Injection mold with plastic part ejection protection function

Abstract

The invention relates to the related technical field of injection molds, in particular to an injection mold with a plastic part ejection protection function. Comprising a base plate, a pushing motor is fixedly connected to the upper surface of the base plate, a first fixing plate is fixedly connected to the surface of one side of the pushing motor, a limiting column is fixedly connected to the surface of one side of the first fixing plate, and an ejection mechanism is arranged on the surface of one side of the limiting column; and an ejector pin mechanism is arranged on the surface of one side of the ejection mechanism. According to the injection mold with the plastic part ejection protection function, through the arrangement of the ejector pin mechanism, when a model is ejected out, a discharging push rod is started, due to the arrangement of an inclined push rod piece and a rubber contact head, the model is not prone to being damaged when taken down, and if the pressure is too large, due to the arrangement of a protection spring, the model can be prevented from being damaged; and the influence of the ejector pin on the quality and appearance of a plastic part is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field related to injection molds, and in particular to an injection mold with plastic part ejection protection. Background Art

[0002] Injection molds are a type of mold commonly used in the plastic processing industry and are widely used in various fields, such as automobile manufacturing, electronic equipment, medical equipment, daily necessities, etc. With the continuous growth in demand for plastic products and the increasing requirements for product quality, injection mold technology is also constantly developing and innovating. Plastic products are increasingly widely used in the market, and the requirements for their quality and precision are also getting higher and higher. In order to meet market demand, improve the production quality and efficiency of plastic products, and reduce production costs, it is crucial to solve the problems existing in the ejection process of traditional injection molds. Therefore, an injection mold with plastic ejection protection is particularly needed.

[0003] However, due to the limitations of the design, the existing ejector device of the injection mold has uneven ejection force, unreasonable ejection position or defects in the mold structure design during use, which leads to deformation, cracking, scratches and other problems on the plastic parts, seriously affecting the quality and appearance of the plastic parts. These problems are more prominent, especially for some plastic parts with complex structures and high precision requirements. In addition, the traditional ejector mechanism is prone to wear and jamming after long-term use, which reduces the service life and production efficiency of the mold. Summary of the invention

[0004] The purpose of the present invention is to provide an injection mold with plastic part ejection protection to solve the problem that the existing injection mold ejection device proposed in the above background technology has uneven ejection force, unreasonable ejection position or defects in the mold structure design during use due to design limitations, resulting in deformation, cracking, scratches and other problems of the plastic parts, seriously affecting the quality and appearance of the plastic parts, especially for some plastic parts with complex structures and high precision requirements. These problems are more prominent. In addition, the traditional ejection mechanism is prone to wear and jamming after long-term use, which reduces the service life and production efficiency of the mold.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection mold with plastic part ejection protection, comprising a base plate, a push motor is fixedly connected to the upper surface of the base plate, a first fixed plate is fixedly connected to one side surface of the push motor, a limiting column is fixedly connected to one side surface of the first fixed plate, an ejection mechanism is arranged on one side surface of the limiting column, an ejection mechanism is arranged on one side surface of the ejection mechanism, a sliding rail is slidably connected to one side surface of the ejection mechanism, a compression spring is attached to the outer side surface of the sliding rail, a shape cavity is fixedly connected to one side surface of the compression spring, a nozzle is fixedly connected to one side surface of the shape cavity, and a second fixed plate is fixedly connected to one side surface of the shape cavity;

[0006] The ejector mechanism includes a push column, a protection spring, a connecting block, a shell, a rotating shaft, a rubber contact head and an inclined push rod part. One side surface of the ejection mechanism is fixedly connected with the push column, one side surface of the push column is fixedly connected with the protection spring, one side surface of the protection spring is fixedly connected with the connecting block, the outer side surface of the connecting block is fixedly connected with the shell, one side surface of the shell is fixedly connected with the rotating shaft, one side surface of the rotating shaft is fixedly connected with the rubber contact head, and one side surface of the rubber contact head is fixedly connected with the inclined push rod part.

[0007] Preferably, the limit posts are arranged in four groups symmetrically about the perpendicular midline of the first fixed plate, and the push posts, protection springs, connecting blocks and other components are arranged in six groups on one side surface of the blanking push rod.

[0008] Preferably, one end of the housing is slidably connected to a push column, and the other end is a conical structure, and the rubber contact head is made of silicone rubber.

[0009] Preferably, the rubber contact head is arranged by the inclined push rod and the rotating shaft, and when one end of the rubber contact head is subjected to pressure, the rubber contact head will tilt toward one end of the inclined push rod, and the sliding rail is fixedly connected with four groups on one side surface of the cavity.

[0010] Preferably, the nozzle is arranged at the exact center of the cavity, and the second fixing plate and the first fixing plate are symmetrically arranged on the base plate.

[0011] Preferably, the ejection mechanism includes a fixed block, a material discharge push rod, a fixed disk, a shrink element cover and a cooling tube, one side surface of the limiting column is slidably connected to the fixed block, one side surface of the fixed block is fixedly connected to the material discharge push rod, one side surface of the material discharge push rod is fixedly connected to the fixed disk, one side surface of the fixed disk is fixedly connected to the shrink element cover, and the inner surface of the shrink element cover is fixedly connected to the cooling tube.

[0012] Preferably, a hole matching the size of the ejector pin is provided on the surface of the shrink element cover close to the cavity, and the cooling tube is arranged inside the shrink element cover and fits therewith, so that the shrink element cover can be cooled down in a very short time.

[0013] Preferably, the material of the shrink element cover is tungsten steel, and the liquid of the cooling pipe is polyether synthetic coolant.

[0014] Preferably, the fixed plate can push the ejector pin out of the shrink element cover by setting the material push rod, and the fixed block can push the material push rod and other components along the direction of the limit column by setting the push motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the injection mold with plastic part ejection protection, through the setting of the ejector mechanism, starts the blanking push rod when the model is ejected, and the blanking push rod pushes the push column to push the rubber contact head to the outside of the shrink element cover. When the rubber contact head contacts the model, due to the setting of the inclined push rod, the rubber contact head will tilt slightly inward, which is beneficial to protect the model from damage, and when the rubber contact head contacts the model, if the pressure is too large, the protection spring will be compressed and become smaller, which prevents the model from being damaged by excessive pressure, which is beneficial to protecting the plastic parts, preventing deformation, cracking, scratches and other problems, and reducing the impact on the quality and appearance of the plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the side appearance structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the ejection mechanism structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the cavity and nozzle structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the telescopic part of the ejector mechanism of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the ejector pin part of the ejector pin mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the ejector mechanism of the utility model.

[0022] In the figure: 1. base plate; 2. driving motor; 3. first fixed plate; 4. limiting column; 5. ejector mechanism; 501. fixing block; 502. unloading push rod; 503. fixing plate; 504. shrink element cover; 505. cooling tube; 6. ejector mechanism; 601. driving column; 602. protection spring; 603. connecting block; 604. housing; 605. rotating shaft; 606. rubber contact head; 607. tilting push rod member; 7. sliding rail; 8. compression spring; 9. cavity; 10. nozzle; 11. second fixed plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the new embodiment of the present invention to clearly and completely describe the technical solutions in the new embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-6 The present invention provides a technical solution: an injection mold with plastic part ejection protection, comprising a base plate 1, a push motor 2 is fixedly connected to the upper surface of the base plate 1, a first fixed plate 3 is fixedly connected to the side surface of the push motor 2, a limiting column 4 is fixedly connected to the side surface of the first fixed plate 3, an ejection mechanism 5 is arranged on the side surface of the limiting column 4, an ejection mechanism 6 is arranged on the side surface of the ejection mechanism 5, a sliding rail 7 is slidably connected to the side surface of the ejection mechanism 5, a compression spring 8 is attached to the outer surface of the sliding rail 7, a cavity 9 is fixedly connected to the side surface of the compression spring 8, a nozzle 10 is fixedly connected to the side surface of the cavity 9, and a second fixed plate 11 is fixedly connected to the side surface of the cavity 9;

[0025] The ejector mechanism 6 includes a push column 601, a protection spring 602, a connecting block 603, a housing 604, a rotating shaft 605, a rubber contact head 606 and an inclined push rod 607. The push column 601 is fixedly connected to one side surface of the ejector mechanism 5, the protection spring 602 is fixedly connected to one side surface of the push column 601, the connecting block 603 is fixedly connected to one side surface of the protection spring 602, the housing 604 is fixedly connected to one side surface of the connecting block 603, the housing 604 is fixedly connected to one side surface of the housing 604, the rotating shaft 605 is fixedly connected to one side surface of the rotating shaft 605, the rubber contact head 606 is fixedly connected to one side surface of the rubber contact head 606, and the inclined push rod 607 is fixedly connected to one side surface of the rubber contact head 606. 03. The setting of the shell 604, the rotating shaft 605, the rubber contact head 606 and the inclined push rod 607. When in use, the unloading push rod 502 is started, and the unloading push rod 502 pushes the push column 601 to push the rubber contact head 606 to the outside of the shrink element cover 504. When the rubber contact head 606 contacts the model, due to the setting of the inclined push rod 607, the rubber contact head 606 will tilt slightly inward, which is beneficial to protect the model from damage. When the rubber contact head 606 contacts the model, if the pressure is too high, the protection spring 602 will be compressed and become smaller, which prevents the model from being damaged by excessive pressure, which is beneficial to protect the plastic parts, prevent deformation, cracking, scratches and other problems, and reduce the impact on the quality and appearance of the plastic parts.

[0026] Furthermore, four groups of limit columns 4 are symmetrically arranged around the mid-vertical line of the first fixed plate 3, and six groups of components such as push columns 601, protection springs 602 and connecting blocks 603 are arranged on the surface of one side of the blanking push rod 502. Through the arrangement of the limit columns 4 and the push columns 601, when in use, the injection mold will be subjected to a greater impact force during the process of mold closing and mold opening. The limit columns 4 are symmetrically arranged around the mid-vertical line of the first fixed plate 3 in four groups, so that the mold can be evenly supported and positioned in all directions.

[0027] Furthermore, one end of the housing 604 is slidably connected to a push column 601, and the other end is a conical structure. The rubber contact head 606 is made of silicone rubber. Through the setting of the rubber contact head 606, when in use, the silicone rubber has excellent flexibility and elasticity. During the ejection process, when the rubber contact head 606 contacts the plastic part, the good elasticity can ensure that the contact head fits tightly with the surface of the plastic part. Even if there are slight unevenness on the surface of the plastic part, the rubber contact head 606 can adapt through its own elastic deformation, thereby providing uniform contact pressure.

[0028] Furthermore, the rubber contact head 606 is arranged with the inclined push rod 607 and the rotating shaft 605. When one end of the rubber contact head 606 is subjected to pressure, the rubber contact head 606 will tilt toward the end of the inclined push rod 607. The sliding rail 7 is fixedly connected with four groups on one side surface of the cavity 9. By the arrangement of the inclined push rod 607, when in use, the rubber contact head 606 can disperse the pressure more evenly. During ejection, if the contact head is a completely rigid fixed structure, when the surface of the plastic part is uneven or the ejection resistance is uneven, concentrated stress is easily generated at the contact point, resulting in indentations or deformation on the surface of the plastic part. This tiltable design allows the pressure to be transmitted in multiple directions, and the force is dispersed to a larger area by the inclined push rod 607, thereby reducing the negative impact of concentrated force on the plastic part.

[0029] Furthermore, the nozzle 10 is arranged at the exact center of the cavity 9, and the second fixed plate 11 and the first fixed plate 3 are symmetrically arranged on the base plate 1. Through the arrangement of the first fixed plate 3 and the second fixed plate 11, when in use, the second fixed plate 11 and the first fixed plate 3 are symmetrically arranged on the base plate 1, so that the force on the mold in the vertical direction is more balanced. During the injection molding process, the mold needs to withstand the effects of multiple forces such as the clamping force, the ejection force and the pressure of the plastic melt. The symmetrically arranged fixed plates can evenly distribute these forces to the base plate 1 to prevent the mold from being deformed due to excessive local force.

[0030] Furthermore, the ejection mechanism 5 includes a fixed block 501, a material discharge push rod 502, a fixed disk 503, a shrink element cover 504 and a cooling tube 505. The fixed block 501 is slidably connected to one side surface of the limiting column 4. The fixed block 501 is fixedly connected to one side surface of the material discharge push rod 502. The fixed disk 503 is fixedly connected to one side surface of the material discharge push rod 502. The fixed disk 503 is fixedly connected to one side surface of the shrink element cover 504. The inner side surface of the shrink element cover 504 is fixedly connected to the cooling tube 505. , the arrangement of the material unloading push rod 502, the fixed plate 503, the shrink element cover 504 and the cooling tube 505. When in use, the material unloading push rod 502 can be started to move the fixed plate 503, the shrink element cover 504 and the cooling tube 505 to the left, so that the cavity 9 and the model are separated. Then the cooling tube 505 quickly cools down the shrink element cover 504. Due to the principle of thermal expansion and contraction of the shrink element cover 504, the volume of the shrink element cover 504 is reduced when cooled. At this time, starting the ejector mechanism 6 can quickly and conveniently take out the model.

[0031] Furthermore, a hole matching the size of the ejector pin is provided on the surface of the shrink element cover 504 close to the cavity 9, and a cooling tube 505 is arranged inside the shrink element cover 504 and fits therewith, so that the shrink element cover 504 can be cooled down in a very short time. By setting the shrink element cover 504, when in use, the cooling tube 505 can cool the shrink element cover 504 in a very short time, which provides a precise means for controlling the temperature of the mold. In the process of removing the mold, different plastic materials and plastic part shapes have different requirements for the mold temperature. By quickly cooling the shrink element cover 504, the local temperature of the mold can be flexibly adjusted according to actual production needs, thereby facilitating the removal of the mold.

[0032] Furthermore, the material of the shrink element cover 504 is tungsten steel, and the liquid of the cooling tube 505 is a polyether synthetic coolant. Through the arrangement of the shrink element cover 504 and the cooling tube 505, when in use, tungsten steel is a hard alloy with extremely high hardness. During the frequent use of the injection mold, the shrink element cover 504 needs to be repeatedly acted on and rubbed against the plastic parts. The high hardness of tungsten steel can effectively resist these wears and reduce surface damage caused by long-term use, thereby extending the service life of the shrink element cover 504. Tungsten steel has good thermal conductivity and can effectively reduce the temperature. The polyether synthetic coolant can maintain stable physical and chemical properties within a wide temperature range. When the mold has just completed injection molding and the temperature of the shrink element cover 504 is high, the polyether coolant will not decompose or lose its cooling performance due to the high temperature and can still absorb heat efficiently.

[0033] Furthermore, the fixed plate 503 can push the ejector pin out of the shrink element cover 504 by means of the setting of the ejection push rod 502, and the fixed block 501 can push the ejection push rod 502 and other components along the direction of the limiting column 4 by means of the setting of the pushing motor 2. By means of the setting of the ejection push rod 502 and the fixed plate 503, when in use, the ejector pin is pushed by means of the cooperation between the fixed plate 503 and the ejection push rod 502, so that precise control of the ejector pin movement can be achieved. In some injection molding productions that require high dimensional accuracy of plastic parts, precise ejector pin control can prevent the plastic parts from being damaged or being damaged due to uneven force or inaccurate ejection position during the ejection process.

[0034] Working principle: When the model is ejected, the material discharge push rod 502 is started, and the material discharge push rod 502 pushes the push column 601 to push the rubber contact head 606 to the outside of the shrink element cover 504. When the rubber contact head 606 contacts the model, due to the setting of the inclined push rod member 607, the rubber contact head 606 will tilt slightly inward, which is beneficial to protect the model from damage. When the rubber contact head 606 contacts the model, if the pressure is too high, the protection spring 602 will be compressed and become smaller, which prevents the model from being damaged by excessive pressure, which is beneficial to protect the plastic parts, prevent deformation, cracking, scratches and other problems, and reduce the impact on the quality and appearance of the plastic parts.

[0035] 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. An injection mold with plastic part ejection protection, comprising a base plate (1), characterized in that: The upper surface of the base plate (1) is fixedly connected to a driving motor (2), a side surface of the driving motor (2) is fixedly connected to a first fixed plate (3), a side surface of the first fixed plate (3) is fixedly connected to a limiting column (4), a side surface of the limiting column (4) is provided with an ejection mechanism (5), a side surface of the ejection mechanism (5) is provided with an ejector mechanism (6), a side surface of the ejection mechanism (5) is slidably connected to a sliding rail (7), an outer surface of the sliding rail (7) is fitted with a compression spring (8), a side surface of the compression spring (8) is fixedly connected to a cavity (9), a side surface of the cavity (9) is fixedly connected to a nozzle (10), and a side surface of the cavity (9) is fixedly connected to a second fixed plate (11); The ejector mechanism (6) comprises a push column (601), a protection spring (602), a connection block (603), a housing (604), a rotating shaft (605), a rubber contact head (606) and an inclined push rod (607); one side surface of the ejector mechanism (5) is fixedly connected to the push column (601); one side surface of the push column (601) is fixedly connected to the protection spring (602); one side surface of the protection spring (602) is fixedly connected to the connection block (603); the outer side surface of the connection block (603) is fixedly connected to the housing (604); one side surface of the housing (604) is fixedly connected to the rotating shaft (605); one side surface of the rotating shaft (605) is fixedly connected to the rubber contact head (606); one side surface of the rubber contact head (606) is fixedly connected to the inclined push rod (607).

2. The injection mold with plastic part ejection protection according to claim 1, characterized in that: The limiting columns (4) are arranged in four groups symmetrically about the mid-vertical line of the first fixed plate (3), and the components such as the pushing columns (601), the protection springs (602) and the connecting blocks (603) are arranged in six groups on one side surface of the unloading push rod (502).

3. The injection mold with plastic part ejection protection according to claim 1, characterized in that: One end of the housing (604) is slidably connected to a push column (601), and the other end is a conical structure. The rubber contact head (606) is made of silicone rubber.

4. The injection mold with plastic part ejection protection according to claim 1, characterized in that: The rubber contact head (606) is arranged by the inclined push rod (607) and the rotating shaft (605). When one end of the rubber contact head (606) is subjected to pressure, the rubber contact head (606) will tilt toward one end of the inclined push rod (607). The sliding rail (7) is fixedly connected with four groups on one side surface of the cavity (9).

5. The injection mold with plastic part ejection protection according to claim 1, characterized in that: The spray head (10) is arranged at the exact center of the cavity (9), and the second fixing plate (11) and the first fixing plate (3) are symmetrically arranged on the base plate (1).

6. The injection mold with plastic part ejection protection according to claim 1, characterized in that: The ejection mechanism (5) comprises a fixed block (501), a material discharge push rod (502), a fixed disk (503), a shrink element cover (504) and a cooling pipe (505); one side surface of the limiting column (4) is slidably connected to the fixed block (501); one side surface of the fixed block (501) is fixedly connected to the material discharge push rod (502); one side surface of the material discharge push rod (502) is fixedly connected to the fixed disk (503); one side surface of the fixed disk (503) is fixedly connected to the shrink element cover (504); and the inner side surface of the shrink element cover (504) is fixedly connected to the cooling pipe (505).

7. The injection mold with plastic part ejection protection according to claim 6, characterized in that: The surface of the shrink element cover (504) close to the cavity (9) is provided with a hole matching the size of the ejector pin, and the cooling tube (505) is arranged inside the shrink element cover (504) and fits therewith, so that the shrink element cover (504) can be cooled down in a very short time.

8. The injection mold with plastic part ejection protection according to claim 6, characterized in that: The material of the shrink element cover (504) is tungsten steel, and the liquid of the cooling pipe (505) is polyether type synthetic coolant.

9. The injection mold with plastic part ejection protection according to claim 6, characterized in that: The fixed plate (503) can push the ejector pin out of the shrink element cover (504) by means of the setting of the material removal push rod (502), and the fixed block (501) can push the material removal push rod (502) and other components along the direction of the limit column (4) by means of the setting of the driving motor (2).

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