Multidirectional ejection mechanism of injection mold

Abstract

The multi-directional ejection mechanism comprises a movable mold, a cavity is formed in the top surface of the movable mold, a fixed cylinder and a limiting block are fixedly connected into the movable mold, a fixed frame is fixedly connected to the bottom end of the inner surface of the fixed cylinder, and a first piston is slidably connected to the inner surface of the fixed cylinder in a sleeving mode; the mold has the advantages that deformation of the plastic part under the action of ejection force is avoided, the plastic part is not easy to damage, whether the surface of the cavity is an arc-shaped surface or not does not need to be considered, the force applied by the ejection rod to the plastic part always vertically faces the fixed mold, the ejection rod is prevented from damaging the plastic part, meanwhile, distribution of the ejection rod does not need to be meticulously designed, and the plastic part cannot incline due to stress; compared with the prior art, the injection mold has the advantages that the difficulty of mold design is reduced, particularly asymmetric plastic parts can be ejected, the purpose of multi-directional ejection can be achieved, the plastic parts can be automatically trimmed, the influence of stress bulges on the plastic parts is reduced, the adjustment of ejection force is ensured, and the quality of the plastic parts is not influenced.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding ejection, in particular to a multi-directional ejection mechanism for an injection mold. Background Art

[0002] The ejection process of injection molded parts is one of the key steps in the injection molding process. It occurs after the plastic melt is completely solidified in the mold. The ejection process mainly pushes the ejector plate to allow the ejector pin to eject the product from the mold. Specifically, when the plastic melt in the mold is solidified and shaped, the mold will be opened. At this time, the ejector plate begins to move, pushing the ejector pin to apply force to the product, causing it to gradually detach from the mold cavity. In order to ensure that the product can be ejected smoothly and completely, the ejection process usually needs to be carefully designed, including the layout of the ejector pin, the size and direction of the ejection force and other factors that need to be considered.

[0003] After searching, Chinese patent application CN211591101U discloses a multi-directional pneumatic assisted precise vertical ejection mechanism for injection molds. Although the ejector rod always maintains a perpendicular position to the cavity and has good verticality, ensuring that the product will not tip over during ejection, improving the ejection accuracy and reducing the ejection error rate, when the cavity is spherical, the ejector rods of this application will all face the center of the sphere, so that the thrust applied by the ejector rods is concentrated toward the center of the sphere. Although the plastic part can be ejected, the force applied to the plastic part will cause the overall deformation of the plastic part and even damage the side wall of the plastic part. Therefore, when the plastic part is ejected, especially the ejection of the curved surface plastic part, the force applied by the ejector rod to the plastic part should be vertically toward the fixed mold to avoid the ejector rod damaging the plastic part, and the distribution of the ejector rods needs to be carefully designed to avoid the asymmetry of the ejection force, which not only increases the difficulty of mold design, but also makes the design more complicated, especially the ejection of asymmetric plastic parts, and cannot achieve the purpose of multi-directional ejection. Summary of the invention

[0004] The object of the present invention is to provide a multi-directional ejection mechanism for an injection mold.

[0005] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a multi-directional ejection mechanism of an injection mold, comprising a movable mold, a mold cavity is formed on the top surface of the movable mold, and a fixed cylinder and a limit block are fixedly connected in the movable mold, a fixed frame is fixedly connected to the bottom end of the inner surface of the fixed cylinder, and a first piston is slidably sleeved on the inner surface of the fixed cylinder, a push rod is fixedly connected to the top surface of the first piston, a limit groove is formed on the outer surface of the push rod, and a first closed cavity is formed on the central axis of the push rod, a second piston is slidably sleeved in the first closed cavity, a fixed rod is fixedly connected to the bottom surface of the second piston, the fixed rod is fixedly connected to the fixed frame, the top surface of the first closed cavity is connected to one end of a first connecting pipe, the other end of the first connecting pipe is fixedly sleeved with a first contact block, the top surface of the push rod is fixedly connected to a first hinge block, the bottom surface of the first contact block is fixedly connected to a second hinge block, and the second hinge block is rotatably connected to the first hinge block through a hinge shaft; A second closed cavity is provided on the top surface of the first contact block, and a third closed cavity is provided on the top of the first contact block, the end surface of the hinge shaft is fixedly connected with a driving bevel gear, the outer surface of the driving bevel gear is meshedly connected with a driven bevel gear, one end of the transmission shaft is fixedly connected to the central axis of the driven bevel gear, and the other end of the transmission shaft is fixedly connected to a stopper, a rotating cavity is provided in the first hinge block, the stopper is rotatably connected to the bottom surface of the rotating cavity, and a first connecting path is provided on the bottom surface of the rotating cavity, the first connecting path passes through the push rod, the top surface of the rotating cavity is connected with one end of the second connecting pipe, the other end of the second connecting pipe is connected with a pneumatic push rod, the output end of the pneumatic push rod is fixedly connected with a telescopic rod, the top surface of the telescopic rod is fixedly connected with a second contact block, the top surface of the second contact block is provided with an auxiliary cavity, and a multi-stage telescopic sleeve is provided on the outer sleeve of the second contact block.

[0006] As a further solution of the present invention: the push rod is slidably sleeved with the limit block, the limit groove is embedded in the limit block, the fixing frame is arranged in a herringbone shape, the first connecting pipe surrounds the first hinge block and the second hinge block, and the first connecting channel is connected to the fixing tube.

[0007] As a further solution of the present invention: the end face of the pneumatic push rod is fixedly connected to the side wall of the second closed cavity, the telescopic rod is slidably connected to the bottom surface of the second closed cavity, the second contact block is slidably sleeved to the second closed cavity, and the multi-stage telescopic sleeve is located between the second contact block and the second closed cavity.

[0008] As a further solution of the present invention: the driving bevel gear and the driven bevel gear are both rotatably sleeved with the first hinge block, and the cross section of the first connecting channel and the stop block are both arranged in a semicircular shape.

[0009] As a further solution of the present invention: one end of the second connecting tube is fixedly sleeved with the first hinge block, the other end of the second connecting tube is fixedly sleeved with the first contact block, the auxiliary cavity is wedge-shaped, and the auxiliary cavity extends outside the side wall of the second contact block.

[0010] As a further solution of the present invention: an air gathering channel is opened between the third closed chamber and the first connecting tube, the top end of the first connecting tube is connected to the air gathering channel, a third piston is slidably sleeved in the third closed chamber, one end of a pressure rod is fixedly connected to the end surface of the third piston, the other end of the pressure rod is in contact with one end of a connecting rod, the other end of the connecting rod is fixedly connected to a cutter, and a second connecting channel is connected between the third closed chamber and the second closed chamber.

[0011] As a further solution of the present invention: the gas gathering channel is arranged in a U shape, the pressure rod is slidably sleeved with the first contact block, and the connecting rod is arranged in a Z shape.

[0012] As a further solution of the present invention: the connecting rod and the cutter are both slidably sleeved with the second contact block, and the cutter can extend into the auxiliary cavity.

[0013] Adopting the above technical solution: Compared with the prior art, the beneficial effects of the present invention are: The compressed air in the fixed cylinder of the present invention can be transported to the rotating cavity through the bottom end of the first connecting channel, and enters the second connecting tube from the rotating cavity, so that the pneumatic push rod connected to the second connecting tube is extended, so that the pneumatic push rod pushes the telescopic rod to rise along the top surface of the second closed cavity, and then the telescopic rod applies an upward thrust parallel to the contact surface to the second contact block, and the auxiliary cavity on the second contact block can be filled with molten material during the injection molding stage, so that a force-bearing protrusion is formed on the surface of the plastic part, so that the upward thrust of the second contact block parallel to the contact surface is applied to the plastic part through the force-bearing protrusion, and the force applied by the first contact block to the plastic part is perpendicular to the contact surface and inclined upward. The resultant force of the two forces after the force is decomposed is vertically upward, that is, perpendicular to the end face of the movable mold, so that the plastic part is prevented from being deformed under the action of the ejection force, so that the plastic part is not easily damaged. There is no need to consider whether the cavity surface is an arc surface. The force applied by the ejector rod to the plastic part is always vertically toward the fixed mold, so as to prevent the ejector rod from damaging the plastic part.

[0014] The present invention is connected with the air gathering channel through the second connecting channel, so that compressed air is transported to the second closed cavity through the second connecting channel, so that the air pressure in the second closed cavity is increased, and the second contact block is ejected, so that the auxiliary cavity on the second contact block is exposed to the outside, and the auxiliary cavity is wedge-shaped, so that the force-bearing protrusion can slide from the auxiliary cavity to avoid affecting the subsequent injection molding of plastic parts, so that the ejection force of the plastic parts is vertically toward the fixed mold, and there is no need to carefully design the distribution of the ejector rod, and the plastic parts cannot be tilted by force. Not only does it reduce the difficulty of mold design, especially the ejection of asymmetric plastic parts, but it can also achieve the purpose of multi-directional ejection.

[0015] The present invention gradually raises the push rod so that the first closed chamber on the push rod gradually disengages from the second piston until the second piston completely moves out of the first closed chamber. At this time, the first closed chamber is connected to the fixed cylinder, so that the compressed air in the fixed cylinder can be transported to the gas gathering channel through the first connecting pipe on the top surface of the first closed chamber, and enter the third closed chamber through the gas gathering channel, so that the third piston in the third closed chamber is pressed and translated, so that the pressure rod on the third piston pushes the connecting rod, so that the connecting rod drives the cutter to extend into the auxiliary chamber, and then the cutter cuts off the force-bearing protrusion, so that the plastic part can fall naturally, so as to achieve the purpose of automatically trimming the plastic part, reduce the influence of the force-bearing protrusion on the plastic part, ensure the adjustment of the ejection force, and do not affect the quality of the plastic part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a multi-directional ejection mechanism of an injection mold of the present invention; Figure 2 A half-section schematic diagram of a movable mold structure in an embodiment of the present invention; Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure of part A; Figure 4 A half-section schematic diagram of a fixed cylinder structure in an embodiment of the present invention; Figure 5 A half-section schematic diagram of a first contact block structure in an embodiment of the present invention; Figure 6 In the embodiment of the present invention Figure 5 A magnified view of the structure of part B; Figure 7 A half-section schematic diagram of a top rod structure in an embodiment of the present invention; Figure 8 In the embodiment of the present invention Figure 7 A magnified view of the structure of part C in the middle; Fig. 9 Schematic diagram of the hinge shaft structure in an embodiment of the present invention.

[0017] In the figure: 1, movable mold; 2, mold cavity; 3, fixed cylinder; 4, limit block; 5, fixed frame; 6, first piston; 7, ejector rod; 8, limit groove; 9, first closed cavity; 10, second piston; 11, fixed rod; 12, first connecting pipe; 13, first contact block; 14, first hinge block; 15, second hinge block; 16, hinge shaft; 17, active bevel gear; 18, driven bevel gear; 19, transmission shaft; 20, stopper; 21, rotating cavity; 22, first connecting channel; 23, second connecting pipe; 24, pneumatic push rod; 25, telescopic rod; 26, second contact block; 27, auxiliary cavity; 28, multi-stage telescopic sleeve; 29, second closed cavity; 30, gas gathering channel; 31, third closed cavity; 32, third piston; 33, pressure rod; 34, connecting rod; 35, cutter; 36, second connecting channel. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0019] See also Figure 5-Figure 9 The present invention provides a technical solution: a multi-directional ejection mechanism of an injection mold, wherein a second closed cavity 29 is formed on the top surface of a first contact block 13, and a third closed cavity 31 is formed on the top of the first contact block 13, a driving bevel gear 17 is fixedly connected to the end surface of a hinge shaft 16, a driven bevel gear 18 is meshedly connected to the outer surface of the driving bevel gear 17, one end of a transmission shaft 19 is fixedly connected to the central axis of the driven bevel gear 18, a stopper 20 is fixedly connected to the other end of the transmission shaft 19, and a rotating cavity 21 is formed in the first hinge block 14 The stopper 20 is rotatably connected to the bottom surface of the rotating chamber 21, and a first connecting channel 22 is provided on the bottom surface of the rotating chamber 21, and the first connecting channel 22 passes through the push rod 7. The top surface of the rotating chamber 21 is connected to one end of a second connecting pipe 23, and the other end of the second connecting pipe 23 is connected to a pneumatic push rod 24. A telescopic rod 25 is fixedly connected to the output end of the pneumatic push rod 24, and a second contact block 26 is fixedly connected to the top surface of the telescopic rod 25. An auxiliary cavity 27 is provided on the top surface of the second contact block 26, and a multi-stage telescopic sleeve 28 is provided on the outer sleeve of the second contact block 26.

[0020] See also Figure 5 and Figure 6 The end face of the pneumatic push rod 24 is fixedly connected to the side wall of the second closed cavity 29, the telescopic rod 25 is slidably connected to the bottom surface of the second closed cavity 29, the second contact block 26 is slidably sleeved with the second closed cavity 29, and the multi-stage telescopic sleeve 28 is located between the second contact block 26 and the second closed cavity 29.

[0021] See also Figure 5 , Figure 8 and Fig. 9 The driving bevel gear 17 and the driven bevel gear 18 are both rotatably sleeved with the first hinge block 14, and the cross section of the first connecting channel 22 and the stopper 20 are both semicircular.

[0022] See also Figure 5 and Figure 8 One end of the second connecting tube 23 is fixedly sleeved with the first hinge block 14 , and the other end of the second connecting tube 23 is fixedly sleeved with the first contact block 13 . The auxiliary cavity 27 is wedge-shaped and extends outside the side wall of the second contact block 26 .

[0023] Specifically, before the movable mold 1 is used, the top surface of the first contact block 13 is made to fit the inner surface of the cavity 2, and the first hinge block 14 is fixed to the second hinge block 15. During this process, if the inner surface of the cavity 2 to which the first contact block 13 fits is an arc surface, the first contact block 13 and the second hinge block 15 rotate around the central axis of the hinge shaft 16, so that the first contact block 13 rotates until the first contact block 13 fits the cavity 2, and the rotation of the second hinge block 15 will drive the hinge shaft 16 and the active bevel gear 17 to rotate, so that the active bevel gear 17 is rotated. 7 drives the driven bevel gear 18 to rotate, so that the transmission shaft 19 on the driven bevel gear 18 drives the stopper 20 to rotate, so that the stopper 20 gradually opens the top of the first connecting channel 22 until the first contact block 13 stops moving. When it is necessary to eject the plastic part, air is supplied to the fixed cylinder 3 through the air channel in the movable mold 1, so that the air pressure in the fixed cylinder 3 increases and pushes the first piston 6 to rise, so that the push rod 7 on the first piston 6 pushes the first hinge block 14 and the second hinge block 15 to rise, so that the first contact block 13 on the second hinge block 15 rises , so that the first contact block 13 ejects the plastic part. During this process, the compressed air in the fixed cylinder 3 can be delivered to the rotating cavity 21 through the bottom end of the first connecting channel 22, and enter the second connecting pipe 23 from the rotating cavity 21, so that the pneumatic push rod 24 connected to the second connecting pipe 23 is extended, so that the pneumatic push rod 24 pushes the telescopic rod 25 to rise along the top surface of the second closed cavity 29, and then the telescopic rod 25 applies a thrust parallel to the contact surface to the second contact block 26. The auxiliary cavity 27 on the second contact block 26 can be filled during the injection molding stage. The molten material is filled to form a force-bearing protrusion on the surface of the plastic part, so that the upward thrust of the second contact block 26 parallel to the contact surface is applied to the plastic part through the force-bearing protrusion, and the force applied to the plastic part by the first contact block 13 is perpendicular to the contact surface and inclined upward. The resultant force after the two forces are decomposed is vertically upward, that is, perpendicular to the end face of the movable mold 1, so that the plastic part is prevented from being deformed under the action of the ejection force, making the plastic part not easily damaged. There is no need to consider whether the surface of the cavity 2 is an arc surface. The force applied by the ejector rod 7 to the plastic part is always vertically toward the fixed mold, so as to prevent the ejector rod 7 from damaging the plastic part. Example 2

[0024] See also Figure 1-Figure 5 The present invention provides a technical solution: a multi-directional ejection mechanism of an injection mold, comprising a movable mold 1, a cavity 2 is formed on the top surface of the movable mold 1, a fixed cylinder 3 and a limit block 4 are fixedly connected in the movable mold 1, a fixed frame 5 is fixedly connected to the bottom end of the inner surface of the fixed cylinder 3, and a first piston 6 is slidably sleeved on the inner surface of the fixed cylinder 3, a push rod 7 is fixedly connected to the top surface of the first piston 6, a limit groove 8 is formed on the outer surface of the push rod 7, and a first closed cavity 9 is formed on the central axis of the push rod 7, and the first closed cavity 9 is slidably sleeved with a second piston 10, a fixing rod 11 is fixedly connected to the bottom surface of the second piston 10, and the fixing rod 11 is fixedly connected to the fixing frame 5. The top surface of the first closed chamber 9 is connected to one end of a first connecting pipe 12, and a first contact block 13 is fixedly sleeved on the other end of the first connecting pipe 12. A first hinge block 14 is fixedly connected to the top surface of the push rod 7, and a second hinge block 15 is fixedly connected to the bottom surface of the first contact block 13. The second hinge block 15 is rotatably connected to the first hinge block 14 through a hinge shaft 16.

[0025] See also Figure 4 and Figure 5 The push rod 7 is slidably connected with the limit block 4, the limit groove 8 is engaged with the limit block 4, the fixing frame 5 is arranged in a herringbone shape, the first connecting pipe 12 surrounds the first hinge block 14 and the second hinge block 15, and the first connecting channel 22 is connected with the fixing tube 3.

[0026] Specifically, in the process of the second connecting channel 36 being connected with the gas gathering channel 30, the compressed air is transported to the second closed cavity 29 through the second connecting channel 36, so that the air pressure in the second closed cavity 29 increases, and the second contact block 26 is ejected, so that the auxiliary cavity 27 on the second contact block 26 is exposed to the outside, and the auxiliary cavity 27 is wedge-shaped, so that the force-bearing protrusion can slide from the auxiliary cavity 27 to avoid affecting the subsequent injection molding of the plastic part, so that the ejection force of the plastic part is vertically toward the fixed mold, and there is no need to carefully design the distribution of the ejector pin 7. The plastic part cannot be tilted by the force, which not only reduces the difficulty of mold design, especially the ejection of asymmetric plastic parts, but also can achieve the purpose of multi-directional ejection. Example 3

[0027] See also Figure 5 , Figure 6 and Figure 8 The present invention provides a technical solution: a multi-directional ejection mechanism for an injection mold, wherein a gas gathering channel 30 is provided between a third closed cavity 31 and a first connecting tube 12, the top end of the first connecting tube 12 is connected to the gas gathering channel 30, a third piston 32 is slidably sleeved in the third closed cavity 31, one end of a pressure rod 33 is fixedly connected to the end surface of the third piston 32, the other end of the pressure rod 33 contacts one end of a connecting rod 34, the other end of the connecting rod 34 is fixedly connected to a cutter 35, and a second connecting channel 36 is connected between the third closed cavity 31 and the second closed cavity 29.

[0028] See also Figure 5 , Figure 6 and Figure 8 The gas gathering channel 30 is arranged in a U shape, the pressure rod 33 is slidably sleeved with the first contact block 13, and the connecting rod 34 is arranged in a Z shape.

[0029] See also Figure 8 The connecting rod 34 and the cutter 35 are both slidably connected to the second contact block 26 , and the cutter 35 can extend into the auxiliary cavity 27 .

[0030] Specifically, in the process of the push rod 7 gradually rising, the first closed chamber 9 on the push rod 7 gradually disengages from the second piston 10 until the second piston 10 completely moves out of the first closed chamber 9. At this time, the first closed chamber 9 is connected to the fixed cylinder 3, so that the compressed air in the fixed cylinder 3 can be transported to the gas gathering channel 30 by the first connecting pipe 12 on the top surface of the first closed chamber 9, and enter the third closed chamber 31 from the gas gathering channel 30, so that the third piston 32 in the third closed chamber 31 is pressed and translated, so that the pressure rod 33 on the third piston 32 pushes the connecting rod 34, so that the connecting rod 34 drives the cutter 35 to extend into the auxiliary chamber 27, and then the cutter 35 cuts off the force-bearing protrusion, so that the plastic part can fall naturally, so as to achieve the purpose of automatically trimming the plastic part, reduce the influence of the force-bearing protrusion on the plastic part, ensure the adjustment of the ejection force, and do not affect the quality of the plastic part.

[0031] The working principle and use process of the present invention are as follows: before the movable mold 1 is used, the top surface of the first contact block 13 is made to fit the inner surface of the cavity 2, and the first hinge block 14 is fixed to the second hinge block 15. During this process, if the inner surface of the cavity 2 fitted by the first contact block 13 is an arc surface, the first contact block 13 and the second hinge block 15 rotate around the central axis of the hinge shaft 16, so that the first contact block 13 rotates until the first contact block 13 fits the cavity 2, and the rotation of the second hinge block 15 will drive the hinge shaft 16 and the active bevel gear 17 to rotate, so that The active bevel gear 17 drives the driven bevel gear 18 to rotate, so that the transmission shaft 19 on the driven bevel gear 18 drives the stopper 20 to rotate, so that the stopper 20 gradually opens the top of the first connection channel 22 until the first contact block 13 stops moving. When it is necessary to eject the plastic part, air is supplied to the fixed cylinder 3 through the air channel in the movable mold 1, so that the air pressure in the fixed cylinder 3 increases and pushes the first piston 6 to rise, so that the ejector rod 7 on the first piston 6 pushes the first hinge block 14 and the second hinge block 15 to rise, so that the first contact block 13 on the second hinge block 15 is moved. The block 13 rises, so that the first contact block 13 ejects the plastic part. In this process, the compressed air in the fixed cylinder 3 can be transported to the rotating cavity 21 through the bottom end of the first connecting channel 22, and enters the second connecting pipe 23 from the rotating cavity 21, so that the pneumatic push rod 24 connected to the second connecting pipe 23 is extended, so that the pneumatic push rod 24 pushes the telescopic rod 25 to rise along the top surface of the second closed cavity 29, and then the telescopic rod 25 applies a thrust parallel to the contact surface to the second contact block 26, and the auxiliary cavity 27 on the second contact block 26 is in the injection stage. The molten material can be filled to form a force-bearing protrusion on the surface of the plastic part, so that the thrust of the second contact block 26 parallel to the contact surface is applied to the plastic part through the force-bearing protrusion, and the force applied to the plastic part by the first contact block 13 is perpendicular to the contact surface and inclined upward. The resultant force after the two forces are decomposed is vertically upward, that is, perpendicular to the end face of the movable mold 1, so that the plastic part is prevented from being deformed under the action of the ejection force, so that the plastic part is not easily damaged. There is no need to consider whether the surface of the cavity 2 is an arc surface. The force applied by the ejector rod 7 to the plastic part is always vertically toward the fixed mold, so as to prevent the ejector rod 7 from damaging the plastic part; When the ejector rod 7 gradually rises, the first sealed chamber 9 on the ejector rod 7 gradually separates from the second piston 10 until the second piston 10 completely moves out of the first sealed chamber 9. At this time, the first sealed chamber 9 is connected with the fixed cylinder 3, so that the compressed air in the fixed cylinder 3 can be transported to the gas collecting channel 30 through the first connecting pipe 12 on the top surface of the first sealed chamber 9, and enter the third sealed chamber 31 through the gas collecting channel 30, so that the third piston 32 in the third sealed chamber 31 is pressed and translated, so that the pressure rod 33 on the third piston 32 pushes the connecting rod 34, so that the connecting rod 34 drives the cutter 35 to extend into the auxiliary chamber 27, and then the cutter 35 cuts off the force-bearing protrusion, so that the plastic part can fall naturally, so as to achieve the purpose of automatically trimming the plastic part, reduce the influence of the force-bearing protrusion on the plastic part, ensure the adjustment of the ejection force, and do not affect the quality of the plastic part; When the third piston 32 moves to the end of the third closed chamber 31, the second connecting channel 36 is connected with the gas gathering channel 30, so that the compressed air is transported to the second closed chamber 29 through the second connecting channel 36, so that the air pressure in the second closed chamber 29 increases, and the second contact block 26 is ejected, so that the auxiliary chamber 27 on the second contact block 26 is exposed to the outside, and the auxiliary chamber 27 is wedge-shaped, so that the force-bearing protrusion can slide from the auxiliary chamber 27 to avoid affecting the subsequent injection molding of the plastic part, so that the ejection force of the plastic part is vertically directed toward the fixed mold, and there is no need to carefully design the distribution of the ejector rod 7. The plastic part cannot be tilted by force, which not only reduces the difficulty of mold design, especially the ejection of asymmetric plastic parts, but also can achieve the purpose of multi-directional ejection to complete the operation.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A multi-directional ejection mechanism for an injection mold, characterized in that: The invention comprises a movable mold (1), wherein a mold cavity (2) is formed on the top surface of the movable mold (1), and a fixed cylinder (3) and a limit block (4) are fixedly connected inside the movable mold (1), a fixed frame (5) is fixedly connected to the bottom end of the inner surface of the fixed cylinder (3), and a first piston (6) is slidably sleeved on the inner surface of the fixed cylinder (3), a push rod (7) is fixedly connected to the top surface of the first piston (6), a limit groove (8) is formed on the outer surface of the push rod (7), and a first sealed cavity (9) is formed on the central axis of the push rod (7), and a second piston (10) is slidably sleeved inside the first sealed cavity (9). The bottom surface of the second piston (10) is fixedly connected to a fixing rod (11), the fixing rod (11) is fixedly connected to the fixing frame (5), the top surface of the first closed chamber (9) is connected to one end of a first connecting tube (12), the other end of the first connecting tube (12) is fixedly sleeved with a first contact block (13), the top surface of the push rod (7) is fixedly connected to a first hinge block (14), the bottom surface of the first contact block (13) is fixedly connected to a second hinge block (15), and the second hinge block (15) is rotatably connected to the first hinge block (14) via a hinge shaft (16); A second sealed cavity (29) is formed on the top surface of the first contact block (13), and a third sealed cavity (31) is formed on the top end of the first contact block (13); a driving bevel gear (17) is fixedly connected to the end surface of the hinge shaft (16); a driven bevel gear (18) is meshingly connected to the outer surface of the driving bevel gear (17); one end of a transmission shaft (19) is fixedly connected to the central axis of the driven bevel gear (18); a stopper (20) is fixedly connected to the other end of the transmission shaft (19); a rotating cavity (21) is formed in the first hinge block (14); the stopper (20) and the bottom surface of the rotating cavity (21) are connected to each other. The rotating cavity (21) is rotatably connected, and a first connecting channel (22) is provided on the bottom surface of the rotating cavity (21), the first connecting channel (22) passes through the push rod (7), the top surface of the rotating cavity (21) is connected to one end of a second connecting tube (23), the other end of the second connecting tube (23) is connected to a pneumatic push rod (24), a telescopic rod (25) is fixedly connected to the output end of the pneumatic push rod (24), a second contact block (26) is fixedly connected to the top surface of the telescopic rod (25), an auxiliary cavity (27) is provided on the top surface of the second contact block (26), and a multi-stage telescopic sleeve (28) is provided on the outer cover of the second contact block (26).

2. The multi-directional ejection mechanism of an injection mold according to claim 1, characterized in that: The push rod (7) is slidably sleeved with the limit block (4), the limit groove (8) is engaged with the limit block (4), the fixing frame (5) is arranged in a herringbone shape, the first connecting pipe (12) surrounds the first hinge block (14) and the second hinge block (15), and the first connecting channel (22) is connected to the fixing cylinder (3).

3. The multi-directional ejection mechanism of an injection mold according to claim 1, characterized in that: The end surface of the pneumatic push rod (24) is fixedly connected to the side wall of the second closed cavity (29), the telescopic rod (25) is slidably connected to the bottom surface of the second closed cavity (29), the second contact block (26) is slidably sleeved to the second closed cavity (29), and the multi-stage telescopic sleeve (28) is located between the second contact block (26) and the second closed cavity (29).

4. The multi-directional ejection mechanism of an injection mold according to claim 1, characterized in that: The driving bevel gear (17) and the driven bevel gear (18) are both rotatably sleeved with the first hinge block (14), and the cross section of the first connecting channel (22) and the stop block (20) are both arranged in a semicircular shape.

5. The multi-directional ejection mechanism of an injection mold according to claim 1, characterized in that: One end of the second connecting tube (23) is fixedly sleeved with the first hinge block (14), and the other end of the second connecting tube (23) is fixedly sleeved with the first contact block (13). The auxiliary cavity (27) is arranged in a wedge shape, and the auxiliary cavity (27) extends outside the side wall of the second contact block (26).

6. The multi-directional ejection mechanism of an injection mold according to claim 1, characterized in that: A gas gathering channel (30) is provided between the third sealed chamber (31) and the first connecting tube (12); the top end of the first connecting tube (12) is connected to the gas gathering channel (30); a third piston (32) is slidably sleeved in the third sealed chamber (31); one end of a pressure rod (33) is fixedly connected to the end surface of the third piston (32); the other end of the pressure rod (33) contacts and is connected to one end of a connecting rod (34); the other end of the connecting rod (34) is fixedly connected to a cutter (35); and a second connecting channel (36) is provided between the third sealed chamber (31) and the second sealed chamber (29).

7. The multi-directional ejection mechanism of an injection mold according to claim 6, characterized in that: The gas gathering channel (30) is arranged in a U shape, the pressure rod (33) is slidably sleeved with the first contact block (13), and the connecting rod (34) is arranged in a Z shape.

8. The multi-directional ejection mechanism of an injection mold according to claim 6, characterized in that: The connecting rod (34) and the cutter (35) are both slidably sleeved with the second contact block (26), and the cutter (35) can extend into the auxiliary cavity (27).

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