CN217891710U

CN217891710U - Heat is chewed and is traded look heat-insulating structure fast

Info

Publication number: CN217891710U
Application number: CN202222176916.5U
Authority: CN
Inventors: 苏华锋
Original assignee: Guangdong Plastic Core Molding Technology Co ltd
Current assignee: Guangdong Plastic Core Molding Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-11-25
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a quick color changing and heat insulating structure of a hot nozzle, wherein a sprue bushing is arranged in the lower part of a body and is sleeved outside a nozzle core, a feeding funnel is formed in a die body, and a feeding hole is formed at the lower end of the feeding funnel; the glue outlet shuttle hole is formed in the gasket part and communicated with the nozzle core flow passage, the gasket part is clamped between the bottom surface of the nozzle core and the inner wall of a feeding hopper, the plug sleeve part is clamped between the outer wall of the nozzle core and the inner wall of a sprue bush, a material passing hole is formed in the gasket part, and the glue outlet shuttle hole is communicated with a feeding hole. The utility model discloses a heat is chewed and is traded look heat-insulating structure fast and be favorable to trading look easy operation swift, is favorable to improving injection moulding product quality and reduces extravagant material.

Description

Heat is chewed and is traded look heat-insulating structure fast

Technical Field

The utility model relates to a hot runner injection mold field, concretely relates to heat is chewed and is traded look thermal-insulated structure fast.

Background

At present, a hot runner injection mold is an injection mold provided with a heating device to enable plastic in a flow channel to be always in a molten state, the hot runner comprises a hot nozzle for injecting the plastic in the molten state into a cavity, the hot nozzle comprises a body, a gate driver and a nozzle core, the gate driver is installed in the lower portion of the body, the gate driver is sleeved outside the nozzle core, a glue outlet is formed at the lower end of the nozzle core, and the glue outlet is communicated with a feed inlet of the mold body. Although the lower end of the sprue bush is in adaptive contact with the die body, the sealing effect is poor, so that plastic in a molten state leaks from the position between the sprue bush and the die body, the plastic in the molten state can also permeate into a gap between the sprue bush and the nozzle core, the molten plastic at a dead angle cannot flow into the die cavity every time during molding, the plastic staying at the dead angle for a long time can be decomposed or discolored, when in injection molding production, a small amount of discolored plastic at the dead angle is brought into the die cavity together with new materials, so that the product has poor phenomena of color difference, unclean surface, quality reduction and the like, the nozzle core can be seriously blocked, and at the moment, the product needs to be cleaned after manual disassembly, and a large amount of manpower and material resources are wasted; when materials with different colors are replaced, a large amount of new color materials are required to be discharged to remove the original color materials remained at the dead angle position of the hot nozzle, and sometimes even a large amount of new materials are discharged, the materials at the dead angle position are difficult to be completely removed, so that resource waste is caused, and the product quality is influenced; there is a need for an improved prior art hot nozzle structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a heat and chew and trade look thermal-insulated structure fast, it is favorable to trading look easy operation swift, is favorable to improving injection moulding product quality and reduces extravagant material.

The purpose of the utility model is realized by the following technical scheme.

The utility model discloses a quick look thermal-insulated structure that trades of hot nozzle, including body, runner department, chewing core and mould body, runner department installs in the lower part of body, runner department cover is established outside the chewing core, be formed with feed hopper in the mould body, feed hopper's lower extreme is formed with the feed inlet; the glue-discharging shuttle bottle is characterized by further comprising a sealing cap, the sealing cap comprises a gasket portion and a plug sleeve portion, the outer end of the gasket portion and the lower end of the plug sleeve portion are integrally connected, a nozzle core flow channel is formed in the nozzle core, a nozzle core bottom surface is formed on the nozzle core, a glue-discharging shuttle hole is formed in the lower portion of the nozzle core, the lower end of the glue-discharging shuttle hole penetrates through the nozzle core bottom surface, the upper end of the glue-discharging shuttle hole is communicated with the nozzle core flow channel, the gasket portion is clamped between the nozzle core bottom surface and the inner wall of the feeding funnel, the plug sleeve portion is clamped between the outer wall of the nozzle core and the inner wall of the sprue, a material through hole is formed in the gasket portion, and the glue-discharging shuttle hole is communicated and connected with the feeding hole through the material through hole.

Preferably, a horn mouth part is formed in the lower part of the sprue bush part, a plug bush outer wall is formed in the plug bush part, the plug bush outer wall is set to be an outer circular conical surface, the plug bush outer wall is in fit and attached connection with the horn mouth part, and the bottom surface of the nozzle core is set to be an inverted outer circular conical surface.

Preferably, an inner convex snap ring is formed at the upper end of the plug sleeve part, a fastening groove is formed at the lower part of the mouth core, and the inner convex snap ring is in fit fastening connection with the fastening groove.

Preferably, a radial positioning convex ring is formed at the lower end part of the gate driver, the radial positioning convex ring is in fit connection with the upper end part of the feeding funnel, and an axial gap is formed between the lower end surface of the gate driver and the mold body.

Preferably, the middle part of the bottom surface of the chewing core protrudes downwards to form a chewing tip, the glue outlet shuttle holes are uniformly distributed around the axis of the chewing core in the circumferential direction, the glue outlet shuttle holes are arranged to be dispersed from top to bottom, the material passing holes are arranged to be inner conical holes, and the glue outlet shuttle holes are internally tangent to the material passing holes.

Preferably, the sealing cap is provided as a polyimide sealing cap.

Compared with the prior art, the utility model, its beneficial effect is: including gasket portion and cock cover portion through setting up sealing cap, the outer end of gasket portion and the lower extreme of cock cover portion link to each other integrative setting, gasket portion presss from both sides and locates between the inner wall of chewing core bottom surface and feed hopper, cock cover portion presss from both sides and locates between the outer wall of chewing the core and the inner wall of runner department, be formed with the material through hole in the gasket portion, it is connected through the material through hole switch-on to go out to glue shuttle hole and feed inlet, make at the in-process of moulding plastics, molten state's plastics are difficult to take place to leak, thereby be favorable to trading look easy operation swiftly, be favorable to improving injection moulding product quality and reduce extravagant material.

Drawings

Fig. 1 is a schematic view of a three-dimensional cross-sectional structure of the quick color-changing and heat-insulating structure of the hot nozzle of the present invention.

Fig. 2 is a schematic view of a partial structure of the heat nozzle with a color-changing and heat-insulating structure according to fig. 1.

Fig. 3 is a schematic view of a partial structure at a in fig. 2.

Fig. 4 is a schematic perspective view of the sealing cap of the present invention.

Fig. 5 is a schematic sectional structural view of the sealing cap of the present invention.

Fig. 6 is a schematic view of the three-dimensional structure of the chewing core of the present invention.

Fig. 7 is a schematic sectional structure view of the gate driver of the present invention.

Description of reference numerals: 1-a body; 2-a sprue bush; 21-a radial positioning convex ring; 201-horn mouth; 200-axial voids; 3-chewing the core; 301-nozzle core flow channel; 302-glue outlet shuttle holes; 303-catching grooves; 31-the bottom surface of the chewing core; 32-beak tip; 4-sealing the cap; 41-a gasket part; 4101-through hole; 42-a plug sleeve portion; 4201-inner convex snap ring; 4202-sleeve outer wall; 5-a mold body; 51-a feed funnel; 511-feed inlet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model discloses a look thermal-insulated structure is traded fast to heat is chewed, as shown in fig. 1 to fig. 3, including body 1, runner department 2, chew core 3 and the mould body 5, runner department 2 is installed in the lower part of body 1, specifically, the upper portion of runner department 2 is formed with the external screw thread, 2 spiro unions of runner department are installed in the lower part of body 1, 2 adaptation covers of runner department are established outside chewing core 3, the upper portion of chewing core 3 is formed with first outer step, the upper end of runner department 2 supports the downside of leaning on in foretell first outer step, and the up end that core 3 was chewed in the interior step axial support location of body 1 to the core 3 and the body 1 relatively fixed are chewed in the messenger. As shown in fig. 1, a feed hopper 51 is formed in the mold body 5, and a feed inlet 511 is formed at a lower end of the feed hopper 51, the feed inlet 511 communicating with the cavity of the mold. As shown in fig. 1 to fig. 3, the quick color-changing and heat-insulating structure of the hot nozzle of the present invention further includes a sealing cap 4, as shown in fig. 4 and fig. 5, the sealing cap 4 includes a gasket portion 41 and a sleeve portion 42, and the outer end of the gasket portion 41 (i.e., the end portion away from the center of the gasket portion 41) and the lower end of the sleeve portion 42 are integrally connected. As shown in fig. 2, a core flow passage 301 is formed in the core 3, as shown in fig. 6, a core bottom surface 31 is formed in the core 3, as shown in fig. 2, a glue outlet shuttle hole 302 is formed in the lower portion of the core 3, as shown in fig. 2 and 6, the lower end of the glue outlet shuttle hole 302 is arranged to penetrate through the core bottom surface 31, and as shown in fig. 2, the upper end of the glue outlet shuttle hole 302 is arranged to communicate with the core flow passage 301. As shown in fig. 1 and 2, the bead portion 41 is interposed between the core bottom surface 31 and the inner wall of the hopper 51, and the plug portion 42 is interposed between the outer wall of the core 3 and the inner wall of the sprue gate 2, and as shown in fig. 5, a through hole 4101 is formed in the bead portion 41, and as shown in fig. 2, the glue outlet shuttle hole 302 and the feed port 511 are connected to each other through the through hole 4101.

During injection molding, the molten plastic enters the glue outlet shuttle hole 302 through the nozzle core runner 301, and the molten plastic flows to the feed inlet 511 through the material passing hole 4101, as shown in fig. 2, because the gasket part 41 is clamped between the nozzle core bottom surface 31 and the inner wall of the feed hopper 51, the gasket part 41 seals the gap between the nozzle core bottom surface 31 and the inner wall of the feed hopper 51, and prevents the molten plastic from leaking between the body 1 and the mold body 5, and in addition, because the plug sleeve part 42 is clamped between the outer wall of the nozzle core 3 and the inner wall of the sprue bush 2, the molten plastic is further prevented from leaking between the outer wall of the nozzle core 3 and the inner wall of the sprue bush 2, as shown in fig. 2, the leakage path of the molten plastic is bent by the structure that the gasket part 41 is combined with the plug sleeve part 42, so that the molten plastic is less prone to generate leakage, thereby preventing the plastic from accumulating in dead corners, and being beneficial to improving the quality of injection molded products. When the color needs to be changed, plastic is prevented from remaining in the dead angle position, so that the heat nozzle does not need to be disassembled for cleaning, the color changing process is simple and quick, only the new material discharging process is needed for a short time, and only a small amount of new material needs to be discharged, so that the color and the quality of a new injection molding part can be stabilized, and the waste of materials is reduced.

Wherein, sealed cap 4 can adopt prior art's Polyimide (PI) plastics preparation, because the polyimide has the high temperature resistance performance and the chemical stability of preferred, so be favorable to sealed cap 4's sealed effect stable lasting, because the polyimide also has better heat-insulating effect, so avoid the plastics of molten state to flow from the shuttle hole 302 that glues to the in-process of feed inlet 511 and cool down too much and lead to influencing the quality of moulding plastics.

Further, as shown in fig. 7, a bell portion 201 is formed in the lower portion of sprue bush 2, bell portion 201 is formed as an inner conical surface, as shown in fig. 5, bush portion 42 is formed as a bush outer wall 4202, and bush outer wall 4202 is formed as an outer conical surface, as shown in fig. 2, bush outer wall 4202 is fitted in abutment with bell portion 201, as shown in fig. 1, and mold body 5 axially supports the second outer step of the upper portion of body 1, and in the state shown in fig. 2, both sprue bush 2 and core 3 exert a pressing effect on sealing cap 4, that is, slightly elastically deforming sealing cap 4 in compression, and sprue bush 2 and core 3 exert a downward axial force on sealing cap 4 relatively, so that the sealing effect is better by the inner and outer conical fitting structure formed between bush portion 42 and sprue bush 2, and, as shown in fig. 6, bottom surface 31 is formed as an inverted outer conical surface, so that bottom surface 31 is brought into closer abutment with gasket portion 41 under the aforementioned axial force.

Further, as shown in fig. 4 and 5, an inner convex snap ring 4201 is formed at the upper end of plug housing portion 42, as shown in fig. 6, a retaining groove 303 is formed at the lower portion of mouth piece 3, and retaining groove 303 is an annular groove, as shown in fig. 3, inner convex snap ring 4201 is fittingly engaged with retaining groove 303, so that sealing cap 4 is simply fitted to the lower portion of mouth piece 3, and by providing inner convex snap ring 4201 fittingly engaged with retaining groove 303, the leakage path of the plastic in the molten state is further circuitous, which is advantageous for improving the sealing effect. In the process of assembling sealing cap 4, sealing cap 4 is covered from bottom to top toward the lower part of core 3, sleeve portion 42 is elastically deformed to spread so that inner convex snap ring 4201 goes over the outer cylindrical surface of the lower part of core 3, and then inner convex snap ring 4201 slides into snap groove 303, thereby completing the fastening.

Further, as shown in fig. 7, a radial positioning convex ring 21 is formed at the lower end of the gate driver 2, as shown in fig. 2, the radial positioning convex ring 21 is in fit connection with the upper end of the feeding funnel 51, so that the gate driver 2 and the nozzle core 3 are positioned relative to the mold body 5 in the radial direction of the nozzle core 3, as shown in fig. 3, an axial gap 200 is formed between the lower end surface of the gate driver 2 and the mold body 5, and the axial gap 200 is provided to prevent the mold body 5 from propping up the gate driver 2 to cause the body 1 to be jacked up, thereby avoiding affecting the relative axial positioning effect of the body 1 and the mold body 5.

Further, as shown in fig. 6, the middle of the mouth core bottom surface 31 protrudes downwards to form a mouth tip 32, as shown in fig. 2, the mouth tip 32 extends downwards to the feed inlet 511, the mouth tip 32 penetrates through the through hole 4101, as shown in fig. 1 and fig. 6, the glue outlet shuttle holes 302 are uniformly distributed and arranged around the axis of the mouth core 3 in the circumferential direction, the glue outlet shuttle holes 302 are arranged in a shape of scattering from top to bottom, the axis of the glue outlet shuttle holes 302 and the axis of the mouth core flow channel 301 form an included angle of 10 ° to 13 °, as shown in fig. 5, the through hole 4101 is arranged as an inner conical hole, as shown in fig. 1 and fig. 2, the glue outlet shuttle holes 302 are arranged internally tangent to the through hole 4101, so that a dead angle position is prevented from being formed between the lower end opening of the glue outlet shuttle holes 302 and the upper end edge of the through hole 4101, and easy cleaning of the plastic in a molten state is facilitated.

Claims

1. The utility model provides a quick look heat-insulating structure that trades is chewed to heat, includes body (1), runner department (2), chews core (3) and the mould body (5), and install in runner department (2) in the lower part of body (1), runner department (2) cover is established outside chewing core (3), be formed with feed hopper (51) in the mould body (5), the lower extreme of feed hopper (51) is formed with feed inlet (511), its characterized in that: the glue-discharging shuttle cock is characterized by further comprising a sealing cap (4), the sealing cap (4) comprises a gasket part (41) and a sleeve part (42), the outer end of the gasket part (41) and the lower end of the sleeve part (42) are integrally connected, a nozzle core runner (301) is formed in the nozzle core (3), a nozzle core bottom surface (31) is formed on the nozzle core (3), a glue-discharging shuttle hole (302) is formed in the lower portion of the nozzle core (3), the lower end of the glue-discharging shuttle hole (302) penetrates through the nozzle core bottom surface (31), the upper end of the glue-discharging shuttle hole (302) is communicated with the nozzle core runner (301), the gasket part (41) is clamped between the nozzle bottom surface (31) and the inner wall of the feeding funnel (51), the sleeve part (42) is clamped between the outer wall of the nozzle core (3) and the inner wall of the sprue bush (2), a material passing hole (4101) is formed in the gasket part (41), and the glue-discharging shuttle hole (302) and the feed inlet (511) are communicated with the feed port 4101.

2. The hot nozzle rapid color changing heat insulation structure according to claim 1, characterized in that: a horn mouth portion (201) is formed in the lower portion of the sprue bush portion (2), a plug bush outer wall (4202) is formed in the plug bush portion (42), the plug bush outer wall (4202) is set to be an external conical surface, the plug bush outer wall (4202) is in fit, abutting and connection with the horn mouth portion (201), and the chewing core bottom surface (31) is set to be an inverted external conical surface.

3. The quick color-changing heat-insulating structure is chewed to heat according to claim 1, characterized in that: an inward convex snap ring (4201) is formed at the upper end of the plug sleeve portion (42), a buckle groove (303) is formed at the lower portion of the mouth core (3), and the inward convex snap ring (4201) is in matched buckling connection with the buckle groove (303).

4. The hot nozzle rapid color changing heat insulation structure according to claim 1, characterized in that: the lower tip of runner department (2) is formed with radial positioning bulge loop (21), radial positioning bulge loop (21) with the upper end adaptation of feed hopper (51) is connected, be formed with axial space (200) between the lower terminal surface of runner department (2) and the mould body (5).

5. The hot nozzle rapid color changing heat insulation structure according to claim 1, characterized in that: the middle of the nozzle core bottom surface (31) protrudes downwards to form a nozzle tip (32), the glue outlet shuttle holes (302) are uniformly distributed around the axis of the nozzle core (3) in the circumferential direction, the glue outlet shuttle holes (302) are arranged to be dispersed from top to bottom, the material passing holes (4101) are arranged to be inner conical holes, and the glue outlet shuttle holes (302) are internally tangent to the material passing holes (4101).

6. The quick color-changing heat-insulating structure is chewed to heat according to claim 1, characterized in that: the sealing cap (4) is a polyimide sealing cap.