Improved discharging rod structure

Abstract

The invention discloses an improved discharging rod structure, and relates to the technical field of mold processing, the improved discharging rod structure comprises a pushing rod upper fixing plate used for ensuring the accurate position of a discharging rod in a mold, so that a plastic part can be correctly pushed out in the injection molding process; the unloading rod is mounted below the fixed plate on the pushing rod, and is used for pushing the molded plastic part out of the mold cavity to ensure that the plastic part is demolded completely and losslessly; the clamping block is located at one end of the top of the discharging rod, and the clamping block and the discharging rod are of an integrated structure; according to the improved discharging rod, a bayonet connection mode is adopted, the clamping block and one end of the top of the discharging rod are clamped into the first clamping groove and the second clamping groove respectively so that the discharging rod can be rapidly fixed, due to the design, after production is finished, the discharging rod can be disassembled and replaced more conveniently and rapidly, due to bayonet connection, the problem that a screw hole is blocked is solved, and the production efficiency is improved. And the production interruption caused by cleaning the screw hole or replacing the screw is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, in particular to an improved unloading rod structure. Background Art

[0002] In the injection molding process, the ejector pin (also called ejector pin or ejector pin) is a key component in the mold used to push the molded plastic part out of the mold cavity. The traditional ejector pin structure is usually fixed to the mold by screw connection. This design has some significant problems and shortcomings in the long-term production process. Problems with screw connections: In the original structure, the discharge rod is connected to the fixing plate by screws. This connection method is prone to the accumulation of graphite and other impurities during the repeated use of the mold due to the high temperature inside the mold and the wear of the material. These impurities may gradually clog the screw holes, making the fixation of the discharge rod unstable, which in turn affects the replacement and maintenance of the discharge rod. When the screw holes are clogged, the removal and replacement process of the discharge rod becomes extremely cumbersome, requiring additional time and labor to clear the blockage, which not only reduces production efficiency, but may also cause interruptions in the production process, thereby wasting valuable production time. Risk of the unloading rod falling off: In the screw connection method, in order to ensure the stability of the unloading rod during the production process, the unloading rod and the fixing plate need to be tightly tightened by screws; however, vibration and thermal expansion during long-term production may cause the screws to loosen, thereby increasing the risk of the unloading rod falling off; the falling of the unloading rod will not only damage the plastic parts, but also may cause damage to the mold, and may even cause safety accidents; The problem of concentrated unloading force: When the screws are tightened, all the force during unloading is concentrated on the screw connection; if the burrs and flash on the mouth of the plastic part are uneven, this concentrated force may cause excessive stress on the connection of the unloading rod, thereby increasing the risk of the unloading rod breaking; once the unloading rod breaks, the unloading action cannot be completed, which will cause production to be suspended and require complex disassembly and maintenance work, further increasing production costs and time.

[0003] To this end, this scheme proposes an improved unloading rod structure, which adopts a bayonet connection method to replace the traditional screw connection, so as to solve the problems existing in the traditional screw connection method in the injection molding process and improve the production efficiency and the durability of the mold. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an improved unloading rod structure, which solves the problem that the screw connection method of the unloading rod in the traditional injection mold proposed in the background technology is easily affected by impurities and affects the stability, and there is a risk of the unloading rod falling and breaking, resulting in reduced production efficiency, increased costs and safety hazards.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an improved unloading rod structure, comprising: The upper fixing plate of the push rod is used to ensure the accurate position of the ejector rod in the mold so that the plastic parts can be correctly ejected during the injection molding process; The discharge rod is installed below the fixed plate on the push rod. The discharge rod is used to push the molded plastic part out of the mold cavity to ensure that the plastic part is demolded intact. A clamping block is located at one end of the top of the discharge rod, and the clamping block and the discharge rod are an integrated structure; The first clamping groove is provided on the outer side of the fixing plate on the push rod and is used for quickly fixing the clamping block at the top of the unloading rod; The second card slot is located below the first card slot and is connected to the inside of the first card slot. The second card slot is used to fix the rod body at one end of the top of the unloading rod.

[0006] Preferably, the outer wall of the unloading rod has a smooth surface, and the outer wall of the top end of the unloading rod fits with the inner wall of the second slot. The smooth surface design of the outer wall of the unloading rod reduces the friction with the inner wall of the slot, reduces wear, and improves the durability of the unloading rod. At the same time, the fitting design of the outer wall of the top end and the inner wall of the second slot ensures the stability and accuracy of the unloading rod during operation.

[0007] Preferably, the card block has a cylindrical geometric structure, and the outer wall of one side of the card block fits tightly against the inner wall surface of the first card slot, and a floating gap is reserved between the top surface of the card block and the top surface of the inner wall of the first card slot. The cylindrical geometric structure of the card block and the tight fit with the inner wall of the first card slot provide a stable fixation, while the floating gap between the top surface of the card block and the top surface of the inner wall of the card slot allows a certain amount of thermal expansion and slight displacement, which helps to reduce damage caused by thermal stress or mechanical stress and improves the reliability of the structure.

[0008] Preferably, there are four first card slots, corresponding to the four card blocks on the top of the pushing rod respectively. The internal cross-section of the first card slot is a U-shaped structure, and the inner wall of the arc-shaped part inside the first card slot matches the curvature of the outer wall of the card block. The width of the inner wall of the first card slot is equal to the outer diameter of the card block. The U-shaped structure of the first card slot and the matching design with the curvature of the outer wall of the card block ensure the stable fixation of the card block. At the same time, the setting of the four card slots corresponds to the four card blocks. This symmetrical design helps to evenly distribute the unloading force, reduce the burden on a single unloading rod, and improve the stability of the entire unloading system.

[0009] Preferably, the cross-section of the inner wall of the second slot is U-shaped, the arc surface of the inner wall of the second slot matches the arc of the outer wall surface of the unloading rod, the second slot is opened on the outer wall surface of the fixed plate on the pushing rod, and the bottom of the second slot is open, the width of the inner wall of the second slot is equal to the outer diameter of the unloading rod, and the open structure of the second slot facilitates the second slot to be easily engaged and fixed with the unloading rod.

[0010] Preferably, there are four unloading rods distributed vertically, and a wear-resistant layer is provided on the outer wall surface of the unloading rod. The material of the unloading rod is high-performance tool steel. The four vertically distributed designs of the unloading rod help to evenly distribute the ejection force and reduce the uneven stress when the plastic parts are ejected, thereby improving the quality of the plastic parts. The provision of the wear-resistant layer further improves the durability of the unloading rod and reduces the maintenance requirements. The material selection of high-performance tool steel ensures that the unloading rod has sufficient strength and toughness to adapt to the high-intensity ejection operation during the injection molding process.

[0011] Preferably, the unloading rod is composed of three sections of rod body, and grooves are provided at the top of the rod body near the two ends of the bottom, and the inner wall of the groove is threaded, and protruding threads are provided at the bottom of the two sections of the rod body near the top of the unloading rod, and the three sections of the rod body are connected to each other by threads. When the unloading rod body breaks after long-term use, or needs to be replaced due to wear, only one end needs to be disassembled by threading to remove it, so that the unloading rod body can be partially replaced, thereby greatly reducing the replacement cost of the unloading rod.

[0012] Preferably, a reinforcing rib is welded inside one end of the bottom of the unloading rod, and the reinforcing rib runs through the entire rod body of the unloading rod, so that the unloading rod can withstand greater ejection force, reduce bending or deformation, extend the service life, disperse and resist the stress generated during the injection molding process, reduce the risk of breakage, and ensure the stability of the ejection process.

[0013] Preferably, a circular groove is provided on the top surface of the card block, and a rubber gasket is embedded in the groove; a ring-shaped groove is provided on the bottom of the card block, and a rubber gasket is embedded in the ring-shaped groove; the rubber gasket and gasket provide a buffer between the card block and the fixed plate on the push rod, absorbing the impact force and vibration during the injection molding process, thereby protecting the precision parts of the mold and extending the service life of the mold; the addition of the rubber gasket and the rubber gasket reduces the direct contact between metal parts, reduces wear, and improves the durability of the card block and the fixed plate on the push rod.

[0014] The present invention provides an improved unloading rod structure, which has the following beneficial effects: (1) An improved unloading rod structure, the improved unloading rod adopts a bayonet connection method, and can be quickly fixed by respectively inserting the clamping block and one end of the top of the unloading rod into the first clamping groove and the second clamping groove. This design makes the disassembly and replacement of the unloading rod more convenient and quick after the production is completed. Since the bayonet connection avoids the problem of clogging of the screw holes, the production interruption caused by cleaning the screw holes or replacing the screws is reduced, thereby significantly improving the production efficiency. In addition, the rapid replacement process also meets the requirements of rapid mold change, providing a guarantee for the continuity and stability of the production process.

[0015] (2) Enhanced mold durability and production capacity: The block structure at the top of the discharge rod of this solution effectively solves the problem of discharge rod breakage caused by uneven flash of the product orifice through the clearance fit at the connection point of the first slot. This design not only reduces the risk of damage to the discharge rod, but also extends the service life of the mold. At the same time, since the stability of the discharge rod is enhanced, the failure rate in the production process is reduced and the production capacity is improved.

[0016] (3) The rod body of the discharge rod adopts a three-section structure. When the rod body of the discharge rod breaks after long-term use, or needs to be replaced due to wear, only one end needs to be disassembled through a thread to remove it, so that the rod body of the discharge rod can be partially replaced, thereby greatly reducing the replacement cost of the discharge rod.

[0017] This solves the problem that the screw connection method of the unloading rod in the traditional injection mold is easily affected by impurities and affects stability, and there is a risk of the unloading rod falling and breaking, which leads to reduced production efficiency, increased costs and safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first card slot and the second card slot of the present invention; Figure 3 It is a schematic diagram of the top view structure of the present invention; Figure 4 To improve the schematic diagram of the front discharge rod structure; Figure 5 It is a schematic diagram of the internal structure of the present invention; Figure 6 It is a schematic diagram of the structure of the rubber gasket of the present invention.

[0019] In the figure, 1. fixed plate on the push rod; 2. unloading rod; 3. clamping block; 4. first clamping slot; 5. second clamping slot; 6. reinforcing rib; 7. rubber gasket; 8. rubber gasket. DETAILED DESCRIPTION

[0020] 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. Example 1

[0021] See also Figure 1-3, the embodiment of the present invention provides a technical solution: an improved unloading rod structure, comprising: a push rod upper fixing plate 1, the push rod upper fixing plate 1 is used to ensure that the position of the unloading rod 2 in the mold is accurate, so that the plastic part can be correctly pushed out during the injection molding process; the unloading rod 2, which is installed below the push rod upper fixing plate 1, the unloading rod 2 is used to push the formed plastic part out of the mold cavity to ensure that the plastic part is demolded intactly; a clamping block 3, which is located at one end of the top of the unloading rod 2, and the clamping block 3 and the unloading rod 2 are an integral structure; a first clamping groove 4, which is opened on the outside of the push rod upper fixing plate 1, and is used to quickly fix the clamping block 3 at the top of the unloading rod 2; a second clamping groove 5, which is located below the first clamping groove 4, and the second clamping groove 5 is connected to the inside of the first clamping groove 4, and the second clamping groove 5 is used to fix the rod body at one end of the top of the unloading rod 2; the outer wall of the unloading rod 2 has a smooth surface, and the outer wall of the top end of the unloading rod 2 The wall fits with the inner wall of the second slot 5; the block 3 is a cylindrical geometric structure, and the outer wall of one side of the block 3 fits tightly with the inner wall surface of the first slot 4, and a floating gap is reserved between the top surface of the block 3 and the top surface of the inner wall of the first slot 4. The improved unloading rod 2 structure effectively solves the problem of screw hole clogging caused by impurity accumulation in traditional screw connections through a bayonet connection, simplifies the disassembly and replacement process of the unloading rod 2, and reduces maintenance time and cost. At the same time, the integrated structure of the block 3 and the unloading rod 2 and the tightly fitting design of the first slot 4 reduce the risk of the unloading rod 2 falling and enhance the safety during the production process. In addition, the design of the floating gap and the fitting of the outer wall of the unloading rod 2 with the inner wall of the second slot 5 reduce the concentration of unloading force and reduce the risk of breakage of the unloading rod 2, thereby reducing production interruptions and maintenance work, and improving production efficiency and mold durability. Example 2

[0022] The embodiment of the present invention provides a technical solution: an improved unloading rod structure, wherein four first slots 4 are provided, corresponding to the blocks 3 at the top of the four push rods respectively, the inner cross-section of the first slot 4 is a U-shaped structure, and the inner wall of the arc-shaped part of the first slot 4 matches the curvature of the outer wall of the block 3, and the inner wall width of the first slot 4 is equal to the outer diameter of the block 3; the inner wall cross-section of the second slot 5 is a U-shaped structure, the arc surface of the inner wall of the second slot 5 matches the curvature of the outer wall surface of the unloading rod 2, the second slot 5 is opened on the outer wall surface of the fixed plate 1 on the push rod, and the bottom of the second slot 5 is open, and the inner wall width of the second slot 5 is equal to the outer diameter of the unloading rod 2; there are four unloading rods 2 distributed vertically, and the outer wall surface of the unloading rod 2 is provided with a wear-resistant layer, and the material of the unloading rod 2 is high-performance tool steel. The rod 2 structure ensures the stable fixation of the unloading rod 2 and the uniform distribution of the pushing force by setting four first slots 4 corresponding to the blocks 3 on the top of the four push rods respectively. The U-shaped structure of the first slot 4 matches the curvature of the outer wall of the block 3, and the size design that the inner wall width is equal to the outer diameter of the block 3 improves the accuracy and stability of the connection, and effectively avoids the problem of the unloading rod 2 falling due to unstable connection. At the same time, the U-shaped structure of the second slot 5 and the matching of the curvature of the outer wall surface of the unloading rod 2, as well as the open bottom design, enhance the fixation of the unloading rod 2, facilitate installation and disassembly, and improve production efficiency. The setting of the wear-resistant layer and the selection of high-performance tool steel material significantly improve the wear resistance and service life of the unloading rod 2, and reduce the maintenance and replacement requirements caused by wear. Example 3

[0023] See also Figure 5-6The embodiment of the present invention provides a technical solution: an improved unloading rod structure, the unloading rod 2 is composed of three sections of rod body, and grooves are arranged at the top of the rod body near the two ends of the bottom, and the inner wall of the groove is threaded, the bottom of the two sections of the rod body near the top of the unloading rod 2 is provided with convex threads, and the three sections of the rod body are connected to each other by threads, and a reinforcing rib 6 is welded inside one end of the bottom of the unloading rod 2, and the reinforcing rib 6 runs through the entire rod body of the unloading rod 2, a circular groove is opened on the top surface of the clamping block 3, and a rubber gasket 7 is embedded in the groove, an annular groove is opened at the bottom of the clamping block 3, and a rubber gasket 8 is embedded in the annular groove, the rubber gasket and gasket provide a buffer between the clamping block 3 and the upper fixing plate 1 of the push rod, absorb the impact force and vibration during the injection molding process, thereby protecting The precision parts of the mold extend the service life of the mold. The addition of rubber gaskets 7 and rubber washers 8 reduces direct contact between metal parts, reduces wear, and improves the durability of the block 3 and the fixing plate 1 on the push rod. The unloading rod 2 adopts an innovative three-section structural design. This design allows the unloading rod 2 to be partially replaced by disassembling one end of the rod body through threads when it is broken or worn after long-term use. This modular design reduces maintenance costs and time, while improving the economic benefits and sustainability of the unloading rod 2. By replacing a part of the rod body instead of the entire rod body, material waste is reduced, and the labor intensity and potential production delays are also reduced due to the simplification of the replacement process.

[0024] Working principle: The improved unloading rod 2 adopts a bayonet connection method. The block 3 and one end of the top of the unloading rod 2 are respectively inserted into the first slot 4 and the second slot 5 to be quickly fixed. This design makes it easier and quicker to disassemble and replace the unloading rod 2 after production. The bayonet connection avoids the problem of clogging of the screw holes and reduces production interruptions caused by cleaning the screw holes or replacing screws, thereby significantly improving production efficiency. In addition, the rapid replacement process also meets the requirements of rapid mold change, providing a guarantee for the continuity and stability of the production process. The block 3 structure at the top of the unloading rod 2 is matched through the clearance at the connection of the first slot 4, which effectively solves the problem of breakage of the unloading rod 2 caused by uneven flash of the product orifice. The design not only reduces the risk of damage to the discharge rod 2, but also extends the service life of the mold. At the same time, due to the enhanced stability of the discharge rod 2, the failure rate in the production process is reduced, and the production capacity is improved. The discharge rod 2 adopts an innovative three-section structure design, which allows the discharge rod 2 to be partially replaced by disassembling one end of the discharge rod 2 through a thread after a long period of use. This three-section structure design significantly reduces the overall replacement cost of the discharge rod 2, because it avoids the discarding of the entire discharge rod 2, but allows the user to replace only the damaged part. This design is not only economical and efficient, but also reduces material waste, while also simplifying the maintenance and replacement process and improving production efficiency.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An improved unloading rod structure, characterized in that: include: A push rod upper fixing plate (1), the push rod upper fixing plate (1) is used to ensure that the ejector rod (2) is accurately positioned in the mold so that the plastic part can be correctly ejected during the injection molding process; A discharge rod (2) is installed below the fixed plate (1) on the push rod, and the discharge rod (2) is used to push the molded plastic part out of the mold cavity to ensure that the plastic part is demoulded intact; A clamping block (3) located at one end of the top of the discharge rod (2), wherein the clamping block (3) and the discharge rod (2) are an integral structure; A first clamping groove (4) is formed on the outer side of the fixing plate (1) on the push rod and is used to quickly fix the clamping block (3) at the top end of the discharge rod (2); The second card slot (5) is located below the first card slot (4), and the second card slot (5) is connected to the inside of the first card slot (4). The second card slot (5) is used to fix the rod body at one end of the top of the discharge rod (2).

2. The improved unloading rod structure according to claim 1, characterized in that: The outer wall of the discharge rod (2) has a smooth surface, and the outer wall of one end of the top of the discharge rod (2) fits with the inner wall of the second clamping groove (5).

3. The improved unloading rod structure according to claim 1, characterized in that: The clamping block (3) has a cylindrical geometric structure, and an outer wall on one side of the clamping block (3) is tightly fitted with an inner wall surface of the first clamping slot (4), and a floating gap is reserved between the top surface of the clamping block (3) and the top surface of the inner wall of the first clamping slot (4).

4. The improved unloading rod structure according to claim 1 is characterized in that: Four first clamping grooves (4) are provided, corresponding to the clamping blocks (3) at the tops of the four push rods respectively; the internal cross-section of the first clamping groove (4) is a U-shaped structure; the inner wall of the arc-shaped portion of the first clamping groove (4) matches the arc of the outer wall of the clamping block (3); and the inner wall width of the first clamping groove (4) is equal to the outer diameter of the clamping block (3).

5. The improved unloading rod structure according to claim 1 is characterized in that: The inner wall cross-section of the second clamping groove (5) is in a U-shaped structure, the arc surface of the inner wall of the second clamping groove (5) matches the arc of the outer wall surface of the discharge rod (2), the second clamping groove (5) is opened on the outer wall surface of the fixed plate (1) on the push rod, and the bottom of the second clamping groove (5) is open, and the inner wall width of the second clamping groove (5) is equal to the outer diameter of the discharge rod (2).

6. The improved unloading rod structure according to claim 1, characterized in that: Four discharge rods (2) are vertically distributed, and a wear-resistant layer is provided on the outer wall surface of the discharge rod (2). The material of the discharge rod (2) is high-performance tool steel.

7. The improved unloading rod structure according to claim 1, characterized in that: The discharge rod (2) is composed of three sections of rod body, and grooves are arranged at the top of the rod body near the two ends of the bottom, and the inner wall of the groove is threaded. The bottom of the two sections of the discharge rod (2) near the top are provided with protruding threads, and the three sections of the rod body are connected to each other by threads.

8. The improved unloading rod structure according to claim 1, characterized in that: A reinforcing rib (6) is welded inside one end of the bottom of the discharge rod (2), and the reinforcing rib (6) runs through the entire body of the discharge rod (2).

9. The improved unloading rod structure according to claim 1, characterized in that: A circular groove is formed on the top surface of the clamping block (3), and a rubber gasket (7) is embedded in the groove; an annular groove is formed on the bottom surface of the clamping block (3), and a rubber gasket (8) is embedded in the annular groove.

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