Die ejector pin

Abstract

The invention relates to the technical field of mold ejector pins, in particular to a mold ejector pin which comprises a needle cylinder, a flat ejector pin is fixedly connected to the center of the outer surface of the upper end of the needle cylinder, one end of the flat ejector pin is an ejection end, the other end of the flat ejector pin is a fixed end, and V-shaped grooves are formed in the four faces of the flat ejector pin; a first compensation rod and a second compensation rod are arranged on the two sides of the flat ejector pin respectively, rectangular nail containing grooves are formed in the opposite sides of the first compensation rod and the second compensation rod, a first screw is installed on the arc-shaped outer side of the second compensation rod, and the first screw penetrates through the second compensation rod and is in threaded connection with the first compensation rod. A second screw is installed on the arc-shaped outer side of the end, close to the needle cylinder, of the second compensation rod, penetrates through the flat ejector pin and is in threaded connection with the first compensation rod. The integrated ejector pin is designed to be of an assembled structure, the ejector pin can be used as a flat ejector pin and can also be used as a round ejector pin after being assembled, the length of the ejector pin can be increased through mutual splicing, and the application range of the ejector pin is greatly widened.

Description

Technical Field

[0001] The invention relates to the technical field of mold ejector pins, in particular to a mold ejector pin. Background Art

[0002] When using molds to produce products, ejector pins are often used to eject the products in the mold because the products are often difficult to eject from the mold, thereby facilitating the demolding of the products from the mold. There are many types of ejector pins used in mold demolding, such as ejector pins, flat ejector pins, sleeve pins, etc., which are all used to eject the products for demolding. The flat ejector pin is also called a flat pin, and can also be called a push rod, inlay pin, middle pin, support pin, etc. It is mainly used for ejecting the rib part of plastic products and the long strip of glue position. When the round ejector pin cannot be placed, a flat ejector pin can be used.

[0003] In order to better ensure product quality when molds are used to produce some precision products, the products need to be automatically demolded after the mold is opened. If the product is difficult to demold, some parts of the product will stick to the mold and break, and the quality of the product cannot be guaranteed. In order to better demold the injection molded product, ejectors are often used to eject the product. Generally, cylindrical ejectors are commonly used, and flat ejectors are sometimes used due to the differences in injection molded parts. As a result, there are many types of ejectors used, and each mold must correspond to different types of ejectors, which greatly increases the manufacturing cost of the mold.

[0004] To this end, the present invention provides a mold ejector pin that can be combined to meet different ejection requirements. Summary of the invention

[0005] The object of the present invention is to provide a mold ejector pin, which solves the problem that there are many types of ejectors, resulting in high mold manufacturing costs and low replaceability.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a mold ejector, comprising a syringe, a flat ejector, a first compensation rod, a second compensation rod, a first screw and a second screw; a flat ejector is fixedly connected to the center of the outer surface of the upper end of the syringe, one end of the flat ejector is an ejection end, and the other end is a fixed end, and a plurality of parallel V-shaped grooves are provided on four sides of the flat ejector, one end of the V-shaped groove extends to the ejection end, and the other end of the V-shaped groove passes through the fixed end;

[0007] A first compensation rod is provided on one side of the flat ejector pin, and a second compensation rod is provided on the other side of the flat ejector pin. A rectangular nail accommodating groove for accommodating the flat ejector pin is provided on the opposite sides of the first compensation rod and the second compensation rod. A first screw is installed on the arcuate outer side of the second compensation rod, and the first screw passes through the second compensation rod and is threadedly connected to the first compensation rod; a second screw is installed on the arcuate outer side of one end of the second compensation rod close to the syringe, and the second screw passes through the flat ejector pin and is threadedly connected to the first compensation rod.

[0008] A fixing groove is provided at the center of the outer surface of the upper end of the syringe, and the fixed end of the flat ejector pin is inserted into the fixing groove. Two third screws are threadedly connected to the side surface of the syringe near the upper end, and one end of the third screw passes through the flat ejector pin and is threadedly connected to the inside of the syringe; a gap is set around the flat ejector pin and the inner wall of the fixing groove.

[0009] The through hole for the third screw to pass through on the flat ejector pin is a light hole, and an optical axis section matching the light hole is provided in the middle of the third screw. Both ends of the optical axis section are fine threads, which are screwed with the threaded hole on the syringe.

[0010] Two light holes are also provided on the side surface of the flat ejector near the upper end; a rectangular connecting block is fixedly connected to one side of the bottom surface of the flat ejector; a second threaded hole is provided at the center of the side surface of the connecting block; a second slot having the same shape as the connecting block is provided on the side of the bottom surface of the flat ejector located on the side of the connecting block; a first threaded hole is provided on the side surface of the flat ejector near the lower end, and the first threaded hole is connected to the second slot, and a screw is threaded in the first threaded hole.

[0011] A cavity is provided at the center of the outer surface of the lower end of the syringe, a round rod is arranged inside the cavity, the outer surface of the lower end of the round rod is fixedly connected to the bracket, and two fourth screws are threadedly connected to the side surface of the syringe near the lower end; scale lines are provided on one side of the outer cylindrical surface of the round rod; and a plane is provided on the other side of the outer cylindrical surface of the round rod.

[0012] A first slot is formed on a surface of the second compensation rod opposite to the first compensation rod near the upper end. A fixing block is disposed in the first slot. One end of the fixing block is fixedly connected to the first compensation rod.

[0013] The first slot is surrounded by and has a bottom with gaps between it and the fixing block, and the first compensation rod and the second compensation rod have the same first rigidity, the fixing block has a second rigidity, and the second rigidity is less than the first rigidity; the first screw includes a conical head and a threaded rod at the front end of the conical head, the second compensation rod is provided with a conical hole matching the shape of the conical head, the fixing block is provided with a threaded hole screwed with the threaded rod, and the fixing block is adhered to the end face of the first compensation rod by glue.

[0014] A partition groove passing through the axis of the tapered hole is formed on the arc outer surface of the second compensation rod, and the partition groove extends to the first clamping groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention designs an integrated ejector pin into an assembled structure, which can be used as a flat ejector pin or as a round ejector pin after assembly, and can also increase the ejector pin length by splicing each other, thereby greatly improving the application range of the ejector pin; at the same time, the present invention only needs to replace the damaged part and retain the part that is not easily damaged, thereby reducing the replacement cost of the ejector pin and having high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the installation of the present invention in a mold;

[0017] Figure 2 An exploded view of the present invention;

[0018] Figure 3 is a cross-sectional view of the present invention;

[0019] Figure 4 For the present invention Figure 3 A magnified view of the position in FIG.

[0020] Figure 5 For the present invention Figure 3 A magnified view of point B in FIG.

[0021] Figure 6 is a three-dimensional view of the flat ejector pin of the present invention;

[0022] Figure 7 is a three-dimensional view of another side of the flat ejector pin of the present invention;

[0023] Figure 8 It is a three-dimensional view of the syringe and the round rod of the present invention.

[0024] In the figure: 1, base; 2, ejector cylinder; 3, movable chamber; 4, support plate; 5, bracket; 6, syringe; 7, ejector pin; 71, flat ejector pin; 711, ejector end; 712, fixed end; 713, V-shaped groove; 72, first compensation rod; 73, second compensation rod; 731, tapered hole; 732, partition groove; 74, first screw; 741, tapered head; 742, threaded rod; 75, second screw; 7 6. Nail receiving groove; 8. Injection molded part; 9. Fixed mold; 10. Moving mold; 11. Injection port; 12. First slot; 13. Fixed block; 14. Fixed slot; 15. Third screw; 16. First threaded hole; 17. Second slot; 18. Connecting block; 19. Second threaded hole; 20. Light hole; 21. Cavity; 22. Round rod; 23. Fourth screw; 24. Prismatic groove; 25. Plane; 26. Scale line. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figures 1 to 8 The injection mold comprises a base 1, an active cavity 3 is provided inside the upper end of the base 1, a fixed mold 9 is fixedly connected to the outer surface of the upper end of the base 1, and a movable mold 10 is provided on the outer surface of the upper end of the fixed mold 9; an injection port 11 is provided at the center position of the upper outer surface of the movable mold 10; an ejection cylinder 2 is embedded and installed at the center position of the inner bottom of the active cavity 3, a support plate 4 is fixedly connected to the outer surface of the upper end of the ejection cylinder 2, a bracket 5 is embedded and installed at the inner center position of the support plate 4, and a syringe 6 is fixedly connected to the center position of the upper outer surface of the bracket 5; and an ejector pin 7; the ejector pin 7 is fixedly connected to the upper end of the syringe 6;

[0027] In order to better demould the injection molded product, an ejector pin is often used to eject the product. In the ejection and demoulding, depending on the shape of the product, a cylindrical ejector pin is sometimes used to eject the injection molded part 8, and a flat ejector pin is sometimes used. This results in a variety of ejector pins being used, which increases the cost of using the ejector pins. When producing the injection molded part 8, the injection material is injected into the injection port 11 to form the injection molded part 8 between the fixed mold 9 and the movable mold 10, and then the movable mold 10 is separated. At this time, the ejector cylinder 2 pushes the support plate 4 to move upward, driving the bracket 5 and the syringe 6 to move upward, and at the same time, the ejector pin 7 is driven to move upward and eject the injection molded part 8, which is convenient for demoulding the injection molded part 8. When a flat ejector pin is needed to eject the injection molded part 8, the ejector pin 7 of the present invention can be used. The ejector pin 7 of the present invention is a combination design of a flat ejector pin and a cylindrical ejector pin, so that the ejector pin 7 can be flexibly used in different injection molds. The movable cavity 3 of the present invention is to provide a movable space for the support plate 4 to facilitate the ejection and storage of the ejector pin 7.

[0028] like Figures 2 to 8As shown, a mold ejector disclosed in the present invention includes a syringe 6, a flat ejector 71, a first compensation rod 72, a second compensation rod 73, a first screw 74, a second screw 75 and a nail receiving groove 76; the flat ejector 71 is fixedly connected to the center position of the outer surface of the upper end of the syringe 6, and the flat ejector 71 is a rectangular structure. One end of the flat ejector 71 is an ejection end 711, and the other end is a fixed end 712. A plurality of parallel V-grooves 713 are provided on the four sides of the flat ejector 71, one end of the V-groove 713 extends to the ejection end 711, and the other end of the V-groove 713 passes through the fixed end 712; the V-groove 713 can transfer the heat of the mold during the injection molding process, can reduce the temperature of the mold, and can also reduce the contact between the mold and the flat ejector 71. The contact area between the flat ejector pin 71 and the mold is reduced, thereby reducing the heat transfer from the mold to the flat ejector pin 71, preventing the flat ejector pin 71 from expanding due to heat and being stuck in the ejector pin hole, so as to reduce the wear of the flat ejector pin 71; grease or solid lubricating medium can also be placed in the V-groove 713 to improve the lubrication effect between the flat ejector pin 71 and the mold, and to increase the service life of the flat ejector pin 71; the ejection end 711 can seal the V-groove 713 to prevent the injection liquid from entering the V-groove 713 and causing part injection defects. When the flat ejector pin 71 ejects the injection molded part 8 by a distance of the ejection end 711, the V-groove 713 can connect the outside with the space formed between the injection molded part 8 and the fixed mold 9, thereby reducing the negative pressure adsorption of the space on the injection molded part 8, which is conducive to the rapid demolding of the injection molded part 8;

[0029] The V-shaped groove 713 is formed by grinding wheel processing. The design of the V-shaped groove 713 also forms a rib structure on the surface of the flat ejector pin 71, thereby improving the rigidity of the flat ejector pin 71. The flat ejector pin 71 is not easy to bend during ejection work, and can perform long-distance ejection work; after the flat ejector pin 71 works for a long time, the metal debris worn between the flat ejector pin 71 and the mold can be collected and discharged by the V-shaped groove 713, thereby reducing the further wear caused by the metal debris between the flat ejector pin 71 and the contact surface of the mold;

[0030] A first compensation rod 72 is provided on one side of the flat ejector pin 71, and a second compensation rod 73 is provided on the other side of the flat ejector pin 71. A rectangular nail receiving groove 76 for accommodating the flat ejector pin 71 is provided on the opposite side of the first compensation rod 72 and the second compensation rod 73. A first screw 74 is installed on the arc-shaped outer side of the second compensation rod 73. The first screw 74 passes through the second compensation rod 73 and is threadedly connected to the first compensation rod 72. The first screw 74 fastens the second compensation rod 73 and the first compensation rod 72 together to form a complete cylinder for use as a cylindrical ejector pin; further, a second screw 75 is installed on the arc-shaped outer side of the end of the second compensation rod 73 close to the syringe 6. The second screw 75 passes through the flat ejector pin 71 and is threadedly connected to the first compensation rod 72 to achieve the fixation of the bottom of the first compensation rod 72 and the second compensation rod 73.

[0031] The flat ejector pin 71 is required when processing different injection molded parts 8. The present invention requires the operator to unscrew the first screw 74 and the second screw 75, and then remove the first compensation rod 72 and the second compensation rod 73 respectively, so as to obtain the flat ejector pin 71. When the syringe 6 moves upward, the flat ejector pin 71 can be driven to eject the injection molded part 8. When a cylindrical ejector pin is needed, the nail receiving grooves 76 on the first compensation rod 72 and the second compensation rod 73 are both clamped on the flat ejector pin 71, and then the first screw 74 and the second screw 75 are tightened at the upper and lower ends of the second compensation rod 73 respectively to fix the first compensation rod 72 and the second compensation rod 73 to form a cylindrical ejector pin to adapt to the ejection of other types of injection molded parts, thereby improving the flexibility of the ejector pin and reducing the cost of the ejector pin.

[0032] As an embodiment of the present invention, a fixing groove 14 is provided at the center of the outer surface of the upper end of the syringe 6, and the shape of the fixing groove 14 is rectangular. The fixing end 712 of the flat ejector pin 71 is inserted into the fixing groove 14, and two third screws 15 are threadedly connected to the side surface of the syringe 6 near the upper end, and one end of the third screw 15 passes through the flat ejector pin 71 and is threadedly connected to the inside of the syringe 6; because the flat ejector pin 71 is thin and long, it is easy to deform after a period of use and needs to be replaced. The split design of the syringe 6 and the flat ejector pin 71 only requires the flat ejector pin 71 to be replaced, and the syringe 6 is retained for continued use, thereby reducing the manufacturing cost of the mold; the present invention removes the two third screws 15, removes the deformed flat ejector pin 71 from the fixing groove 14, and then inserts the new flat ejector pin 71 into the fixing groove 14, and then installs the two third screws 15, thereby realizing the replacement of the flat ejector pin 71, and the operation is simple and convenient;

[0033] A gap is set around the flat ejector pin 71 and the inner wall of the fixing groove 14. When the flat ejector pin 71 is located in the ejector hole of the mold, the flat ejector pin 71 can be positioned through the ejector hole. The gap design between the flat ejector pin 71 and the fixing groove 14 can reduce the assembly stress and improve the flexibility of the flat ejector pin 71 during assembly. On the other hand, it reduces the machining accuracy of the fixing groove 14 and the assembly progress between the flat ejector pin 71, which makes it easier to install the flat ejector pin 71. During the working process, the gap design can also reduce the transmission of vibration between each other, thereby reducing the adverse effects of vibration on the structure and accuracy of the ejector pin.

[0034] In addition, when ejecting the injection molded part 8, the flat ejector pin 71 transmits the force to the syringe 6 through the third screw 15. The third screw 15 is made of spring steel. The third screw 15 can reduce the impact force of the flat ejector pin 71 to increase the service life of the syringe 6; and the gap setting between the flat ejector pin 71 and the fixing groove 14 can extend the distance between the force points of the third screw 15, thereby facilitating the elastic deformation of the third screw 15.

[0035] As an embodiment of the present invention, the through hole for the third screw 15 to pass through on the flat ejector pin 71 is a light hole 20, and the middle part of the third screw 15 is provided with an optical axis section that matches the light hole 20, and the two ends of the optical axis section are fine-pitch threads, which are screwed with the threaded holes on the syringe 6; the optical axis section can fit the light hole 20 to position the movement direction of the flat ejector pin 71 to ensure the elongation and retraction accuracy of the flat ejector pin 71, and the flat ejector pin 71 can slide on the optical axis section to achieve automatic fine adjustment of the position of the flat ejector pin 71 to cope with the position deviation caused by wear and vibration of parts during work. At the same time, the optical axis section is used in the middle part of the third screw 15 instead of the fine-pitch thread for the entire section, in order to avoid the fine-pitch thread from being worn or deformed seriously, resulting in the radial dimension of the third screw 15 becoming smaller and affecting the elongation and retraction accuracy of the flat ejector pin 71.

[0036] As an embodiment of the present invention, the side surface of the flat ejector pin 71 is also provided with two light holes 20 near the upper end, and a rectangular connecting block 18 is fixedly connected to one side of the bottom surface of the flat ejector pin 71, and a second threaded hole 19 is provided at the center of the side surface of the connecting block 18. The bottom surface of the flat ejector pin 71 is provided with a second slot 17 of the same shape as the connecting block 18 on the side of the connecting block 18, so that the connecting block 18 of another flat ejector pin 71 can be inserted therein, so as to limit the positions of the two flat ejector pins 71. A first threaded hole 16 is provided on the side surface of the flat ejector pin 71 near the lower end, and the first threaded hole 16 is connected to the second slot 17, and a screw is screwed in the first threaded hole 16, and the screw is screwed to the second threaded hole 19 on the other flat ejector pin 71, so as to fix the two flat ejector pins 71. The length of the flat ejector pin 71 can be extended by the above method.

[0037] Sometimes when the flat ejector pin 71 is used to eject the injection molded part 8, it is often necessary to replace a longer flat ejector pin 71 because the flat ejector pin 71 is not long enough. In order to improve the practicality of the flat ejector pin 71 of the present invention, the present invention can obtain the required flat ejector pin 71 by unscrewing the third screw 15 and then inserting the longer flat ejector pin 71 into the fixing groove 14. At the same time, after unscrewing the third screw 15, if there is no spare longer flat ejector pin 71, a longer flat ejector pin 71 can be obtained by connecting two short flat ejector pins 71. By connecting the connecting screws on the two flat ejector pins 71 When the block 18 is inserted into the second card slot 17 of the other party, a screw is then screwed into the first threaded hole 16, and one end of the screw will enter the second threaded hole 19. After the screw is tightened, the two flat ejector pins 71 are tightly fixed to form a longer flat ejector pin 71, and then one end of the longer flat ejector pin 71 is inserted into the fixing groove 14, and then the third screw 15 is tightened, and one end of the third screw 15 will pass through the light hole 20 on the flat ejector pin 71 and fix the longer flat ejector pin 71, thereby solving the problem of needing to use a longer flat ejector pin 71.

[0038] As an embodiment of the present invention, a cavity 21 is provided at the center position of the outer surface of the lower end of the syringe 6, a round rod 22 is arranged inside the cavity 21, the outer surface of the lower end of the round rod 22 is fixedly connected to the bracket 5, and two fourth screws 23 are threadedly connected to the side surface of the syringe 6 near the lower end; scale lines 26 are provided on one side of the outer cylindrical surface of the round rod 22; a plane 25 is provided on the other side of the outer cylindrical surface of the round rod 22 to facilitate the locking and fixing of the round rod 22 by the fourth screws 23.

[0039] When it is necessary to increase the ejection distance between the cylindrical ejector and the flat ejector 71, the present invention can loosen the fourth screw 23, then pull the round rod 22 out from the syringe 6, and tighten the fourth screw 23 when it is adjusted to the required position, so that the fourth screw 23 is pressed against the round rod 22, which plays a role of fixing after adjustment. The ejection distance of the ejector is adjusted by adjusting the round rod 22 and the syringe 6, which increases the practicality of the present invention. When adjusting the distance between the syringe 6 and the round rod 22, in order to accurately know the distance between the two, the present invention sets a scale line 26 on the round rod 22. When adjusting the distance between the syringe 6 and the round rod 22, the adjusted distance between the two can be known by aligning the cross section of the lower end of the syringe 6 with the scale value on the scale line 26, thereby achieving precise adjustment. The syringe 6 and the round rod 22 need to be fixed after each adjustment is completed. In order to further improve the fixing effect, the plane 25 opened in the present invention allows the fourth screw 23 to be lower than the plane 25 when it is pressed against the round rod 22, thereby increasing the contact area between the fourth screw 23 and the syringe 6, thereby increasing the friction force and further improving the fixing effect.

[0040] As an embodiment of the present invention, a first slot 12 is provided on a side of the second compensation rod 73 opposite to the first compensation rod 72 near the upper end, a fixing block 13 is provided in the first slot 12, and one end of the fixing block 13 is fixedly connected to the first compensation rod 72.

[0041] When removing the first compensation rod 72 and the second compensation rod 73, because the first compensation rod 72, the second compensation rod 73, the first screw 74, and the second screw 75 have many parts, in order to avoid losing one of the parts and causing the entire part to be unusable in the later stage, the first compensation rod 72 and the second compensation rod 73 are generally fixed together by the first screw 74 and the second screw 75 to form a whole, so as to avoid the problem that a small part is easily lost. In the present invention, the fixing block 13 is inserted into the first slot 12, so that the threaded holes on the fixing block 13 are easier to align, and then the first screw 74 and the second screw 75 are fixed to facilitate the first screw 74 and the second screw 75 to be screwed into the threaded holes.

[0042] As an embodiment of the present invention, a gap is set around and at the bottom of the first slot 12 and the fixing block 13, and the first compensation rod 72 and the second compensation rod 73 have the same first rigidity, and the fixing block 13 has a second rigidity, which is smaller than the first rigidity, so that the fixing block 13 is easy for the first compensation rod 72 and the second compensation rod 73 to deform; the first screw 74 includes a conical head 741 and a threaded rod 742 located at the front end of the conical head 741, and the second compensation rod 73 is provided with a conical hole 731 matching the shape of the conical head 741, and the fixing block 13 is provided with a threaded hole screwed with the threaded rod 742. When the first screw 74 is tightened, the first compensation rod 72 and the second compensation rod 73 will be relatively close and close to each other, and a pre-tightening force will be formed when the fixing block 13 is slightly deformed, so as to prevent the tightness of the first compensation rod 72 and the second compensation rod 73 from being reduced after long-term use. The fixing block 13 is glued to the end surface of the first compensation rod 72 by glue. This method can reduce the processing difficulty of the first compensation rod 72 and obtain a fixing block 13 with lower rigidity.

[0043] As an embodiment of the present invention, a partition groove 732 passing through the axis of the tapered hole 731 is provided on the arc outer surface of the second compensation rod 73, and the partition groove 732 extends to the first card slot 12. The setting of the partition groove 732 can make the first card slot 12 connected with the outside, so as to facilitate the heat dissipation of the first card slot 12, so as to reduce the influence of thermal expansion and contraction on the connection tightness of the first compensation rod 72 and the second compensation rod 73; and the partition groove 732 can also partially isolate the heat to reduce the heat transfer; on the other hand, after the ejection part of the second compensation rod 73 located at the upper part of the partition groove 732 contacts the injection molded part 8, the ejection part will be subjected to the reverse force of the injection molded part 8 to a certain extent in the direction of the first screw 74 and squeeze the first screw 74, and under the action of the tapered head 741 and the tapered hole 731, the first screw 74 can further tighten the fixing block 13, thereby improving the connection tightness of the first compensation rod 72 and the second compensation rod 73.

[0044] In order to facilitate the understanding of the present invention, the working principle of the present invention is briefly described below: when the present invention produces the injection molded part 8, the injection plastic is injected into the injection port 11 to form the injection molded part 8 between the fixed mold 9 and the movable mold 10, and then the movable mold 10 is separated. At this time, the ejection cylinder 2 pushes the support plate 4 to move upward, driving the bracket 5 and the syringe 6 to move upward, and at the same time drives the ejector pin 7 to move upward and eject the injection molded part 8, so as to facilitate the demolding of the injection molded part 8.

[0045] When the flat ejector pin 71 is needed, the operator can unscrew the first screw 74 and the second screw 75, and then remove the first compensation rod 72 and the second compensation rod 73 respectively, so as to obtain the flat ejector pin 71, which can drive the flat ejector pin 71 to eject the injection molded part 8 when the syringe 6 moves upward.

[0046] When a cylindrical ejector pin is needed, the nail receiving grooves 76 on the first compensation rod 72 and the second compensation rod 73 are clamped on the flat ejector pin 71, and then the first screw 74 and the second screw 75 are tightened at the upper and lower ends of the second compensation rod 73 respectively to fix the first compensation rod 72 and the second compensation rod 73 to form a cylindrical ejector pin, thereby improving the use range of the ejector pin and making the operation simple and convenient.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold ejector pin, characterized in that: The needle cylinder (6) comprises a flat ejector pin (71), a first compensation rod (72), a second compensation rod (73), a first screw (74) and a second screw (75); the flat ejector pin (71) is fixedly connected to the center of the outer surface of the upper end of the needle cylinder (6); one end of the flat ejector pin (71) is an ejection end (711) and the other end is a fixed end (712); a plurality of V-shaped grooves (713) arranged in parallel are provided on four sides of the flat ejector pin (71); one end of the V-shaped groove (713) extends to the ejection end (711) and the other end of the V-shaped groove (713) passes through the fixed end (712); A first compensation rod (72) is provided on one side of the flat ejector pin (71), and a second compensation rod (73) is provided on the other side of the flat ejector pin (71); a rectangular nail receiving groove (76) for accommodating the flat ejector pin (71) is provided on the opposite side of the first compensation rod (72) and the second compensation rod (73); a first screw (74) is installed on the arc-shaped outer side of the second compensation rod (73); the first screw (74) passes through the second compensation rod (73) and is threadedly connected to the first compensation rod (72); a second screw (75) is installed on the arc-shaped outer side of the end of the second compensation rod (73) close to the syringe (6); the second screw (75) passes through the flat ejector pin (71) and is threadedly connected to the first compensation rod (72).

2. A mold ejector according to claim 1, characterized in that: A fixing groove (14) is provided at the center of the outer surface of the upper end of the syringe (6), and the fixing end (712) of the flat ejector pin (71) is inserted into the fixing groove (14). Two third screws (15) are threadedly connected to the side surface of the syringe (6) near the upper end, and one end of the third screw (15) passes through the flat ejector pin (71) and is threadedly connected to the inside of the syringe (6); a gap is set around the flat ejector pin (71) and the inner wall of the fixing groove (14).

3. A mold ejector pin according to claim 2, characterized in that: The through hole provided on the flat ejector pin (71) for the third screw (15) to pass through is a light hole (20), and the middle part of the third screw (15) is provided with an optical axis section that matches the light hole (20), and both ends of the optical axis section are fine-pitch threads, which are screwed to the threaded hole on the syringe (6).

4. A mold ejector pin according to claim 3, characterized in that: The side surface of the flat ejector pin (71) is also provided with two light holes (20) near the upper end; a rectangular connecting block (18) is fixedly connected to one side of the bottom surface of the flat ejector pin (71); a second threaded hole (19) is provided at the center of the side surface of the connecting block (18); a second slot (17) having the same shape as the connecting block (18) is provided on the bottom surface of the flat ejector pin (71) at the side edge of the connecting block (18); a first threaded hole (16) is provided on the side surface of the flat ejector pin (71) near the lower end, and the first threaded hole (16) is connected to the second slot (17); a screw is threaded in the first threaded hole (16).

5. A mold ejector pin according to claim 4, characterized in that: A cavity (21) is provided at the center of the outer surface of the lower end of the syringe (6); a round rod (22) is provided inside the cavity (21); the outer surface of the lower end of the round rod (22) is fixedly connected to the bracket (5); two fourth screws (23) are threadedly connected to the side surface of the syringe (6) near the lower end; a scale line (26) is provided on one side of the outer circumferential surface of the round rod (22); and a plane (25) is provided on the other side of the outer circumferential surface of the round rod (22).

6. A mold ejector pin according to claim 4, characterized in that: A first clamping groove (12) is provided on a surface of the second compensation rod (73) opposite to the first compensation rod (72) near the upper end, a fixing block (13) is provided in the first clamping groove (12), and one end of the fixing block (13) is fixedly connected to the first compensation rod (72).

7. A mold ejector pin according to claim 6, characterized in that: The first slot (12) is provided with a gap around its periphery and bottom with the fixing block (13), and the first compensation rod (72) and the second compensation rod (73) have the same first rigidity, and the fixing block (13) has a second rigidity, which is smaller than the first rigidity; the first screw (74) comprises a conical head (741) and a threaded rod (742) located at the front end of the conical head (741); the second compensation rod (73) is provided with a conical hole (731) matching the shape of the conical head (741); the fixing block (13) is provided with a threaded hole screwed with the threaded rod (742); and the fixing block (13) is adhered to the end face of the first compensation rod (72) by glue.

8. A mold ejector pin according to claim 7, characterized in that: The arc outer surface of the second compensation rod (73) is provided with a partition groove (732) passing through the axis of the tapered hole (731), and the partition groove (732) extends to the first clamping groove (12).

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