Multi-section pressure control hot press

Abstract

The utility model belongs to the technical field of hot presses, and particularly relates to a multi-section pressure control hot press which comprises a hot press body, a lower hydraulic cylinder hot pressing portion on the lower side of the hot press body is arranged in a foundation pit, and a main guide column upwards extending out of the foundation pit is arranged on the lower hydraulic cylinder hot pressing portion. An upper hydraulic cylinder hot-pressing part on the upper side of the hot press body is arranged on the upper side of the main guide column, a mold plate which ascends and descends in the axial direction of the main guide column is arranged on the main guide column, and a mold is jointly extruded by the lower hydraulic cylinder hot-pressing part and the upper hydraulic cylinder hot-pressing part outside a foundation pit. The hot pressing parts driven by the hydraulic cylinders are installed at the upper end and the lower end of the hot press, when hot pressing is carried out, the hydraulic cylinders on the upper side and the lower side apply force oppositely to extrude a mold between the hydraulic cylinders, and in the process, pressure can be continuously supplemented and maintained for circulation; and the upper hydraulic cylinder and the lower hydraulic cylinder with different parameters can be matched with each other, so that the pressure value can be flexibly and accurately adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of hot press technology, specifically relating to a hot press with multi-stage pressure control. Background Technology

[0002] A hot press is a device that heats two pre-fluxed, tin-plated parts to a temperature sufficient to melt and flow the solder, forming a permanent electromechanical connection between the parts and the solder after solidification. Heating rates are selectable for different products. The titanium alloy press head ensures uniform temperature, rapid heating, and an exceptionally long service life. The press head features a specially designed horizontally adjustable surface to ensure even pressure distribution on the components. Temperature is digitally controlled for clear and precise readings. A digital pressure gauge is available, allowing for preset pressure ranges.

[0003] A double-layer hot press disclosed in patent CN204894487U includes a frame, a cover, and multiple hot pressing mechanisms. The frame provides support, the cover is mounted on the frame, and the multiple hot pressing mechanisms are arranged vertically within the cover. Each hot pressing mechanism includes an upper mold, a lower mold, and a control panel. The hot pressing mechanism comprises two layers: an upper mold and a lower mold. Multiple sets of upper and lower molds are provided. The upper mold includes an upper template and an upper template drive device connected above it, which drives the upper template to press down. The lower mold includes a lower template and a heat source device disposed within it, which heats the lower template. Both the upper template drive device and the heat source device are connected to the control panel. This invention's hot pressing mechanism can be controlled independently, has a simple and practical structure, saves space and costs, and can simultaneously hot press multiple products.

[0004] In the above scheme, products are placed between multiple sets of upper and lower dies for hot pressing, or products can be hot pressed on multiple hot pressing mechanisms. Each hot pressing mechanism can be controlled independently. Thus, this double-layer hot press can simultaneously hot press multiple products and can be flexibly controlled individually, making it suitable for hot pressing various products. However, the lower die only serves a heating function and cannot be raised or lowered to provide additional pressure to cooperate with the upper die. This reduces the overall pressure adjustment range and sensitivity of the press, thereby affecting the accuracy of pressure transformation and holding. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems by providing a multi-stage pressure control hot press that can solve the technical issues described above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-stage pressure-controlled hot press includes a hot press body. A lower hydraulic cylinder hot pressing section on the lower side of the hot press body is disposed in a foundation pit. A main guide column extending upward from the foundation pit is provided on the lower hydraulic cylinder hot pressing section. An upper hydraulic cylinder hot pressing section on the upper side of the hot press body is disposed on the upper side of the main guide column. A mold plate that moves up and down along its axial direction is provided on the main guide column. The mold is subjected to joint compression by the lower hydraulic cylinder hot pressing section and the upper hydraulic cylinder hot pressing section.

[0008] In the multi-stage pressure-controlled hot press, the mold includes an upper mold plate and a lower mold plate that are slidably sleeved on the main guide column. The upper mold plate is linked with the hot pressing part of the upper hydraulic cylinder, and the lower mold plate is linked with the hot pressing part of the lower hydraulic cylinder.

[0009] In the multi-stage pressure-controlled hot press, the upper hydraulic cylinder hot pressing section includes an upper beam welding frame and an upper hydraulic cylinder. The upper beam welding frame is disposed on the main guide column, and the upper hydraulic cylinder is installed in the upper beam welding frame and moves downward in linkage with the upper mold plate.

[0010] In the multi-stage pressure-controlled hot press, the upper hydraulic cylinder includes a main hydraulic cylinder and a demolding hydraulic cylinder. The main hydraulic cylinder presses downward against the top of the upper mold plate, and the demolding hydraulic cylinder is connected to the top of the upper mold plate.

[0011] In the aforementioned multi-stage pressure-controlled hot press, the lower hydraulic cylinder hot pressing section includes a lower beam welding frame and a lower hydraulic cylinder. The main guide column is inserted into the lower beam welding frame located in the foundation pit, and the lower hydraulic cylinder pushes the lower mold plate upward.

[0012] In the multi-stage pressure-controlled hot press, a movable plate is provided at the output end of the lower hydraulic cylinder, and a plurality of mold ejector rods are provided on the movable plate, with the mold ejector rods evenly abutting against the lower end of the lower mold plate.

[0013] In the multi-stage pressure-controlled hot press, a secondary guide post is provided at the upper end of the lower beam welding frame. The end face of the secondary guide post serves as a limiting surface and abuts against the lower mold plate. The movable plate is sleeved in the secondary guide post and slides up and down.

[0014] In the multi-stage pressure-controlled hot press, a high-level oil tank is provided on the hot pressing section of the upper hydraulic cylinder. The high-level oil tank is connected to a hydraulic system located outside the foundation pit via pipelines.

[0015] In the multi-stage pressure-controlled hot press, the mold is provided with parallel hot oil pipelines, which are connected to an external hot oil pump via hot oil hoses.

[0016] In the multi-stage pressure-controlled hot press, the lower limit of the mold is higher than the ground outside the pit.

[0017] The advantages of this utility model are:

[0018] The hot press is equipped with hot pressing sections driven by hydraulic cylinders at both the top and bottom. During hot pressing, the hydraulic cylinders on the upper and lower sides apply force to the mold between them. During the process, the pressure will continuously cycle between pressure replenishment and pressure holding. The two hydraulic cylinders with different parameters can cooperate with each other to flexibly and accurately adjust the pressure value, ensuring that the material is evenly pressed in the entire mold cavity, reducing problems such as warping, air bubbles or local density inconsistencies caused by uneven pressure. Attached Figure Description

[0019] Figure 1 This is a front view of the overall structure of this utility model.

[0020] Figure 2 This is a side view of the overall structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the hot pressing part of the upper hydraulic cylinder of this utility model.

[0022] Figure 4 This is a schematic diagram of the hot pressing part of the lower hydraulic cylinder of this utility model.

[0023] In the diagram, the components are: lower hydraulic cylinder hot pressing section 1, lower beam welding frame 11, lower hydraulic cylinder 12, movable plate 13, mold ejector rod 14, auxiliary guide column 15, upper hydraulic cylinder hot pressing section 2, upper beam welding frame 21, upper hydraulic cylinder 22, main hydraulic cylinder 23, demolding hydraulic cylinder 24, main guide column 3, mold plate 4, upper mold plate 41, lower mold plate 42, foundation pit 5, high-level oil tank 6, and hydraulic system 7. Detailed Implementation

[0024] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0025] like Figures 1-4 As shown, the multi-stage pressure-controlled hot press includes a hot press body. The lower hydraulic cylinder hot pressing part 1 on the lower side of the hot press body is set in the pit 5. A main guide column 3 extending upward from the pit 5 is provided on the lower hydraulic cylinder hot pressing part 1. The upper hydraulic cylinder hot pressing part 2 on the upper side of the hot press body is set on the upper side of the main guide column 3. A mold plate 4 that moves up and down along its axial direction is provided on the main guide column 3. The mold plate 4 is squeezed by the lower hydraulic cylinder hot pressing part 1 and the upper hydraulic cylinder hot pressing part 2.

[0026] The hot press body is equipped with hot pressing sections driven by hydraulic cylinders at both the top and bottom. During hot pressing, the hydraulic cylinders on the upper and lower sides apply force to the mold between them. During the process, the pressure will continuously cycle between pressure replenishment and pressure holding. The two hydraulic cylinders with different parameters can cooperate with each other to flexibly and accurately adjust the pressure value, ensuring that the material is evenly pressed in the entire mold cavity, reducing problems such as warping, air bubbles or local density inconsistencies caused by uneven pressure.

[0027] In this embodiment, the mold plate 4 includes an upper mold plate 41 and a lower mold plate 42 that are slidably sleeved on the main guide post 3. The upper mold plate 41 is linked with the upper hydraulic cylinder hot pressing part 2, and the lower mold plate 42 is linked with the lower hydraulic cylinder hot pressing part 1.

[0028] The upper and lower mold plates are connected by guide grooves and main guide columns to ensure stable movement of the mold plates and a good fit between the two mold plates after assembly. The upper and lower mold plates are pushed by hydraulic pistons on their respective sides, allowing for independent lifting and lowering, thus enabling more flexible pressure control.

[0029] In this embodiment, the upper hydraulic cylinder hot pressing part 2 includes an upper beam welding frame 21 and an upper hydraulic cylinder 22. The upper beam welding frame 21 is disposed on the main guide column 3, and the upper hydraulic cylinder 22 is installed in the upper beam welding frame 21 and moves downward in conjunction with the upper mold plate 41.

[0030] The upper hydraulic cylinder is fixed in the upper beam welding frame, providing stable pressure support; the welding frame is made of high-strength steel and has undergone welding and reinforcement treatment. The hydraulic cylinder is linked to the upper mold plate, and the pressure and movement of the mold are precisely controlled by hydraulically driving the mold plate to rise and fall.

[0031] In this embodiment, the upper hydraulic cylinder 22 includes a main hydraulic cylinder 23 and a demolding hydraulic cylinder 24. The main hydraulic cylinder 23 presses downward against the top of the upper mold plate 41, and the demolding hydraulic cylinder 24 is connected to the top of the upper mold plate 41.

[0032] The main hydraulic cylinder is responsible for applying high pressure. It moves downward directly against the upper mold plate without being connected to it. At this time, the demolding hydraulic cylinder connected to the upper mold plate also descends. The demolding hydraulic cylinder is used to lift the upper mold plate upward and separate it from the lower mold plate containing the workpiece after pressing. The demolding hydraulic cylinder can be activated during operation to reduce the adhesion between the workpiece and the mold.

[0033] In this embodiment, the lower hydraulic cylinder hot pressing part 1 includes a lower beam welding frame 11 and a lower hydraulic cylinder 12. The main guide column 3 is inserted into the lower beam welding frame 11 located in the foundation pit 5, and the lower hydraulic cylinder 12 pushes the lower mold plate 42 upward.

[0034] The lower hydraulic cylinder is fixed to the lower beam welding frame located in the foundation pit, driving the lower mold plate to rise and providing pressure. The main guide column is inserted into the lower beam welding frame, serving as the movement track for the mold plate and ensuring its vertical lifting and lowering to prevent displacement.

[0035] In this embodiment, a movable plate 13 is provided at the output end of the lower hydraulic cylinder 12, and a plurality of mold ejector rods 14 are provided on the movable plate 13. The mold ejector rods 14 are evenly abutted against the lower end of the lower mold plate 42.

[0036] The piston rod end face of the lower hydraulic cylinder 12 is smaller than that of the lower mold plate 42. In order to apply the thrust more evenly, a movable plate 13 with a projected area of ​​the lower mold plate 42 is added to reduce the pressure. Multiple mold ejector rods 14 are set up so that the thrust can be evenly distributed to various positions of the lower mold plate 42 through the mold ejector rods 14, ensuring that the lower mold plate 42 will not be subjected to concentrated force and deform.

[0037] In this embodiment, a secondary guide post 15 is provided at the upper end of the lower beam welding frame 11. The end face of the secondary guide post 15 serves as a limiting surface and abuts against the lower mold plate 42. The movable plate 13 is sleeved in the secondary guide post 15 and slides up and down.

[0038] The auxiliary guide column 15 is installed on the top surface of the lower beam welding frame 11, mainly used as a guide rail for the lifting and lowering of the movable plate 13, further ensuring the uniform thrust of the lower hydraulic cylinder 12 on the lower mold plate 42. At the same time, the upper end face of the auxiliary guide column 15 serves as a support for the lower mold plate 42 at its lowering limit position, which is the height position of the lower mold plate 42 during loading and unloading, at which time the loading surface of the lower mold plate 42 is 300mm above the ground.

[0039] In this embodiment, a high-level oil tank 6 is provided on the upper hydraulic cylinder hot pressing part 2, and the high-level oil tank 6 is connected to the hydraulic system 7 located outside the foundation pit 5 through pipelines.

[0040] An elevated oil tank is installed above the hot press, providing sufficient hydraulic oil and connected to an external hydraulic system via pipelines to ensure stable operation of the hydraulic cylinders. The oil tank is connected to the hydraulic system via pipelines, which controls the press pressure.

[0041] The system adopts integrated valve block control, and the hydraulic system uses a high-level oil tank. It uses a filling valve and lifting cylinder to realize programmed actions. The hydraulic system uses a two-way cartridge valve and a reversing valve for reliable control. The hydraulic pump is externally mounted, and the oil inlet is equipped with a valve and a flexible connection pipeline for high-pressure filtration. The system pressure, lifting pressure, pressurization pressure, accumulator pressure, and control pressure are displayed with pressure gauges and are uniformly arranged on one panel, fixed in one corner of the hydraulic station, and displayed on the touch screen.

[0042] In this embodiment, the mold plate 4 is provided with parallel hot oil pipelines, which are connected to an external hot oil pump via hot oil hoses.

[0043] The oil inlet and return lines for the mold are arranged in parallel to ensure uniform heating of the mold. The mold is connected to the main pipe via a hot oil hose and is equipped with a hot oil pump including an inlet flange and sealing gasket. The hot oil pump has an oil collection tray at the bottom, and the circulation system is automatically temperature-controlled by a PLC.

[0044] In this embodiment, the lower limit of the mold plate 4 is higher than the ground outside the pit 5.

[0045] The mold design lower limit is more than 300 mm above the ground, that is, the lower mold plate 42 descends to the position of the upper end face of the auxiliary guide post 15 above the ground, to avoid the workpiece from contacting the ground, to ensure the stability of the mold during the pressing process and to improve the safety of operation.

[0046] Hot press operation and process flow: The weighed blank is evenly spread into the mold by the operator. The touchscreen button is activated, the upper cylinder of the press descends, and the demolding hydraulic cylinder follows. When the lower cylinder reaches the high / low pressure switching limit, the lower cylinder begins to rise. The upper and lower main cylinders simultaneously apply and maintain pressure. After multi-stage pressure maintenance, the upper and lower cylinders automatically release pressure. After pressure release, the upper main cylinder detaches from the upper mold plate and automatically returns. When the upper cylinder returns to its upper limit, the demolding cylinder activates and moves in opposite directions with the lower main cylinder to demold. After demolding, the product is manually removed from the hot press. This cycle repeats.

[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multi-stage pressure-controlled hot press, comprising a hot press body, characterized in that, The lower side of the hot press body is provided with a lower hydraulic cylinder hot pressing part (1), and the lower hydraulic cylinder hot pressing part (1) is provided with an upwardly extending main guide column (3). The upper hydraulic cylinder hot pressing part (2) on the upper side of the hot press body is provided on the main guide column (3). The main guide column (3) is provided with a mold plate (4) that moves up and down along its axial direction. The mold plate (4) is squeezed by the lower hydraulic cylinder hot pressing part (1) and the upper hydraulic cylinder hot pressing part (2) together.

2. The multi-stage pressure-controlled hot press according to claim 1, characterized in that, The mold plate (4) includes an upper mold plate (41) and a lower mold plate (42) slidably sleeved on the main guide column (3). The upper mold plate (41) is linked with the upper hydraulic cylinder hot pressing part (2), and the lower mold plate (42) is linked with the lower hydraulic cylinder hot pressing part (1).

3. The multi-stage pressure-controlled hot press according to claim 2, characterized in that, The upper hydraulic cylinder hot pressing part (2) includes an upper beam welding frame (21) and an upper hydraulic cylinder (22). The upper beam welding frame (21) is disposed on the main guide column (3), and the upper hydraulic cylinder (22) is installed in the upper beam welding frame (21) and moves downward in linkage with the upper mold plate (41).

4. The multi-stage pressure-controlled hot press according to claim 3, characterized in that, The upper hydraulic cylinder (22) includes a main hydraulic cylinder (23) and a demolding hydraulic cylinder (24). The main hydraulic cylinder (23) presses downward against the top of the upper mold plate (41), and the demolding hydraulic cylinder (24) is connected to the top of the upper mold plate (41).

5. The multi-stage pressure-controlled hot press according to claim 2, characterized in that, The lower hydraulic cylinder hot pressing part (1) includes a lower beam welding frame (11) and a lower hydraulic cylinder (12). The main guide column (3) is inserted on the lower beam welding frame (11), and the lower hydraulic cylinder (12) pushes the lower mold plate (42) upward.

6. The multi-stage pressure-controlled hot press according to claim 5, characterized in that, The lower hydraulic cylinder (12) has a movable plate (13) at its output end. The movable plate (13) has a plurality of mold ejector rods (14) on it. The mold ejector rods (14) abut against the lower end of the lower mold plate (42) evenly.

7. The multi-stage pressure-controlled hot press according to claim 6, characterized in that, The lower beam welding frame (11) is provided with a secondary guide post (15) at its upper end. The end face of the secondary guide post (15) serves as a limiting surface and abuts against the lower mold plate (42). The movable plate (13) is sleeved in the secondary guide post (15) and slides up and down.

8. The multi-stage pressure-controlled hot press according to claim 1, characterized in that, The upper hydraulic cylinder hot pressing part (2) is provided with a high-level oil tank (6), which is connected to the hydraulic system (7) through a pipeline.

9. The multi-stage pressure-controlled hot press according to claim 1, characterized in that, The mold plate (4) is provided with parallel hot oil pipelines, which are connected to an external hot oil pump via hot oil hoses.

10. The multi-stage pressure-controlled hot press according to claim 1, characterized in that, The lower limit of the mold plate (4) is higher than the reference ground.

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