EVA (Ethylene Vinyl Acetate) color mixing injection equipment

Abstract

EVA color mixing injection equipment relates to the field of injection molding equipment and comprises a main injection gun, a color mixing device and a connecting mechanism, the main injection gun comprises a main charging barrel, a main screw rod and a gun head, the main charging barrel is horizontally arranged, and a containing cavity used for conveying main materials is formed in the main charging barrel; the color mixing device comprises a color mixing material barrel, a color mixing screw and a driving mechanism, the color mixing material barrel is communicated with the main material barrel, and the containing cavity is divided into a conveying section extending from the tail end of the main material barrel to the joint of the main material barrel and the color mixing material barrel and a color mixing section extending from the front end of the main material barrel to the joint of the main material barrel and the color mixing material barrel; the color mixing screw rod is arranged in the color mixing material barrel; the driving mechanism is connected with the color mixing screw and drives the color mixing screw to rotate. The main material can be conveyed into the color mixing section through the conveying section to be mixed with the color mixing material input from the color mixing device, and the color mixing material is added midway, so that the color mixing material is output by the main injection gun after entering the main material and being not fully mixed, and a product with special patterns can be formed by injection molding.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding equipment, specifically an EVA color mixing injection device. Background Technology

[0002] Injection molding is a plastic processing method where plastic, after being plasticized in the heated barrel of an injection molding machine, is injected into the cavity of a closed mold through a plunger or reciprocating screw using an injection gun to form a finished product. This method can process products with complex shapes, precise dimensions, or inserts, and has high production efficiency. In some cases, to produce products with irregular patterns and similar appearances, it is necessary to add multiple different colored rubber materials at the injection gun inlet. These materials are mixed and stirred as the screw rotates forward, used to produce special patterns such as marble. However, the traditional method of directly adding the mixed material from the injection gun inlet can lead to problems. Due to the long stroke of the injection gun, the mixed material may not fully mix with the main material, resulting in indistinct or even absent patterns on the output product, which requires improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an EVA color mixing injection device.

[0004] The present invention adopts the following technical solution:

[0005] An EVA color mixing injection device includes a main injection gun, a color mixing device, and a connecting mechanism. The main injection gun includes a main barrel, a main screw, and a gun head. The main barrel is horizontally arranged and has an internal cavity for conveying the main material. The main screw is rotatably disposed in the cavity and can convey the material forward in a spiral motion. The gun head is disposed at the end of the main barrel and can output the mixed material outward. The color mixing device includes a color mixing barrel, a color mixing screw, and a driving mechanism. The color mixing barrel is connected to the main barrel. The cavity is divided into a conveying section extending from the end of the main barrel to the connection point with the color mixing barrel and a color mixing section extending from the front end of the main barrel to the connection point with the color mixing barrel. The color mixing screw is disposed in the color mixing barrel. The driving mechanism is connected to the color mixing screw and drives it to rotate.

[0006] Preferably, it also includes a connecting mechanism, which is connected between the color mixing cylinder and the main gun. The connecting mechanism includes a connecting hole and a connecting flange. The connecting hole is formed on the color mixing cylinder and located between the conveying section and the color mixing section, so that the inside of the main cylinder is in communication with the color mixing cylinder. The connecting flange is connected between the connecting hole and the bottom of the color mixing cylinder.

[0007] Preferably, the length ratio of the conveying section to the color mixing section is 2:1.

[0008] Preferably, the drive mechanism includes a mounting base for mounting the color mixing cylinder, a reducer disposed on the mounting base and connected to the color mixing screw, and a servo motor for driving the reducer to rotate.

[0009] Preferably, the color mixing cylinder is vertically arranged on the side of the main firing gun, and the mounting base, reducer and servo motor are arranged sequentially from the inside to the outside.

[0010] Preferably, the main gun further includes a retaining ring and a check ring, the retaining ring and the check ring being connected to each other and disposed between the main screw and the gun head.

[0011] Preferably, the front end of the gun head is further provided with a bend that bends and extends to the side, and a universal joint is provided on the bend, which is rotatably arranged around the bend.

[0012] Preferably, the side of the color mixing cylinder is provided with an inlet for feeding color mixing materials.

[0013] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: the main material can be conveyed to the mixing section through the conveying section and mixed with the mixing material input from the mixing device. Since the mixing material is added in the middle, the mixing material is not fully mixed after entering and is output by the main injection gun, and products with special patterns can be injection molded.

[0014] The conveying section is longer than the mixing section to prevent the mixing material from being fully mixed with the main material. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partially enlarged view of the present invention;

[0017] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0018] Figure 4 for Figure 2 Enlarged views of section B in the middle;

[0019] In the diagram: 1-Main gun; 11-Main cylinder; 111-Conveying section; 112-Mixing section; 12-Main screw; 13-Gun head; 14-Retaining ring; 15-Check ring; 16-Elbow; 17-Universal joint; 18-Sealing disc; 2-Mixing device; 21-Mixing cylinder; 22-Mixing screw; 23-Drive mechanism; 231-Mounting base; 232-Reducer; 233-Servo motor; 24-Feed inlet; 3-Connecting mechanism; 31-Connecting hole; 32-Connecting flange. Detailed Implementation

[0020] The present invention will be further described below through specific embodiments.

[0021] Reference Figures 1 to 4 As shown, an EVA color mixing injection device includes a main injection gun 1, a color mixing device 2, and a connecting mechanism 3.

[0022] The main discharge gun 1 includes a horizontally arranged main material cylinder 11, a main screw 12 disposed within the main material cylinder 11 for forward stirring and conveying of materials, and a discharge head 13 disposed at the end of the main material cylinder 11 for discharging mixed materials outward. The main material cylinder 11 has a receiving cavity for conveying the main material. Specifically, the main discharge gun 1 also includes a retaining ring 14 and a check ring 15. The retaining ring 14 and the check ring 15 are interconnected and disposed between the main screw 12 and the discharge head 13. The discharge head 13 also has a laterally bent elbow 16 at its front end, and a universal joint 17 is disposed on the elbow 16. The universal joint 17 is rotatably disposed around the elbow 16 for discharging the mixed material from various directions. The discharge head 13, retaining ring 14, and check ring 15 are common structures in the prior art, serving to prevent backflow, and are not the focus of this application. Their structure and selection will not be further described here, as those skilled in the art can readily understand them.

[0023] The color mixing device 2 includes a color mixing cylinder 21, a color mixing screw 22, and a drive mechanism 23. The color mixing cylinder 21 is vertically arranged on the side of the main cylinder 11, and the side of the color mixing cylinder 21 is provided with a feed port 24 for feeding color mixing material. The color mixing screw 22 is arranged in the color mixing cylinder 21. The drive mechanism 23 is connected to the color mixing screw 22 and drives it to rotate. The drive mechanism 23 includes a mounting base 231 arranged above the color mixing cylinder 21 for mounting the color mixing cylinder 21, a reducer 232 arranged on the mounting base 231 and connected to the color mixing screw 22, and a servo motor 233 for driving the reducer 232 to rotate. The mounting base 231, the reducer 232, and the servo motor 233 are arranged sequentially from bottom to top to reduce the installation difficulty. Specifically, the receiving cavity is divided into a conveying section 111 extending from the end of the main material cylinder 11 to the connection with the color mixing cylinder 21 and a color mixing section 112 extending from the front end of the main material cylinder 11 to the connection with the color mixing cylinder 21. The main material is input from the conveying section 111 into the color mixing section 112 to mix with the color mixing material and output from the end of the color mixing section 112.

[0024] The connecting mechanism 3 is connected between the color mixing device 2 and the main gun 1, and includes a connecting hole 31 and a connecting flange 32. The connecting hole 31 is formed between the conveying section 111 and the color mixing section 112, so that the inside of the main material cylinder 11 is connected to the outside. The connecting flange 32 is connected between the connecting hole 31 and the bottom of the color mixing cylinder 21, and the connecting flanges 32 are fixed together by bolts.

[0025] In this embodiment, the main material is conveyed forward from the conveying section 111 of the main material cylinder 11. During the conveying process, the mixing device 2, which is set at the connection between the conveying section 111 and the mixing section 112, inputs the mixing material into the receiving cavity, so that the main material and the mixing material in the main injection gun 1 are mixed in the mixing section 112 and output from the gun head 13. Since the mixing material is not fully mixed after entering, it is output from the main injection gun 1, and products with special patterns can be injection molded, which has high practicality.

[0026] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. An EVA color mixing injection apparatus, characterized by: The main gun includes a main barrel, a main screw rod and a gun head, the main barrel is horizontally arranged, and an accommodating cavity for conveying main materials is formed in the main barrel; the main screw rod is rotatably arranged in the accommodating cavity and can forwardly screw convey materials; the gun head is arranged at the end of the main barrel and can output mixed materials outward; the color mixing device includes a color mixing barrel, a color mixing screw rod and a driving mechanism, the color mixing barrel is communicated with the main barrel, and the accommodating cavity is divided into a conveying section extending from the end of the main barrel to the connecting position of the color mixing barrel and a color mixing section extending from the front end of the main barrel to the connecting position of the color mixing barrel; the color mixing screw rod is arranged in the color mixing barrel; and the driving mechanism is connected with the color mixing screw rod and drives the rotation of the color mixing screw rod.

2. The EVA mixing and injecting apparatus according to claim 1, wherein: The connecting mechanism is connected between the color mixing barrel and the main gun, includes a connecting hole and a connecting flange, the connecting hole is formed on the color mixing barrel and located between the conveying section and the color mixing section, so that the interior of the main barrel is communicated with the color mixing barrel; and the connecting flange is connected between the connecting hole and the bottom of the color mixing barrel.

3. The EVA mixing and injecting apparatus according to claim 1, wherein: The length ratio of the conveying section to the color mixing section is 2:

1.

4. The EVA mixing and injecting apparatus according to claim 1, wherein: The driving mechanism includes a mounting seat for mounting the color mixing barrel, a speed reducer arranged on the mounting seat and connected with the color mixing screw rod, and a servo motor for driving the rotation of the speed reducer.

5. An EVA mixing injection apparatus according to claim 4, wherein: The color mixing barrel is vertically arranged on the side of the main gun, and the mounting seat, the speed reducer and the servo motor are sequentially arranged from inside to outside.

6. The EVA mixing and injecting apparatus according to claim 1, wherein: The main gun further includes a check ring and a non-return ring, the check ring and the non-return ring are connected with each other and arranged between the main screw rod and the gun head.

7. An EVA mixing injection apparatus according to claim 6, wherein: The front end of the gun head is further provided with a bend extending to the side, a universal joint is arranged on the bend, and the universal joint is rotatably arranged around the bend.

8. The EVA mixing and injecting apparatus according to claim 1, wherein: A feeding port for feeding color mixing materials inward is arranged on the side of the color mixing barrel.

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