Hot nozzle head

Abstract

The utility model belongs to the technical field of injection molding, and discloses a hot nozzle head. According to the hot nozzle head, the first heat insulation cavity is formed between the hot nozzle core and the glue sealing cover, the second heat insulation cavity is defined by the outer wall of the heat insulation cap, the end of the glue sealing cover and the inner wall of the glue opening position, the first heat insulation cavity is communicated with the second heat insulation cavity, the bottom of the hot nozzle core is sleeved with the heat insulation cap, the heat insulation effect is achieved, heat loss is greatly reduced, and the service life of the hot nozzle head is prolonged. The hot nozzle core is arranged in the mold core, the fluidity of molten plastic is kept, cold material accumulation and cold material spot generation are prevented, the heat insulation cap is arranged between the hot nozzle core and the mold core, the heat insulation cap abuts against the mold core, the problem that the surface of a product is carbonized and scalded is solved, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a hot nozzle head. Background Art

[0002] In the injection molding process, the hot runner system is one of the important technologies widely used in the production of plastic products. The hot runner system continuously conveys the molten plastic to the mold cavity, so that the plastic remains fluid at high temperature and finally forms the required product.

[0003] As one of the core components of the hot runner system, the main function of the hot nozzle head is to guide the molten plastic from the hot runner to the mold cavity. However, in the molding production, the head of the hot nozzle head has fast heat conduction and serious heat loss. The head of the hot nozzle is prone to cold material, resulting in material accumulation at the gate position during product injection, poor valve needle sealing, and cold material spots at the gate position of the product after the cold material is carried out.

[0004] Therefore, there is an urgent need for a hot nozzle head to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hot nozzle head, which greatly reduces the heat loss of the hot nozzle head, maintains the fluidity of the molten plastic, prevents cold material accumulation and cold material spots, and avoids the problem of carbonization and scalding on the product surface, improving the quality of the product.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A hot nozzle head capable of cooperating with a mold core to seal glue. There is a gate position on the mold core. The hot nozzle head includes:

[0008] A hot nozzle body;

[0009] A hot nozzle core is arranged at the bottom end of the hot nozzle body, and at least part of the hot nozzle core extends out from the bottom end of the hot nozzle body;

[0010] A glue-sealing cover is sleeved on the hot nozzle core, and a first heat insulation chamber is arranged between at least part of the glue-sealing cover and the hot nozzle core;

[0011] A heat insulation cap is arranged at the bottom end of the hot nozzle core. The heat insulation cap can abut against the mold core, and a second heat insulation chamber is jointly formed by the outer wall of the heat insulation cap, the end of the glue-sealing cover and the inner wall of the gate position. The second heat insulation chamber is communicated with the first heat insulation chamber;

[0012] A valve needle is arranged in the hot nozzle body, and the head of the valve needle extends out from the hot nozzle core and the heat insulation cap.

[0013] Optionally, an assembly cavity is provided inside the heat insulation cap, and the assembly cavity has a smooth inner cavity wall that fits against the outer wall of the nozzle core.

[0014] Optionally, a positioning portion is provided at the bottom end of the sealant cover, and at least one annular positioning boss is provided on the outer peripheral surface of the positioning portion, and the annular positioning boss can abut against the inner wall of the gate position.

[0015] Optionally, two annular positioning bosses are provided at the bottom end of the sealant cover, and the two annular positioning bosses are arranged at intervals along the axial direction of the sealant cover.

[0016] Optionally, an assembly groove is provided at the bottom end of the nozzle body. The nozzle core is sleeved on the valve pin, and at least part of the nozzle core is located in the assembly groove. The sealant cover is sleeved outside the nozzle core, and at least part of the sealant cover is limited in the assembly groove.

[0017] Optionally, the sealant cover includes a limiting boss that can abut against the inner wall of the assembly groove.

[0018] Optionally, the sealant cover further includes an abutting boss that can abut against the end face of the assembly groove.

[0019] Optionally, a receiving cavity is provided on the inner wall of the nozzle body. The valve pin passes through the receiving cavity, and a first flow channel is formed between the outer wall of the valve pin and the inner wall of the receiving cavity. A second flow channel is formed between the valve pin and the nozzle core. A through hole and a discharge port are provided at the head of the valve pin. One end of the second flow channel communicates with the first flow channel, and the other end of the second flow channel communicates with the discharge port through the through hole.

[0020] Optionally, the nozzle head further includes a heater provided on the outer wall of the nozzle body, and the heater is used to heat the fluid in the first flow channel and the second flow channel.

[0021] Optionally, the nozzle head further includes a temperature sensing wire provided at one end of the nozzle body close to the head of the valve pin, and the temperature sensing wire is used to detect the temperature of the nozzle head.

[0022] Beneficial effects:

[0023] The hot nozzle tip provided by the present utility model has a first heat insulation chamber provided between the hot nozzle core and the sealant cover, and a second heat insulation chamber jointly enclosed by the outer wall of the heat insulation cap, the end of the sealant cover, and the inner wall of the gate position. The first heat insulation chamber and the second heat insulation chamber are connected. The heat insulation cap is sleeved at the bottom of the hot nozzle core, playing a role in heat insulation and heat preservation, greatly reducing heat loss, maintaining the fluidity of the molten plastic, preventing cold material accumulation and cold material spots, and also having a heat insulation cap arranged between the hot nozzle core and the mold core. The heat insulation cap abuts against the mold core, avoiding the problem of carbonization and scalding on the product surface and improving the product quality. Brief Description of the Drawings

[0024] Figure 1 It is a cross-sectional view of the hot nozzle tip provided by the present utility model.

[0025] In the figure:

[0026] 10. Mold core; 11. Gate position;

[0027] 100. Hot nozzle body; 110. First heat insulation chamber; 120. Second heat insulation chamber; 130. First runner; 140. Second runner;

[0028] 200. Hot nozzle core;

[0029] 300. Sealant cover; 310. Positioning part; 311. Annular positioning boss; 320. Limiting boss; 330. Abutting boss;

[0030] 400. Heat insulation cap;

[0031] 500. Valve needle; 510. Through hole; 520. Discharge port;

[0032] 600. Heater; 610. Temperature sensing wire. Detailed Description of the Specific Embodiment

[0033] The following further details the present utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment provides a hot nozzle head, which can cooperate with the mold core 10 to seal the glue. A glue gate position 11 is provided on the mold core 10. As Figure 1 shown, the hot nozzle head includes a hot nozzle body 100, a hot nozzle core 200, a glue sealing cover 300, a heat insulation cap 400 and a valve pin 500. The hot nozzle core 200 is arranged at the bottom end of the hot nozzle body 100, and at least part of the hot nozzle core 200 extends out from the bottom end of the hot nozzle body 100. The glue sealing cover 300 is sleeved on the hot nozzle core 200, and a first heat insulation chamber 110 is provided between at least part of the glue sealing cover 300 and the hot nozzle core 200. The heat insulation cap 400 is arranged at the bottom end of the hot nozzle core 200. The heat insulation cap 400 can abut against the mold core 10, and a second heat insulation chamber 120 is jointly formed by the outer wall of the heat insulation cap 400, the end of the glue sealing cover 300 and the inner wall of the glue gate position 11. The second heat insulation chamber 120 is communicated with the first heat insulation chamber 110. The valve pin 500 is arranged in the hot nozzle body 100, and the head of the valve pin 500 extends out from the hot nozzle core 200 and the heat insulation cap 400, and is used for injecting the molten plastic into the cavity of the mold core 10.

[0038] In the hot nozzle tip of this embodiment, a first heat insulation chamber 110 is provided between the hot nozzle core 200 and the sealant cover 300, and a second heat insulation chamber 120 is jointly formed by the outer wall of the heat insulation cap 400, the end of the sealant cover 300, and the inner wall of the gate position 11. The first heat insulation chamber 110 and the second heat insulation chamber 120 are communicated. The heat insulation cap 400 is sleeved at the bottom of the hot nozzle core 200, which plays a role in heat insulation and heat preservation, greatly reduces heat loss, maintains the fluidity of the molten plastic, prevents cold material accumulation and cold material spots from occurring, and a heat insulation cap 400 is provided between the hot nozzle core 200 and the mold core 10. The heat insulation cap 400 abuts against the mold core 10, avoiding the problem of carbonization and scalding on the product surface and improving the quality of the product.

[0039] Optionally, as Figure 1 shown, an assembly cavity is provided inside the heat insulation cap 400. The assembly cavity has a smooth inner cavity wall, and the inner cavity wall fits on the outer wall of the hot nozzle core 200. In this embodiment, the contour of the inner cavity wall conforms to the hot nozzle core 200, with better heat preservation effect, reducing the heat loss of the hot nozzle core 200. When the valve pin 500 is opened for injection again, the cold material at the head of the valve pin 500 is lower than the material temperature inside the hot nozzle body 100, and when the valve pin 500 is opened, the molten plastic within 0.25 mm on one side of the head is driven to flow back by the internal suction force, avoiding the accumulation of cold material at the gate position 11 and affecting the sealing of the valve pin 500, solving the problem of the product turning yellow and black, and at the same time, there is no problem of carbonization and scalding on the product surface, further improving the appearance quality of the product.

[0040] Optionally, as Figure 1 shown, a positioning portion 310 is provided at the bottom end of the sealant cover 300. At least one annular positioning boss 311 is provided on the outer peripheral surface of the positioning portion 310. The annular positioning boss 311 can abut against the inner wall of the gate position 11, ensuring accurate alignment when the sealant cover 300 is docked with the gate position 11, avoiding deviation or misalignment during the sealing process, improving the accuracy and reliability of sealing, and reducing the situation of glue leakage or poor sealing.

[0041] Optionally, two annular positioning bosses 311 are provided at the bottom end of the sealant cover 300. The two annular positioning bosses 311 are arranged at intervals along the axial direction of the sealant cover 300, forming a double positioning between the sealant cover 300 and the inner wall of the gate position 11, making the sealant cover 300 more stable.

[0042] Optionally, an assembly groove is provided at the bottom end of the hot nozzle body 100. The hot nozzle core 200 is sleeved on the valve pin 500, and at least part of the hot nozzle core 200 is located in the assembly groove. The sealant cover 300 is sleeved outside the hot nozzle core 200, and at least part of the sealant cover 300 is limited in the assembly groove, thereby limiting the hot nozzle core 200 in the assembly groove. The position of the hot nozzle core 200 is effectively fixed, preventing displacement or loosening during the sealing process, ensuring the stability of the hot nozzle core 200 during use, and improving the sealing accuracy and the molding quality of the product.

[0043] Optionally, the encapsulation cover 300 includes a limiting boss 320, and the limiting boss 320 can abut against the inner wall of the assembly groove, so as to prevent the encapsulation cover 300 from coming out of the assembly groove.

[0044] Optionally, the encapsulation cover 300 further includes an abutting boss 330, and the abutting boss 330 can abut against the end face of the assembly groove, avoiding the over-insertion of the encapsulation cover 300 into the assembly groove during installation, and ensuring that the installation position of the encapsulation cover 300 is more accurate.

[0045] Optionally, as Figure 1 shown, the inner wall of the hot nozzle body 100 is provided with a receiving cavity, the valve pin 500 is inserted through the receiving cavity, and a first flow channel 130 is formed between the outer wall of the valve pin 500 and the inner wall of the receiving cavity. A second flow channel 140 is formed between the valve pin 500 and the hot nozzle core 200. The head of the valve pin 500 is provided with a through hole 510 and a discharge port 520. One end of the second flow channel 140 is communicated with the first flow channel 130, and the other end of the second flow channel 140 is communicated with the discharge port 520 through the through hole 510, so that the molten plastic can be more efficiently transported inside the hot nozzle head, ensuring that the molten plastic can uniformly flow into the mold cavity, and improving the injection molding efficiency and product quality.

[0046] Optionally, as Figure 1 shown, the hot nozzle head further includes a heater 600, and the heater 600 is arranged on the outer wall of the hot nozzle body 100. The heater 600 is used to heat the fluid in the first flow channel 130 and the second flow channel 140. The heater 600 provides continuous heat supplement for the hot nozzle head, ensuring that the molten plastic in the first flow channel 130 and the second flow channel 140 maintains an appropriate high temperature state, and effectively avoiding the problems of solidification or weakened fluidity of the plastic caused by temperature reduction during the flow process.

[0047] Optionally, the hot nozzle head further includes a temperature sensing wire 610, and the temperature sensing wire 610 is arranged at one end of the hot nozzle body 100 close to the head of the valve pin 500. The temperature sensing wire 610 is used to detect the temperature of the hot nozzle head. The temperature sensing wire 610 can monitor the temperature of the hot nozzle head in real time, provide accurate temperature data, help dynamically adjust the working state of the heater 600, ensure that the molten plastic flows within the optimal temperature range, and improve the quality of the product after molding.

[0048] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. The hot nozzle can cooperate with the mold core (10) to seal the glue, and a glue port position (11) is provided on the mold core (10), and it is characterized in that, The hot nozzle head includes: A hot nozzle body (100); A hot nozzle core (200), which is arranged at the bottom end of the hot nozzle body (100), and at least part of the hot nozzle core (200) extends out from the bottom end of the hot nozzle body (100); A sealant cover (300), which is sleeved on the hot nozzle core (200), and a first heat insulation chamber (110) is provided between at least part of the sealant cover (300) and the hot nozzle core (200); A heat insulation cap (400), which is arranged at the bottom end of the hot nozzle core (200), the heat insulation cap (400) can be in contact with the mold core (10), and a second heat insulation chamber (120) is jointly formed by the outer wall of the heat insulation cap (400), the end of the sealant cover (300) and the inner wall of the gate position (11), and the second heat insulation chamber (120) is communicated with the first heat insulation chamber (110); A valve pin (500), which is arranged in the hot nozzle body (100), and the head of the valve pin (500) extends out from the hot nozzle core (200) and the heat insulation cap (400).

2. The hot nozzle according to claim 1, characterized in that, An assembly cavity is provided inside the heat insulation cap (400), the assembly cavity has a smooth inner cavity wall, and the inner cavity wall fits on the outer wall of the hot nozzle core (200).

3. The hot nozzle head according to claim 1, characterized in that, A positioning part (310) is provided at the bottom end of the sealant cover (300), and at least one annular positioning boss (311) is provided on the outer peripheral surface of the positioning part (310), and the annular positioning boss (311) can be in contact with the inner wall of the gate position (11).

4. The hot nozzle according to claim 3, characterized in that, Two annular positioning bosses (311) are provided at the bottom end of the sealant cover (300), and the two annular positioning bosses (311) are arranged at intervals along the axial direction of the sealant cover (300).

5. The hot nozzle according to claim 1, characterized in that, An assembly groove is provided at the bottom end of the hot nozzle body (100), the hot nozzle core (200) is sleeved on the valve pin (500), and at least part of the hot nozzle core (200) is located in the assembly groove, the sealant cover (300) is sleeved outside the hot nozzle core (200), and at least part of the sealant cover (300) is limited in the assembly groove.

6. The hot nozzle head according to claim 5, characterized in that, The sealant cover (300) includes a limiting boss (320), and the limiting boss (320) can be in contact with the inner wall of the assembly groove.

7. The hot nozzle according to claim 5, characterized in that, The sealant cover (300) further includes an abutting boss (330), and the abutting boss (330) can be in contact with the end face of the assembly groove.

8. The hot nozzle head according to claim 1, characterized in that, A receiving cavity is provided on the inner wall of the hot nozzle body (100), the valve pin (500) passes through the receiving cavity, and a first flow channel (130) is formed between the outer wall of the valve pin (500) and the inner wall of the receiving cavity. A second flow channel (140) is formed between the valve pin (500) and the hot nozzle core (200). A through hole (510) and a discharge port (520) are provided at the head of the valve pin (500). One end of the second flow channel (140) is communicated with the first flow channel (130), and the other end of the second flow channel (140) is communicated with the discharge port (520) through the through hole (510).

9. The hot nozzle according to claim 8, characterized in that, The hot nozzle tip further includes a heater (600), the heater (600) is disposed on the outer wall of the hot nozzle body (100), and the heater (600) is used to heat the fluid in the first flow channel (130) and the second flow channel (140).

10. The hot nozzle head according to claim 9, characterized in that The hot nozzle tip further includes a temperature sensing wire (610), the temperature sensing wire (610) is disposed at one end of the hot nozzle body (100) close to the head of the valve needle (500), and the temperature sensing wire (610) is used to detect the temperature of the hot nozzle tip.

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