Injection mold combined with hot runner and cold runner

Abstract

The application discloses a cold-hot runner combined glue feeding injection mold, which comprises an upper mold and a lower mold, the upper mold is provided with an upper mold core, and the lower mold is provided with a lower mold core; the upper mold core and the lower mold core are arranged to define a cavity; a main glue feeding port is arranged on the upper surface of the upper mold, and the main glue feeding port is communicated with the cavity through a main flow channel assembly arranged on the upper mold; a secondary glue feeding port is arranged on the side surface of the upper mold, and the secondary glue feeding port is communicated with the main flow channel assembly through a side flow channel assembly; and the side flow channel assembly at least comprises a cold flow channel and a hot flow channel. The beneficial effects of the application mainly include that the cold flow channel and the hot flow channel can timely deliver glue to the main flow channel, the glue is mixed through a main pressure regulating pump, the temperature is quickly regulated, the situation that the glue temperature is not uniform is avoided, the yield rate during injection is further improved, and in addition, the layout is reasonable and compact, and the application has wide applicability.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more particularly to an injection mold with a combination of hot and cold runners for injection. Background Technology

[0002] Injection molding is a method of shaping industrial products. Products are usually made using rubber injection molding and plastic injection molding. As a rapid prototyping device, injection molding machines are widely used in various industries. In my country, injection molding machines have been developed for more than 50 years and are gradually becoming more mature.

[0003] With the increasing variety and complexity of injection-molded products across various sectors, the design of injection molds has become increasingly complex. During the injection molding process, the internal temperature of the mold is often uncontrollable. For example, authorized patent CN216708203U discloses an injection mold comprising a fitted upper mold and a lower mold. The mating surfaces of the upper and lower molds are provided with umbrella-shaped runner channels and a product mold groove. The umbrella-shaped runner channels connect to the product mold groove. An inlet is located at the center of the upper mold. The upper and lower molds are equipped with identical temperature regulating devices, including an inlet pipe and an outlet pipe, both connected to a T-shaped branch pipe at their ends, which are connected by a horizontal pipe. However, the large size of these temperature regulating devices hinders efficient layout and makes timely temperature adjustment difficult, leading to inconsistent product specifications and a low yield rate. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an injection mold that combines hot and cold runners for injection.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An injection mold with a combination of hot and cold runners includes an upper mold and a lower mold, which are separated into upper and lower parts. The upper mold has an upper mold core, and the lower mold has a lower mold core. The upper and lower mold cores are configured to define a cavity for injection molding a product. A main gate is provided on the upper surface of the upper mold, and the main gate is connected to the cavity through a main flow assembly provided on the upper mold. A secondary gate is provided on one side of the upper mold, and the secondary gate is connected to the main flow assembly through a bypass flow assembly. The bypass flow assembly includes at least a cold flow channel and a hot flow channel, and both the cold flow channel and the hot flow channel are connected to the main flow assembly through a temperature regulator.

[0007] Preferably, the main flow assembly includes at least a main flow pipe fixed on the upper mold, one end of the main flow pipe being connected to the glue inlet and the other end being connected to the cavity.

[0008] Preferably, the main flow pipe is equipped with a main pressure regulating pump.

[0009] Preferably, the main flow pipe is also provided with a detection pipe connected to it, and a pressure sensor is fixedly installed on the detection pipe.

[0010] Preferably, the bypass assembly includes two cold flow pipes and two hot flow pipes.

[0011] Preferably, a temperature sensor is provided between the upper mold and the lower mold, and the temperature sensor is electrically connected to the temperature regulator.

[0012] Preferably, both the upper and lower molds are provided with water cooling pipes, which are close to the cavity.

[0013] Preferably, the lower mold includes at least a base plate and a lifting plate disposed thereon. A lower template is provided above the lifting plate, and the lower mold core is provided on the lower template. A set of ejector pins is also fixed on the lifting plate, and the ejector pins can penetrate the lower template and extend into the lower mold core.

[0014] Preferably, the lifting plate is further provided with support blocks fixed on the base plate on both sides. The support blocks are located below the lower template and are fixed with support columns. The support columns extend through the lower template into the upper template.

[0015] Preferably, the upper mold includes an upper template, a receiving plate, and a top plate arranged sequentially from bottom to top, and the upper template, the receiving plate, and the top plate are connected by locking bolts.

[0016] The beneficial effects of this invention are mainly reflected in:

[0017] 1. The design is ingenious. The cold flow pipe and hot flow pipe can deliver the rubber material to the main flow pipe in a timely manner. The main pressure regulating pump mixes the rubber material and adjusts the temperature quickly, thereby avoiding uneven temperature of the rubber material and further improving the yield rate during injection molding. In addition, the layout is reasonable and compact and has a wide range of applicability.

[0018] 2. The temperature sensor can detect the temperature of the main flow pipe in real time, and the temperature regulator can control the temperature of the cold flow pipe and the hot flow pipe to ensure that the temperature of the rubber material is consistent when it is discharged, thus ensuring the temperature of the rubber material.

[0019] 3. The water cooling pipes are close to the cavity, which can quickly cool the cavity after injection molding, thereby improving demolding efficiency. Attached Figure Description

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 : A perspective view of a preferred embodiment of the present invention;

[0022] Figure 2 : A perspective view of a preferred embodiment of the present invention, in which the upper template, the receiving plate, and the top plate are removed. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 2As shown, this invention discloses an injection mold with a combination of hot and cold runners, comprising an upper mold 1 and a lower mold 2, which are separated into upper and lower parts. The upper mold 1 includes an upper template 12, a receiving plate 13, and a top plate 14 arranged sequentially from bottom to top. The upper template 12, the receiving plate 13, and the top plate 14 are connected by locking bolts, which allows for quick installation and disassembly, greatly improving work efficiency. The upper mold 1 is provided with an upper mold core 11. The lower mold 2 includes at least a base plate and a lifting plate 23 disposed thereon. A lower template 24 is disposed above the lifting plate 23, and the lower mold core is formed on the lower template 24. A set of ejector pins is also fixed on the lifting plate 23, and the ejector pins can penetrate the lower template 24 and extend into the lower mold core. The lifting plate 23 is also provided with support blocks 28 fixed on the base plate on both sides. The support blocks 28 are located below the lower template 24, and support columns 29 are fixed on them. The support columns 29 extend through the lower template 24 and into the upper template 1.

[0028] The upper surface of the upper mold 1 is provided with a main inlet 5, which is connected to the cavity through a main flow assembly 6 disposed on the upper mold 1. A secondary inlet 4 is provided on one side of the upper mold 1, which is connected to the main flow assembly 6 through a bypass assembly 7. The main flow assembly 6 includes at least a main flow pipe 61 fixed on the upper mold 1, one end of which is connected to the inlet 5 and the other end of which is connected to the cavity.

[0029] The main flow pipe 61 is equipped with a main pressure regulating pump 62. The cold flow pipe and the hot flow pipe can deliver the rubber material to the main flow pipe in a timely manner. The main pressure regulating pump mixes the rubber material, thereby quickly regulating the temperature and avoiding uneven temperature of the rubber material. This further improves the yield rate during injection molding. In addition, the layout is reasonable and compact, and has a wide range of applicability.

[0030] The main flow pipe 61 is also provided with a detection pipe 69 connected to it. A pressure sensor 63 is fixed on the detection pipe 69 to detect the temperature inside the main flow pipe 61 in real time. In addition, the pressure sensor 63 is electrically connected to the main pressure regulating pump 62.

[0031] The bypass assembly 7 includes at least a cold flow pipe 71 and a hot flow pipe 72. Both the cold flow pipe 71 and the hot flow pipe 72 are connected to the main flow assembly 6 via a temperature regulator. The cold and hot flow pipes can regulate the temperature of the main flow pipe, thereby preventing uneven material temperature due to prolonged material flow and improving the yield rate during injection molding. In this preferred embodiment, the bypass assembly 7 includes two cold flow pipes 71 and two hot flow pipes 72. Of course, other numbers of cold flow pipes 71 and hot flow pipes 72 can be provided, and adjustments can be made according to actual needs; all of these fall within the scope of this invention. A temperature sensor is provided between the upper mold 1 and the lower mold 2, and the temperature sensor is electrically connected to the temperature regulator.

[0032] Both the upper mold 1 and the lower mold 2 are equipped with water-cooling pipes 3, which are close to the cavity. The close proximity of the water-cooling pipes to the cavity allows for rapid cooling of the cavity after injection molding, thereby improving demolding efficiency.

[0033] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. An injection mold with a combination of hot and cold runners, comprising an upper mold (1) and a lower mold (2) separately disposed above and below, wherein the upper mold (1) is provided with an upper mold core (11) and the lower mold (2) is provided with a lower mold core, wherein the upper mold core (11) and the lower mold core are configured to define a cavity for injection molding a product, characterized in that: The upper surface of the upper mold (1) is provided with a main inlet (5), which is connected to the cavity through a main flow assembly (6) provided on the upper mold (1). A secondary inlet (4) is provided on one side of the upper mold (1), which is connected to the main flow assembly (6) through a bypass flow assembly (7). The bypass flow assembly (7) includes at least a cold flow pipe (71) and a hot flow pipe (72), which are both connected to the main flow assembly (6) through a temperature regulator.

2. The injection mold with combined hot and cold runners and injection ports as described in claim 1, characterized in that: The main flow assembly (6) includes at least a main flow pipe (61) fixed on the upper mold (1), one end of the main flow pipe (61) is connected to the glue inlet (5), and the other end is connected to the cavity.

3. The injection mold with combined hot and cold runners and injection ports according to claim 2, characterized in that: The main flow pipe (61) is equipped with a main pressure regulating pump (62).

4. The injection mold with combined hot and cold runners and injection ports according to claim 2, characterized in that: The main flow pipe (61) is also provided with a detection pipe (69) connected to it, and a pressure sensor (63) is fixed on the detection pipe (69).

5. The injection mold with hot and cold runners combined for injection as described in claim 2, characterized in that: The bypass assembly (7) includes two cold flow pipes (71) and two hot flow pipes (72).

6. The injection mold with combined hot and cold runners and injection ports according to claim 1, characterized in that: A temperature sensor is provided between the upper mold (1) and the lower mold (2), and the temperature sensor is electrically connected to the temperature regulator.

7. The injection mold with hot and cold runners combined for injection as described in claim 1, characterized in that: Both the upper mold (1) and the lower mold (2) are provided with water cooling pipes (3), which are close to the cavity.

8. The injection mold with hot and cold runners combined for injection as described in claim 1, characterized in that: The lower mold (2) includes at least a base plate and a lifting plate (23) disposed thereon. A lower template (24) is provided above the lifting plate (23). The lower mold core is provided on the lower template (24). A set of ejector pins is also fixed on the lifting plate (23). The ejector pins can penetrate the lower template (24) and extend into the lower mold core.

9. The injection mold with hot and cold runners combined for injection as described in claim 8, characterized in that: The lifting plate (23) is also provided with support blocks (28) fixed on the bottom plate on both sides. The support blocks (28) are located below the lower template (24) and are fixed with support columns (29). The support columns (29) extend through the lower template (24) into the upper template (1).

10. The injection mold with combined hot and cold runners and injection ports according to claim 1, characterized in that: The upper mold (1) includes an upper template (12), a receiving plate (13) and a top plate (14) arranged sequentially from bottom to top. The upper template (12), the receiving plate (13) and the top plate (14) are connected by locking bolts.

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