Injection structure of injection molding machine

Abstract

The utility model relates to the field of injection molding machines, and discloses an injection structure of an injection molding machine, which comprises an injection table front plate, a charging barrel, an oil cylinder and an injection table rear plate, the charging barrel and the oil cylinder are mounted in the injection table front plate, and the injection table rear plate can be close to the injection table front plate and extrude raw materials in the charging barrel for injection molding or far away from the injection table front plate to reset. The injection table front plate comprises a front plate main body for accommodating a charging barrel, mounting modules which are symmetrically arranged on the two sides of the front plate main body and are used for accommodating an oil cylinder, and reinforcing ribs which are arranged on the upper end surface and the lower end surface of the front plate main body in a convex manner and are fixedly connected with the mounting modules on the two sides at the same time, and the reinforcing ribs are arranged at the two ends of the front plate main body in the axial direction of the charging barrel; according to the injection structure of the injection molding machine, the reinforcing ribs are additionally arranged at the parts with large stress, and the distribution quantity of reinforcing materials is consistent with that of stress loads, so that the performance and the reliability of injection parts are improved on the premise of not increasing the weight of the parts.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machines, in particular to an injection structure of an injection molding machine. Background Art

[0002] An injection molding machine is a device used to produce plastic products, and it mainly achieves the injection molding of plastic products by injecting parts.

[0003] Chinese patent application number 202223469699.5 discloses an injection molding machine with increased injection volume and a glue injection cylinder structure and an injection molding machine thereof, including a shooting platform front plate assembly, a screw barrel assembly and a shooting platform rear plate assembly, the shooting platform front plate assembly includes a shooting platform front plate and a glue injection cylinder, the glue injection cylinder is embedded in the shooting platform front plate, the glue injection cylinder is connected to the shooting platform rear plate assembly through its glue injection piston rod, the shooting platform rear plate assembly includes a shooting platform rear plate, the shooting platform rear plate is connected to the glue injection piston rod, the screw barrel assembly includes a melt glue barrel, a melt glue screw and a nozzle, the melt glue barrel is fixedly arranged on the shooting platform front plate, and the melt glue screw is rotatably connected to the shooting platform rear plate.

[0004] This patent uses the injection cylinder to control the rear plate of the shooting platform to drive the melt screw to move close to the front plate of the shooting platform. The melt screw squeezes the molten rubber material, so that the molten rubber material in the melt cylinder is ejected from the nozzle and injected into the mold.

[0005] However, when the injection cylinder controls the movement of the rear plate of the shooting platform, the front plate of the shooting platform is pulled by the cylinder on both sides and pushed by the melt screw in the middle. The larger the spacing between the injection cylinders, the greater the bending moment borne by the front plate of the shooting platform. The simplified force diagram is as follows: Figure 1 As shown. After being stressed, the front plate of the shooting platform will have a tendency to deform. For details, please refer to Figure 2 That is, there is a deformation tendency of inward squeezing on the end of the front plate of the shooting platform close to the rear plate of the shooting platform, and there is a deformation tendency of outward stretching on the end of the front plate of the shooting platform away from the rear plate of the shooting platform, while the middle part is not subjected to force or is subjected to a smaller force, and there is no deformation or the deformation is small. That is, the force load distribution of the front plate of the shooting platform along the axial direction of the melt cylinder is a large-small-large distribution. As can be seen from the drawings of the comparative document, the existing front plate of the shooting platform includes a front plate main body for mounting the melt cylinder, and an installation module for embedding the oil cylinder on both sides of the front plate main body. A connecting block connected to the front plate main body and the installation module is provided between the two, but the overall thickness of the connecting block is consistent. If the thickness is too thin, it does not have the ability to resist deformation, and if the thickness is too large, the cost will increase. Utility Model Content

[0006] The utility model provides an injection structure for an injection molding machine in view of the shortcomings of the prior art that the front plate of the shooting platform is too high in cost or is easily deformed during the injection process.

[0007] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0008] An injection structure of an injection molding machine includes a shooting platform front plate, a barrel and an oil cylinder installed in the shooting platform front plate, and a shooting platform rear plate that can approach the shooting platform front plate and extrude the raw material inside the barrel for injection molding or move away from the shooting platform front plate for reset. The movement of the shooting platform rear plate is controlled by the oil cylinder. The shooting platform front plate includes a front plate main body for accommodating the barrel, mounting modules symmetrically arranged on both sides of the front plate main body for accommodating the oil cylinder, and reinforcing ribs protruding outwardly from the upper and lower end surfaces of the front plate main body and fixedly connected to the mounting modules on both sides. The reinforcing ribs are arranged at both ends of the front plate main body along the axial direction of the barrel.

[0009] By adopting the above scheme, since the force load distribution of the front plate of the shooting platform along the axial direction of the barrel is large-small-large, the reinforcing ribs are arranged on both ends of the front plate body along the axial direction of the barrel, and are symmetrically arranged on both sides of the front plate body. That is, the arrangement of the reinforcing ribs makes the distribution of the connecting material between the front plate body and the mounting module along the axial direction of the barrel more-less-more, that is, the amount of the connecting material distribution is consistent with the force load distribution. Without increasing the weight of the parts, the deformation resistance of the front plate of the shooting platform is improved, and the performance and reliability of the injection components are improved.

[0010] Preferably, two installation cavities for accommodating oil cylinders are vertically spaced apart on the installation module.

[0011] With the above solution, the four oil cylinders can generate twice the injection pressure compared with the two oil cylinders, that is, when the same injection pressure is generated, the cylinder diameter and rod diameter of a single oil cylinder can be smaller, and after cost budgeting, the parts cost of four relatively small oil cylinders is lower than that of two relatively large oil cylinders. In addition, after simulation software analysis and actual measurement, when the same injection pressure is generated, the front plate and the rear plate of the shooting platform of the same weight will produce lower stress and smaller deformation under the action of four relatively small thrusts than under the action of two relatively large thrusts. Smaller deformation will cause less deflection of the piston and piston rod in the oil cylinder during the injection action, and it has higher injection accuracy and injection stability than the two oil cylinders.

[0012] Preferably, the linear movement of the rear plate of the shooting platform is controlled by a guide structure, which includes a linear rail support fixedly connected to the front plate of the shooting platform, a linear rail fixedly arranged on the linear rail support, and a slider fixedly connected to the rear plate of the shooting platform and slidingly cooperating with the linear rail guide.

[0013] By adopting the above scheme, the slider and the linear rail are linearly guided and slidably matched, the slider is fixed on the rear plate of the shooting platform, and the linear rail and the front plate of the shooting platform are fixed on the linear rail support, thereby realizing the linear movement of the rear plate of the shooting platform relative to the front plate of the shooting platform.

[0014] Preferably, a screw is provided on the rear plate of the shooting platform for squeezing the material barrel to discharge the material when the rear plate of the shooting platform moves close to the front plate of the shooting platform.

[0015] By adopting the above scheme, when the rear plate of the shooting platform moves close to the front plate of the shooting platform, the screw is driven to move synchronously, and the screw extrude the raw materials in the barrel, and the raw materials are extruded, injected into the mold and plasticized.

[0016] Preferably, one end of the piston rod of the oil cylinder away from the cylinder body is fixedly connected to the rear plate of the shooting platform.

[0017] By adopting the above solution, the piston rod of the oil cylinder can be extended and retracted to control the rear plate of the shooting platform to move closer to or away from the front plate of the shooting platform.

[0018] The utility model has significant technical effects due to the adoption of the above technical scheme: since the force load distribution of the front plate of the shooting platform along the axial direction of the barrel is large-small-large, the reinforcing ribs are arranged on both ends of the front plate body along the axial direction of the barrel, and are symmetrically arranged on both sides of the front plate body, that is, the arrangement of the reinforcing ribs makes the distribution of the connecting material between the front plate body and the mounting module along the axial direction of the barrel more-less-more, that is, the amount of the connecting material distribution is consistent with the force load distribution, and the deformation resistance of the front plate of the shooting platform is improved without increasing the weight of the parts, thereby improving the performance and reliability of the injection components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a simplified schematic diagram of the forces acting on the front plate of the shooting platform in the prior art;

[0020] Figure 2 It is a simplified diagram showing the deformation trend of the front plate of the shooting platform after being subjected to force in the prior art;

[0021] Figure 3 is a structural schematic diagram of an injection structure of an injection molding machine in this embodiment;

[0022] Figure 4 yes Figure 3 A in the enlarged view;

[0023] Figure 5 It is an axonometric view of a front plate of a shooting platform in an injection structure of an injection molding machine in this embodiment;

[0024] Figure 6 yes Figure 5 Sectional view at BB in the figure.

[0025] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Front plate of the shooting platform; 101. Front plate body; 102. Mounting module; 103. Reinforcing ribs; 2. Barrel; 3. Cylinder; 4. Back plate of the shooting platform; 5. Mounting cavity; 6. Linear rail support; 7. Linear rail; 8. Slider; 9. Screw. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Example

[0028] An injection molding machine injection structure, referring to Figures 3 to 6 , including a shooting platform front plate 1 and a shooting platform rear plate 4 that can move close to or away from the shooting platform front plate 1. A barrel 2 and a cylinder 3 are installed in the shooting platform front plate 1. The end of the piston rod of the cylinder 3 that is away from its cylinder body is fixedly connected to the shooting platform rear plate 4. The piston rod of the cylinder 3 can be extended and retracted to control the shooting platform rear plate 4 to move close to or away from the shooting platform front plate 1. A screw 9 is arranged on the shooting platform rear plate 4. When the shooting platform rear plate 4 moves close to the shooting platform front plate 1, the screw 9 is driven to move synchronously. The screw 9 squeezes the raw materials in the barrel 2, and the raw materials are squeezed and injected into the mold for plasticization.

[0029] In order to ensure the linear movement of the shooting platform rear plate 4, a guide structure is further provided between the shooting platform rear plate 4 and the shooting platform front plate 1, and the guide structure includes a linear rail support 6 fixedly connected to the shooting platform front plate 1, a linear rail 7 is fixedly provided on the linear rail support 6, and a slider 8 is fixedly connected to the shooting platform rear plate 4, and the slider 8 is guided and slidably matched with the linear rail 7. The slider 8 and the linear rail 7 are linearly guided and slidably matched, the slider 8 is fixed on the shooting platform rear plate 4, and the linear rail 7 and the shooting platform front plate 1 are fixed on the linear rail support 6, so as to realize the linear movement of the shooting platform rear plate 4 relative to the shooting platform front plate 1.

[0030] The front plate 1 of the shooting platform includes a front plate body 101 that can accommodate the barrel 2. The front plate body 101 is symmetrically provided with mounting modules 102 for accommodating the oil cylinder 3 on both sides. The upper and lower end surfaces of the front plate body 101 are convexly provided with reinforcing ribs 103 that are fixedly connected to the mounting modules 102 on both sides at the same time. The reinforcing ribs 103 are arranged at both ends of the front plate body 101 along the axial direction of the barrel 2. Since the force load distribution of the front plate 1 of the shooting platform along the axial direction of the barrel 2 is large-small-large, the reinforcing ribs 103 are arranged at both ends of the front plate body 101 along the axial direction of the barrel 2, and are symmetrically arranged on both sides of the front plate body 101, that is, the arrangement of the reinforcing ribs 103 makes the connection material between the front plate body 101 and the mounting module 102 distributed along the axial direction of the barrel 2 more-less-more, that is, the amount of connection material distribution is consistent with the force load distribution, and the deformation resistance of the front plate 1 of the shooting platform is improved without increasing the weight of the parts, and the performance and reliability of the injection parts are improved.

[0031] Two mounting cavities 5 for accommodating oil cylinders 3 are vertically spaced apart on each mounting module 102. There are four oil cylinders 3. When the cylinder diameter and rod diameter of the oil cylinders 3 are the same, the four oil cylinders 3 can generate twice the injection pressure compared with the two oil cylinders 3, that is, when the same injection pressure is generated, the cylinder diameter and rod diameter of a single oil cylinder 3 can be smaller, and after cost budgeting, the parts cost of four relatively small oil cylinders 3 is lower than that of two relatively large oil cylinders 3. In addition, after simulation software analysis and actual measurement, when the same injection pressure is generated, the front plate 1 and the rear plate 4 of the shooting platform of the same weight generate lower stress and smaller deformation under the action of four relatively small thrusts than under the action of two relatively large thrusts, and smaller deformation will cause smaller deflection effect on the piston and piston rod in the oil cylinder 3 during the injection action, and compared with the double oil cylinder 3, it has higher injection accuracy and injection stability.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An injection molding machine injection structure, comprising a shooting platform front plate (1), a barrel (2) and an oil cylinder (3) installed in the shooting platform front plate (1), and a shooting platform rear plate (4) that can approach the shooting platform front plate (1) and squeeze the material inside the barrel (2) for injection molding or move away from the shooting platform front plate (1) to reset, the movement of the shooting platform rear plate (4) being controlled by the oil cylinder (3), characterized in that: The front plate (1) of the shooting platform comprises a front plate body (101) for accommodating a barrel (2), a mounting module (102) symmetrically arranged on both sides of the front plate body (101) for accommodating an oil cylinder (3), and reinforcing ribs (103) protruding outwardly from the upper and lower end surfaces of the front plate body (101) and fixedly connected to the mounting modules (102) on both sides. The reinforcing ribs (103) are arranged at both ends of the front plate body (101) along the axial direction of the barrel (2).

2. The injection molding machine injection structure according to claim 1, characterized in that: Two installation cavities (5) for accommodating the oil cylinder (3) are vertically spaced apart on the installation module (102).

3. The injection molding machine injection structure according to claim 1, characterized in that: The linear movement of the shooting platform rear plate (4) is controlled by a guide structure, which comprises a linear rail support (6) fixedly connected to the shooting platform front plate (1), a linear rail (7) fixedly arranged on the linear rail support (6), and a slider (8) fixedly connected to the shooting platform rear plate (4) and slidingly cooperating with the linear rail (7) for guiding.

4. The injection molding machine injection structure according to claim 1, characterized in that: A screw rod (9) is arranged on the rear plate (4) of the shooting platform for squeezing the material barrel (2) to discharge material when the rear plate (4) of the shooting platform moves close to the front plate (1) of the shooting platform.

5. The injection molding machine injection structure according to claim 1, characterized in that: One end of the piston rod of the oil cylinder (3) away from the cylinder body is fixedly connected to the rear plate (4) of the shooting platform.

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