CN220219507U

CN220219507U - Nozzle and silica gel injection mold based on 3D prints

Info

Publication number: CN220219507U
Application number: CN202321817831.9U
Authority: CN
Inventors: 张占波; 拉周加; 王利军
Original assignee: Shanghai Yisu Laser Technology Co ltd
Current assignee: Shanghai Yisu Laser Technology Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2023-12-22
Anticipated expiration: 2033-07-11

Abstract

The utility model provides a nozzle based on 3D printing and a silica gel injection mold, and belongs to the technical field of silica gel molds, wherein the nozzle based on 3D printing comprises a nozzle body, the nozzle body comprises a feeding end and a discharging end, the nozzle body is provided with a feeding channel extending from the feeding end to the discharging end, a conformal waterway is arranged in the nozzle body around the feeding channel, and the conformal waterway is provided with a water inlet and a water outlet; the shape-following waterway comprises an annular waterway, and the annular waterway is coaxially arranged in the nozzle body near the discharge end. According to the nozzle based on 3D printing, the cooling path of cooling water near the discharge end is increased to cool 360 degrees, the temperature in the discharge end area is reduced by 20 degrees compared with that of a nozzle of a traditional waterway, the annular waterway can be maximally close to the discharge end area, the silica gel near the discharge end area is free from solidification risk, and the quality of a mass-produced product is ensured.

Description

Nozzle and silica gel injection mold based on 3D prints

Technical Field

The utility model relates to the technical field of silica gel molds, in particular to a nozzle based on 3D printing and a silica gel injection mold.

Background

The silica gel injection mold is widely applied to the processing industry of plastic products, is a tool for producing plastic products, and is also a tool for endowing the products with complete structures and precise dimensions. The principle of silica gel injection molding is that a cooling system is adopted, liquid silica gel is kept at about 40 ℃, after entering a mold cavity through injection molding, under the action of mold cavity heating (90-210 degrees), silica gel is solidified to form a silica gel product, and the nozzle of a silica gel mold must have a stable and good cooling effect due to the irreversible characteristic of the liquid silica gel.

At present, the nozzle is generally cooled by arranging a cooling water channel, however, the existing water channel cannot be close to the die core, so that the cooling of a nozzle gate area is insufficient, silica gel in a gel gate area is easily solidified after being influenced by the temperature of the die core, and continuous production cannot be performed.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defect of insufficient cooling of a nozzle gate area in the prior art, so as to provide a nozzle based on 3D printing and a silica gel injection mold.

In order to solve the above technical problems, the present utility model provides a nozzle based on 3D printing, comprising:

the nozzle body comprises a feeding end and a discharging end, the nozzle body is provided with a feeding channel extending from the feeding end to the discharging end, a conformal waterway is arranged in the nozzle body around the feeding channel, and the conformal waterway is provided with a water inlet and a water outlet;

the shape-following waterway comprises an annular waterway, and the annular waterway is coaxially arranged in the nozzle body near the discharge end.

Optionally, the water inlet and the water outlet of the conformal waterway are both close to the feeding end of the nozzle body.

Optionally, the conformal waterway further comprises:

one end of the first waterway is a water inlet, and the other end of the first waterway is communicated with an inlet of the annular waterway;

and one end of the second waterway is a water outlet, the other end of the second waterway is communicated with the outlet of the annular waterway, and the inlet and the outlet are arranged at two ends of one side end face of the annular waterway away from the discharge end.

Optionally, the first waterway and the second waterway are spiral structures.

Optionally, the sections of the first waterway and the second waterway are waist-shaped structures.

Optionally, along the direction from the feeding end to the discharging end, the spiral structures of the first waterway and the second waterway are from sparse to dense.

Optionally, the first waterway and the second waterway are spirally and symmetrically arranged along the central axis of the feeding channel.

Optionally, the height dimension D1 of the annular waterway is smaller than the cross-sectional length dimension D2 of the first waterway, and the waterway width dimension D3 of the annular waterway is consistent with the cross-sectional width dimension D4 of the first waterway.

Optionally, the cross-sectional area of the feed channel near the discharge end is gradually reduced from the feed end to the discharge end.

The utility model also provides a silica gel injection mold, which comprises the 3D printing-based nozzle and a mold body, wherein the mold body is provided with a nozzle mounting cavity, and a water inlet waterway and a water outlet waterway are arranged on the mold body;

the nozzle body is arranged in the nozzle mounting cavity, the water inlet is connected with the water inlet waterway, and the water outlet is connected with the water outlet waterway;

at least one set of seals is disposed between the outer sidewall of the nozzle body and the nozzle mounting cavity proximate the feed end.

The technical scheme of the utility model has the following advantages:

1. the 3D printing-based nozzle provided by the utility model comprises a nozzle body, wherein a feeding channel is arranged in the nozzle body, a shape-following waterway is arranged in the nozzle body around the feeding channel, the shape-following waterway comprises an annular waterway, the annular waterway is arranged in the nozzle body close to a discharge end, the cooling path of cooling water at the position close to the discharge end is increased by the arrangement of the annular waterway, 360-degree cooling is performed, the temperature in the discharge end area is reduced by 20 degrees compared with that of a nozzle of a traditional waterway, the annular waterway can be maximally close to the discharge end area, the silica gel close to the discharge end area is free from solidifying risk, and the quality of mass produced products is ensured.

The nozzle is manufactured through a 3D printing technology, is integrally arranged, is good in sealing performance, can not have leakage, enables the temperature balance of the nozzle body to be better along with the arrangement of the shape waterway, can be controlled to be +/-3 degrees, is used for 3D printing, reduces the subsequent process of independently processing the waterway on a substrate, simplifies the machining process, and reduces the machining cost.

2. According to the nozzle based on 3D printing, the water inlet and the water outlet of the conformal waterway are close to the feeding end of the nozzle body, and the cooling water flows downwards and upwards after entering the conformal waterway, so that a cooling path is increased, and the cooling effect of the nozzle is improved.

3. The nozzle based on 3D printing provided by the utility model comprises the first waterway and the second waterway, wherein the first waterway is used as a water inlet pipeline, the second waterway is used as a water outlet pipeline, cooling water enters the annular waterway after passing through the first waterway and then is sent out through the second waterway, so that a circulation path is increased, the first waterway and the second waterway are correspondingly arranged according to the cooling waterway, the temperature balance and the cooling efficiency are improved, and the quality of liquid silica gel is ensured.

4. According to the nozzle based on 3D printing, the first waterway and the second waterway are of the spiral structures, the corresponding spiral structures can be customized by adopting 3D printing, and the arrangement of the spiral structures achieves integral cooling and enables cooling to be balanced.

5. According to the 3D printing-based nozzle provided by the utility model, the sections of the first waterway and the second waterway are of the kidney-shaped structures, and compared with the circular or oval structures, the section of the kidney-shaped structures is larger, so that the cooling area is increased, and the cooling effect is good.

6. According to the 3D printing-based nozzle provided by the utility model, the spiral structures of the first waterway and the second waterway are from sparse to dense along the direction from the feeding end to the discharging end, and the temperature is higher under the influence of the high temperature of the die core as the spiral structures are closer to the discharging end area, so that the area with higher temperature is cooled for a longer time from sparse to dense, and the balance of the whole temperature is ensured.

7. According to the 3D printing-based nozzle provided by the utility model, the first waterway and the second waterway are spirally and symmetrically arranged along the central axis of the feeding channel, so that cooling is balanced, and the phenomenon that liquid silica gel has temperature difference in the conveying process to influence subsequent solidification is avoided.

8. According to the nozzle based on 3D printing, the height dimension D1 of the annular waterway is smaller than the section length dimension D2 of the first waterway, the waterway width dimension D3 of the annular waterway is consistent with the section width dimension D4 of the first waterway, so that cooling water can be fully pressed into the second waterway after entering the annular waterway from the first waterway, and if the height dimension of the annular waterway is too high, the cooling water entering the annular waterway is retained at the bottom end of the annular waterway, and the local cooling is affected.

9. According to the silica gel injection mold provided by the utility model, the nozzle body is arranged in the nozzle mounting cavity in the mold body, and at least one group of sealing elements are arranged between the outer side wall of the nozzle body close to the feeding end and the nozzle mounting cavity, so that water is prevented from seeping into the nozzle body and the nozzle mounting cavity, and the use effect of the mold is prevented from being influenced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a cooling structure of a nozzle in the prior art;

FIG. 2 is a schematic structural view of one embodiment of a 3D printing-based nozzle provided in an embodiment of the present utility model;

FIG. 3 is a schematic view of the internal structure of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 2 in one direction;

FIG. 5 is a schematic view of a cross-sectional structure in another direction in FIG. 2;

FIG. 6 is a schematic cross-sectional view of the third direction in FIG. 2;

fig. 7 is a schematic structural diagram of a silica gel injection mold provided in this embodiment.

Reference numerals illustrate:

1. a nozzle body; 2. a feed end; 3. a discharge end; 4. a feed channel; 5. a conformal waterway; 6. a water inlet; 7. a water outlet; 8. an annular waterway; 9. a first waterway; 10. a second waterway; 11. an inlet; 12. an outlet; 13. a die body; 14. a nozzle mounting cavity; 15. a water inlet waterway; 16. a water outlet waterway; 17. and a seal.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The cooling of traditional mode to the nozzle generally adopts traditional water route, sets up the shell in the outside of nozzle body, sets up annular water route between nozzle body and the shell, sets up the baffle between the water route, separates annular water route into semi-annular water route, and the both sides water route UNICOM of baffle bottom, the semi-annular water route of entering side is followed from the semi-annular water route of bottom entering opposite side after the semi-annular water route of one side to the water inlet, then flows from the delivery port, accomplishes the cooling to the nozzle.

In traditional water route, water circulates in semi-annular water route, and circulation area is big, appears regional flow easily, and the mid portion promptly is fast, and both sides velocity of flow is slow even not flows, leads to appearing local high temperature or the condition that local temperature is too low, influences the water route equilibrium and the temperature of silica gel is inconsistent, and traditional water route is not enough to the cooling of nozzle runner regional, leads to the silica gel in glue mouth region to receive the mould benevolence temperature influence postcuring easily, can not carry out continuous production.

The nozzle based on 3D printing that this embodiment provided is installed in silica gel injection mold, and liquid silica gel passes through the nozzle and gets into in the mould die cavity.

As shown in fig. 2 and 3, a specific implementation manner of the 3D printing-based nozzle provided in this embodiment includes a nozzle body 1, where the nozzle body 1 includes a feed end 2 and a discharge end 3, the nozzle body 1 has a feed channel 4 extending from the feed end 2 to the discharge end 3, a conformal waterway 5 is disposed around the feed channel 4 in the nozzle body 1, and the conformal waterway 5 has a water inlet 6 and a water outlet 7; the conformal waterway 5 comprises an annular waterway 8, and the annular waterway 8 is coaxially arranged in the nozzle body 1 near the discharge end 3. The setting of annular water route 8 has increased the cooling water and has been being close to the cooling route of discharge end 3 department, carries out 360 degrees cooling, and the temperature in discharge end region has reduced 20 degrees than the nozzle in traditional water route, and annular water route 8 can furthest accomplish to be close to the 3 regions in discharge end, lets the silica gel that is close to the 3 regions in discharge end have not solidified risk, guarantees the product quality of mass production.

The nozzle is manufactured through a 3D printing technology, the nozzle body 1 is of an integrated structure, the sealing performance is good, leakage is avoided, the temperature balance of the nozzle body 1 is better due to the arrangement of the shape waterway 5, the overall temperature balance can be controlled to be +/-3 ℃, the 3D printing is used, the subsequent process of independently processing the waterway on a substrate is reduced, the machining process is simplified, and the machining cost is reduced.

As shown in fig. 2 and fig. 3, the 3D printing-based nozzle provided in this embodiment has the water inlet 6 and the water outlet 7 of the conformal waterway 5 both near the feed end 2 of the nozzle body 1, and the cooling water flow enters the conformal waterway 5 and then flows downwards and flows upwards, so that a cooling path is increased, and the cooling effect of the nozzle is improved.

As shown in fig. 3, the 3D printing-based nozzle provided in this embodiment further includes a first waterway 9 and a second waterway 10, one end of the first waterway 9 is a water inlet 6, and the other end of the first waterway 9 is communicated with an inlet 11 of the annular waterway 8; one end of the second waterway 10 is a water outlet 7, the other end of the second waterway 10 is communicated with an outlet 12 of the annular waterway 8, and the inlet 11 and the outlet 12 are arranged at two ends of one side end surface of the annular waterway 8, which is far away from the discharge end 3. The first water path 9 is used as a water inlet pipeline, the second water path 10 is used as a water outlet pipeline, cooling water enters the annular water path 8 after passing through the first water path 9, and then is sent out through the second water path 10, so that a circulating path is increased, the first water path 9 and the second water path 10 are correspondingly arranged according to the cooling water path, the temperature balance and the cooling efficiency are improved, and the quality of liquid silica gel is guaranteed. Wherein, the size of the cross section of the first waterway 9 is consistent with the size of the inlet 11, the size of the cross section of the second waterway 10 is consistent with the size of the outlet 12, and the pressure loss is reduced.

As shown in fig. 3, the nozzle based on 3D printing provided in this embodiment has a spiral structure of the first waterway 9 and the second waterway 10. Adopt 3D to print, can customize corresponding spiral structure, spiral structure's setting has reached whole cooling for the cooling is balanced.

As shown in fig. 3 to 6, the cross sections of the first waterway 9 and the second waterway 10 of the nozzle based on 3D printing provided in this embodiment are waist-shaped structures. Compared with a round or oval structure, the cross section of the kidney-shaped structure is larger, the cooling area is increased, the cooling effect is good, and the cross sections of the first water channel 9 and the second water channel 10 can be of other types of strip-shaped structures.

According to the nozzle based on 3D printing provided by the embodiment, along the direction from the feeding end 2 to the discharging end 3, the spiral structures of the first waterway 9 and the second waterway 10 are from sparse to dense. The temperature is higher under the influence of the high temperature of the die core, so that the region with higher temperature is cooled for a longer time from the arrangement of being sparse to dense, and the balance of the whole temperature is ensured.

As shown in fig. 3, the nozzle based on 3D printing provided in this embodiment is a first waterway 9 and the second waterway 10 that are symmetrically arranged along the central axis of the feeding channel 4. The cooling is balanced, and the phenomenon that the liquid silica gel has temperature difference to influence the subsequent solidification in the conveying process is avoided.

The nozzle based on 3D printing that this embodiment provided, the height dimension D1 of annular waterway 8 is less than the cross-section length dimension D2 of first waterway 9, the waterway width dimension D3 of annular waterway 8 is unanimous with the cross-section width dimension D4 of first waterway 9.

As shown in fig. 5, D3 in the drawing is the water channel width dimension of the annular water channel 8, D4 in the drawing is the cross-sectional width dimension of the first water channel 9, and the dimensions of D3 and D4 are identical, so that too much pressure dispersion and pressure loss do not occur when cooling water enters the annular water channel 8 from the first water channel 9, regional flow is avoided, and water flow transmission is smoother; as shown in fig. 6, D1 in the drawing is the height dimension of the annular waterway 8, D2 in the drawing is the cross-sectional length dimension of the first waterway 9, and D1 is smaller than D2, so that cooling water can be completely flushed into the second waterway 10 after entering the annular waterway 8 from the first waterway 9, and if the height dimension D1 of the annular waterway 8 is too high, the cooling water entering the annular waterway 8 is retained at the bottom end of the annular waterway 8, thereby affecting local cooling. Specifically, the D1 size is one half of the D2 size.

As shown in fig. 4 and 5, the 3D printing-based nozzle provided in this embodiment is close to the cross-sectional area of the feeding channel 4 of the discharging end 3, from the feeding end 2 to the discharging end 3, gradually reduces, and improves the discharging pressure of the discharging end 3, so as to facilitate the delivery of the liquid silica gel.

As shown in fig. 7, this embodiment further provides a silicone injection mold, including the 3D printing-based nozzle and the mold body 13 according to any one of the above embodiments, where the mold body 13 has a nozzle mounting cavity 14, and the mold body 13 is provided with a water inlet channel 15 and a water outlet channel 16; the nozzle body 1 is arranged in the nozzle mounting cavity 14, the water inlet 6 is connected with the water inlet waterway 15, and the water outlet 7 is connected with the water outlet waterway 16; at least one set of seals 17 is provided between the outer side wall of the nozzle body 1 and the nozzle mounting cavity 14 near the feed end 2. Water is prevented from seeping into the nozzle body 1 and the nozzle mounting cavity 14, and the use effect of the die is prevented from being affected.

Cooling water enters the first waterway 9 after passing through the water inlet waterway 15, passes through the first waterway 9, the annular waterway 8 and the second waterway 10 in sequence, and then is sent out from the water outlet waterway 16, and the cooling water circulates in the shape-following waterway 5 to cool the liquid silica gel in the feed channel 4 in the nozzle body 1, so that the solidification of the silica gel after the temperature rise is avoided, and the subsequent continuous production is influenced.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. A 3D printing-based nozzle, comprising:

the nozzle body (1) comprises a feeding end (2) and a discharging end (3), the nozzle body (1) is provided with a feeding channel (4) extending from the feeding end (2) to the discharging end (3), a conformal waterway (5) is arranged in the nozzle body (1) around the feeding channel (4), and the conformal waterway (5) is provided with a water inlet (6) and a water outlet (7);

the conformal waterway (5) comprises an annular waterway (8), and the annular waterway (8) is close to the discharge end (3) and is coaxially arranged in the nozzle body (1).

2. 3D printing based nozzle according to claim 1, characterized in that the water inlet (6) and the water outlet (7) of the conformal waterway (5) are both close to the feed end (2) of the nozzle body (1).

3. 3D printing-based nozzle according to claim 1 or 2, characterized in that the conformal waterway (5) further comprises:

one end of the first waterway (9) is provided with a water inlet (6), and the other end of the first waterway is communicated with an inlet (11) of the annular waterway (8);

and one end of the second waterway (10) is a water outlet (7), the other end of the second waterway is communicated with an outlet (12) of the annular waterway (8), and the inlet (11) and the outlet (12) are arranged at two ends of one side end surface of the annular waterway (8) away from the discharge end (3).

4. A 3D printing based nozzle according to claim 3, characterized in that the first waterway (9) and the second waterway (10) are of spiral structure.

5. 3D printing based nozzle according to claim 4, characterized in that the cross section of the first waterway (9) and the second waterway (10) is of kidney-shaped structure.

6. 3D printing based nozzle according to claim 5, characterized in that the spiral structure of the first waterway (9) and the second waterway (10) is from sparse to dense in the direction of the feed end (2) to the discharge end (3).

7. A 3D printing based nozzle according to claim 3, characterized in that the first waterway (9) and the second waterway (10) are arranged helically symmetrical along the central axis of the feed channel (4).

8. 3D printing based nozzle according to claim 7, characterized in that the height dimension D1 of the annular waterway (8) is smaller than the cross-sectional length dimension D2 of the first waterway (9), the waterway width dimension D3 of the annular waterway (8) being identical to the cross-sectional width dimension D4 of the first waterway (9).

9. 3D printing based nozzle according to claim 1, characterized in that the cross-sectional area of the feed channel (4) near the discharge end (3) tapers from the feed end (2) to the discharge end (3).

10. A silica gel injection mold, characterized by comprising the 3D printing-based nozzle and a mold body (13) according to any one of claims 1-9, wherein the mold body (13) is provided with a nozzle mounting cavity (14), and a water inlet waterway (15) and a water outlet waterway (16) are arranged on the mold body (13);

the nozzle body (1) is arranged in the nozzle mounting cavity (14), the water inlet (6) is connected with the water inlet waterway (15), and the water outlet (7) is connected with the water outlet waterway (16);

at least one set of seals (17) is arranged between the outer side wall of the nozzle body (1) near the feed end (2) and the nozzle mounting cavity (14).