A stripper for a press

Abstract

The utility model discloses a kind of unloading devices of pressure forming machine, including the U-shaped base of semi-surrounding fixed in the lower heating platform outside side, the top of the U-shaped base is fixedly installed with multiple supporting plates in the both sides of lower heating platform, first plane, bevel and second plane are sequentially arranged on the supporting plate, the top of the U-shaped base is connected with two electromagnets by linear drive mechanism, the electromagnet is used to drive lower mould and upper mould to move, the end of electromagnet orientation is installed with iron block in lower mould and upper mould;The utility model can be driven by linear drive mechanism cooperation electromagnet adsorption transmission, lower mould and upper mould are synchronously moved to specified position after automatic separation, so that upper mould remains between upper and lower heating platform, lower mould is completely removed to U-shaped base, completely avoid the shielding of upper mould to lower mould pick-up area, provide sufficient operating space for operator, pick-up process is convenient and efficient, substantially reduce product damage and operating safety risk.

Description

Technical Field

[0001] This utility model relates to a material unloading device, specifically a material unloading device for a pressure molding machine. Background Technology

[0002] As a core piece of equipment in pressure molding for processing heat-sensitive materials (such as thermoplastics, composites, and rubber), the thermoforming machine works by heating the lower mold on the lower heating platform and the upper mold on the upper heating platform, combined with a pressurizing mechanism to close the molds, allowing the material to be molded under high temperature and high pressure. After molding, the unloading process is a crucial step connecting "molding-part removal-next cycle," and its efficiency, safety, and ease of operation directly determine the overall production efficiency of the thermoforming machine.

[0003] However, the unloading mechanism of existing thermoforming machines has many shortcomings: First, the traditional unloading method mostly involves manually moving the upper and lower molds out of the machine body at the same time, and then manually opening the upper mold upwards. However, the part-retrieving area of ​​the lower mold is still partially blocked by the upper mold, resulting in a narrow space for the operator to retrieve the part, making the operation cumbersome and time-consuming. Second, some thermoforming machines use an unloading device to pull the mold out of the machine body and use cylinders to support the upper mold to provide sufficient operating space between the upper and lower molds. However, in order to move the upper mold upwards to a sufficient height, the vertical volume of the unloading device is large, and it occupies a lot of vertical space.

[0004] Therefore, there is an urgent need for a reasonable unloading device that is convenient to unload materials. Utility Model Content

[0005] The purpose of this invention is to provide a discharge device for a pressure molding machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A discharge device for a pressure molding machine includes a U-shaped base that is semi-enclosed and fixed to the outside of a lower heating platform. Multiple support plates are fixedly installed on both sides of the top of the U-shaped base on the lower heating platform. A first plane, an inclined plane, and a second plane are sequentially arranged on the support plates. Two electromagnets are connected to the top of the U-shaped base via a linear drive mechanism. The electromagnets drive the movement of a lower mold and an upper mold. Iron blocks are installed at the ends of the lower and upper molds facing the electromagnets, with each iron block corresponding to one electromagnet. Support rods are fixedly installed on the outer walls of both sides of the upper mold at corresponding positions on the support plates. Rollers are rotatably mounted on the outer walls of the support rods above the support plates.

[0008] As a further embodiment of this utility model: heat insulation plates are fixedly installed on the outer walls of both the lower mold and the upper mold, the iron block is fixedly installed on the corresponding heat insulation plates, and polytetrafluoroethylene plates are fixedly installed on the outer wall of the iron block facing the electromagnet.

[0009] As a further embodiment of this utility model: the pallet is also provided with a first vertical stop, a positioning groove and a transmission box, wherein the first vertical stop, the first plane, the inclined plane, the second plane, the positioning groove and the second vertical stop are distributed sequentially on the pallet.

[0010] As a further embodiment of this utility model: the rollers are fixedly sleeved with retaining rings on the outer walls of both sides of the support plate, and the support plate is located between two corresponding retaining rings.

[0011] As a further embodiment of this utility model: a plurality of positioning pins are fixedly installed on the top of the lower mold, and positioning holes are provided at the bottom of the upper mold corresponding to the positioning pins, and the positioning pins are adapted to the positioning holes.

[0012] As a further embodiment of this utility model: the linear drive mechanism includes two screws rotatably mounted on both sides of the top surface of a U-shaped base via bearing seats. Nuts are fitted onto the outer walls of each screw. Guide rails are fixedly mounted on the top of the U-shaped base below the screws. The bottom of each nut is slidably fitted onto the corresponding guide rail via a guide groove. A connecting seat is fixedly connected to both nuts. Two electromagnets are fixedly mounted vertically on the outer walls of the connecting seat. A transmission box is fixedly mounted on the top of the U-shaped base. One end of each screw is inserted into the transmission box and a pulley is fixedly fitted onto it. The two pulleys are connected by a synchronous toothed belt. A reduction stepper motor is fixedly mounted on the outer wall of the transmission box, and the output shaft of the reduction stepper motor is fixedly connected to one end of one screw.

[0013] As a further improvement of this utility model, the bottom of the lower mold is provided with chamfers at both the front and rear ends.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model uses a linear drive mechanism in conjunction with an electromagnet adsorption transmission to drive the lower mold and the upper mold to move synchronously to a designated position and then automatically separate. The upper mold remains between the upper and lower heating platforms, while the lower mold is completely moved out onto the U-shaped base. This completely avoids the upper mold blocking the lower mold's part-removing area, providing the operator with ample operating space. The part-removing process is convenient and efficient, significantly reducing product damage and operational safety risks.

[0016] 2. This utility model relies on the inclined structure on the pallet. The upper mold automatically completes the lifting action along the inclined surface through rollers, realizing the separation from the lower mold and subsequent mold closing. There is no need to set up an additional lifting drive mechanism or manual intervention. With the synchronous transmission of the linear drive mechanism, the entire unloading, resetting and mold closing process is completed automatically. The operation steps are simplified, the production efficiency is significantly improved, and no additional vertical space is required.

[0017] 3. By setting up a heat insulation plate, this utility model can effectively block the heat from being transferred to the iron block and electromagnet during mold operation, thus avoiding the impact of high temperature on the adsorption stability of the electromagnet; the polytetrafluoroethylene plate on the surface of the iron block utilizes low friction characteristics to significantly reduce the sliding resistance between the iron block and the electromagnet, ensuring smooth mold movement without affecting the adsorption effect, and is suitable for the high-temperature working environment of the hot press molding machine.

[0018] 4. In this utility model, the chamfered structure at the bottom of the lower mold can effectively avoid the jamming problem caused by the height difference between the U-shaped base and the lower heating platform, ensuring that the mold slides smoothly between the two; the overall structure adopts a U-shaped base semi-enclosed installation, which does not require major modification to the existing hot press molding machine, has strong adaptability, and is compact and easy to maintain, reducing the cost of equipment use and maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the unloading device of a pressure molding machine.

[0020] Figure 2 This is a schematic diagram of the structure of the pallet in the unloading device of a pressure molding machine.

[0021] Figure 3 for Figure 2 A partial sectional view.

[0022] The components include: U-shaped base 1, support plate 2, first vertical stop 3, first plane 4, inclined plane 5, second plane 6, positioning groove 7, second vertical stop 8, transmission box 9, reduction stepper motor 10, screw 11, nut 12, guide rail 13, connecting seat 14, electromagnet 15, lower mold 16, positioning pin 17, chamfer 18, upper mold 19, positioning hole 20, heat insulation plate 21, iron block 22, polytetrafluoroethylene plate 23, support rod 24, roller 25, retaining ring 26, lower heating platform 27, upper heating platform 28, and pulley 29. Detailed Implementation

[0023] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation in the specification, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0027] Please see Figures 1-3 In this embodiment of the present invention, a material unloading device for a pressure molding machine includes a U-shaped base 1 that is semi-enclosed and fixed to the outside of a lower heating platform 27. Multiple support plates 2 are fixedly installed on both sides of the top of the U-shaped base 1 on the lower heating platform 27. A first plane 4, an inclined plane 5, and a second plane 6 are sequentially arranged on the support plates 2. Two electromagnets 15 are connected to the top of the U-shaped base 1 via a linear drive mechanism. The electromagnets 15 are used to drive the movement of a lower mold 16 and an upper mold 19. Iron blocks 22 are installed at the ends of the lower mold 16 and the upper mold 19 facing the electromagnets 15, with each iron block 22 corresponding to one electromagnet 15. Support rods 24 are fixedly installed on the outer walls of both sides of the upper mold 19 at the corresponding locations of the support plates 2. Rollers 25 are rotatably mounted on the outer walls of the support rods 24 above the support plates 2.

[0028] By adopting the above-mentioned scheme, after the pressure forming machine or hot pressing forming machine completes one processing, the upper heating platform 28 is controlled to move upward. Then, the linear drive mechanism is activated to drive two electromagnets 15 to move to the corresponding iron blocks and attract the iron blocks. After that, the electromagnets 15 are driven to drag the lower mold 16 and the upper mold 19 to move simultaneously onto the U-shaped base 1. This causes each roller 25 to move from the first plate 4 along the inclined surface 5 to the second plane 6, so that the upper mold 19 moves upward a certain distance and separates from the lower mold 16. Then, the electromagnet 15 corresponding to the upper mold 19 is turned off, and the electromagnet 15 is used to pull the lower mold 16 completely onto the U-shaped base 1. At this time, the upper mold 19 is still located between the lower heating platform 27 and the upper heating platform 28, and will not obstruct the lower mold 16. This allows the operator to have sufficient operating space to take the product out of the forming cavity of the lower mold 16.

[0029] When performing the next hot pressing process, simply activate the linear drive mechanism to use the electromagnet 15 to push the lower mold 16 to move onto the lower heating table 27. When the electromagnet 15 corresponding to the upper mold 19 aligns with the iron block 22, it will push the upper mold 19 to move, so that the roller 25 moves from the second plane 6 along the inclined plane 5 back to the first plane 4. During this process, the upper mold 19 will move down a certain distance to close with the lower mold 16, making it more convenient to use.

[0030] When the electromagnet 15 attracts the iron block 22, the attraction force of the electromagnet 15 to the iron block 22 is perpendicular to the contact surface of the two. When the iron block 22 slides on the surface of the electromagnet 15, it only needs to overcome the friction force between the contact surfaces (which is much smaller than the magnetic force). Therefore, when the electromagnet 15 attracts the iron block on the upper mold 19 and pulls the upper mold 19 to move, the upper mold 19 can move up and down normally to achieve separation or mold closing with the lower mold 16.

[0031] Specific combination Figure 3 In one embodiment of this utility model, the outer walls of the lower mold 16 and the upper mold 19 are both fixedly installed with heat insulation plates 21 made of ceramic fiber board, the iron block 22 is fixedly installed on the corresponding heat insulation plate 21, and the outer wall of the iron block 22 facing the electromagnet 15 is fixedly installed with polytetrafluoroethylene plate 23.

[0032] By setting the heat insulation plate 21, heat can be prevented from being directly transferred to the iron block 22 when the mold is heated, so that the iron block 22 is kept at a lower temperature, thus avoiding affecting the stability of the electromagnet 15 when adsorbing the iron block 22. By setting the polytetrafluoroethylene plate 23, the low friction characteristics of polytetrafluoroethylene can be used to significantly reduce the sliding resistance between the iron block 22 and the electromagnet 15, allowing the iron block 22 to slide more smoothly on the surface of the electromagnet 15. The thickness of the polytetrafluoroethylene plate 23 is 1-2mm, so as to avoid significantly affecting the stability of the electromagnet 15 when adsorbing the iron block 22.

[0033] Specific combination Figure 2 In one embodiment of the present invention, the pallet 2 is further provided with a first vertical stop 3, a positioning groove 7 and a transmission box 9, and the first vertical stop 3, the first plane 4, the inclined plane 5, the second plane 6, the positioning groove 7 and the second vertical stop 8 are distributed sequentially on the pallet 2.

[0034] By setting the first vertical guard 3 and the second vertical guard 8, the range of motion of the roller 25 can be limited on the support plate 2 to prevent the roller 25 from rolling off both ends of the support plate 2, thereby limiting the range of motion of the upper mold 19. By setting the groove 7, the roller 25 can be positioned on the support plate 2 after the upper mold 19 is separated from the lower mold 16, so that after the iron block 22 on the upper mold 19 is separated from the corresponding electromagnet 15, the upper mold 19 is prevented from being displaced due to the rolling of the roller 25 on the support plate 2.

[0035] Specific combination Figure 1 Furthermore, based on the previous embodiment, the roller 25 is fixedly sleeved with retaining rings 26 on both sides of the outer wall of the support plate 2, and the support plate 2 is located between two corresponding retaining rings 26 to prevent the roller 25 from moving on the support plate 2.

[0036] Specific combination Figure 1-3 In one embodiment of the present invention, a plurality of positioning pins 17 are fixedly installed on the top of the lower mold 16, and positioning holes 20 are provided at the bottom of the upper mold 19 corresponding to the positioning pins 17, and the positioning pins 17 are adapted to the positioning holes 20.

[0037] The positioning hole 20 and the positioning pin 17 work together to improve the mold closing accuracy of the upper mold 19 and the lower mold 16.

[0038] Specific combination Figure 1-3In one embodiment of this utility model, the linear drive mechanism includes two screws 11 rotatably mounted on both sides of the top surface of a U-shaped base 1 via bearing seats. Nuts 12 are fitted onto the outer walls of each screw 11. Guide rails 13 are fixedly mounted on the top of the U-shaped base 1 below the screws 11. The bottom of each nut 12 is slidably fitted onto the corresponding guide rail 13 via a guide groove. The two nuts 12 are fixedly connected to a connecting seat 14. Two electromagnets 15 are fixedly mounted on the outer walls of the connecting seat 14, distributed vertically. A transmission box 9 is fixedly mounted on the top of the U-shaped base 1. One end of each screw 11 is inserted into the transmission box 9 and a pulley 29 is fixedly fitted onto it. The two pulleys 29 are connected by a high-precision synchronous toothed belt. A reduction stepper motor 10 is fixedly mounted on the outer wall of the transmission box 9, and the output shaft of the reduction stepper motor 10 is fixedly connected to one end of one screw 11.

[0039] By starting the acceleration stepper motor 10, the two pulleys 29 and the synchronous toothed belt can drive the two screws 11 to rotate simultaneously. The screws 11 and the nut 12 then drive the connecting seat 14 and the two electromagnets 15 to move linearly on the U-shaped base 1. The guide rail 13 and the guide groove can improve the stability of the nut 12's movement and share the radial force on the screws 11.

[0040] Specific combination Figure 3 In one embodiment of this utility model, the bottom of the lower mold 16 is provided with chamfers 18 at both the front and rear ends. With the two chamfers 18, when there is a height difference between the upper surface of the U-shaped base 1 and the upper surface of the lower heating platform 27, the chamfers 18 can prevent the end of the lower mold 16 from abutting against the end face of the U-shaped base 1 or the lower heating platform 27, so that the lower mold 16 can still slide smoothly between the U-shaped base 1 and the lower heating platform 27.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A discharge device for a pressure molding machine, characterized in that: The system includes a U-shaped base (1) that is semi-enclosed and fixed to the outside of the lower heating platform (27). The top of the U-shaped base (1) is fixedly installed on both sides of the lower heating platform (27) with multiple support plates (2). The support plates (2) are sequentially provided with a first plane (4), an inclined plane (5), and a second plane (6). The top of the U-shaped base (1) is connected to two electromagnets (15) through a linear drive mechanism. The electromagnets (15) are used to drive the lower mold (16) and the upper mold (19) to move. The lower mold (16) and the upper mold (19) are each equipped with an iron block (22) at the end facing the electromagnet (15). The iron block (22) corresponds one-to-one with the electromagnet (15). The outer walls on both sides of the upper mold (19) are fixedly installed with support rods (24) at the corresponding positions of the support plates (2). The outer walls of the support rods (24) above the support plates (2) are rotatably fitted with rollers (25).

2. The unloading device for a pressure molding machine according to claim 1, characterized in that: The outer walls of the lower mold (16) and the upper mold (19) are both fixedly equipped with heat insulation plates (21), the iron block (22) is fixedly installed on the corresponding heat insulation plate (21), and the outer wall of the iron block (22) facing the electromagnet (15) is fixedly equipped with polytetrafluoroethylene plate (23).

3. The unloading device for a pressure molding machine according to claim 1, characterized in that: The pallet (2) is also provided with a first vertical stop (3), a positioning groove (7) and a transmission box (9). The first vertical stop (3), the first plane (4), the inclined plane (5), the second plane (6), the positioning groove (7) and the second vertical stop (8) are distributed sequentially on the pallet (2).

4. The unloading device for a pressure molding machine according to claim 1, characterized in that: The rollers (25) are fixedly fitted with retaining rings (26) on the outer walls of both sides of the tray (2), and the tray (2) is located between two corresponding retaining rings (26).

5. The unloading device for a pressure molding machine according to claim 1, characterized in that: The top of the lower mold (16) is fixedly equipped with multiple positioning pins (17), and the bottom of the upper mold (19) is provided with positioning holes (20) corresponding to the positioning pins (17), and the positioning pins (17) are adapted to the positioning holes (20).

6. The unloading device for a pressure molding machine according to claim 1, characterized in that: The linear drive mechanism includes two screws (11) rotatably mounted on both sides of the top surface of a U-shaped base (1) via bearing seats. Nuts (12) are fitted onto the outer walls of each screw (11). Guide rails (13) are fixedly mounted on the top of the U-shaped base (1) below each screw (11). The bottom of each nut (12) is slidably fitted onto the corresponding guide rail (13) via a guide groove. Both nuts (12) are fixedly connected to a connecting seat (14). The two electromagnetic... Iron (15) is fixedly installed on the outer wall of the connecting seat (14) with the upper and lower parts distributed. A transmission box (9) is fixedly installed on the top of the U-shaped base (1). One end of each of the two screws (11) is inserted into the transmission box (9) and a pulley (29) is fixedly sleeved on it. The two pulleys (29) are connected by synchronous toothed belt transmission. A deceleration stepper motor (10) is fixedly installed on the outer wall of the transmission box (9), and the output shaft of the deceleration stepper motor (10) is fixedly connected to one end of a screw (11).

7. The unloading device for a pressure molding machine according to claim 1, characterized in that: The bottom of the lower mold (16) is provided with chamfers (18) at both the front and rear ends.

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