Demolding mechanism for injection molding of irregular workpiece

Abstract

The utility model provides a demolding mechanism for injection molding of irregular workpieces, and relates to the technical field of workpiece demolding mechanisms. Comprising a demolding plate, an adjusting demolding structure, a movable mold and a fixed mold, a guide-out rod is slidably mounted on the inner wall of the fixed mold, and a first mounting frame is fixedly connected to one side of the guide-out rod. According to the demolding mechanism, the number and the positions of the ejection rods are fixed, the situation that the ejection work of irregular workpieces cannot be met is avoided, the high cost generated by independently designing different irregular workpiece demolding mechanisms can be reduced, and when wind power of the driving fan blade and the driven fan blade is blown downwards, the ejection rods and other components can be used for demolding the irregular workpieces. And wind is blown to the contact part of the ejector rod and the finished product, so that cooling is accelerated, and deformation caused by insufficient hardness of the contact part due to too high temperature during demolding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece demoulding mechanisms, in particular to a demoulding mechanism for injection molding of irregular workpieces. Background Art

[0002] During the injection molding process, after the injection molding is completed between the fixed mold and the movable mold, the finished workpiece needs to be demolded. At this time, under the action of the driving structure, the movable mold is driven to move, and then under the action of the export rod inside the fixed mold, the finished workpiece is separated from the fixed mold and attached to the movable mold. At this time, the finished workpiece can be separated from the movable mold under the action of the demolding mechanism on the movable mold.

[0003] In actual work, although the demoulding mechanism of the existing technology can solve most demoulding problems and achieve a high success rate of demoulding, there are still the following two problems:

[0004] 1. In actual demoulding, the appearance of irregular workpieces is irregular, and the position of the ejector rod is fixed. When the ejector rod acts on the outer surface of the irregular workpiece, it is easy to cause the irregular workpiece to be deformed and damaged due to uneven force. If an ejector rod or ejector structure is designed specifically for a certain special-shaped workpiece, the application of the ejector structure will be single, that is, it can only eject specific special-shaped workpieces, resulting in an increase in production costs;

[0005] 2. After the injection molding of the workpiece, the temperature of its outer surface is relatively high, and the hardness of the overall workpiece is relatively low. At this time, if the ejector rod is used to directly push the workpiece outward, it is easy to cause deformation of the part of the workpiece that the ejector rod contacts.

[0006] Therefore, the utility model provides a demoulding mechanism for injection molding of irregular workpieces. Utility Model Content

[0007] The utility model aims to solve the shortcomings in the prior art and provide a demoulding mechanism for injection molding of irregular workpieces.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a demolding mechanism for injection molding of irregular workpieces, comprising a demolding plate, an adjustable demolding structure, a movable mold and a fixed mold, the inner wall of the fixed mold is slidably mounted with a lead-out rod, one side of the lead-out rod is fixedly connected with a first mounting frame, and the first mounting frame is fixedly mounted with an external hydraulic pushing device; the adjustable demolding structure is arranged on one side of the demolding plate, and the other side of the demolding plate is provided with an air-drying structure; one side of the demolding plate is provided with a dust-proof structure that can be separated from the demolding plate between the demolding plate and the adjustable demolding structure, and the demolding plate is fixedly connected with a second mounting frame on one side of the dust-proof structure; the adjustable demolding structure comprises an ejector rod with an adjustable number and a threaded barrel for mounting the ejector rod, one end of the ejector rod is fixedly connected with a threaded clamping rod adapted to the threaded barrel, and one end of the ejector rod is fixedly connected with a cambered ring block; the air-drying structure comprises a driving gear and two driven gears, the driving gear is meshedly connected with the driven gear, one side of the driving gear is fixedly connected with a driving fan blade, and one side of the driven gear is fixedly connected with a driven fan blade.

[0009] As a preferred embodiment, a socket is provided on the inner wall of the protruding structure of the movable mold, and the ejector rod can be inserted from the inner wall of the socket. The ejector rod and the threaded barrel are both hollow structures, and a circular through hole connected to the inner wall of the ejector rod is provided on the inner wall of the arc ring block.

[0010] The technical effect of adopting the above-mentioned further scheme is that the ejector rod is inserted into the socket on the movable mold to complete the ejection of the injection molded product, and at the same time, under the action of the hollow structure of the ejector rod and the threaded barrel, the circular through hole opened on the arc ring block can be cooperated, so that the ejector rod can become an "air duct", and the wind fanned out by the active fan blades and the driven fan blades can be blown to the injection molded product, so that the contact part between the ejector rod and the finished product can be accelerated to dry under the action of wind force, thereby avoiding the situation where the contact part is overheated and the hardness is insufficient, and then it is pushed and deformed by the ejector rod.

[0011] As a preferred embodiment, both sides of the stripping plate are fixedly connected with L-shaped connecting rods, one end of the L-shaped connecting rod away from the stripping plate is fixedly connected with a mounting plate, one side of the mounting plate is fixedly mounted with a driving motor, the output end of the driving motor is fixedly connected with an active rod, one end of the active rod is fixedly connected to one side of a driving gear, one side of the mounting plate is located at the top and bottom of the active rod and is symmetrically rotatably connected with a driven rod, and one end of the two driven rods is respectively fixedly connected to one side of two driven gears.

[0012] The technical effect of adopting the above further scheme is: the driving motor can drive the active rod to rotate, and at the same time drive the active gear to rotate. The active gear and the driven gear are meshed with each other, so the driven gear and the driven rod can be driven to rotate at the same time, and then the active fan blades and the driven fan blades can be driven to rotate at the same time, thereby avoiding the situation where the wind force of a single active fan blade is limited and dispersed, resulting in weak wind force at the top and bottom affecting air drying, and then the ejector rod and other components can be cooperated to accelerate the air drying of the contact parts of the finished product.

[0013] As a preferred embodiment, an air outlet is provided on one side of the stripping plate, and the air outlet is communicated with the interior of the threaded barrel;

[0014] The dustproof structure comprises a plurality of circular clamping rods, one side of which is fixedly connected to a dustproof plate, the other side of which is provided with a circular clamping groove, the inner wall of which is clamped with a circular clamping block, and one side of the outer surface of which is fixedly connected to a stopper;

[0015] The round clamping rod can pass through the inner wall of the air outlet.

[0016] The technical effect of adopting the above-mentioned further scheme is: through the air outlet, the wind blown by the active fan blades and the driven fan blades can be blown to the inner wall of the ejector rod, and then blown to the contact part of the finished product. The round clamp rod can block the air outlet and the threaded barrel when they are not in use, and then under the action of the round clamp block and the round clamp groove, the round clamp rod is prevented from separating, thereby preventing the air outlet and the threaded barrel from falling into dust when not in use, and thereby preventing dust from blowing to the finished product and causing the finished product to be dirty when it is used again.

[0017] Compared with the prior art, the advantages and positive effects of the utility model are:

[0018] Through the action of the threaded barrel and the threaded clamping rod, the number of ejector rods can be increased or decreased according to demand. Therefore, when demolding different molds, it is only necessary to open corresponding circular through holes according to the shape of the workpiece, and then match different numbers of ejector rods, thereby avoiding the problem of the number and position of the ejector rods being fixed, and thus being unable to meet the ejection work of irregular workpieces. It can also reduce the high cost of a single design of a demolding mechanism for different irregular workpieces. When the wind force of the active fan blades and the driven fan blades blows downward, the wind force can be blown to the contact part between the ejector rod and the finished product through components such as the ejector rod, thereby accelerating cooling and avoiding deformation caused by insufficient hardness of the contact part due to excessive temperature during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0020] Figure 2A schematic diagram of the structure of a demoulding plate of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0021] Figure 3 A schematic diagram of the structure of a movable mold of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0022] Figure 4 A schematic diagram of the structure of the ejector rod of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0023] Figure 5 A schematic diagram of the structure of a movable mold of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0024] Figure 6 A schematic diagram of the back structure of a demoulding plate of a demoulding mechanism for injection molding of irregular workpieces provided by the utility model;

[0025] Figure 7 The utility model provides a schematic diagram of the dustproof structure of a demoulding mechanism for injection molding of irregular workpieces.

[0026] Legend:

[0027] 1. Mobile mold;

[0028] 2. Fixed mold;

[0029] 3. Demolition plate;

[0030] 4. Adjusting demoulding structure; 41. Threaded barrel; 42. Ejector rod; 43. Threaded clamping rod; 44. Arc surface ring block; 45. Round through hole; 46. Socket;

[0031] 5. Air drying structure; 51. L-shaped connecting rod; 52. Mounting plate; 53. Driving motor; 54. Active rod; 55. Active gear; 56. Active fan blade; 57. Driven rod; 58. Driven gear; 59. Driven fan blade; 510. Air outlet;

[0032] 6. The first mounting frame;

[0033] 7. Export rod;

[0034] 8. Second mounting frame;

[0035] 9. dustproof structure; 91. dustproof plate; 92. round clamp rod; 93. round clamp groove; 94. round clamp block; 95. stop block. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figure 1-Figure 6 As shown, this embodiment provides a technical solution: a demolding mechanism for injection molding of irregular workpieces, comprising a demolding plate 3, an adjustable demolding structure 4, a movable mold 1 and a fixed mold 2, a guide rod 7 is slidably installed on the inner wall of the fixed mold 2, one side of the guide rod 7 is fixedly connected to a first mounting frame 6, the first mounting frame 6 is fixedly installed with an external hydraulic pushing device, the adjustable demolding structure 4 is arranged on one side of the demolding plate 3, and the other side of the demolding plate 3 is provided with an air-drying structure 5, one side of the demolding plate 3 is located between the demolding plate 3 and the adjustable demolding structure 4. A dustproof structure 9 that can be separated from the demolding plate 3 is arranged, and the demolding plate 3 is located on one side of the dustproof structure 9. The second mounting frame 8 is fixedly connected, and the adjustable demolding structure 4 includes an adjustable number of ejector rods 42 and a threaded barrel 41 for installing the ejector rods 42. The threaded barrel 41 and the threaded clamping rod 43 function to make the ejector rod 4 2 can be increased or decreased according to demand, and then when demolding different molds, it is only necessary to open a corresponding circular through hole 45 according to the shape of the workpiece, one end of the ejector rod 42 is fixedly connected with a threaded clamping rod 43 adapted to the threaded barrel 41, and one end of the ejector rod 42 is fixedly connected with a cambered ring block 44, and the air-drying structure 5 includes a driving gear 55 and two driven gears 58, the driving gear 55 is meshingly connected with the driven gear 58, one side of the driving gear 55 is fixedly connected with a driving blade 56, and one side of the driven gear 58 is fixedly connected with a driven blade 59, when the wind force of the driving blade 56 and the driven blade 59 blows downward, the wind force can be blown to the contact part of the ejector rod 42 and the finished product through the ejector rod 42 and other components, thereby accelerating cooling and avoiding deformation caused by insufficient hardness of the contact part due to excessive temperature during demolding.

[0038] Further, such as Figure 4-Figure 5 As shown: the inner wall of the protruding structure of the movable mold 1 is provided with a socket 46, and the ejector rod 42 can be inserted from the inner wall of the socket 46. The ejector rod 42 is inserted into the socket 46 on the movable mold 1 to complete the ejection of the injection molded product. The ejector rod 42 and the threaded barrel 41 are both hollow structures. The inner wall of the arc surface ring block 44 is provided with a circular through hole 45 connected to the inner wall of the ejector rod 42. Under the action of the hollow structure of the ejector rod 42 and the threaded barrel 41, the circular through hole 45 opened on the arc surface ring block 44 can be cooperated, so that the ejector rod 42 can become an "air duct", and then the wind fanned out by the active fan blades 56 and the driven fan blades 59 can be blown to the injection molded product.

[0039] The above solution also has the problem that the wind direction blown by the active fan blades 56 is fixed, resulting in weak wind force at the top and bottom. Figure 6 As shown: In this solution, both sides of the stripping plate 3 are fixedly connected with L-shaped connecting rods 51, and one end of the L-shaped connecting rod 51 away from the stripping plate 3 is fixedly connected with a mounting plate 52, and a driving motor 53 is fixedly installed on one side of the mounting plate 52. The output end of the driving motor 53 is fixedly connected with an active rod 54, and one end of the active rod 54 is fixedly connected to one side of a driving gear 55. One side of the mounting plate 52 is located at the top and bottom of the active rod 54 and is symmetrically rotatably connected with a driven rod 57, and one end of the two driven rods 57 is respectively connected to one end of two driven gears 58. The driving motor 53 is fixedly connected to the side, and can drive the active rod 54 to rotate, and can also drive the active gear 55 to rotate. The active gear 55 is meshed with the driven gear 58, so it can simultaneously drive the driven gear 58 and the driven rod 57 to rotate, and then can drive the active fan blades 56 and the driven fan blades 59 to rotate at the same time, thereby avoiding the situation that the wind force of a single active fan blade 56 is limited and dispersed, resulting in weak wind force at the top and bottom affecting air drying, and then can cooperate with the ejector rod 42 and other components to accelerate the air drying of the contact parts of the finished product.

[0040] The above solution also has the problem that dust easily accumulates on the inner wall of the air outlet 510 and the threaded tube 41 when not in use. Figure 7 As shown, an air outlet 510 is provided on one side of the stripping template 3, and the air outlet 510 is connected to the interior of the threaded barrel 41. The dustproof structure 9 includes a plurality of round clamping rods 92, one side of the round clamping rod 92 is fixedly connected to a dustproof plate 91, and the other side of the round clamping rod 92 is provided with a round clamping groove 93, the inner wall of the round clamping groove 93 is clamped with a round clamping block 94, and one side of the outer surface of the round clamping block 94 is fixedly connected with a stopper 95. The round clamping rod 92 can pass through the inner wall of the air outlet 510, and the round clamping rod 92 can block the air outlet 510 and the threaded barrel 41 when they are not in use, and then under the action of the round clamping block 94 and the round clamping groove 93, the round clamping rod 92 is prevented from separating, so as to prevent the air outlet 510 and the threaded barrel 41 from falling into dust when not in use, and to prevent the dust from being blown to the finished product and causing the finished product to be dirty when it is used again.

[0041] Working principle:

[0042] like Figure 1-7 As shown:

[0043] When in use: after the fixed mold 2 and the movable mold 1 have finished shaping, the movable mold 1 will be driven away from the fixed mold 2 by the external driving structure. At this time, the first mounting frame 6 and the second mounting frame 8 will move toward each other under the drive of the external driving structure. At this time, the first mounting frame 6 can drive the export rod 7 to push the finished product to attach to the protruding structure of the movable mold 1;

[0044] The threaded clamping rods 43 on the required number of ejector rods 42 are previously rotated and fixed to the inner wall of the threaded barrel 41, and the circular through holes 45 opened according to the shape of the irregular workpiece are aligned with the ejector rods 42;

[0045] Under the action of the second mounting frame 8, the stripping plate 3 can be driven to move, and then the ejector rod 42 can be driven to move, so that the ejector rod 42 can eject the product from the outer surface of the movable mold 1;

[0046] While working, the driving motor 53 is started, so that the driving motor 53 can drive the active rod 54 to rotate, and then drive the driven rod 57 to rotate, and then drive the active gear 55 and the driven gear 58 to rotate, and then drive the active blade 56 and the driven blade 59 to rotate, and then the wind can be blown to the air outlet 510, and then pass through the threaded cylinder 41, the ejector rod 42 and the inside of the arc surface ring block 44, and blow to the contact part between the ejector rod 42 and the product to accelerate cooling;

[0047] When not in use: separate the threaded clamping rod 43 on the ejection rod 42 from the threaded tube 41, and then disassemble the ejection rod 42. At this time, clamp the round clamping rod 92 into the air outlet 510 and the inner wall of the threaded tube 41. At this time, the round clamping block 94 can be clamped into the round clamping groove 93, thereby sealing the air outlet 510 and the inner wall of the threaded tube 41 to prevent dust.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A demoulding mechanism for injection molding of irregular workpieces, comprising a demoulding plate (3), an adjustable demoulding structure (4), a movable mold (1) and a fixed mold (2), characterized in that: A guide rod (7) is slidably mounted on the inner wall of the fixed mold (2), one side of the guide rod (7) is fixedly connected to a first mounting frame (6), and the first mounting frame (6) is fixedly mounted to an external hydraulic pushing device; The demoulding adjustment structure (4) is arranged on one side of the demoulding plate (3), and the other side of the demoulding plate (3) is provided with an air-drying structure (5); A dustproof structure (9) that can be separated from the stripping plate (3) is provided on one side of the stripping plate (3) and is located between the stripping plate (3) and the adjustable stripping structure (4); a second mounting frame (8) is fixedly connected to one side of the stripping plate (3) located on the dustproof structure (9); The adjustable demoulding structure (4) comprises an adjustable number of ejector rods (42) and a threaded barrel (41) for mounting the ejector rods (42), one end of the ejector rod (42) being fixedly connected to a threaded clamping rod (43) adapted to the threaded barrel (41), and one end of the ejector rod (42) being fixedly connected to a curved ring block (44); The air-drying structure (5) comprises a driving gear (55) and two driven gears (58), wherein the driving gear (55) and the driven gears (58) are meshingly connected, a driving blade (56) is fixedly connected to one side of the driving gear (55), and a driven blade (59) is fixedly connected to one side of the driven gear (58).

2. The demoulding mechanism for injection molding of irregular workpieces according to claim 1, characterized in that: An insertion hole (46) is provided on the inner wall of the protruding structure of the movable mold (1), and the ejector rod (42) can be inserted from the inner wall of the insertion hole (46).

3. The demoulding mechanism for injection molding of irregular workpieces according to claim 1, characterized in that: The ejector rod (42) and the threaded cylinder (41) are both hollow structures, and the inner wall of the arc surface ring block (44) is provided with a circular through hole (45) which is connected to the inner wall of the ejector rod (42).

4. The demoulding mechanism for injection molding of irregular workpieces according to claim 1, characterized in that: Both sides of the stripper plate (3) are fixedly connected with L-shaped connecting rods (51), one end of the L-shaped connecting rod (51) away from the stripper plate (3) is fixedly connected with a mounting plate (52), and one side of the mounting plate (52) is fixedly mounted with a driving motor (53).

5. The demoulding mechanism for injection molding of irregular workpieces according to claim 4, characterized in that: An active rod (54) is fixedly connected to the output end of the driving motor (53), and one end of the active rod (54) is fixedly connected to one side of a driving gear (55).

6. The demoulding mechanism for injection molding of irregular workpieces according to claim 5, characterized in that: One side of the mounting plate (52) is symmetrically rotatably connected to the top and bottom of the active rod (54) with a driven rod (57), and one end of the two driven rods (57) is fixedly connected to one side of two driven gears (58) respectively.

7. The demoulding mechanism for injection molding of irregular workpieces according to claim 4, characterized in that: An air outlet (510) is provided on one side of the stripping plate (3), and the air outlet (510) is communicated with the interior of the threaded cylinder (41); The dustproof structure (9) comprises a plurality of circular clamping rods (92), one side of the circular clamping rod (92) is fixedly connected to a dustproof plate (91), the other side of the circular clamping rod (92) is provided with a circular clamping groove (93), the inner wall of the circular clamping groove (93) is clamped with a circular clamping block (94), and one side of the outer surface of the circular clamping block (94) is fixedly connected to a stopper (95); The round clamping rod (92) can pass through the inner wall of the air outlet (510).

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