Secondary pressing tool in polyurethane rubber mold

Abstract

The invention 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 product feeding, one-time gluing and step-by-step multi-time pressing 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] The invention relates to the technical field of automobile manufacturing tooling, in particular to a secondary pressing tooling in a polyurethane rubber mold. Background Art

[0002] With the promotion and application of new energy vehicles, range anxiety is particularly prominent. Lightweighting of vehicles is an important way to increase mileage. Replacing steel with plastic can reduce weight by 10% to 30%. Replacing metal back doors with plastic back doors is one of the application scenarios.

[0003] The inner and outer panels of the plastic back door are bonded by polyurethane glue. The pressing tool is an important tool in the bonding process. Its quality directly affects the size, appearance, performance and production efficiency of the product. The polyurethane glue pressing tool is to press the inner and outer panels together by a robot or a press after the product is coated with glue. Usually, there are several outer panel products to be bonded, and the pressing is done several times. This will take a long time, require more auxiliary time, and have lower production efficiency. At the same time, the investment in equipment production lines is high, and quality assurance is more difficult. For example, one more pressing process will result in one more mold opening and closing action. It takes about 30 seconds for the robot to dock and transfer once. One mold opening and closing process increases the production cycle by about 60 seconds. At the same time, adding a set of upper mold pressing tooling or a complete set of pressing tooling will cost about 300,000 yuan. If the process conditions do not allow the addition of a production line, the fixed investment cost will rise sharply, and the fixed investment cost will be nearly 10 million yuan. Summary of the invention

[0004] The purpose of the present invention is to provide a secondary pressing tool in a polyurethane rubber mold to solve the problems of low efficiency and high cost investment when the existing equipment operates on a door panel that needs to be pressed multiple times.

[0005] The present invention is achieved through the following technical scheme: a secondary pressing tool in a polyurethane rubber mold, comprising a robot quick-change plate assembly, a glue coating tube, an upper mold group, a lower mold group, and a snap-on pressing assembly for fixing the upper mold group and the lower mold group; the robot quick-change plate assembly is used to carry the upper mold group; the glue coating tube is used to apply polyurethane glue at the polyurethane glue position A on the upper outer panel of the product and the polyurethane glue position B on the middle and lower outer panels of the product respectively; the upper mold group comprises an upper mold fixing frame, an upper mold fixing plate is installed on the upper mold fixing frame, a middle and lower outer panel profile block assembly is installed on the upper mold fixing plate, a cylinder assembly is installed on the upper mold fixing frame, and the cylinder assembly comprises a cylinder bracket , a cylinder, and an upper outer panel profile block fixing plate, the output end of the cylinder is connected to the upper outer panel profile block fixing plate, an upper outer panel profile block assembly is installed on the upper outer panel profile block fixing plate, the upper outer panel profile block assembly and the middle and lower outer panel profile block assembly are both provided with suction cup assemblies, the upper outer panel profile block assembly is used to support the upper outer panel of the product, and the middle and lower outer panel profile block assembly is used to support the middle and lower outer panels of the product; the lower mold assembly includes a lower mold fixing plate, an inner panel profile block A assembly and an inner panel profile block B assembly are installed on the lower mold fixing plate, the inner panel profile block A assembly and the inner panel profile block B assembly are both used to support the inner panel of the product, and the inner panel profile block B assembly is provided with a suction cup assembly.

[0006] In order to better realize the present invention, further, the cylinder bracket 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] In order to better realize the present invention, it further includes a reinforcing bracket, which includes a guide column fixing plate and multiple guide columns, the guide columns are slidably connected to the cylinder fixing plate, the guide column fixing plate is connected to the guide columns, and the guide columns are connected to the upper outer plate profile block fixing plate.

[0008] In order to better realize the present invention, 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 combination position of the upper mold group and the lower mold group.

[0009] In order to better realize the present invention, further, the snap-fitting and clamping assembly includes upper and lower mold clamping cylinders, which are installed on the lower mold fixing plate, and pressure plates are installed on the output ends of the upper and lower mold clamping cylinders. When the upper and lower mold clamping cylinders shrink, the pressure plate squeezes the upper mold fixing frame to achieve the snap-fitting and clamping of the upper mold group and the lower mold group.

[0010] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention optimizes the structure of the pressing tooling to achieve one-time loading, one-time gluing, and multiple-step pressing inside the pressing tooling, thereby shortening the process flow; the production cycle of docking and transfer is shortened from the traditional 140 seconds to about 60 seconds, greatly shortening the auxiliary time and improving production efficiency; on the other hand, it also saves about 300,000 yuan in fixed investment costs compared with the traditional solution, and at the same time improves the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is a sectional view of the local structure of the present invention in the mold closing state.

[0013] Figure 3 It is a sectional view of the local structure of the present invention in the mold opening state.

[0014] Figure 4 It is a cross-sectional view of the structure of the pressing position in the mold closing state.

[0015] Figure 5 This is a cross-sectional view of the gluing position structure in the mold opening state.

[0016] Among them: 1-upper outer panel of the product; 2-middle and lower outer panels of the product; 3-inner panel of the product; 4-polyurethane glue position A; 5-polyurethane glue position B; 6-upper outer panel profile block assembly; 7-inner panel profile block A assembly; 8-middle and lower outer panel profile block assembly; 9-suction cup assembly; 10-upper outer panel profile 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 profile 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 coating tube. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection 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.

[0019] Embodiment 1: This embodiment provides a polyurethane rubber mold secondary pressing tooling, specifically as follows Figure 1-Figure 5 As shown, it includes a robot quick-change disc assembly 22, a glue coating tube 23, an upper mold group, a lower mold group, and a snap-fitting and clamping assembly for fixing the upper mold group and the lower mold group; the robot quick-change disc assembly 22 is used to carry the upper mold group; the glue coating tube 23 is used to apply polyurethane glue at the polyurethane glue position A4 on the upper outer panel 1 of the product and the polyurethane glue position B5 on the lower outer panel 2 of the product.

[0020] The upper mold group 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 panel profile 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, an upper outer panel profile block fixing plate 10, the output end of the cylinder 13 is connected to the upper outer panel profile block fixing plate 10, an upper outer panel profile block assembly 6 is installed on the upper outer panel profile block fixing plate 10, the upper outer panel profile block assembly 6 and the middle and lower outer panel profile block assembly 8 are both provided with a suction cup assembly 9, the upper outer panel profile block assembly 6 is used to support the upper outer panel 1 of the product, and the middle and lower outer panel profile block assembly 8 is used to support the middle and lower outer panel 2 of the product.

[0021] The lower mold assembly includes a lower mold fixing plate 18, on which an inner panel profile block A component 7 and an inner panel profile block B component 19 are installed. The inner panel profile block A component 7 and the inner panel profile block B component 19 are both used to support the product inner panel 3, and a suction cup component 9 is provided on the inner panel profile block B component 19.

[0022] After the robot quick-change plate assembly 22 carries the upper die set to the manual loading station, the staff installs the upper outer panel 1 of the product on the upper outer panel profile block assembly 6, and the corresponding suction cup assembly 9 sucks the upper outer panel 1 of the product; then installs the middle and lower outer panel 2 of the product on the middle and lower outer panel profile block assembly 8, and the corresponding suction cup assembly 9 sucks the middle and lower outer panel 2 of the product; at the same time, the inner panel 3 of the product is also installed on the inner panel profile block A assembly 7 and the inner panel profile block B assembly 19, and the corresponding suction cup assembly 9 sucks the inner panel 3 of the product. After the staff completely installs the upper outer panel 1 of the product, the middle and lower outer panel 2 of the product, and the inner panel 3 of the product, the robot quick-change plate assembly 22 carries the upper die set to the gluing station, and at this time, the robot arm controls the gluing tube 23 to first apply the polyurethane glue at the glue position B5, and then tilts at an angle and applies the polyurethane glue at the glue position A4. After the glue coating is completed, the cylinder 13 is started. Under the extension of the cylinder 13, the upper outer panel profile block fixing plate 10 will push the upper outer panel profile block assembly 6 to drive the upper outer panel 1 of the product to move, so that the upper outer panel 1 of the product and the middle and lower outer panel 2 of the product begin to approach and slightly squeeze the polyurethane glue at the polyurethane glue position A4; then the robot quick change plate assembly 22 moves the upper mold assembly to the top of the lower mold assembly and starts the mold closing operation. At this time, under the support of the inner panel profile block A assembly 7, the middle and lower outer panel 2 of the product and the inner panel 3 of the product begin to squeeze the polyurethane glue at the polyurethane glue position B5; at this time, the cylinder 13 is further extended. Under the extension of the cylinder 13, the upper outer panel 1 of the product and the middle and lower outer panel 2 of the product also begin to further squeeze the polyurethane glue at the polyurethane glue position A4. At the same time, the middle and lower outer panel 2 of the product will also strengthen the squeezing of the inner panel 3 of the product after being pressed, so as to realize the secondary pressing of the upper outer panel 1 of the product, the middle and lower outer panel 2 of the product, and the inner panel 3 of the product in the mold. At this time, the buckling and pressing assembly starts to buckle the upper and lower molds, maintaining the clamping force of the mold, and the product enters the initial pressing stage. After the initial consolidation is completed, the buckling and pressing assembly is removed, and at the same time, the cylinder 13 pulls the upper outer panel profile block assembly 6 back to the gluing position through the upper outer panel profile block fixing plate 10, and then the robot quick change plate assembly 22 grabs the upper mold to open the mold, and moves the upper mold to the manual loading station for the next cycle.

[0023] Through the above arrangement, the upper outer panel profile block assembly 6 and the middle and lower outer panel profile block assembly 8 of the upper mold assembly are arranged to be relatively movable by using the cylinder assembly, so that when the upper mold assembly and the lower mold assembly are closed, the upper outer panel 1 of the product, the middle and lower outer panel 2 of the product, and the inner panel 3 of the product are pressed in the mold for the second time, thereby improving the pressing and adhesion effect of the polyurethane glue; at the same time, since the upper outer panel profile block assembly 6 and the middle and lower outer panel profile block assembly 8 are separated by a certain distance when applying the glue, the robot arm only needs to control the deflection of the glue application tube 23 when applying the polyurethane glue at the glue position A4 and the glue position B5, that is, The robot arm completes the gluing operation at polyurethane glue position A4 and polyurethane glue position B5 in the same posture, saving about 10 seconds of robot arm posture adjustment time; when the upper mold group and the lower mold are combined, the upper outer panel 1 of the product, the middle and lower outer panel 2 of the product, and the inner panel 3 of the product can simultaneously complete the secondary pressing in the mold, thereby saving about 30 seconds of posture adjustment and secondary pressing time for the robot quick-change disc assembly 22; the mold opening process of the upper outer panel 1 of the product is carried out simultaneously with the mold opening process of the upper mold group and the lower mold group, saving about 40 seconds of secondary docking and mold opening auxiliary time for the robot quick-change disc assembly 22. In summary, this solution can shorten the process flow, reduce the auxiliary time of equipment tooling by nearly 80 seconds in total, greatly improve production efficiency, and reduce tooling investment by nearly 300,000.

[0024] Embodiment 2: This embodiment further expands the cylinder bracket on the basis of the above embodiment. Figure 1-Figure 3 As shown, the cylinder bracket includes a cylinder fixing plate 15 and a plurality of 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, and the cylinder 13 is installed on the cylinder fixing plate 15.

[0025] The cylinder fixing plate 15 is provided to ensure the stability of the installation and operation of the cylinder 13; at the same time, the moving stroke of the reserved upper outer plate profile block assembly 6 is increased to facilitate the application of polyurethane glue at the polyurethane glue positions A4 and B5.

[0026] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0027] Embodiment 3: This embodiment is further expanded on the basis of Embodiment 2. Figure 1-Figure 3 As shown, it also includes a reinforcing bracket, which includes a guide column fixing plate 14 and multiple guide columns 11. The guide columns 11 are slidably connected to the cylinder fixing plate 15. The guide column fixing plate 14 is connected to the guide columns 11, and the guide columns 11 are connected to the upper outer plate profile block fixing plate 10.

[0028] By setting up a reinforcing bracket, the upper outer panel profile block fixing plate 10 can make the upper outer panel profile block assembly 6 move more stably, thereby preventing the upper outer panel profile block assembly 6 from being offset during secondary pressing in the mold, thereby improving the pressing quality; at the same time, the torque of the offset of the upper outer panel profile block assembly 6 is transferred from the output end of the cylinder 13 to the guide column 11, thereby preventing the output end of the cylinder 13 from being deformed.

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

[0030] Embodiment 4: This embodiment is further expanded on the basis of the above embodiment. 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.

[0031] When the upper die set and the lower die set are assembled, the guide pin is inserted into the guide groove to correct the combined position of the upper die set and the lower die set, thereby improving the assembly accuracy of the upper die set and the lower die set, thereby improving the pressing quality.

[0032] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0033] Embodiment 5: This embodiment further expands the buckling and pressing components on the basis of the above embodiments. Figure 1 As shown, the snap-fitting and clamping assembly includes an upper and lower mold clamping cylinder 21, which is installed on the lower mold fixing plate 18. A pressure plate is installed at the output end of the upper and lower mold clamping cylinder 21. When the upper and lower mold clamping cylinders 21 contract, the pressure plate squeezes the upper mold fixing frame 16 to achieve the snap-fitting and clamping of the upper mold group and the lower mold group.

[0034] By providing a buckling and pressing assembly, the upper die set and the lower die set can be kept in a buckling state of the press machine to maintain the stability of the pressing, while freeing up the robot quick-change plate assembly 22 to reduce power consumption.

[0035] The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A secondary pressing tool in a polyurethane rubber mold, characterized in that: It comprises a robot quick-change plate assembly (22), a glue coating tube (23), an upper die set, a lower die set, and a snap-fit ​​pressing assembly for fixing the upper die set and the lower die set; the robot quick-change plate assembly (22) is used to carry the upper die set; the glue coating tube (23) is used to apply polyurethane glue at a polyurethane glue position A (4) on the upper outer panel (1) of the product and at a polyurethane glue position B (5) on the middle and lower outer panel (2) of the product; The upper die assembly comprises an upper die fixing frame (16), an upper die fixing plate (17) is mounted on the upper die fixing frame (16), a middle and lower outer plate profile block assembly (8) is mounted on the upper die fixing plate (17), a cylinder assembly is mounted on the upper die fixing frame (16), the cylinder assembly comprises a cylinder bracket, a cylinder (13), and an upper outer plate profile block fixing plate (10), an output end of the cylinder (13) is connected to the upper outer plate profile block fixing plate (10), an upper outer plate profile block assembly (6) is mounted on the upper outer plate profile block fixing plate (10), a suction cup assembly (9) is provided on the upper outer plate profile block assembly (6) and the middle and lower outer plate profile block assembly (8), the upper outer plate profile block assembly (6) is used to support the upper outer plate (1) of the product, and the middle and lower outer plate profile block assembly (8) is used to support the middle and lower outer plate (2) of the product; The lower die assembly comprises a lower die fixing plate (18), on which an inner plate profile block A component (7) and an inner plate profile block B component (19) are mounted, the inner plate profile block A component (7) and the inner plate profile block B component (19) both being used to support the inner plate (3) of the product, and a suction cup component (9) being arranged on the inner plate profile block B component (19).

2. The polyurethane rubber mold secondary pressing tool according to claim 1, characterized in that: The cylinder bracket comprises a cylinder fixing plate (15) and a plurality of upper outer plate cylinder fixing plate support columns (12), the upper outer plate cylinder fixing plate support columns (12) being mounted on an upper mold fixing frame (16), the cylinder fixing plate (15) being mounted on the upper outer plate cylinder fixing plate support columns (12), and the cylinder (13) being mounted on the cylinder fixing plate (15).

3. The polyurethane rubber mold secondary pressing tool according to claim 2, characterized in that: It also includes a reinforcing bracket, the reinforcing bracket including a guide column fixing plate (14) and a plurality of guide columns (11), the guide columns (11) being slidably connected to the cylinder fixing plate (15), the guide column fixing plate (14) being connected to the guide columns (11), and the guide columns (11) being connected to the upper outer plate profile block fixing plate (10).

4. The polyurethane rubber mold secondary pressing tool according to claim 1, characterized in that: It also includes an upper and lower die positioning mechanism (20), the upper and lower die positioning mechanism (20) including a guide pin and a guide groove, the guide groove being in a "U" shape, the guide pin being mounted on the upper die fixing frame (16), the guide groove being mounted on the lower die fixing plate (18), the guide pin being inserted into the guide groove to correct the positions of the upper die assembly and the lower die assembly.

5. The polyurethane rubber mold secondary pressing tool according to claim 1, characterized in that: The buckling and pressing assembly comprises an upper and lower die pressing cylinder (21), the upper and lower die pressing cylinder (21) being mounted on a lower die fixing plate (18), and a pressing plate being mounted on the output end of the upper and lower die pressing cylinder (21). When the upper and lower die pressing cylinder (21) contracts, the pressing plate squeezes the upper die fixing frame (16) to achieve buckling and pressing of the upper die assembly and the lower die assembly.

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