A self-falling type plate changing device

Abstract

The utility model discloses a self -falling formula changes edition device, including diaphragm, needle library lock needle unit, work lock needle unit and elevating drive unit. Needle library lock needle unit is located the top of template, and work lock needle unit is located below it, is used for locking the work thimble of passing through template. The needle library lock needle unit has the distant assembly state and the close distance edition change state with template between, the vertical spacing of thimble and template is initial spacing under the distant assembly state, the spacing of both sides is smaller buffer spacing under the close distance edition change state. Elevating drive unit drives both sides from the distant assembly state switches to the close distance edition change state, the needle library lock needle unit releases all thimble at this time, and thimble freely falls, and template blocks part thimble and is locked by needle library lock needle unit, and the rest thimble passes through template and becomes work thimble and is locked by work lock needle unit. The utility model releases after reducing the spacing between thimble and template, reduces the impact force of thimble to diaphragm, and adapts thinner diaphragm, and utilizes thimble self -weight falling simultaneously, and the through -hole of half cover on template blocks the interference needle automatically, does not need manual plugging, thereby improves the efficiency of adjusting machine.

Description

Technical Field

[0001] This utility model relates to the field of plate changing in product dispensing machines, and more particularly to a self-falling plate changing device. Background Technology

[0002] In the field of product picking machines (also known as waste removal machines), needle plate type product picking machines are usually used. In this type, the upper die top pin corresponds to the waste part of the sheet material, and the lower die top pin corresponds to the finished part of the sheet material. During operation, the upper and lower dies are engaged and pressed to separate the waste part and the finished part along the tear line.

[0003] The setup time for this type of needle plate type product dispensing machine is relatively long, mainly because changing the ejector pin arrangement (hereinafter referred to as plate changing) is time-consuming. To achieve automatic plate changing, Japanese Patent JP2015013349A discloses a solution including an upper mold, an upper template, a lower mold, and a lower template. Paragraph 0029 of the specification states that moving the upper template can drive the ejector pins upwards, thereby changing the ejector pin arrangement of the upper mold; furthermore, paragraph 0034 states that moving the lower template upwards relative to the lower mold can cause the lower mold pins to move downwards, thereby changing the ejector pin arrangement of the lower mold. The template includes a diaphragm and a base plate; changing the diaphragm achieves the change in the ejector pin arrangement. The solution in the Japanese patent uses a diaphragm to push the ejector pins to adjust the effective ejector pin layout, replacing manual plate changing.

[0004] However, in practice, the following problems still exist: 1. During the plate changing process, when the plate moves upward, it directly impacts and pushes the ejector pin, so that the membrane on the plate has to bear the weight of the ejector pin and provide the thrust to push the ejector pin, which means that the membrane needs to have a certain thickness. 2. Tear lines often pass through some pinholes. The ejector pins corresponding to these pinholes (hereinafter referred to as interference pins) will press on both the waste material and the finished product at the same time, which can easily damage the finished product during stamping. Therefore, these interference pins must be eliminated. To do this, it is necessary to manually seal the pinholes on the diaphragm corresponding to the interference pins, which still limits the machine setup time. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a self-falling plate changing device that reduces the impact on the mold plate by releasing the ejector pins when they are close to the template, thereby enabling the replacement of ejector pin arrangements using thinner mold plates.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a self-falling plate changing device, comprising a diaphragm, characterized in that: it further comprises a needle magazine locking unit, a working needle locking unit, and a lifting drive unit; the needle magazine locking unit is disposed above the template; the working needle locking unit is disposed below the needle magazine locking unit, and the working needle locking unit is used to lock working pins that pass through the template; the needle magazine locking unit and the template have a long-distance assembly state and a short-distance plate changing state; in the long-distance assembly state, the needle magazine locking unit is filled with pins, and the vertical distance between the pins and the template is... The vertical spacing is the initial spacing; in the close-range changeover state, the vertical spacing between the two is the buffer spacing, which is smaller than the initial spacing; the working locking pin unit is located below the needle magazine locking pin unit; the lifting drive unit is used to drive the needle magazine locking pin unit and the template to move closer together, so that the two switch from the remote assembly state to the close-range changeover state; when the needle magazine locking pin unit is in the close-range changeover state, it releases all the ejector pins, the ejector pins fall freely, the template blocks some ejector pins, which are then locked back by the needle magazine locking pin unit, and the remaining ejector pins pass through the template to become working ejector pins and are locked by the working locking pin unit.

[0007] This invention first reduces the distance between the ejector pin and the template before releasing the ejector pin, allowing it to fall a short distance (or even zero distance) solely by its own weight. This reduces the impact force on the diaphragm, making it suitable for thinner diaphragms. Because the ejector pin falls under its own weight, the impact force is smaller, allowing even partially covered through-holes in the template to prevent the ejector pin from falling, thus automatically eliminating interference pins without manual sealing and further shortening setup time. Furthermore, the working pin locking unit can lock the falling working ejector pin. By bringing the ejector pin closer to the template, releasing the pin magazine locking unit, and locking the respective ejector pins by the pin magazine locking unit and the working pin locking unit, the plate changing process can be completed, eliminating the need for manual sealing of corresponding interference pin holes on the template and improving setup efficiency.

[0008] Preferably, the template is mounted on a template mounting plate, and the lifting drive unit is connected to the template mounting plate to drive the template to move up and down relative to the needle magazine locking unit.

[0009] Preferably, the lifting drive unit is connected to the needle magazine locking unit to drive the needle magazine locking unit to move up and down relative to the template.

[0010] Based on the transmission connection between the lifting drive unit and the needle magazine locking plate, the working locking needle unit is positioned above the template. The needle magazine locking needle unit and the working locking needle unit are respectively mounted on a movable base. The lifting drive unit is connected to the movable base to drive the needle magazine locking needle unit and the working locking needle unit to move synchronously up and down relative to the template. A single power source can be used to achieve the engagement between the ejector pin and the template, as well as the movement of the working locking needle unit and the needle magazine locking needle unit.

[0011] Preferably, the working locking pin unit is located below the template, and a pinless base plate is provided below the working locking pin unit. The base plate is used to ensure that the working pin remains within the working locking pin unit. The base plate can limit the downward stroke of the pin and prevent the pin from detaching from the working locking pin plate.

[0012] Furthermore, the needle magazine locking unit includes a needle magazine locking plate and a needle magazine support plate, with the locking plate positioned above the support plate. The support plate has several guide pin holes of equal diameter. The working locking unit includes a working locking plate and a working support plate, with the support plate positioned below the locking plate. Both the locking plate and the working plate have several locking holes, and each is equipped with its own longitudinal push drive. The guide pin holes guide the movement of the ejector pins, and the locking holes lock the corresponding ejector pins.

[0013] With the working locking pin unit positioned above the template, the working support plate is equipped with several guide holes I, each guide hole I being a stepped hole with a T-shaped longitudinal section. The T-shaped guide holes I guide the working pin rod through the hole and also utilize the step to block the working pin head, allowing the working pin to automatically position itself after falling into place. With the working support plate positioned below the working locking pin plate, the working support plate is equipped with several guide holes II, which are equal-diameter through holes. The guide holes II with equal-diameter through holes can guide the working pin, so that the working pin is stably positioned by the base plate, ensuring stable locking of the working locking pin unit.

[0014] Preferably, the buffer gap is equal to 0, or the buffer gap is greater than 0. The ejector pin directly contacts the template before being released, which can further eliminate the impact force of the ejector pin on the diaphragm, and the gap between the ejector pin and the template can eliminate the influence of the length tolerance of the ejector pin during the manufacturing process. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0016] Figure 2 This is a top view of Embodiment 1 of this utility model.

[0017] Figure 3 This is a utility model Figure 2 A cross-sectional view along the AA direction.

[0018] Figure 4 This is a utility model Figure 2 A magnified view of part B. Figure 5 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0019] Figure 6This is a top view of Embodiment 2 of this utility model.

[0020] Figure 7 This is a utility model Figure 6 Sectional view along the CC direction.

[0021] Figure 8 This is a cross-sectional view of the working locking pin unit of Embodiment 2 of this utility model.

[0022] The names of the body parts referred to by the numbers in the above attached diagrams are as follows: The components include: 1. Template; 11. Template mounting plate; 12. Guide pin hole; 2. Needle magazine locking unit; 21. Needle magazine locking plate; 22. Needle magazine support plate; 23. Guide pin through hole; 3. Working locking unit; 31. Working locking plate; 32. Working locking support plate; 33. Guide hole I; 34. Guide hole II; 35. Base plate; 4. Locking pin hole; 5. Lifting drive unit; 6. Ejector pin; 7. Moving seat; 8. Platform; 9. Vertical push drive component. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example 1

[0024] like Figure 1 As shown, a self-falling plate changing device includes a template 1, a needle magazine locking unit 2, a working needle locking unit 3, and a lifting drive unit 5. The working needle locking unit is located below the needle magazine locking unit, and the working needle locking unit 3 is used to lock the working pins that pass through the template 1. The working needle locking unit 3 can be located above or below the template 1. In this embodiment, the working needle locking unit 3 is located above the template 1, that is, the arrangement order of the components on the frame from top to bottom is: needle magazine locking unit 2, working needle locking unit 3, and template 1.

[0025] like Figure 2 and Figure 3 As shown, the template 1 is mounted on the template mounting plate 11. The template 1 has multiple through holes, where the through holes correspond to the ejector pins that need to be retained are through holes, and the ejector pins that need to be removed are sealed by diaphragms. The template mounting plate 11 has multiple guide pin holes 12, each corresponding to one of the through holes in the template 1. The needle magazine locking plate 21 and the working locking plate 31 each have several locking holes.

[0026] The needle magazine locking unit 2 is disposed above the template 1 and is used to lock and release the ejector pin. The needle magazine locking unit 2 includes a needle magazine locking plate 21 and a needle magazine support plate 22. The needle magazine locking plate 21 is disposed above the needle magazine support plate 22, and the needle magazine support plate 22 is provided with a plurality of guide pin through holes 23 of equal diameter.

[0027] The working pin locking unit 3 includes a working pin locking plate 31 and a working support plate, with the working support plate positioned below the working pin locking plate 31. Both the pin magazine pin locking plate 21 and the working pin locking plate 31 have a plurality of pin locking holes, and each is equipped with its own longitudinal push drive component. The pin locking method of the pin magazine pin locking plate 21 can be either magnetic or mechanical: when using magnetic locking, the pin locking hole matches the size of the mounting part of the ejector pin, the mounting part of the ejector pin is assembled within the pin locking hole, and is magnetically fixed to the pin magazine pin locking plate 21. When using mechanical locking, the pin magazine pin locking plate 21 has teardrop-shaped pin locking holes, each including a long diameter portion corresponding to the guide pin through hole 23 and a short diameter portion that provides locking. The needle magazine locking plate 21 is movably connected to the needle magazine support plate 22. An independent longitudinal push drive unit propels the needle magazine locking plate 21 longitudinally relative to the needle magazine support plate 22. When the short diameter portion of the locking hole aligns with the guide needle through hole 23, the ejector pin is locked. The working locking plate 31 is also movably connected to the working locking plate 32. Another longitudinal push drive unit propels the working locking plate 31. Its locking method is similar to that of the needle magazine locking plate 21 and will not be repeated. The working locking unit 3 differs from the needle magazine locking unit 2 in that the working support plate is equipped with several guide holes I 33. These guide holes I 33 are stepped holes with a T-shaped longitudinal section to prevent the working ejector pin from dislodging from below the working support plate, ensuring stable locking. The longitudinal push drive unit can be a cylinder or other linear drive unit.

[0028] The self-falling plate changing device has at least two states: a long-distance assembly state and a short-distance changing state between the needle magazine locking unit 2 and the template 1. In the long-distance assembly state, the needle magazine locking unit 2 is filled with pins, the lower ends of which are suspended above the template 1. The vertical distance between the pins and the template 1 is the initial distance. At this time, the template mounting plate 11 is far from the locking plate assembly, facilitating the installation of the template 1. In the short-distance changing state, the vertical distance between them is a buffer distance, meaning the needle magazine locking unit 2 and the template mounting plate 11 are relatively close together, and the vertical distance between the pins and the template 1 is the buffer distance. The buffer distance is smaller than the initial distance. Whether in the long-distance assembly state or the short-distance changing state, the pins are positioned above the template 1. The buffer distance can be equal to 0, allowing the lower ends of the pins to contact the template 1, further reducing the impact of the falling pins; or it can be greater than 0 to eliminate the influence of pin length tolerances. Furthermore, those skilled in the art can adjust the size of the buffer distance according to the thickness of the template 1, therefore the buffer distance is not specifically described here, but it is necessarily smaller than the initial distance.

[0029] The lifting drive unit 5 is used to drive the needle magazine locking unit 2 and the template 1 to move closer together, so that they can switch from a remote assembly state to a close-range template changing state. There are several ways for the needle magazine locking unit 2 and the template 1 to move closer together. For example, the lifting drive unit 5 is connected to the template mounting plate 11 to drive the template 1 to move up and down relative to the needle magazine locking unit 2. That is, the template mounting plate 11 drives the template 1 to move up and down, so as to achieve the relative closeness between the template 1 and the needle magazine locking unit 2. For example, the lifting drive unit 5 is connected to the needle magazine locking unit 2 to drive the needle magazine locking unit 2 to move up and down relative to the template 1. In this embodiment, the needle magazine locking unit 2 and the working locking unit 3 are respectively mounted on the movable base 7. The needle magazine locking unit 2 is located at the top of the movable base 7, and the working locking unit 3 is located at the bottom of the movable base 7. The lifting drive unit 5 is connected to the movable base 7 to drive the needle magazine locking unit 2 and the working locking unit 3 to move up and down synchronously relative to the template 1. The template mounting plate 11 can be fixedly mounted on the frame, or as shown in the attached figure. Figure 1 or Figure 3 As shown, the template mounting plate 11 can be connected to the movable seat 7 via guide columns. Initially, the lifting drive unit 5 can drive the movable seat 7, needle magazine locking unit 2, working needle locking unit 3, and template mounting plate 11 to descend together. When the template mounting plate 11 is blocked by the material placement platform 8 of the product handling machine, the movable seat 7 continues to drive the needle magazine locking unit 2 and working needle locking unit 3 to move down along the guide columns, thereby approaching the template 1 and entering a close-range adjustment state. This structure eliminates the need for a separate plate changing station, reducing the equipment's footprint. The lifting drive unit 5 can be a screw drive unit or a linear drive structure of a cylinder.

[0030] The following is in conjunction with the appendix Figure 1-4 The working principle and process are described below: Initially, the device is in a remote assembly state: the needle magazine locking unit 2 locks all the ejector pins, with the lower ends of the ejector pins suspended above the template 1, and there is a large initial gap between the lower ends of the ejector pins and the template 1. The long diameter portion of the locking hole of the working locking plate 31 is aligned with the guide hole I 33, ready to receive the working ejector pin.

[0031] The plate changing process: The lifting drive unit 5 drives the needle magazine locking unit 2 to descend or the template mounting plate 11 to rise, causing the needle magazine locking unit 2 to move closer to the template mounting plate 11 until the distance between the lower end of the ejector pin and the template 1 reaches the buffer distance, entering the close-range plate adjustment state. Subsequently, the longitudinal push drive of the needle magazine locking unit 2 actuates, aligning the long diameter portion of the locking pin hole with the guide pin through hole 23 of the needle magazine support plate 22, releasing all ejector pins. The ejector pins fall freely within a very short buffer distance. Because the distance between the lower end of the ejector pin and the template 1 is shortened, the impact force on the diaphragm is reduced, thus allowing the use of a thinner diaphragm, or even a paper sheet.

[0032] Ejector selection and locking: After the ejector released from the needle magazine locking unit 2 falls freely, it contacts the template 1. The ejector that passes through the template 1 becomes a working ejector and falls into the T-shaped step hole of the working locking needle support plate 32 and is supported by it; the remaining ejector is blocked by the solid part of the template 1 and becomes a standby ejector.

[0033] If the buffer gap is greater than 0, the lifting drive unit 5 will continue to drive the moving seat 7 to move down a certain distance (this distance is equal to the buffer gap), so that the standby ejector pin re-enters the needle magazine locking unit 2, ensuring that the upper end of the blocked ejector pin re-enters the locking hole area of ​​the needle magazine locking plate 21. If the buffer gap is 0, the moving seat 7 does not need to descend a second time.

[0034] Locking of each ejector pin: The longitudinal push drive of the needle magazine locking unit 2 drives the needle magazine locking plate 21 to translate, relocking the ejector pin blocked by the template 1 back into the needle magazine. The working ejector pin is retained in the T-shaped stepped hole of the working support plate. The working locking plate 31 translates and is locked by the locking hole of the working locking plate 31 for subsequent product retrieval.

[0035] The ejector pin can be reset by placing a solid plate (a plate without through holes) under the working ejector pin. The needle magazine locking unit 2 and the working locking unit 3 are opened, and the needle magazine locking unit 2 moves down to receive the working ejector pin that is pushed up by the solid plate. Example 2

[0036] The difference from Embodiment 1 is that the working locking pin unit 3 is located below the template 1. See also... Figure 5 and Figure 8 The working support plate is provided with a plurality of guide holes II 34, which are through holes of equal diameter. A base plate 36 without pinholes is provided below the working locking pin unit 3, which is used to ensure that the working pin remains in the working locking pin unit 3.

[0037] The following is in conjunction with the appendix Figure 5-8 Describing the working principle, in the remote assembly state: all ejector pins are locked within the ejector pin plate assembly of the pin magazine, with the lower ends of the ejector pins suspended above the template 1, and a large initial distance between them. The long diameter portion of the locking pin hole of the working locking pin plate 31 is aligned with the guide hole II 34, ready to receive the working ejector pin.

[0038] The changing plate dropping process: The lifting drive unit 5 drives the needle magazine locking unit 2 to descend or the template mounting plate 11 to rise, causing the needle magazine locking unit 2 to move closer to the template mounting plate 11, reducing the distance between the lower end of the ejector pin and the template 1 to a buffer distance, thus entering the close-range changing plate state. The longitudinal push drive component of the needle magazine locking unit 2 drives the needle magazine locking plate 21 to move horizontally, releasing all ejector pins, allowing the ejector pins to fall freely under the action of gravity.

[0039] Until the template 1 comes into contact with the working locking needle plate 31, the needle magazine locking needle plate 21 continues to descend, so that the needle magazine locking needle plate 21 and the template 1 enter the close-range plate changing state.

[0040] Selection and locking of ejector pins: The ejector pins fall and contact the template 1. The working ejector pins that pass through the template 1 pass through the guide hole I 33 of the working support plate below and are blocked and limited by the bottom plate 36. The ejector pins blocked by the template 1 are standby ejector pins.

[0041] Locking of each ejector pin: If the buffer gap is greater than 0, the needle magazine locking unit 2 and the template mounting plate 11 must continue to move closer to each other before locking, so that the standby ejector pins that are separated from the buffer gap from the needle magazine locking unit 2 re-enter the needle magazine locking unit 2, so that the standby ejector pins can be re-locked by the needle magazine locking plate 21. In addition, the needle magazine locking plate 21 translates to lock the blocked ejector pins.

[0042] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A self-falling plate changing device, comprising a template (1), characterized in that: It also includes a needle magazine locking unit (2), a working locking unit (3), and a lifting drive unit (5); The needle magazine locking unit (2) is positioned above the template (1); The working locking needle unit (3) is located below the needle magazine locking needle unit (2), and the working locking needle unit (3) is used to lock the working pin that passes through the template (1); The needle magazine locking unit (2) and the template (1) have a long-distance assembly state and a short-distance replacement state; in the long-distance assembly state, the needle magazine locking unit (2) is full of pins, and the vertical distance between the pins and the template (1) is the initial distance; in the short-distance replacement state, the vertical distance between the two is the buffer distance, and the buffer distance is smaller than the initial distance. The lifting drive unit (5) is used to drive the needle magazine locking unit (2) and the template (1) to move closer together so that the two can switch from a remote assembly state to a close-range template changing state. When the needle magazine locking unit (2) is in the close-range plate changing state, it releases all the ejector pins, and the ejector pins fall freely. The template (1) blocks some of the ejector pins, which are then locked back by the needle magazine locking unit (2). The remaining ejector pins pass through the template (1) to become working ejector pins and are locked by the working locking unit (3).

2. The self-falling plate changing device according to claim 1, characterized in that: The template (1) is installed on the template (1) mounting plate. The lifting drive unit (5) is connected to the template (1) mounting plate to drive the template (1) to move up and down relative to the needle magazine locking unit (2).

3. The self-falling plate changing device according to claim 1, characterized in that: The lifting drive unit (5) is connected to the needle magazine locking unit (2) to drive the needle magazine locking unit (2) to move up and down relative to the template (1).

4. The self-falling plate changing device according to claim 3, characterized in that: The working locking needle unit (3) is set above the template (1), the needle magazine locking needle unit (2) and the working locking needle unit (3) are respectively set on the moving seat (7), and the lifting drive unit (5) is connected to the moving seat (7) to drive the needle magazine locking needle unit (2) and the working locking needle unit (3) to move up and down synchronously relative to the template (1).

5. The self-falling plate changing device according to claim 1, characterized in that: The working locking pin unit (3) is located below the template (1), and a base plate (36) without pinholes is provided below the working locking pin unit (3). The base plate (36) is used to ensure that the working pin remains in the working locking pin unit (3).

6. The self-falling plate changing device according to claim 4 or 5, characterized in that: The needle magazine locking unit (2) includes a needle magazine locking plate (21) and a needle magazine support plate (22). The needle magazine locking plate (21) is located above the needle magazine support plate (22). The needle magazine support plate (22) has a plurality of guide needle through holes (23) of equal diameter. The working locking pin unit (3) includes a working locking pin plate (31) and a working support plate, wherein the working support plate is disposed below the working locking pin plate (31); The needle magazine locking plate (21) and the working locking plate (31) are respectively provided with a number of locking holes, and the needle magazine locking plate (21) and the working locking plate (31) are respectively equipped with their own longitudinal push drive components.

7. The self-falling plate changing device according to claim 6, characterized in that: When the working locking pin unit (3) is set above the template (1), the working support plate is provided with a number of guide holes I (33), and the guide holes I (33) are stepped holes with a T-shaped longitudinal section.

8. The self-falling plate changing device according to claim 6, characterized in that: When the working locking pin unit (3) is set below the template (1), the working support plate is provided with a number of guide holes II (34), and the guide holes II (34) are through holes of equal diameter.

9. The self-falling plate changing device according to claim 1, characterized in that: The buffer spacing is equal to 0, or the buffer spacing is greater than 0.

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