Injection mold capable of rapidly filling cavity

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold capable of quickly filling a cavity. The injection mold capable of rapidly filling the cavity comprises an upper mold and a lower mold, the upper mold comprises a stripper plate, an upper mold plate and an upper mold core plate, and the stripper plate and the upper mold core plate are arranged on the upper mold plate; a sprue is arranged on the water gap plate; a plurality of exhaust gaps which are radially arranged towards the periphery by taking the sprue as the center are formed in the periphery of the upper mold core; the lower die comprises a lower die base, a lower die plate and a lower die core plate, the lower die plate is arranged on the lower die base, and the lower die core plate is arranged on the lower die plate. A runner is arranged in a cavity of the lower mold core and is connected with the sprue; an ejector pin is arranged in the runner; and inserts arranged on the periphery of the cavity are obliquely closed in the cavity. And the rubber spring arranged on the lower template can reduce the mold closing noise. The exhaust gaps are radially arranged around the sprue, so that gas in the cavity can be quickly exhausted around the sprue, the cavity can be quickly filled with injection molding materials, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold capable of quickly filling a cavity. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and complex-shaped products and other molding processing fields. When producing injection molds, you may encounter the situation of producing thin-walled parts. Thin-walled parts have high production requirements. During injection molding, the injection plastic needs to fill the entire cavity evenly and quickly. When the plastic melt is injected into the injection mold cavity, if the original gas and steam in the cavity cannot be discharged, pores will be formed on the product, and the seams and surface contours will be unclear. The cavity cannot be completely filled. At the same time, the high temperature generated by the compressed gas will burn the part and cause scorch marks. The back pressure generated by the compressed gas in the injection cavity will reduce the filling speed (the injection plastic cannot quickly fill the cavity), which may affect the injection cycle and product quality. Therefore, the exhaust problem must be considered when designing the injection mold.

[0003] For example, the thin-walled part injection mold disclosed in Chinese patent application number: CN201922300577.5 specifically discloses that "a glue injection channel connected to the first injection molding groove is provided in the mother mold insert, and the mother mold insert is assembled from a number of independent mother mold insert blocks, and a first exhaust groove connected to the first injection molding groove and a first air guide groove connecting the first exhaust groove to the outside are provided on the side wall of each mother mold insert block." The exhaust grooves are arranged side by side, so after the injection plastic enters the glue injection channel from the nozzle, the distance between the exhaust grooves increases one by one, so the exhaust efficiency is not high, and there is a hidden danger to product quality. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art, and its main purpose is to provide an injection mold that can quickly fill the cavity, has high exhaust efficiency, and is conducive to ensuring product quality, thereby overcoming the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides an injection mold for rapidly filling a mold cavity, comprising an upper mold and a lower mold; the upper mold comprises a sprue plate, an upper mold plate, and an upper mold core plate, wherein the sprue plate is arranged on the upper mold plate; the upper mold core plate is arranged on the upper mold plate; a nozzle is arranged on the sprue plate, and a material injection port of the nozzle is exposed at the upper mold core of the upper mold core plate; a plurality of exhaust gaps are arranged around the upper mold core, and the exhaust gaps are radially arranged around the nozzle;

[0007] The lower die comprises a lower die seat, a lower die plate, and a lower die core plate, wherein the lower die plate is arranged on the lower die seat, and the lower die core plate is arranged on the lower die plate; a cavity is arranged on the lower die core of the lower die core plate, a flow channel is arranged in the cavity and connected to the nozzle, and an ejector is arranged in the flow channel; inserts are arranged around the cavity, and the inserts can move obliquely downward to close in the cavity;

[0008] A rubber spring is arranged in the first mounting hole of the lower template, and the upper template can be pressed on the rubber spring.

[0009] Preferably, a first guide column is provided at a corner position of the lower template, a side wall of the first guide column is provided with texture, and lubricating oil is adhered to the texture; the upper template is provided with a first guide column sleeve, and the first guide column can be inserted into the first guide column sleeve.

[0010] Preferably, a positioning column is provided at the corner position of the lower mold plate, and the positioning column can be inserted into the positioning hole at the corner position of the upper mold plate.

[0011] Preferably, a first ejector plate and a second ejector plate are provided on the lower die base, the second ejector plate is provided on the first ejector plate, the lower end of the ejector is provided on the first ejector plate, and the ejector rod of the insert is obliquely provided on the first ejector plate.

[0012] Preferably, the lower end of the reset rod is arranged on the first ejector plate; the upper end of the reset rod passes through the lower template and can be reset by being squeezed by the upper template.

[0013] Preferably, a rotating shaft is provided at the lower end of the ejector rod, and a mounting groove is provided on the bottom surface of the first ejector plate, and the rotating shaft rotates in the mounting groove.

[0014] Preferably, four inserts are arranged at the long side of the lower die core; and one insert is arranged at the short side of the lower die core.

[0015] Preferably, the flow channel includes a main flow channel and a plurality of branch flow channels, and the main flow channel and the branch flow channels are arranged in a Y-shape or a W-shape.

[0016] Preferably, the main flow channel, the branch flow channel, and the corners of the cavity are all provided with the ejector pins.

[0017] Preferably, a main cooling pipe and at least two branch cooling pipes are provided inside the upper mold core plate and the lower mold core plate, and the branch cooling pipes are connected to the main cooling pipe.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the injection port of the nozzle is exposed at the upper mold core of the upper mold core plate; a plurality of exhaust gaps are arranged around the upper mold core, and the exhaust gaps are arranged radially around the nozzle. After the upper mold and the lower mold are closed, when the injection plastic is injected into the flow channel from the nozzle, since the exhaust gaps are arranged radially around the nozzle, the gas in the cavity will be discharged around the nozzle. This exhaust method is not only efficient, but also has uniform exhaust. The injection plastic can fill the cavity in a shorter time, which is more conducive to product quality assurance.

[0019] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0021] Figure 2 It is a schematic front view of an upper mold of an embodiment of the utility model.

[0022] Figure 3 It is a front view schematic diagram of the lower mold of an embodiment of the utility model.

[0023] Figure 4 It is an embodiment of the utility model Figure 3 Schematic diagram of AA.

[0024] Figure 5 It is an embodiment of the utility model Figure 3 Schematic diagram of the medium BB.

[0025] Figure 6 It is a schematic structural diagram of the lower mold part of an embodiment of the utility model.

[0026] Figure 7 It is a schematic diagram of the connection between the main flow channel and the branch flow channels of an embodiment of the utility model.

[0027] Description of the accompanying drawings:

[0028] 10. Upper mold; 11. Inlet plate; 12. Nozzle; 13. Upper mold plate; 14. Upper mold core plate; 15. Positioning hole; 16. Upper mold core; 17. Exhaust gap; 18. First guide pin sleeve; 20. Lower mold; 21. Lower mold base; 22. Lower mold plate; 24. Positioning pin; 25. Rubber spring; 210. Lower mold core plate; 211. Lower mold core; 212. Main flow channel; 213. Branch flow channel; 214. Cavity; 215. Main cooling channel; 216. Branch cooling channel; 220. First ejector plate; 221. Second ejector plate; 223. Ejector; 224. Insert; 225. Ejector pin; 226. Rotating shaft; 227. Reset rod; 228. First guide pin; 229. Texture. DETAILED DESCRIPTION

[0029] Please refer to Figures 1 to 7 As shown, it shows the specific structure of the preferred embodiment of the utility model, which is an injection mold that quickly fills the cavity.

[0030] Among them, a plurality of exhaust gaps 17 are arranged around the upper mold core 16, and the exhaust gaps 17 are radially arranged around the nozzle 12, which is beneficial to the efficient and rapid exhaust of the gas in the cavity 214 after the upper mold 10 and the lower mold 20 are closed, and is more conducive to quality assurance.

[0031] The present application provides an injection mold for quickly filling a mold cavity, comprising an upper mold 10 and a lower mold 20; the upper mold 10 comprises a sprue plate 11, an upper mold plate 13, and an upper mold core plate 14, wherein the sprue plate 11 is arranged on the upper mold plate 13; the upper mold core plate 14 is arranged on the upper mold plate 13; a nozzle 12 is arranged on the sprue plate 11, and the injection port of the nozzle 12 is exposed at the upper mold core 16 of the upper mold core plate 14; a plurality of exhaust gaps 17 are arranged around the upper mold core 16, and the exhaust gaps 17 are radially arranged around the nozzle 12; the lower mold 20 comprises a lower mold base 21 , a lower mold plate 22, and a lower mold core plate 210, wherein the lower mold plate 22 is arranged on the lower mold seat 21, and the lower mold core plate 210 is arranged on the lower mold plate 22; a cavity 214 is arranged on the lower mold core 211 of the lower mold core plate 210, a flow channel is arranged in the cavity 214 and connected to the nozzle 12, and an ejector 223 is arranged in the flow channel; an insert 224 is arranged around the cavity 214, and the insert 224 can move obliquely downward and close in the cavity 214; a rubber spring 25 is arranged in the first mounting hole of the lower mold plate 22, and the upper mold plate 13 can be pressed on the rubber spring 25. The upper mold 10 and the lower mold 20 are arranged in an injection molding machine. Radial means that the middle point radiates to the surroundings like fireworks, such as the wheels of a bicycle. The upper mold 10 and the lower mold 20 are closed together, and the insert 224 moves obliquely downward and closes in the cavity 214; then the injection plastic is injected from the nozzle 12 and then reaches the flow channel. At this time, since the exhaust gaps 17 set around the upper mold core 16 are arranged radially around the nozzle 12, when the injection plastic is spread in the cavity 214, the air in the cavity 214 will be discharged around the nozzle 12 as the starting point. This design can evenly and efficiently discharge the air in the cavity 214 in the shortest time, so that the injection plastic can fill the cavity 214 in a shorter time, and the quality is also guaranteed. After the cavity 214 is filled, the upper mold core 16 and the lower mold core 211 are cooled by the main cooling channel 215 and the branch cooling channel 216, so that the product can be quickly formed. After the product is formed, the ejector pins 223 arranged in the flow channels (main flow channels 212, branch flow channels 213) and the ejector pins 223 arranged at the corners of the cavity 214 eject the product in the cavity 214, and the insert 224 moves obliquely upward away from the cavity 214, thereby ejecting the entire product as a whole in the cavity 214. This ejection is highly efficient and can prevent the product from being damaged. The rubber spring 25 of the first mounting hole can reduce the impact force when the upper mold 10 and the lower mold 20 are closed, reduce noise, and reduce mold wear. Among them, the rubber spring 25 can be completely pressed into the first mounting hole by the upper mold plate 13 to ensure the compactness of the mold. The preferred exhaust gap 17 is in the shape of a long strip, and its exhaust is uniform and the noise is low.

[0032] Preferably, the corners of the lower mold plate 22 are provided with first guide posts 228, the side walls of the first guide posts 228 are provided with lines 229, and lubricating oil is adhered to the lines 229; the upper mold plate 13 is provided with first guide post sleeves 18, and the first guide posts 228 can be inserted into the first guide post sleeves 18. The corners of the lower mold core plate 210 are provided with positioning posts 24, and the positioning posts 24 can be inserted into the positioning holes 15 at the corners of the upper mold core plate 14. The lines 229 are adhered with lubricating oil, which can reduce the wear between the first guide posts 228 and the first guide post sleeves 18 and extend the service life of the mold. When the upper mold 10 and the lower mold 20 are molded together, the first guide posts 228 are inserted into the first guide post sleeves 18, and the positioning posts 24 are inserted into the positioning holes 15. Under double positioning, it is beneficial to ensure the mold closing accuracy and ensure the product quality.

[0033] Preferably, the lower die base 21 is provided with a first ejector plate 220 and a second ejector plate 221, the second ejector plate 221 is provided on the first ejector plate 220, the lower end of the ejector 223 is provided on the first ejector plate 220, and the ejector rod 225 of the insert 224 is obliquely provided on the first ejector plate 220. The second ejector plate 221 can push the first ejector plate 220 to move upward. When the first ejector plate 220 and the second ejector plate 221 move upward, the ejector 223 moves upward, and the ejector rod 225 moves obliquely outward while moving upward, at which time the insert 224 releases the product, and the ejector 223 ejects the product. On the contrary, the ejector 223 and the insert 224 are reset to wait for the injection plastic to be refilled.

[0034] Preferably, the lower end of the reset rod 227 is arranged on the first ejector plate 220; the upper end of the reset rod 227 passes through the lower mold plate 22 and can be reset by being squeezed by the upper mold plate 13. When the upper mold 10 and the lower mold 20 are closed, the upper mold plate 13 presses down the reset rod 227, and the reset rod 227 pushes the first ejector plate 220 and the second ejector plate 221 to move downward, so that the insert 224 and the ejector 223 can be automatically reset to facilitate the next step of injecting plastic. This mode of closing and opening the mold is efficient.

[0035] Preferably, a rotating shaft 226 is provided at the lower end of the push rod 225, and a mounting groove is provided on the bottom surface of the first push pin plate 220, and the rotating shaft 226 rotates in the mounting groove. The rotating shaft 226 is provided at the lower end of the push rod 225 so that when the push rod 225 moves up and down, the lower end of the push rod 225 can rotate to prevent the push rod 225 from being damaged.

[0036] Preferably, four inserts 224 are provided at the long side of the lower mold core 211; one insert 224 is provided at the short side of the lower mold core 211. The number of inserts 224 is not unique and can be provided as needed without specific limitation. In this embodiment, five exhaust gaps 17 are provided at the long side of the upper mold core plate 14, and two exhaust gaps 17 are provided at the short side of the upper mold core plate 14.

[0037] Preferably, the flow channel includes a main flow channel 212 and a plurality of branch flow channels 213, and the main flow channel 212 and the branch flow channels 213 are arranged in a Y-shape or a W-shape. The flow channel of this embodiment is arranged in a W-shape. With this design, when the nozzle 12 injects the injection plastic into the cavity 214, the injection plastic can diffuse from the nozzle 12 to the upper and lower positions and the sides at the same time, which is more conducive to allowing the injection plastic to quickly fill the cavity 214.

[0038] Preferably, a main cooling pipe 215 and at least two branch cooling pipes 216 are provided inside the upper mold core plate 14 and the lower mold core plate 210, and the branch cooling pipes are connected to the main cooling pipe 215. The main cooling pipe 215 and the branch cooling pipe 216 are provided at the front and rear positions of the upper mold core plate 14 and the lower mold core plate 210, so that the upper mold core plate 14 and the lower mold core plate 210 can be quickly cooled to accelerate product molding.

[0039] In summary, the design focus of the utility model is that the exhaust gaps 17 arranged around the upper mold core 16 are arranged radially around the nozzle 12. Therefore, after the upper mold 10 and the lower mold 20 are closed, after the injection plastic is injected into the flow channel from the nozzle 12, the gas in the cavity 214 will be discharged around the nozzle 12, which not only improves the exhaust efficiency, but also makes the exhaust uniform. The injection plastic can fill the cavity 214 in a shorter time, which is more conducive to product quality assurance.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An injection mold for rapidly filling a cavity, characterized in that: The upper mold comprises an upper mold and a lower mold; the upper mold comprises a nozzle plate, an upper mold plate, and an upper mold core plate, wherein the nozzle plate is arranged on the upper mold plate; the upper mold core plate is arranged on the upper mold plate; a nozzle is arranged on the nozzle plate, and a material injection port of the nozzle is exposed at the upper mold core of the upper mold core plate; a plurality of exhaust gaps are arranged around the upper mold core, and the exhaust gaps are radially arranged around the nozzle; The lower die comprises a lower die seat, a lower die plate, and a lower die core plate, wherein the lower die plate is arranged on the lower die seat, and the lower die core plate is arranged on the lower die plate; a cavity is arranged on the lower die core of the lower die core plate, a flow channel is arranged in the cavity and connected to the nozzle, and an ejector is arranged in the flow channel; inserts are arranged around the cavity, and the inserts can move obliquely downward to close in the cavity; A rubber spring is arranged in the first mounting hole of the lower template, and the upper template can be pressed on the rubber spring.

2. The injection mold for rapidly filling the cavity according to claim 1, characterized in that: The corners of the lower template are provided with first guide posts, the side walls of which are provided with textures, and lubricating oil is adhered to the textures; the upper template is provided with a first guide post sleeve, and the first guide post can be inserted into the first guide post sleeve.

3. An injection mold for rapidly filling a mold cavity according to claim 1 or 2, characterized in that: Positioning posts are provided at the corners of the lower mold plate, and the positioning posts can be inserted into positioning holes at the corners of the upper mold plate.

4. The injection mold for rapidly filling the cavity according to claim 1, characterized in that: The lower die base is provided with a first ejector plate and a second ejector plate, the second ejector plate is arranged on the first ejector plate, the lower end of the ejector is arranged on the first ejector plate, and the ejector rod of the insert is arranged obliquely on the first ejector plate.

5. The injection mold for rapidly filling the cavity according to claim 4, characterized in that: The lower end of the reset rod is arranged on the first ejector plate; the upper end of the reset rod passes through the lower mold plate and can be reset by being squeezed by the upper mold plate.

6. An injection mold for rapidly filling a cavity according to claim 4 or 5, characterized in that: The lower end of the ejector rod is provided with a rotating shaft, and the bottom surface of the first ejector plate is provided with a mounting groove, and the rotating shaft rotates in the mounting groove.

7. The injection mold for rapidly filling a cavity according to claim 1, characterized in that: Four inserts are arranged at the long side of the lower die core; and one insert is arranged at the short side of the lower die core.

8. The injection mold for rapidly filling a cavity according to claim 1, characterized in that: The flow channel includes a main flow channel and a plurality of branch flow channels, and the main flow channel and the branch flow channels are arranged in a Y shape or a W shape.

9. The rapid cavity filling injection mold according to claim 1, characterized in that: The main flow channel, the branch flow channel, and the corners of the cavity are all provided with ejectors.

10. The injection mold for rapidly filling a cavity according to claim 1, characterized in that: A main cooling pipeline and at least two branch cooling pipelines are arranged inside the upper mold core plate and the lower mold core plate, and the branch cooling pipelines are connected to the main cooling pipeline.

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