Secondary pressing tool in polyurethane rubber mold

Abstract

The utility model relates to the technical field of automobile manufacturing tools, and discloses a polyurethane glue in-mold secondary pressing tool which comprises a robot quick-change disc assembly, a glue coating pipe, an upper module, a lower module and a buckling and pressing assembly used for fixing the upper module and the lower module. The robot quick-change disc assembly is used for carrying the upper module; and the gluing pipe is used for respectively smearing polyurethane glue at the polyurethane glue position A on the upper outer plate of the product and the polyurethane glue position B on the middle lower outer plate of the product. By optimizing the structure of the pressing tool, one-time feeding, one-time gluing and step-by-step multi-time pressing of a product are achieved in the pressing tool, and the technological process is shortened; the butt joint transfer production takt is shortened to about 60 seconds from the traditional about 140 seconds, so that the auxiliary time is greatly shortened, and the production efficiency is improved; on the other hand, the fixed investment cost is saved by about 300,000 compared with that of a traditional scheme, and meanwhile the product percent of pass is increased.

Description

Technical Field

[0001] This utility model relates to the field of automotive manufacturing tooling technology, specifically, a polyurethane molded secondary pressing tooling. Background Technology

[0002] With the promotion and application of new energy vehicles, range anxiety has become particularly prominent. Lightweighting of vehicles is an important way to increase driving range. Replacing steel with plastic can reduce weight by 10% to 30%, and replacing metal tailgates with plastic tailgates is one such application scenario.

[0003] The inner and outer panels of the plastic back door are bonded together with polyurethane adhesive. The pressing fixture is a crucial component in this bonding process, directly impacting the product's dimensions, appearance, performance, and production efficiency. The polyurethane adhesive pressing fixture uses a robot or press to press the inner and outer panels together after the adhesive is applied. Typically, the pressing process is repeated for each outer panel being bonded, resulting in a longer process time, more auxiliary time, lower production efficiency, higher investment in equipment production lines, and greater difficulty in ensuring quality. For example, each additional pressing step adds an extra mold opening and closing action. A single robot docking and transfer takes approximately 30 seconds, increasing the production cycle time by about 60 seconds. Adding a set of upper mold pressing fixtures or a complete pressing fixture would incur fixed costs of approximately 300,000 yuan. If process conditions do not allow for adding a production line, the fixed costs would rise sharply, approaching 10 million yuan. Utility Model Content

[0004] The purpose of this invention is to provide a polyurethane mold for secondary pressing, which solves the problems of low efficiency and high cost of existing equipment when operating on car door panels that require multiple pressings.

[0005] This utility model is achieved through the following technical solution: a secondary pressing fixture for polyurethane molding, comprising a robot quick-change plate assembly, a glue application tube, an upper mold assembly, a lower mold assembly, and a fastening and pressing assembly for fixing the upper and lower mold assemblies; the robot quick-change plate assembly is used to transport the upper mold assembly; the glue application tube is used to apply polyurethane glue to polyurethane glue position A on the upper outer plate of the product and polyurethane glue position B on the lower outer plate of the product; the upper mold assembly includes an upper mold fixing frame, an upper mold fixing plate is mounted on the upper mold fixing frame, a lower outer plate-shaped surface block assembly is mounted on the upper mold fixing plate, and a cylinder assembly is mounted on the upper mold fixing frame, the cylinder assembly including a cylinder support. The system comprises a frame, a cylinder, and an upper outer panel type surface block fixing plate. The output end of the cylinder is connected to the upper outer panel type surface block fixing plate. An upper outer panel type surface block assembly is mounted on the upper outer panel type surface block fixing plate. Suction cup assemblies are provided on both the upper outer panel type surface block assembly and the middle and lower outer panel type surface block assembly. The upper outer panel type surface block assembly is used to support the upper outer panel of the product, and the middle and lower outer panel type surface block assembly is used to support the middle and lower outer panels of the product. The lower module includes a lower mold fixing plate. An inner panel type surface block A assembly and an inner panel type surface block B assembly are mounted on the lower mold fixing plate. Both the inner panel type surface block A assembly and the inner panel type surface block B assembly are used to support the inner panel of the product. A suction cup assembly is provided on the inner panel type surface block B assembly.

[0006] To better realize this utility model, the cylinder bracket further includes a cylinder fixing plate and multiple upper outer plate cylinder fixing plate support columns. The upper outer plate cylinder fixing plate support columns are installed on the upper mold fixing frame, the cylinder fixing plate is installed on the upper outer plate cylinder fixing plate support columns, and the cylinder is installed on the cylinder fixing plate.

[0007] To better realize this utility model, it further includes a reinforcing bracket, which includes a guide post fixing plate and multiple guide posts. The guide posts are slidably connected to the cylinder fixing plate, the guide post fixing plate is connected to the guide posts, and the guide posts are connected to the upper outer plate-shaped surface block fixing plate.

[0008] To better realize this utility model, it further includes an upper and lower mold positioning mechanism, which includes a guide pin and a guide groove. The guide groove is U-shaped. The guide pin is installed on the upper mold fixing frame, and the guide groove is installed on the lower mold fixing plate. The guide pin is inserted into the guide groove to correct the joint position of the upper and lower mold groups.

[0009] To better realize this utility model, the fastening and pressing assembly further includes upper and lower mold pressing cylinders, which are installed on the lower mold fixing plate. A pressure plate is installed at the output end of the upper and lower mold pressing cylinders. When the upper and lower mold pressing cylinders retract, the pressure plate squeezes the upper mold fixing frame to achieve fastening and pressing of the upper and lower mold groups.

[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0011] (1) This utility model achieves one-time loading, one-time gluing, and multiple pressing steps within the pressing tooling by optimizing the structure of the pressing tooling, thus shortening the process flow; the docking and transfer production cycle is shortened from the traditional 140 seconds to about 60 seconds, greatly reducing auxiliary time and improving production efficiency; on the other hand, it also saves about 300,000 yuan in fixed investment costs compared to the traditional solution, and at the same time improves the product qualification rate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a partial structural cross-sectional view of the present invention in the mold-closed state.

[0014] Figure 3 This is a partial structural cross-sectional view of the present invention in the mold-opening state.

[0015] Figure 4 This is a cross-sectional view of the pressing position structure in the mold-closed state.

[0016] Figure 5 This is a cross-sectional view of the adhesive application area in the mold-open state.

[0017] Wherein: 1-Product upper outer panel; 2-Product middle and lower outer panel; 3-Product inner panel; 4-Polyurethane adhesive position A; 5-Polyurethane adhesive position B; 6-Upper outer panel type surface block assembly; 7-Inner panel type surface block A assembly; 8-Middle and lower outer panel type surface block assembly; 9-Suction cup assembly; 10-Upper outer panel type surface block fixing plate; 11-Guide column; 12-Upper outer panel cylinder fixing plate support column; 13-Cylinder; 14-Guide column fixing plate; 15-Cylinder fixing plate; 16-Upper mold fixing frame; 17-Upper mold fixing plate; 18-Lower mold fixing plate; 19-Inner panel type surface block B assembly; 20-Upper and lower mold positioning mechanism; 21-Upper and lower mold clamping cylinder; 22-Robot quick change plate assembly; 23-Glue application tube. Detailed Implementation

[0018] 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 some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Example 1:

[0021] This embodiment provides a secondary pressing fixture for polyurethane molds, specifically as follows: Figures 1-5 As shown, the system includes a robot quick-change tray assembly 22, an adhesive applicator 23, an upper module, a lower module, and a fastening and clamping assembly for fixing the upper and lower modules. The robot quick-change tray assembly 22 is used to transport the upper module. The adhesive applicator 23 is used to apply polyurethane adhesive to polyurethane adhesive positions A4 on the upper outer panel 1 and B5 on the lower outer panel 2 of the product.

[0022] The upper module includes an upper mold fixing frame 16, an upper mold fixing plate 17 is mounted on the upper mold fixing frame 16, a middle and lower outer plate type surface block assembly 8 is mounted on the upper mold fixing plate 17, and a cylinder assembly is mounted on the upper mold fixing frame 16. The cylinder assembly includes a cylinder bracket, a cylinder 13, and an upper outer plate type surface block fixing plate 10. The output end of the cylinder 13 is connected to the upper outer plate type surface block fixing plate 10. An upper outer plate type surface block assembly 6 is mounted on the upper outer plate type surface block fixing plate 10. Suction cup assemblies 9 are provided on both the upper outer plate type surface block assembly 6 and the middle and lower outer plate type surface block assembly 8. The upper outer plate type surface block assembly 6 is used to support the upper outer plate 1 of the product, and the middle and lower outer plate type surface block assembly 8 is used to support the middle and lower outer plate 2 of the product.

[0023] The lower module includes a lower mold fixing plate 18, on which an inner plate type surface block A component 7 and an inner plate type surface block B component 19 are installed. Both the inner plate type surface block A component 7 and the inner plate type surface block B component 19 are used to support the inner plate 3 of the product. The inner plate type surface block B component 19 is provided with a suction cup component 9.

[0024] After the robot quick-change tray assembly 22 transports the upper module to the manual loading station, the worker installs the upper outer panel 1 onto the upper outer panel type surface assembly 6, and the corresponding suction cup assembly 9 holds the upper outer panel 1 in place. Then, the lower middle outer panel 2 is installed onto the lower middle outer panel type surface assembly 8, and the corresponding suction cup assembly 9 holds the lower middle outer panel 2 in place. Simultaneously, the inner panel 3 is installed onto the inner panel type surface assembly A 7 and the inner panel type surface assembly B 19, and the corresponding suction cup assembly 9 holds the inner panel 3 in place. After the worker has fully installed the upper outer panel 1, the lower middle outer panel 2, and the inner panel 3, the robot quick-change tray assembly 22 transports the upper module to the glue application station. At this point, the robotic arm controls the glue application tube 23 to first apply polyurethane glue at position B5, and then tilts it at an angle to apply it at position A4. After the adhesive is applied, cylinder 13 is activated. With the extension of cylinder 13, the upper outer panel fixing plate 10 pushes the upper outer panel assembly 6, causing the upper outer panel 1 of the product to move. This causes the upper outer panel 1 and the lower outer panel 2 of the product to approach and slightly compress the polyurethane adhesive at position A4. Then, the robot quick-change tray assembly 22 moves the upper mold assembly above the lower mold assembly and begins the mold closing operation. At this time, supported by the inner panel A assembly 7, the lower outer panel 2 and the inner panel 3 of the product begin to compress the polyurethane adhesive at position B5. Then, cylinder 13 extends further, causing the upper outer panel 1 and the lower outer panel 2 of the product to further compress the polyurethane adhesive at position A4. Simultaneously, the lower outer panel 2, under pressure, also intensifies the compression of the inner panel 3, achieving secondary compression of the upper outer panel 1, the lower outer panel 2, and the inner panel 3 within the mold. At this point, the clamping and pressing assembly is activated, starting to clamp the upper and lower modules together and maintaining the clamping force. The product enters the initial pressing and solidification stage. After the initial solidification is completed, the clamping and pressing assembly is removed. Simultaneously, cylinder 13 pulls the upper outer panel component 6 back to the gluing position via the upper outer panel fixing plate 10. Then, the robot quick-change tray assembly 22 grabs the upper module to open the mold and transports the upper module to the manual loading station for the next cycle.

[0025] Through the above configuration, the upper outer panel component 6 and the lower middle outer panel component 8 of the upper module are made relatively movable using a cylinder assembly. This allows the upper and lower modules to perform secondary pressing within the mold on the upper outer panel 1, the lower middle outer panel 2, and the inner panel 3 of the product during mold closing, improving the pressing and adhesion effect of the polyurethane adhesive. Simultaneously, since the upper outer panel component 6 and the lower middle outer panel component 8 are separated by a certain distance during adhesive application, the robotic arm only needs to control the deflection of the adhesive application tube 23 when applying adhesive to polyurethane adhesive positions A4 and B5. The robotic arm completes the polyurethane adhesive application at positions A4 and B5 in the same posture, saving approximately 10 seconds of posture adjustment time. During the assembly of the upper and lower molds, the upper outer panel 1, the lower middle outer panel 2, and the inner panel 3 of the product can simultaneously complete the secondary pressing within the mold, saving approximately 30 seconds of posture adjustment and secondary pressing time for the robot quick-change tray assembly 22. The mold opening process of the upper outer panel 1 is synchronized with the mold opening processes of the upper and lower molds, saving approximately 40 seconds of secondary docking and mold opening auxiliary time for the robot quick-change tray assembly 22. In summary, this solution shortens the process flow, reduces equipment tooling auxiliary time by nearly 80 seconds, significantly improves production efficiency, and reduces tooling investment by nearly 300,000 yuan.

[0026] Example 2:

[0027] This embodiment further expands upon the above embodiment by modifying the cylinder bracket, specifically as follows: Figures 1-3 As shown, the cylinder bracket includes a cylinder fixing plate 15 and multiple upper outer plate cylinder fixing plate support columns 12. The upper outer plate cylinder fixing plate support columns 12 are mounted on the upper mold fixing frame 16, the cylinder fixing plate 15 is mounted on the upper outer plate cylinder fixing plate support columns 12, and the cylinder 13 is mounted on the cylinder fixing plate 15.

[0028] By setting the cylinder fixing plate 15, the stability of the cylinder 13 during installation and operation is ensured; at the same time, the travel of the reserved upper outer plate-shaped surface block assembly 6 is increased, which facilitates the application of polyurethane adhesive at polyurethane adhesive positions A4 and B5.

[0029] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0030] Example 3:

[0031] This embodiment is a further extension of embodiment 2, as follows: Figures 1-3 As shown, it also includes a reinforcing bracket, which includes a guide post fixing plate 14 and a plurality of guide posts 11. The guide posts 11 are slidably connected to the cylinder fixing plate 15. The guide post fixing plate 14 is connected to the guide posts 11, and the guide posts 11 are connected to the upper outer plate-shaped surface block fixing plate 10.

[0032] By setting up a reinforced bracket, the upper outer panel type surface block fixing plate 10 is more stable when moving the upper outer panel type surface block assembly 6, preventing the upper outer panel type surface block assembly 6 from shifting during the secondary pressing in the mold, thus improving the pressing quality; at the same time, the torque of the upper outer panel type surface block assembly 6 shifting is transferred from the output end of the cylinder 13 to the guide column 11, preventing the output end of the cylinder 13 from deforming.

[0033] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0034] Example 4:

[0035] This embodiment further extends the above embodiment, specifically as follows: Figure 1 As shown, it also includes an upper and lower mold positioning mechanism 20, which includes a guide pin and a guide groove. The guide groove is U-shaped. The guide pin is installed on the upper mold fixing frame 16, and the guide groove is installed on the lower mold fixing plate 18.

[0036] When assembling the upper and lower molds, guide pins are inserted into guide grooves to correct the engagement position of the upper and lower molds, improve the accuracy of the upper and lower mold assembly, and thus improve the pressing quality.

[0037] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0038] Example 5:

[0039] This embodiment further expands the fastening and clamping assembly based on the above embodiments, specifically as follows: Figure 1 As shown, the fastening and clamping assembly includes upper and lower mold clamping cylinders 21. The upper and lower mold clamping cylinders 21 are mounted on the lower mold fixing plate 18. A pressure plate is installed at the output end of the upper and lower mold clamping cylinders 21. When the upper and lower mold clamping cylinders 21 retract, the pressure plate squeezes the upper mold fixing frame 16 to achieve fastening and clamping of the upper and lower molds.

[0040] By setting up a snap-fit ​​and clamping component, the upper and lower modules can be kept in a press-fitting state, maintaining pressing stability, while freeing up the robot quick-change plate component 22 and reducing power consumption.

[0041] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A secondary pressing tooling for polyurethane molding, characterized in that: The product includes a robot quick-change tray assembly (22), an adhesive applicator (23), an upper module, a lower module, and a fastening and clamping assembly for fixing the upper and lower modules; the robot quick-change tray assembly (22) is used to transport the upper module; the adhesive applicator (23) is used to apply polyurethane adhesive to polyurethane adhesive positions A (4) on the upper outer panel (1) of the product and polyurethane adhesive positions B (5) on the lower outer panel (2) of the product. The upper module includes an upper mold fixing frame (16), an upper mold fixing plate (17) is installed on the upper mold fixing frame (16), a middle and lower outer plate type surface block assembly (8) is installed on the upper mold fixing plate (17), a cylinder assembly is installed on the upper mold fixing frame (16), the cylinder assembly includes a cylinder bracket, a cylinder (13), and an upper outer plate type surface block fixing plate (10), the output end of the cylinder (13) is connected to the upper outer plate type surface block fixing plate (10), an upper outer plate type surface block assembly (6) is installed on the upper outer plate type surface block fixing plate (10), and suction cup assemblies (9) are provided on both the upper outer plate type surface block assembly (6) and the middle and lower outer plate type surface block assembly (8). The upper outer plate type surface block assembly (6) is used to support the upper outer plate (1) of the product, and the middle and lower outer plate type surface block assembly (8) is used to support the middle and lower outer plate (2) of the product. The lower module includes a lower mold fixing plate (18), on which an inner plate type surface block A component (7) and an inner plate type surface block B component (19) are installed. The inner plate type surface block A component (7) and the inner plate type surface block B component (19) are both used to support the inner plate (3) of the product. The inner plate type surface block B component (19) is provided with a suction cup component (9).

2. The polyurethane mold inner secondary pressing tooling according to claim 1, characterized in that: The cylinder bracket includes a cylinder fixing plate (15) and multiple upper outer plate cylinder fixing plate support columns (12). The upper outer plate cylinder fixing plate support columns (12) are installed on the upper mold fixing frame (16). The cylinder fixing plate (15) is installed on the upper outer plate cylinder fixing plate support columns (12). The cylinder (13) is installed on the cylinder fixing plate (15).

3. The polyurethane mold inner secondary pressing tooling according to claim 2, characterized in that: It also includes a reinforcing bracket, which includes a guide post fixing plate (14) and multiple guide posts (11). The guide posts (11) are slidably connected to the cylinder fixing plate (15). The guide post fixing plate (14) is connected to the guide posts (11), and the guide posts (11) are connected to the upper outer plate type surface block fixing plate (10).

4. The polyurethane mold inner secondary pressing tooling according to claim 1, characterized in that: It also includes an upper and lower mold positioning mechanism (20), which includes a guide pin and a guide groove. The guide groove is U-shaped. The guide pin is installed on the upper mold fixing frame (16), and the guide groove is installed on the lower mold fixing plate (18). The guide pin is inserted into the guide groove to correct the position of the upper and lower mold groups.

5. The polyurethane mold inner secondary pressing tooling according to claim 1, characterized in that: The fastening assembly includes upper and lower mold clamping cylinders (21), which are installed on the lower mold fixing plate (18). A pressure plate is installed at the output end of the upper and lower mold clamping cylinders (21). When the upper and lower mold clamping cylinders (21) retract, the pressure plate squeezes the upper mold fixing frame (16) to achieve fastening and clamping of the upper and lower molds.

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