Die for manufacturing LED lamp filament

Abstract

The utility model relates to the technical field of LED lighting, in particular to a die for manufacturing an LED filament, which comprises a die frame, an inner die core is connected to the die frame in an embedded and clamped manner through a groove formed in the die frame, an outer die core is rotatably connected to the outside of the die frame through a mounting frame, and limiting grooves are formed in the surface of the die frame and the surface of the outer die core. A material storage box is arranged at the top of the mold frame, and a first drainage opening communicated with the material storage box is formed in the top wall of the interior of the mold frame. According to the improved mold for manufacturing the LED lamp filament, the inclined structure of the mold frame enables internal glue raw materials to flow along with the gravity under the action of gravity, the glue raw materials can be evenly attached to the surface of an LED support arranged between the inner mold core and the outer mold core in the flowing process, the effect of even coating is achieved, the complexity of back-and-forth turn-over coating is avoided, and the service life of the LED lamp filament is prolonged. The cavities at the bottoms of the inner mold core and the outer mold core enable redundant colloid to flow into the backflow box through the second drainage opening, the collected colloid raw materials can be reused in the follow-up process, and cost consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of LED lighting, in particular to a mold for manufacturing an LED filament. Background Art

[0002] The LED light-emitting diode is a commonly used light-emitting device that emits light by the recombination of electrons and holes. It is widely used in the field of lighting. The LED filament is also called an LED lamp post. In the past, for an LED light source to achieve a certain illuminance and illumination area.

[0003] Before the bottom base of the LED lamp bead is encapsulated, optical devices such as lenses need to be installed. On the basis of the LED bracket, the chip is fixed, the positive and negative electrodes are welded, and then it is encapsulated and formed at one time with encapsulating glue. The LED filament realizes 360° full-angle light emission through the encapsulation structure, emits light at a large angle and does not require a lens, realizing a three-dimensional light source.

[0004] The inventor found the following problems in the prior art during the implementation of the present utility model: 1. The existing encapsulating glue generally uses a dispensing method. Due to reasons such as the dispensing technique or uneven coating of the glue, blue light overflows, stray light appears, and the light emitted by the overall light source is uneven; 2. The dispensing method requires double-sided operation, greatly reducing the processing efficiency. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a mold for manufacturing an LED filament to solve the problems of uneven coating and double-sided processing affecting work efficiency in the above-mentioned background art. To achieve the above purpose, the present utility model provides the following technical solution: A mold for manufacturing an LED filament, including a mold frame, the mold frame is embedded and snap-connected with an inner mold core through a groove opened inside it, the outer part of the mold frame is rotatably connected with an outer mold core through a mounting frame, limiting grooves are opened on the surfaces of both the mold frame and the outer mold core, a storage tank is opened at the top of the mold frame, a first drainage port communicating with the storage tank is opened at the top wall inside the mold frame, pouring ports are respectively opened at the top walls inside the inner mold core and the outer mold core, the pouring ports are respectively located below the first drainage port, a second drainage port is penetrated and opened at the bottom of the mold frame, and a reflux tank is opened below the second drainage port.

[0006] Further preferably, the mold frame is rotatably connected with a machine frame through a mounting frame, and the bottom of the mold frame and the machine frame form an angle of 15 degrees.

[0007] Further preferably, the inside of the limiting groove is in a threaded shape, and the limiting groove is equipped with a quick-release bolt, and the mold frame and the outer mold core are threadedly connected through the limiting groove and the quick-release bolt.

[0008] Further preferably, semi-circular grooves for placing LED brackets are provided inside both the inner mold core and the outer mold core. A plurality of through holes are provided on the surfaces at both ends of the inner mold core, and a plurality of connecting columns for insertion and connection with the through holes are welded on the surface of the outer mold core. Meanwhile, the inner mold core and the outer mold core are in an insertion connection.

[0009] Further preferably, the filling ports are in a fitting connection through the inner mold core and the outer mold core. The top between the filling ports is in a fitting connection with the bottom of the first drainage port, and the distance between the filling ports is consistent with the diameter specification of the first drainage port.

[0010] Further preferably, cavities communicating with the second drainage port are provided at the bottoms of the inner walls of the inner mold core and the outer mold core. The position and size of the distribution of the second drainage port are consistent with the distance between the inner corners of the return box. Meanwhile, the return box is snap-fitted into the concave groove provided at the bottom of the mold base through the buckle provided at the bottom of the mold base.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, due to the inclined structure of the mold base, the internal glue raw material flows smoothly under the action of gravity. During the flow of the glue raw material, it will evenly adhere to the surface of the LED bracket installed between the inner mold core and the outer mold core. This kind of glue injection method can achieve the effect of uniform coating and avoid the tediousness of turning over and coating back and forth.

[0013] In the present utility model, after the glue injection is completed, by opening and closing the outer mold core, the inner mold core is arranged in a split structure, which is convenient for the overall removal of the inner mold core loaded with the processing raw material. Meanwhile, the cavities at the bottoms of the inner mold core and the outer mold core enable the excess glue to flow into the interior of the return box through the second drainage port. The collected glue raw material can be reused later, reducing cost consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view structural schematic diagram of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the second drainage port and the return box of the present utility model;

[0016] Figure 3 is the internal structural schematic diagram of the inner mold core and the outer mold core of the present utility model;

[0017] Figure 4 is the structural schematic diagram of the first drainage port of the present utility model.

[0018] In the figure: 1. Mold base; 2. Inner mold core; 3. Outer mold core; 4. Limit groove; 5. Material storage box; 6. First drainage port; 7. Filling port; 8. Second drainage port; 9. Return box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a mold for manufacturing an LED filament, including a mold frame 1. The mold frame 1 is embedded and snap-connected with an inner mold core 2 through a groove opened inside it. The outer part of the mold frame 1 is rotatably connected with an outer mold core 3 through a mounting frame. Limiting grooves 4 are opened on the surfaces of both the mold frame 1 and the outer mold core 3. A material storage box 5 is opened at the top of the mold frame 1. A first drainage port 6 communicating with the material storage box 5 is opened at the top wall inside the mold frame 1. Pouring ports 7 are respectively opened at the top walls inside the inner mold core 2 and the outer mold core 3. The pouring ports 7 are respectively located below the first drainage port 6. A second drainage port 8 is penetrated and opened at the bottom of the mold frame 1. A reflux box 9 is opened below the second drainage port 8.

[0021] In this embodiment, as Figure 1 shown, the mold frame 1 is rotatably connected with a machine frame through a mounting frame, and the bottom of the mold frame 1 and the machine frame form a 15-degree angle; the mold frame 1 is fixed to the front end of the glue injection of the external operating equipment through the external machine frame. The machine frame is provided with support columns to keep the mold frame 1 always in an inclined angle. Because the glue has certain fluidity, the internal glue raw material flows smoothly under the action of gravity through the inclined structure of the mold frame 1. During the flowing process of the glue raw material, it will evenly adhere to the surface of the LED bracket installed between the inner mold core 2 and the outer mold core 3.

[0022] In this embodiment, as Figure 1 and Figure 2 shown, the inside of the limiting groove 4 is in a threaded shape, and the limiting groove 4 is equipped with a quick-release bolt. And the mold frame 1 and the outer mold core 3 are threadedly connected through the limiting groove 4 and the quick-release bolt; the LED bracket is embedded and assembled at the circular groove inside the inner mold core 2, and then fixed by clamping the inner mold core 2 and the outer mold core 3 to ensure that it does not displace due to the inclined position of the mold frame 1. At the same time, after the glue injection is completed, for the convenience of discharging, the inner mold core 2 is set as a split structure, and the limiting groove 4 and the quick-release bolt provide an effective limiting effect during the processing of the outer mold core 3.

[0023] In this embodiment, as Figure 2As shown, semi-circular grooves for placing LED brackets are provided inside both the inner mold core 2 and the outer mold core 3. A plurality of through holes are provided on the surfaces at both ends of the inner mold core 2, and a plurality of connecting posts for insertion and connection with the through holes are welded on the surface of the outer mold core 3. At the same time, the inner mold core 2 and the outer mold core 3 are in an insertion connection; after the injection molding is completed, by opening and closing the outer mold core 3, the entire inner mold core 2 loaded with the processing raw material is taken out. The structures on the surfaces of the inner mold core 2 and the outer mold core 3 facilitate docking.

[0024] In this embodiment, as Figure 2 and Figure 4 shown, the pouring ports 7 are in a fitting connection through the inner mold core 2 and the outer mold core 3. The top between the pouring ports 7 is in contact with the bottom of the first drainage port 6, and the distance between the pouring ports 7 is the same as the diameter specification of the first drainage port 6; the storage tank 5 is used to load the glue raw material. The pouring ports 7 serve as channels for secondary drainage. The position of each pouring port 7 is correspondingly connected to the groove inside for placing the LED bracket, and the glue raw material will flow into the groove through the first drainage port 6 and the pouring ports 7 and adhere.

[0025] In this embodiment, as Figure 2 and Figure 3 shown, cavities communicating with the second drainage port 8 are provided at the bottoms of the inner walls of the inner mold core 2 and the outer mold core 3. The position and size of the distribution of the second drainage port 8 are the same as the distance between the inner corners of the return box 9. And the return box 9 is snap-fitted into the concave groove provided at the bottom of the mold base 1 through the locking buckle provided at the bottom of the mold base 1; to prevent the colloid from flowing and accumulating at the inner bottoms of the inner mold core 2 and the outer mold core 3 during the processing of the entire mold, causing cleaning troubles, through the cavities at the bottoms of the inner mold core 2 and the outer mold core 3, the excess glue will flow into the interior of the return box 9 through the second drainage port 8. The collected glue raw material can be reused later, and at the same time, the processing cost is reduced.

[0026] The usage method and advantages of the present utility model: The mold for manufacturing the LED filament, when in use, the working process is as follows:

[0027] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, it should be noted first that in the existing coating method, when using the dispensing method, the texture fluidity of the glue is relatively weak. Before processing, the glue raw material is pre-processed to make it have a certain fluidity. Then, the mold base 1 is fixed through an external connecting piece and the frame at the bottom of the mold base 1 to make it inclined at a certain angle. After the LED bracket is snap-fitted into the groove inside the inner mold core 2, the outer mold core 3 is flipped. When the outer mold core 3 fits with the inner mold core 2, the connecting posts on its surface will be inserted into the through holes on the surface of the inner mold core 2. When the inner mold core 2 and the outer mold core 3 are fitted, the perfusion port 7 inside them will form a circular through hole consistent with the first drainage port 6 and closely fit below the first drainage port 6 to form a channel for the glue raw material to flow through. And at this time, the limiting grooves 4 on the surface of the outer mold core 3 coincide with the limiting grooves 4 outside the mold base 1, and the outer mold core 3 is fixed on the surface of the mold base 1 through the fastener bolts assembled through the limiting grooves 4. The pipe at the top of the storage tank 5 is threadedly connected to an external glue supply device. The storage tank 5 can be made of semi-transparent acrylic or tempered glass. The glue raw material will flow in through the first drainage port 6 and the perfusion port 7. During the flow of the glue raw material, it will evenly adhere to the surface of the LED bracket installed between the inner mold core 2 and the outer mold core 3. The residual glue raw material will flow into the inside of the return tank 9 under the drainage of the second drainage port 8 through the cavities at the bottoms of the inner mold core 2 and the outer mold core 3. After the glue injection is completed, stop the glue supply source, separate the outer mold core 3 through the bolts on the surface of the limiting groove 4, and after rotating and opening, remove the inner mold core 2. Through this kind of glue injection method, the effect of uniform coating can be achieved, and the tediousness of coating by turning over back and forth can be avoided. At the same time, multiple groups of LED brackets can be operated simultaneously to improve the efficiency. The excess glue raw material can be reused by disassembling the return tank 9 to reduce cost consumption.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A mold for making an LED filament, comprising a mold frame (1), characterized in that: The mold frame (1) is connected to the inner mold core (2) through an embedded snap-fitting groove provided inside the mold frame, and the outer mold core (3) is rotatably connected to the outer mold core (3) on the outside of the mold frame (1). The surface of the mold frame (1) and the surface of the outer mold core (3) are both provided with limiting grooves (4). A material storage box (5) is provided on the top of the mold frame (1), and a first drainage port (6) which is connected to the material storage box (5) is provided on the top wall inside the mold frame (1). Injection ports (7) are respectively provided on the top walls inside the inner mold core (2) and the outer mold core (3), and the injection ports (7) are respectively located below the first drainage port (6). A second drainage port (8) is provided through the bottom of the mold frame (1), and a reflux box (9) is provided below the second drainage port (8).

2. A mold for making LED filaments according to claim 1, characterized in that: The mold frame (1) is rotatably connected to the frame via a mounting frame, and the mold frame (1) forms an angle of 15 degrees with the bottom of the frame.

3. A mold for making LED filaments according to claim 1, characterized in that: The interior of the limiting groove (4) is threaded, and the limiting groove (4) is equipped with a quick-release bolt, and the mold frame (1) and the outer mold core (3) are threadedly connected via the limiting groove (4) and the quick-release bolt.

4. A mold for making LED filaments according to claim 1, characterized in that: The inner mold core (2) and the outer mold core (3) are both provided with semicircular grooves for accommodating the LED bracket, and the surfaces of the two ends of the inner mold core (2) are provided with a plurality of through holes, and the surface of the outer mold core (3) is welded with a plurality of connecting columns for plugging into the through holes, and the inner mold core (2) and the outer mold core (3) are plug-in connected.

5. The mold for making LED filament according to claim 1, characterized in that: The pouring ports (7) are closely connected to each other via the inner mold core (2) and the outer mold core (3), and the top of the pouring ports (7) is closely connected to the bottom of the first drainage port (6), and the distance between the pouring ports (7) is consistent with the diameter specification of the first drainage port (6).

6. The mold for making LED filaments according to claim 1, characterized in that: The bottom of the inner wall of the inner mold core (2) and the outer mold core (3) is provided with a cavity which is in communication with the second drainage port (8), and the position and size of the second drainage port (8) are consistent with the distance between the inner corners of the return box (9), and the return box (9) is connected to the concave groove provided at the bottom of the mold frame (1) through a lock snap-fit ​​provided at the bottom of the mold frame (1).

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