A hot runner mold

Abstract

The present invention discloses a hot runner mold, including a hot runner, a heating component, an upper template assembly and a lower template assembly, wherein the upper template assembly includes an upper template and an upper mold core, and the lower template assembly includes a lower template and a lower mold core. When the upper template and the lower template are buckled together, the discharge port on the hot runner is connected to the inner cavity formed between the upper mold core and the lower mold core. In the present invention, the heat generated by the heating component on the hot runner can ensure that the plastic in the hot runner remains in a molten state, and the discharge port on the hot runner is directly connected to the product molding inner cavity between the upper mold core and the lower mold core, ensuring that the plastic in the entire runner remains in a molten state, thereby improving the injection molding quality and making the surface aesthetics of the injection molded product better. Moreover, the hot runner is non-open, which can avoid the occurrence of wire drawing and leakage, improve the surface quality of the injection molded product, and does not require manual post-processing. The present invention has a simple structure and can effectively reduce production costs.

Description

Technical Field

[0001] The invention relates to a mould, in particular to a hot runner mould. Background Art

[0002] In the market, some injection molds do not use hot runner systems. This method of injection molding will cause material waste due to the easy cooling of the material in the runner, increasing production costs. The hot runner injection molds used in the market usually use open hot runners. Although the open hot runner has a simple structure, it is prone to wiredrawing and leakage. In addition, the surface quality of the molded workpiece is poor, which easily causes material waste and increases production costs. Summary of the invention

[0003] The purpose of the present invention is to provide a hot runner mold.

[0004] According to one aspect of the present invention, a hot runner mold is provided, comprising a hot runner, a heating component, an upper mold assembly and a lower mold assembly, the heating component is arranged on the hot runner, the hot runner is provided with a feed port and a discharge port, the hot runner is arranged on the upper mold assembly, the upper mold assembly comprises an upper mold and an upper mold core, the upper mold core is arranged on the upper mold, the lower mold assembly comprises a lower mold and a lower mold core, the lower mold core is arranged on the lower mold, when the upper mold and the lower mold are buckled together, the discharge port on the hot runner is connected to the inner cavity formed between the upper mold core and the lower mold core.

[0005] In the present invention, the heat generated by the heating component on the hot runner can ensure that the plastic in the hot runner remains in a molten state, and the discharge port on the hot runner is directly connected to the product molding cavity between the upper mold core and the lower mold core, ensuring that the plastic in the entire runner remains in a molten state, thereby improving the injection molding quality and making the surface aesthetics of the injection molded product better. Moreover, the hot runner is non-open, which can avoid the occurrence of drawing and leakage, thereby improving the surface quality of the injection molded product, and no manual post-processing is required. The structure of the present invention is simple and can effectively reduce production costs.

[0006] In some embodiments, the hot runner may include a manifold A and a manifold B, which are connected and symmetrically arranged about the feed port, at least one hot nozzle A is provided on the manifold A, and the hot nozzle A is connected to the inner cavity of the manifold A, and at least one hot nozzle B is provided on the manifold B, and the hot nozzle B is connected to the inner cavity of the manifold B. When the upper mold plate and the lower mold plate are buckled together, the nozzle head of the hot nozzle A is connected to the inner cavity formed between the upper mold core and the lower mold core, and the nozzle head of the hot nozzle B is connected to the inner cavity formed between the upper mold core and the lower mold core. Thus, two workpieces can be injection molded synchronously through the manifold A and the manifold B. The two workpieces can be the same workpieces, or they can be the front shell and the rear shell of a product. In addition, the hot nozzle A and the hot nozzle B can generate heat separately, effectively ensuring that the plastic in the entire runner remains in a molten state, and the pressure distribution of the hot nozzle A and the hot nozzle B is balanced, the glue discharge is smooth, and the balance is good, which can achieve uniform filling of the product and ensure stable product accuracy.

[0007] In some embodiments, the heating component may include a heating tube A and a heating tube B, wherein the heating tube A is distributed along the upper end surface and the lower end surface of the manifold A, and the heating tube B is distributed along the upper end surface and the lower end surface of the manifold B. Thus, the heating tube A is arranged on the upper end surface and the lower end surface of the manifold A, thereby effectively ensuring that the plastic in the manifold A remains in a molten state, and the heating tube B is arranged on the upper end surface and the lower end surface of the manifold B, thereby effectively ensuring that the plastic in the manifold B remains in a molten state.

[0008] In some embodiments, the heating tube A on the upper end surface of the manifold A can be sunken in the manifold A, the heating tube A on the lower end surface of the manifold A can be sunken in the manifold A, the heating tube B on the upper end surface of the manifold B can be sunken in the manifold B, and the heating tube B on the lower end surface of the manifold B can be sunken in the manifold B. Thus, the heating tube A sunken in the manifold A can effectively improve the heat transfer efficiency, prevent the heating tube A from moving and affecting the heating of the manifold A, protect the heating tube A, and facilitate the connection of the manifold A with other components. The heating tube B sunken in the manifold B can effectively improve the heat transfer efficiency, prevent the heating tube B from moving and affecting the heating of the manifold B, protect the heating tube B, and facilitate the connection of the manifold B with other components.

[0009] In some embodiments, a hot runner template may be further included, the hot runner template is arranged on the upper template, the manifold A and the manifold B are both sunk in the hot runner template, the hot runner template may be provided with a wire groove A for accommodating the line of the heating tube A, and the hot runner template may be provided with a wire groove B for accommodating the line of the heating tube B. When the upper template and the lower template are buckled together, the nozzle of the hot nozzle A passes through the hot runner template and the upper template and communicates with the inner cavity formed between the upper mold core and the lower mold core, and the nozzle of the hot nozzle B passes through the hot runner template and the upper template and communicates with the inner cavity formed between the upper mold core and the lower mold core. Thus, the hot runner template can protect the manifold A and the manifold B, the wire groove A on the hot runner template can accommodate the line of the heating tube A, and the wire groove B on the hot runner template can accommodate the line of the heating tube B. When the hot runner template is connected to other components, the line of the heating tube A and the line of the heating tube B will not be affected.

[0010] In some embodiments, a socket may be provided on the hot runner template, the socket is connected to the heating tube A, the socket is connected to the heating tube B, the socket is connected to the hot nozzle A, and the socket is connected to the hot nozzle B. Thus, by plugging the power control line into the socket, the heating tube A and the heating tube B can be powered and the operation / stop of the heating tube A and the heating tube B can be controlled. At the same time, the hot nozzle A and the hot nozzle B can also be powered and the operation / stop of the hot nozzle A and the hot nozzle B can be controlled. When the mold is not in use, the power control line is unplugged to facilitate the storage and placement of the mold.

[0011] In some embodiments, at least one fixing piece A may be provided on the top of the wire trough A, and the fixing piece A is detachably connected to the hot runner template, and at least one fixing piece B may be provided on the top of the wire trough B, and the fixing piece B is detachably connected to the hot runner template. Thus, the fixing piece A can fix the circuit of the heating tube A to prevent the circuit of the heating tube A from warping, and can effectively protect the circuit of the heating tube A, and the fixing piece B can fix the circuit of the heating tube B to prevent the circuit of the heating tube B from warping, and can effectively protect the circuit of the heating tube B.

[0012] In some embodiments, it may also include a lower fixed plate, an ejector plate and a plurality of ejector posts, the lower template is arranged on the lower fixed plate, a through groove is arranged on the lower fixed plate, the ejector plate is accommodated in the through groove, a plurality of through holes are arranged on the inner bottom of the through groove, one end of the ejector post is arranged on the ejector plate, the other end of the ejector post is inserted in the lower template, and when the upper template and the lower template are buckled together, the other end of the ejector post is against the bottom of the upper template. Thus, after the injection molding is completed, the ejector plate in the through groove can be lifted up through the through hole on the lower fixed plate, the ejector plate drives the ejector post to move synchronously, the ejector post can lift up the upper template, so that the upper template and the lower template are separated, that is, the upper mold core and the lower mold core are separated, so that the molded workpiece can be taken out, and when re-injection molding is required, the force of lifting the ejector plate is canceled, the ejector plate is reset, and the ejector plate drives the ejector post to move synchronously in the opposite direction, so that the upper template and the lower template are buckled together again.

[0013] In some embodiments, a plurality of guide posts may be included, one end of which is disposed at the bottom of the lower mold plate, and the other end of which is inserted into the ejector plate, and the ejector plate can slide back and forth along the guide posts. Thus, the existence of the guide posts can make the ejector plate reciprocate more smoothly without jumping.

[0014] In some embodiments, four pneumatic columns may be included, and a plurality of annular grooves are provided on the pneumatic columns along the axial direction. One end of the pneumatic column is inserted into the lower template, and the other end of the pneumatic column passes through the ejector plate and the lower fixed plate in sequence, and the ejector plate can slide back and forth along the pneumatic column. Therefore, the presence of the annular grooves on the pneumatic column can make the ejector plate reciprocate more smoothly, especially when the ejector plate is reset, the impact of the ejector plate on the lower fixed plate can be reduced, which can not only extend the service life of the ejector plate and the lower fixed plate, but also reduce the noise generated by the ejector plate colliding with the lower fixed plate.

[0015] In some embodiments, a positioning protrusion may be provided on the end surface of the lower template that contacts the upper template, and a positioning recess may be provided on the end surface of the upper template that contacts the lower template. When the upper template and the lower template are buckled together, the positioning protrusion on the lower template is inserted into the positioning recess on the upper template. Thus, the plug-in cooperation of the positioning protrusion and the positioning recess can ensure that there is no deviation when the upper template and the lower template are buckled together, and ensure that the upper mold core on the upper template and the lower mold core on the lower template can be accurately buckled together, thereby ensuring the injection molding quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a hot runner mold according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 The schematic diagram of the split structure of the hot runner mold shown;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the upper fixing plate, the hot runner template and the upper template assembly in the hot runner mold shown;

[0019] Figure 4 for Figure 1 A side view of the hot runner mold is shown;

[0020] Figure 5 for Figure 1 A side view of a hot runner mold is shown.

[0021] In the figure: 11, manifold A; 12, manifold B; 13, feed port; 14, positioning ring; 21, heating tube A; 22, heating tube B; 23, hot nozzle A; 24, hot nozzle B; 31, upper mold plate; 311, positioning recess; 312, perforation A; 313, connecting hole B; 32, upper mold core; 321, perforation B; 41, lower mold plate; 42, lower mold core; 411, positioning protrusion; 412, connecting hole A; 413, ejector hole; 414, connecting column; 5, socket; 6, hot runner template; 61, wire groove A; 62, wire groove B; 63, fixing plate A; 64, fixing plate B; 7, lower fixing plate; 71, through groove; 72, bolt A; 73, through hole; 8, ejector plate; 9, ejector column; 10, guide column; 100, pneumatic column; 1001, annular groove; 101, upper fixing plate; 1011, bolt B. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Figures 1 to 5 The structure of a hot runner mold according to an embodiment of the present invention is schematically shown.

[0025] refer to Figures 1 to 5 The hot runner mold includes a hot runner, a heating component, an upper mold assembly and a lower mold assembly. In addition, the hot runner mold may also include a socket 5, a hot runner mold 6, a lower fixing plate 7, an ejector plate 8, an ejector column 9, a guide column 10, a pneumatic column 100 and an upper fixing plate 101.

[0026] refer to Figure 2 The hot runner includes a manifold A11 and a manifold B12. A feed port 13 is formed on the hot runner. The cavity of the manifold A11 is connected to the cavity of the manifold B12. The manifold A11 and the manifold B12 are symmetrically arranged about the feed port 13. The molten plastic can flow into the cavity of the manifold A11 after passing through the feed port 13. At the same time, the molten plastic can flow into the cavity of the manifold B12 after passing through the feed port 13.

[0027] refer to Figure 2 In this embodiment, the diverter plate A11 and the diverter plate B12 are both T-shaped. In other embodiments, the shapes of the diverter plate A11 and the diverter plate B12 can be adaptively adjusted according to the shape of the workpiece.

[0028] refer to Figure 2 The heating component includes a heating tube A21 and a heating tube B22; the heating tube A21 is arranged on the upper end surface and the lower end surface of the manifold A11, and the heating tube A21 on the upper end surface of the manifold A11 is sunk in the manifold A11, that is, the upper end surface of the heating tube A21 is flush with the upper end surface of the manifold A11, and the heating tube A21 on the lower end surface of the manifold A11 is also sunk in the manifold A11, that is, the lower end surface of the heating tube A21 is flush with the manifold A11. The lower end surface of plate A11 is flush, and heating tubes B22 are arranged on the upper and lower end surfaces of the diverter plate B12. The heating tube B22 on the upper end surface of the diverter plate B12 is embedded in the diverter plate B12, that is, the upper end surface of the heating tube B22 is flush with the upper end surface of the diverter plate B12, and the heating tube B22 on the lower end surface of the diverter plate B12 is also embedded in the diverter plate B12, that is, the lower end surface of the heating tube B22 is flush with the lower end surface of the diverter plate B12. The upper and lower end surfaces of the manifold A11 are both arranged with heating tubes A21, thereby effectively ensuring that the plastic in the manifold A11 remains in a molten state; the upper and lower end surfaces of the manifold B12 are both arranged with heating tubes B22, thereby effectively ensuring that the plastic in the manifold B12 remains in a molten state; the heating tube A21 is sunken in the manifold A11, which can effectively improve the heat transfer efficiency, prevent the heating tube A21 from moving and affecting the heating of the manifold A11, and protect the heating tube A21, as well as facilitate the connection between the manifold A11 and other components; the heating tube B22 is sunken in the manifold B12, which can effectively improve the heat transfer efficiency, prevent the heating tube B22 from moving and affecting the heating of the manifold B12, and protect the heating tube B22, as well as facilitate the connection between the manifold B12 and other components.

[0029] refer to Figure 2Two hot nozzles A23 are installed on the diverter plate A11, and two discharge ports (not shown) are formed at the bottom of the diverter plate A11. A hot nozzle A23 is installed on each discharge port, and the two hot nozzles A23 are respectively located at two free ends of the diverter plate A11, and the hot nozzle A23 is connected to the inner cavity of the diverter plate A11 through the discharge port; two hot nozzles B24 are installed on the diverter plate B12, and two discharge ports (not shown) are formed at the bottom of the diverter plate B12. A hot nozzle B24 is installed on each discharge port, and the two hot nozzles B24 are respectively located at two free ends of the diverter plate B12, and the hot nozzles B24 are connected to the inner cavity of the diverter plate B12 through the discharge port. Two workpieces can be injection molded simultaneously through the manifold A11 and the manifold B12. The two workpieces can be the same workpieces or the front shell and the rear shell of a product. In addition, the hot nozzle A23 and the hot nozzle B24 can generate heat independently, effectively ensuring that the plastic in the entire flow channel remains in a molten state. Moreover, the pressure distribution of the hot nozzle A23 and the hot nozzle B24 is balanced, the glue discharge is smooth and the balance is good, which can achieve uniform filling of the product and ensure stable product precision.

[0030] refer to Figure 2 The manifold A11 and the manifold B12 are both immersed in the hot runner template 6, that is, a concave cavity for accommodating the manifold A11 and the manifold B12 is formed on the hot runner template 6, and the shape of the concave cavity corresponds to the shape of the manifold A11 and the manifold B12. The hot runner template 6 can protect the manifold A11 and the manifold B12, and facilitate the connection between the hot runner template 6 and other components.

[0031] refer to Figure 2 A wire groove A61 and a wire groove B62 are formed on the hot runner template 6. The wiring of the heating tube A21 and the wiring of the two hot nozzles A23 can be accommodated in the wire groove A61, and the wiring of the heating tube B22 and the two hot nozzles B24 can be accommodated in the wire groove B62. A socket 5 is installed on the side of the hot runner template 6. The socket 5 is connected to the heating tube A21, the socket 5 is connected to the heating tube B22, the socket 5 is connected to the hot nozzle A23, and the socket 5 is connected to the hot nozzle B24. The wiring between the socket 5 and the heating tube A21, the heating tube B22, the hot nozzle A23, and the hot nozzle B24 is accommodated in the wire groove A61 and the wire groove B62. The wire groove A61 and the wire groove B62 can store and protect the wiring harness so that the hot runner template 6 can be connected with other components.

[0032] refer to Figure 2A fixing piece A63 is installed on the top of the wire groove A61, and one end of the fixing piece A63 is detachably connected to the hot runner template 6, such as being fixed to the hot runner template 6 by screws, or being installed on the hot runner template 6 by flipping buckles, and the other end of the fixing piece A63 is suspended on the top of the wire groove A61; seven fixing pieces B64 are installed on the top of the wire groove B62, and one end of the fixing piece B64 is detachably connected to the hot runner template 6, such as being fixed to the hot runner template 6 by screws, or being installed on the hot runner template 6 by flipping buckles, and the fixing piece The other end of B64 is suspended on the top of the wire groove B62; the fixing plate A63 can fix the wire bundle of the heating tube A21 and the wire bundle of the hot nozzle A23 to prevent the wire bundle of the heating tube A21 and the wire bundle of the hot nozzle A23 from warping, and can effectively protect the wire bundle of the heating tube A21 and the wire bundle of the hot nozzle A23; the fixing plate B64 can fix the wire bundle of the heating tube B22 and the wire bundle of the hot nozzle B24 to prevent the wire bundle of the heating tube B22 and the wire bundle of the hot nozzle B24 from warping, and can effectively protect the wire bundle of the heating tube B22 and the wire bundle of the hot nozzle B24.

[0033] refer to Figure 2 When the manifold A11 and the manifold B12 are sunk in the hot runner template 6, the two hot nozzles A23 on the manifold A11 and the two hot nozzles B24 on the manifold B12 both pass through the hot runner template 6 and extend from the bottom of the hot runner template 6.

[0034] refer to Figure 2 The upper mold assembly includes an upper mold 31 and an upper mold core 32. The upper mold 31 is installed at the bottom of the hot runner mold 6 (refer to Figure 1 ), the upper mold core 32 is embedded in the cavity at the bottom of the upper mold plate 31, and the lower mold plate assembly includes a lower mold plate 41 and a lower mold core 42, and the lower mold core 42 is embedded in the cavity at the top of the lower mold plate 41; when the upper mold plate 31 and the lower mold plate 41 are buckled together, the upper mold core 32 and the lower mold core 42 are also buckled together to form an inner cavity of the injection molded workpiece.

[0035] refer to Figure 2When the manifold A11 and the manifold B12 are sunk in the hot runner template 6, the two hot nozzles A23 pass through the hot runner template 6, the through hole A312 on the upper template 31, and the through hole B321 on the upper mold core 32, and the nozzle head of the hot nozzle A23 is connected to the inner cavity formed between the upper mold core 32 and the lower mold core 42. The two hot nozzles B24 pass through the hot runner template 6, the through hole A312 on the upper template 31, and the through hole B321 on the upper mold core 32, and the nozzle head of the hot nozzle B24 is connected to the inner cavity formed between the upper mold core 32 and the lower mold core 42. In this embodiment, the inner cavity of the injection molded workpiece includes two, the nozzle heads of the two hot nozzles A23 are connected to one inner cavity between the upper mold core 32 and the lower mold core 42, and the nozzle heads of the two hot nozzles B24 are connected to the other inner cavity between the upper mold core 32 and the lower mold core 42, so as to realize synchronous injection molding of two workpieces.

[0036] refer to Figure 2 , the upper end of the connecting column 414 passes through the connecting hole A412 on the lower template 41 and the connecting hole B313 on the upper template 31 in sequence, when the upper template 31 and the lower template 41 are buckled together ( Figure 1 In the state shown), the upper end surface of the connecting column 414 is flush with the upper end surface of the upper template 31, and the upper template 31 can slide up and down along the connecting column 414. The number of the connecting columns 414 is four, and the four connecting columns 414 are distributed at the four corners of the lower template 41.

[0037] refer to Figure 3 Four positioning recesses 311 are formed on the end surface of the upper mold plate 31 that contacts the lower mold plate 41. Figure 2 Four positioning protrusions 411 are installed on the end surface of the lower template 41 that contacts the upper template 31. The four positioning protrusions 411 match the shapes and positions of the four positioning recesses 311. When the upper template 31 and the lower template 41 are buckled together ( Figure 1 In the state shown), the four positioning protrusions 411 on the lower template 41 are respectively inserted into the four positioning recesses 311 on the upper template 31; the insertion and matching of the positioning protrusions 411 and the positioning recesses 311 can ensure that there is no deviation when the upper template 31 and the lower template 41 are buckled together, ensuring that the upper mold core 32 on the upper template 31 and the lower mold core 42 on the lower template 41 can be accurately buckled together to ensure the injection molding quality of the workpiece. In other embodiments, the positions of the positioning recesses 311 and the positioning protrusions 411 can be interchanged. In addition, a boss can also be installed on the end surface of the upper template 31 that contacts the lower template 41, and a recess that cooperates with the boss is installed on the end surface of the lower template 41 that contacts the upper template 31. When the upper template 31 and the lower template 41 are buckled together, the boss on the upper template 31 is inserted into the recess on the lower template 41, further ensuring that there is no deviation when the upper template 31 and the lower template 41 are buckled together.

[0038] refer to Figure 1and Figure 5 The lower template 41 is installed on the lower fixed plate 7, and the lower fixed plate 7 is U-shaped. The lower fixed plate 7 includes two longitudinal beams and one transverse beam. The two longitudinal beams and one transverse beam form the U-shaped lower fixed plate 7. A plurality of bolts A72 pass through the longitudinal beams of the lower fixed plate 7 and are twisted in the lower template 41, thereby fixing the lower template 41 on the lower fixed plate 7.

[0039] refer to Figure 1 and Figure 5 Since the lower fixing plate 7 is in a U shape, a through slot 71 is provided on the lower fixing plate 7, and the ejector plate 8 is accommodated in the through slot 71. The width of the ejector plate 8 is slightly smaller than the width of the through slot 71, and the length of the ejector plate 8 is equivalent to the length of the through slot 71; Figure 4 , two through holes 73 are formed on the bottom of the through groove 71; Figure 2 The lower end of the ejector column 9 is fixed on the ejector plate 8, and the upper end of the ejector column 9 is inserted into the ejector hole 413 on the lower template 41. When the upper template 31 and the lower template 41 are buckled together, the upper end of the ejector column 9 abuts against the bottom of the upper template 31, that is, when the upper template 31 and the lower template 41 are buckled together, the upper end of the ejector column 9 is flush with the upper end surface of the lower template 41; the outer diameter of the ejector column 9 is slightly smaller than the inner diameter of the ejector hole 413, ensuring that the ejector column 9 can slide up and down in the ejector hole 413 on the lower template 41. Reference Figure 2 In this embodiment, there are four ejector posts 9, which are distributed at four corners of the ejector plate 8 to ensure balanced force.

[0040] refer to Figure 4 and Figure 5 , when the workpiece is injection molded, the ejector plate 8 in the through slot 71 can be lifted up through the two through holes 73 on the lower fixed plate 7, and the ejector plate 8 drives the four ejector posts 9 to move synchronously. The four ejector posts 9 move upward in the four ejector holes 413 on the lower template 41, and the four ejector posts 9 can lift up the upper template 31, so that the upper template 31 and the lower template 41 are separated, that is, the upper mold core 32 and the lower mold core 42 are separated. At this time, the molded workpiece can be taken out. When it is necessary to inject again, the force of the ejector plate 8 being lifted up is cancelled, and the ejector plate 8 is reset. The ejector plate 8 drives the four ejector posts 9 to move synchronously in the opposite direction, and the four ejector posts 9 move downward in the four ejector holes 413 on the lower template 41. When the ejector plate 8 is completely reset ( Figure 5 In the state shown in the figure, the upper ends of the four top pillars 9 are flush with the upper end surface of the lower template 41. At this time, the upper template 31 and the lower template 41 are buckled together again, and the upper mold core 32 and the lower mold core 42 are buckled together again.

[0041] refer to Figure 2 and Figure 5A plurality of guide columns 10 are installed between the lower template 41 and the cross beam of the lower fixed plate 7. The upper ends of the guide columns 10 are fixed to the bottom of the lower template 41. The lower ends of the guide columns 10 pass through the ejector plate 8 and are inserted in the cross beam of the lower fixed plate 7. The ejector plate 8 can slide back and forth up and down along the guide columns 10. When the workpiece needs to be ejected after injection molding, the existence of the guide columns 10 can make the ejector plate 8 move back and forth more smoothly without jumping.

[0042] refer to Figure 2 and Figure 4 A pneumatic column 100 is also installed between the lower template 41 and the crossbeam of the lower fixed plate 7. The upper end of the pneumatic column 100 passes through the crossbeam of the lower fixed plate 7 and the ejector plate 8 in sequence and is inserted into the lower template 41. The ejector plate 8 can slide back and forth up and down along the pneumatic column 100. There are four pneumatic columns 100, which are distributed at the four corners of the ejector plate 8 to ensure that the ejector plate 8 is subjected to balanced force.

[0043] refer to Figure 2 A plurality of annular grooves 1001 are formed in the axial direction of the pneumatic column 100, and the plurality of annular grooves 1001 are evenly distributed along the length direction of the pneumatic column 100. When the ejector plate 8 slides up and down along the pneumatic column 100, the presence of the annular grooves 1001 can make the ejector plate 8 reciprocate more smoothly, especially when the ejector plate 8 is reset, the impact of the ejector plate 8 on the crossbeam of the lower fixed plate 7 can be reduced, which can not only extend the service life of the ejector plate 8 and the lower fixed plate 7, but also reduce the noise generated by the ejector plate 8 colliding with the lower fixed plate 7.

[0044] refer to Figure 1 and Figure 2 An upper fixing plate 101 is installed on the top of the hot runner template 6, and multiple bolts B1011 pass through the upper fixing plate 101 and the hot runner template 6 in sequence and are twisted in the upper template 31, thereby fixing the upper fixing plate 101, the hot runner template 6, and the upper template 31 together.

[0045] refer to Figure 1 A positioning ring 14 is installed on the upper fixing plate 101 , and the feed port 13 on the hot runner is located in the positioning ring 14 . The positioning ring 14 can facilitate the injection port of the injection molding machine to be accurately docked on the feed port 13 .

[0046] In the present invention, the heat generated by the two layers of heating tubes A21 on the manifold A11 can ensure that the plastic in the manifold A11 remains in a molten state, and the heat generated by the two layers of heating tubes B22 on the manifold B12 can ensure that the plastic in the manifold B12 remains in a molten state. At the same time, the two hot nozzles A23 on the manifold A11 and the two hot nozzles B24 on the manifold B12 can also generate heat independently, which can effectively ensure that the plastic in the entire flow channel remains in a molten state, thereby improving the injection molding quality and making the surface aesthetics of the injection molded product better. In addition, the hot runner is not open, which can avoid the occurrence of drawing and leakage, improve the surface quality of the injection molded product, and do not require manual post-processing. In addition, the pressure distribution of the hot nozzles A23 and B24 is balanced, the glue discharge is smooth, and the balance is good, which can achieve uniform filling of the product and ensure the stability of product precision. ; Plug the power control line into the socket 5, and the heating tube A21, the heating tube B22, the hot nozzle A23, and the hot nozzle B24 can be powered and the operation / stop of the heating tube A21, the heating tube B22, the hot nozzle A23, and the hot nozzle B24 can be controlled. When the mold is not in use, unplug the power control line to facilitate the storage and placement of the mold; after the injection molding of the workpiece is completed, the ejector plate 8 is lifted up through the two through holes 73, and the ejector plate 8 drives the four ejector pillars 9 to move synchronously. The four ejector pillars 9 lift the upper mold plate 31, so that the upper mold core 32 and the lower mold core 42 are separated. At this time, the molded workpiece can be taken out. When injection molding is required again, the force of the ejector plate 8 being lifted up is cancelled, and the ejector plate 8 is reset. The ejector plate 8 drives the four ejector pillars 9 to move synchronously in the opposite direction. When the ejector plate 8 is completely reset, the upper mold core 32 and the lower mold core 42 are buckled together again. The structure of the present invention is simple, and the injection molding quality can be improved, and the production cost can be effectively reduced.

[0047] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A hot runner mold, characterized in that: It includes a hot runner, a heating component, an upper mold assembly, a lower mold assembly, a lower fixing plate, an ejector plate and multiple ejector columns. The heating component is arranged on the hot runner, and the hot runner is provided with a feed port and a discharge port, and the hot runner is arranged on the upper mold plate assembly. The upper template assembly comprises an upper template and an upper mold core, wherein the upper mold core is arranged on the upper template. The lower template assembly includes a lower template and a lower mold core, wherein the lower mold core is arranged on the lower template. When the upper mold plate and the lower mold plate are buckled together, the outlet on the hot runner is connected to the inner cavity formed between the upper mold core and the lower mold core. The lower template is arranged on the lower fixed plate, the lower fixed plate is provided with a through slot, the ejector plate is accommodated in the through slot, a plurality of through holes are arranged on the inner bottom of the through slot, one end of the ejector column is arranged on the ejector plate, and the other end of the ejector column is inserted into the lower template. When the upper and lower templates are buckled together, the other end of the top column rests against the bottom of the upper template. It also includes four pneumatic columns, on which a plurality of annular grooves are arranged along the axial direction, one end of the pneumatic column is inserted into the lower mold plate, and the other end of the pneumatic column passes through the ejector plate and the lower fixed plate in sequence, and the ejector plate can slide back and forth along the pneumatic column. When the ejector plate is reset, the annular groove on the pneumatic column can reduce the impact of the ejector plate on the lower fixed plate.

2. The hot runner mold according to claim 1, characterized in that: The hot runner includes a manifold plate A and a manifold plate B, which are connected to each other and arranged symmetrically about the feed port. The manifold plate A is provided with at least one hot nozzle A, which is connected to the inner cavity of the manifold plate A. The manifold plate B is provided with at least one hot nozzle B, which is connected to the inner cavity of the manifold plate B. When the upper mold plate and the lower mold plate are buckled together, the nozzle head of the hot nozzle A is connected to the inner cavity formed between the upper mold core and the lower mold core, and the nozzle head of the hot nozzle B is connected to the inner cavity formed between the upper mold core and the lower mold core.

3. The hot runner mold according to claim 2, characterized in that: The heating component includes a heating tube A and a heating tube B. The heating tube A is distributed along the upper end surface and the lower end surface of the diverter plate A, and the heating tube B is distributed along the upper end surface and the lower end surface of the diverter plate B.

4. The hot runner mold according to claim 3, characterized in that: The heating tube A on the upper end surface of the diverter plate A is sunken in the diverter plate A, the heating tube A on the lower end surface of the diverter plate A is sunken in the diverter plate A, the heating tube B on the upper end surface of the diverter plate B is sunken in the diverter plate B, and the heating tube B on the lower end surface of the diverter plate B is sunken in the diverter plate B.

5. The hot runner mold according to claim 3, characterized in that: The hot runner template is also included. The hot runner template is arranged on the upper template. The manifold A and the manifold B are both sunk in the hot runner template. The hot runner template is provided with a wire groove A for accommodating the line of the heating tube A. The hot runner template is provided with a wire groove B for accommodating the line of the heating tube B. When the upper mold plate and the lower mold plate are buckled together, the nozzle head of hot nozzle A passes through the hot runner mold plate, the upper mold plate and communicates with the inner cavity formed between the upper mold core and the lower mold core, and the nozzle head of hot nozzle B passes through the hot runner mold plate, the upper mold plate and communicates with the inner cavity formed between the upper mold core and the lower mold core.

6. The hot runner mold according to claim 5, characterized in that: At least one fixing piece A is provided on the top of the wire trough A, and the fixing piece A is detachably connected to the hot runner template. At least one fixing piece B is provided on the top of the wire trough B, and the fixing piece B is detachably connected to the hot runner template.

7. The hot runner mold according to claim 5, characterized in that: A socket is provided on the hot runner template, the socket is connected to the heating tube A, the socket is connected to the heating tube B, the socket is connected to the hot nozzle A, and the socket is connected to the hot nozzle B.

8. The hot runner mold according to claim 1, characterized in that: It also includes a plurality of guide columns, one end of which is arranged at the bottom of the lower mold plate, and the other end of which is inserted into the ejection plate, and the ejection plate can slide back and forth along the guide columns.

9. The hot runner mold according to any one of claims 1 to 7, characterized in that: The end surface of the lower template in contact with the upper template is provided with a positioning protrusion, and the end surface of the upper template in contact with the lower template is provided with a positioning recess. When the upper template and the lower template are buckled together, the positioning protrusion on the lower template is inserted into the positioning recess on the upper template.

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