used to automatically grab the vulcanized rubber material into the mold, and the manipulator 81 can also be used to grab the material pins 31 on the workpiece rubber plate 3 to realize demolding. Since the flash 33 of the workpiece rubber plate 3 made by the flat rubber mold is very thin, the product trimming is easy and clean. If the workpiece rubber plate 3 (especially the thin flash 33) is too tight to the mold cavity by vacuum hot bonding, the rubber surface of the flash is easily pulled and torn during the operation of the manipulator 81, and the cooked rubber residues remain in the mold cavity and are difficult to clean, which affects the quality of the next molded part 32 and even damages the mold.

[0091] The present invention adopts the flat rubber mold, not only can the single row of material nails 31 be used as the process grabbing point, the manipulator 81 is used to grab the material nails 31 to demould the whole plate of the workpiece rubber plate 3, the blowing pipe 82 can also cooperate with the manipulator 81, the manipulator 81 uses the action of turning a book and assists with blowing to remove the vacuum from the whole plate of the workpiece rubber plate 3, the blowing end of the blowing pipe 82 is arranged in the direction of the manipulator 81, and the blowing pipe 82 is used to push the workpiece rubber plate 3 and the Air is blown at the separation point of the lower template 2. The gas blown into the bottom side of the workpiece rubber sheet 3 can weaken the vacuum adsorption adhesion force between the workpiece rubber sheet 3 and the lower template 2, making it easier to peel off the workpiece rubber sheet 3 from the lower template 2. In addition, the flash is intact and not torn during the peeling process, and there is no waste material remaining in the mold cavity. The automated operation is smooth and stable, and the production continuity is good. This solves the technical problem that the workpiece rubber sheet 3 is easily torn and remains in the mold cavity during the demolding process of the existing molding system, the operation smoothness is poor, and the production continuity is affected.

[0092] Specifically, the manipulator 81 includes two clamping arms 811, and the clamping arms 811 of the manipulator 81 are in the shape of long strips. The clamping arms 811 of the manipulator 81 are extended along the arrangement direction of the material nails 31. When the manipulator 81 clamps the material nails 31, it clamps all the material nails 31 in a row and pulls them upward synchronously.

[0093] One end of the blowing pipe 82 is connected to a blowing nozzle 821, and the other end of the blowing pipe 82 is connected to an air source through a valve. The blowing nozzle 821 can be a round nozzle or a flat nozzle, preferably a flat nozzle. The blowing nozzle 821 with a flat nozzle matches the fitting surface (flat linear) between the workpiece rubber plate 3 and the lower template 2, so that the blowing effect is better and the effect of weakening the vacuum adsorption adhesion force between the workpiece rubber plate 3 and the lower template 2 is better. Specifically, the blowing nozzle 821 can be installed on the moving arm of the manipulator 81 together with the clamping arm 811 to achieve synchronous movement of the blowing nozzle 821 and the clamping arm 811. The blowing pipe 82 can be a universal bamboo-jointed blowing pipe, which can conveniently adjust the blowing direction so that the blowing end of the blowing pipe 82 is accurately aligned with the separation point of the workpiece rubber plate 3 and the lower template 2.

[0094] A demoulding method is applied to the molding system, and the demoulding method comprises the following steps:

[0095] The manipulator 81 grabs the material pin 31 and separates the workpiece rubber plate 3 from the lower template 2 when the upper template 1 and the lower template 2 are opened, and the air blow pipe 82 moves synchronously with the manipulator 81, and the air blow pipe 82 blows toward the separation point between the workpiece rubber plate 3 and the lower template 2.

[0096] After the vulcanization molding of the workpiece rubber sheet 3, since rubber has high elasticity and good tear resistance, and high self-adhesion, the flash of the whole plate of the workpiece rubber sheet 3 and the workpiece form a heat adsorption vacuum adhesion with the lower template 2, which is difficult to peel and remove manually. After molding, the workpieces between the cavities are each centered and shrunk, and the rubber material connected in series between the cavities is in a high elastic stretch state and is strongly adsorbed on the template. The present invention uses the manipulator 81 to synchronously grab the single row of material nails 31, and removes the vacuum mold of the whole plate of the workpiece rubber sheet 3 by turning the book and assisting with blowing. The gas blown into the bottom side of the workpiece rubber sheet 3 can weaken the vacuum adsorption adhesion between the workpiece rubber sheet 3 and the lower template 2, making it easier to peel and remove the workpiece rubber sheet 3 from the lower template 2, and making the workpiece rubber sheet 3 demold smoothly and stably.

[0097] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A flat rubber mold that can be loaded and unloaded by a robot, characterized in that: The mold comprises an upper mold plate and a lower mold plate, wherein the lower mold plate is provided with a lower mold cavity recessed toward the plate surface and a first material nail mold cavity, the upper mold plate is provided with an upper mold column protruding along the plate surface, the upper mold column is matched with the lower mold cavity, the upper mold column extends into the lower mold cavity after the upper mold plate and the lower mold plate are molded together, and the cavity formed after the upper mold plate and the lower mold plate are molded together is a molding cavity; The lower mold cavity comprises a workpiece cavity and a flash cavity, the workpiece cavity is connected with the flash cavity, and the first material pin cavity is connected with the flash cavity; The upper template is provided with a second material nail cavity corresponding to the first material nail cavity, and the second material nail cavity is recessed along the plate surface of the upper template.

2. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 1, characterized in that: The flash cavity comprises an outer flash cavity, and the outer flash cavity is arranged outside the workpiece cavity; The lower template is also provided with a first connecting cavity recessed toward the plate surface, one end of the first connecting cavity is connected to the outer flash cavity, and the other end of the first connecting cavity is connected to the first material nail cavity.

3. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 2, characterized in that: The lower mold cavity array is arranged on the lower mold plate, the upper mold column array is arranged on the upper mold plate, and the lower mold cavity and the upper mold column are arranged in a one-to-one correspondence; The first material nail cavity is arranged on one side of the end of each row of the lower mold cavities, and a plurality of the first material nail cavity are located on the same side of each row of the lower mold cavities.

4. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 3, characterized in that: The lower template is also provided with a second connecting cavity recessed toward the plate surface, and the second connecting cavity is connected between two adjacent outer flash cavities.

5. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 3, characterized in that: The lower mold plate is also provided with a plurality of overflow glue grooves which are recessed toward the plate surface, and the overflow glue grooves are located between two adjacent rows of the lower mold cavities; The glue overflow groove located in the middle of the lower template is arranged on the surface of the lower template and passes through the two end edges of the lower template; The ends of the glue overflow grooves located on both sides of the lower template are located inside the edge of the lower template.

6. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 5, characterized in that: The overflowing glue groove is communicated with the outer flash cavities of two adjacent rows of the lower mold cavities.

7. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 2, characterized in that: The flash cavity further comprises an inner flash cavity, the workpiece cavity is annular, the inner flash cavity is arranged on the inner side of the workpiece cavity, and the outer flash cavity and the inner flash cavity are respectively connected to the workpiece cavity; The upper mold column includes a first molding step, a second molding step and a third molding step arranged in sequence from the outside to the inside; When the upper mold plate is molded with the lower mold plate, an outer flash molding cavity is formed between the first molding step and the outer flash molding cavity, a workpiece molding cavity is formed between the second molding step and the workpiece molding cavity, and an inner flash molding cavity is formed between the third molding step and the inner flash molding cavity; The longitudinal sections of the outer flash forming cavity and the inner flash forming cavity are respectively rectangular.

8. The flat rubber mold capable of being loaded and unloaded by a robot according to claim 1, characterized in that: The lower template is provided with a molding area and an avoidance area, the lower mold cavity and the first material nail cavity are both located in the molding area, and the avoidance area is arranged around the periphery of the molding area; The horizontal plane height where the upper end surface of the avoidance zone is located is lower than the horizontal plane height where the upper end surface of the molding zone is located.

9. A molding system, characterized in that: It comprises a grabbing and blowing mechanism and a flat rubber mold capable of loading and unloading by a robot as claimed in any one of claims 1 to 8, wherein the molding cavity is used to mold a rubber plate of a workpiece, and material pins are formed on the rubber plate of the workpiece after the upper mold plate and the lower mold plate are molded together; The grabbing and blowing mechanism includes a manipulator and a blowing pipe, wherein the manipulator is used to grab the material pins and separate the workpiece rubber plate from the lower template when the upper template and the lower template are opened; the blowing pipe moves synchronously with the manipulator, and the blowing end of the blowing pipe is arranged in the direction of the manipulator, and the blowing pipe is used to blow air toward the separation point between the workpiece rubber plate and the lower template.

10. A demoulding method, characterized in that: Applied to the molding system as claimed in claim 9, the demoulding method comprises the following steps: The manipulator grabs the material pins and separates the workpiece rubber plate from the lower template when the upper template and the lower template are opened, and the air blowing pipe moves synchronously with the manipulator, and the air blowing pipe blows toward the separation point between the workpiece rubber plate and the lower template.

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