An open-type multi-head side-injection glue nozzle

Abstract

This utility model discloses an open-type multi-head side-feed nozzle, including a nozzle body and nozzle cores, and a connecting flange and a multi-head base. The nozzle body is connected to the multi-head base via the connecting flange. Several nozzle cores are evenly arranged on the side of the multi-head base, perpendicular to the nozzle body. An upper material cavity is provided inside the nozzle body. A lower material cavity is provided inside the multi-head base. Several branch manifolds extend from below the lower material cavity and are connected to the nozzle cores one by one. The connecting flange includes an upper connecting cavity, a throat, and a diffuser section. The connecting cavity is connected to the upper material cavity, and its inner diameter gradually decreases from the upper material cavity towards the throat. The diffuser section is connected to the lower material cavity, and its inner diameter gradually increases from the throat towards the lower material cavity. This allows molten plastic to smoothly enter the flow channel in the multi-head base, reducing molding defects in injection molded products, optimizing weld strength, reducing internal stress, and ensuring a stable flow rate for better and more uniform filling of the mold, thus guaranteeing product consistency.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, and in particular to an open-type multi-head side-injection nozzle. Background Technology

[0002] The hot runner system acts as a bridge between the injection molding machine nozzle and the injection mold cavity. By independently heating and maintaining the temperature of the main nozzle, manifold, and nozzle of the hot runner system, the molten plastic is continuously controlled under injection molding conditions, effectively reducing waste and obtaining better product quality.

[0003] For tubular products such as pipettes, syringes, caps, and tubing, side injection is more advantageous for molding quality. Existing multi-head side injection nozzles, when used with multi-cavity molds, are prone to problems such as jetting marks, flow marks, or bubbles due to unstable injection flow rates. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the current hot runner side-discharge nozzles, this utility model provides an open-type single-nozzle multi-head side-discharge nozzle, which is suitable for multi-cavity molds and improves the quality of molded products.

[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0006] An open-type, multi-head, side-feed adhesive nozzle includes a nozzle body and nozzle cores, and includes a connecting flange and a multi-head base. The nozzle body is connected to the multi-head base via the connecting flange. Several nozzle cores are evenly arranged on the side of the multi-head base, perpendicular to the nozzle body. An upper material chamber is provided inside the nozzle body. A lower material chamber is provided inside the multi-head base. Several branch manifolds extend from below the lower material chamber and are connected to the nozzle cores one by one. The connecting flange includes an upper connecting cavity, a throat, and a diffuser section. The connecting cavity is connected to the upper material chamber, and its inner diameter gradually decreases from the upper material chamber towards the throat. The diffuser section is connected to the lower material chamber, and its inner diameter gradually increases from the throat towards the lower material chamber.

[0007] According to one aspect of this utility model, the number of nozzle cores is four, and the included angle between adjacent nozzle cores is 90°.

[0008] According to one aspect of the present invention, a bushing is provided between the upper connecting cavity and the nozzle body.

[0009] According to one aspect of this utility model, the nozzle core is connected to the multi-head base via a flange seat.

[0010] According to one aspect of the present invention, a main heater is provided on the surface of the nozzle body; the main heater is coiled around the surface of the nozzle body.

[0011] According to one aspect of the present invention, the main heater includes a dense coil section; the dense coil section is disposed on the nozzle body near the connecting flange side.

[0012] According to one aspect of the present invention, the surface of the multi-head base is provided with a base heater, including an upper heat equalization zone and a spacer portion.

[0013] According to one aspect of this utility model, the upper heat dissipation zone is disposed on the side of the multi-head base near the connecting flange; the spacer portion is disposed between adjacent nozzle cores.

[0014] According to one aspect of the present invention, the connecting flange is connected to the nozzle body and the multi-head base by threads.

[0015] According to one aspect of the present invention, a positioning part is provided at the upper end of the nozzle body; a material injection port is provided in the positioning part; the material injection port is connected to the upper material cavity.

[0016] Advantages of this utility model:

[0017] Four nozzle cores are evenly distributed on the side of the multi-head base, which can be used for multi-cavity molds that require side injection, improving production efficiency; the discrete structure design, with the nozzle body connected to the multi-head base through the connecting flange, facilitates later maintenance and has strong versatility; the connecting flange, including the upper connecting cavity, throat and diffuser section, actually forms a Venturi tube-like structure, which allows molten plastic to smoothly enter the flow channel in the multi-head base, reducing molding defects in injection molded products. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an open-type multi-head side-feed adhesive nozzle according to the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of an open-type multi-head side-feed adhesive nozzle according to the present invention. Figure 2 ;

[0021] Figure 3 for Figure 2 A cross-sectional view along line AA.

[0022] Legend: 1. Nozzle body; 11. Upper material chamber; 12. Main heater; 121. Dense winding section; 13. Positioning part; 131. Injection port; 2. Connecting flange; 21. Upper connecting chamber; 22. Throat; 23. Diffusion section; 24. Bushing; 3. Multi-head base; 31. Nozzle core; 311. Flange seat; 32. Lower material chamber; 33. Diversion manifold; 34. Base heater; 341. Upper heat equalization zone; 342. Spacing part. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, an open-type multi-head side-feed nozzle includes a nozzle body 1 and a nozzle core 31, and includes a connecting flange 2 and a multi-head base 3. The nozzle body 1 is connected to the multi-head base 3 through the connecting flange 2. Several nozzle cores 31 are evenly arranged on the side of the multi-head base 3, perpendicular to the nozzle body 1. An upper material chamber 11 is provided inside the nozzle body 1. A lower material chamber 32 is provided inside the multi-head base 3. Several branch manifolds 33 extend from the lower material chamber 32 and are connected to the nozzle cores 31 one by one. The connecting flange 2 includes an upper connecting cavity 21, a throat 22, and a diffuser section 23. The connecting cavity is connected to the upper material chamber 11, and its inner diameter gradually decreases from the upper material chamber to the throat 22. The diffuser section 23 is connected to the lower material chamber 32, and its inner diameter gradually increases from the throat 22 to the lower material chamber 32.

[0025] In this embodiment, there are four nozzle cores 31, and the included angle between adjacent nozzle cores 31 is 90°. At this time, the volume of the nozzle can be controlled relatively appropriately, achieving a relative balance between function and manufacturing cost.

[0026] The connecting flange 2, including the upper connecting cavity 21, throat 22, and diffuser section 23, actually forms a structure similar to a Venturi tube, which allows molten plastic to smoothly enter the flow channel in the multi-head base 3, reducing molding defects in injection molded products (such as flow marks, jet marks, etc.), optimizing weld strength, and reducing internal stress. At the same time, the stable flow rate can better and more evenly fill the mold, ensuring product consistency. In practical applications, a bushing 24 is provided between the upper connecting cavity 21 and the nozzle body 1. The shape of the bushing 24 matches the inner cavity of the connecting flange 2. Since the bushing 24 is a consumable part, it is designed as a replaceable independent part, which can improve the service life of the nozzle, protect the connection part, and facilitate later maintenance.

[0027] Furthermore, the connecting flange 2 is connected to the nozzle body 1 and the multi-head base 3 by threads, which facilitates the assembly and replacement of bases of other specifications and improves the versatility of the design; furthermore, each nozzle core 31 is connected to the multi-head base 3 by flange seat 311, which facilitates subsequent maintenance and replacement.

[0028] The upper end of the nozzle body 1 is provided with a positioning part 13 for connecting with the flow divider plate; the positioning part 13 is provided with a material inlet 131; the material inlet 131 is connected to the upper material chamber 11.

[0029] The nozzle body 1 and the multi-head base 3 are equipped with zoned heating, wherein the nozzle body 1 is provided with a main heater 12 on its surface; the main heater 12 is coiled around the surface of the nozzle body 1; the main heater 12 includes a dense coiled section 121; the dense coiled section 121 is located on the side of the nozzle body 1 near the connecting flange 2, that is, the main heater 12 is coiled more densely near the lower part of the body, and the design of being sparse at the top and dense at the bottom can ensure that the molten plastic maintains the uniformity of temperature during the downward flow process.

[0030] Similarly, the surface of the multi-head base 3 is provided with a base heater 34, including an upper heat equalization zone 341 and a spacer 342; the winding of the heater is designed according to the flow path of the molten plastic, wherein the upper heat equalization zone 341 is located on the side of the multi-head base 3 near the connecting flange 2; the spacer 342 is located between adjacent nozzle cores 31 to ensure temperature uniformity.

[0031] Advantages of this utility model:

[0032] Four nozzle cores are evenly distributed on the side of the multi-head base, which can be used for multi-cavity molds that require side injection, improving production efficiency; the discrete structure design, with the nozzle body connected to the multi-head base through the connecting flange, facilitates later maintenance and has strong versatility; the connecting flange, including the upper connecting cavity, throat and diffuser section, actually forms a Venturi tube-like structure, which allows molten plastic to smoothly enter the flow channel in the multi-head base, reducing molding defects in injection molded products.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An open-type multi-head side-feed adhesive nozzle, comprising a nozzle body (1) and a nozzle core (31), characterized in that, The system includes a connecting flange (2) and a multi-head base (3); the nozzle body (1) is connected to the multi-head base (3) via the connecting flange (2); there are several nozzle cores (31), which are evenly arranged on the side of the multi-head base (3) and perpendicular to the nozzle body (1); an upper material chamber (11) is provided inside the nozzle body (1); a lower material chamber (32) is provided inside the multi-head base (3); several branch manifolds (33) extend from the lower material chamber (32) and are connected to the nozzle cores (31) one by one; the connecting flange (2) includes an upper connecting cavity (21), a throat (22) and a diffuser section (23); the connecting cavity is connected to the upper material chamber (11), and its inner diameter gradually decreases from the upper material chamber to the throat (22); the diffuser section (23) is connected to the lower material chamber (32), and its inner diameter gradually increases from the throat (22) to the lower material chamber (32).

2. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, The number of nozzles (31) is four, and the included angle between adjacent nozzles (31) is 90°.

3. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, A bushing (24) is provided between the upper connecting cavity (21) and the nozzle body (1).

4. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, The nozzle core (31) is connected to the multi-head base (3) via a flange seat (311).

5. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, A main heater (12) is provided on the surface of the nozzle body (1); the main heater (12) is coiled around the surface of the nozzle body (1).

6. The open-type multi-head side-feed nozzle according to claim 5, characterized in that, The main heater (12) includes a dense coil section (121); the dense coil section (121) is disposed on the side of the nozzle body (1) near the connecting flange (2).

7. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, The multi-head base (3) is provided with a base heater (34) on its surface, including an upper heat equalization zone (341) and a spacer (342).

8. The open-type multi-head side-feed nozzle according to claim 7, characterized in that, The upper heat dissipation zone (341) is located on the side of the multi-head base (3) near the connecting flange (2); the spacer (342) is located between adjacent nozzle cores (31).

9. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, The connecting flange (2) is connected to the nozzle body (1) and the multi-head base (3) by threads.

10. The open-type multi-head side-feed nozzle according to claim 1, characterized in that, The upper end of the nozzle body (1) is provided with a positioning part (13); the positioning part (13) is provided with a material inlet (131); the material inlet (131) is connected to the upper material cavity (11).

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