A mold capable of reducing the step difference between front and rear mold cores

Abstract

The utility model provides a mold that can reduce the step difference between the front and rear mold cores, including: a base and a movable mold plate, the upper surface of the base is fixedly connected to the electric rod through a groove, and the upper surface of the base is fixedly connected to the rear mold core through a fixed mold plate, and the mold cavity opened by the rear mold core is slidably connected to the top plate, and the lower surface of the top plate is fixedly connected to the telescopic rod of the electric rod, and the upper surface of the base is fixedly connected to the fixed frame, and the lower surface of the movable mold plate is fixedly connected to the front mold core, and exhaust grooves are symmetrically opened at both ends of the movable mold plate and the front mold core, and the upper end of the exhaust groove opened by the front mold core is fixedly connected to the limiting plate, and the lower end of the exhaust groove opened by the front mold core is slidably connected to the moving column. The utility model cooperates with the limiting plate, the limiting rod and the moving column, so that the exhaust groove of the mold can not only smoothly discharge the gas in the mold cavity, but also can correspondingly block the injection molding raw materials, so as to avoid the injection molding raw materials from flowing out of the exhaust groove, and reduce the waste rate of the injection molding raw materials.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold capable of reducing the step difference between front and rear mold cores. Background Art

[0002] Injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise size; injection molding is a processing method used in mass production of certain complex-shaped parts; specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by the injection molding machine, and after cooling and solidification, a molded product is obtained, and the step difference refers to the matching deviation of the positions of the parting surfaces of two mold positioning parts or front and rear molds due to the deviation in processing accuracy. The existence of the step difference will greatly affect the appearance quality of the product; at present, in order to reduce the step difference between the front and rear mold cores, it is generally achieved by improving the processing accuracy of the front and rear mold cores or using complex and cumbersome repair methods, but these methods are relatively costly and it is difficult to reduce the mold step difference of the front and rear mold cores at a low cost. In addition, the exhaust holes set in some molds can assist in exhausting the air inside the mold cavity, but they will also increase the probability of some injection molding materials flowing out of the exhaust holes, making it easy for the injection molding materials to be wasted unnecessary. At the same time, some molds have a small number of exhaust holes, so that the gas in the mold cavity cannot be discharged in time, and then the air pressure in the mold cavity will increase within a certain period of time, thereby increasing the step difference of the injection molded product after molding, and reducing the quality of the product. Utility Model Content

[0003] In order to overcome the defects of the prior art, a mold capable of reducing the step difference between the front and rear mold cores is provided to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, a mold capable of reducing the step difference between front and rear mold cores is provided, comprising: a base and a movable mold core, the upper surface of the base being fixedly connected to an electric rod through a groove, and the upper surface of the base being fixedly connected to a rear mold core through a fixed mold core, and a top plate being slidably connected in a mold cavity provided in the rear mold core, and a telescopic rod of the electric rod being fixedly connected on the lower surface of the top plate, and at the same time, the upper surface of the base being fixedly connected to a fixed frame, and a servo electric cylinder being fixedly connected to the telescopic rod of the servo electric cylinder through a mounting plate, and the lower surface of the movable mold core being fixedly connected to a front mold core, and exhaust grooves are symmetrically provided at both ends of the movable mold core and the front mold core, and the upper ends of the exhaust grooves provided in the front mold core are fixedly connected to a limiting plate, and the lower ends of the exhaust grooves provided in the front mold core are slidably connected to a moving column, and through holes are provided in the limiting plate and the moving column, and the upper surface of the moving column is fixedly connected to the limiting rod, and the upper end of the limiting rod is slidably connected in the limiting hole provided in the limiting plate, and the two ends of the lower surface of the movable mold core are symmetrically connected to positioning columns, and a positioning groove is provided on the upper surface of the fixed mold core corresponding to the position of the positioning column.

[0005] Preferably, multiple sets of exhaust grooves are provided at parallel and equidistant locations at both ends of the upper surface of the movable template, the exhaust grooves are cylindrical in structure, and the number and positions of the exhaust grooves provided on the front mold core and the movable template correspond one to one, and the cross-section of the movable template is a [-shaped structure.

[0006] Preferably, the front mold core is fixedly connected to the groove opened on the lower surface of the movable mold plate, and the limit plate is fixedly connected to the exhaust groove opened in the front mold core, and the limit plate is an overall outer circle and inner square structure, and a plurality of groups of through holes are opened at equal intervals along the circumferential direction on the surface of the limit plate.

[0007] Preferably, the movable column has a cylindrical structure, the sizes of the movable column and the exhaust groove are matched, and a plurality of groups of through holes are opened at equal intervals around the circumference of the movable column, the through holes have a cylindrical structure, and the through holes of the movable column and the through holes of the limit plate are staggered.

[0008] Preferably, the limit rod is T-shaped, the horizontal cross section of the limit rod is square, the sizes of the limit rod and the inner cavity of the limit plate are matched, and the axial cross section formed by the limit rod and the movable column combined together is A-shaped.

[0009] Preferably, the four groups of positioning columns fixedly connected at the four corners of the lower surface of the movable template are all cylindrical structures, and the lower ends of the positioning columns are all truncated cone structures, and the sizes of the positioning columns and the positioning grooves are matched. At the same time, the mounting plate fixedly connected in the middle of the upper surface of the movable template is in a [-shaped structure.

[0010] Preferably, the positioning groove opened on the upper surface of the fixed template is generally cylindrical in structure, the upper opening of the positioning groove is a truncated cone in structure, and the positioning rod fixedly connected to the bottom of the positioning groove is a cylindrical structure, and a positioning hole is opened on the lower surface of the positioning column corresponding to the position of the positioning rod.

[0011] Compared with the prior art, the beneficial effect of the utility model is that through the cooperation of the positioning column, the positioning rod, the positioning groove and the positioning hole, the movable template and the fixed template can be positioned for the second time, thereby helping to improve the accuracy of the front mold core and the rear mold core when the mold is closed, and then helping to reduce the step difference on the surface of the injection molded product. At the same time, through the cooperation of the limit plate, the limit rod, the movable column, the through hole and the exhaust groove, the gas in the mold cavity formed after the mold is closed can be quickly discharged along with the injection of the injection molding raw material, and when the injection molding raw material flows into the exhaust groove, the limit plate and the movable column can cooperate with each other to close the exhaust groove, thereby avoiding the outflow of the injection molding raw material, which can not only reduce the waste of injection molding raw material, but also avoid excessive pressure in the mold cavity, helping to reduce the step difference on the surface of the injection molding product after molding, and improving the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a top view schematic diagram of the movable template of an embodiment of the utility model.

[0014] Figure 3 For the utility model embodiment Figure 1 An enlarged schematic diagram of point A.

[0015] Figure 4 For the utility model embodiment Figure 2 An enlarged schematic diagram of point B.

[0016] In the figure: 1. base; 2. electric rod; 3. fixed platen; 4. rear mold core; 5. positioning rod; 6. positioning column; 7. front mold core; 8. movable platen; 9. fixed frame; 10. servo electric cylinder; 11. moving column; 12. limit rod; 13. limit plate; 14. exhaust groove. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4 As shown, the utility model provides a mold that can reduce the step difference between the front and rear mold cores, including: a base 1 and a movable mold plate 8, the upper surface of the base 1 is fixedly connected to the electric rod 2 through a groove, and the upper surface of the base 1 is fixedly connected to the rear mold core 4 through a fixed mold plate 3, and the mold cavity opened by the rear mold core 4 is slidably connected to the top plate, and the lower surface of the top plate is fixedly connected to the telescopic rod of the electric rod 2, and at the same time, the upper surface of the base 1 is fixedly connected to the fixed frame 9, the top of the fixed frame 9 is fixedly connected to the servo electric cylinder 10, the telescopic rod of the servo electric cylinder 10 is fixedly connected to the movable mold plate 8 through a mounting plate, and the lower surface of the movable mold plate 8 is fixedly connected to the front mold core 4 The mold core 7, and the two ends of the movable mold plate 8 and the front mold core 7 are symmetrically provided with exhaust grooves 14, and the upper ends of the exhaust grooves 14 provided in the front mold core 7 are fixedly connected to the limit plate 13, and the lower ends of the exhaust grooves 14 provided in the front mold core 7 are slidably connected to the moving column 11, and at the same time, through holes are provided in the limit plate 13 and the moving column 11, and the upper surface of the moving column 11 is fixedly connected to the limit rod 12, and the upper end of the limit rod 12 is slidably connected to the limit hole provided in the limit plate 13, and the two ends of the lower surface of the movable mold plate 8 are symmetrically connected to the positioning columns 6, and the upper surface of the fixed mold plate 3 is provided with positioning grooves corresponding to the position of the positioning columns 6.

[0018] In this embodiment, when the mold is required to produce the corresponding injection molded product, the switch of the servo electric cylinder 10 is started, and the telescopic rod of the servo electric cylinder 10 pushes the movable mold plate 8 and the front mold core 7 to move downward synchronously through the mounting plate, and then the positioning column 6 will first be embedded in the positioning groove, so that the initial positioning between the movable mold plate 8 and the fixed mold plate 3 is completed. During the continuous downward movement of the positioning column 6, the positioning rod 5 at the bottom of the positioning groove will be embedded in the positioning hole opened by the positioning column 6, and then the secondary positioning is completed, thereby improving the positioning accuracy when the front mold core 7 and the rear mold core 4 are molded together, and then the raw material is injected into the mold cavity through the injection hole opened by the front mold core 7, and the gas in the mold cavity will be discharged from the exhaust groove 14 through the through hole. Quick outflow. After the injection molding raw material fills the mold cavity, part of the injection molding raw material will flow into the exhaust groove 14. Due to the high viscosity of the injection molding raw material, the injection molding raw material will preferentially push the movable column 11 to move upward, so that the upper surface of the movable column 11 can abut against the surface of the limiting plate 13, and then close the through hole opened by the movable column 11 to prevent the injection molding raw material from flowing out of the exhaust groove 14. A small part of the injection molding raw material will move away from the through hole when pushing the movable column 11 to move, and then the length of the through hole opened in the movable column 11 can effectively prevent the raw material from flowing out of the through hole, thereby preventing the excessive air pressure in the mold cavity from interfering with the shaping of the injection molding raw material and reducing the step difference on the surface of the product after molding.

[0019] As a preferred embodiment, multiple sets of exhaust grooves 14 are opened at parallel and equal intervals at both ends of the upper surface of the movable template 8, the exhaust grooves 14 are cylindrical in structure, and the number and positions of the exhaust grooves 14 opened on the front mold core 7 and the movable template 8 correspond one to one, and the cross-section of the movable template 8 is a [-shaped structure.

[0020] In this embodiment, if Figure 1 and Figure 2 The number and position of the exhaust grooves 14 provided on the front mold core 7 and the movable mold plate 8 correspond one to one, thereby ensuring that the gas in the mold cavity can flow out quickly as the injection molding material is injected, thereby reducing the probability of excessive air pressure in the mold cavity and reducing the step difference on the surface of the injection molded product.

[0021] As a preferred embodiment, the front mold core 7 is fixedly connected to the groove opened on the lower surface of the movable mold plate 8, and the limit plate 13 is fixedly connected to the exhaust groove 14 opened in the front mold core 7, and the limit plate 13 is an overall outer circle and inner square structure, and a plurality of groups of through holes are opened at equal intervals along the circumferential direction on the surface of the limit plate 13.

[0022] In this embodiment, if Figure 3 and Figure 4 The setting of the limit plate 13 can effectively limit the moving range of the movable column 11, and prevent the injection molding material from pushing the movable column 11 out of the exhaust groove 14. At the same time, the setting of the through hole ensures that the gas can flow out of the exhaust groove 14 smoothly, avoiding the problem of excessive air pressure in the mold cavity.

[0023] As a preferred embodiment, the movable column 11 has a cylindrical structure, the sizes of the movable column 11 and the exhaust groove 14 are matched, and a plurality of groups of through holes are opened at equal intervals around the circumference of the movable column 11, and the through holes have a cylindrical structure. At the same time, the through holes of the movable column 11 and the through holes of the limiting plate 13 are staggered.

[0024] In this embodiment, if Figure 3 and Figure 4 The sizes of the moving column 11 and the exhaust groove 14 are matched, which can help enhance the stability of the movement of the moving column 11 and improve the sealing of the connection between the moving column 11 and the exhaust groove 14, thereby preventing the injection molding material from penetrating from the gap. At the same time, the through hole of the moving column 11 and the through hole of the limiting plate 13 are staggered, so that when the injection molding material flows into the exhaust groove 14, the through hole of the moving column 11 can be closed to prevent the injection molding material from flowing out of the exhaust groove 14 through the through hole. In addition, the surface of the moving column 11 and the side of the through hole are smoothed to reduce the probability of the injection molding material adhering.

[0025] As a preferred embodiment, the limit rod 12 has a T-shaped structure, the horizontal cross-section of the limit rod 12 is a square structure, and the sizes of the inner cavities of the limit rod 12 and the limit plate 13 are compatible. At the same time, the axial cross-section formed by the combination of the limit rod 12 and the movable column 11 is an A-shaped structure.

[0026] In this embodiment, if Figure 3 and Figure 4 The square structure of the limiting rod 12 can effectively limit the rotation of the movable column 11, so that the movable column 11 can only translate axially in the exhaust groove 14, thereby effectively preventing the through holes of the movable column 11 from being connected to each other when the movable column 11 abuts against the limiting plate 13.

[0027] As a preferred embodiment, the four groups of positioning columns 6 fixedly connected at the four corners of the lower surface of the movable template 8 are all cylindrical in structure, and the lower ends of the positioning columns 6 are all truncated cone-shaped in structure, and the sizes of the positioning columns 6 and the positioning grooves are matched. At the same time, the mounting plate fixedly connected in the middle of the upper surface of the movable template 8 is in a [-shaped structure.

[0028] In this embodiment, if Figure 1 and Figure 2 The structural setting of the lower end of the positioning column 6 can reduce the difficulty of embedding the positioning column 6 into the positioning groove, and the sizes of the positioning column 6 and the positioning groove are both finely processed, which can then assist in enhancing the positioning effect between the movable template 8 and the positioning plate.

[0029] As a preferred embodiment, the positioning groove opened on the upper surface of the fixed template 3 is generally cylindrical in structure, the upper opening of the positioning groove is a truncated cone in structure, and the positioning rod 5 fixedly connected to the bottom of the positioning groove is a cylindrical structure, and a positioning hole is opened on the lower surface of the positioning column 6 corresponding to the position of the positioning rod 5.

[0030] In this embodiment, if Figure 1 and Figure 2 The positioning rod 5 and the corresponding positioning hole are both finely processed, so that the positioning effect between the positioning column 6 and the positioning groove can be corrected for the second time to avoid accidental wear or bending of the positioning column 6, which causes positioning deviation between the positioning column 6 and the positioning groove, thereby facilitating workers to quickly identify and avoid producing low-quality products.

[0031] The mold of the utility model which can reduce the step difference between the front and rear mold cores cooperates with the limiting plate 13, the limiting rod 12 and the movable column 11, so that the exhaust groove 14 of the mold can not only smoothly exhaust the gas in the mold cavity, but also can correspondingly block the injection molding raw material to avoid the injection molding raw material from flowing out of the exhaust groove 14, reduce the waste rate of the injection molding raw material, and avoid excessive air pressure in the mold cavity, thereby ensuring that the injection molding raw material can be smoothly molded.

Claims

1. A mold capable of reducing the step difference between the front and rear mold cores, comprising: The base (1) and the movable platen (8) are characterized in that: the upper surface of the base (1) is fixedly connected to the electric rod (2) through a groove, and the upper surface of the base (1) is fixedly connected to the rear mold core (4) through a fixed mold core (3), and the mold cavity opened by the rear mold core (4) is slidably connected to the top plate, and the lower surface of the top plate is fixedly connected to the telescopic rod of the electric rod (2), and at the same time, the upper surface of the base (1) is fixedly connected to the fixed frame (9), the top of the fixed frame (9) is fixedly connected to the servo electric cylinder (10), the telescopic rod of the servo electric cylinder (10) is fixedly connected to the movable platen (8) through a mounting plate, and the lower surface of the movable platen (8) is fixedly connected to the front mold core (7), and the movable platen (8) and the front mold core (7) are fixedly connected to the front mold core (7). Both ends of the mold core (7) are symmetrically provided with exhaust grooves (14), and the upper end of the exhaust groove (14) provided on the front mold core (7) is fixedly connected to the limit plate (13), while the lower end of the exhaust groove (14) provided on the front mold core (7) is slidably connected to the movable column (11), and through holes are provided in the limit plate (13) and the movable column (11), and the upper surface of the movable column (11) is fixedly connected to the limit rod (12), and the upper end of the limit rod (12) is slidably connected to the limit hole provided in the limit plate (13), and the two ends of the lower surface of the movable mold plate (8) are symmetrically connected to the positioning column (6), and the upper surface of the fixed mold plate (3) is provided with a positioning groove corresponding to the position of the relative positioning column (6).

2. A mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: A plurality of exhaust grooves (14) are provided at both ends of the upper surface of the movable mold plate (8) in parallel and at equal intervals, the exhaust grooves (14) are cylindrical in structure, and the number and positions of the exhaust grooves (14) provided on the front mold core (7) and the movable mold plate (8) correspond to each other in number and position, and the cross section of the movable mold plate (8) is a [-shaped structure.

3. A mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: The front mold core (7) is fixedly connected to a groove formed on the lower surface of the movable mold plate (8), and a limit plate (13) is fixedly connected to the exhaust groove (14) formed on the front mold core (7), and the limit plate (13) is generally in an outer circular and inner square structure, and a plurality of through holes are formed on the surface of the limit plate (13) at equal intervals along the circumferential direction.

4. A mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: The movable column (11) has a cylindrical structure, the dimensions of the movable column (11) and the exhaust groove (14) are matched, and a plurality of groups of through holes are provided at equal intervals in the circumferential direction in the movable column (11), the through holes having a cylindrical structure, and the through holes of the movable column (11) and the through holes of the limiting plate (13) are staggered in distribution.

5. The mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: The limiting rod (12) has a T-shaped structure, the horizontal cross section of the limiting rod (12) has a square structure, the sizes of the inner cavities of the limiting rod (12) and the limiting plate (13) are compatible, and the axial cross section formed by the limiting rod (12) and the movable column (11) combined together has an A-shaped structure.

6. The mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: The four groups of positioning columns (6) fixedly connected at the four corners of the lower surface of the movable template (8) are all cylindrical structures, and the lower ends of the positioning columns (6) are all truncated cone structures. The sizes of the positioning columns (6) and the positioning grooves are matched. At the same time, the mounting plate fixedly connected to the middle part of the upper surface of the movable template (8) is in the shape of a [.

7. The mold capable of reducing the step difference between the front and rear mold cores according to claim 1, characterized in that: The positioning groove formed on the upper surface of the fixed template (3) is in the shape of a cylinder as a whole, the upper opening of the positioning groove is in the shape of a truncated cone, and the positioning rod (5) fixedly connected to the bottom of the positioning groove is in the shape of a cylinder, and a positioning hole is formed on the lower surface of the positioning rod (6) corresponding to the position of the positioning rod (5).

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