Spray nozzle device for positioning shell

Abstract

The invention discloses a shell positioning nozzle device which comprises a nozzle, the nozzle comprises a nozzle body, a nozzle head, a nozzle head jacket, a heating element and a sealing shell, a flow channel area facilitating circulation of plastic liquid is arranged in the nozzle body, and the nozzle head is arranged at the lower end of the nozzle body; a nozzle head outer sleeve is arranged on the outer side of the nozzle head, and the nozzle head outer sleeve is connected with the nozzle body through a thread structure. By optimizing the structure of the sealing shell, the sealing shell is shortened, the machining precision is improved, the problems of over-temperature decomposition and the like of injection molding high-temperature engineering plastics in the using process are solved, and the problems of high sprue, cold materials, poor appearance of plastic products and the like of the injection molding high-temperature engineering plastics are solved; therefore, the problems of over-temperature decomposition of the injection molding high-temperature engineering plastic, high pouring gate of the injection molding high-temperature engineering plastic, poor appearance of cold materials and plastic products and the like are solved in the use process.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and particularly to a nozzle device for housing positioning. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool for giving plastic products a complete structure and precise dimensions. An injection mold is also a processing method used when mass-producing parts, mainly applied in the industrial field. The injection mold process is to inject the heat-melted material into the mold cavity under high pressure, and after cooling and solidifying, a formed product is obtained; it is divided into two types according to the forming characteristics: thermosetting plastic molds and thermoplastic plastic molds. The nozzle plays a key role in the plastic injection molding process and has various functional forms. The following are the main functions and common types of nozzles:

[0003] Functions of the nozzle:

[0004] 1. Pre-plasticizing stage: The nozzle helps to establish back pressure and discharge gas, thereby preventing the molten material from drooling and improving the plasticizing quality.

[0005] 2. Injection stage: The nozzle is in close contact with the main sprue of the mold to ensure that the molten material does not overflow, and at the same time establish the melt pressure, increase the injection speed, and enhance the mixing effect.

[0006] 3. Pressure-holding stage: The nozzle facilitates the replenishment of molten material into the mold.

[0007] 4. Temperature control function: The nozzle can adjust the temperature, keep the temperature of the molten material stable, and can cut off the flow of the molten material when needed.

[0008] The existing nozzle structure is mostly composed of a body 101, a nozzle head 102, a fixed outer sleeve 103, a heating element, and a positioning seal housing 108. In part production, due to the length limitation of the positioning seal housing 108, processing is difficult, the processing accuracy is difficult to guarantee, the scrap rate of part products increases, the production cost increases, and the production efficiency is affected. And due to its own length and the limitation of the heating element, the heat balance of the nozzle flow channel area is lost, the flow channel temperature exceeds the set temperature, and the injection of high-temperature engineering plastics overheats and decomposes, etc. Summary of the Invention

[0009] In order to solve the above existing problems, the present application provides a nozzle device for housing positioning, adopting the following technical solutions:

[0010] A nozzle device with shell positioning, including a nozzle, which consists of a nozzle body, a nozzle head, a nozzle head outer sleeve, a heating element, and a sealing shell. A flow channel area for facilitating the flow of plastic liquid is arranged inside the nozzle body, and a nozzle head is arranged at the lower end of the nozzle body. A nozzle head outer sleeve is arranged outside the nozzle head, and the nozzle head outer sleeve is connected to the nozzle body through a threaded structure. A heating element is arranged outside the nozzle head outer sleeve, and the outside of the heating element is arranged inside the sealing shell. The sealing shell wraps around the connection between the nozzle body and the nozzle head, and a sealed cavity is formed between the sealing shell and the nozzle body.

[0011] Furthermore, the heating element includes a heater and a heating thermocouple. The heater is set as an annular heater, and the heating end of the heating thermocouple is arranged on one side of the heater.

[0012] By adopting the above technical solution, the combined double heating structure of the heater and the heating thermocouple can be more precise during temperature adjustment control, and the temperature control of the heating thermocouple is more precise. Moreover, it can independently adjust the heating power of different heaters according to the temperature feedback of the nozzle orifice, avoiding temperature loss or overheating.

[0013] Furthermore, the heater is wrapped and fitted on the outside of the nozzle sleeve, and the heating end of the heating thermocouple is embedded into the outer circle of the nozzle sleeve.

[0014] Furthermore, a nozzle ring sleeve is arranged at the position where the nozzle head extends out of the sealing shell, and the nozzle ring sleeve is connected to the outside of the nozzle head through a threaded structure.

[0015] Furthermore, the outside of the nozzle ring sleeve also includes a temperature measuring component for sensing the temperature of the nozzle ring.

[0016] Furthermore, a shell positioning platform is arranged at the top of the sealing shell, and a shell fixing ring matching the shell positioning platform is arranged on the nozzle body. The fixing ring is used to limit the movement of the sealing shell.

[0017] By adopting the above technical solution, during the use process, the fixing ring can also be used to limit the overall nozzle structure so that it is engaged with the gate position on the mold to avoid misalignment during the injection molding process and affect the use.

[0018] Furthermore, the sealing shell is divided into an inner wall and an outer wall, and there is an air isolation layer in the middle.

[0019] By adopting the above technical solution, the air isolation layer improves the temperature storage capacity of the nozzle body, and at the same time, the gate area achieves a heat preservation effect.

[0020] Furthermore, a valve needle is arranged inside the nozzle body, and the valve needle is arranged in the flow channel area.

[0021] Further, the set length of the outer sleeve of the sealing shell and the sealing outer shell is shorter than the depth of the injection molding groove, and the sealing outer shell and the sealing height are offset towards the rear end of the nozzle body.

[0022] Further, the nozzle head is set in a stepped shape, and a stepped platform adapted to the shape of the nozzle head is arranged inside the outer sleeve of the nozzle head.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In the present invention, by optimizing the structure of the sealing outer shell and minimizing it, the processing accuracy is improved, and problems such as over-temperature decomposition of injection-molded high-temperature engineering plastics during use are solved, and problems such as high gate, cold material, and poor appearance of plastic products of injection-molded high-temperature engineering plastics are solved;

[0025] 1. A dual heating structure is provided. During use, the combination of the heater and the heating thermocouple in the dual heating structure can make the temperature control more accurate during re-temperature control. Moreover, the temperature control of the heating thermocouple is more accurate, and the heating power of different heaters can be independently adjusted according to the temperature feedback at the nozzle port to avoid temperature loss or over-temperature;

[0026] 2. The temperature storage capacity of the nozzle structure is improved, and the problem that the temperature in the runner exceeds the set stable over-temperature decomposition due to the long overall length of the nozzle itself and the limitation of the heating element is solved. The sealing and limiting effects are achieved by using a fixing ring with a limiting effect;

[0027] 3. The nozzle head is provided with internal and external thread structures, which are convenient for combination and installation during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of a traditional nozzle provided in the background art;

[0030] Figure 2 is a schematic structural diagram of Embodiment 1 of a nozzle device with outer shell positioning shown in the present invention;

[0031] Figure 3 is a partial cross-sectional view and enlarged view of a part of the nozzle in Embodiment 1 of the nozzle device shown in the present invention;

[0032] Figure 4 is a schematic structural diagram of Embodiment 2 of a nozzle device with outer shell positioning shown in the present invention;

[0033] Figure 5 It is a partial sectional view and enlarged view of some nozzles in the second embodiment of the nozzle device shown in the present invention;

[0034] Figure 6 It is a schematic structural view of the third embodiment of a nozzle device with housing positioning shown in the present invention;

[0035] Figure 7 It is a partial sectional view and enlarged view of some nozzles in the third embodiment of the nozzle device shown in the present invention;

[0036] Figure 8 It is a schematic structural view of the fourth embodiment of a nozzle device with housing positioning shown in the present invention;

[0037] Figure 9 It is a partial sectional view and enlarged view of some nozzles in the fourth embodiment of the nozzle device shown in the present invention.

[0038] In the figure: 201 nozzle body; 202, nozzle head; 203, nozzle head outer sleeve; 204, heater; 205, heating thermocouple; 206, nozzle orifice ring sleeve; 207, housing positioning table; 208, sealed housing; 209, fixing ring; 210, flow channel area; 211, valve needle. Specific embodiments

[0039] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0040] Specifically, please refer to and Figure 2 and Figure 3As shown in the figure, a nozzle device with shell positioning includes a nozzle, which consists of a nozzle body 201, a nozzle head 202, a nozzle head outer sleeve 203, a heating element, and a sealing shell 208. A flow channel area 210 facilitating the flow of plastic liquid is arranged in the nozzle body 201. A nozzle head 202 is provided at the lower end of the nozzle body 201. A nozzle head outer sleeve 203 is arranged outside the nozzle head 202, and the nozzle head outer sleeve 203 is connected to the nozzle body 201 through a threaded structure. A heating element is arranged outside the nozzle head outer sleeve 203, and the outside of the heating element is arranged inside the sealing shell 208. The sealing shell 208 wraps the connection part of the nozzle body 201 and the nozzle head 202, and a sealed cavity is formed between the sealing shell 208 and the nozzle body 201. The set lengths of the sealing shell outer sleeve 203 and the sealing shell 208 are shorter than the depth of the injection molding groove, and the sealing shell 208 and the sealing height shift backward toward the nozzle body 201. The nozzle head 202 is set in a stepped shape, and a stepped platform matching the outer shape of the nozzle head 202 is arranged inside the nozzle head outer sleeve 203. During the use process, it can facilitate the adaptability of the nozzle head 202 to fit tightly inside the nozzle head outer sleeve 203, avoid the shaking of the nozzle head 202, make the fit closer, reduce the heat loss during heat transfer, and the suitable nozzle head 202 can be replaced according to different injection molding requirements, which is convenient for installation.

[0041] The heating element includes a heater 204 and a heating thermocouple 205, and the heater 204 is set as an annular heater.

[0042] For Embodiment 1, please refer specifically to Figure 2 、 Figure 3 As shown in the figure, the heating end of the heating thermocouple 205 is arranged at the bottom of the heater 204. The combined double-heating structure of the heater 204 and the heating thermocouple 205 can be more precise during temperature adjustment control, and the temperature control of the heating thermocouple 205 is more precise. Moreover, the heating power of different heaters can be independently adjusted according to the temperature feedback at the nozzle opening, avoiding temperature loss or over-temperature.

[0043] The heater 204 is wrapped and attached to the outside of the nozzle sleeve 203, and the heating end of the heating thermocouple 205 is embedded into the outer circle at the bottom end of the nozzle sleeve 203, so that the heating effect directly acts on the nozzle head 202 to achieve temperature adjustment and heat preservation.

[0044] For Embodiment 2, please refer specifically to Figure 4 、 Figure 5 As shown in the figure, the heating end of the heating thermocouple 205 is arranged above the heater 204. The combined double-heating structure of the heater 204 and the heating thermocouple 205 can be more precise during temperature adjustment control, and the temperature control of the heating thermocouple 205 is more precise. Moreover, the heating power of different heaters can be independently adjusted according to the temperature feedback at the nozzle opening, avoiding temperature loss or over-temperature.

[0045] The heater 204 is wrapped and attached to the outer side of the lower end of the nozzle sleeve 203, and the heating end of the heating thermocouple 205 is embedded in the outer circle of the upper end of the bottom end of the nozzle sleeve 203, so that the heating effect directly acts on the nozzle head 202 to realize temperature adjustment and heat preservation. The temperature of the air isolation layer can be synchronously heated by using the heating thermocouple 205, so that the internal temperature tends to be stable and the influence of temperature abnormality on the use is avoided.

[0046] For Embodiment 3, please refer specifically to Figure 6 、 Figure 7 As shown, a valve needle 211 is arranged in the nozzle body 201, and the valve needle 211 is arranged in the flow channel area 210. The heating end of the heating thermocouple 205 is arranged at the bottom of the heater 204. The combination of the double heating structures of the heater 204 and the heating thermocouple 205 can be more precise during temperature adjustment control, and the temperature control of the heating thermocouple 205 is more precise. Moreover, the heating power of different heaters can be independently adjusted according to the temperature feedback of the nozzle port, avoiding temperature loss or over-temperature.

[0047] The heater 204 is wrapped and attached to the outside of the nozzle sleeve 203, and the heating end of the heating thermocouple 205 is embedded in the outer circle of the bottom end of the nozzle sleeve 203, so that the heating effect directly acts on the nozzle head 202 to realize temperature adjustment and heat preservation.

[0048] For Embodiment 4, please refer specifically to Figure 8 、 Figure 9 As shown, a valve needle 211 is arranged in the nozzle body 201, and the valve needle 211 is arranged in the flow channel area 210. The heating end of the heating thermocouple 205 is arranged above the heater 204. The combination of the double heating structures of the heater 204 and the heating thermocouple 205 can be more precise during temperature adjustment control, and the temperature control of the heating thermocouple 205 is more precise. Moreover, the heating power of different heaters can be independently adjusted according to the temperature feedback of the nozzle port, avoiding temperature loss or over-temperature.

[0049] The heater 204 is wrapped and attached to the outer side of the lower end of the nozzle sleeve 203, and the heating end of the heating thermocouple 205 is embedded in the outer circle of the upper end of the bottom end of the nozzle sleeve 203, so that the heating effect directly acts on the nozzle head 202 to realize temperature adjustment and heat preservation. The temperature of the air isolation layer can be synchronously heated by using the heating thermocouple 205, so that the internal temperature tends to be stable and the influence of temperature abnormality on the use is avoided.

[0050] In this embodiment, the part length of the sealing shell is set as a standard part, which is not limited by the length of the nozzle body. Corresponding fixing parts are selected according to different gate openings for convenient installation and fixing. Shortening the length of the sealing shell can reduce temperature damage, and shortening the length of the sealing shell can improve the strength of the sealing shell to withstand greater pressure. The structural parts can adopt technologies including but not limited to 3D printing, welding, tight-fitting inserts, etc.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nozzle device for positioning a housing, comprising a nozzle, characterized in that: The nozzle comprises a nozzle body (201), a nozzle head (202), a nozzle head jacket (203), a heating element, and a sealed shell (208); a flow channel area (210) for facilitating the circulation of plastic liquid is arranged in the nozzle body (201), and a nozzle head (202) is arranged at the lower end of the nozzle body (201); a nozzle head jacket (203) is arranged on the outer side of the nozzle head (202), and the nozzle head jacket (203) and the nozzle body (201) are connected via a threaded structure; a heating element is arranged on the outer side of the nozzle head jacket (203), and the outer side of the heating element is arranged inside the sealed shell (208); the sealed shell (208) is wrapped around the connection between the nozzle body (201) and the nozzle head (202), and a sealed cavity is formed between the sealed shell (208) and the nozzle body (201).

2. A shell-positioned nozzle device according to claim 1, characterized in that: The heating element comprises a heater (204) and a thermocouple (205); the heater (204) is configured as a ring-shaped heater, and the heating end of the thermocouple (205) is arranged on one side of the heater (204).

3. A shell-positioned nozzle device according to claim 2, characterized in that: The heater (204) is wrapped and attached to the outer side of the nozzle sleeve (203), and the heating end of the thermocouple (205) is embedded in the outer circle of the nozzle sleeve (203).

4. A shell-positioned nozzle device according to claim 1, characterized in that: A nozzle ring sleeve (206) is provided at a position where the nozzle head (202) extends outward from the sealing shell (208), and the nozzle ring sleeve (206) is connected to the outer side of the nozzle head (202) via a threaded structure.

5. A shell-positioned nozzle device according to claim 3, characterized in that: The outer side of the nozzle ring sleeve (206) also includes a temperature measuring component for sensing the temperature of the nozzle ring.

6. A shell-positioned nozzle device according to claim 1, characterized in that: A shell positioning platform (207) is arranged on the top of the sealing shell (208), and a shell fixing ring (209) matching the shell positioning platform (207) is arranged on the nozzle body (201), and the fixing ring (209) is used to limit the movement of the sealing shell (208).

7. A shell-positioned nozzle device according to claim 1, characterized in that: The sealed housing (208) is divided into an inner wall and an outer wall, with an air barrier layer arranged in the middle.

8. The shell-positioned nozzle device according to claim 1, characterized in that: A valve needle (211) is arranged in the nozzle body (201), and the valve needle (211) is arranged in the flow channel area (210).

9. A shell-positioned nozzle device according to any one of claims 1 to 8, characterized in that: The lengths of the sealing shell outer sleeve (203) and the sealing shell (208) are shorter than the depth of the injection molding groove, and the sealing shell (208) and the sealing height are offset toward the rear end of the nozzle body (201).

10. A shell-positioned nozzle device according to claim 9, characterized in that: The nozzle head (202) is arranged in a stepped shape, and a stepped platform matching the outer shape of the nozzle head (203) is arranged inside the nozzle head jacket (203).

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