A drawbench for controlling the sequence of forward and backward die sinking

Abstract

The utility model discloses a kind of for controlling front and rear mould oblique extraction sequence, wherein front and rear mould includes the fixed mould seat plate, fixed mould, movable mould and support plate arranged in sequence, and be located in the oblique extraction mechanism of fixed mould and movable mould, first connecting piece and second connecting piece with each other are inserted into cooperation respectively on the side wall of at least one corresponding of fixed mould seat plate and support plate, movable mould side wall is provided with telescopic first clamping block and second clamping block, both are arranged along up-down direction, and located the movement track of first connecting piece and second connecting piece insertion or separation, during mould opening, through the cooperation of first connecting piece and second connecting piece, and the orderly linkage between them and first clamping block, second clamping block, the core pulling action sequence of oblique extraction mechanism is accurately controlled, oblique core and mould cavity or product interference is effectively avoided, so that the phenomenon of possible stamping during mould opening and mould closing is completely eliminated, the safety and reliability of mould operation are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a fastening machine for controlling the oblique pulling sequence of the front and rear molds. Background Technology

[0002] In the field of plastic molds, products with undercut structures typically require the use of angled core-pulling mechanisms (also known as angled ejectors or sliders) for molding. To ensure smooth demolding, the angled core-pulling mechanism must exit first during mold opening, and then reset before mold closing. Otherwise, interference and collisions will occur between the moving mold components and the angled core-pulling mechanism, commonly known as "mold collision." Mold collisions can result in minor issues such as flash or dimensional defects in the product, or even serious damage to expensive angled core-pulling mechanisms, ejector pins, or cavities, causing significant economic losses and production downtime for repairs. Utility Model Content

[0003] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a fastening mechanism for controlling the oblique pulling sequence of the front and rear molds, which solves the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fastening mechanism for controlling the oblique pulling sequence of the front and rear molds, wherein the front and rear molds include a fixed mold base plate, a fixed mold, a moving mold and a support plate arranged sequentially, and an oblique pulling mechanism provided in the fixed mold and the moving mold. At least one corresponding side wall of the fixed mold base plate and the support plate is provided with a first connecting member and a second connecting member that can be inserted and cooperated with each other. The side wall of the moving mold is provided with a retractable first locking block and a second locking block. The two are arranged in the vertical direction and are located on the movement trajectory of the first connecting member and the second connecting member being inserted or separated. The first connector has a first guide groove that can drive the first and second blocks to retract into the moving mold, and the second connector has a second guide groove that can push the first block to retract into the moving mold.

[0005] Furthermore, the moving mold sidewall has two storage slots that respectively accommodate the first card block and the second card block. Each storage slot is provided with a first elastic element, and the first card block and the second card block are respectively connected to the first elastic element in the corresponding storage slot.

[0006] Furthermore, the protruding ends of the first and second blocks have inclined surfaces on their upper parts.

[0007] Furthermore, the width of the second connector is greater than that of the first connector, and the first connector is inserted into the middle of the second connector. The two sides of the first and second blocks extend toward the two sides of the second connector, respectively.

[0008] Furthermore, the first guide groove includes a connecting groove for accommodating the first card block and a cut-out for pushing the second card block to move. The cut-out is located below the connecting groove and is arranged vertically with the connecting groove along the radial direction of the first connector. The shape of the top of the inner cavity of the cut-out is adapted to the inclined surface on the second card block.

[0009] Furthermore, the second guide groove is provided on both sides of the second connector, and the shape of the top of the inner cavity of the second guide groove is adapted to the inclined surface on the first card block.

[0010] Furthermore, at least one side wall of the fixed mold is provided with a fixing plate, which has two through-holes. Movable push rods and stop rods are respectively inserted into the two through-holes, and the push rods and stop rods are respectively connected to the fixed mold base plate and the support plate.

[0011] Furthermore, movable connecting blocks are inserted into the two ports, and a second elastic element connected to the connecting block is provided in the port corresponding to the push rod.

[0012] Furthermore, the connecting block is concave, and both the inner and outer sidewalls of the connecting block are provided with inclined surfaces.

[0013] Furthermore, a contact part is provided on one side of the stop bar, and inclined surfaces are provided at both the upper and lower ends of the contact part. The inclined surfaces are adapted to the inclined surfaces on the outer side wall of the connecting block. An inclined surface is also provided at the top of the push rod, and the inclined surface is adapted to the inclined surfaces on the inner side wall of the connecting block.

[0014] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, during the mold opening process, through the coordination of the first connecting piece and the second connecting piece, and the orderly linkage between them and the first and second locking blocks, the core pulling action sequence of the inclined core pulling mechanism is precisely controlled, effectively avoiding interference between the inclined core pulling and the mold cavity or product, thereby completely eliminating the possible mold collision phenomenon during the mold opening and closing process, and ensuring the safety and reliability of mold operation.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

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

[0017] Figure 2 This is a first-view cross-sectional view of Embodiment 1 of this utility model.

[0018] Figure 3 This is a diagram illustrating the first connector of Embodiment 1 of this utility model.

[0019] Figure 4This is a cross-sectional view from a second perspective of Embodiment 1 of this utility model.

[0020] Figure 5 This is a cross-sectional view of the fixing plate of Embodiment 1 of this utility model.

[0021] Explanation of reference numerals in the attached diagram: Fixed mold base plate 10, first connecting piece 11, first guide groove 111, connecting groove 1111, cut 1112; Fixed mold 20, fixed plate 21, through opening 22, push rod 23, stop rod 24, contact part 241, connecting block 25, second elastic element 26; Moving mold 30, first locking block 31, second locking block 32, storage slot 33, first elastic element 34; Support plate 40, second connector 41, second guide groove 411; 50. Inclined extraction mechanism. Detailed Implementation

[0022] Please refer to Figure 1-5 As shown, it illustrates the specific structure of a preferred first embodiment of the present invention, which is a fastening mechanism for controlling the oblique pulling sequence of the front and rear molds. The front and rear molds include a fixed mold base plate 10, a fixed mold 20, a moving mold 30, and a support plate 40 arranged sequentially, as well as an oblique pulling mechanism 50 disposed in the fixed mold 20 and the moving mold 30. At least one corresponding side wall of the fixed mold base plate 10 and the support plate 40 is respectively provided with a first connecting member 11 and a second connecting member 41 that can be inserted and engaged with each other. The side wall of the moving mold 30 is provided with a retractable first locking block 31 and a second locking block 32. The two are arranged in the vertical direction and are located on the movement trajectory of the first connecting member 11 and the second connecting member 41 when they are inserted or separated. The first connecting member 11 has a first guide groove 111 that drives the first locking block 31 and the second locking block 32 to retract into the moving mold 30. The second connecting member 41 has a second guide groove 411 that pushes the first locking block 31 to retract into the moving mold 30. During mold opening, the fixed mold base plate 10 first moves upward to open the mold, and drives the first connecting member 11 to move upward synchronously. At this time, the bottom wall of the inner cavity of the first guide groove 111 abuts against the bottom end of the first locking block 31, forcing the fixed mold base plate 10 to stop moving. At the same time, the first connecting member 11 and the second locking block 32 are disengaged. Subsequently, the moving mold 30 moves upward to separate from the support plate 40, driving the first locking block 31 and the second locking block 32 upward. The first locking block 31 abuts against the side wall of the second guide groove 411 on the second connecting member 41 and is pushed by it to overcome the elastic force and retract into the moving mold 30. At the same time, as the moving mold 30 moves upward, it releases the second connecting member 41 from limiting the second locking block 32, and the second locking block 32 automatically retracts into the moving mold. The moving mold 30 pops outward from inside. When the moving mold 30 reaches a specific position, the bottom of the second guide groove 411 abuts against the popped-out second locking block 32, forcing the movement to stop, thus achieving delayed positioning. At this time, the fixed mold 20 begins to move upward, eventually causing the first connecting piece 11 and the second connecting piece 41 to completely separate. Throughout the mold opening process, through the coordination of the first connecting piece 11 and the second connecting piece 41, and their orderly linkage with the first locking block 31 and the second locking block 32, the core pulling sequence of the inclined pulling mechanism 50 is precisely controlled, effectively avoiding interference between the inclined core pulling and the mold cavity or product, thus completely eliminating the possible collision phenomenon during mold opening and closing, and ensuring the safety and reliability of mold operation.

[0023] For example, the moving mold 30 has two receiving slots 33 on its sidewall, which respectively accommodate the first locking block 31 and the second locking block 32. Each receiving slot 33 is provided with a first elastic element 34, and the first locking block 31 and the second locking block 32 are respectively connected to the first elastic element 34 in the corresponding receiving slot 33. In the natural state, the elastic force of the spring drives the first locking block 31 and the second locking block 32 to have an outward extension tendency. When there is no external component to limit or compress, the two locking blocks can be pushed outward from their respective receiving slots 33 by the spring, so that during the mold opening and closing process, the specific movement trajectory of the first connecting member 11 and the second connecting member 41 itself will come into contact with and interact with the popped-out locking blocks. By controlling the sequence and timing of this interaction, the movement sequence of the mold is controlled, thereby reliably controlling the mold opening and closing process, ensuring that the inclined pulling mechanism 50 operates safely in a predetermined sequence, and effectively preventing mechanism interference or collision.

[0024] For example, the protruding ends of the first locking block 31 and the second locking block 32 have inclined surfaces on their upper parts. During the mold closing or opening process, when the first connecting member 11 or the second connecting member 41 comes into contact with the locking block, the inclined portion on it first acts on the inclined surface on the upper part of the locking block. Through the guidance and conversion of the inclined surface, the horizontal or vertical movement force of the connecting member is effectively converted into a radial component force that forces the locking block to retract axially inward along its receiving groove 33.

[0025] For example, the width of the second connector 41 is greater than that of the first connector 11, and the first connector 11 is inserted into the middle of the second connector 41. The sides of the first locking block 31 and the second locking block 32 extend toward the sides of the second connector 41, respectively. When the first connector 11 and the second connector 41 are in a fully inserted mold-closed state, the extended portions of the first locking block 31 and the second locking block 32 can still maintain contact with or be within the range of action of the second guide groove 411 on the inner walls of the two sides of the second connector 41 and the first guide groove 111 on the first connector 11, respectively. Thus, during the entire mold closing and opening process, regardless of whether the two connectors are in an inserted, relative movement, or separated state, the first guide groove 111 and the second guide groove 411 can interact with the inclined surfaces on the corresponding locking blocks by means of their profiles, smoothly pressing the locking blocks back into the receiving groove 33, so as to achieve precise, stable, and interference-free control of the mold opening and closing sequence.

[0026] For example, the first guide groove 111 includes a connecting groove 1111 for accommodating the first locking block 31, and a cutout 1112 for pushing the second locking block 32 to move. The cutout 1112 is located below the connecting groove 1111 and is arranged vertically with the connecting groove 1111 along the radial direction of the first connecting member 11. The shape of the top of the inner cavity of the cutout 1112 is adapted to the inclined surface on the second locking block 32. The connecting groove 1111 is used to accommodate the first locking block 31 in the mold-closed state, playing a positioning and holding role. When the mold opening action begins and the first connecting member 11 moves upward with the fixed mold base plate 10, the cutout 1112 can provide a non-interference clearance space for the second locking block 32, so that it is no longer squeezed by the body of the first connecting member 11, and can thus be freely ejected under the action of elastic force.

[0027] It should be noted that during the mold closing process, when the first connecting piece 11 moves downward, the inclined surface at the top of the inner cavity of the cut 1112 will contact the inclined surface of the second locking block 32. Through the inclined surface cooperation, the vertical downward movement is converted into radial thrust, which forces the second locking block 32 to overcome the elastic force and smoothly retract into the storage groove 33, thereby ensuring that the mold closing action sequence is correct and there is no risk of collision.

[0028] For example, the second guide groove 411 is provided on both sides of the second connector 41, and the shape of the top of the inner cavity of the second guide groove 411 is adapted to the inclined surface on the first locking block 31. When the mold is opened, when the moving mold 30 moves upward, the first locking block on it will be guided by the second guide groove 411 on both sides of the second connector 41, ensuring that the force symmetrically pushes the first locking block 31 to retract, creating conditions for the subsequent separation of the first connector 11 and the second connector 41.

[0029] It should be noted that during mold closing, when the moving mold 30 moves downward, the inclined surface on the first locking block 31 will first contact the inclined surface inside the second guide groove 411 on the second connecting piece 41. Through the inclined surface cooperation, the vertical mold closing force of the mold is converted into a horizontal thrust, forcing the first locking block 31 to overcome the spring force and retract into the moving mold 30. This ensures that the first locking block 31 is retracted before the moving mold 30 and the fixed mold 20 are completely closed, making room for the safe reset of the inclined pulling mechanism or triggering its next action. This strictly guarantees the mold closing sequence and fundamentally avoids mold collision.

[0030] For example, at least one side wall of the fixed mold 20 is provided with a fixing plate 21. The fixing plate 21 is provided with two through holes 22. Movable push rods 23 and stop rods 24 are respectively inserted into the two through holes 22, and the push rods 23 and stop rods 24 are respectively connected to the fixed mold base plate 10 and the support plate 40.

[0031] Movable connecting blocks 25 are inserted into the two openings 22, and a second elastic element 26 connected to the connecting block 25 is provided in the opening 22 corresponding to the push rod 23.

[0032] The connecting block 25 is concave, and both the inner and outer side walls of the connecting block 25 are provided with inclined surfaces.

[0033] The stop lever 24 has an abutment part 241 on one side, and the upper and lower ends of the abutment part 241 are provided with inclined surfaces. The inclined surfaces are adapted to the inclined surfaces on the outer side wall of the connecting block 25. The top of the push rod 23 is also provided with an inclined surface, which is adapted to the inclined surfaces on the inner side wall of the connecting block 25. When the mold is closed, the inner part of the connecting block 25 extends out and is locked under the inclined surface of the top of the push rod 23 under the pushing force of the second elastic element 26, thereby restricting the upward movement of the push rod 23 and the support plate 40 connected to it. When the mold opens, the fixed mold base plate 10 moves upward, driving the stop rod 24 to move upward synchronously. The inclined surface at the lower end of the contact part 241 on the stop rod 24 then contacts and presses the inclined surface of the outer wall of the connecting block 25, forcing the connecting block 25 to overcome the elastic force of the second elastic element 26 and contract inward, so that its inner part exits from under the inclined surface of the top of the push rod 23. After the limit is released, when the moving mold 30 and the support plate 40 begin to separate under the power of the injection molding machine, the support plate 40 can drive the push rod 23 to move upward freely. At this time, the fixed plate 21 can also move upward synchronously under the push of the moving mold 30, thereby controlling the overall mold opening sequence and ensuring the safe core pulling of the inclined pulling mechanism.

[0034] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fastening mechanism for controlling the oblique pulling sequence of front and rear molds, wherein the front and rear molds include a fixed mold base plate (10), a fixed mold (20), a moving mold (30), and a support plate (40) arranged sequentially, and an oblique pulling mechanism (50) disposed within the fixed mold (20) and the moving mold (30), characterized in that: The fixed mold base plate (10) and the support plate (40) are respectively provided with a first connector (11) and a second connector (41) that can be plugged into each other on at least one corresponding side wall. The moving mold (30) is provided with a retractable first locking block (31) and a second locking block (32) on the side wall. The two are arranged in the vertical direction and are located on the movement trajectory of the first connector (11) and the second connector (41) plugging in or separating. The first connector (11) has a first guide groove (111) that can drive the first locking block (31) and the second locking block (32) to retract into the moving mold (30), and the second connector (41) has a second guide groove (411) that can push the first locking block (31) to retract into the moving mold (30).

2. The fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 1, characterized in that: The side wall of the moving mold (30) has two storage slots (33) that respectively accommodate the first card block (31) and the second card block (32). Each storage slot (33) is provided with a first elastic element (34). The first card block (31) and the second card block (32) are respectively connected to the first elastic element (34) in the corresponding storage slot (33).

3. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 1, characterized in that: The first card block (31) and the second card block (32) have an extended end with an inclined surface on the upper part.

4. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 3, characterized in that: The width of the second connector (41) is greater than that of the first connector (11), and the first connector (11) is inserted into the middle of the second connector (41). The sides of the first locking block (31) and the second locking block (32) extend toward the sides of the second connector (41).

5. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 3, characterized in that: The first guide groove (111) includes a connecting groove (1111) for accommodating the first locking block (31) and a cutout (1112) for pushing the second locking block (32) to move. The cutout (1112) is located below the connecting groove (1111) and is arranged vertically with the connecting groove (1111) along the radial direction of the first connector (11). The shape of the top of the inner cavity of the cutout (1112) is adapted to the inclined surface on the second locking block (32).

6. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 3, characterized in that: The second guide groove (411) is located on both sides of the second connector (41), and the shape of the top of the inner cavity of the second guide groove (411) is adapted to the inclined surface on the first card block (31).

7. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 1, characterized in that: The fixed mold (20) has at least one side wall with a fixing plate (21). The fixing plate (21) has two through openings (22) that run vertically through each other. Movable push rods (23) and stop rods (24) are respectively inserted into the two through openings (22). The push rods (23) and stop rods (24) are respectively connected to the fixed mold base plate (10) and the support plate (40).

8. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 7, characterized in that: Movable connecting blocks (25) are inserted into the two openings (22), and a second elastic element (26) connected to the connecting block (25) is provided in the opening (22) of the corresponding push rod (23).

9. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 8, characterized in that: The connecting block (25) is concave, and both the inner and outer sidewalls of the connecting block (25) are provided with inclined surfaces.

10. A fastening machine for controlling the oblique pulling sequence of the front and rear molds according to claim 9, characterized in that: The stop bar (24) has an abutment part (241) on one side, and the upper and lower ends of the abutment part (241) are provided with inclined surfaces, which are adapted to the inclined surfaces on the outer side wall of the connecting block (25); the top of the push rod (23) is also provided with an inclined surface, which is adapted to the inclined surfaces on the inner side wall of the connecting block (25).

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