Hot runner structure with side glue discharge

Abstract

The utility model relates to a hot runner structure of side glue outlet, including hot nozzle and mould core, hot nozzle includes lower runner main part, horizontal glue outlet spare and gland, the lower runner main part is established below the gland, and the lower runner main part and the gland are connected through the screw thread connecting piece in the up and down direction and will horizontal glue outlet spare clamping between two, horizontal glue outlet spare includes the glue injection nozzle that protrudes out lower runner main part in horizontal direction, mould core is equipped with the forming cavity, is equipped with the recess for the glue injection nozzle to extend in the outer end of forming cavity horizontal direction, and sets up the inclined guide surface on lower runner main part and horizontal glue outlet spare, need not additional other heat sealing parts to set up at the glue injection nozzle, only rely on the abutment of hot nozzle and mould core can form annular heat seal in the axial direction of glue injection nozzle, prevent the heat loss at the glue injection nozzle, prevent the melt plastic colloid from condensing in advance at the glue injection nozzle because of temperature too low.

Description

Technical Field

[0001] This utility model relates to the field of hot runner technology for injection molds. Background Technology

[0002] The working principle of the hot runner structure in injection molds is to first heat the molten plastic to a suitable temperature through the heating elements of the hot runner system, and then inject it into the mold cavity through a hot nozzle to achieve product injection molding. Currently, conventional hot nozzles can dispense material vertically downwards or horizontally from the side. Among them, hot nozzles that dispense material from the side have a longer flow path, making it easier for the molten plastic to be too cold before entering the mold cavity. Therefore, existing technology usually adds an additional heat-sealing component near the injection nozzle to prevent heat loss at the injection nozzle. However, all current heat-sealing components suffer from rapid aging and require frequent replacement. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a side-discharge hot runner structure that does not require additional heat-sealing components.

[0004] This utility model is achieved using the following technical solution: This utility model proposes a hot runner structure with side-discharge, including a hot nozzle and a mold core. The hot nozzle includes a lower runner body, a transverse discharge part, and a pressure cap. The pressure cap is located below the lower runner body. The lower runner body and the pressure cap are connected in the vertical direction by a threaded connector, and the transverse discharge part is clamped between the two. The transverse discharge part includes a dispensing nozzle that protrudes from the lower runner body in the horizontal direction. The mold core has a molding cavity, and a groove for the dispensing nozzle to extend into is provided at the outer end of the molding cavity in the horizontal direction. A first annular step is provided at the groove opening, and a second annular step is provided on the outer periphery of the dispensing nozzle. The lower end of the main body of the lower channel is provided with an inclined first guide surface, and the transverse dispensing part is provided with an inclined second guide surface that slides and fits against the first guide surface. The pressure cap abuts against the transverse dispensing part upward, so that the transverse dispensing part can move outward in the horizontal direction of the main body of the lower channel under the guidance of the first guide surface and the second guide surface, thereby causing the first annular step and the second annular step to abut and seal in the horizontal direction.

[0005] Preferably, a first positioning groove is provided at the lower end of the lower channel body, and a second positioning groove is provided at the upper end of the pressure cap. The first positioning groove, the second positioning groove and the first guide surface form an installation positioning space for the transverse dispensing component.

[0006] Preferably, the lower flow channel body is provided with an inclined first flow channel, and the transverse dispensing part is provided with an inclined second flow channel that connects with the first flow channel. The flow path from the beginning of the first flow channel to the end of the second flow channel gradually changes from vertical to horizontal.

[0007] Preferably, the first diversion channel is provided with a first docking end that connects with the second diversion channel, and the second diversion channel is provided with a second docking end that connects with the first diversion channel. Both the first docking end and the second docking end are hemispherical groove structures.

[0008] Preferably, the threaded connector is a screw, which passes through the gland and is screwed to the lower flow channel body, and the threaded connector presses upward against the gland.

[0009] The present invention has the following advantages: The present invention does not require additional heat-sealing parts to be set at the dispensing nozzle. The annular heat seal can be formed in the axial direction of the dispensing nozzle by the contact of the first annular step and the second annular step alone, which prevents heat loss at the dispensing nozzle and prevents the molten plastic from solidifying prematurely at the dispensing nozzle due to low temperature. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a side-discharge hot runner structure in one embodiment; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is an exploded view of the lower channel body, the transverse dispensing part, the pressure cap, and the threaded connection part in the embodiment; Figure 4 This is a schematic diagram of the main body of the lower flow channel in the embodiment; Figure 5 This is a schematic diagram of the transverse dispensing component in the embodiment. Detailed Implementation

[0011] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0012] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0013] See Figure 1-5As shown, in a preferred embodiment of this utility model, a hot runner structure with side-dispensing adhesive is provided, including a hot nozzle 1 and a mold core 2. The hot nozzle 1 is fixed on the template of the mold, and an injection channel 10 is provided therein. Further, in this embodiment, the hot nozzle 1 includes a lower runner body 3, a transverse dispensing component 4, and a pressure cap 5. The pressure cap 5 is located below the lower runner body 3. The lower runner body 3 and the pressure cap 5 are connected in the vertical direction by a threaded connector 6, and the transverse dispensing component 4 is clamped between the two. In this embodiment, the threaded connector 6 is a screw. The threaded connector 6 passes through the pressure cap 5 and is screwed to the lower runner body 3. The threaded connector 6 presses upward against the pressure cap 5.

[0014] The transverse ejector 4 includes an injection nozzle 41 protruding horizontally from the lower runner body 3. A molding cavity 20 is provided in the mold core 2. A groove 21 for the injection nozzle 41 to extend into is provided at the outer end of the molding cavity 20 in the horizontal direction. A first annular step 210 is provided at the opening of the groove 21, and a second annular step 410 is provided on the outer periphery of the injection nozzle 41. An inclined first guide surface 31 is provided at the lower end of the lower runner body 3, and an inclined second guide surface 42 that slides and conforms to the first guide surface 31 is provided on the transverse ejector 4.

[0015] The transverse dispensing component 4 in this embodiment is very easy to disassemble and replace. Simply loosen the threaded connector 6 and remove the pressure cap 5 to remove the transverse dispensing component 4. Furthermore, when installing the transverse dispensing component 4, the pressure cap 5 abuts against the transverse dispensing component 4 upwards, causing the second guide surface 42 to slide under the guidance of the first guide surface 31. The transverse dispensing component 4 moves horizontally outwards towards the lower flow channel body 3 under the guidance of the first guide surface 31 and the second guide surface 42. At this time, as shown in the figure, the opposing first annular step 210 and the second annular step 410 abut against each other in the horizontal direction to form a seal. Therefore, this embodiment does not require additional heat-sealing parts at the dispensing nozzle 41. The abutment of the first annular step 210 and the second annular step 410 alone forms an annular heat seal in the axial direction of the dispensing nozzle 41, preventing heat loss at the dispensing nozzle 41 and preventing the molten plastic from prematurely solidifying at the dispensing nozzle 41 due to low temperature.

[0016] In this embodiment, a first positioning groove 32 is provided at the lower end of the lower channel body 3, and a second positioning groove 51 is provided at the upper end of the pressure cap 5. The first positioning groove 32, the second positioning groove 51 and the first guide surface 31 form an installation positioning space for the transverse dispensing part 4. When installing the transverse dispensing part 4, the pre-positioning of the transverse dispensing part 4 can be quickly achieved by placing it in the installation positioning space.

[0017] In this embodiment, the lower flow channel body 3 is provided with an inclined first diversion flow channel 33, and the transverse dispensing part 4 is provided with an inclined second diversion flow channel 43 that connects to the first diversion flow channel 33. The first diversion flow channel 33 has several channels to divert the injection flow channel 10. The transverse dispensing part 4 also has several channels, with each first diversion flow channel 33 corresponding to one transverse dispensing part 4, so that the hot nozzle can dispense glue from the side from multiple directions, and simultaneously realize injection molding of multiple cavities. The flow path from the starting end of the first diversion flow channel 33 to the ending end of the second diversion flow channel 43 gradually changes from vertical to horizontal, thereby achieving the effect of side dispensing.

[0018] In this embodiment, the first diversion channel 33 is provided with a first docking end 34 that docks with the second diversion channel 43, and the second diversion channel 43 is provided with a second docking end 44 that docks with the first diversion channel 33. Both the first docking end 34 and the second docking end 44 are hemispherical groove structures to improve the docking effect of the two channels.

[0019] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A hot runner structure with side-discharge nozzle, comprising a hot nozzle and a mold core, characterized in that: The hot runner includes a lower runner body, a transverse ejector, and a cap. The cap is located below the lower runner body. The lower runner body and the cap are connected vertically via threaded connectors, with the transverse ejector clamped between them. The transverse ejector includes a nozzle protruding horizontally from the lower runner body. A molding cavity is provided in the mold core, and a groove for the nozzle to extend into is provided at the outer end of the molding cavity in the horizontal direction. A first annular step is provided at the opening of the groove, and a second annular step is provided on the outer periphery of the nozzle. The lower end of the main body of the lower channel is provided with an inclined first guide surface, and the transverse dispensing part is provided with an inclined second guide surface that slides and fits against the first guide surface. The pressure cap abuts against the transverse dispensing part upward, so that the transverse dispensing part can move outward in the horizontal direction of the main body of the lower channel under the guidance of the first guide surface and the second guide surface, thereby causing the first annular step and the second annular step to abut and seal in the horizontal direction.

2. The hot runner structure with side-discharge adhesive as described in claim 1, characterized in that: A first positioning groove is provided at the lower end of the lower channel body, and a second positioning groove is provided at the upper end of the pressure cap. The first positioning groove, the second positioning groove and the first guide surface form an installation positioning space for the transverse dispensing component.

3. The hot runner structure with side-discharge adhesive as described in claim 1, characterized in that: The main body of the lower flow channel is provided with an inclined first flow channel, and the transverse dispensing part is provided with an inclined second flow channel that connects with the first flow channel. The flow path from the beginning of the first flow channel to the end of the second flow channel gradually changes from vertical to horizontal.

4. The hot runner structure with side-discharge adhesive as described in claim 3, characterized in that: The first diversion channel is provided with a first docking end that connects to the second diversion channel, and the second diversion channel is provided with a second docking end that connects to the first diversion channel. Both the first docking end and the second docking end are hemispherical groove structures.

5. The hot runner structure with side-discharge adhesive as described in claim 1, characterized in that: The threaded connector is a screw, which passes through the gland and is screwed to the lower flow channel body. The threaded connector presses upward against the gland.

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