Anti-blocking injection mold

Abstract

The utility model relates to the technical field of molds, in particular to an anti-blocking injection mold. The anti-blocking injection mold comprises a fixed mold part and a movable mold part which form a complete mold cavity, and further comprises an injection molding channel which comprises an injection molding part and a heat preservation ring, the injection molding part is located in the movable mold part and provides a channel for plastic to flow into the mold, the injection molding part comprises a main runner, a plurality of cold material openings are formed below the main runner, and the cold material openings are communicated with the heat preservation ring. The cold material port is used for storing cooled and solidified plastic of the injection molding part, and the heat preservation ring preserves heat of a main runner of the injection molding part and prevents the main runner from being cooled, solidified and blocked. According to the anti-blocking injection mold, the injection molding efficiency is effectively improved, and the mold maintenance workload is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an anti-clogging injection mold. Background Art

[0002] Injection molds are tools that are used in the plastic processing industry to match plastic molding machines and give plastic products a complete configuration and precise size. Due to the wide variety of plastics and processing methods, the structures of plastic molding machines and plastic products vary in complexity, and the types and structures of plastic molds are also diverse. The processing equipment corresponding to plastic injection molds is plastic injection molding machines. The plastic is first heated and melted in the heating barrel at the bottom of the injection machine, and then pushed by the screw or plunger of the injection machine, it enters the mold cavity through the injection machine nozzle and the pouring system of the mold. The plastic is cooled and hardened, and the product is demolded. Its structure is usually composed of molding parts, pouring systems, guide parts, ejection mechanisms, temperature control systems, exhaust systems, support parts, etc. The manufacturing material usually uses plastic mold steel modules, and the commonly used materials are mainly carbon structural steel, carbon tool steel, alloy tool steel, high-speed steel, etc. The injection molding processing method is usually only suitable for the production of thermoplastic products. Plastic products produced by injection molding technology are very extensive, from daily necessities to various complex machinery, electrical appliances, and transportation parts are all molded by injection molds. It is the most widely used processing method in the production of plastic products.

[0003] Since the injection molding process is carried out intermittently, the molten plastic is easy to solidify in the mold during the injection gap and block the main flow channel. The mold needs to be opened and the blockage removed before the injection molding work can continue, which seriously reduces the work efficiency and increases the labor intensity. Utility Model Content

[0004] The main purpose of the utility model is to provide an anti-clogging injection mold to solve the problem in the related art that molten plastic is easy to solidify in the mold during the injection gap and block the main flow channel.

[0005] In order to achieve the above-mentioned object, according to one aspect of the utility model, an anti-clogging injection mold is provided, comprising: a fixed mold part, including a fixed mold, the fixed mold provides half of the mold, and the fixed mold part provides support for the mold;

[0006] The movable mold part includes a movable mold, wherein the movable mold provides half of the model and forms a complete model when the movable mold is combined with the fixed mold;

[0007] The injection channel includes an injection part and a heat preservation ring. The injection part is located inside the movable mold part and provides a channel for plastic to flow into the mold. The injection part includes a main channel. A plurality of cold material ports are arranged below the main channel. The cold material ports are used to store the plastic cooled and solidified by the injection part. The heat preservation ring keeps the main channel of the injection part warm to avoid blockage due to cooling and solidification.

[0008] Furthermore, the injection channel comprises an injection port, which penetrates through the top of the movable mold part and communicates with the outside, and is connected to the top of the main channel, and the molten plastic flows into the main channel through the injection port.

[0009] Furthermore, a gate is fixedly provided on the left side of the bottom end of the injection port, and the gate is bent downward and embedded in the fixed mold part, and the fixed mold part wraps the gate and keeps it warm.

[0010] Furthermore, the insulation ring includes a plurality of connecting needles and a heating wire. The heating wire is fixedly arranged inside the insulation ring and can be connected to an external power source to generate heat.

[0011] Furthermore, the connecting needle is fixedly arranged on the inner wall of the heat preservation ring and penetrates into the inner wall of the main flow channel to provide heat for the plastic in the main flow channel.

[0012] Furthermore, a pressure plate is fixedly provided above the movable mold to press the movable mold toward the fixed mold.

[0013] Furthermore, a pressure plate cover is fixedly provided above the pressure plate to cover the pressure plate and increase the pressure of the movable mold at the same time.

[0014] Furthermore, a fixed mold is provided below the movable mold, and a load-bearing plate is fixedly provided below the fixed mold. The load-bearing plate and the pressure-bearing plate wrap the movable mold and the fixed mold in the middle to slow down the loss of heat.

[0015] Furthermore, a counterweight block is provided below the load-bearing plate, and there are two counterweight blocks in total, which increase the deadweight of the mold and lower its center of gravity.

[0016] Furthermore, the counterweight block is connected to the load-bearing plate by a long-rod screw, with a gap in the middle for air circulation, and a base is fixedly provided below the counterweight block.

[0017] Compared with the prior art, the utility model has the following beneficial effects: during injection molding, the movable mold part is removed from the fixed mold part and then installed again, so that the main channel is exposed for a period of time, and the plastic at the end thereof has been cooled and solidified and cannot flow into the mold for re-plasticization. Under the secondary extrusion of the injection molding machine, the new molten plastic pushes the cooled and solidified plastic forward to the cold material port, and the injection channel is reopened, so that the next round of injection molding can be smoothly carried out. There is no need to clean the end of the main channel before each injection molding, thereby improving work efficiency and reducing labor intensity; the gate is bent downward and buried in the fixed mold part, and the fixed mold part wraps the gate and keeps it warm to prevent the plastic in the gate from solidifying and clogging the injection channel; the counterweight block is connected to the load-bearing plate by a long rod screw, and a gap is left in the middle for air circulation, which accelerates the heat dissipation of the molded plastic model and shortens the injection molding interval; the insulation ring keeps the main channel warm to prevent the plastic in the main channel from solidifying and clogging the injection channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the movable mold part of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the fixed mold part of the utility model;

[0021] Figure 4 This is a schematic diagram of the injection channel structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the thermal insulation ring of the utility model.

[0023] Illustration Description:

[0024] 1. Moving mold part; 101. Moving mold; 102. Pressure plate; 103. Pressure plate cover;

[0025] 2. Fixed mold part; 201. Fixed mold; 202. Load-bearing plate; 203. Counterweight block; 204. Base;

[0026] 3. Injection channel; 301. Injection port; 302. Main channel; 303. Cold material port; 304. Gate; 305. Insulation ring; 3051. Connecting needle; 3052. Heating wire. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] See also Figures 1 to 5 , this embodiment provides an anti-clogging injection mold, including: a fixed mold part 2, including a fixed mold 201, the fixed mold 201 provides half of the model, and the fixed mold part 2 provides support for the mold;

[0029] The movable mold part 1 includes a movable mold 101. The movable mold 101 provides half of the model. The movable mold 101 and the fixed mold 201 form a complete model when combined. When the movable mold part 1 and the fixed mold part 2 are fixedly connected, molten plastic can be injected into the interior thereof for molding;

[0030] The injection channel 3 includes an injection part and a heat preservation ring 305. The injection part is located inside the movable mold part 1 and provides a channel for plastic to flow into the mold. The injection part includes a main channel 302. Two cold material ports 303 are arranged below the main channel 302. The cold material ports 303 are used to store the plastic cooled and solidified by the injection part. The two cold material ports 303 increase the volume for accommodating the solidified plastic, reduce the number of times the injection channel 3 is cleaned, and improve work efficiency. The heat preservation ring 305 keeps the main channel 302 of the injection part warm.

[0031] The injection channel 3 includes an injection port 301, which passes through the top of the movable mold part 1 and is connected to the outside. The injection port 301 is connected to the top of the main channel 302. The molten plastic flows into the main channel 302 through the injection port 301. The nozzle of the injection molding machine is inserted into the injection port 301 and injects the molten plastic into the injection channel 3. The diameter of the injection port 301 is larger than the diameter of the injection molding machine nozzle to prevent overflow.

[0032] A gate 304 is fixedly provided on the left side of the bottom end of the injection port 301. The gate 304 is bent downward and embedded in the fixed mold part 2. The fixed mold part 2 wraps the gate 304 and keeps it warm to prevent the plastic in the gate 304 from solidifying and blocking the injection channel 3 when the movable mold part 1 is removed for demoulding.

[0033] The insulation ring 305 includes a plurality of connecting needles 3051 and a heating wire 3052. The heating wire 3052 is fixedly arranged inside the insulation ring 305 and can be connected to an external power source to generate heat. After the heating wire 3052 is connected to the power source, it starts to generate heat, so that the temperature of the connecting needle 3051 increases.

[0034] The connecting needle 3051 is fixed on the inner wall of the insulation ring 305 and penetrates into the inner wall of the main channel 302 to provide heat for the plastic in the main channel 302. The cross-section of the connecting needle 3051 is triangular, which increases the contact surface with the main channel 302, provides more temperature for the plastic inside it, and prevents the plastic from solidifying and blocking the main channel 302.

[0035] A pressure plate 102 is fixedly provided above the movable mold 101 to press the movable mold 101 toward the fixed mold 201 to prevent the movable mold 101 from being squeezed open due to excessive pressure, resulting in injection failure.

[0036] A pressure plate cover 103 is fixed above the pressure plate 102 to cover the pressure plate 102 and increase the pressure of the movable mold 101. The temperature of the pressure plate 102 during injection molding is very high and it is easy to scald the workers. The pressure plate cover 103 covers the pressure plate 102 to prevent the workers from directly contacting the pressure plate 102 and being scalded.

[0037] A fixed mold 201 is provided below the movable mold 101, and a load-bearing plate 202 is fixedly provided below the fixed mold 201. The load-bearing plate 202 and the pressure plate 102 wrap the movable mold 101 and the fixed mold 201 in the middle to slow down the heat loss. The molten plastic slowly flows in the gap between the movable mold 101 and the fixed mold 201. If too much heat is lost in this process, the plastic will solidify prematurely and an ideal model cannot be formed.

[0038] A counterweight block 203 is provided below the load-bearing plate 202. There are two counterweight blocks 203 in total, which increase the deadweight of the mold and lower its center of gravity, thereby improving the stability of the mold.

[0039] The counterweight block 203 is connected to the load-bearing plate 202 by a long-rod screw, with a gap in the middle for air circulation. The air passes through the gap to take away excess heat, accelerate the cooling of the molded model, and improve work efficiency. A base 204 is fixed under the counterweight block 203 to provide support for the mold.

[0040] Insert the nozzle of the injection molding machine into the injection port 301, squeeze the molten plastic into the injection channel 3, the molten plastic is pressed into the main channel 302 and enters the gap between the fixed mold 201 and the movable mold 101 from the gate 304. After the gap is filled, turn off the injection molding machine and stop injecting the molten plastic into the mold. After cooling under pressure for a period of time, the plastic in the mold solidifies and forms. Unscrew the screws of the movable mold part 1, remove the movable mold part 1 from the fixed mold part 2, take out the model on the fixed mold part 2, and then install the movable mold part 1 back to the fixed mold part 2 and screw it in to fix it. During the second injection molding, since the movable mold part 1 is removed from the fixed mold part 2 and then installed again, the main channel 302 is exposed to the outside for a period of time, and the plastic at its end has been cooled and solidified and cannot flow into the mold for remolding. Under the secondary extrusion of the injection molding machine, the new molten plastic pushes the cooled and solidified plastic forward to the cold material port 303, and the injection channel 3 is reopened, and the next round of injection molding can be carried out smoothly. There is no need to clean the end of the main channel 302 before each injection molding, which improves work efficiency and reduces labor intensity.

[0041] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-clogging injection mold, characterized in that: include: A fixed mold part (2), comprising a fixed mold (201), wherein the fixed mold (201) provides half of the model, and the fixed mold part (2) provides support for the mold; The movable mold part (1) comprises a movable mold (101), wherein the movable mold (101) provides half of the model, and the movable mold (101) forms a complete model when combined with the fixed mold (201); The injection molding channel (3) comprises an injection molding part and a heat preservation ring (305). The injection molding part is located inside the movable mold part (1) and provides a channel for plastic to flow into the mold. The injection molding part comprises a main channel (302). A plurality of cold material ports (303) are arranged below the main channel (302). The cold material ports (303) are used to store plastic cooled and solidified in the injection molding part. The heat preservation ring (305) is used to keep the main channel (302) of the injection molding part warm.

2. The anti-clogging injection mold according to claim 1, characterized in that: The injection channel (3) comprises an injection port (301), the injection port (301) penetrates the top of the movable mold part (1) and communicates with the outside, the injection port (301) is connected to the top of the main channel (302), and the molten plastic flows into the main channel (302) through the injection port (301).

3. The anti-clogging injection mold according to claim 2, characterized in that: A gate (304) is fixedly provided on the left side of the bottom end of the injection port (301), and the gate (304) is bent downward and embedded in the fixed mold part (2). The fixed mold part (2) wraps around the gate (304) and keeps it warm.

4. The anti-clogging injection mold according to claim 3, characterized in that: The thermal insulation ring (305) comprises a plurality of connecting needles (3051) and a heating wire (3052). The heating wire (3052) is fixedly arranged inside the thermal insulation ring (305) and can be connected to an external power source to generate heat.

5. The anti-clogging injection mold according to claim 4, characterized in that: The connecting needle (3051) is fixedly arranged on the inner wall of the heat preservation ring (305) and penetrates into the inner wall of the main flow channel (302) to provide heat for the plastic in the main flow channel (302).

6. The anti-clogging injection mold according to claim 5, characterized in that: A pressure plate (102) is fixedly provided above the movable mold (101) to press the movable mold (101) toward the fixed mold (201).

7. The anti-clogging injection mold according to claim 6, characterized in that: A pressure plate cover (103) is fixedly provided above the pressure plate (102) to cover the pressure plate (102) and increase the pressure of the movable mold (101) at the same time.

8. The anti-clogging injection mold according to claim 7, characterized in that: A fixed mold (201) is provided below the movable mold (101), and a load-bearing plate (202) is fixedly provided below the fixed mold (201); the load-bearing plate (202) and the pressure plate (102) wrap the movable mold (101) and the fixed mold (201) in the middle to slow down the loss of heat.

9. The anti-clogging injection mold according to claim 8, characterized in that: A counterweight block (203) is provided below the load-bearing plate (202), and there are two counterweight blocks (203) in total, which increase the deadweight of the mold and lower its center of gravity.

10. The anti-clogging injection mold according to claim 9, characterized in that: The counterweight block (203) is connected to the load-bearing plate (202) via long-rod screws, with a gap in the middle for air circulation, and a base (204) is fixedly provided below the counterweight block (203).

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