Multi-angle movable demolding mechanism for special-shaped plastic pipe

Abstract

The utility model provides a multi-angle movable demoulding mechanism for a special-shaped plastic pipe, which comprises a mold core, and further comprises a sleeve, a rotating block, a connecting rod and a drawing rod which are connected to a mold in a sliding manner, the end part of the sleeve is used for abutting against the end part of the mold core, the rotating block is connected with the mold core through a transverse steering assembly, and the connecting rod is connected with the drawing rod. The connecting rod is connected with the rotating block through the longitudinal steering assembly, the drawing rod is connected with the connecting rod through the fine adjustment assembly, and the rotating block, the connecting rod and the drawing rod are all located in the sleeve so that the purpose of smoothly drawing away from the special-shaped mold core can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular, to a multi-angle movable demolding mechanism for irregularly shaped plastic tubes. Background Technology

[0002] Injection molding, as a highly efficient method for processing plastic products, is widely used in various industries. To meet the demands of complex product designs, molds often require cores to form features such as cavities, holes, or undercuts. Successfully removing these cores from the molded product after the injection molding process—core removal—is a crucial step in ensuring product integrity and the proper functioning of the mold.

[0003] For cores with simple shapes, such as cylindrical or square cores that only require linear pulling along the mold opening direction, a relatively simple linear core-pulling mechanism can usually be used. For example, the core can be pulled out by directly driving it linearly backward using a standard hydraulic or pneumatic cylinder. However, in actual product design, complex, irregularly shaped cores may appear, such as... Figures 1 to 3 The diagram shows the structure of core 1 and its position within cavity 3. For this type of irregularly shaped core 1, if only simple straight-line extraction is performed, the irregular structure of core 1 will interfere with the product, preventing successful extraction and potentially damaging the product or mold 2. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a multi-angle movable demolding mechanism for irregularly shaped plastic tubes, so as to achieve the purpose of smoothly removing the irregularly shaped core.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a multi-angle movable demolding mechanism for irregularly shaped plastic tubes, including a core, and a sleeve, a rotating block, a connecting rod, and a pull rod all slidably connected to the mold. The end of the sleeve is used to abut against the end of the core. The rotating block is connected to the core through a transverse steering assembly. The connecting rod is connected to the rotating block through a longitudinal steering assembly. The pull rod is connected to the connecting rod through a fine-tuning assembly. The rotating block, the connecting rod, and the pull rod are all located inside the sleeve.

[0006] To achieve the above technical solution, firstly, the sleeve is withdrawn, completing the initial release of the core. Then, the pull rod drives the connecting rod and rotating block to move as a whole. Simultaneously, through the cooperation of the lateral and longitudinal steering components, the core is driven to precisely rotate or oscillate while moving linearly. This multi-angle movable motion trajectory combining linear and rotational movements allows the core to cleverly avoid the complex structure of the product's inner wall, achieving smooth and reliable core release. This significantly improves the success rate and efficiency of demolding, reduces the risk of damage to irregularly shaped plastic tubes and molds, ensures product quality, and makes automated production possible.

[0007] As a preferred scheme of the utility model, the transverse steering assembly comprises a first protrusion, a guide groove, a guide shaft, a first inclined surface, and a first guide column, the core is provided with a placing groove for placing the first protrusion, the first protrusion is fixed to one side of the rotating block facing the core, the guide groove is provided on the first protrusion, the guide shaft is fixed to the core and is slidably connected to the guide groove after passing through the placing groove, the first protrusion and one side of the rotating block facing the core are provided with the first inclined surface, the core is slidably connected with the first guide column, the first guide column is provided with the first elastic member between the core, and the first guide column is used for being slidably connected to the first inclined surface.

[0008] The above technical scheme is realized, the guide shaft can drive the core to move along the length direction of the guide groove, meanwhile, the first inclined surface is arranged, so that the core can be overturned along the axis of the guide shaft, and the core has the freedom of transverse movement and transverse rotation. The first guide column is more smooth in sliding along the first inclined surface through the elastic force of the first elastic member, and the core has the function of reverse movement, so that the core can be smoothly demolded.

[0009] As a preferred scheme of the utility model, the core is provided with a first sliding hole, the first guide sleeve is fixed in the first sliding hole, the first guide column is slidably connected to the first guide sleeve, and the first guide column is provided with a first arc surface at one end close to the first inclined surface.

[0010] The above technical scheme is realized, the first guide sleeve is precisely fixed in the first sliding hole of the core, and the first guide column is smoothly slid therein, a stable and reliable guide pair is constructed, friction and wear in the movement process are remarkably reduced, and the smoothness and accuracy of the movement of the first guide column are ensured, the first arc surface is carefully designed at one end of the first guide column close to the first inclined surface, the contact mode with the first inclined surface is optimized, contact stress is effectively dispersed, the possibility of surface wear and jamming is further reduced, and the reliability and service life of the mechanism operation are enhanced.

[0011] As a preferred scheme of the utility model, one side of the rotating block facing the core is provided with a first plane, and the core is provided with a second plane for abutting against the first plane.

[0012] The above technical scheme is realized, the first plane and the second plane are arranged on the rotating block and the core respectively and abut against each other, and the core is provided with important stable support in the injection stage. In the high-temperature and high-pressure injection process, the first plane and the second plane abut closely and can effectively bear and disperse the huge injection pressure and the lateral force generated thereby acting on the core, so that the core is prevented from deforming, deviating or vibrating.

[0013] As a preferred scheme of the utility model, the longitudinal steering assembly comprises a second protruding part, a second inclined surface and a second guide column, the second protruding part is fixed to one side of the rotary block opposite the core, a first connecting groove is formed in the connecting rod, the second protruding part is hinged in the first connecting groove, the second inclined surface is formed in one side of the second protruding part opposite the core, the second guide column is slidingly connected to the connecting rod, one end of the second guide column away from the connecting rod is slidingly connected to the second inclined surface, and a second elastic member is arranged between the second guide column and the connecting rod.

[0014] The above technical scheme is realized, the second protruding part can be turned over along the hinge to enable the core to have the longitudinal movement capability, the second guide column and the second inclined surface are kept in contact through the elastic force of the second elastic member to enable the core to have the reverse movement capability, the core effectively avoids the complex structure of the inner wall of the special-shaped plastic pipe in combination with the transverse steering assembly, and the smooth and reliable demolding of the core is ensured.

[0015] As a preferred scheme of the utility model, a second sliding hole is formed in the connecting rod, a second guide sleeve is fixed in the second sliding hole, the second guide column is slidingly connected to the second guide sleeve, and a second arc surface is arranged at one end of the second guide column close to the second inclined surface.

[0016] The above technical scheme is realized, the second guide sleeve provides the second guide column with high-precision, high-stability and wear-resistant linear guidance, and the smoothness and reliability of the key motion pair are ensured. The second arc surface arranged at one end of the second guide column close to the second inclined surface further optimizes the contact state between the second guide column and the second inclined surface, effectively reduces the contact stress concentration, reduces the possibility of local wear and jamming, and improves the stability and durability of the overall movement of the longitudinal steering assembly.

[0017] As a preferred scheme of the utility model, a third plane for abutting against the inner wall of the first connecting groove is formed in the second protruding part.

[0018] The above technical scheme is realized, when high-pressure injection load is borne, the third plane contacting the inner wall of the first connecting groove can effectively transmit and disperse the force, the ability to resist the injection pressure is enhanced, and the deformation and wear of the parts are reduced.

[0019] As a preferred scheme of the utility model, the fine adjustment assembly comprises a third protruding part and a third inclined surface, the third protruding part is fixed to one end of the connecting rod away from the rotary block, the third inclined surface is formed in the third protruding part, a second connecting groove is formed in the pull rod, the third protruding part is hinged in the second connecting groove, and a fourth plane for abutting against the inner wall of the second connecting groove is formed in the end part of the third protruding part.

[0020] The third convex part is hinged in the second connecting groove, a key hinge point on the force transmission chain is constructed, necessary angle change between the pull rod and the connecting rod is allowed to adapt to potential centering deviation in the movement process, and the end of the third convex part is provided with a fourth plane for abutting, so that stable support and good bearing capacity are provided for the hinge point. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure shows the position of the core in the cavity of the mold;

[0022] Figure 2 The figure shows the structure of the existing core;

[0023] Figure 3 The figure shows the bottom surface of the existing core;

[0024] Figure 4 The figure shows the structure of the utility model;

[0025] Figure 5 The figure shows the structure of the sleeve in the utility model;

[0026] Figure 6 The figure shows the position of the core in the utility model;

[0027] Figure 7 The figure shows the structure of the core, the rotating block, the connecting rod and the pull rod;

[0028] Figure 8 The figure shows the position of the core, the rotating block, the connecting rod and the pull rod;

[0029] Figure 9 The figure shows the structure of the core in the utility model;

[0030] Figure 10 The figure shows the structure of the first guide pillar and the first convex part;

[0031] Figure 11 The figure shows the structure of the rotating block;

[0032] Figure 12 The figure shows the structure of the connecting rod;

[0033] Figure 13 The figure shows the structure of the third convex part;

[0034] Figure 14 The figure shows the structure of the pull rod.

[0035] Label: 1, core; 2, mold; 3, cavity; 4, sleeve; 5, rotating block; 6, connecting rod; 7, pull rod; 8, transverse steering assembly; 9, first protrusion; 10, guide groove; 11, guide shaft; 12, first inclined surface; 13, first guide column; 14, placing groove; 15, first sliding hole; 16, first guide sleeve; 17, first arc surface; 18, first plane; 19, second plane; 20, longitudinal steering assembly; 21, second protrusion; 22, second inclined surface; 23, second guide column; 24, second sliding hole; 25, second guide sleeve; 26, second arc surface; 27, third plane; 28, first connecting groove; 29, fine adjustment assembly; 30, third protrusion; 31, third inclined surface; 32, second connecting groove; 33, fourth plane. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying drawings. Figure 4 to the accompanying drawings Figure 14 The specific embodiments of the utility model will be further described in detail to make the technical scheme of the utility model more easily understood and mastered.

[0037] A multi-angle movable demolding mechanism for special-shaped plastic pipes comprises a core 1, a sleeve 4, a rotating block 5, a connecting rod 6 and a pull rod 7 which are all slidingly connected to a mold 2, and the core 1 is of a special-shaped structure. The end of the sleeve 4 is used to abut against the end of the core 1 to provide the core 1 with good supporting force. The end face of the sleeve 4 is a plane, and the end face of the core 1 facing the sleeve 4 is also a plane.

[0038] The rotating block 5 is connected to the core 1 through a transverse steering assembly 8. The transverse steering assembly 8 comprises a first protrusion 9, a guide groove 10, a guide shaft 11, a first inclined surface 12 and a first guide column 13. A placing groove 14 for placing the first protrusion 9 is formed in the core 1, and the placing groove 14 is a straight groove.

[0039] The first protrusion 9 is integrally arranged on the side of the rotating block 5 facing the core 1, and the guide groove 10 is formed in the first protrusion 9. The guide shaft 11 is cylindrical, and the guide shaft 11 is fixed to the core 1 and slidingly connected to the guide groove 10 after passing through the placing groove 14. Through the arrangement of the guide groove 10, the core 1 can be laterally translated along the guide groove 10.

[0040] The first convex part 9 and the rotating block 5 are provided with a first inclined surface 12 on the side facing the core 1. Two first sliding holes 15 are formed on the side of the core 1 facing the rotating block 5, and a first guide sleeve 16 is fixed in each first sliding hole 15. The first guide column 13 is slidingly connected in the first guide sleeve 16. The end of the first guide column 13 close to the first inclined surface 12 is provided with a first arc surface 17. The end of the first guide column 13 is slidingly connected to the first inclined surface 12. A first elastic member (not shown in the figure) is arranged between the first guide column 13 and the first guide sleeve 16, and the first elastic member is sleeved on the first guide column 13. The first elastic member is a spring.

[0041] A first flat surface 18 is formed on the side of the rotating block 5 facing the core 1, and a second flat surface 19 is formed on the core 1 for abutting against the first flat surface 18.

[0042] The connecting rod 6 is connected to the rotating block 5 through a longitudinal turning assembly 20, and the longitudinal turning assembly 20 includes a second convex part 21, a second inclined surface 22, and a second guide column 23. The second convex part 21 is integrally connected to the side of the rotating block 5 away from the core 1. A first connecting groove 28 is formed on the connecting rod 6, and the first connecting groove 28 is a straight groove. The second convex part 21 is hingedly connected in the first connecting groove 28, and the second inclined surface 22 is formed on the side of the second convex part 21 away from the core 1. Through the arrangement of the second inclined surface 22, the core 1 can be turned downward.

[0043] The second guide column 23 is slidingly connected to the connecting rod 6, and the sliding direction of the second guide column 23 is parallel to the length direction of the connecting rod 6. A second sliding hole 24 is formed on the connecting rod 6, and a second guide sleeve 25 is fixed in the second sliding hole 24. The second guide column 23 is slidingly connected in the second guide sleeve 25. The end of the second guide column 23 close to the second inclined surface 22 is provided with a second arc surface 26. The end of the second guide column 23 away from the connecting rod 6 is slidingly connected to the second inclined surface 22.

[0044] A second elastic member (not shown in the figure) is sleeved on the second guide column 23, and one end of the second elastic member abuts against the second guide column 23, and the other end of the second elastic member abuts against the second guide sleeve 25. The second elastic member is a spring. Through the elastic force of the second elastic member, the end of the second guide column 23 keeps in contact with the second inclined surface 22.

[0045] A third flat surface 27 is formed on the second convex part 21 for abutting against the inner wall of the first connecting groove 28.

[0046] The pull rod is connected with the connecting rod 6 through a fine adjustment assembly 29. The fine adjustment assembly 29 comprises a third protrusion 30 and a third inclined surface 31. The third protrusion 30 is integrally connected to one end of the connecting rod 6 away from the rotating block 5, and a second connecting groove 32 is formed on the pull rod 7, and the third protrusion 30 is hinged in the second connecting groove 32. The third inclined surface 31 is formed on the third protrusion 30, and the connecting rod 6 can be turned upward through the third inclined surface 31, that is, the core 1 can be turned upward.

[0047] An end of the third protrusion 30 is provided with a fourth plane 33 for abutting against the inner wall of the second connecting groove 32.

[0048] The rotating block 5, the connecting rod 6 and the pull rod are all located inside the sleeve 4.

[0049] Of course, the above is only a typical example of the present application, in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A multi-angle movable demolding mechanism for irregularly shaped plastic tubes, comprising a core (1), characterized in that: It also includes a sleeve (4), a rotating block (5), a connecting rod (6), and a pull rod (7) that are all slidably connected to the mold (2). The end of the sleeve (4) is used to abut against the end of the core (1). The rotating block (5) is connected to the core (1) through a transverse steering assembly (8). The connecting rod (6) is connected to the rotating block (5) through a longitudinal steering assembly (20). The pull rod (7) is connected to the connecting rod (6) through a fine-tuning assembly (29). The rotating block (5), the connecting rod (6), and the pull rod (7) are all located inside the sleeve (4).

2. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 1, characterized in that: The lateral steering assembly (8) includes a first protrusion (9), a guide groove (10), a guide shaft (11), a first inclined surface (12), and a first guide post (13). The core (1) has a placement groove (14) for placing the first protrusion (9). The first protrusion (9) is fixed to the side of the rotating block (5) facing the core (1). The guide groove (10) is opened on the first protrusion (9). The guide shaft (11) is fixed on the core (1) and passes through the placement groove (14) and is slidably connected in the guide groove (10). The first protrusion (9) and the rotating block (5) have a first inclined surface (12) on the side facing the core (1). The first guide post (13) is slidably connected on the core (1). A first elastic element is provided between the first guide post (13) and the core (1). The first guide post (13) is slidably connected to the first inclined surface (12).

3. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 2, characterized in that: The core (1) has a first sliding hole (15), a first guide sleeve (16) is fixed inside the first sliding hole (15), the first guide post (13) is slidably connected in the first guide sleeve (16), and a first arc-shaped surface (17) is provided at one end of the first guide post (13) near the first inclined surface (12).

4. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 3, characterized in that: The rotating block (5) has a first plane (18) on the side facing the core (1), and the core (1) has a second plane (19) for abutting against the first plane (18).

5. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 1, characterized in that: The longitudinal steering assembly (20) includes a second protrusion (21), a second inclined surface (22), and a second guide post (23). The second protrusion (21) is fixed to the side of the rotating block (5) facing away from the core (1). A first connecting groove (28) is provided on the connecting rod (6). The second protrusion (21) is hinged in the first connecting groove (28). The second inclined surface (22) is provided on the side of the second protrusion (21) facing away from the core (1). The second guide post (23) is slidably connected to the connecting rod (6). The end of the second guide post (23) away from the connecting rod (6) is slidably connected to the second inclined surface (22). A second elastic element is provided between the second guide post (23) and the connecting rod (6).

6. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 5, characterized in that: The connecting rod (6) has a second sliding hole (24), a second guide sleeve (25) is fixed in the second sliding hole (24), the second guide post (23) is slidably connected in the second guide sleeve (25), and a second arc-shaped surface (26) is provided at one end of the second guide post (23) near the second inclined surface (22).

7. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 6, characterized in that: The second protrusion (21) has a third plane (27) for abutting against the inner wall of the first connecting groove (28).

8. The multi-angle movable demolding mechanism for irregularly shaped plastic tubes according to claim 7, characterized in that: The fine-tuning component (29) includes a third protrusion (30) and a third inclined surface (31). The third protrusion (30) is fixed to the end of the connecting rod (6) away from the rotating block (5). The third inclined surface (31) is opened on the third protrusion (30). The pull rod (7) is provided with a second connecting groove (32). The third protrusion (30) is hinged in the second connecting groove (32). The end of the third protrusion (30) is provided with a fourth plane (33) for abutting against the inner wall of the second connecting groove (32).

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