Split type hot runner structure

Abstract

The utility model relates to the field of injection mold design, in particular to a split type hot runner structure which comprises an upper code mold plate, mounting plates are mounted on the outer walls of the two sides of a plurality of runner plates, guide columns are mounted on the two sides of the surfaces of the bottom ends of the two mounting plates, and grooves allowing the guide columns to be inserted are formed in the surfaces of the bottom ends of the mounting plates. A groove is formed in the upper portion of the hot runner structure, a fixing sleeve is installed in the groove, the fixing sleeve is a stainless steel fixing sleeve, a guide sleeve is installed at the top end of the guide column, and a wear-resistant layer is arranged on the inner wall of the guide sleeve. The stainless steel fixing sleeve has good thermal conductivity, heat generated by a hot runner system is better managed in the injection molding process, the thermal expansion resistance is enhanced through the wear-resisting layer on the inner wall of the guide sleeve, and the risk of precision reduction or damage caused by thermal expansion is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold design field, concretely is a split hot runner structure. BACKGROUND

[0002] Hot runner is a heating assembly system used in injection mold, which injects melted plastic particles into the mold cavity. The hot runner system is fixed and supported by the hot runner plate. The traditional hot runner plate is of a whole structure, and the hot runner is located between the upper clamp plate and the hot runner plate. During installation, the hot runner is first fixed and installed on the hot runner plate, then the hot runner plate is fixed and installed below the upper clamp plate, and the upper clamp plate is fixed and connected from top to bottom by the hot runner plate and the injection mold A0 plate. However, the whole hot runner plate structure has a large area, heavy weight and high cost. Moreover, the traditional mold fixing method requires the parts to be disassembled and assembled one by one when the mold needs to be repaired, which is complicated and labor-intensive.

[0003] After searching, the Chinese patent document application No. 202220884005.5 discloses a split hot runner structure, which includes an upper clamp plate, a plurality of hot runner plates inverted on the bottom of the upper clamp plate, and a cavity for the hot runner reserved between the hot runner plates. A guide column is installed vertically downward on the hot runner plate. The injection mold A0 plate is located below the hot runner plate, and the hot runner is installed on the injection mold A0 plate. After the upper clamp plate and the hot runner plate are assembled, they are connected longitudinally with the injection mold A0 plate. The utility model optimizes the traditional whole hot runner plate to a split hot runner plate, which reduces the weight of the mold, lowers the cost, simplifies the mold disassembly method, and reduces the workload. This structure is versatile and widely applicable.

[0004] However, the above-mentioned split hot runner structure still has the following defects:

[0005] The device uses the guide column to ensure the accurate alignment between the upper clamp plate and the hot runner plate, but in the high-temperature and high-pressure injection molding process, the guide column may be affected by thermal expansion, resulting in a decrease in precision or damage. Therefore, we need a split hot runner structure to solve the above problems. SUMMARY

[0006] The utility model discloses a purpose lies in providing a split hot runner structure, mainly through the cooperation of guide post and guide sleeve, make the whole hot runner structure can keep stable when being subjected to injection pressure, prevent the injection defect caused by misplacement, and the fixed sleeve is made of stainless steel material, has good thermal conductivity and corrosion resistance, help better management heat flow channel system produces heat in the injection process, reduce the adverse effect of heat on guide post and other key components, and the wear -resisting layer set up in the inner wall of guide sleeve enhances the ability of resistance to thermal expansion, effectively reduces the risk of precision decline or damage caused by thermal expansion.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a split hot runner structure, including the upper die plate, the bottom of the upper die plate is installed with a plurality of runner plates, the surface of the upper die plate is installed with the control panel, the inside of a plurality of runner plates is provided with hot runner, the both sides outer wall of a plurality of runner plates is installed with the mounting plate, the bottom surface both sides of two mounting plates are installed with guide post, four guide posts are equidistantly installed in the corner of two mounting plates, the bottom surface of the mounting plate is provided with the recess for the guide post insertion, the inside of the recess is installed with the fixed sleeve, the fixed sleeve is set as stainless steel fixed sleeve, the bottom of the guide post is fixedly installed in the inside of the fixed sleeve, the top of the guide post is installed with the guide sleeve, the inner wall of the guide sleeve is provided with wear -resisting layer.

[0008] Preferably, the inner wall of the mounting plate and the side wall of the runner plate are provided with a limiting assembly, the limiting assembly includes a limiting strip and a limiting groove, the limiting strip is installed on the side wall of the mounting plate, the limiting groove is provided on the side wall of the runner plate, and one side of the limiting strip is installed in the inside of the limiting groove.

[0009] Preferably, the limiting strip is an aluminum alloy limiting strip, and a sealing coating is attached to the inner wall of the limiting groove.

[0010] Preferably, bolts are installed on the bottom surface of the mounting plate, the upper die plate and the mounting plate are provided with threaded holes for the threaded connection of the bolts, and one end of the bolt is threadedly installed in the inside of the threaded hole.

[0011] Preferably, a gasket is sleeved on one end of the bolt, and the side wall of the gasket abuts against the surface of the mounting plate.

[0012] Preferably, injection tubes with different heights are installed on the surface of the runner plate, and an injection nozzle is installed on one end of the injection tube.

[0013] Preferably, limiting holes are provided in the side wall of the fixed sleeve and the mounting plate, a limiting rod is inserted into the inside of the limiting hole, and one end of the limiting rod penetrates through the limiting hole and the bottom end side wall of the guide post.

[0014] Compared with the prior art, the hot runner structure of the utility model has the beneficial effects that:

[0015] 1、The utility model mainly through the cooperation of guide column and guide bushing, make the whole hot runner structure can keep stable when receiving injection pressure, prevent the injection defect caused by misplacement, the fixed sleeve adopts stainless steel material, have good thermal conductivity and corrosion resistance, help better management of the heat generated by hot runner system in the injection process, reduce the adverse effect of heat on guide column and other key components, and the wear -resisting layer set up in the inner wall of guide bushing enhances the ability of resisting thermal expansion, effectively reduces the risk of precision decline or damage caused by thermal expansion. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is the three-dimensional structure schematic view of the utility model;

[0018] Figure 3 It is the sectional structure schematic view of the upper stacking template of the utility model;

[0019] Figure 4 It is the structure schematic view of the limiting assembly of the utility model.

[0020] In the drawing: 1, upper stacking template;2, control panel;3, hot runner;4, mounting plate;5, runner plate;501, limiting strip;502, limiting groove;6, injection pipe;7, guide column;701, guide bushing;702, fixed sleeve;8, bolt;801, gasket;9, limiting rod;901, limiting hole. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4The utility model provides a technical scheme: a split hot runner structure, including upper code template 1, a plurality of runner plates 5 are installed to the bottom of upper code template 1, the surface of upper code template 1 is equipped with control panel 2, the inside of a plurality of runner plates 5 is provided with hot runner 3, and the both sides outer wall of a plurality of runner plates 5 is equipped with mounting plate 4, and the bottom end surface both sides of two mounting plates 4 are equipped with guide column 7, four guide columns 7 equidistance installation are in the corner of two mounting plates 4, and the bottom end surface of mounting plate 4 is provided with the recess for the insertion of guide column 7, and the inside of recess is equipped with fixed sleeve 702, and fixed sleeve 702 sets up stainless steel fixed sleeve, and the bottom end of guide column 7 is fixedly installed in the inside of fixed sleeve 702, and the top of guide column 7 is equipped with guide sleeve 701, and the inner wall of guide sleeve 701 is provided with wear-resistant layer,

[0023] When using, through the cooperation of guide column 7 and guide sleeve 701, the whole hot runner structure can keep stable when being subjected to injection pressure, prevents injection defects caused by misplacement, the fixed sleeve 702 is made of stainless steel material, has good thermal conductivity and corrosion resistance, helps better manage the heat generated by the hot runner system during injection molding, reduces the adverse effects of heat on key components such as guide column 7, and the wear-resistant layer provided on the inner wall of the guide sleeve 701 enhances the resistance to thermal expansion, effectively reducing the risk of precision decline or damage caused by thermal expansion.

[0024] The inner wall of mounting plate 4 and the side wall of runner plate 5 are provided with a limiting assembly, which includes a limiting strip 501 and a limiting groove 502, the limiting strip 501 is installed on the side wall of the mounting plate 4, the limiting groove 502 is provided on the side wall of the runner plate 5, one side of the limiting strip 501 is installed in the inside of the limiting groove 502, and the cooperation of the limiting strip 501 and the limiting groove 502 can ensure the accurate positioning of the mounting plate 4 and the runner plate 5 during installation, through physical limitation, the limiting strip 501 is firmly installed in the inside of the limiting groove 502, effectively preventing the relative movement between the mounting plate 4 and the runner plate 5, thereby ensuring the stability of the hot runner structure.

[0025] The limiting strip 501 is set as an aluminum alloy limiting strip, and a sealing coating is attached to the inner wall of the limiting groove 502, setting the limiting strip 501 as an aluminum alloy material can significantly improve its deformation resistance and wear resistance, ensuring stable limiting effect during long-term use, and setting the sealing coating on the inner wall of the limiting groove 502 can significantly improve the sealing performance between the limiting strip 501 and the limiting groove 502.

[0026] The bottom end surface of the mounting plate 4 is provided with bolts 8 on both sides, the upper code template 1 and the mounting plate 4 are provided with threaded holes for threaded connection of the bolts 8, one end of the bolt 8 is threaded in the inside of the threaded hole, the connection mode of the bolt 8 and the threaded hole can realize accurate positioning and fixing, during the installation process, the clearance between the upper code template 1 and the mounting plate 4 can be controlled by adjusting the screwing depth of the bolt 8, so as to realize accurate positioning.

[0027] One end of the bolt 8 is sleeved with a gasket 801, the side wall of the gasket 801 abuts against the surface of the mounting plate 4, and the direct installation of the bolt 8 on the mounting plate 4 may cause scratches or damage to the surface of the mounting plate 4, and the use of the gasket 801 can effectively protect the surface of the mounting plate 4 and avoid unnecessary damage to the mounting plate 4 during installation or disassembly.

[0028] The surface of the flow channel plate 5 is provided with injection pipes 6 with different heights, one end of the injection pipe 6 is provided with an injection nozzle, by installing injection pipes 6 with different heights on the flow channel plate 5, the flow path of the plastic melt during injection molding can be optimized, which helps to reduce the flow resistance of the melt in the flow channel and improve the flow speed and filling efficiency of the melt.

[0029] The side wall of the fixing sleeve 702 and the mounting plate 4 are both provided with limiting holes 901, the limiting rod 9 is inserted into the limiting hole 901, one end of the limiting rod 9 penetrates through the limiting hole 901 and penetrates through the bottom end side wall of the guide column 7, the cooperation of the limiting rod 9 and the limiting hole 901 can ensure the stability of the relative position among the fixing sleeve 702, the mounting plate 4 and the guide column 7, effectively prevent the structure from loosening or deforming due to vibration or external force, so as to ensure the stability of the whole structure.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A split hot runner structure comprising an upper mold plate (1), characterized in that: The bottom end of the upper mold template (1) is provided with a plurality of flow channel plates (5), the surface of the upper mold template (1) is provided with a control panel (2), the inside of the plurality of flow channel plates (5) is provided with a hot runner (3), the both sides of the plurality of flow channel plates (5) are provided with mounting plates (4), the bottom end surface of the two mounting plates (4) is provided with guide columns (7), the four guide columns (7) are equidistantly arranged at the corners of the two mounting plates (4), the bottom end surface of the mounting plate (4) is provided with a groove for inserting the guide column (7), the inside of the groove is provided with a fixing sleeve (702), the fixing sleeve (702) is made of stainless steel, the bottom end of the guide column (7) is fixedly arranged in the fixing sleeve (702), and the top end of the guide column (7) is provided with a guide sleeve (701).

2. The split hot runner structure of claim 1, wherein: The inner wall of the mounting plate (4) and the side wall of the flow channel plate (5) are provided with a limiting assembly, the limiting assembly comprises a limiting strip (501) and a limiting groove (502), the limiting strip (501) is arranged on the side wall of the mounting plate (4), and the limiting groove (502) is arranged on the side wall of the flow channel plate (5).

3. The split hot runner structure of claim 2, wherein: The limiting strip (501) is made of aluminum alloy, and the inner wall of the limiting groove (502) is provided with a sealing coating.

4. The split hot runner structure of claim 3, wherein: The bottom end surface of the mounting plate (4) is provided with bolts (8) on both sides, the upper mold template (1) and the mounting plate (4) are provided with threaded holes for threadedly connecting the bolts (8), and one end of the bolt (8) is threadedly arranged in the threaded hole.

5. The split hot runner structure of claim 4, wherein: One end of the bolt (8) is sleeved with a gasket (801), and the side wall of the gasket (801) abuts against the surface of the mounting plate (4).

6. The split hot runner structure of claim 5, wherein: The surface of the flow channel plate (5) is provided with injection pipes (6) with different heights, and one end of the injection pipe (6) is provided with an injection nozzle.

7. The split hot runner structure of claim 6, wherein: The side wall of the fixing sleeve (702) and the mounting plate (4) are provided with limiting holes (901), the inside of the limiting hole (901) is inserted with a limiting rod (9), and one end of the limiting rod (9) penetrates through the limiting hole (901) and penetrates through the bottom end side wall of the guide column (7).

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