Polyurethane foam forming hot press

Abstract

The utility model discloses a polyurethane foam forming hot press. The polyurethane foam forming hot press comprises a rack, a transplanting mechanism, a mold and a hot pressing mechanism, a workbench is arranged in a rack, a transplanting mechanism is arranged on the workbench, a carrying table is provided with a first heating plate, a carrying plate and a magnetic positioning pin, movement between stations is achieved through cooperation of a sliding rail and a sliding block and adjustment of a motor driving screw, and a mold can be rapidly replaced and accurately positioned. And a lower die of the die is detachably mounted on the carrying plate through a magnetic positioning pin. The hot pressing mechanism is located above the transplanting mechanism and comprises a heating assembly, and accurate vertical movement is achieved through a guide column, a top plate, a linear driving mechanism and a moving plate. The heating assembly is provided with a preheating plate and a second heating plate, and layered heating can be achieved. In addition, a protective baffle is arranged on the workbench to separate stations to guarantee safety, and a coaming and a heat removal fan are arranged on the rack to control temperature. The hot press solves the problems that a traditional equipment mold is tedious to replace, the positioning precision is insufficient, and the hot pressing efficiency is low, can effectively improve the production efficiency and the product quality, and adapts to different process requirements.

Description

Technical Field

[0001] This utility model relates to the field of hot press technology, specifically to a hot press for molding polyurethane foam. Background Technology

[0002] In modern industrial production, polyurethane foam, with its excellent properties such as light weight, heat insulation, sound absorption, and cushioning, has been widely used in many fields such as furniture, automobiles, and aerospace. The molding process of polyurethane foam is crucial, as it directly affects the quality and performance of the foam. Hot pressing, as a commonly used method for molding polyurethane foam, enables the foam to achieve ideal shape and density under specific temperature and pressure conditions.

[0003] While existing hot presses for polyurethane foam molding meet production needs to some extent, they still have several shortcomings. First, traditional equipment involves complex and time-consuming mold changes, reducing production efficiency. Second, the lack of a precise positioning mechanism necessitates recalibration after each mold installation, increasing worker workload and affecting product quality stability. Finally, the heating system design of traditional hot presses is not flexible enough to adapt well to different production process requirements, limiting their application range.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a polyurethane foam molding hot press, which realizes the rapid positioning and replacement of molds through magnetic positioning pins, improves molding efficiency by adopting a multi-worker displacement mechanism, adapts to different process requirements by combining adjustable heating components, and optimizes the operation safety and hot pressing environment through protective baffles and heat exhaust fans. It effectively solves the problems of cumbersome mold replacement, insufficient positioning accuracy and low hot pressing efficiency of traditional equipment.

[0006] Technical Solution: This utility model provides a polyurethane foam molding hot press machine, including a frame, a transfer mechanism, a mold, and a hot pressing mechanism. The frame contains a worktable. The transfer mechanism, located on the worktable, includes a carrier platform. A first heating plate is mounted on the carrier platform, and a mounting plate is mounted on the first heating plate. A set of magnetic positioning pins is provided on the mounting plate. The transfer mechanism is used to move between different workstations. The mold includes an upper mold and a lower mold. The lower mold is detachably mounted on the mounting plate via magnetic positioning pins. The polyurethane foam is placed on the lower mold. The hot pressing mechanism is located above the transfer mechanism and includes a heating assembly. The lower mold is detachably mounted below the heating assembly. The hot pressing mechanism presses the upper and lower molds together from top to bottom. The magnetic positioning pins on the mounting plate allow for the detachable installation of the lower mold, facilitating mold replacement and fixation, ensuring accurate mold positioning during hot pressing. The hot pressing mechanism presses the upper and lower molds together from top to bottom, applying pressure and heat to the polyurethane foam placed on the lower mold to form the foam.

[0007] Furthermore, in the polyurethane foam molding hot press of this application, the transfer mechanism further includes a set of slide rails, and the bottom of the platform is provided with a slider that cooperates with the slide rails. The sliding cooperation between the slide rails and the sliders provides stable guidance for the movement of the platform between different positions, ensuring smooth movement of the platform and preventing displacement of the polyurethane foam within the mold due to shaking, thereby ensuring the quality stability of the hot pressing molding.

[0008] Furthermore, in this application, a polyurethane foam molding hot press includes an adjusting lug on the side of the worktable away from the first heating plate. A pair of adjusting seats are also provided along the slide rail direction on the worktable. The adjusting lug is located between the two adjusting seats along the slide rail direction. All three are connected by a screw. A motor is mounted on one of the adjusting seats, and the motor drives the screw to rotate, thereby adjusting the worktable's movement along the slide rail. The motor-driven screw rotation automates the adjustment and movement of the worktable, reducing the workload and errors of manual adjustment, improving the efficiency and consistency of adjustment, and thus enhancing the overall production efficiency and automation level of the hot press. The design of the adjusting lug being located between the two adjusting seats limits the movement range of the worktable, ensuring that the worktable moves within a safe and effective stroke.

[0009] Furthermore, in this application, a polyurethane foam molding hot press further includes a set of guide columns vertically mounted on a worktable. A top plate is mounted on the top of each guide column, and a linear drive mechanism is mounted on the top plate. The output end of the linear drive mechanism is connected to a movable plate, which is positioned between the worktable and the top plate. The guide columns pass through the movable plate, and the linear drive mechanism drives the movable plate to move up and down along the guide columns. The set of guide columns vertically mounted on the worktable and passing through the movable plate provides stable vertical guidance for the movable plate's up-and-down movement. The linear drive mechanism allows the movable plate to move precisely up and down along the guide columns. By controlling the output of the linear drive mechanism, the downward stroke and pressure of the hot press mechanism can be accurately adjusted to meet the precise control of polyurethane foam hot pressing under different process requirements.

[0010] Furthermore, in this application, a polyurethane foam molding hot press includes a heating assembly comprising a preheating plate and a second heating plate. A set of support rods is mounted downwards on a movable plate, and a hanging plate is mounted at the lower end of the support rods. The upper mold is detachably mounted on the side of the hanging plate away from the top plate. The second heating plate is mounted on the side of the hanging plate away from the worktable, and a preheating plate is provided on the second heating plate. The heating assembly with a preheating plate and a second heating plate enables layered heating of the polyurethane foam. The preheating plate first preheats the foam to a certain temperature base, and then the second heating plate provides deeper heating, ensuring uniform and sufficient heating of the foam, meeting the heating requirements at different stages, and improving the hot pressing molding effect. The layered heating plates facilitate more precise temperature control. The temperatures of the preheating plate and the second heating plate are adjusted separately according to the characteristics of the polyurethane foam and the hot pressing process requirements, achieving refined temperature management during the hot pressing process.

[0011] Furthermore, in this application, a polyurethane foam molding hot press machine includes a vertically mounted baffle on the worktable, which divides the worktable into a first station and a second station. The baffle has an opening, and the transfer mechanism drives the platform to move through the opening between the first and second stations. The vertically mounted baffle on the worktable divides it into the first and second stations, providing physical separation. This not only prevents interference between items at different stations but also protects the operator's safety to a certain extent, preventing accidental contact with hazardous areas during hot pressing. The opening allows the platform to move freely between the first and second stations, enabling the equipment to flexibly switch between different stations according to production needs. It can perform operations such as feeding and pre-treatment at one station and hot pressing at another.

[0012] Furthermore, in this application, a polyurethane foam molding hot press includes a frame with a surrounding panel and a heat dissipation fan. The surrounding panel provides protection for the internal components of the hot press, while the heat dissipation fan effectively removes heat generated during operation. Since a significant amount of heat is generated during the polyurethane foam molding hot pressing process, timely heat dissipation effectively controls the internal temperature of the equipment, preventing excessive heat from affecting its performance and stability. It also helps maintain the appropriate temperature environment required for the hot pressing process, ensuring product quality.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0014] 1. The polyurethane foam molding hot press of this utility model achieves rapid mold positioning and replacement through magnetic positioning pins, simplifying the mold replacement process, reducing replacement time, and improving production efficiency. At the same time, the magnetic positioning pins ensure the accurate positioning of the mold during the hot pressing process, improving the stability of product quality.

[0015] 2. The polyurethane foam molding hot press described in this utility model, through its multi-station transfer mechanism and adjustable heating components, can adapt to different production process requirements. The slide rail and slider design of the transfer mechanism ensures the stability of the platform's movement between different stations, avoiding foam position displacement caused by shaking. The layered heating design of the heating components (preheating plate and second heating plate) achieves precise temperature control of the foam, ensuring the uniformity and consistency of hot pressing molding, further improving product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a polyurethane foam molding hot press according to the present invention;

[0017] Figure 2 This is a structural diagram of a polyurethane foam molding hot press after disassembly according to the present invention;

[0018] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0019] Figure 4 This is a schematic diagram of a thermoformed part.

[0020] Explanation of reference numerals in the instruction manual:

[0021] 1-Frame, 11-Enclosure, 12-Exhaust fan;

[0022] 2-Workbench, 21-Adjusting seat, 22-Guard plate, 221-Port;

[0023] 3-Transplanting mechanism, 31-Platform, 311-Adjusting ear, 32-First heating plate, 33-Mounting plate, 331-Magnetic positioning pin, 34-Slide rail, 35-Slider, 36-Motor;

[0024] 4-Mold, 41-Upper mold, 42-Lower mold;

[0025] 5-Hot pressing mechanism, 51-Heating component, 511-Preheating plate, 512-Second heating plate, 52-Guide column, 53-Top plate, 54-Linear drive mechanism, 55-Moving plate, 56-Support rod, 57-Hanging plate. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figure 1-3 A polyurethane foam molding hot press shown and Figure 4 The hot-pressed part shown is subjected to the following operations in actual production applications:

[0029] Preparation: Place the polyurethane foam raw material on the lower mold 42. At this time, the lower mold 42 is detachably installed on the mounting plate 33 via the magnetic positioning pin 331 on the mounting plate 33. The magnetic positioning pin 331 can ensure that the lower mold 42 is quickly and accurately positioned, preparing for the subsequent hot pressing work.

[0030] Platform movement: The motor 36 is started. The motor 36 is mounted on one of the adjusting seats 21 along the slide rail 34 on the worktable 2. The motor 36 drives the screw to rotate. An adjusting lug 311 is provided on the side of the platform 31 away from the first heating plate 32. The adjusting lug 311 is located between two adjusting seats 21, and all three are connected by a screw. The rotation of the screw drives the platform 31 to move along the slide rail 34. The slider 35 at the bottom of the platform 31 cooperates with the slide rail 34 to ensure smooth movement of the platform 31. During movement, the platform 31 passes through the opening 221 of the guardrail 22 on the worktable 2, moving from the first workstation to the second workstation. The guardrail 22 divides the worktable 2 into the first and second workstations, providing protection and separation to prevent interference between items at different workstations and ensuring operator safety.

[0031] Hot pressing operation: The hot pressing mechanism 5 is located above the transplanting mechanism 3. The linear drive mechanism 54 of the hot pressing mechanism 5 is installed on the top plate 53. The output end of the linear drive mechanism 54 is connected to the moving plate 55. The guide post 52 is vertically installed on the worktable 2 and passes through the moving plate 55. The linear drive mechanism 54 drives the moving plate 55 to move downward along the guide post 52. A set of support rods 56 is installed below the moving plate 55. The lower end of the support rods 56 is equipped with a hanging plate 57. The upper mold 41 is detachably installed on the side of the hanging plate 57 away from the top plate 53. The heating assembly 51 includes a preheating plate 511 and a second heating plate 512. The second heating plate 512 is installed on the side of the hanging plate 57 away from the worktable 2, and the preheating plate 511 is set on the second heating plate 512. During hot pressing, the preheating plate 511 first preheats the polyurethane foam to a certain temperature base. Then, the second heating plate 512 performs deep heating to ensure that the foam is heated evenly and fully to meet the requirements of hot pressing. The movable plate 55 drives the upper mold 41 to press down, cooperating with the lower mold 42 to apply pressure and heat to the polyurethane foam, so that it is hot-pressed under suitable temperature and pressure conditions.

[0032] Heat dissipation: During the hot pressing process, the enclosure 11 on the frame 1 protects the internal components of the hot press. The heat exhaust fan 12 on the enclosure 11 promptly dissipates the heat generated by the hot press to the outside of the equipment, effectively controlling the internal temperature and maintaining a suitable temperature environment required for the hot pressing process, thus ensuring stable product quality and equipment performance.

[0033] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A polyurethane foam forming hot press, characterized in that: It comprises: a rack (1), a workbench (2) is arranged in the rack (1); a transplanting mechanism (3) is arranged on the workbench (2) and comprises a carrier (31), a first heating plate (32) is installed on the carrier (31), a carrying plate (33) is installed on the first heating plate (32), a group of magnetic positioning pins (331) are arranged on the carrying plate (33), and the transplanting mechanism (3) is used for moving between different stations; a mold (4) comprising an upper mold (41) and a lower mold (42), the lower mold (42) is detachably installed on the carrying plate (33) through the magnetic positioning pins (331), and the polyurethane foam is arranged on the lower mold (42); a hot pressing mechanism (5) is arranged above the transplanting mechanism (3) and comprises a heating assembly (51), the lower mold (42) is detachably installed below the heating assembly (51), and the hot pressing mechanism (5) presses the upper mold (41) and the lower mold (42) from top to bottom.

2. The polyurethane foam forming hot press according to claim 1, characterized in that: the transplanting mechanism (3) further comprises a group of slide rails (34), the bottom of the carrier (31) is provided with a sliding block (35) matched with the slide rails (34), and the carrier (31) moves between different stations through the sliding cooperation with the slide rails (34).

3. The polyurethane foam forming hot press according to claim 2, characterized in that: an adjusting ear (311) is arranged on the side of the carrier (31) away from the first heating plate (32), a pair of adjusting seats (21) are further arranged on the workbench (2) along the direction of the slide rails (34), the adjusting ear (311) is arranged between the two adjusting seats (21) along the direction of the slide rails (34), and the three are connected through a screw rod, one of the adjusting seats (21) is provided with a motor (36), the motor (36) drives the screw rod to rotate, so that the carrier (31) can be adjusted and moved along the slide rails (34).

4. The polyurethane foam forming hot press according to claim 1, characterized in that: the hot pressing mechanism (5) further comprises a group of guide columns (52), the guide columns (52) are vertically installed on the workbench (2), a top plate (53) is installed at the top end of the guide columns (52), a linear driving mechanism (54) is installed on the top plate (53), a moving plate (55) is connected to the output end of the linear driving mechanism (54), the moving plate (55) is arranged between the workbench (2) and the top plate (53), the guide columns (52) are arranged in the moving plate (55), and the linear driving mechanism (54) drives the moving plate (55) to move up and down along the guide columns (52).

5. The polyurethane foam forming hot press according to claim 4, characterized in that: The heating assembly (51) comprises a pre-heating plate (511) and a second heating plate (512), a set of support rods (56) are downwardly installed on the moving plate (55), a hanging plate (57) is installed at the lower end of the support rods (56), the upper die (41) is detachably installed on the side of the hanging plate (57) away from the top plate (53), the second heating plate (512) is installed on the side of the hanging plate (57) away from the workbench (2), and the pre-heating plate (511) is arranged on the second heating plate (512). 6.The polyurethane foam forming and hot pressing machine according to claim 1, characterized in that: The workbench (2) is also vertically provided with a guard plate (22), the guard plate (22) divides the workbench into a first station and a second station, the guard plate (22) is provided with a through opening (221), and the transplanting mechanism (3) drives the carrier (31) to move in the first station and the second station through the through opening (221). 7.The polyurethane foam forming and hot pressing machine according to claim 1, characterized in that: The rack (1) is provided with a surrounding plate (11), and the surrounding plate (11) is provided with an exhaust fan (12).

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