Lower die limiting mechanism

Abstract

The utility model provides a lower die limiting mechanism, and belongs to the technical field of die accessories. Comprising a driving part and a limiting part, the driving part is installed on a machine base, the limiting part is located on one side of a lower die bottom plate and movably connected with the machine base, the driving end of the driving part is connected with one end of the limiting part, the driving part is used for driving the limiting part to move, and a gap is reserved between the bottom of the other end of the limiting part and the upper end of the lower die bottom plate. According to the technical scheme, the limiting piece capable of movably changing the position moves to the position above the lower die bottom plate for limiting according to the technological process, the fault that the lower die is taken up abnormally is eliminated, the energy consumption loss is reduced, and the production efficiency is improved; potential safety hazards caused by the fact that workers enter the press machine to conduct fault repair are avoided, and safety of the workers is guaranteed to the maximum degree.

Description

Technical Field

[0001] The utility model relates to the technical field of mold accessories, in particular to a lower mold limiting mechanism. Background Art

[0002] In the production process of IMG (In Mold GRAINING) process, the mold needs to be opened and closed periodically in the vertical direction. However, when the mold is opened, only the upper mold rises, and the lower mold must remain on the machine base. In order to prevent the lower mold from being lifted up by the upper mold when the mold is opened, a fixed mechanical limit hook is set. In order to facilitate the placement of parts, the lower mold is also set to lift up (vertical stroke of about 45mm), move out (horizontal stroke of about 2200mm), move in, and fall. There must be a gap of about 60-100mm between the limit hook and the bottom plate of the lower mold in the vertical direction to ensure that the lower mold has enough space to lift up. However, due to the existence of the gap, the limit hook cannot really limit the lower mold on the bottom plate of the machine, and the limiting and protection effect of the lower mold is not particularly ideal. In abnormal situations, the lower mold will still be lifted up. When the lower mold is lifted up to a height that contacts the limit hook, the lower mold will be forced to separate from the upper mold and fall freely to the bottom plate of the machine. The state of the lower mold after falling is also unpredictable, which causes great damage to the mold. In addition, when dealing with this kind of abnormality, personnel need to enter the press, which poses a great threat to safety.

[0003] Chinese patent CN201911018407.6 discloses a pneumatic limit mechanism for an automobile stamping die, including an upper die seat, a lower die seat, a positioning column and a pneumatic limit assembly. A lower die seat is installed on the lower side of the upper die seat, a positioning column is installed at the connection between the upper die seat and the lower die seat, and pneumatic limit assemblies are arranged on both sides of the lower die seat; the pneumatic limit assembly performs a limiting effect by moving the limit block to match it with the limit groove of the upper die seat, and the limiting effect is for limiting the die, and cannot be used to limit the lower die alone;

[0004] Chinese patent CN202321909958.3 discloses an upper mold anti-dropping mechanism, including a base, a driving member and a pin shaft. The base is fixedly mounted on the bottom of the upper mold plate, the driving member is mounted on the base, and the output end of the driving member is connected to the pin shaft. It can be used to fix the upper mold to the upper mold plate to prevent the upper mold from falling, but cannot be used to limit the lower mold.

[0005] In summary, the existing technology cannot solve the problem of properly limiting the lower mold, and the lower mold is easily lifted up. A device is needed to solve the above problem. Utility Model Content

[0006] In order to overcome at least one of the above technical problems, the utility model provides a lower die limiting mechanism. The technical solution of the utility model is as follows: a lower die limiting mechanism comprises a driving member and a limiting member, wherein the driving member is mounted on a machine base, and the limiting member is located on one side of the lower die bottom plate.

[0007] The limiting member is movably connected to the machine base, the driving end of the driving member is connected to one end of the limiting member, the driving member is used to drive the limiting member to move, and a gap is left between the bottom of the other end of the limiting member and the upper end of the lower mold bottom plate.

[0008] Preferably, the height of the gap is 1 mm.

[0009] Preferably, the limiting member comprises a sliding seat and a limiting insert, and the lower end of the sliding seat is slidably connected to the machine base.

[0010] The limiting insert is installed on one side of the sliding seat close to the lower mold bottom plate, and the other side of the sliding seat is connected to the driving end of the driving member. A gap is left between the lower end of the limiting insert and the upper end of the lower mold bottom plate.

[0011] Preferably, the limiting insert includes a fixed limiting insert and a replaceable limiting insert, the fixed limiting insert is fixedly connected to the sliding seat, the upper end of the replaceable limiting insert is movably connected to the fixed limiting insert, and a gap is left between the lower end of the replaceable limiting insert and the upper end of the lower mold bottom plate.

[0012] Preferably, the fixed limiting insert and the replaceable limiting insert are connected by fastening bolts.

[0013] Preferably, a wedge-shaped groove is formed at the bottom of the fixed limiting insert, and a wedge-shaped block adapted to the wedge-shaped groove is installed at the upper end of the replaceable limiting insert.

[0014] Preferably, the machine base is provided with a strip-shaped through groove, and the lower end of the sliding seat is slidably connected to the strip-shaped through groove via an inverted T-shaped sliding block.

[0015] Preferably, the machine base is provided with a circular through hole connected to the strip-shaped through groove, and the diameter of the circular through hole is greater than the length of the inverted T-shaped sliding block.

[0016] Preferably, a vertical slide groove is provided on a side of the sliding seat close to the driving member, and a connecting block is installed on the driving end of the driving member, and the connecting block is slidably connected to the vertical slide groove.

[0017] Preferably, the fixed end of the driving member is fixedly connected to the machine base via a fixing plate.

[0018] Preferably, it also includes a control system, which includes a limit state detector, a controller and a touch display screen, the controller is electrically connected to the limit state detector, the touch display screen and the driving member, respectively, the limit state detector is used to detect whether the driving member is extended or retracted, and the controller is used to control the operation of the driving member.

[0019] Compared with the prior art, the beneficial effects of the technical solution of the utility model are: the utility model provides a lower die limiting mechanism,

[0020] 1. The position-limiting parts can be moved to the top of the bottom plate of the lower die according to the process flow to limit the position, thus eliminating the fault of the lower die being lifted by an abnormality, reducing energy consumption and improving production efficiency; avoiding the safety hazards caused by personnel entering the press to repair the fault, and ensuring the safety of personnel to the greatest extent.

[0021] 2. Without affecting the movement of the mold, the lower mold is limited in a timely and reliable manner. After the upper and lower molds are truly and safely separated, the limit parts are retracted to effectively protect the mold.

[0022] 3. The limiter does not contact the bottom plate of the lower die, leaving a gap, and does not limit the automatic correction of the position of the lower die, providing a reference for similar application scenarios in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly structure of the machine base and the lower mold;

[0024] Figure 2 This is a schematic diagram of the assembly structure of the lower die limiting mechanism and the machine base of the utility model;

[0025] Figure 3 Another structural diagram of the assembly of the lower die limiting mechanism and the machine base of the utility model;

[0026] Figure 4 This is a schematic diagram of the front view structure of the assembly of the lower die limiting mechanism and the machine base of the utility model;

[0027] Figure 5 This is a schematic diagram of the side view of the assembly of the lower die limiting mechanism and the machine base of the utility model;

[0028] Figure 6 This is a schematic diagram of the wedge-shaped cooperation between the fixed limiting insert and the replaceable limiting insert of the utility model;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the sliding seat of the utility model;

[0030] Figure 8 This is a schematic diagram of the slotted structure of the machine base of the utility model;

[0031] Fig. 9 It is a schematic diagram of the lower die release state when the lower die limiting mechanism is away from the lower die;

[0032] Fig.10 It is a schematic diagram of the lower die limiting state when the lower die limiting mechanism is close to the lower die;

[0033] Fig.11 It is a schematic diagram of the arrangement state of multiple lower mold limiting mechanisms in one embodiment of the utility model;

[0034] Among them: 100, machine base; 200, lower mold bottom plate; 300, lower mold;

[0035] 1. Driving member; 2. Limiting member; 3. Strip through groove; 4. Circular through hole; 5. Connecting block; 6. Fixed plate; 201. Sliding seat; 202. Limiting insert; 2011. T-shaped slider; 2012. Vertical slide groove; 2021. Fixed limiting insert; 2022. Replaceable limiting insert. DETAILED DESCRIPTION

[0036] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Technologies, methods, and devices known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be considered part of the authorization specification. In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; nor do they indicate the importance of components, and therefore cannot be understood as limiting the present invention.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

[0038] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Embodiment 1:

[0040] refer to Figure 1-10 As shown, a lower mold limiting mechanism includes a driving member 1 and a limiting member 2. The driving member 1 is installed on a machine base 100, and the limiting member 2 is located on one side of the lower mold bottom plate 200.

[0041] The limiting member 2 is movably connected to the machine base 100 , the driving end of the driving member 1 is connected to one end of the limiting member 2 , the driving member 1 is used to drive the limiting member 2 to move, and a gap is left between the bottom of the other end of the limiting member 2 and the upper end of the lower mold bottom plate 200 .

[0042] refer to Figure 1 As shown, the lower mold 300 is located on the machine base 100. The mold needs to be opened and closed periodically in the vertical direction. However, when the mold is opened, only the upper mold is not shown to rise in the figure. The lower mold 300 must remain on the machine base 100. In order to prevent the lower mold 300 from being lifted by the upper mold when the mold is opened, the lower mold limiting mechanism of the present application is adopted.

[0043] Specifically, the driving member 1 provided on the machine base 100 and the limiting member 2 movably connected to the machine base 100 are used as reference before the mold is opened. Fig.10 As shown, the driving member 1 drives the limiting member 2 to move a certain stroke toward the lower mold 300 and move it to above the end of the lower mold bottom plate 200. Then, the limiting member 2 can limit the lower mold bottom plate 200 when the mold is opened, thereby limiting the lower mold 300 to prevent the lower mold 300 from being lifted by the upper mold when the mold is opened. In addition, the limiting member 2 is used to limit the lower mold bottom plate 200, which can reduce the impact on the lower mold 300. It should be noted that when there is a lower mold of other prior art, the bottom of the limiting member 2 can also be set above other parts of the lower mold to achieve the limitation of the lower mold. Fig.11As shown, when the upper mold is raised to a certain height and it is confirmed that the upper and lower molds are truly safely separated, after the mold opening is completed, the driving member 1 drives the limiting member 2 away from the lower mold bottom plate 200, so that the lower mold 300 is in a released state and is no longer limited, and does not affect the subsequent lifting and removal actions of the lower mold.

[0044] When the bottom of the limit member 2 of the present application is located above the lower mold base plate 200, a gap is left with the lower mold base plate 200. The purpose is: when the mold is closed, in order to ensure a uniform gap within the mold, the lower mold 300 automatically completes the position correction under the action of the upper mold guide column to achieve precise alignment with the upper mold. Therefore, a gap is left between the limit member 2 and the lower mold base plate 200 to prevent the contact with the lower mold base plate 200 to limit the position of the lower mold 300 and automatically correct the deviation, so as to prevent the lower mold base plate 200 from being stuck, resulting in strain on the upper mold guide column or even damage to the mold.

[0045] In a further embodiment, the driving member 1 adopts a telescopic device such as a telescopic cylinder, an electric telescopic rod, etc.

[0046] In a further embodiment, reference is made to Fig.10 As shown, the height of the gap is 1 mm; this can of course be adjusted according to the specifications of the mold.

[0047] Embodiment 2:

[0048] refer to Figure 2 As shown, the limiting member 2 includes a sliding seat 201 and a limiting insert 202. The lower end of the sliding seat 201 is slidably connected to the machine base 100.

[0049] The limiting insert 202 is installed on one side of the sliding seat 201 close to the lower mold bottom plate 200 , and the other side of the sliding seat 201 is connected to the driving end of the driving member 1 . A gap is left between the lower end of the limiting insert 202 and the upper end of the lower mold bottom plate 200 .

[0050] When the driving member 1 drives the limiting member 2 to move, specifically, the driving end of the driving member 1 pushes the lower end of the sliding seat 201 to slide relative to the machine base 100, thereby driving the limiting insert 202 to move above the lower mold bottom plate 200 to limit the lower mold bottom plate 200; similarly, the limiting member 2 drives the sliding seat 201 and the limiting insert 202 away from the lower mold bottom plate 200, and no longer plays a limiting role on the lower mold 300.

[0051] In a further embodiment, reference is made to Figure 2-5 As shown, the limit insert 202 includes a fixed limit insert 2021 and a replaceable limit insert 2022. The fixed limit insert 2021 is fixedly connected to the sliding seat 201, the upper end of the replaceable limit insert 2022 is movably connected to the fixed limit insert 2021, and a gap is left between the lower end of the replaceable limit insert 2022 and the upper end of the lower mold base plate 200.

[0052] The position of the limit insert 202 is located by fixing the limit insert 2021 and the sliding seat 201, and then the lower mold base plate 200 is limited in combination with the replaceable limit insert 2022; and the replaceable limit insert 2022 can be manufactured in different heights to adapt to different mold sizes to ensure the gap between the lower end of the replaceable limit insert 2022 and the upper end of the lower mold base plate 200, such as the replaceable limit insert 2022 with a height of 20mm, 25mm or 30mm.

[0053] In a further embodiment, reference is made to Figure 6 As shown, a wedge-shaped groove is provided at the bottom of the fixed limiting insert 2021, and a wedge-shaped block adapted to the wedge-shaped groove is installed at the upper end of the replaceable limiting insert 2022. Through the wedge-shaped fit, the fit accuracy and reliability are increased.

[0054] In a further embodiment, reference is made to Figure 2-8 As shown, the machine base 100 is provided with a strip through groove 3, and the lower end of the sliding seat 201 is slidably connected to the strip through groove 4 through an inverted T-shaped slider 2011. The inverted T-shaped slider 2011 is adapted to the strip through groove 3 for sliding, and the bottom of the inverted T-shaped slider 2011 is located below the strip through groove 4, which plays the effect of clamping the machine base 100 with the sliding seat 201 for movement, and the sliding is more stable.

[0055] In a further embodiment, reference is made to Figure 2-8 As shown, the machine base 100 is provided with a circular through hole 4 connected to the strip through groove 3, and the diameter of the circular through hole 4 is larger than the length of the inverted T-shaped slider 2011. The circular through hole 4 is provided to facilitate the inverted T-shaped slider 2011 to be inserted into the circular through hole 4 and then moved into the strip through groove 3 for connection, so as to facilitate the replacement of the damaged sliding seat 201.

[0056] In a further embodiment, reference is made to Figure 2-7 As shown, a vertical slide groove 2012 is provided on one side of the sliding seat 201 close to the driving member 1, and a connecting block 5 is installed on the driving end of the driving member 1. The connecting block 5 is slidably connected to the vertical slide groove 2012, and the connecting block 5 is adapted to the vertical slide groove 2012. During installation, the vertical slide groove 2012 on the back side of the sliding seat 201 is aligned with the connecting block 5, and then moved downward to a fixed position, and the connecting block 5 is connected to the vertical slide groove 2012 to realize the connection between the sliding seat 201 and the driving end of the driving member 1, so that the sliding seat 201 can be replaced when it is damaged, or a sliding seat 201 of different specifications can be replaced.

[0057] In a further embodiment, reference is made to Figure 3 As shown, the fixed end of the driving member 1 is fixedly connected to the machine base 100 via a fixing plate 6 to reinforce the fixed end of the driving member 1 .

[0058] Embodiment 3:

[0059] On the basis of the foregoing embodiment, a control system is also included, which includes a limit state detector, a controller and a touch display screen. The controller is electrically connected to the limit state detector, the touch display screen and the drive member 1 respectively. The limit state detector is used to detect whether the drive member 1 is extended or retracted, and the controller is used to control the operation of the drive member 1.

[0060] The limit state detector is used to detect whether the driving member 1 is extended. If it is extended, it means that the limit member 2 is driven to the top of the lower mold bottom plate 200, completing the limit of the lower mold 300. If it is in a retracted state, the lower mold 300 is not limited. The detection information is transmitted to the controller, and the information is transmitted to the touch screen for display. According to the processing process, the control signal can be input to the controller through the touch screen, and the controller controls the driving member 1 to operate, so as to extend or retract, to change the position of the limit member 2, and limit or not limit the lower mold 300; it can also be coordinated with the action sequence of the process production, and automatically controlled, so that the lower mold protection mechanism limits and releases the lower mold according to the required time period. It should be noted that the limit state detector, controller and touch screen can adopt the existing technology devices, which can achieve the above effects.

[0061] Embodiment 4:

[0062] refer to Fig.11 As shown, according to the design of the lower mold base plate 200 to avoid air, four lower mold limiting mechanisms are symmetrically arranged. In addition to being used together, they can also be defined as a group of two diagonally located ones according to actual needs; for example, the upper left corner and the lower right corner are a group to achieve limit protection during the production of mold A. During the production of mold A, this group of lower mold limiting mechanisms performs limit protection on the lower mold; the other diagonally located group, a group at the lower left corner and the upper right corner, are used for limit protection during the production of mold B with a specification different from that of mold A. They are controlled by a grouped control system, which not only ensures the protection effect of the lower mold limit, but also improves the production flexibility of the lower mold limiting mechanism.

[0063] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A lower die limiting mechanism, characterized in that: The machine comprises a driving member (1) and a limiting member (2), wherein the driving member (1) is mounted on a machine base (100), and the limiting member (2) is located on one side of a lower mold base plate (200). The limiting member (2) is movably connected to the machine base (100); the driving end of the driving member (1) is connected to one end of the limiting member (2); the driving member (1) is used to drive the limiting member (2) to move; and a gap is left between the bottom of the other end of the limiting member (2) and the upper end of the lower mold bottom plate (200).

2. A lower die limiting mechanism according to claim 1, characterized in that: The height of the gap is 1 mm.

3. A lower die limiting mechanism according to claim 1, characterized in that: The limiting member (2) comprises a sliding seat (201) and a limiting insert (202), wherein the lower end of the sliding seat (201) is slidably connected to the machine base (100). The limiting insert (202) is installed on one side of the sliding seat (201) close to the lower mold bottom plate (200), and the other side of the sliding seat (201) is connected to the driving end of the driving member (1). A gap is left between the lower end of the limiting insert (202) and the upper end of the lower mold bottom plate (200).

4. A lower die limiting mechanism according to claim 3, characterized in that: The limiting insert (202) comprises a fixed limiting insert (2021) and a replaceable limiting insert (2022); the fixed limiting insert (2021) is fixedly connected to the sliding seat (201); the upper end of the replaceable limiting insert (2022) is movably connected to the fixed limiting insert (2021); and a gap is left between the lower end of the replaceable limiting insert (2022) and the upper end of the lower mold bottom plate (200).

5. A lower die limiting mechanism according to claim 4, characterized in that: The bottom of the fixed limiting insert (2021) is provided with a wedge-shaped groove, and the upper end of the replaceable limiting insert (2022) is provided with a wedge-shaped block adapted to the wedge-shaped groove.

6. A lower die limiting mechanism according to claim 3, characterized in that: The machine base (100) is provided with a strip-shaped through groove (3), and the lower end of the sliding seat (201) is slidably connected to the strip-shaped through groove (3) via an inverted T-shaped sliding block (2011).

7. A lower die limiting mechanism according to claim 6, characterized in that: The machine base (100) is provided with a circular through hole (4) connected to the strip-shaped through groove (3), and the diameter of the circular through hole (4) is greater than the length of the inverted T-shaped sliding block (2011).

8. A lower die limiting mechanism according to claim 3, characterized in that: A vertical slide groove (2012) is provided on a side of the sliding seat (201) close to the driving member (1), and a connecting block (5) is installed on the driving end of the driving member (1), and the connecting block (5) is slidably connected to the vertical slide groove (2012).

9. A lower die limiting mechanism according to claim 1, characterized in that: The fixed end of the driving member (1) is fixedly connected to the machine base (100) via a fixed plate (6).

10. A lower die limiting mechanism according to any one of claims 1 to 9, characterized in that: The device also includes a control system, which includes a limit state detector, a controller and a touch display screen, wherein the controller is electrically connected to the limit state detector, the touch display screen and the drive member (1) respectively, the limit state detector is used to detect whether the drive member (1) is extended or retracted, and the controller is used to control the operation of the drive member (1).

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