Automatic positioning device for fixing polyurethane product pouring mold

Abstract

The utility model discloses an automatic positioning device for fixing a polyurethane product pouring mold, which comprises a fixing mechanism and a jacking mechanism, the fixing mechanism comprises a fixing table provided with a lower mold mounting area, a pressing fixing block provided with an upper mold mounting area, and a pressing driving module, the pressing driving module is connected with the pressing fixing block and used for driving the pressing fixing block to conduct mold closing and locking operation in the direction of the lower mold mounting area, the jacking mechanism comprises a jacking plate, an inflation piece arranged on the fixing table and a jacking driving piece, and the inflation piece is located below the jacking plate; the jacking driving piece is connected with the inflation piece and used for driving the inflation piece to conduct jacking and pressurizing operation in the direction of the jacking plate, and the jacking plate is used for conducting jacking in the direction of the lower die installation area. According to the utility model, the fixing mechanism is matched with the jacking mechanism, and the jacking mechanism jacks a mould locked on the fixing mechanism in the foaming process through the synergistic effect of the jacking plate, the inflating piece and the jacking driving piece, so that the sealing of a mould closing surface in the foaming process is kept.

Description

An automatic positioning device for fixing polyurethane product casting molds Technical Field

[0001] This utility model relates to the technical field of foaming production equipment, and in particular to an automatic positioning device for fixing polyurethane product casting molds. Background Technology

[0002] When producing synthetic polyurethane products, after polyurethane components A and B are injected into the mold, physical and chemical reactions occur between them, causing the mixed volume to increase rapidly and generating a large expansion force. During the foaming process, the mold is positioned and locked by a fixed locking device for mold closing and foaming. If the pressure applied by the mold locking is unevenly transmitted to the mold parting surface through the template, or if the internal pressure of the foaming material exceeds the mold locking force, the gap between the mold parting surfaces will widen, that is, a gap will be generated between the upper and lower molds. The foaming material can easily overflow from this gap, resulting in unqualified products. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic positioning device for fixing polyurethane product casting molds, which has a clamping mechanism to maintain the sealing of the mold closing surface during the foaming process. This improves the problem of material overflow due to gaps in the mold closing surface and enhances the quality of the product.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An automatic positioning device for fixing a polyurethane product casting mold includes a fixing mechanism and a clamping mechanism. The fixing mechanism includes a fixing platform, a clamping block, and a clamping drive module. A lower mold mounting area is provided on the fixing platform, and an upper mold mounting area is provided on the clamping block. The clamping drive module is connected to the clamping block and is used to drive the clamping block towards the lower mold mounting area for mold closing and locking. The clamping mechanism includes a lifting plate, an inflatable component, and a lifting drive component. The inflatable component is disposed on the fixing platform and is located below the lifting plate. The inflatable component is connected to the lifting drive component and is used to drive the inflatable component towards the lifting plate for lifting and pressurizing. The lifting plate is used to clamp towards the lower mold mounting area.

[0006] In one embodiment, the clamping drive module includes a support frame, an opening and closing frame, and a locking frame. The support frame is connected to the fixed platform. One end of the opening and closing frame is hinged to the support frame, and the other end of the opening and closing frame is hinged to the locking frame. The clamping fixing block is disposed on the opening and closing frame and is located between the support frame and the locking frame. When the opening and closing frame rotates relative to the support frame, it drives the clamping fixing block to move closer to or further away from the lower mold mounting area. When the locking frame rotates relative to the opening and closing frame, it is used to perform locking or unlocking operations with the fixed platform.

[0007] In one embodiment, a snap-fit ​​bracket is provided on the fixing platform, and when the locking bracket is locked to the fixing platform, the locking bracket engages and locks with the snap-fit ​​bracket.

[0008] In one embodiment, the locking frame includes a locking hinge portion and a locking latch portion. The locking hinge portion is hinged to the opening and closing frame. The locking latch portion has a latching hook groove on one end facing the latching frame. The latching hook groove engages and locks with the latching frame.

[0009] In one embodiment, two locking frames are provided, and the two locking frames are arranged in parallel.

[0010] In one embodiment, two clamping blocks are provided, and the two clamping blocks are spaced apart on the opening and closing frame.

[0011] In one embodiment, the opening and closing frame is provided with an adjustment groove, and the clamping and fixing block is connected to the adjustment groove by bolt fasteners.

[0012] In one embodiment, the lifting drive includes an inflatable support plate disposed on a fixed platform, the inflatable support plate being located below the inflatable component, and an inflation channel being provided on the inflatable support plate, the inflation channel being connected to the inflatable component.

[0013] In one embodiment, the inflatable support plate is smaller than the inflatable component, and the inflatable support plate has several concave notches on both opposite sides.

[0014] In one embodiment, two inflatable components are provided, and the two inflatable components are located below opposite sides of the lifting plate.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] 1. The automatic positioning device for fixing polyurethane product casting molds of this utility model, through the cooperation of a fixing mechanism and a clamping mechanism, positions and installs the mold in the upper mold mounting area and lower mold mounting area on the fixing mechanism. Then, the clamping drive module drives the clamping fixing block to perform a mold closing and locking operation in the direction of the lower mold mounting area. The clamping mechanism, through the synergistic action of the lifting plate, the air inflator and the lifting drive, clamps the mold during the foaming process, forming a dynamic sealing system. Thus, during the foaming process, the fixing mechanism and the clamping mechanism together form a force structure that applies downward pressure and upward lifting to the mold, so that the mold installed on the fixing mechanism can maintain a stable and continuous seal on the mold closing surface during the foaming process.

[0017] 2. The automatic positioning device for fixing polyurethane product casting molds of this utility model can further guide the deformation and stress dispersion of the inflatable parts through the size and concave notch design of the inflatable support plate, so that the inflatable parts deform towards the lifting plate and expand evenly as a whole, thereby applying more uniform pressure to the lifting plate and avoiding excessive local pressure from affecting the mold closing surface to effectively maintain the seal. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0019] Figure 1 is a schematic diagram of the structure of an automatic positioning device for fixing a polyurethane product casting mold in one embodiment of the present invention.

[0020] Figure 2 is a schematic diagram of the opening and closing frame and locking frame structure in a specific embodiment of this utility model;

[0021] Figure 3 is a schematic diagram of the clamping drive component structure in another specific embodiment of this utility model. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to the accompanying drawings. Referring to Figure 1, an automatic positioning device for fixing a polyurethane product casting mold is provided. This device includes a fixing mechanism 100 and a clamping mechanism 200. The fixing mechanism 100 includes a fixing platform 110, a clamping fixing block 120, and a clamping drive module 130. The fixing platform 110 has a lower mold mounting area, and the clamping fixing block 120 has an upper mold mounting area. The clamping drive module 130 is connected to the clamping fixing block 120 and is used to drive the clamping fixing block 120 towards... The mold closing and locking operation is performed in the direction of the lower mold installation area. The clamping mechanism 200 includes a lifting plate 210, an inflatable component 220 and a lifting drive component 230. The inflatable component 220 is set on the fixed platform 110 and is located below the lifting plate 210. The inflatable component 220 is connected to the lifting drive component 230. The lifting drive component 230 is used to drive the inflatable component 220 to lift and pressurize in the direction of the lifting plate 210. The lifting plate 210 is used to clamp in the direction of the lower mold installation area.

[0023] It should be noted that in the initial state of the automatic positioning device for fixing the polyurethane product casting mold, the lower mold mounting area on the fixing platform 110 is empty and is used for subsequent installation of the lower mold. The clamping drive module 130 is in the initial lifting position. The upper mold mounting area of ​​the clamping fixing block 120 is not installed with the upper mold and maintains the maximum distance of the mold closing stroke with the lower mold mounting area. The clamping drive module 130 is in an unpressurized state and does not apply force to the clamping fixing block 120. The inflation component 220 is in an uninflated state and the lifting drive component 230 is in an unlifted state.

[0024] Furthermore, the clamping drive module 130 is connected to an external drive such as a hydraulic cylinder or a pneumatic cylinder to automate the clamping fixing block 120 in the direction of the lower mold mounting area for mold closing and locking operations.

[0025] In use, the lower mold is installed in the lower mold mounting area of ​​the fixed platform 110, ensuring accurate positioning. Then, the upper mold is installed in the upper mold mounting area of ​​the clamping block 120. The alignment accuracy of the upper and lower molds is checked. Next, the external drive, with a set pressure and closing speed, pushes the clamping drive module 130 to move the upper mold mounted on the clamping block 120 to the lower mold mounted in the lower mold mounting area until the mold closing surfaces are completely fitted. During the mold closing process, multiple pressure control levels can be set to pressurize the clamping block 120. Initially, a low-pressure stage is used for slow closing to avoid rapid mold closing and strong impact. Once the molds are in contact, the system switches to a preset high-pressure stage, and the clamping drive module 130 continues to apply force to the clamping block 120, causing the mold closing surfaces to completely fit together. The mold closing force of the upper and lower molds increases gradually. When the mold closing force reaches a preset threshold, the clamping drive module 130 locks with the fixed platform 110 to ensure a tight seal. The mold closing and locking operation is then complete. Furthermore, a pressure sensor can be used to monitor the clamping force during the foaming process in real time. If a decrease in the clamping force is detected, the pressure will be automatically compensated to the set value.

[0026] When foaming occurs in the mold-closed and locked state, the foaming material is confined within the closed space of the mold. When the foaming agent releases gas, the gas cannot escape freely, causing the pressure inside the bubble to rise rapidly. This exerts a huge force on the mold wall, making gaps easily appear on the mold-closing surface, especially at the edges, leading to the overflow of the foaming material and affecting the quality of the product obtained after foaming. The clamping mechanism 200 in this device forms a dynamic sealing system during the foaming process through the coordinated action of the lifting plate 210, the inflation component 220, and the lifting drive component 230. During the foaming process, the internal expansion force of the mold increases, while the mold is continuously subjected to pressure applied by the compression drive module 130. The force exerted by the internal expansion force on the mold wall is transmitted towards the lower mold mounting area and the edge of the mold closing surface. The lifting plate 210 and the inflator 220 located below the lifting plate 210 are compressed. The lifting drive module 230 supports the inflator 220 and connects to it for inflation, causing the inflator 220 to rise and pressurize towards the lifting plate 210. The lifting plate 210 then presses against the lower mold mounting area, ensuring that the mold closing surface remains sealed during the foaming process. After foaming is completed, the inflator 220 is depressurized, the lifting plate 210 returns to its initial position, and the compression drive module 130 unlocks from the fixed platform 110, allowing for smooth separation of the mold.

[0027] This utility model discloses an automatic positioning device for fixing polyurethane product casting molds. Through the cooperation of the fixing mechanism 100 and the clamping mechanism 200, after the upper mold mounting area and lower mold mounting area on the fixing mechanism 100 are positioned and installed, the clamping drive module 130 drives the clamping fixing block 120 to perform a mold closing and locking operation in the direction of the lower mold mounting area. During the mold closing and locking, the clamping mechanism 200, through the coordinated action of the lifting plate 210, the air inflator 220 and the lifting drive component 230, clamps the mold during the foaming process, forming a dynamic sealing system. Thus, during the foaming process, the fixing mechanism 100 and the clamping mechanism 200 together form a force-applying structure that presses down and pushes up on the mold, so that the mold installed on the fixing mechanism 100 keeps the mold closing surface sealed during the foaming process.

[0028] In this embodiment, the lifting plate 210 also serves as a component that directly contacts the mold. The inflatable component 220 expands under the drive of the lifting drive component 230, pushing the lifting plate 210 to adhere tightly to the surface of the lower mold during the foaming process and to press the mold firmly, preventing gaps from forming on the mold closing surface and causing the foaming material to overflow.

[0029] It is understandable that the aforementioned inflatable component 220 can be an airbag or a hydraulic bladder.

[0030] Understandably, the lifting drive 230 can be connected to an external controller to monitor the pressure on the inflation component 220 in real time and automatically adjust the stroke to prevent excessive compression.

[0031] In a specific implementation, referring to Figures 1 and 2, the clamping drive module 130 includes a support frame 131, an opening and closing frame 132, and a locking frame 133. The support frame 131 is connected to the fixed platform 110. One end of the opening and closing frame 132 is hinged to the support frame 131, and the other end of the opening and closing frame 132 is hinged to the locking frame 133. The clamping fixing block 120 is disposed on the opening and closing frame 132, and the clamping fixing block 120 is located between the support frame 131 and the locking frame 133. When the opening and closing frame 132 rotates relative to the support frame 131, it is used to drive the clamping fixing block 120 to move closer to or further away from the downward mold installation area. When the locking frame 133 rotates relative to the opening and closing frame 132, it is used to perform locking or unlocking operations with the fixed platform 110.

[0032] Understandably, the opening and closing frame 132 and the locking frame 133 are respectively connected to external drives. Under the external drive, the opening and closing frame 132 rotates relative to the support frame 131. During the mold closing and locking operation, the opening and closing frame 132 drives the pressing and fixing block 120 and the upper mold installed on it to move closer to the lower mold installation area. The locking frame 133 rotates relative to the opening and closing frame 132 in a direction away from the fixed platform 110 to avoid collision with the fixed platform 110. This continues until the upper mold and the lower mold installed on the lower mold installation area are in contact, and the mold closing force reaches the set threshold. Then, the locking frame 133 rotates in a direction closer to the fixed platform 110 and locks with the fixed platform 110. After foaming is completed, the locking frame 133 rotates relative to the opening and closing frame 132 to unlock from the fixed platform 110. The opening and closing frame 132 drives the pressing and fixing block 120 and the upper mold installed on it to move away from the lower mold installation area, and the mold separates.

[0033] In this specific implementation, the hinged connection method at both ends of the opening and closing frame 132 is as follows: one end of the opening and closing frame 132 is provided with a hinged part, and the other end is provided with a support ear. The hinged part is hinged to the support frame 131, and the locking frame 133 is hinged to the support ear.

[0034] Furthermore, the opening and closing frame 132 can be provided with multiple hinge positions to the support frame 131, so that the opening and closing frame 132 can adjust the closing height of different molds by connecting with different hinge positions of the support frame 131.

[0035] It should be noted that the locking frame 133 and the fixed platform 110 can be locked together by means of mechanical buckle, hydraulic self-locking or magnetic adsorption to maintain the mold's closed state.

[0036] In this specific implementation, a mechanical snap-fit ​​structure is adopted. A snap-fit ​​bracket 111 is set on the fixed platform 110. When the locking bracket 133 is locked to the fixed platform 110, the locking bracket 133 and the snap-fit ​​bracket 111 are engaged and locked. Specifically, the locking bracket 133 is provided with a locking hinge part and a locking snap-fit ​​part. The locking hinge part is hinged to the lug on the opening and closing frame 132. The locking snap-fit ​​part has a snap-fit ​​hook groove 133a on the end facing the snap-fit ​​bracket 111. The snap-fit ​​hook groove 133a is engaged and locked with the snap-fit ​​bracket 111. That is, when the mold closing force reaches the set threshold, the locking snap-fit ​​part of the locking bracket 133 rotates toward the snap-fit ​​bracket 111. After rotating to the position, the snap-fit ​​hook groove 133a hooks onto the snap-fit ​​bracket 110 for locking. When unlocking is required after foaming, the snap-fit ​​hook groove 133a disengages from the snap-fit ​​bracket 110 for unlocking.

[0037] To better maintain the mold's closed and locked state, ensuring molding quality and safety, two locking brackets 133 are installed, arranged in parallel. The two parallel locking brackets 133 can distribute the load, reducing the force on each bracket and preventing deformation caused by single-point stress. This results in a more stable structure and increased stability of the mold's closing and locking. When the mold is large, the parallel design may facilitate operation, such as locking from both sides simultaneously. The two locking brackets can cover a wider area, reducing the risk of warping or misalignment. Furthermore, if one locking bracket 133 malfunctions, the other can still function, improving reliability.

[0038] Furthermore, two clamping and fixing blocks 120 are provided, spaced apart on the opening and closing frame 132. In this specific embodiment, the clamping and fixing blocks 120 serve two purposes: firstly, to fix the upper mold, and secondly, during the mold closing and locking operation, to apply pressure to the mold after it is closed, as the clamping drive module 130 applies pressure. With two clamping and fixing blocks 120 positioned at different locations on the opening and closing frame 132, when the frame closes towards the lower mold mounting area, the two clamping and fixing blocks 120 clamp different positions on the mold, applying force to multiple points and increasing the contact area between the mold and the clamping blocks. This improves the overall stability of the device and reduces vibration or displacement. During the foaming molding process, the mold experiences internal stress due to the expansion and pressure of the foamed material. The two clamping and fixing blocks 120 can balance these stresses, reducing the risk of mold warping.

[0039] To accommodate molds of different sizes, the opening and closing frame 132 is provided with an adjustment groove 132a. Two clamping and fixing blocks 120 are connected to the adjustment groove 132a by bolt fasteners. In this way, the position of the two clamping and fixing blocks 120 can be adjusted according to the mold of different sizes for mold alignment and installation. At the same time, it can also better balance the internal stress of different molds and improve the flexibility of the device application.

[0040] In another specific implementation, the lifting drive component 230 includes an inflatable support plate 231, which is disposed on the fixed platform 110 and located below the inflatable component 220. An inflation channel 231a is provided on the inflatable support plate 231, and the inflation channel 231a is connected to the inflatable component 220.

[0041] It should be noted that during the foaming process, the internal expansion force of the mold increases, and the expansion force exerts a force on the inner wall of the mold. The lifting plate 210 and the inflatable component 220 located below the lifting plate 210 are compressed. The lifting drive component 230 inflates the inflatable component 220 through the inflation channel 231a of the inflation support plate 231 according to the pressure on the inflatable component 220. Due to the support of the inflation support plate 231, the inflatable component 220 is kept in the direction of the lifting plate 210 for lifting and pressurization, which has a guiding effect on the deformation of the inflatable component 220, keeping the inflatable component 220 expanding in the direction of the lifting plate 210. The lifting plate 210 then presses against the lower mold mounting area, so that the mold closing surface remains sealed during the foaming process.

[0042] In this specific implementation, the outer dimensions of the inflatable support plate 231 are smaller than those of the inflatable component 220, and several concave notches 231b are provided on both opposite sides of the inflatable support plate 231. Referring to Figures 1 and 3, the outer dimensions of the support plate are smaller than those of the inflatable component 220, and support gaps are left at both ends of the inflatable component 220, allowing the inflatable component 220 to have greater freedom when inflating. When the inflatable component 220 inflates, the area not covered by the inflatable support plate 231 can have greater deformation space. The inflatable support plate 231 only restricts the deformation of a part of the inflatable component 220, and the unsupported area of ​​the inflatable component 220 is not constrained by the inflatable support plate 231, reducing the restriction on the overall deformation of the inflatable component 220 and avoiding excessive constraint that could lead to stress concentration or breakage of the inflatable component 220. The inflatable support plate 231 has several concave notches 231b on both opposite sides. When the inflatable component 220 expands and deforms, it is supported and constrained on both sides of the inflatable support plate 231, while a buffer structure is formed at the concave notches 231b. This allows the inflatable component 220 to expand upwards and uniformly as a whole, avoiding shape deviation caused by instantaneous disorderly expansion. The deformation is more controllable. After the inflatable component 220 deforms, it applies more uniform pressure to the lifting plate 210 for lifting.

[0043] Furthermore, two inflatable components 220 are provided, which are located on opposite sides below the lifting plate 210. The two inflatable components 220 apply a uniform lifting force to the lifting plate 210 from both sides, avoiding the lifting plate 210 from tilting due to force on one side, making the mold lifting more stable, and the pressure distribution between the lifting plate 210 and the mold contact surface more uniform, avoiding excessive local pressure that may affect the effective sealing of the mold closing surface.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic positioning device for fixing polyurethane product casting molds, characterized in that, include: The system includes a fixing mechanism and a clamping mechanism. The fixing mechanism comprises a fixing platform, a clamping block, and a clamping drive module. The fixing platform has a lower mold mounting area, and the clamping block has an upper mold mounting area. The clamping drive module is connected to the clamping block and is used to drive the clamping block towards the lower mold mounting area for mold closing and locking. The clamping mechanism comprises a lifting plate, an inflatable component, and a lifting drive component. The inflatable component is disposed on the fixing platform and is located below the lifting plate. The inflatable component is connected to the lifting drive component and is used to drive the inflatable component towards the lifting plate for lifting and pressurizing. The lifting plate is used to clamp towards the lower mold mounting area.

2. The automatic positioning device for fixing polyurethane product casting molds according to claim 1, characterized in that, The clamping drive module includes a support frame, an opening and closing frame, and a locking frame. The support frame is connected to the fixed platform. One end of the opening and closing frame is hinged to the support frame, and the other end of the opening and closing frame is hinged to the locking frame. The clamping fixing block is disposed on the opening and closing frame and is located between the support frame and the locking frame. When the opening and closing frame rotates relative to the support frame, it is used to drive the clamping fixing block to move closer to or further away from the lower mold mounting area. When the locking frame rotates relative to the opening and closing frame, it is used to perform locking or unlocking operations with the fixed platform.

3. The automatic positioning device for fixing polyurethane product casting molds according to claim 2, characterized in that, A snap-fit ​​bracket is provided on the fixed platform. When the locking bracket is locked to the fixed platform, the locking bracket engages and locks with the snap-fit ​​bracket.

4. The automatic positioning device for fixing polyurethane product casting molds according to claim 3, characterized in that, The locking frame includes a locking hinge and a locking latch. The locking hinge is hinged to the opening and closing frame. The locking latch is provided with a latching hook groove on one end of the locking frame, and the latching hook groove engages and locks with the locking frame.

5. The automatic positioning device for fixing polyurethane product casting molds according to claim 4, characterized in that, There are two locking brackets, which are arranged in parallel.

6. The automatic positioning device for fixing polyurethane product casting molds according to claim 2, characterized in that, Two clamping and fixing blocks are provided, and the two clamping and fixing blocks are spaced apart on the opening and closing frame.

7. The automatic positioning device for fixing polyurethane product casting molds according to claim 6, characterized in that, The opening and closing frame is provided with an adjustment groove, and the clamping and fixing block is connected to the adjustment groove by bolt fasteners.

8. The automatic positioning device for fixing polyurethane product casting molds according to claim 1, characterized in that, The lifting drive component includes an inflatable support plate, which is mounted on a fixed platform and located below the inflatable component. An inflation channel is provided on the inflatable support plate and communicates with the inflatable component.

9. The automatic positioning device for fixing polyurethane product casting molds according to claim 8, characterized in that, The inflatable support plate is smaller than the inflatable component, and several concave notches are provided on both opposite sides of the inflatable support plate.

10. The automatic positioning device for fixing polyurethane product casting molds according to claim 9, characterized in that, There are two inflatable components, which are located on opposite sides below the lifting plate.

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