A casting of injection valve plate for injection molding machines based on wet molding sand process

Abstract

This utility model relates to the field of injection molding machine parts manufacturing technology, and in particular to an injection valve plate casting for injection molding machines based on the wet casting sand process. It mainly addresses the problem that existing injection valve plate castings for injection molding machines are mostly produced using continuous casting, resulting in a plate-like or blocky shape that requires subsequent secondary processing and cutting of the outer surface. Furthermore, the lack of rounded corners increases oil resistance during use and also increases costs. The proposed technical solution is as follows: The injection valve plate casting body includes valve plate casting gaps distributed on the outer surface wall of the body to reduce weight. This utility model reduces the need for punching and trimming the outer surface of the injection valve plate casting body. Simultaneously, the distribution of these gaps reduces weight and material usage, lowering costs. Furthermore, the rounded corners of the oil passages help reduce oil flow resistance during use.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine parts manufacturing technology, and in particular to an injection valve plate casting for an injection molding machine based on the wet molding sand process. Background Technology

[0002] Injection valve plate castings for injection molding machines are typically block-shaped. They are often produced using continuous casting, a process suitable for producing castings with regular shapes and simple structures. The block shape facilitates continuous casting, resulting in higher mold design and production efficiency. Injection valve plate castings are commonly used in the injection system of injection molding machines, working in conjunction with the mold. They are an indispensable component of the injection molding process. By optimizing the internal oil channels and gating system, valve plate castings can achieve more precise plastic filling and reduce product defects.

[0003] However, most existing injection valve plate castings for injection molding machines are produced using continuous casting, resulting in a plate-like or block-like shape that requires secondary processing and cutting of the outer surface. In addition, the lack of rounded corners increases oil resistance during use and also increases costs. Therefore, we propose an injection valve plate casting for injection molding machines based on the wet molding sand process. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an injection valve plate casting for injection molding machines based on the wet molding sand process.

[0005] The technical solution of this utility model is as follows: an injection valve plate casting for an injection molding machine based on the wet molding sand process, including an injection valve plate casting body. The outer surface wall of the injection valve plate casting body has valve plate casting missing parts distributed to reduce weight. The injection valve plate casting body is provided with a main oil passage and an auxiliary oil passage for auxiliary medium flow. The corners of the main oil passage and the auxiliary oil passage are provided with rounded corners to reduce oil resistance.

[0006] Preferably, the missing portions of the valve plate castings are distributed at the top and bottom walls of the injection valve plate casting body of the injection molding machine.

[0007] Preferably, the main oil passage and the auxiliary oil passage are connected.

[0008] Preferably, the outer wall of the injection valve plate casting body of the injection molding machine is provided with a first inlet, a second inlet, a first outlet, a second outlet and an exhaust pressure reducing hole.

[0009] Preferably, the first outlet and the first inlet are both connected to the main oil passage, while the second inlet and the second outlet are connected to the auxiliary oil passage.

[0010] Preferably, the two exhaust pressure relief holes are distributed at the main oil passage and the auxiliary oil passage, and the exhaust pressure relief holes are connected to the interior of the auxiliary oil passage and the main oil passage corresponding to their positions.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This invention utilizes the distribution of the missing portions of the valve plate casting on the outer surface wall of the injection valve plate casting body of the injection molding machine. This distribution of the missing portions solves the problem of wear caused by the need for cutting and trimming the edges and corners of conventional block-shaped injection valve plate castings during production. It reduces the number of cutting and trimming steps, shortens the production cycle, and reduces the overall weight of the injection valve plate casting body, thus reducing costs. At the same time, the distribution of the rounded corners of the oil passages reduces the oil flow resistance of the main and auxiliary oil passages during use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an injection valve plate casting for an injection molding machine based on the wet molding sand process;

[0014] Figure 2 yes Figure 1 A perspective three-dimensional structural diagram;

[0015] Figure 3 yes Figure 1 A cross-sectional three-dimensional structural diagram.

[0016] Reference numerals: 1. Injection valve plate casting body of injection molding machine; 2. Missing part of valve plate casting; 3. Main oil passage; 4. Rounded corner of oil passage; 5. Auxiliary oil passage. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example

[0019] like Figures 1 to 3As shown, this utility model proposes an injection valve plate casting for an injection molding machine based on a wet-sand molding process. The injection valve plate casting body 1 is made of vermicular graphite cast iron. The main oil passage 3 and auxiliary oil passage 5 are connected and arranged within the injection valve plate casting body 1. Simultaneously, it is directly formed in the wet-sand molding process using a sand core, resulting in rounded corners 4 at the corners of the main oil passage 3 and auxiliary oil passage 5. This allows for direct forming during the manufacturing process of the injection valve plate casting body 1, eliminating the need for subsequent separate processing. Furthermore, the rounded corners 4 reduce oil resistance at the corners of the main oil passage 3 and auxiliary oil passage 5 when guiding the medium, thereby improving the operating efficiency of the injection valve plate casting body 1 during use. Valve plate casting missing parts 2 are arranged on the outer surface wall of the injection valve plate casting body 1, with multiple valve plate casting missing parts 2 distributed throughout the injection valve plate casting body. The distribution of the missing parts 2 of the valve plate casting at the top and bottom walls of the injection valve plate casting body 1 reduces the need for punching on the outer surface of the conventional block-shaped injection valve plate casting body 1 after production, which would increase processing steps, cause tool wear, and extend tool processing time. Since the missing parts 2 of the valve plate casting can be formed during the casting process of the injection valve plate casting body 1, it can reduce the overall weight of the injection valve plate casting body 1 and reduce the cost required for casting the injection valve plate casting body 1. The first inlet and the first outlet connected to the main oil passage 3 can cooperate with the second inlet and the second outlet connected to the auxiliary oil passage 5 to enable the use of the injection valve plate casting body 1. The two pressure relief and exhaust holes opened on the outer surface wall of the injection valve plate casting body 1 are respectively connected to the main oil passage 3 and the auxiliary oil passage 5 to facilitate exhaust and pressure relief.

[0020] In this embodiment, the missing portion 2 of the valve plate casting is distributed on the outer surface wall of the injection valve plate casting body 1 of the injection molding machine. This reduces the material usage of the missing portion 2 during the casting process, lightens the overall weight of the injection valve plate casting body 1 after casting, and facilitates its use. Furthermore, the absence of the missing portion 2 reduces the need for subsequent separate cutting and trimming of the conventional block-shaped injection valve plate casting body 1, thus avoiding the subsequent processing steps of the conventional block-shaped injection valve plate casting body 1 and the problem of severe wear caused by tool cutting. This reduces processing steps, shortens production time, and improves production efficiency. At the same time, the distribution of the rounded corner portion 4 of the oil passage reduces oil resistance between the main oil passage 3 and the auxiliary oil passage 5 during use, which is beneficial to improving the flow of the medium in the injection valve plate casting body 1 during use.

[0021] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An injection valve plate casting for an injection molding machine based on a wet molding sand process, comprising an injection valve plate casting body (1), characterized in that: The outer surface wall of the injection valve plate casting body (1) of the injection molding machine has valve plate casting missing parts (2) distributed to reduce weight. The injection valve plate casting body (1) of the injection molding machine is provided with a main oil passage (3) and an auxiliary oil passage (5) for auxiliary medium flow. The corner walls of the main oil passage (3) and the auxiliary oil passage (5) are provided with rounded corner parts (4) to reduce oil resistance.

2. The injection valve plate casting for an injection molding machine based on the wet molding sand process according to claim 1, characterized in that, Multiple sets of missing valve plate castings (2) are distributed on the top and bottom walls of the injection valve plate casting body (1) of the injection molding machine.

3. The injection valve plate casting for an injection molding machine based on the wet molding sand process according to claim 1, characterized in that, The main oil passage (3) and the auxiliary oil passage (5) are connected.

4. The injection valve plate casting for an injection molding machine based on the wet molding sand process according to claim 1, characterized in that, The outer wall of the injection valve plate casting body (1) of the injection molding machine is provided with a first inlet, a second inlet, a first outlet, a second outlet and an exhaust pressure reducing hole.

5. The injection valve plate casting for an injection molding machine based on the wet molding sand process according to claim 4, characterized in that, The first outlet and the first inlet are connected to the main oil passage (3), while the second inlet and the second outlet are connected to the auxiliary oil passage (5).

6. The injection valve plate casting for an injection molding machine based on the wet molding sand process according to claim 4, characterized in that, The two exhaust pressure relief holes are located at the main oil passage (3) and the auxiliary oil passage (5), and the exhaust pressure relief holes are connected to the auxiliary oil passage (5) and the main oil passage (3) at the corresponding positions.

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