A ton bucket bottom plate mold and a stamping method using the same

Abstract

The application discloses a ton barrel bottom plate mold, which comprises a first mold, a second mold, a first edge ring and a second edge ring, the first mold is a movable mold, the first edge ring is a movable edge ring, the second edge ring is also a movable edge ring, and the second edge ring can reciprocate relative to the first edge ring under the drive of external force; in the application, the first edge ring and the second edge ring jointly realize the height control of the raw plate material; generally, the raw plate material can be stopped at the height same as the edge of the finished ton barrel bottom plate; compared with the ton barrel bottom plate mold in the prior art, the application can greatly reduce the waste of the finished ton barrel bottom plate, is favorable for reducing the raw material cost, and is favorable for simplifying the waste cutting process in the later period.

Description

Technical Field

[0001] This invention relates to the field of molds, and more particularly to a bottom plate mold for a ton drum and a stamping method using the mold. Background Technology

[0002] A tonne container, also known as a medium bulk container, is a plastic or metal container capable of holding a weight in the ton range. It is primarily used for storing and transporting liquids or granular materials. For example... Figure 1 As shown, the ton container 100 generally needs to be configured with a ton container frame 200 for use. The bottom plate of the ton container frame (often simply referred to as the ton container bottom plate 210) is mainly made by die stamping.

[0003] In existing technology, the bottom plate mold of a ton container mainly includes a moving mold, a first pressure ring, a stationary mold, and a second pressure ring. The moving mold and the first pressure ring are both movable parts, while the stationary mold and the second pressure ring are a one-piece structure, neither of which can move. Before the moving mold and the stationary mold perform stamping, the periphery of the raw material sheet must be pressed tightly using the first and second pressure rings. Since the stationary mold and the second pressure ring are a one-piece structure, the lower surface of the second pressure ring must be lower than the lowest point of the stationary mold (generally, the stationary mold is above the moving mold); otherwise, the raw material sheet will contact the mold before it is clamped by the two pressure rings.

[0004] After the bottom plate of the ton container is stamped, the strip of sheet metal sandwiched between the two pressure rings is scrap and needs to be removed later. For the reasons mentioned above, in the existing technology, the scrap of the bottom plate after processing is always at the lowest point in the thickness direction of the bottom plate. This means that when removing the scrap, not only the horizontal section of scrap sandwiched between the two pressure rings must be removed, but also a section of inclined scrap must be removed. Figure 2 The image shown is a front view of the bottom plate of a ton drum in the prior art. The dotted line indicates the waste material that needs to be removed. It can be seen that the waste material not only has horizontal sections but also inclined sections. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that in the prior art, the second pressure ring and the stationary mold are a single unit structure. The second pressure ring must be lower than the lowest point of the stationary mold, which means that the contact surface of the first pressure ring and the second pressure ring can only be at the lowest point in the thickness direction of the bottom plate of the ton barrel. This results in the final waste material having an inclined section, and the waste material of the whole product is relatively large.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is as follows: a ton barrel bottom plate mold, including a first mold, a second mold, a first pressing ring and a second pressing ring, wherein the first mold is a movable mold, the first pressing ring is a movable pressing ring, the second pressing ring is also a movable pressing ring, and the second pressing ring can reciprocate relative to the first pressing ring under the drive of external force;

[0007] In this invention, the first mold, which serves as the moving mold, is placed below the second mold. The second mold can be either a stationary mold or a moving mold; under normal circumstances, the second mold can be set as a stationary mold. When the ton container bottom plate mold of this invention is in operation, the raw material sheet is first tightly clamped between the first and second pressure rings by their relative movement. At this time, the raw material sheet is always located below the second mold. Then, the first and second pressure rings move together, clamping the raw material sheet, until the raw material sheet stops at a set height. Finally, the first mold closes relative to the second mold, completing the stamping of the raw material sheet.

[0008] In this invention, the first and second pressure rings together achieve height control of the raw material plate. Under normal circumstances, the raw material plate can be kept at the same height as the edge of the bottom plate of the finished ton container. Compared with the existing ton container bottom plate mold, this invention can greatly reduce the waste around the bottom plate of the finished ton container, which not only helps to reduce the cost of raw materials, but also helps to simplify the subsequent waste removal process.

[0009] The first mold and the first pressure ring of the present invention are driven by a hydraulic cylinder, and the second pressure ring is driven by a nitrogen spring. The nitrogen spring can provide a constant design pressure to the second pressure ring while it is moving. This design pressure is the pressure at which the first and second pressure rings clamp the intermediate raw material sheet. Under normal circumstances, the pressure of the hydraulic cylinder driving the first pressure ring should be greater than the design pressure provided by the nitrogen spring to ensure that the first pressure ring pushes the second pressure ring to move to the set position.

[0010] In the aforementioned invention, the first mold and the first pressure ring are driven by different hydraulic cylinders. The first pressure ring itself is a square frame structure, and to ensure its stable rise, multiple hydraulic cylinders are generally required to lift it together. To simplify the structure and reduce the number of actuators, this invention provides a technical solution that uses a single hydraulic cylinder to drive the first mold and the first pressure ring. Specifically, it also includes a lifting auxiliary component.

[0011] The first mold is located below the second mold;

[0012] The lifting auxiliary assembly includes a support plate, a column, a top column, a crossbar, and an elastic element. The support plate is fixed to the bottom of the first mold and is used to connect the telescopic rod of the hydraulic cylinder. A vertical plate is provided on the edge of the support plate, and a trapezoidal groove with a trapezoidal cross-section is provided on the surface of the vertical plate. The top of the top column is fixedly connected to the bottom of the first pressure ring, and a horizontal through hole is provided in the top column. The crossbar is located in the through hole. The column is located on the side of the mold, and one end of the crossbar is inserted into the trapezoidal groove, while the other end contacts the column.

[0013] The column is provided with a horizontal mounting hole, and the elastic element is located in the mounting hole; when the first pressure ring rises to the set position, the crossbar is aligned with the mounting hole;

[0014] When the hydraulic cylinder drives the pallet to rise, the first mold on the pallet rises, and at the same time the pallet drives the top column to rise through the crossbar. The top column drives the first pressure ring to rise. That is, when the hydraulic cylinder initially moves, it will drive the first mold and the first pressure ring to rise synchronously. It should be noted that initially, the height of the first pressure ring should be higher than the highest point of the first mold. As the hydraulic cylinder lifts the material, the first pressure ring will bring the sheet material on it into contact with the second pressure ring. Then, the first and second pressure rings will clamp the sheet material together and rise to a set position. A corresponding limiting mechanism should be set to ensure that the first and second pressure rings cannot rise further after reaching the set position. For example, this invention uses the bottom plate of the second mold to limit the limit position of the second pressure ring's rise. When the first pressure ring, the sheet material, and the second pressure ring rise together to the set position, the crossbar is just aligned with the mounting hole. At this time, the hydraulic cylinder drives the support plate and the first mold to continue to rise. The inclined surface in the trapezoidal groove will drive the crossbar to move horizontally into the mounting hole, and the elastic device is compressed and stored during this process. This means that at this stage, the first mold is driven to rise by the hydraulic cylinder, but the top column and the first pressure ring remain at the current height. Furthermore, the crossbar partially inserted into the mounting hole can ensure that the first pressure ring and the top column cannot descend, so that the pressure of the first and second pressure rings on the sheet material sandwiched in the middle remains unchanged during this period. This pressure comes from the nitrogen spring on the second pressure ring. After the first mold rises and completes the product stamping, the hydraulic cylinder drives the support plate and the first mold to descend. When the trapezoidal groove is aligned with the crossbar, the elastic device drives the crossbar to move laterally and partially insert into the trapezoidal groove. After that, the support plate drives the crossbar, the top column and the first pressure ring to descend synchronously.

[0015] It can be seen that after configuring the lifting auxiliary component, only one hydraulic cylinder is needed to meet the action requirements of the first mold and the first pressure ring, reducing the number of actuators in the entire equipment.

[0016] Specifically, the elastic element includes a movable pin, a spring, and a cover. The movable pin and the spring are both located inside the mounting hole, and the cover seals the mounting hole from the outside. The mounting hole is a stepped hole, and the movable pin is in the shape of a stepped shaft. The stepped hole and the stepped shaft shape of the movable pin work together to limit the movable pin and ensure that the end of the movable pin never exceeds the mounting hole.

[0017] Furthermore, one end of the crossbar located within the trapezoidal groove is hemispherical, and the hemispherical end facilitates the translation of the crossbar driven by the trapezoidal groove.

[0018] Furthermore, the surface of the column is provided with a first guide groove in the vertical direction, and one side of the top column is located in the first guide groove; the surface of the vertical plate is provided with a second guide groove in the vertical direction, and the other side of the top column is located in the second guide groove; the first guide groove and the second guide groove are used to realize the vertical guidance of the top column and the support plate.

[0019] The present invention also provides a stamping method for a bottom plate mold of a ton container, comprising the following steps:

[0020] Step 1: Both the first and second pressure rings are moved to ensure that the first pressure ring is higher than the highest point of the first mold and the second pressure ring is lower than the lowest point of the second mold;

[0021] Step 2: Place the raw material sheet on the first pressure ring;

[0022] Step 3: The first pressure ring moves toward the second pressure ring, and the raw material sheet is sandwiched between the first and second pressure rings; then, the first and second pressure rings move together to the set position. During the movement, the second pressure ring provides a stable reaction force to ensure a stable relative pressure between the first and second pressure rings.

[0023] Step 4: The first mold moves relative to the second mold to complete the stamping of the raw material sheet;

[0024] Step 5: Separate the first mold and the second mold, and separate the first pressure ring and the second pressure ring.

[0025] Beneficial effects: (1) The ton drum bottom plate mold of the present invention designs both the first pressing ring and the second pressing ring as movable parts. The first pressing ring and the second pressing ring together realize the height control of the raw material plate. In actual production, the raw material plate can be kept at the same height as the edge of the finished ton drum bottom plate. Compared with the ton drum bottom plate mold of the prior art, the present invention can greatly reduce the waste around the finished ton drum bottom plate. (2) The ton drum bottom plate mold of the present invention makes the waste removal process and edge treatment process simpler by changing the height of the waste around the stamped finished product, and improves the product production efficiency. (3) The ton drum bottom plate mold of the present invention is equipped with a lifting auxiliary component. Only one hydraulic cylinder is needed to meet the action requirements of the first mold and the first pressing ring, reducing the number of drivers in the whole equipment. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the ton container and ton container frame in the existing technology.

[0027] Figure 2 This is a front view of the bottom plate of a ton container in the existing technology.

[0028] Figure 3 This is a perspective view of the bottom plate mold of the ton barrel in Example 1.

[0029] Figure 4 This is a cross-sectional view of the bottom plate mold of the ton barrel in Example 1.

[0030] Figure 5 This is a working state diagram of the bottom plate mold of the ton barrel in Example 1 (Part 1).

[0031] Figure 6 This is a working state diagram of the bottom plate mold of the ton barrel in Example 1 (Part 2).

[0032] Figure 7 This is a working state diagram of the bottom plate mold of the ton barrel in Example 1 (Part 3).

[0033] Figure 8 This is a perspective view of the lifting auxiliary component in Embodiment 2.

[0034] Figure 9 This is a perspective view of the tray in Example 2.

[0035] Figure 10 This is a three-dimensional view of the top column, upright column, and crossbar in Example 2.

[0036] Figure 11 This is a schematic diagram of the column in Example 2.

[0037] Figure 12 This is a cross-sectional view of the bottom plate mold of the ton barrel in Example 2.

[0038] Figure 13 yes Figure 12 Enlarged view of A.

[0039] Figure 14 This is a working state diagram of the bottom plate mold of the ton barrel in Example 2 (Part 1).

[0040] Figure 15 This is a working state diagram of the bottom plate mold of the ton barrel in Example 2 (Part 2).

[0041] Figure 16 This is a working state diagram of the bottom plate mold of the ton barrel in Example 2 (Part 3).

[0042] The components are as follows: 100, ton container; 200, ton container frame; 210, ton container bottom plate; 300, first mold; 400, second mold; 500, first pressure ring; 600, second pressure ring; 700, raw material sheet; 800, lifting auxiliary component; 810, support plate; 811, vertical plate; 812, second guide groove; 813, trapezoidal groove; 820, column; 821, first guide groove; 822, mounting hole; 830, top column; 831, through hole; 840, crossbar; 850, elastic element; 851, movable pin; 852, spring; 853, sealing plate. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to specific embodiments.

[0044] Example 1

[0045] like Figure 3 and Figure 4 As shown, the bottom plate mold of the ton container in this embodiment includes a first mold 300, a second mold 400, a first pressing ring 500 and a second pressing ring 600. The first mold 300 is a movable mold, the first pressing ring 500 is a movable pressing ring, and the second pressing ring 600 is also a movable pressing ring. The second pressing ring 600 can reciprocate relative to the first pressing ring 500 under the drive of an external force.

[0046] The first mold 300 is located below the second mold 400, and the first pressure ring 500 is located below the second pressure ring 600. The second mold 400 can be a stationary mold or a moving mold; in this embodiment, the second mold 400 is set as a stationary mold. In this embodiment, the first mold 300 and the first pressure ring 500 are driven by different hydraulic cylinders to achieve up-and-down movement; the second pressure ring 600 is driven by a nitrogen spring to achieve up-and-down movement.

[0047] The ton container bottom plate mold in this embodiment is used for stamping such as... Figure 1 and Figure 2 The bottom plate of the ton container shown is stamped using the following method:

[0048] Step 1: As Figure 4 As shown, initially, the first pressure ring 500 is higher than the highest point of the first mold 300, and the second pressure ring 600 is lower than the lowest point of the second mold 400;

[0049] Step 2: Place the raw material sheet 700 on the first pressing ring 500;

[0050] Step 3: As Figure 5 As shown, the first pressure ring 500 moves upward until it contacts the second pressure ring 600, and the raw material sheet 700 is sandwiched between the first pressure ring 500 and the second pressure ring 600; then, as... Figure 6 As shown, the first pressure ring 500 and the second pressure ring 600 move together to the set position. During the movement, the nitrogen spring provides a stable downward pressure on the second pressure ring 600, ensuring a stable relative pressure between the first pressure ring 500 and the second pressure ring 600, tightly clamping the raw material sheet 700 between the first pressure ring 500 and the second pressure ring 600. After the movement is completed, the pressure between the first pressure ring 500 and the second pressure ring 600 continues to be maintained.

[0051] Step 4: As Figure 7As shown, the first mold 300 moves relative to the second mold 400 to complete the stamping of the raw material sheet 700;

[0052] Step 5: Separate the first mold 300 and the second mold 400, and separate the first pressure ring 500 and the second pressure ring 600.

[0053] As can be seen, in this embodiment, the final stopping positions of the first pressing ring 500 and the second pressing ring 600 are controllable during operation of the ton container bottom plate mold. These final stopping positions correspond to the location of the waste material in the final product. This embodiment can stop the raw material plate 700 at the same height as the edge of the finished ton container bottom plate, compared to... Figure 2 This embodiment Figure 7 The absence of inclined sections at the edges of the finished product greatly reduces waste around the bottom plate of the finished ton container, which not only helps reduce raw material costs but also simplifies the subsequent waste removal process.

[0054] Example 2

[0055] To reduce the number of hydraulic cylinders required, this embodiment adds the following to embodiment 1: Figures 8 to 12 The lifting auxiliary component 800 shown is shown.

[0056] The lifting auxiliary assembly 800 includes a support plate 810, a column 820, a top column 830, a crossbar 840, and an elastic element 850. For example... Figure 9 As shown, a vertical plate 811 is provided on the edge of the support plate 810, and a second vertical guide groove 812 is provided on the surface of the vertical plate 811. A trapezoidal groove 813 with a trapezoidal cross-section is provided within the second guide groove 812. Figure 12 and Figure 13 As shown, the support plate 810 is fixed to the bottom of the first mold 300. In this embodiment, the support plate 810 is used to connect the telescopic rod of the hydraulic cylinder. The hydraulic cylinder drives the first mold 300 to move up and down via the support plate 810.

[0057] like Figure 11 As shown, the surface of the column 820 is provided with a first vertical guide groove 821, and the column 820 is also provided with mounting holes 822; as Figure 8 and Figure 10 As shown, one side of the top post 830 is located in the first guide groove 821, and the other side of the top post 830 is located in the second guide groove 812; the first guide groove 821 and the second guide groove 812 are used to guide the top post 830 and the support plate 810 up and down.

[0058] like Figure 12 and Figure 13As shown, the top of the top post 830 is fixedly connected to the bottom of the first pressure ring 500. A horizontal through hole 831 is provided in the top post 830. A crossbar 840 is located within the through hole 831. One end of the crossbar 840 is hemispherical and inserts into the trapezoidal groove 813 of the support plate 810, while the other end contacts the upright post 820. The elastic device 850 includes a movable pin 851, a spring 852, and a sealing plate 853. Both the movable pin 851 and the spring 852 are located within the mounting hole 822. The sealing plate 853 seals the mounting hole 822 from the outside. The mounting hole 822 is a stepped hole, and the movable pin 851 is in the shape of a stepped shaft. The stepped hole, in conjunction with the stepped shaft shape of the movable pin 851, limits the movement of the movable pin 851, ensuring that the end of the movable pin 851 never exceeds the mounting hole 822.

[0059] The stamping method of the ton container bottom plate mold in this embodiment is as follows:

[0060] Step 1: As Figure 12 As shown, initially, the first pressure ring 500 is higher than the highest point of the first mold 300, and the second pressure ring 600 is lower than the lowest point of the second mold 400; one end of the crossbar 840 is in the trapezoidal groove 813, and the crossbar 840 is located directly below the mounting hole 822 of the column 820.

[0061] Step 2: Place the raw material sheet 700 on the first pressing ring 500;

[0062] Step 3: As Figure 14 As shown, the hydraulic cylinder drives the pallet 810 upward, and the first mold 300 on the pallet 810 rises. Simultaneously, the pallet 810 drives the top column 830 upward via the crossbar 840, and the top column 830 drives the first pressure ring 500 upward. That is, during the initial operation of the hydraulic cylinder, the first mold 300 and the first pressure ring 500 rise synchronously. After the first pressure ring 500 moves upward, it contacts the second pressure ring 600, and the raw material sheet 700 is clamped between the first pressure ring 500 and the second pressure ring 600. Afterward, as... Figure 15 As shown, the support plate 810 continues to lift the first mold 300 and the first pressure ring 500 until the first pressure ring 500 and the second pressure ring 600 reach their highest positions. At this time, the crossbar 840 is exactly aligned with the mounting hole 822. It should be noted that after the first pressure ring 500 and the second pressure ring 600 come into contact, the nitrogen spring 852 provides a stable downward pressure on the second pressure ring 600 throughout the process, ensuring a stable relative pressure between the first pressure ring 500 and the second pressure ring 600, and tightly clamping the raw material plate 700 between the first pressure ring 500 and the second pressure ring 600.

[0063] Step 4: As Figure 16As shown, the support plate 810 continues to drive the first mold 300 upward until it closes with the second mold 400, completing the stamping of the raw material sheet 700. During this process, the inclined surface in the trapezoidal groove 813 will drive the crossbar 840 to move horizontally into the mounting hole 822. The crossbar 840 will partially insert into the mounting hole 822 and compress the spring 852. After the crossbar 840 separates from the trapezoidal groove 813, the support plate 810 and the top column 830 will no longer be linked. During this upward phase of the first mold 300, the first pressure ring 500 and the top column 830 will remain in their original positions.

[0064] Step 5: The support plate 810 drives the first mold 300 to move downwards, and the first mold 300 and the second mold 400 separate. During the downward movement of the support plate 810, when the trapezoidal groove 813 is aligned with the crossbar 840, the elastic device 850 drives the crossbar 840 to move laterally and partially insert into the trapezoidal groove 813. After that, the support plate 810 drives the crossbar 840, the top column 830 and the first pressure ring 500 to move downwards synchronously.

[0065] As can be seen, after configuring the lifting auxiliary component 800 in this embodiment, only one hydraulic cylinder is needed to meet the action requirements of the first mold 300 and the first pressure ring 500, reducing the number of actuators in the entire device.

[0066] Although embodiments of the present invention have been described in the specification, these embodiments are merely illustrative and should not be construed as limiting the scope of protection of the present invention. Various omissions, substitutions, and modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bottom plate mold for a ton container, comprising a first mold, a second mold, a first pressing ring, and a second pressing ring, wherein the first mold is a movable mold, and the first pressing ring is a removable pressing ring, characterized in that: The second pressure ring is also a movable pressure ring, and the second pressure ring can reciprocate relative to the first pressure ring under the drive of an external force.

2. The ton container bottom plate mold according to claim 1, characterized in that: The first mold and the first pressure ring are driven by a hydraulic cylinder.

3. The ton container bottom plate mold according to claim 1, characterized in that: The second pressure ring is driven by a nitrogen spring.

4. The ton container bottom plate mold according to claim 1, characterized in that: It also includes lifting auxiliary components; The first mold is located below the second mold; The lifting auxiliary assembly includes a support plate, a column, a top column, a crossbar, and an elastic element. The support plate is fixed to the bottom of the first mold, and a vertical plate is provided on the edge of the support plate. The surface of the vertical plate is provided with a trapezoidal groove with a trapezoidal cross-section. The top of the top column is fixedly connected to the bottom of the first pressure ring, and a horizontal through hole is provided in the top column. The crossbar is located in the through hole. The column is located on the side of the mold, and one end of the crossbar is inserted into the trapezoidal groove, while the other end contacts the column. The column is provided with a horizontal mounting hole, and the elastic element is located in the mounting hole; when the first pressure ring rises to the set position, the crossbar is aligned with the mounting hole.

5. The ton container bottom plate mold according to claim 4, characterized in that: The elastic element includes a movable pin, a spring, and a cover. The movable pin and the spring are both located inside the mounting hole, and the cover seals the mounting hole from the outside.

6. The ton drum bottom plate mold according to claim 5, characterized in that: The mounting hole is a stepped hole, and the movable pin is in the shape of a stepped shaft.

7. The ton drum bottom plate mold according to claim 6, characterized in that: The end of the crossbar located within the trapezoidal groove is hemispherical.

8. The ton drum bottom plate mold according to claim 7, characterized in that: The surface of the column is provided with a first guide groove in the vertical direction, and one side of the top column is located in the first guide groove.

9. The ton container bottom plate mold according to claim 8, characterized in that: The surface of the vertical plate is provided with a second guide groove in the vertical direction, and the other side of the top column is located in the second guide groove.

10. A stamping method for a ton drum bottom plate mold as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Both the first and second pressure rings are moved to ensure that the first pressure ring is higher than the highest point of the first mold and the second pressure ring is lower than the lowest point of the second mold; Step 2: Place the raw material sheet on the first pressure ring; Step 3: The first pressure ring moves toward the second pressure ring, and the raw material sheet is sandwiched between the first and second pressure rings; then, the first and second pressure rings move together to the set position. During the movement, the second pressure ring provides a stable reaction force to ensure a stable relative pressure between the first and second pressure rings. Step 4: The first mold moves relative to the second mold to complete the stamping of the raw material sheet; Step 5: Separate the first mold and the second mold, and separate the first pressure ring and the second pressure ring.

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