Multi-point glue feeding mechanism

Abstract

The utility model discloses a multi-point type glue feeding mechanism which comprises a rear mold core and a product, the rear mold core is provided with an injection molding cavity matched with the product, and the rear mold core is further provided with a glue feeding groove communicated with the injection molding cavity; the two glue inlet grooves are symmetrically formed in the two sides of the injection molding cavity. The end, close to the injection molding cavity, of the injection molding cavity is connected with two flow dividing grooves. The included angle between the two diversion grooves is an obtuse angle; a connecting groove is connected to the connecting position of the flow dividing groove and the injection molding cavity. The connecting groove is perpendicular to the flow dividing groove; a protruding part is arranged at the end, close to the connecting groove, of the flow dividing groove. The end part of the protruding part is arc-shaped; the end part of the connecting groove is connected with a glue inlet; and the glue inlet is communicated with the injection molding cavity and is inclined downwards. According to the utility model, a multi-point glue feeding mode is adopted, so that the adhesiveness of a rubber-coated product and a product is better, and weld lines on the appearance of the product are effectively eliminated.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a multi-point glue injection mechanism. Background Technology

[0002] Injection molding is a processing method used for mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and then cooling and solidifying it to obtain the molded product. Existing injection molds usually have only one injection point for injection molding. In actual operation, it has been found that the weld line at the outer connection of the product is obvious after single-point injection, which affects the appearance of the product. Utility Model Content

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a multi-point glue feeding mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-point injection mechanism includes a rear mold core and a product. The rear mold core has an injection cavity that matches the product, and also has injection grooves communicating with the injection cavity. Two injection grooves are symmetrically arranged on both sides of the injection cavity. Two flow dividers are connected to one end of the injection cavity near the injection cavity. The included angle between the two flow dividers is an obtuse angle. A connecting groove is connected to the connection between the flow dividers and the injection cavity. The connecting groove is perpendicular to the flow dividers. A protrusion is also provided at one end of the flow divider near the connecting groove. The end of the protrusion is arc-shaped. An injection port is connected to the end of the connecting groove. The injection port communicates with the injection cavity and is inclined downwards.

[0006] Preferably, the diversion channel and the connecting channel are arranged horizontally; the glue inlet channel and the diversion channel are arranged vertically; and the connection between the glue inlet channel and the diversion channel is arc-shaped.

[0007] Preferably, the rear mold core is further connected to ejector pin one and ejector pin two; ejector pin one is disposed at the lower end of the injection cavity; ejector pin two is provided in multiples and is disposed at the lower end of four protrusions respectively.

[0008] Preferably, the lower ends of ejector pin one and ejector pin two are connected to ejector pin plates; ejector pin one and ejector pin two are driven to move up and down simultaneously by ejector pin plates.

[0009] Compared with the prior art, this utility model provides a multi-point glue injection mechanism, which has the following advantages:

[0010] This multi-point glue injection mechanism, by connecting a diversion channel inside the glue injection groove, diverts the glue after injection, making the glue injection on both sides more uniform. The glue injection port is set in an inclined state to accelerate the glue injection speed and prevent the glue after hot melting from entering and clogging the gate, resulting in incomplete glue injection and affecting product quality. Furthermore, by setting the glue injection method at multiple points, the adhesion between the glued product and the product is better, and it effectively eliminates weld lines on the product's appearance, making the side walls of the product smoother. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a top view of the present invention;

[0013] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0014] In the diagram: 10. Rear mold core; 11. Injection cavity; 12. Product; 21. Inlet groove; 22. Diverter groove; 23. Connecting groove; 24. Protrusion; 25. Inlet; 26. Ejector pin one; 27. Ejector pin two; 28. Ejector plate. Detailed Implementation

[0015] The following will refer to Figure 1-3 This invention describes a specific implementation of a multi-point injection mechanism, including a rear mold core 10 and a product 12. The rear mold core 10 has an injection cavity 11 that matches the product 12, and an injection groove 21 communicating with the injection cavity 11. Two injection grooves 21 are symmetrically arranged on both sides of the injection cavity 11. Two flow dividers 22 are connected to one end of the injection cavity 11 near the injection cavity 11. The included angle between the two flow dividers 22 is an obtuse angle. A connecting groove 23 is connected to the connection between the flow dividers 22 and the injection cavity 11. The connecting groove 23 is perpendicular to the flow dividers 22. A protrusion 24 is provided at one end of the flow divider 22 near the connecting groove 23. The end of the protrusion 24 is arc-shaped. An injection port 25 is connected to the end of the connecting groove 23. The injection port 25 communicates with the injection cavity 11 and is inclined downwards.

[0016] like Figure 1 As shown, the flow divider 22 and the connecting groove 23 are horizontally arranged; the glue inlet groove 21 and the flow divider 22 are vertically arranged; and the connection between the glue inlet groove 21 and the flow divider 22 is arc-shaped. The arc shape allows for better flow and avoids the angle, which facilitates demolding.

[0017] To facilitate demolding of product 12, ejector pin 1 26 and ejector pin 27 are also connected to the rear mold core 10; ejector pin 1 26 is located at the lower end of the injection cavity 11; multiple ejector pins 27 are provided and are respectively located at the lower ends of four protrusions 24; ejector pin 1 26 and ejector pin 27 are connected to an ejector plate 28 at their lower ends; ejector pin 1 26 and ejector pin 27 move up and down simultaneously driven by the ejector plate 28; wherein Figure 3 The product 12 after ejection has two gating heads on both sides that match the glue inlet groove. The gating heads and product 12 are ejected simultaneously by ejector pins.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-point injection mechanism, comprising a rear mold core (10) and a product (12), wherein the rear mold core (10) is provided with an injection cavity (11) matching the product (12), characterized in that, The rear mold core (10) is also provided with a sprue groove (21) communicating with the injection cavity (11); there are two sprue grooves (21) and they are symmetrically arranged on both sides of the injection cavity (11); the injection cavity (11) is connected to two flow dividers (22) at one end near the injection cavity (11); the included angle between the two flow dividers (22) is an obtuse angle; a connecting groove (23) is connected at the connection between the flow divider (22) and the injection cavity (11); the connecting groove (23) is perpendicular to the flow divider (22); the flow divider (22) is also provided with a protrusion (24) at one end near the connecting groove (23); the end of the protrusion (24) is arc-shaped; the end of the connecting groove (23) is connected to a sprue port (25); the sprue port (25) is communicating with the injection cavity (11) and is inclined downward.

2. The multi-point glue feeding mechanism according to claim 1, characterized in that, The diversion groove (22) and the connecting groove (23) are arranged horizontally; the glue inlet groove (21) and the diversion groove (22) are arranged vertically; and the connection between the glue inlet groove (21) and the diversion groove (22) is arc-shaped.

3. The multi-point glue feeding mechanism according to claim 1, characterized in that, The rear mold core (10) is also connected to ejector pin one (26) and ejector pin two (27); ejector pin one (26) is located at the lower end of the injection cavity (11); ejector pin two (27) is provided in multiples and is respectively located at the lower end of four protrusions (24).

4. The multi-point glue feeding mechanism according to claim 3, characterized in that, The lower ends of the first ejector pin (26) and the second ejector pin (27) are connected to the ejector plate (28); the first ejector pin (26) and the second ejector pin (27) move up and down simultaneously through the ejector plate (28).

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