Casting mold for tire mouthpiece core

Abstract

The utility model relates to the technical field of aluminum alloy part casting, in particular to a casting mold of a tire mouthpiece core, which comprises an upper mold and a lower mold, an upper convex mold is arranged on the lower surface of the upper mold, a forming concave mold cavity is arranged on the upper side of the lower mold, and an injection molding opening is arranged in the middle of the upper convex mold. Two U-shaped runners and two or more part cavities are formed in the forming female die cavity, the part cavities are transversely arranged at equal intervals and communicated with the U-shaped runners, the part cavities are located in the annular range of the U-shaped runners, the opening directions of the two U-shaped runners deviate from each other left and right, and the injection molding openings are located in the middle positions of the U-shaped runners. According to the mold, the layout structure of the cavity is redesigned, so that all the part cavities for forming the tire mouthpiece core are connected under the condition of saving casting liquid to the greatest extent, and a small-size aluminum alloy part of the tire mouthpiece core can be conveniently, efficiently and quickly demolded.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy parts casting, in particular to a casting mold for a tire nozzle core. Background Art

[0002] "Tire nozzle core" usually refers to the valve core on the car tire, which is a small part connecting the inner tube and the outer tube. The valve core can prevent gas leakage and keep the air pressure inside the tire stable. When the tire needs to be inflated, it needs to be inflated through the valve core.

[0003] The tire nozzle core is made of aluminum alloy and is cast in a conventional casting mold. Due to its small size, usually one mold is set with one core, and only one tire nozzle core part can be produced each time. Therefore, we designed a mold in which multiple parts are in the same mold during casting, so that many parts can be produced at one time during casting. This initial arrangement, unreasonable design of the casting liquid inlet, and unreasonable arrangement of the mold core will lead to poor demolding when discharging after molding. Sometimes all the parts in a cavity will fall off when the mold is opened, and sometimes the remaining one or two will be stuck in the cavity, affecting the order of the assembly line operation and often causing errors. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a casting mold for a tire nozzle core, which can accelerate the demoulding speed and efficiency.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A casting mold for a tire nozzle core comprises an upper mold and a lower mold, wherein an upper punch is arranged on the lower surface of the upper mold, and a molding die cavity is arranged on the upper side of the lower mold, and the mold cavity is characterized in that an injection port is arranged at the middle position of the upper punch, and two U-shaped flow channels and two or more part cavities are arranged in the molding die cavity, the part cavities are arranged at equal intervals in the horizontal direction and are connected to the U-shaped flow channel, the part cavities are within the annular range of the U-shaped flow channel, the opening directions of the two U-shaped flow channels are mutually divergent, one left and one right, and the injection port is located in the middle position of the U-shaped flow channel.

[0007] Furthermore, the two rows of part cavities in each U-shaped flow channel are arranged symmetrically, and the tail ends of the part cavities are connected to the U-shaped flow channel.

[0008] Furthermore, a reinforcement flow channel is provided between two adjacent part cavities, and the reinforcement flow channel spans and connects the middle part of the part cavity in a dotted line manner.

[0009] Furthermore, a spherical cavity is provided at the connection point between the part cavity and the U-shaped flow channel.

[0010] Furthermore, an ejector hole is provided in the molding die cavity, an ejector is provided below the lower die, and the ejector passes through the ejector hole and pushes against the U-shaped flow channel.

[0011] The beneficial effects of the above design compared with the prior art are: the layout of the cavity is redesigned to connect the part cavities of all molded tire nozzle cores while saving the most casting liquid, so as to facilitate the high-quality and rapid demolding of small-volume tire nozzle core aluminum alloy parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the planar structure of a casting formed by a tire nozzle core mold in the background technology;

[0013] Figure 2 It is a schematic diagram of the planar structure of the utility model. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0015] like Figure 1 , Figure 2 The casting mold of the tire nozzle core shown in the figure includes an upper mold and a lower mold, the lower surface of the upper mold is provided with an upper punch, the upper side of the lower mold 4 is provided with a molding die cavity, an injection port 1 is provided at the middle position of the upper punch, two U-shaped runners 2 and two or more part cavities 3 are provided in the molding die cavity, the part cavities 3 are arranged at equal intervals laterally and are connected to the U-shaped runner 2, the part cavities 3 are within the annular range of the U-shaped runner 2, the opening directions of the two U-shaped runners 2 are opposite to each other, one left and one right, and the injection port 1 is located in the middle position of the U-shaped runner 2.

[0016] The two rows of part cavities 3 in each U-shaped flow channel 2 are arranged symmetrically, and the tail end of the part cavity 3 is connected to the U-shaped flow channel 2. Specifically, a spherical cavity 5 is provided at the connection between the part cavity 3 and the U-shaped flow channel 2. In this embodiment, two rows of part cavities are provided in the same U-shaped flow channel, and each row is provided with 5 part cavities, which is equivalent to casting 20 tire nozzle cores 6 at one time in one mold.

[0017] Preferably, since the tire nozzle core 6 is a slender part, it is connected together during demoulding and the entire cavity is pushed by a pin, so all parts can be demoulded. Because, in order to ensure the demoulding efficiency, a reinforcement flow channel 8 is provided between two adjacent part cavities, and the reinforcement flow channel 8 is connected to the middle part of the part cavity 3 in a dotted line manner. The dotted line connection method connects the tire nozzle cores in the same row with the smallest contact surface, and the tire nozzle core 6 can be removed separately by knocking the waste material of the connection point formed in the reinforcement flow channel.

[0018] Preferably, in order to demold quickly, an ejector hole 7 is provided in the molding die cavity, and an ejector is provided below the lower die, and the ejector passes through the ejector hole 7 and pushes against the U-shaped runner 2. The design structure of the ejector is already in use in the existing mold. We re-arrange the positions of the demolding ejector according to the characteristics of the U-shaped runner, and can arrange them in the spherical cavity position. When the upper and lower molds are opened, the castings in the cavity are connected together, and the individual tire nozzle cores are no longer demolded one by one, and the demolding speed and efficiency are accelerated. After demolding, the waste of the connection point formed in the reinforcement runner is directly knocked off, and then the tire nozzle core formed in the part cavity is knocked off. Finally, the bend formed in the U-shaped runner can be melted again and used as a casting material.

[0019] The above is a detailed introduction to the casting mold of the tire nozzle core provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, the utility model can also be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A casting mold for a tire nozzle core, comprising an upper mold and a lower mold, wherein the lower surface of the upper mold is provided with an upper convex mold, and the upper side of the lower mold is provided with a molding concave mold cavity, characterized in that: An injection port is provided in the middle position of the upper punch, and two U-shaped runners and two or more part cavities are provided in the molding die cavity. The part cavities are arranged at equal intervals laterally and are connected to the U-shaped runner. The part cavities are within the annular range of the U-shaped runner, and the opening directions of the two U-shaped runners are opposite to each other, one left and one right. The injection port is located in the middle position of the U-shaped runner.

2. The casting mold for the tire nozzle core according to claim 1, characterized in that: The two rows of part cavities in each U-shaped flow channel are arranged symmetrically, and the tail ends of the part cavities are communicated with the U-shaped flow channel.

3. The casting mold for the tire nozzle core according to claim 2, characterized in that: A reinforcement flow channel is arranged between two adjacent part cavities, and the reinforcement flow channel spans and connects the middle part of the part cavity in a dotted line manner.

4. The casting mold for the tire nozzle core according to claim 2, characterized in that: A spherical cavity is arranged at the connection point between the part cavity and the U-shaped flow channel.

5. The casting mold for the tire nozzle core according to claim 1, characterized in that: An ejector hole is arranged in the molding die cavity, an ejector is arranged below the lower die, and the ejector passes through the ejector hole and pushes against the U-shaped flow channel.

Images