Anti-air-trapping automatic water feeder main body injection molding mold for pets

Abstract

An anti-air trapping injection molding mold for an automatic water feeder body for pets comprises a cavity plate and a core plate, a cavity compound plate is arranged on the cavity plate, a sprue is arranged on the cavity compound plate, a hot nozzle is connected below the sprue, a cavity concave surface is arranged in the cavity plate, a core insert is arranged on the core plate and extends into the cavity concave surface, and the hot nozzle is connected with the hot nozzle. The hot nozzle is arranged in the mold cavity plate and forms a mold cavity for forming the main body of the automatic water feeder for the pet, the hot nozzle is communicated with the mold cavity, an air trapping prevention structure is further arranged in the mold cavity plate, and an ejection structure is further arranged below the mold core plate. In the injection molding (filling) process, redundant air (high-pressure air) in the mold cavity is extruded out of the mold cavity through the air trapping prevention structure, an overflow effect is formed, the filling speed is increased, the mold cavity is uniformly filled, meanwhile, the pressure of the mold cavity is reduced, and the mold is prevented from expanding. And finally, after the main body of the automatic water feeder for the pet is formed, the main body is automatically ejected out of the mold by an ejection structure, automatic demolding is realized, the surface is highlight and traceless, the product quality is good, and the grade is high.

Description

Technical Field

[0001] The utility model relates to an injection molding mold for a main body of an automatic water feeder for pets that can prevent trapped air, and belongs to the field of injection molds. Background Art

[0002] Injection molds are used to produce plastic products, such as the main body of an automatic water dispenser for pets. According to the analysis of product structure and appearance, the injection mold of the existing technology for this product adopts needle valve high-pressure injection molding, which can make the product surface bright and does not require subsequent painting. However, in actual production, when the molten (high-temperature) plastic raw material is quickly injected into the mold cavity through the valve needle, due to the temperature difference between the temperature in the mold cavity and the temperature of the molten plastic raw material, it is easy to cause high-pressure gas to be generated in the mold cavity, causing the mold to be trapped, thereby forming defects such as air marks on the surface of the product; at the same time, the air pressure is easy to cause uneven filling of the plastic raw material, and increase the injection pressure, causing the mold to swell, resulting in flash on the product. Summary of the invention

[0003] The utility model aims to overcome the shortcomings of the prior art and provides an injection molding mold for an automatic pet waterer body that prevents trapped air, in which an exhaust structure is arranged on the cavity side of the mold so that gas is automatically discharged out of the mold.

[0004] The technical solution of the injection molding mold for the main body of the automatic pet waterer with anti-air trapping is: it is characterized by comprising a cavity plate and a core plate, a cavity double plate is arranged on the cavity plate, a gate is arranged on the cavity double plate, a hot nozzle is connected under the gate, a cavity concave surface is arranged in the cavity plate, a core insert is arranged on the core plate, the core insert extends into the cavity concave surface and constitutes a mold cavity for molding the main body of the automatic pet waterer, the hot nozzle is connected to the mold cavity, an anti-air trapping structure is also arranged in the cavity plate, and an ejection structure is also arranged under the core plate.

[0005] The utility model has an injection molding mold for the main body of the automatic pet waterer with anti-air entrapment. During the injection molding, the molten plastic raw material is injected from the gate and then injected through the hot nozzle to fill the mold cavity. During the filling process, the excess air (high-pressure gas) in the mold cavity is squeezed out of the mold cavity through the anti-air entrapment structure, forming an overflow effect, which speeds up the filling speed and makes the mold cavity fill evenly. At the same time, it reduces the pressure of the mold cavity and avoids mold expansion. Finally, when the main body of the automatic pet waterer is formed, it is automatically ejected from the mold by the ejection structure to achieve automatic demoulding, and the surface is high-gloss and traceless, and the product quality is good and high-grade.

[0006] The utility model is an injection molding mold for the main body of an automatic pet waterer that prevents trapped air. The anti-trapped air structure includes an exhaust hole connected to the mold cavity in the mold cavity plate, and an exhaust pin is arranged in the exhaust hole. In the actual mold, the exhaust pin is blocked in the exhaust hole to prevent the plastic raw material from leaking out, but the excess gas is squeezed out of the mold cavity through the gap between the exhaust pin and the exhaust hole under high pressure, that is, to prevent trapped air. An exhaust outlet is arranged on the exhaust hole, and the exhaust outlet is located below the mold cavity double plate. The exhaust outlet is arranged below the mold cavity double plate, that is, the exhaust hole is located above the concave surface 7 of the mold cavity, close to the injection port of the hot nozzle, and this position is the last filling position, which can completely discharge the excess gas out of the mold cavity, and the high-pressure gas is blocked by the mold cavity double plate when it is discharged, and will not hurt people. There are 1 to 4 exhaust holes, and an exhaust pin is arranged in each exhaust hole, which can be set according to the actual situation (mold cavity size). The ejection structure includes a mold foot arranged under the core plate, a core bottom plate arranged under the mold foot, an upper ejector plate and a lower ejector plate arranged between the mold feet, an ejector connected to the upper ejector plate, and the ejector passes through the core plate and the core insert to cooperate with the mold cavity. After the product (the main body of the automatic water dispenser for pets) is injection molded, it needs to be demolded, and the core plate and the cavity plate are separated from the mold by the power of the injection molding machine, and the product remains on the core plate and the core insert. In the mold opening process, there is an ejector rod on the injection molding machine, which pushes under the lower ejector plate. Under the reaction of the ejector rod, the ejector is driven by the upper ejector plate. Since the ejector cooperates with the mold cavity, that is, the ejector pushes against the bottom surface of the molded product, the product is ejected out of the mold to achieve automatic demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of the injection molding mold for the main body of the automatic water dispenser for pets to prevent gas trapping;

[0008] Figure 2 It is a bottom view schematic diagram of the cavity plate of the utility model;

[0009] Figure 3 It is a schematic diagram of the assembly of the exhaust hole and the exhaust pin of the utility model. DETAILED DESCRIPTION

[0010] The utility model relates to an injection molding mold for the main body of an automatic water dispenser for pets to prevent gas trapping. Figure 1 — Figure 3As shown, it includes a cavity plate 1 and a core plate 2. A cavity double plate 3 is arranged on the cavity plate. A gate 5 is arranged on the cavity double plate. A hot nozzle 6 is connected below the gate. A cavity concave surface 7 is arranged in the cavity plate. A core insert 8 is arranged on the core plate 2. The core insert 8 extends into the cavity concave surface 7 and forms a mold cavity 9 for molding the main body of the automatic waterer for pets. The hot nozzle 6 is connected to the mold cavity 9. An anti-air entrapment structure is also arranged in the cavity plate 1. An ejection structure is also arranged below the core plate 2. During injection molding, the molten plastic raw material is injected from the gate 5 and then injected through the hot nozzle 6 to fill the mold cavity 9. During the filling process, the excess air (high-pressure gas) in the mold cavity is squeezed out of the mold cavity through the anti-air entrapment structure, forming an overflow effect, which speeds up the filling speed and makes the mold cavity filled evenly. At the same time, it reduces the pressure in the mold cavity and avoids mold expansion. Finally, after the main body of the automatic pet water feeder is formed, it is automatically ejected from the mold by the ejection structure to achieve automatic demoulding, and the surface is high-gloss and traceless, with good product quality and high grade. The anti-gas trapped structure includes an exhaust hole 10 connected to the mold cavity in the cavity plate 1, and an exhaust pin 11 is arranged in the exhaust hole. In the actual mold, the exhaust pin is blocked in the exhaust hole so that the plastic raw material will not leak out, but the excess gas is squeezed out of the mold cavity through the gap between the exhaust pin and the exhaust hole under high pressure, that is, to prevent gas trapped. An exhaust outlet 111 is arranged on the exhaust hole 10, and the exhaust outlet 111 is located below the cavity double plate 3. The exhaust outlet is arranged below the cavity double plate 3, that is, the exhaust hole is located above the cavity concave surface 7, close to the injection port of the hot nozzle, which is the last filling position, and the excess gas can be completely discharged from the mold cavity, and the high-pressure gas is blocked by the cavity double plate when it is discharged, so it will not hurt people. There are 1 to 4 exhaust holes 10, and an exhaust pin 11 is arranged in each exhaust hole, which can be arranged according to the actual situation (size of the mold cavity). The ejection structure includes a mold foot 12 arranged under the core plate 2, a core bottom plate 13 arranged under the mold foot, an upper ejector plate 15 and a lower ejector plate 16 arranged between the mold feet, and an ejector 17 connected to the upper ejector plate 15, and the ejector 17 passes through the core plate 2 and the core insert 8 and cooperates with the mold cavity 9. After the product (the main body of the automatic water dispenser for pets) is injection molded, it needs to be demoulded. The core plate and the cavity plate are separated from the mold by the power of the injection molding machine, and the product remains on the core plate and the core insert. In the process of opening the mold, there is an ejector rod on the injection molding machine, which pushes under the lower ejector plate. Under the reaction of the ejector rod, the ejector is driven by the upper ejector plate. Because the ejector cooperates with the mold cavity, that is, the ejector pushes on the bottom surface of the molded product, the product is ejected out of the mold to achieve automatic demoulding.

Claims

1. The main body injection molding mold of the automatic water dispenser for pets to prevent trapped gas is characterized by The invention comprises a cavity plate (1) and a core plate (2), wherein a cavity double plate (3) is arranged on the cavity plate, a gate (5) is arranged on the cavity double plate, a hot nozzle (6) is connected below the gate, a cavity concave surface (7) is arranged in the cavity plate, a core insert (8) is arranged on the core plate (2), the core insert (8) extends into the cavity concave surface (7) and forms a mold cavity (9) for molding the main body of an automatic water dispenser for pets, the hot nozzle (6) is connected to the mold cavity (9), an air entrapment prevention structure is also arranged in the cavity plate (1), and an ejection structure is also arranged below the core plate (2).

2. The main body injection molding mold of the automatic water dispenser for pets to prevent gas trapping as claimed in claim 1, characterized in that The anti-air trapped structure comprises an exhaust hole (10) arranged in the cavity plate (1) and communicating with the mold cavity, and an exhaust pin (11) is arranged in the exhaust hole.

3. The main body injection molding mold of the automatic water dispenser for pets to prevent gas trapping as claimed in claim 2, characterized in that An exhaust outlet (111) is provided on the exhaust hole (10), and the exhaust outlet (111) is located below the cavity composite plate (3).

4. The main body injection molding mold of the automatic water dispenser for pets to prevent gas trapping as claimed in claim 2, characterized in that There are 1 to 4 exhaust holes (10), and an exhaust pin (11) is arranged in each exhaust hole.

5. The main body injection molding mold of the automatic water dispenser for pets to prevent gas trapping as claimed in claim 1, characterized in that The ejection structure comprises a mold foot (12) arranged under the core plate (2), a core bottom plate (13) arranged under the mold foot, an upper ejector plate (15) and a lower ejector plate (16) arranged between the mold feet, an ejector pin (17) connected to the upper ejector plate (15), and the ejector pin (17) passes through the core plate (2) and the core insert (8) to cooperate with the mold cavity (9).

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