CN213733167U

CN213733167U - Cold runner squirt structure

Info

Publication number: CN213733167U
Application number: CN202022753538.3U
Authority: CN
Inventors: 张世平; 鄢恩生
Original assignee: Dongguan Hot Link Hot Runner Systems Co ltd
Current assignee: Dongguan Hot Link Hot Runner Systems Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-07-20
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to the field of injection molding, in particular to a cold runner sprue bushing structure, which comprises a bushing core, a bushing sleeve arranged outside the bushing core, a sizing material channel arranged in the bushing core, a cooling device arranged between the bushing core and the bushing sleeve and a bushing sleeve detachably connected with the bushing core; the nozzle core is provided with a contact end, the contact end extends out of the nozzle sleeve in a protruding mode, the nozzle head sleeve is provided with a first annular flange and a conical glue outlet channel, the first annular flange is in contact with the end face of the contact end, and the first annular flange extends out of the contact end and is located below the nozzle sleeve; and the glue inlet of the glue outlet channel is communicated with the glue outlet of the glue material channel. The utility model guides the flow of the sizing material through the conical glue outlet channel, thereby accelerating the flowing speed of the sizing material; the rubber material in the nozzle core is cooled through a cooling device, so that the rubber material is prevented from being blocked in a rubber material channel; the nozzle core and the nozzle sleeve are prevented from contacting with an external device through the nozzle head sleeve, and the sealing performance and the stability of the structure of the cold runner sprue bushing are improved.

Description

Cold runner squirt structure

Technical Field

The utility model belongs to the technical field of injection moulding and specifically relates to indicate a cold runner purt structure.

Background

In recent years, silica gel products are widely used due to their soft touch and high and low temperature resistance, and thermosetting silica gel injection molding is a process in which a fluid-shaped rubber material is injected into a cavity and then the rubber material in the cavity is heated to be cured. The cold runner mold is adopted to perform injection molding on the thermosetting silica gel, so that the temperature and the flowability of the sizing material are kept low before the sizing material is injected into the mold cavity, the cold runner mold has the advantages of high production speed, low processing degree, low rejection rate and the like, and the development of the cold runner mold has great market potential; when the sprue bushing structure of the cold runner mold is adopted to feed the rubber into the mold cavity, the rubber material is kept at a lower temperature to ensure the flowability of the rubber material and reduce the blockage of the rubber material. However, the prior art still has the defects of poor sealing performance of a cooling device, poor cooling effect, easy blockage of a sizing material channel and the like in a sprue structure of a cold runner. Therefore, the drawbacks are obvious, and a solution is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a cold runner purt structure, it has improved cooling device's leakproofness and stability, reduces the sizing material simultaneously and blocks for the flow velocity of sizing material.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a cold runner squirt nozzle structure comprises a nozzle core, a nozzle sleeve sleeved outside the nozzle core, a sizing material channel arranged in the nozzle core, a cooling device arranged between the nozzle core and the nozzle sleeve and a nozzle head sleeve detachably connected with the nozzle core; the cooling device cools the rubber in the rubber channel; the nozzle core is provided with a contact end, the contact end extends out of the nozzle sleeve in a protruding mode, the nozzle head sleeve is provided with a first annular flange and a conical glue outlet channel, the first annular flange is in contact with the end face of the contact end, and the first annular flange extends out of the contact end and is located below the nozzle sleeve; the glue inlet of the glue outlet channel is communicated with the glue outlet of the glue material channel, and the caliber of the communicated part of the glue outlet channel 42 and the glue material channel is the largest.

Further, cooling device includes the recess of establishing from the inside concave of mouth core lateral wall and forming, the recess is the heliciform and encircles on mouth core lateral wall, the lateral wall of recess encloses with the mouth cover inside wall and establishes into cooling channel.

Furthermore, the nozzle head sleeve is provided with a protruding end, and the protruding end is arranged on one side of the first annular flange far away from the abutting end.

Furthermore, the nozzle core is provided with a threaded hole, and the nozzle head is sleeved with an external thread surface in threaded connection with the threaded hole.

Furthermore, the nozzle head sleeve is provided with a second annular flange, and the second annular flange is arranged below the external thread surface.

Furthermore, the nozzle head sleeve is provided with a first clamping groove and a first sealing ring arranged in the first clamping groove, the first clamping groove is positioned between the first annular flange and the second annular flange, and the first sealing ring is used for sealing a gap between the outer side wall of the nozzle head sleeve and the inner wall of the nozzle core.

Furthermore, the first annular flange is provided with a second clamping groove and a second sealing ring arranged in the second clamping groove, the second clamping groove is located below the abutting end, and the second sealing ring is used for sealing a gap between the first annular flange and the abutting end.

Further, a third sealing ring is arranged on the outer side wall of the nozzle sleeve and used for sealing a gap between the nozzle sleeve and an external device.

Furthermore, the nozzle core is provided with a fourth sealing ring, the fourth sealing ring is positioned on the outer side wall of the bottom end of the nozzle core, and the fourth sealing ring is used for sealing a gap between the outer side wall of the nozzle core and the inner wall of the nozzle sleeve.

Furthermore, the mouth core is provided with a fifth sealing ring, the fifth sealing ring is located on the top end face of the mouth core, and the fifth sealing ring is used for sealing a gap between the mouth core and an external device.

The utility model has the advantages that: the utility model guides the flow of the sizing material through the conical sizing outlet channel, accelerates the flow speed of the sizing material and reduces the blocking of the sizing material; the rubber material in the nozzle core is cooled through a cooling device, so that the rubber material is prevented from being blocked in a rubber material channel; the nozzle core and the nozzle sleeve are prevented from contacting with an external device through the nozzle head sleeve, and the sealing performance of the cooling device and the stability of the sprue bushing structure of the cold runner are improved.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is an enlarged view of a point a in fig. 1.

Description of reference numerals:

1. a mouth core; 2. a mouth sleeve; 3. a cooling device; 4. a mouth cap sleeve; 5. a sizing material channel; 11. a contact end; 41. a first annular flange; 42. a glue outlet channel; 12. a groove; 13. a cooling channel; 43. a raised end; 44. an external thread surface; 45. a second annular flange; 46. a first clamping groove; 461. a first sealing ring; 47. a second clamping groove; 471. a second sealing ring; 21. a third sealing ring; 14. a fourth sealing ring; 15. and a fifth sealing ring.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 and fig. 2, the utility model provides a cold runner squirt nozzle structure, which comprises a nozzle core 1, a nozzle sleeve 2 sleeved outside the nozzle core 1, a sizing material channel 5 arranged in the nozzle core 1, a cooling device 3 arranged between the nozzle core 1 and the nozzle sleeve 2, and a nozzle head sleeve 4 detachably connected with the nozzle core 1; the cooling device 3 cools the rubber material in the rubber material channel 5. The mouth core 1 is provided with a contact end 11, the contact end 11 protrudes out of the mouth sleeve 2, the mouth sleeve 4 is provided with a first annular flange 41 and a conical glue outlet channel 42, the first annular flange 41 is abutted with the end face of the contact end 11, and the first annular flange 41 protrudes out of the contact end 11 and is positioned below the mouth sleeve 2; the glue inlet of the glue outlet channel 42 is communicated with the glue outlet of the glue material channel 5, and the aperture of the communicated part of the glue outlet channel 42 and the glue material channel 5 is the largest.

In actual use, when the rubber material flows into the rubber outlet channel 42 through the rubber material channel 5, the rubber material is guided through the conical rubber outlet channel 42, the caliber of the rubber outlet channel 42 gradually decreases along the rubber material outflow direction, and the rubber material flows on the inclined surface of the rubber outlet channel 42, so that the flowing speed of the rubber material is increased, the flowing resistance of the rubber material in the rubber outlet channel 42 is reduced, and the heat generated by friction between the rubber material and the rubber outlet channel 42 when the rubber material passes through the rubber outlet channel 42 is reduced. Because the sizing material is heated and solidified easily in the flowing process, the cooling device 3 is used for cooling the sizing material channel 5 and the glue outlet channel 42, so that the sizing material keeps a lower temperature in the flowing process of the sizing material channel 5 and the glue outlet channel 42, the sizing material in the sizing material channel 5 or the glue outlet channel 42 is prevented from being solidified due to the temperature rise, and the blockage caused by the reduction of the fluidity is prevented.

When the nozzle head sleeve 4 is installed, the installation is stopped when the first annular flange 41 is abutted against the abutting end 11, so that the nozzle head sleeve 4 is prevented from being damaged due to the fact that the nozzle head sleeve 4 is excessively installed on the nozzle core 1; the first annular flange 41 protrudes out of the abutting end 11 and is positioned below the nozzle sleeve 2, and the first annular flange 41 does not contact with the lower end face of the nozzle sleeve 2 because the abutting end 11 protrudes out of the nozzle sleeve 2; when in injection molding, the first annular flange 41 is firstly contacted with an external device and is abutted against the external device, so that the nozzle core 1 and the nozzle sleeve 2 are prevented from being directly contacted with the external device, and the nozzle core 1 and the nozzle sleeve 2 are protected; because the nozzle sleeve 2 is sleeved outside the nozzle core 1, and the first annular flange 41 only abuts against the nozzle core 1, when the first annular flange 41 is extruded by an external device, the abutting end 11 is extruded by the first annular flange 41, but the upper part of the nozzle core 1 is also extruded by the glue feeding device, the position of the nozzle core 1 cannot move when the nozzle core 1 is extruded by the first annular flange 41, and the relative position of the nozzle core 1 and the nozzle sleeve 2 cannot change; if the lower end surface of the nozzle sleeve 2 is in contact with the first annular flange 41 and is subjected to extrusion force, the nozzle core 1 and the nozzle sleeve 2 are respectively subjected to the extrusion force of the first annular flange 41, however, the upper part of the nozzle sleeve 2 is not connected with other devices, the nozzle sleeve 2 is extruded to enable the nozzle sleeve 2 to displace relative to the nozzle core 1, the stability of the cold runner squirt nozzle structure during injection molding is affected, and the sealing performance and the stability of the cooling device 3 between the nozzle core 1 and the nozzle sleeve 2 are damaged.

According to a further technical scheme, the cooling device 3 comprises a groove 12 formed by inwards recessing the outer side wall of the nozzle core 1, the groove 12 spirally surrounds the outer side wall of the nozzle core 1, and a cooling channel 13 is formed by enclosing the side wall of the groove 12 and the inner side wall of the nozzle sleeve 2; specifically, the plug bush 2 is provided with a liquid inlet flow channel and a liquid outlet flow channel, the liquid inlet flow channel is communicated with a liquid inlet of the cooling channel 13, and a liquid outlet of the cooling channel 13 is communicated with the liquid outlet flow channel.

By continuously introducing the cooling liquid into the cooling channel 13, the cooling liquid continuously cools the rubber material in the nozzle core 1, and the rubber material is prevented from being solidified due to the temperature rise of the rubber material, so that the rubber material channel 5 or/and the rubber material outlet channel 42 are/is blocked.

According to a further technical scheme, the nozzle head sleeve 4 is provided with a protruding end 43, and the protruding end 43 is arranged on one side, far away from the contact end 11, of the first annular flange 41.

When injection molding is carried out, the protruding end 43 protrudes into the injection molding hole of the mold, and the rubber material passing through the rubber outlet channel 42 directly enters the injection molding hole of the mold, so that the rubber material is prevented from being oxidized due to contact with air; and the elimination of the trace of the injection opening can be omitted after the injection molding, so that the injection molding surface of the mold is smoother and smoother.

According to a further technical scheme, the nozzle core 1 is provided with a threaded hole, and the nozzle head sleeve 4 is provided with an external thread surface 44 in threaded connection with the threaded hole.

The nozzle head sleeve 4 is locked with the nozzle core 1 in a threaded connection mode, the nozzle head sleeve 4 is convenient to mount and dismount, the nozzle head sleeve 4 can be taken down to be cleaned when rubber materials are blocked in the rubber material channel 5 or/and the rubber outlet channel 42, and the cleaning and the maintenance are convenient.

In a further technical scheme, the mouth cap sleeve 4 is provided with a second annular flange 45, and the second annular flange 45 is arranged below the external thread surface 44.

When the nozzle tip sleeve 4 is in threaded connection with the nozzle core 1, the annular flange II 45 protrudes out of the threaded hole of the nozzle core 1, when rubber flows through the rubber passage 5 and flows into the rubber outlet passage 42, in order to prevent the rubber from leaking to an external device from the threaded connection position of the nozzle core 1 and the nozzle tip sleeve 4, the leaked rubber is blocked by the annular flange II 45, the rubber is prevented from further leaking to the outside of the nozzle core 1, and the external device is damaged.

In a further technical scheme, the nozzle head cover 4 is provided with a first clamping groove 46 and a first sealing ring 461 installed on the first clamping groove 46, the first clamping groove 46 is located between the first annular flange 41 and the second annular flange 45, and the first sealing ring 461 is used for sealing a gap between the outer side wall of the nozzle head cover 4 and the inner wall of the nozzle core 1.

When the rubber material flows through the rubber material channel 5 and flows into the rubber material outlet channel 42, in order to further prevent the rubber material from leaking to an external device from the screw joint position of the nozzle core 1 and the nozzle head sleeve 4, the rubber material is firmly blocked in the nozzle core 1 by additionally arranging the annular flange II 45 and the sealing ring I461, and the rubber material is prevented from leaking to the external device from the joint position of the nozzle core 1 and the nozzle head sleeve 4, so that the rubber material is wasted and the external device is damaged.

In a further technical scheme, the first annular flange 41 is provided with a second clamping groove 47 and a second sealing ring 471 arranged on the second clamping groove 47, the second clamping groove 47 is located below the abutting end 11, and the second sealing ring 471 is used for sealing a gap between the first annular flange 41 and the abutting end 11. The sealing performance of the cold runner squirt nozzle structure is improved by additionally arranging a sealing ring II 471.

According to the further technical scheme, a third sealing ring 21 is arranged on the outer side wall of the nozzle sleeve 2, and the third sealing ring 21 is used for sealing a gap between the nozzle sleeve 2 and an external device.

When the glue leaks to the second annular flange 45, the second sealing ring 471 is added, so that the glue is further prevented from leaking to an external device from the screwed joint of the nozzle head sleeve 4 and the nozzle core 1. The third sealing ring 21 is a leakage-proof protection device when the first sealing ring 461 and the second sealing ring 471 fail, and prevents leaked rubber from flowing back to the upper part of the nozzle core 1 to damage external devices.

According to a further technical scheme, the nozzle core 1 is provided with a fourth sealing ring 14, the fourth sealing ring 14 is located on the outer side wall of the bottom end of the nozzle core 1, and the fourth sealing ring 14 is used for sealing a gap between the outer side wall of the nozzle core 1 and the inner wall of the nozzle sleeve 2.

The gap between the nozzle core 1 and the nozzle sleeve 2 is sealed through the fourth sealing ring 14, the cooling liquid is prevented from flowing out of the cooling channel 13 to an external device, the cooling liquid is sealed in the cooling channel 13 between the nozzle core 1 and the nozzle sleeve 2 through the fourth sealing ring 14, and the cooling liquid is prevented from leaking.

According to the further technical scheme, the nozzle core 1 is provided with a five sealing ring 15, the five sealing ring 15 is located on the top end face of the nozzle core 1, and the five sealing ring 15 is used for sealing a gap between the nozzle core 1 and an external device.

When the sizing material flows into the sizing material channel 5 from the external device above the mouth core 1, the sealing ring five 15 can prevent the sizing material from leaking on the contact surface of the external device and the mouth core 1, so that the external device is damaged, and the waste of the sizing material is reduced.

All the technical features in the embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

Claims

1. The utility model provides a cold runner purt structure which characterized in that: comprises a mouth core (1), a mouth sleeve (2) sleeved outside the mouth core (1), a sizing material channel (5) arranged in the mouth core (1), a cooling device (3) arranged between the mouth core (1) and the mouth sleeve (2) and a mouth head sleeve (4) detachably connected with the mouth core (1); the cooling device (3) cools the rubber material in the rubber material channel (5); the mouth core (1) is provided with a contact end (11), the contact end (11) protrudes out of the mouth sleeve (2), the mouth head sleeve (4) is provided with a first annular flange (41) and a conical glue outlet channel (42), the first annular flange (41) is abutted against the end face of the contact end (11), and the first annular flange (41) protrudes out of the contact end (11) and is positioned below the mouth sleeve (2); the glue inlet of the glue outlet channel (42) is communicated with the glue outlet of the glue material channel (5), and the aperture of the communicated part of the glue outlet channel (42) and the glue material channel (5) is the largest.

2. A cold runner squirt nozzle structure as defined in claim 1, wherein: the cooling device (3) comprises a groove (12) formed by inwards recessing the outer side wall of the nozzle core (1), the groove (12) is spirally wound on the outer side wall of the nozzle core (1), and a cooling channel (13) is formed by surrounding the side wall of the groove (12) and the inner side wall of the nozzle sleeve (2).

3. A cold runner squirt nozzle structure as defined in claim 1, wherein: the nozzle head sleeve (4) is provided with a protruding end (43), and the protruding end (43) is arranged on one side, away from the abutting end (11), of the annular flange I (41).

4. A cold runner squirt nozzle structure as defined in claim 1, wherein: the mouth core (1) is provided with a threaded hole, and the mouth head sleeve (4) is provided with an external thread surface (44) in threaded connection with the threaded hole.

5. A cold runner squirt nozzle structure as defined in claim 4, wherein: the mouth head sleeve (4) is provided with a second annular flange (45), and the second annular flange (45) is arranged below the external thread surface (44).

6. A cold runner squirt nozzle structure as defined in claim 5, wherein: the nozzle head sleeve (4) is provided with a first clamping groove (46) and a first sealing ring (461) arranged on the first clamping groove (46), the first clamping groove (46) is positioned between the first annular flange (41) and the second annular flange (45), and the first sealing ring (461) is used for sealing a gap between the outer side wall of the nozzle head sleeve (4) and the inner wall of the nozzle core (1).

7. A cold runner squirt nozzle structure as defined in claim 1, wherein: the first annular flange (41) is provided with a second clamping groove (47) and a second sealing ring (471) installed on the second clamping groove (47), the second clamping groove (47) is located below the abutting end (11), and the second sealing ring (471) is used for sealing a gap between the first annular flange (41) and the abutting end (11).

8. A cold runner squirt nozzle structure as defined in claim 1, wherein: and a third sealing ring (21) is arranged on the outer side wall of the nozzle sleeve (2), and the third sealing ring (21) is used for sealing a gap between the nozzle sleeve (2) and an external device.

9. A cold runner squirt nozzle structure as defined in claim 1, wherein: the nozzle core (1) is provided with a fourth sealing ring (14), the fourth sealing ring (14) is located on the outer side wall of the bottom end of the nozzle core (1), and the fourth sealing ring (14) is used for sealing a gap between the outer side wall of the nozzle core (1) and the inner wall of the nozzle sleeve (2).

10. A cold runner squirt nozzle structure as defined in claim 1, wherein: the mouth core (1) is provided with a five sealing ring (15), the five sealing ring (15) is located on the top end face of the mouth core (1), and the five sealing ring (15) is used for sealing a gap between the mouth core (1) and an external device.