Cabinet frame injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a cabinet frame injection mold. The cabinet frame injection mold comprises an upper mold and a lower mold, an upper mold plate of the upper mold is provided with a material injection port and an upper mold core, the lower mold comprises a lower mold plate and a lower mold core, and the lower mold core is arranged on the lower mold plate; the shunting seat is arranged on the lower die core; the lower mold core is provided with at least two bent main runners which are communicated with the corresponding shunting ports; the main runner is communicated with a bent first sub-runner and a bent second sub-runner, and the first sub-runner and the second sub-runner are connected with a mold core on the lower mold core after being bent. The flowing sectional areas of the first sub-runner and the second sub-runner are gradually reduced from the starting end to the tail end, so that the speed of injecting the first sub-runner and the second sub-runner into the cavity from the starting end to the tail end is gradually increased, injection molding materials can be injected into the cavity at multiple points at the same time, and the quality problems of pores and breakage of products are avoided; and quality guarantee is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a cabinet frame. Background Art

[0002] Some cabinets in the computer room are made of plastic. Plastic cabinets are usually formed by assembling a frame (such as a bottom frame and a top frame), cross columns, a column group, and plates. The bottom frame and the top frame are usually square structures. When injecting plastic, it is necessary to control the time for the injected plastic to enter the cavity. However, since some of the runners are straight or approximately straight, some of the injected plastic will enter the cavity at a relatively fast speed. This design makes the product prone to quality problems such as porosity and fracture, which is not conducive to quality assurance.

[0003] For example, an injection mold for processing a plastic frame disclosed in Chinese Patent Application No.: CN202223429325.0. Its injection runner is straight. When injecting the plastic frame, the product is prone to quality problems such as porosity and fracture, which is not conducive to quality assurance.

[0004] Another example is the high-clean thin-wall frame injection mold disclosed in Chinese Patent Application No.: CN201921199280.8. The main runner and the sub-runners are both straight, and the above problems also exist. Summary of the Utility Model

[0005] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide an injection mold for a cabinet frame, which slows down the flow rate of the injected plastic and allows the injected plastic to enter the cavity 111 from multiple positions simultaneously, which is conducive to quality assurance, thus overcoming the deficiencies of the existing technology.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] The present application provides a cabinet frame injection mold, including an upper mold 10 and a lower mold 20, wherein an injection port 11 and an upper mold core 110 are arranged on an upper mold plate 14 of the upper mold 10, and the lower mold 20 includes a lower mold plate 21 and a lower mold core 210, wherein the lower mold core 210 is arranged on the lower mold plate 21; a diverter seat 12 is arranged on the lower mold core 210; the diverter seat 12 is provided with at least two diverter ports 13, and the lower mold core 210 is provided with at least two curved main flow channels 217, wherein the main flow channels 217 are connected to the diverter ports 13; each main flow channel 217 is connected to a first diverter port 217 corresponding to the first diverter port 217; 18 and a second branch channel 219, the first branch channel 218 is bent to the left to connect the core on the lower mold core 210, and the second branch channel 219 is bent to the right to connect the core on the lower mold core 210; a plurality of exhaust grooves 23 are arranged on the outer side of the core; the flow cross-sectional area of ​​the first branch channel 218 and the second branch channel 219 gradually decreases from the beginning to the end; the first exhaust block 15 is arranged on the upper mold plate 14, and the second exhaust block 22 is arranged on the lower mold plate 21; the first exhaust block 15 and the second exhaust block 22 are closed to form an exhaust channel; part of the exhaust grooves 23 are connected to the exhaust channel.

[0008] Preferably, a plurality of first connecting ports 215 are provided at the connection position between the first branch channel 218 and the core, and a plurality of second connecting ports 216 are provided at the connection position between the second branch channel 219 and the core; the bottom walls of the first connecting ports 215 and the second connecting ports 216 are arc-shaped.

[0009] Preferably, ejector pins 24 are disposed at the main flow channel 217 , the first branch flow channel 218 , the second branch flow channel 219 , the first connecting port 215 , the second connecting port 216 , the second exhaust block 22 , and the lower mold core 210 .

[0010] Preferably, a receiving groove is provided at the end of the first branch channel 218 and the second branch channel 219 .

[0011] Preferably, the upper template 14 is provided with a first guide post 16 , and the first guide post 16 is provided with a pattern with lubricating oil; the lower template 21 is provided with a first guide post hole 28 , and the first guide post 16 is inserted into the first guide post hole 28 .

[0012] Preferably, the upper mold core 110 is penetrated by a plurality of first cooling pipes 17 , and the lower mold core 210 is penetrated by a plurality of second cooling pipes 29 .

[0013] Preferably, the ejector pin 24 is disposed on an ejector plate 25 ; the ejector plate 25 is provided with a reset rod 27 which can movably pass through the lower template 21 ; and the ejector plate 25 is disposed on an ejector plate 26 .

[0014] Preferably, positioning holes 220 are formed between the corners of the upper die core 110 and the upper template 14, and positioning posts 221 are arranged at the corners of the lower die core 210. The positioning posts 221 are inserted into the positioning holes 220.

[0015] Preferably, the flow distribution block 12 is provided with two flow distribution ports 13, and the included angle between the two flow distribution ports 13 is between 45° and 60°; the first flow channel 218 and the second flow channel 219 are arranged symmetrically left and right.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, the chassis frame is a square frame, having a left frame, a right frame, a front frame, and a rear frame. Since the curved main flow channel 217 communicates with the curved first flow channel 218 and the second flow channel 219, and at the same time, the flow cross-sectional areas of the first flow channel 218 and the second flow channel 219 gradually decrease from the starting end to the ending end. Therefore, when the injection molding material is injected into the main flow channel 217, the curved main flow channel 217 will slow down the flow rate of the injection molding material. The flow cross-sectional areas of the first flow channel 218 and the second flow channel 219 gradually decrease from the starting end to the ending end, and the injection speeds of the first flow channel 218 and the second flow channel 219 into the cavity 111 gradually increase, that is, the injection speed at the ending ends of the first flow channel 218 and the second flow channel 219 is the fastest, and the injection speed at the starting ends is the slowest. In this way, the injection molding material can be injected into the cavity 111 simultaneously, avoiding quality problems such as porosity and fracture of the product, which is beneficial to quality assurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the mold closing of the embodiment of the present invention.

[0018] Figure 2 is a schematic diagram of the mold opening of the embodiment of the present invention.

[0019] Figure 3 is a top view schematic diagram of the lower mold 20 of the embodiment of the present invention.

[0020] Figure 4 is a top view schematic diagram of the upper mold 10 of the embodiment of the present invention.

[0021] DESCRIPTION OF THE REFERENCE NUMERALS:

[0022] 10. Upper mold; 11. Injection port; 12. Manifold block; 13. Diverging port; 14. Upper template; 15. First exhaust block; 16. First guide pillar; 17. First cooling pipe; 110. Upper mold core; 111. Cavity; 20. Lower mold; 21. Lower template; 22. Second exhaust block; 23. Exhaust groove; 24. Ejector pin; 25. Ejector plate; 26. Top plate; 27. Return rod; 28. First guide pillar hole; 29. Second cooling pipe; 210. Lower mold core; 211. Left core; 212. Rear core; 213. Right core; 214. Front core; 215. First communication port; 216. Second communication port; 217. Main runner; 218. First sub-runner; 219. Second sub-runner; 220. Positioning hole; 221. Positioning post; 30. Product. Detailed implementation manner

[0023] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific implementation manner, structure, features and their effects of the present utility model as follows.

[0024] Please refer to Figures 1 to 4 as shown, which shows the specific structure of the preferred embodiment of the present utility model, and is an injection mold for a cabinet frame.

[0025] Among them, the main runner 217, the first sub-runner 218 and the second sub-runner 219 are all curved, and at the same time, the flow cross-sectional areas of the first sub-runner 218 and the second sub-runner 219 gradually decrease from the starting end to the ending end. The main runner 217 slows down the flow rate of the injection plastic, and at the same time, the flow cross-sectional areas of the first sub-runner 218 and the second sub-runner 219 gradually decrease from the starting end to the ending end, so that the injection speed at the ending ends of the first sub-runner 218 and the second sub-runner 219 is the fastest, and the injection speed at the starting ends is the slowest, enabling the injection plastic to be injected into the cavity 111 simultaneously, avoiding quality problems such as porosity and fracture of the product 30, and being conducive to quality assurance.

[0026] The present application provides an injection mold for a cabinet frame, which includes an upper mold 10 and a lower mold 20. A material injection port 11 and an upper mold core 110 are provided on the upper template 14 of the upper mold 10. The lower mold 20 includes a lower template 21 and a lower mold core 210, and the lower mold core 210 is arranged on the lower template 21; a flow distribution seat 12 is arranged on the lower mold core 210; the flow distribution seat 12 is provided with at least two flow distribution ports 13, and the lower mold core 210 is provided with at least two curved main flow channels 217, and the main flow channels 217 are communicated with the flow distribution ports 13; each main flow channel 217 corresponds to a first sub-flow channel 218 and a second sub-flow channel 219 in communication. The first sub-flow channel 218 bends to the left to connect the core on the lower mold core 210, and the second sub-flow channel 219 bends to the right to connect the core on the lower mold core 210; a plurality of exhaust grooves 23 are arranged on the outer side of the core; the flow cross-sectional areas of the first sub-flow channel 218 and the second sub-flow channel 219 gradually decrease from the starting end to the ending end; a first exhaust block 15 is arranged on the upper template 14, and a second exhaust block 22 is arranged on the lower template 21; the first exhaust block 15 and the second exhaust block 22 are closed to form an exhaust channel; part of the exhaust grooves 23 are communicated with the exhaust channel. The chassis frame in this embodiment is rectangular, having a left frame, a right frame, a front frame, and a rear frame; the core has a left core 211, a right core 213, a front core 214, and a rear core 212. After the upper mold 10 and the lower mold 20 are clamped, the injection plastic is injected from the material injection port 11. The air inside the mold is discharged through the exhaust grooves 23 and the exhaust channel. The upper mold core 110 has a cavity 111, and after the cavity 111 is closed with the core, a complete molding cavity 111 for forming the chassis frame is formed. The size of the main flow channel 217 is larger than the sizes of the first sub-flow channel 218 and the second sub-flow channel 219, and can provide sufficient injection plastic for the first sub-flow channel 218 and the second sub-flow channel 219. The curved main flow channel 217 can slow down the flow rate of the injection plastic, which is more conducive to the mold discharging air. The first sub-flow channel 218 and the second sub-flow channel 219 are also curved, which is also conducive to slowing down the flow rate of the injection plastic. At the same time, the flow cross-sectional areas of the first sub-flow channel 218 and the second sub-flow channel 219 gradually decrease from the starting end to the ending end, so that the injection speeds of the first sub-flow channel 218 and the second sub-flow channel 219 into the cavity 111 from the starting end to the ending end are gradually increasing, that is, the injection speed at the ending end of the first sub-flow channel 218 and the second sub-flow channel 219 is the fastest, and the injection speed at the starting end is the slowest, and the injection speed gradually increases. In this way, the injection plastic can be injected into the cavity 111 at the same time, avoiding quality problems such as pores and fractures in the product 30, which is conducive to quality assurance. The meaning here is that for the injection plastic of the same volume, as the flow cross-sectional areas of the first sub-flow channel 218 and the second sub-flow channel 219 become smaller, the injection speeds of the first sub-flow channel 218 and the second sub-flow channel 219 continuously increase from the starting end to the ending end, so that the injection plastic can be injected into the cavity 111 at the same time, which is conducive to quality assurance.

[0027] Please refer to Figure 3As shown in the figure, the flow dividing seat 12 of this embodiment is provided with two flow dividing ports 13, and each flow dividing port 13 is connected to a main runner 217. The first runner 218 at the rear bends towards the left core 211 and the rear core 212, and several first communication ports 215 of the first runner 218 at the rear are connected to the rear core 212 and the left core 211. The second runner 219 at the rear bends towards the right core 213 and the rear core 212, and several second communication ports 216 of the second runner 219 at the rear are connected to the right core 213 and the rear core 212. That is, the first runner 218 and the second runner 219 at the rear are used to provide injection molding materials for the rear half of the chassis frame. At the same time, the arrangement of the main runners 217, the first runners 218, and the second runners 219 provided at the front is symmetrical to that of the main runners 217, the first runners 218, and the second runners 219 at the rear, which will not be elaborated here. That is, the first runner 218 and the second runner 219 at the front provide injection molding materials for the front half of the chassis frame. Therefore, with the cooperation of the front and rear groups of curved main runners 217, first runners 218, and second runners 219, the injection molding materials can be injected into the cavity 111 at the same time, avoiding quality problems such as pores and fractures in the product 30, which is beneficial to quality assurance.

[0028] Preferably, several first communication ports 215 are provided at the connection position between the first runner 218 and the core, and several second communication ports 216 are provided at the connection position between the second runner 219 and the core; the bottom walls of the first communication ports 215 and the second communication ports 216 are arc-shaped. The bottom walls of the first communication ports 215 and the second communication ports 216 being arc-shaped is beneficial for the injection molding materials in the first runner 218 and the second runner 219 to be injected into the cavity 111 at a relatively gentle speed, rather than being directly injected into the cavity 111. This design is beneficial for avoiding air bubbles, maintaining the continuity of the product 30, and preventing the product 30 from breaking.

[0029] Preferably, ejector pins 24 are provided at the positions of the main runner 217, the first runner 218, the second runner 219, the first communication port 215, the second communication port 216, the second exhaust block 22, and the lower die core 210. After the product 30 is injection molded in the mold, the ejector pins 24 eject the product 30 and waste materials simultaneously at the positions of the main runner 217, the first runner 218, the second runner 219, the first communication port 215, the second communication port 216, the second exhaust block 22, and the lower die core 210, which improves the demolding efficiency and avoids damaging the product 30.

[0030] Preferably, receiving grooves are provided at the ends of the first runner 218 and the second runner 219. During injection molding, the injection molding materials will first fill the receiving grooves, and then the injection molding materials will be injected into the cavity 111 from the first runner 218 and the second runner 219. This design can avoid the generation of air bubbles.

[0031] Preferably, the upper mold plate 14 is provided with a first guide post 16, and the first guide post 16 is provided with a pattern with lubricating oil; the lower mold plate 21 is provided with a first guide post hole 28, and the first guide post 16 is inserted into the first guide post hole 28. Positioning holes are formed between the corners of the upper mold core 110 and the upper mold plate 14, and the corners of the lower mold core 210 are provided with positioning posts, and the positioning posts are inserted into the positioning holes. When the mold is closed, the first guide post 16 is inserted into the first guide post hole 28, and the positioning post is inserted into the positioning hole. This design is conducive to improving the accuracy of mold closing.

[0032] Preferably, the upper mold core 110 is penetrated by a plurality of first cooling pipes 17, and the lower mold core 210 is penetrated by a plurality of second cooling pipes 29. The first cooling pipe 17 and the second cooling pipe 29 are filled with cooling medium, and after the injection molding is completed, the first cooling pipe 17 and the second cooling pipe 29 are passed with cooling medium, which is conducive to accelerating the molding of the product 30.

[0033] Preferably, the ejector pin 24 is arranged on an ejector plate 25; the ejector plate 25 is provided with a reset rod 27 and can movably pass through the lower mold plate 21; the ejector plate 25 is arranged on the top plate 26. The injection molding machine drives the top plate 26 to move upward, so that the ejector pin 24 ejects the product 30. When the mold is closed, the upper mold plate 14 presses the reset rod 27, and the reset rod 27 drives the ejector plate 25 and the top plate 26 to move downward, and the ejector pin 24 is reset. This design is conducive to further ensuring the reset of the ejector pin 24.

[0034] Preferably, the diverter seat 12 is provided with two diverter ports 13, and the angle between the two diverter ports 13 is between 45° and 60°; the first diverter channel 218 and the second diverter channel 219 are arranged symmetrically. The angle between the two diverter ports 13 of this embodiment can be any angle such as 45°, 50°, 60°, etc.

[0035] In summary, the design focus of the utility model is that the main channel 217, the first branch channel 218, and the second branch channel 219 are all curved, and at the same time, the flow cross-sectional area of ​​the first branch channel 218 and the second branch channel 219 gradually decreases from the beginning to the end, and the speed at which the first branch channel 218 and the second branch channel 219 are injected into the cavity 111 gradually increases, so that the injection plastics of various parts can be injected into the cavity 111 at the same time, avoiding the quality problems of pores and fractures in the product 30, which is beneficial to quality assurance.

[0036] The above are only the preferred embodiments of the present utility model, and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A cabinet frame injection mold, characterized in that: It comprises an upper mold and a lower mold, wherein the upper mold plate of the upper mold is provided with an injection port and an upper mold core. The lower mold comprises a lower mold plate and a lower mold core, the lower mold core is arranged on the lower mold plate; the manifold seat is arranged on the lower mold core; the manifold seat is provided with at least two manifold openings, the lower mold core is provided with at least two curved main flow channels, the main flow channels are connected with the manifold openings; each main flow channel is connected to a corresponding first manifold and a second manifold, the first manifold is bent to the left to connect to the core on the lower mold core, and the second manifold is bent to the right to connect to the core on the lower mold core; a plurality of exhaust grooves are arranged on the outer side of the core; the flow cross-sectional areas of the first manifold and the second manifold are gradually reduced from the beginning to the end; The first exhaust block is arranged on the upper template, and the second exhaust block is arranged on the lower template; the first exhaust block and the second exhaust block are closed to form an exhaust channel; and part of the exhaust grooves are connected to the exhaust channel.

2. The cabinet frame injection mold according to claim 1, characterized in that: A plurality of first communication ports are provided at the connection position between the first branch channel and the core, and a plurality of second communication ports are provided at the connection position between the second branch channel and the core; the bottom walls of the first communication ports and the second communication ports are arc-shaped.

3. The cabinet frame injection mold according to claim 2, characterized in that: The main flow channel, the first branch flow channel, the second branch flow channel, the first connecting port, the second connecting port, the second exhaust block, and the lower mold core are all provided with ejector pins.

4. The cabinet frame injection mold according to claim 1, characterized in that: The ends of the first branch channel and the second branch channel are provided with accommodating grooves.

5. The cabinet frame injection mold according to claim 1, characterized in that: The upper template is provided with a first guide post, and the first guide post is provided with a pattern with lubricating oil; the lower template is provided with a first guide post hole, and the first guide post is inserted into the first guide post hole.

6. The cabinet frame injection mold according to claim 1, characterized in that: The upper mold core is penetrated by a plurality of first cooling pipes, and the lower mold core is penetrated by a plurality of second cooling pipes.

7. The cabinet frame injection mold according to claim 3, characterized in that: The ejector pin is arranged on an ejector plate; the ejector plate is provided with a reset rod which can movably pass through the lower template; the ejector plate is arranged on the ejector plate.

8. The cabinet frame injection mold according to claim 1, characterized in that: Positioning holes are formed between the corners of the upper mold core and the upper mold plate, and positioning columns are arranged at the corners of the lower mold core, and the positioning columns are inserted into the positioning holes.

9. The cabinet frame injection mold according to claim 1, characterized in that: The diverter seat is provided with two diverter ports, and the angle between the two diverter ports is between 45° and 60°; the first diverter channel and the second diverter channel are arranged symmetrically.

Images