Physical foaming molding injection device of injection molding machine

Abstract

The invention relates to a physical foaming molding injection device of an injection molding machine, which comprises a non-return injection nozzle, an injection pipe, a gas cylinder and a driving source, and is characterized in that the non-return injection nozzle is provided with an injection nozzle head and a non-return rod; one side of the injection pipe is fixedly connected with the non-return nozzle, a mixing rod, a screw rod, a first countercurrent ring, a second countercurrent ring, a first baffle ring seat and a second baffle ring seat are arranged in the injection pipe, a plurality of bumps are arranged on the outer ring wall of the mixing rod, and a mixing chamber is formed between the mixing rod and the inner wall of the injection pipe; a feeding cavity is formed between the screw rod and the inner wall of the injection pipe; an air inlet hole and a feeding hole are formed in the outer pipe wall of the injection pipe; the gas cylinder is provided with a gas pipe and a control valve, and the gas pipe is connected to the gas inlet hole of the injection pipe; the driving source is arranged at and connected with the rear end of the screw rod; the mixing chamber is sealed by the first countercurrent ring and the second countercurrent ring, so that the plastic and the gas can be fully mixed and stirred by the mixing rod, the processing time can be saved, the product is light, the plastic cost is reduced, and the environment is protected.

Description

Technical field

[0001] The present invention provides a physical foaming molding injection device for an injection molding machine, particularly a structure that enables plastic and gas to be fully mixed and stirred, thereby saving process time, making products lightweight, reducing plastic costs, and being environmentally friendly. [Background Technology]

[0002] With the increasing diversification and customization of plastic products, foam molding products are being developed. These products are made by molding plastic containing microbubbles and then cooling and solidifying them. They have the advantages of being lightweight, highly tough, and noise-reducing. They can also save manufacturing time and reduce the use of plastic. They have been widely used in various plastic product manufacturing fields, such as shoemaking, blow molding, the automotive industry, and electrical appliances. Foam molding is divided into chemical foaming and physical foaming. Chemical foaming is made by adding chemical foaming agents to plastic, which pollutes the environment and cannot be recycled. Physical foaming, on the other hand, is made by mixing plastic with gas without the addition of chemicals, making the process environmentally friendly and the plastic product recyclable.

[0003] Conventional physical foam molding processes often suffer from poor sealing during the injection molding process when melting plastic, leading to gas leakage or insufficient pressure. This prevents the plastic and gas from being fully mixed and agitated, resulting in uneven distribution of bubbles within the foamed plastic and a low product yield. This problem clearly needs improvement. [Summary of the invention]

[0004] The present invention provides a physical foaming molding device for an injection molding machine that allows plastic and gas to be fully mixed and stirred in a well-sealed environment, thereby saving process time, making products lightweight, reducing plastic costs, and being environmentally friendly.

[0005] In order to achieve the above-mentioned purpose, the physical foaming molding injection device of the injection molding machine of the present invention includes a non-return nozzle, a shooting tube, a gas cylinder and a driving source, wherein the non-return nozzle has a nozzle head and a non-return rod, and a shooting hole is provided at one end of the nozzle head, and the non-return rod can move and extend in the shooting hole of the nozzle head; one side of the shooting tube is connected and fixed to the non-return nozzle, and a mixing rod, a screw rod, a first countercurrent ring, a second countercurrent ring, a first baffle ring seat and a second baffle ring seat are provided inside the mixing rod, the front end of the mixing rod has a shooting screw head, and the rear end is fixedly penetrated with the screw rod, the shooting screw head is fixedly penetrated with the mixing rod, and the outer ring wall of the mixing rod is provided with a plurality of protrusions, which can shorten the time for uniform mixing of the plastic, and the mixing rod and A mixing chamber is formed between the inner walls of the shooting tube; a feeding chamber is formed between the screw rod and the inner wall of the shooting tube, and the outer tube wall of the shooting tube is provided with an air inlet and a feeding hole, the air inlet hole penetrates into the mixing chamber, and the feeding hole penetrates into the feeding chamber; the first countercurrent ring is arranged between the shooting screw head and the first baffle ring seat; the first baffle ring seat is used to fix the first countercurrent ring; the second countercurrent ring is arranged between the mixing rod and the screw rod; the second baffle ring seat is used to fix the second countercurrent ring; the gas cylinder has an air pipe and a control valve, the air pipe is connected to the air inlet of the shooting tube, and the control valve is used to adjust the gas of the gas cylinder to supply the mixing chamber with a better gas flow rate and pressure poundage; the driving source is arranged at the rear end of the screw rod and is connected.

[0006] The physical foaming molding injection device of the above-mentioned injection molding machine, wherein a material barrel is connected above the material inlet.

[0007] The physical foaming molding injection device of the above-mentioned injection molding machine, wherein the gas cylinder is refillable with nitrogen

[0008] (N2).

[0009] The physical foaming molding injection device of the above-mentioned injection molding machine, wherein the gas cylinder can be filled with carbon dioxide (CO2).

[0010] In the physical foaming molding injection device of the above-mentioned injection molding machine, the driving source can be a material storage servo motor.

[0011] Based on the above, the mixing chamber is sealed by the first countercurrent ring and the second countercurrent ring, so that the mixing rod can fully mix and stir the plastic and gas, which can save process time, make the product lightweight, reduce plastic costs and be environmentally friendly.

[0012] The present invention has the following advantages and effects:

[0013] 1. The first counter-current ring and the second counter-current ring are used to seal the mixing chamber, so that the mixing rod can fully mix and stir the plastic and gas, thereby saving process time.

[0014] 2. When the anti-return nozzle leaves the mold, the anti-return rod can fit tightly with the inner diameter inclined surface of the nozzle head to prevent the injected plastic from flowing back.

[0015] 3. The outer ring wall of the mixing rod is provided with a plurality of protrusions, which can shorten the time for uniformly stirring the plastic.

Brief Description of the Drawings

[0016] Figure 1 It is a perspective view of an embodiment of the present invention.

[0017] Figure 2 It is a three-dimensional exploded view of an embodiment of the present invention.

[0018] Figure 3 It is a combined cross-sectional view of an embodiment of the present invention.

[0019] Figure 4 It is a perspective view of the interior of the shooting tube according to an embodiment of the present invention.

[0020] Figure 5 It is a partial enlarged cross-sectional view of a mixing rod according to an embodiment of the present invention.

[0021] Figure 6 It is an enlarged partial cross-sectional view of the spiral rod according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the combined cross-sectional action of an embodiment of the present invention.

[0023] The numbers in the figure are explained as follows:

[0024] Injection device 1, backflow prevention nozzle 2, nozzle head 20, backflow prevention rod 21

[0025] Injection hole 22 Injection tube 3 Mixing rod 30 Screw rod 31

[0026] First counter-flow ring 32 Second counter-flow ring 33 First baffle ring seat 34 Second baffle ring seat 35

[0027] Injection screw head 36 Bump 37 Mixing chamber 38 Feeding chamber 39

[0028] Inlet hole 390 Feed hole 391 Pressurized area 392 Gas cylinder 4

[0029] Air pipe 40 Control valve 41 Drive source 5 Material barrel 6

[0030] Mold 7 [Specific implementation method]

[0031] The articles "a," "an," and "the" mentioned in the detailed description and patent application scope can refer to a single or plural number, unless otherwise specified in the specification.

[0032] See also Figures 1 to 7 As shown, the physical foaming molding injection device 1 of the injection molding machine of the embodiment of the present invention includes a non-return nozzle 2, a shot tube 3, a gas cylinder 4 and a driving source 5, wherein the non-return nozzle 2 has a nozzle head 20 and a non-return rod 21, and a shot hole 22 is provided at one end of the nozzle head 20. The non-return rod 21 can move and extend in the shot hole 22 of the nozzle head 20. The non-return rod 21 can fit tightly with the inner diameter inclined surface of the nozzle head 20 to prevent the injected plastic from flowing back and store the plastic of the next stroke at the same time to prepare for the next injection action; one side of the shot tube 3 is connected and fixed to the non-return nozzle 2, and has a mixing rod 30, a spiral Rod 31, a first countercurrent ring 32, a second countercurrent ring 33, a first baffle ring seat 34 and a second baffle ring seat 35, the front end of the mixing rod 30 has a shot screw head 36, the rear end is fixed with the screw rod 31, the shot screw head 36 is fixed with the mixing rod 30, the outer ring wall of the mixing rod 30 is provided with a plurality of protrusions 37, which can shorten the time for uniform mixing of the plastic, and a mixing chamber 38 is formed between the mixing rod 30 and the inner wall of the shot tube 3; a feeding chamber 39 is formed between the screw rod 31 and the inner wall of the shot tube 3, and the outer wall of the shot tube 3 is provided with an air inlet 390 and a feed hole 391, the air inlet 390 passes through the mixing chamber The feeding hole 391 is connected to the feeding chamber 39, and a barrel 6 is connected above the feeding hole 391 so that the plastic in the barrel 6 is poured into the feeding chamber 39. The plastic is fed into the mixing chamber 38 by the rotating screw rod 31 through the gap between the second counter-flow ring 33 and the second baffle ring seat 35; the first counter-flow ring 32 is arranged between the injection screw head 36 and the first baffle ring seat 34; the first baffle ring seat 34 is used to fix the first counter-flow ring 32; the second counter-flow ring 33 is arranged between the mixing rod 30 and the screw rod 31; the second baffle ring seat 35 is used to fix the second counter-flow ring 33; the gas cylinder 4 has an air pipe 40 and a The control valve 41, the air pipe 40 is connected to the air inlet 390 of the shooting tube 3, and the gas is injected into the mixing chamber 38. The gas can be nitrogen (N2) or carbon dioxide (CO2), so that the mixing rod 30 can fully mix and stir the plastic and the gas in the mixing chamber 38. The control valve 41 is used to adjust the gas in the gas cylinder 4 to supply the mixing chamber with a better gas flow rate and pressure. The driving source 5 is a storage servo motor, which is located at the rear end of the screw rod 31 and is connected to drive the screw rod 31 and the mixing rod 30, and make the injection device 1 accurately align with the mold 7, which can bear the axial force load generated by the injection molding machine during the injection molding product process.

[0033] See also Figure 7As shown, when actuated, the plastic in the barrel 6 enters the feeding chamber 39 through the feed hole 391, and the plastic is delivered to the mixing chamber 38 by the rotating screw rod 31 through the gap between the second countercurrent ring 33 and the second baffle ring seat 35, and gas is injected from the air inlet 390, so that the mixing rod 30 can fully mix and stir the plastic and gas in the mixing chamber 38, and then the mixed plastic is delivered to a pressurized area 392 through the gap between the first countercurrent ring 32 and the first baffle ring seat 34 by the injection screw head 36, and finally the anti-backflow nozzle 2 injects the plastic into a mold 7 to complete the physical foaming molding product.

Claims

1. A physical foaming molding injection device of an injection molding machine, characterized in that: Include: A backflow prevention nozzle having a nozzle head and a backflow prevention rod, wherein an injection hole is provided at one end of the nozzle head; The cam is fixed to the inner wall of the mixing rod, and the cam is fixed to the inner wall of the mixing rod, and the cam is fixed to the inner wall of the mixing rod, wherein ... outer wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, the cam is fixed to the inner wall of the mixing rod, a gas cylinder having a gas pipe and a control valve, wherein the gas pipe is connected to the gas inlet of the injection tube, and the control valve is used to adjust the gas in the gas cylinder to provide the mixing chamber with an optimal gas flow rate and pressure; and A driving source is provided at the rear end of the screw rod and is connected thereto.

2. The physical foaming molding injection device of the injection molding machine according to claim 1, characterized in that: A material barrel is connected above the material inlet.

3. The physical foaming molding injection device of the injection molding machine according to claim 1, characterized in that: The gas cylinder is refillable with nitrogen (N2).

4. The physical foaming molding injection device of the injection molding machine according to claim 1, characterized in that: The cylinder is refillable with carbon dioxide (CO2).

5. The physical foaming molding injection device of the injection molding machine according to claim 1, characterized in that: The driving source is a storage servo motor.

Images