WO2023246053A1 - Injection molding apparatus and injection molding machine - Google Patents

Abstract

The present application discloses an injection molding apparatus and an injection molding machine. The injection molding apparatus comprises an injection base assembly, a plasticizing assembly and a lead screw assembly. The plasticizing assembly is connected to the lead screw assembly; the lead screw assembly passes through the injection base assembly; openings are formed on two sides of the injection base assembly in a first direction; and the lead screw assembly drives the plasticizing assembly to perform a plastic injection action on the injection base assembly. According to the technical solution provided by the present application, the mounting direction of a plasticizing base assembly can be changed, so that the injection base assembly is not prone to deformation when being stressed, and machining is facilitated. A plastic injection guide rail is mounted on the side wall of a bottom plate, and when the injection base assembly is stressed, a sliding block moves in a direction perpendicular to a plastic injection direction, so that the guide rail and the sliding block are not prone to damage. The mounting position of the plasticizing assembly is changed, thereby facilitating mounting and maintenance.

Description

Injection molding equipment and injection molding machines

This application requests the priority of the patent application submitted to the State Intellectual Property Office of China on June 22, 2022, with the application number 202210708371.X and the application name "Injection Molding Device and Injection Molding Machine".

Technical field

The present application relates to the technical field of injection molding machines, and in particular, to an injection molding device and an injection molding machine.

Background technique

The working principle of the injection molding machine is similar to that of a syringe for injection. It uses the thrust of the screw (or plunger) to inject the plasticized plastic in the molten state (i.e. viscous flow state) into the closed mold cavity. The process of obtaining finished products after curing and shaping. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melting and plasticizing - pressure injection - mold filling and cooling - mold opening and removal. After taking out the plastic part, the mold is closed again and the next cycle is carried out.

The traditional separate shooting platform structure usually divides the shooting platform seat into the front seat of the shooting platform and the rear seat of the shooting platform. The front and rear seats of the shooting platform are connected together through four tie rods. The injection action is guided by the copper sleeve between the plasticizing seat and the tie rod. The four tie rods need to bear the weight of the plasticizing seat of the moving parts, and are prone to deformation, which affects the injection accuracy. The box-type injection platform structure adopts an integrated injection platform structure, with guide rails installed on it. The injection molding guide is guided by the guide rails. The processing accuracy of the injection platform seat is easy to ensure, and it is widely used in the injection platform structure of all-electric injection molding machines. However, the traditional box-type injection base structure also has its structural shortcomings, that is, during the injection process, the guide rail installation part is prone to deformation and damage to the slider.

Therefore, there is an urgent need to design an injection molding device to avoid the impact of its deformation on the guide rail.

Contents of the invention

In order to solve the technical problem of guide rails caused by deformation of the injection molding device mentioned in the background art, this application provides an injection molding device and an injection molding machine. The injection base assembly does not deform when stressed and is easy to process.

In order to achieve the above purpose, the specific technical solutions of an injection molding device and injection molding machine of this application are as follows:

The present application provides an injection molding device, which includes an injection base assembly, a plasticizing assembly and a screw assembly. The plasticizing assembly is connected to the screw assembly. The screw assembly is arranged through the injection base assembly. The injection base assembly is arranged along both sides of the first direction. There is an opening, and the screw assembly drives the plasticizing assembly to perform glue injection on the injection base assembly.

As an embodiment provided by the present application, the ejection platform assembly includes a top plate and a bottom plate. The two ends of the top plate and the bottom plate are connected with a first installation plate and a second installation plate. The top plate, the bottom plate, the first installation plate and the second installation plate surround Set up the injection pedestal assembly.

As an embodiment provided by this application, the top plate, the bottom plate, the first mounting plate and the second mounting plate are an integrally formed structure.

As an embodiment provided by the present application, the first mounting plate and the second mounting plate are arranged sequentially along the first direction, so that the top plate, the bottom plate, the first mounting plate and the second mounting plate surround and form an opening.

As an embodiment provided by this application, a base body is provided below the shooting platform base assembly, and the bottom plate and the base body are fixedly connected.

As an embodiment provided by this application, a fixed seat is provided on the side wall of the bottom plate, and the base and the fixed seat are fixedly connected.

As an embodiment provided by this application, a sliding structure is provided on the side wall of the bottom plate, and a fitting portion is provided on the plasticizing assembly. The sliding structure and the fitting portion are slidingly connected to allow the fitting portion to move on the sliding structure.

As an embodiment provided by this application, the sliding structure includes a guide rail, and the guide rail is fixedly connected along the side wall of the base plate.

As an embodiment provided by this application, a slide block is provided on the fitting part, and the slide block is slidingly connected to the guide rail.

As an embodiment provided by the present application, the screw assembly includes a screw and a bearing. The outer wall of the screw is sleeved with a bearing. The second mounting plate is provided with a mounting hole, and a gap is provided between the bearing and the mounting hole.

As an embodiment provided by this application, the bearing is connected to a transmission component, and the transmission component is connected to a first motor. The first motor drives the transmission component to drive the screw assembly to drive the plasticizing component to move within the injection platform assembly.

As an embodiment provided by this application, the top plate, the bottom plate, the first mounting plate and the second mounting plate are surrounded to form an accommodation chamber, and the plasticizing component is accommodated in the accommodation chamber.

As an embodiment provided by this application, the plasticizing assembly includes a plasticizing seat, and a second motor is provided on the plasticizing seat, so that the second motor is accommodated in the accommodation chamber.

This application also provides an injection molding machine, including the injection molding device as provided above.

The application provides an injection molding device and an injection molding machine that change the installation direction of the injection base assembly, thereby making the injection base assembly less likely to deform when stressed and facilitating processing. The injection guide rail is installed on the side wall of the base plate. When the injection platform assembly is stressed, the slider moves in the direction perpendicular to the injection direction, so that the guide rail and the slider are not easily damaged. Change the installation position of the plasticizing component for easy installation and maintenance.

The above description is only an overview of the technical solutions of the present application. In order to have a clearer understanding of the technical means of the present application, they can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable. , the specific implementation methods of the present application are specifically listed below.

Description of the drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be construed as limiting the application. Also throughout the drawings, the same reference characters are used to designate the same components. In the attached picture:

Figure 1 is a schematic diagram of the overall structure of an injection molding device in the prior art;

Figure 2 is a front view of an injection molding device in the prior art;

Figure 3 is a cross-sectional view along the A-A direction in Figure 2;

Figure 4 is a partially enlarged schematic diagram of part A in Figure 3;

Figure 5 is a partially enlarged schematic diagram of part B in Figure 3;

Figure 6 is a schematic structural diagram of the launch pedestal assembly in the prior art;

Figure 7 is a schematic diagram of the overall structure of the injection molding device of the present application;

Figure 8 is a front view of the injection molding device of the present application;

Figure 9 is a cross-sectional view along the B-B direction in Figure 8;

Figure 10 is a partially enlarged schematic diagram of part C in Figure 9;

Figure 11 is a schematic structural diagram of the shooting platform assembly of the present application;

Figure 12 is a schematic structural diagram of the pre-molded seat of the present application;

Figure 13 is a schematic diagram of the stress deformation simulation of the ejection base assembly in the prior art;

Figure 14 is a schematic diagram of the stress and deformation simulation of the injection platform assembly of the present application.

1. First side panel; 101. Installation position; 2. Second side panel; 3. Third side panel; 4. Fourth side panel; 5. Track; 51. First guide rail; 52. Second guide rail; 6 , sliding assembly; 61. first sliding member; 62. second sliding member; 7. shooting platform assembly; 71. top plate; 72. first mounting plate; 73. second mounting plate; 74. bottom plate; 741. fixed seat ; 742. Installation part; 8. First motor; 9. Transmission component; 10. Screw; 11. Second motor; 12. Base; 13. Slider; 14. Guide rail; 15. Pre-molded seat.

Detailed ways

The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

As shown in Figures 1 to 6, a schematic structural diagram of an injection molding device in the prior art is shown. The injection molding device includes a first side plate 1, a second side plate 2, a third side plate 3 and a fourth side plate 4. The first side plate 1 , the second side plate 2 , the third side plate 3 and the fourth side plate 4 are surrounded by an accommodating space, and openings are provided at the top and bottom of the accommodating space. First guide rails 51 and second guide rails 52 are provided on the top walls of the first side panel 1 and the second side panel 2. The first guide rails 51 and the second guide rails 52 are provided with mounting seats. The first sliding seats are provided on the mounting seats. The first sliding part 61 and the first guide rail 51 are in sliding fit, and the second sliding part 62 and the second guide rail 52 are in sliding fit, so that the mounting base is on the first guide rail 51 and the second guide rail 52 Sliding connection. A melting motor is provided on the mounting base so that the melting motor can slide on the track 5 . The first side plate 1 and the second side plate 2 connecting the third side plate 3 and the fourth side plate 4 are arranged in sequence along the direction of glue injection, and the plasticizing seat assembly is installed on the top of the first side plate 1 and the second side plate 2 on the wall. Since there is no support structure between the first side plate 1 and the second side plate 2, the first side plate 1 and the second side plate 2 are prone to deform inwardly at the same time when the shot base assembly 7 is stressed, thereby squeezing the sliding parts, and thus Cause the ball of the sliding part to fail.

As shown in Figures 4 and 5, a sliding assembly 6 is provided on the seat. The sliding assembly 6 includes a first sliding part 61 and a second sliding part 62. The first guide rail 51 is provided on the top wall of the first side plate 1. The first sliding part 61 The first guide rail 51 is installed on one side to avoid the air. The second sliding member 62 is installed sideways, and the second guide rail 52 is installed sideways. In the injection base assembly 7 in the prior art, the plasticizing seat passes above the first side plate 1 and the second side plate 2 of the linear rail, and the first guide rail 51 and the second guide rail 52 are installed with a processing edge. Accuracy to ensure the installation accuracy of track 5. The second sliding part 62 and the plasticizing seat are installed with an edge. The first sliding part 61 is away from the edge, that is, there is a gap. Although the secondary structure can ensure the coaxial arrangement of the screw assembly and the plasticizing seat through installation. , but the impact of the deformation of the ejection base is not considered. Once the ejection base is deformed, the second sliding member 62 will be squeezed. However, the screws of the first sliding member 61 bear shear force, which may easily damage the sliding member or cause the screws of the sliding member to fail.

As shown in Figures 7 to 12, the injection molding device provided by this application includes an injection base assembly 7, a plasticizing assembly and a screw assembly. The plasticizing assembly is connected to the screw assembly, and the screw assembly penetrates the gap between both ends of the injection base assembly 7. The injection platform assembly 7 is provided with openings on both sides along the first direction. The screw rod 10 drives the plasticizing assembly to perform glue injection. The force of the injection platform assembly 7 is offset by the gap between the screw assembly and the injection platform assembly 7 . Specifically, the shooting platform base assembly 7 is provided with openings on the left and right sides along the first direction.

In this embodiment, the shooting platform assembly 7 includes a top plate 71 and a bottom plate 74. The two ends of the top plate 71 and the bottom plate 74 are connected with a first mounting plate 72 and a second mounting plate 73. The top plate 71, the bottom plate 74, and the first mounting plate 72 It is surrounded by the second mounting plate 73 to form the shooting base assembly 7 . The injection platform base assembly 7 is a box-type structure. In the box-type structure, the glue injection direction is set as the first direction. The injection platform base assembly 7 is provided with an opening along the first direction, and the opening direction is arranged in the same direction as the first direction.

Specifically, the first mounting plate 72 and the second mounting plate 73 are provided with through holes. The through holes are used to install the screw assembly, the driving assembly is connected to the screw assembly, the screw assembly is connected to the plasticizing assembly, and the plasticizing assembly is connected to the outlet. The material assembly is connected, and the driving structure drives the screw assembly to rotate, so that the screw assembly drives the plasticizing assembly to move in the accommodation chamber, thereby realizing the discharge of the discharging assembly.

In this embodiment, the driving structure includes a first motor 8. The first motor 8 is connected to a transmission assembly 9. The transmission assembly 9 is generally provided with a pulley transmission. Of course, it can be understood that the transmission assembly 9 can also be provided with other transmissions. Method, here only the transmission method of the pulley will be described as a specific embodiment.

Specifically, the pulley is provided with a bearing, and the bearing is provided on the outer wall of the screw assembly. The bearing and the through hole provided on the second mounting plate 73 have a clearance fit, so that when the shot base assembly 7 moves as a whole, it can move within the clearance, thereby offset part of the deformation force.

As a preferred embodiment, the top plate 71 , the bottom plate 74 , the first mounting plate 72 and the second mounting plate 73 are an integrally formed structure. The one-piece structure of the injection base assembly 7 is easy to install and has better toughness, preventing the force in the injection direction from being transmitted to the injection base assembly 7 to damage the slider 13 and the guide rail 14. It is easy to process and install, and can ensure the accuracy of the equipment and at the same time. Reduce the impact of force deformation on the slider 13 of the injection guide rail 14.

Specifically, a sliding structure is provided on the side wall of the bottom plate 74, and a fitting portion is provided on the plasticizing assembly. The sliding structure and the fitting portion are slidingly connected, so that the fitting portion moves on the sliding structure. The sliding structure includes guide rails 14, which are fixedly connected along the side walls of the bottom plate 74. A slider 13 is provided on the mating part, and the slider 13 and the guide rail 14 are slidingly connected. Of course, it can be understood that the slider 13 and the guide rail 14 can be configured in other structures. Here, only the structures of the slider 13 and the guide rail 14 in the prior art are used for description.

In this embodiment, the first mounting plate 72 and the second mounting plate 73 are arranged sequentially along the first direction, so that the top plate 71 , the bottom plate 74 , the first mounting plate 72 and the second mounting plate 73 surround and form an opening. Since the deformation of the injection base assembly 7 is not due to the action of gravity, but is caused by force deformation, when the injection screw 10 and the bearing are deformed up and down, there is a gap to float, and no force will act on the slider 13. Of course, according to the transmission of force and the relationship between action force and reaction force, when force is applied, the deformation of the injection platform assembly 7 along the Y-axis direction is very small. On the other hand, the deformation direction of the injection platform assembly 7 is opposite to the gravity direction of the plasticizing seat, which can offset Part of it is deformed. Finally, when the slider 13 is stressed by the injection base assembly 7, there is a certain gap between the injection screw 10 and the screw nut 10. The entire plasticizing assembly can float in the up and down deformation direction, and the slider 13 of the guide rail 14 is not easily damaged.

Specifically, a bottom plate 74 is provided below the shooting platform base assembly 7 and is fixedly connected to the base body. A mounting portion 742 is provided on the side wall of the bottom plate 74 , and a fixing base 741 is disposed on the mounting portion 742 . The base 12 and the fixing base 741 are fixedly connected. The fixed base 741 and the base 12 are fixedly connected through screws. Of course, it can be understood that the fixed base 741 and the base 12 can also be fixedly connected through other structures.

In this embodiment, the screw assembly includes a screw 10 and a bearing. The outer wall of the screw 10 is sleeved with a bearing. The second mounting plate 73 is provided with a mounting hole, and a gap is provided between the bearing and the mounting hole. The bearing is connected with a transmission assembly 9 , which is connected to the first motor 8 . The first motor 8 drives the transmission assembly 9 so that the screw assembly drives the plasticizing assembly to move in the injection platform assembly 7 .

Specifically, the top plate 71 , the bottom plate 74 , the first mounting plate 72 and the second mounting plate 73 are surrounded to form an accommodation chamber, and the plasticizing component is accommodated in the accommodation chamber. The plasticizing assembly includes a plasticizing seat, and a second motor 11 is provided on the plasticizing seat, so that the second motor 11 is accommodated in the accommodation chamber. The position of the plasticizing seat is rotated 90° relative to the prior art, making it easy to install and maintain.

In this embodiment, the injection platform assembly 7 forms an accommodation chamber. The screw assembly penetrates the accommodation chamber and extends out of the first mounting plate 72 and the second mounting plate 73 of the injection platform assembly. A pre-molded plastic rod is provided in the accommodation chamber. The pre-molded seat 15 is provided with a second motor 11 and a through hole is provided on the pre-molded seat 15. The screw assembly extends through the through hole and out of the first mounting plate 72 of the injection base assembly.

As shown in Figures 13 and 14, the finite element analysis simulation diagram of the injection base assembly 7 provided by the prior art and the present application is shown. The load and boundary conditions are applied to the injection base assembly 7. Taking the injection molding machine as an example, the injection base assembly The axial force experienced by 7 is 346720N. The time load and boundary conditions of the pedestal assembly 7 are fixed. The right mounting plate is fixed and the load is applied to the left mounting plate. The deformation of the two different pedestal assemblies 7 is shown in the figure. From It can be seen from the finite element results that the first side plate 1 and the second side plate 2 of the ejection platform assembly 7 are deformed inward. The maximum displacement of the ejection platform in the prior art along the deformation direction is 0.1028mm. The ejection platform provided by this application The maximum displacement of component 7 along the deformation direction is 0.079mm.

It can be seen from this that in the injection molding device provided by this application, the injection slider 13 is installed on the side walls of the first mounting plate 72 and the second mounting plate 73 , and the guide rail 14 and the slider 13 are designed to be placed side by side, making it easy to ensure that the guide rail 14 installation accuracy. On the other hand, when the injection base assembly 7 is floating as a whole and the plasticizing base is deformed due to force, the entire plasticizing base can move upward to a certain extent. The upward direction here is the direction perpendicular to the direction of injection. The screws of the block 13 and the slider 13 are not subject to any force and are not easily damaged.

This application provides an injection molding device and an injection molding machine that change the installation direction of the injection base assembly 7, so that the injection base assembly 7 is less likely to deform when it is stressed and is easy to process. The injection guide rail 14 is installed on the side wall of the bottom plate 74. When the injection platform assembly 7 is stressed, the slider 13 moves in a direction perpendicular to the injection direction, so that the guide rail 14 and the slider 13 are not easily damaged. Change the installation position of the plasticizing component for easy installation and maintenance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (14)

1. An injection molding device, characterized in that it includes an injection base assembly, a plasticizing assembly and a screw assembly, the plasticizing assembly is connected to the screw assembly, the screw assembly is disposed through the injection base assembly, and the The injection platform base assembly is provided with openings on both sides along the first direction, and the screw assembly drives the plasticizing assembly to perform glue injection on the injection platform base assembly.
2. The injection molding device according to claim 1, wherein the injection platform assembly includes a top plate and a bottom plate, and a first mounting plate and a second mounting plate are respectively connected to both ends of the top plate and the bottom plate. , the bottom plate, the first mounting plate and the second mounting plate are surrounded to form a shooting platform base assembly.
3. The injection molding device according to claim 2, characterized in that the top plate, the bottom plate, the first mounting plate and the second mounting plate are an integrally formed structure.
4. The injection molding device according to claim 2, wherein the first mounting plate and the second mounting plate are arranged sequentially along the first direction, so that the top plate, the bottom plate, the first mounting plate The opening is formed around the second mounting plate.
5. The injection molding device according to claim 2, characterized in that a base body is provided below the injection platform base assembly, and the bottom plate and the base body are fixedly connected.
6. The injection molding device according to claim 2, characterized in that a fixing seat is provided on the side wall of the bottom plate, and the bottom plate and the fixing seat are fixedly connected.
7. The injection molding device according to claim 2, characterized in that a sliding structure is provided on the side wall of the bottom plate, a fitting part is provided on the plasticizing component, and the sliding structure and the fitting part are slidingly connected to The fitting part is moved on the sliding structure.
8. The injection molding device according to claim 7, wherein the sliding structure includes a guide rail, and the guide rail is fixedly connected along the side wall of the bottom plate.
9. The injection molding device according to claim 8, characterized in that a slider is provided on the fitting part, and the slider is slidingly connected to the guide rail.
10. The injection molding device according to claim 2, wherein the screw assembly includes a screw and a bearing, the outer wall of the screw is provided with a bearing, and the second mounting plate is provided with a mounting hole. The clearance between the bearing and the mounting hole is set.
11. The injection molding device according to claim 10, characterized in that the bearing is connected to a transmission component, the transmission component is connected to a first motor, and the first motor drives the transmission component to drive the screw rod. The assembly drives the plasticizing assembly to move within the injection platform assembly.
12. The injection molding device according to claim 2, characterized in that the top plate, the bottom plate, the first mounting plate and the second mounting plate are surrounded to form an accommodation chamber, and the plasticizing component accommodates in the holding chamber.
13. The injection molding device according to claim 12, characterized in that the plasticizing assembly includes a plasticizing seat, and a second motor is provided on the plasticizing seat, so that the second motor is accommodated in the housing. inside the chamber.
14. An injection molding machine, characterized by comprising the injection molding device according to any one of claims 1 to 13.

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