Double colored plastic injection machine

Abstract

The utility model discloses a double-colored injection molding machine, which belongs to the field of injection molding and comprises a driving component, a feeding component is arranged in front of the driving component, a plasticizing component is arranged in the feeding component, a rotating rod, a spiral blade and a material pushing head are driven by a propelling sleeve to move forwards or backwards, and when the rotating rod, the spiral blade and the material pushing head move forwards, the plasticizing component is arranged in the feeding component. The two shaft rods can drive the two connecting rods to rotate correspondingly, the connecting rods drive the rotating rod, the spiral blade and the material pushing head to rotate, and the spiral blade can turn and stir plastic particles in the rotating process, so that the plastic particles can make full contact with the inner wall of the material melting barrel, and the plastic particles are prevented from falling off from the inner wall of the material melting barrel. And meanwhile, the molten plastic can be conveyed to the front end of the material melting barrel, after the molten plastic reaches a certain amount, the molten plastic can be conveniently fed into the injection assembly through the pushing sleeve at the same time subsequently, and the requirement for quantitative injection molding is met.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and more specifically, to a two-color injection molding machine. Background Technology

[0002] An injection molding machine is a primary molding equipment used to mold thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molds. The working process of an injection molding machine mainly includes stages such as plasticizing, injection, pressure holding, cooling, and demolding. First, the plastic raw material is added to the barrel in granular form. There is a heating device outside the barrel, which melts the plastic raw material to achieve a plasticized state. The screw rotates inside the barrel, conveying, compacting, and uniformly mixing the plastic to achieve plasticizing. After the plastic is plasticized, it is injected into the mold for cooling and shaping. However, a typical injection molding machine injects a single material, resulting in a single color.

[0003] Chinese patent application number CN202421786770.9 discloses an injection structure for a two-color injection molding machine. This solution uses a first and second heating unit to melt granular raw materials, and a pusher component, combined with a first and second injection tube, pushes the raw materials into a connecting tube. A partition separates the raw materials, which flow out from both sides of the partition, enabling gradient color processing in two-color injection molding. However, two-color injection molding machines typically require two different colored materials. Depending on the workpiece being molded, the two colors of plastic need to be mixed or not mixed. Existing injection molding machines plasticize two different materials using two barrels, then inject them simultaneously or sequentially through the same nozzle, without the option to choose whether to mix or not. Two machines are required to complete this process. Furthermore, two-color injection molding machines require a fixed amount of plastic injected each time; inconsistent injection amounts of the two colors will result in uneven color mixing.

[0004] Therefore, a two-color injection molding machine is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a two-color injection molding machine. The machine uses a pusher sleeve to drive a rotating rod, a spiral blade, and a pusher head to move forward or backward. When the rotating rod, spiral blade, and pusher head move forward, molten plastic is pushed from the melting cylinder into the injection assembly. Two shafts can drive two connecting rods to rotate, which in turn drive the rotating rod, spiral blade, and pusher head to rotate. During the rotation of the spiral blade, the plastic granules are agitated, ensuring they fully contact the inner wall of the melting cylinder, facilitating heating and melting. Simultaneously, the molten plastic is conveyed to the front end of the melting cylinder. Once a certain amount of molten plastic has been produced, it can be simultaneously fed into the injection assembly via the pusher sleeve, achieving the required quantitative injection molding.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A two-color injection molding machine includes a drive assembly, a feeding assembly at the front of the drive assembly, a plasticizing assembly inside the feeding assembly, a through-feed assembly connected to the drive assembly, and an injection assembly at the front end of the plasticizing assembly. The drive assembly includes a housing, an inner housing fixedly connected inside the housing, a first motor fixedly connected inside the inner housing, a drive shaft fixedly connected to the drive end of the first motor, a push sleeve slidably connected to the middle of the drive shaft, a spiral groove formed in the middle of the push sleeve, a slide rod slidably connected inside the groove, and the slide rod fixedly connected to the inner wall of the inner housing.

[0008] Furthermore, a bracket is rotatably connected to the front end of the propulsion sleeve, the bracket is slidably connected to the inner shell, a spring is fixedly connected to the front end of the bracket, and the end of the spring away from the bracket is fixedly connected to the inner wall of the inner shell.

[0009] By using the rotating connection between the push sleeve and the bracket, and the sliding connection between the bracket and the inner shell, combined with the elasticity of the spring, when the push sleeve moves under the drive of the transmission shaft, the spring can buffer, reset, and assist in adjusting the position of related components, ensuring that the connection and movement between the components are more stable and coordinated, thereby ensuring the normal operation of the entire drive assembly and the two-color injection molding machine.

[0010] Furthermore, a second motor is fixedly connected inside the housing, and a transmission gear is fixedly connected to the transmission end of the second motor. A pair of symmetrical driven gears mesh in the middle of the transmission gear. The driven gears are rotatably connected to the housing, and a shaft is fixedly connected to the front end of the driven gears.

[0011] Power is provided by a second motor, which drives the transmission gear to rotate. The transmission gear and a pair of driven gears mesh to transmit power to the driven gears, which in turn causes the shaft fixedly connected to the front end of the driven gear to rotate. The rotation of the shaft can provide power to the components connected to it, thereby driving the relevant components to complete operations such as stirring plastic granules.

[0012] Furthermore, the feeding assembly includes a support mounted on the front side of the housing, and a pair of symmetrical hoppers are fixedly connected to the top of the support.

[0013] Furthermore, the plasticizing component includes a pair of symmetrical melting cylinders, one end of which passes through the support and abuts against the outer shell. The melting cylinder is fixedly connected to the support, and the top of the melting cylinder is provided with a feed port adapted to the hopper. The feed port is connected to the hopper.

[0014] Furthermore, a rotating rod is rotatably connected inside the melting cylinder, and a spiral blade is fixedly connected to the middle of the rotating rod. The middle of the spiral blade is in contact with the inner wall of the melting cylinder. A connecting rod is fixedly connected to the rear end of the rotating rod. The connecting rod passes through the melting cylinder, the outer shell, and the bracket, extending into the interior of the shaft. The connecting rod is slidably connected to the shaft. A pusher head is fixedly connected to the front end of the rotating rod. Through holes are opened at both ends of the pusher head. A backstop plate is hinged inside the through holes. The pusher head is conical in shape.

[0015] Furthermore, the injection assembly includes a distribution tank fixedly installed at the front end of the melting cylinder. The distribution tank has a material cavity inside. A housing is fixedly connected to the front end of the distribution tank. A motor is fixedly connected inside the housing. A worm gear is fixedly connected to the transmission end of the motor. A worm wheel meshes with the middle of the worm gear. A rotating shaft is fixedly connected to the center of the worm wheel. The rotating shaft is rotatably connected to the housing. The rotating shaft passes through the housing and the distribution tank and extends into the material cavity, and is fixedly connected to a partition. The partition is adapted to the material cavity.

[0016] Furthermore, a pair of symmetrical discharge pipes are fixedly connected to the front end of the diversion tank, and one end of the discharge pipe passes through the diversion tank and communicates with the material chamber.

[0017] In summary, this utility model has the following beneficial effects:

[0018] (1) This solution uses a pusher sleeve to drive the rotating rod, spiral blade, and pusher head to move forward or backward. When the rotating rod, spiral blade, and pusher head move forward, the molten plastic can be pushed out of the melting cylinder into the injection assembly. The two shafts can drive the two connecting rods to rotate, and the connecting rods drive the rotating rod, spiral blade, and pusher head to rotate. During the rotation of the spiral blade, the plastic particles can be stirred, so that the plastic particles can fully contact the inner wall of the melting cylinder, which is convenient for the melting cylinder to heat and melt the plastic particles. At the same time, the molten plastic can be transported to the front end of the melting cylinder. After the molten plastic reaches a certain amount, it is convenient to send the molten plastic into the injection assembly through the pusher sleeve to achieve the requirement of quantitative injection molding.

[0019] (2) By adjusting the partition of the injection assembly, this solution can facilitate the mixing or isolation of the molten plastic. When two colors need to be mixed, the partition is opened horizontally, the inside of the material chamber is connected, and the two different colored plastics delivered by the two melting cylinders are mixed in the material chamber. The plastic injected from the discharge pipe is the mixed color material. When the partition is placed vertically, the inside of the material chamber is isolated, and the two different colored plastics delivered by the two melting cylinders are injected into the two sides of the partition respectively. At this time, the plastic injected from the discharge pipe is the two separate colored plastics. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the overall structure in this embodiment;

[0021] Figure 2 This is a schematic diagram of the overall disassembled structure in this embodiment;

[0022] Figure 3 This is a schematic diagram of the internal structure of the driving component in this embodiment;

[0023] Figure 4 This is a schematic diagram of the split structure of the driver component in this embodiment;

[0024] Figure 5 This is a schematic diagram of the shaft structure in this embodiment;

[0025] Figure 6 This is a schematic diagram of the propulsion sleeve in this embodiment;

[0026] Figure 7 This is a schematic diagram of the internal structure of the injection component in this embodiment;

[0027] Figure 8 This is a schematic diagram of the pusher head in this embodiment.

[0028] In the diagram, 1. Drive assembly; 2. Feeding assembly; 3. Plasticizing assembly; 4. Injection assembly; 101. Outer shell; 102. Inner shell; 103. First motor; 104. Drive shaft; 105. Propulsion sleeve; 106. Spring; 107. Support; 108. Second motor; 109. Transmission gear; 110. Driven gear; 111. Shaft; 201. Support; 202. Hopper; 301. Melting cylinder; 302. Rotating rod; 303. Spiral blade; 304. Connecting rod; 305. Pusher head; 306. Anti-reverse plate; 401. Diverter tank; 402. Machine box; 403. Discharge pipe; 404. Motor; 405. Worm gear; 406. Worm wheel; 407. Rotating shaft; 408. Partition plate; 409. Material chamber. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0031] Reference Figures 1-8As shown, a preferred embodiment of the present invention is a two-color injection molding machine, including a drive assembly 1, a feeding assembly 2 disposed in front of the drive assembly 1, a plasticizing assembly 3 disposed inside the feeding assembly 2, the plasticizing assembly 3 being connected to the drive assembly 1 through the feeding assembly 2, and an injection assembly 4 disposed at the front end of the plasticizing assembly 3. The drive assembly 1 includes a housing 101, an inner housing 102 fixedly connected inside the housing 101, a first motor 103 fixedly connected inside the inner housing 102, a drive shaft 104 fixedly connected to the transmission end of the first motor 103, a push sleeve 105 slidably connected to the middle of the drive shaft 104, a spiral groove opened in the middle of the push sleeve 105, a slide rod slidably connected inside the groove, and the slide rod being fixedly connected to the inner wall of the inner housing 102.

[0032] A bracket 107 is rotatably connected to the front end of the push sleeve 105. The bracket 107 is slidably connected to the inner shell 102. A spring 106 is fixedly connected to the front end of the bracket 107. The end of the spring 106 away from the bracket 107 is fixedly connected to the inner wall of the inner shell 102.

[0033] Through the rotatable connection between the push sleeve 105 and the bracket 107 and the sliding connection between the bracket 107 and the inner shell 102, and with the elastic effect of the spring 106, when the push sleeve 105 moves under the drive of the transmission shaft 104, the spring 106 can play the role of buffering, resetting and assisting in adjusting the position of related components, so as to ensure that the connection and movement between the components are more stable and coordinated, thereby ensuring the normal operation of the entire drive assembly 1 and the two-color injection molding machine.

[0034] A second motor 108 is fixedly connected inside the housing 101. A transmission gear 109 is fixedly connected to the transmission end of the second motor 108. A pair of symmetrical driven gears 110 mesh in the middle of the transmission gear 109. The driven gears 110 are rotatably connected to the housing 101. A shaft 111 is fixedly connected to the front end of the driven gears 110.

[0035] Power is provided by the second motor 108, which drives the transmission gear 109 to rotate. The transmission gear 109 and a pair of driven gears 110 mesh to transmit power to the driven gears 110, thereby causing the shaft 111 fixedly connected to the front end of the driven gear 100 to rotate. The rotation of the shaft 111 can provide power to the components connected to it, thereby driving the relevant components to complete operations such as stirring plastic granules.

[0036] The feeding assembly 2 includes a support 201 installed on the front side of the housing 101, and a pair of symmetrical hoppers 202 are fixedly connected to the top of the support 201.

[0037] The position of the hopper 202 is fixed by installing a support 201 on the front side of the outer casing 101. A pair of symmetrical hoppers 202 can add plastic raw materials of different colors or types through their own holding space, providing material source for subsequent plasticizing and injection molding processes, and ensuring that the two-color injection molding machine can continuously obtain the required raw materials for production operations.

[0038] The plasticizing component 3 includes a pair of symmetrical melting cylinders 301. One end of the melting cylinder 301 passes through the support 201 and abuts against the outer shell 101. The melting cylinder 301 is fixedly connected to the support 201. The top of the melting cylinder 301 is provided with a feed port adapted to the hopper 202. The feed port is connected to the hopper 202.

[0039] Through a pair of symmetrical melting cylinders 301, under the action of an external heating device, and combined with the feed port connected to the hopper 202, the plastic raw material added from the hopper 202 can enter the melting cylinder 301, where the plastic raw material is heated and melted.

[0040] A rotating rod 302 is rotatably connected inside the melting cylinder 301. A spiral blade 303 is fixedly connected to the middle of the rotating rod 302. The middle of the spiral blade 303 is in contact with the inner wall of the melting cylinder 301. A connecting rod 304 is fixedly connected to the rear end of the rotating rod 302. The connecting rod 304 passes through the melting cylinder 301, the outer shell 101, and the bracket 107 and extends into the interior of the shaft 111. The connecting rod 304 is slidably connected to the shaft 111. A pusher head 305 is fixedly connected to the front end of the rotating rod 302. Through holes are opened at both ends of the pusher head 305. A backstop plate 306 is hinged inside the through holes. The shape of the pusher head 305 is conical.

[0041] The rotation of shaft 111 drives the connecting rod 304, which is slidably connected to it, to rotate, thereby causing the rotating rod 302 to rotate. The spiral blade 303, which is fixedly connected to the rotating rod 302, fits tightly against the inner wall of the melting cylinder 301 during rotation. The rotation of the spiral blade 303 stirs and pushes the plastic raw material in the melting cylinder 301, so that the raw material can be fully heated and uniformly mixed, accelerating the plasticizing process. At the same time, the pusher head 305 at the front end of the rotating rod 302 and the anti-reverse plate 306 on it can push the plasticized raw material to the front end of the melting cylinder 301 when the rotating rod 302 rotates and advances. The pusher head 305 can push the plasticized raw material to the front end of the melting cylinder 301, while the anti-reverse plate 306 can prevent the raw material from flowing back, ensuring that the raw material can be smoothly delivered to the injection unit. When the spiral blade 303 delivers plastic, the molten plastic can be delivered to the front end of the melting cylinder 301 through the through hole.

[0042] The injection assembly 4 includes a distribution tank 401 fixedly installed at the front end of the melting cylinder 301. The distribution tank 401 has a material cavity 409 inside. The front end of the distribution tank 401 is fixedly connected to a housing 402. A motor 404 is fixedly connected inside the housing 402. A worm gear 405 is fixedly connected to the transmission end of the motor 404. A worm wheel 406 meshes with the middle of the worm gear 405. A rotating shaft 407 is fixedly connected to the center of the worm wheel 406. The rotating shaft 407 is rotatably connected to the housing 402. The rotating shaft 407 passes through the housing 402 and the distribution tank 401 and extends into the material cavity 409. A partition 408 is fixedly connected to the rotating shaft 407. The partition 408 is adapted to the material cavity 409.

[0043] Power is provided by motor 404, which drives worm gear 405 to rotate. Utilizing the meshing transmission relationship between worm gear 405 and worm wheel 406, worm wheel 406 rotates, which in turn drives shaft 407 to rotate. The rotation of shaft 407 can adjust the position of partition 408, which is fixedly connected to it, within material cavity 409. When partition 408 is in different positions, it can achieve mixing or isolation of plasticized raw materials entering material cavity 409 of distributor tank 401. For example, when partition 408 is opened horizontally, it can achieve mixing of two different colored raw materials, and when partition 408 is placed vertically, it can achieve isolation of two raw materials, thereby meeting the needs of two-color injection molding machine for two-color injection molding or different injection molding modes.

[0044] A pair of symmetrical discharge pipes 403 are fixedly connected to the front end of the diversion tank 401. One end of the discharge pipe 403 passes through the diversion tank 401 and communicates with the material chamber 409.

[0045] By fixing a pair of symmetrical discharge pipes 403 to the front end of the distribution tank 401 and connecting one end of them to the material cavity 409, after the plasticized raw material in the material cavity 409 is mixed or isolated by the adjustment treatment of the partition plate 408, it can be smoothly injected into the mold through the discharge pipes 403 to complete the two-color injection molding. This makes it easy to inject the plasticized raw material into the mold according to the required two-color injection molding or different injection molding modes to form two-color or different colored plastic products.

[0046] Specific implementation process: First, plastic raw materials of different colors or types are poured into the two hoppers 202 of the feeding component 2 respectively. Then, the second motor 108 in the drive component 1 is started. The second motor 108 drives the transmission gear 109 to rotate. The transmission gear 109 drives a pair of driven gears 110 that mesh with it to rotate, thereby causing the shaft 111 at the front end of the driven gear 110 to rotate. The rotation of shaft 111 drives the rotating rod 302 inside the melting cylinder 301 to rotate via the connecting rod 304 slidably connected to it. The spiral blade 303 on the rotating rod 302 stirs and pushes the plastic raw material in the melting cylinder 301, making it fully contact the inner wall of the melting cylinder 301 and melt it. At the same time, the pusher head 305 at the front end of the rotating rod 302 pushes the plasticized raw material towards the front end of the melting cylinder 301 when the rotating rod 302 rotates and the subsequent pusher sleeve 105 pushes it. The anti-reverse plate 306 prevents the raw material from flowing back. Then, when the plastic in the melting cylinder 301 reaches a certain degree of plasticization and the amount is sufficient, the first motor 103 is started. The first motor 103 drives the pusher sleeve 105 to move through the transmission shaft 104. Under the action of the slide rod and its own spiral groove, the pusher sleeve 105 pushes the rotating rod 302, spiral blade 303 and pusher head 305 forward as a whole, pushing the melted plastic out of the melting cylinder 301 and into the injection assembly 4. Inside the flow tank 401, the motor 404 in the injection assembly 4 is activated according to the required injection mode. The motor 404 drives the worm gear 405 to rotate, and the worm gear 405 meshes with the worm wheel 406 to rotate, which in turn drives the rotating shaft 407 to rotate. The position of the partition plate 408 in the material cavity 409 is adjusted. If two colors are to be mixed, the partition plate 408 is opened horizontally. The different colored plastics conveyed by the two melting cylinders 301 are mixed in the material cavity 409 and then injected into the mold through the discharge pipe 403. If two colors are to be separated, the partition plate 408 is placed vertically. The two different colored plastics are injected into the two sides of the partition plate 408 respectively, and then injected into the mold through the discharge pipe 403 to complete the two-color injection molding process. Throughout the process, the sliding connection between the support 107 at the front end of the push sleeve 105 and the inner shell 102, as well as the spring 106, play the roles of buffering, resetting, and assisting in adjusting the position of related components, ensuring that the movement of each component is smooth and coordinated, and ensuring the continuous and stable operation of the two-color injection molding machine.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A two-color injection molding machine, characterized in that: It includes a drive assembly (1), a feeding assembly (2) is provided in front of the drive assembly (1), a plasticizing assembly (3) is provided inside the feeding assembly (2), the plasticizing assembly (3) is connected to the drive assembly (1) through the feeding assembly (2), and an injection assembly (4) is provided at the front end of the plasticizing assembly (3). The drive assembly (1) includes a housing (101), an inner housing (102) is fixedly connected inside the housing (101), a first motor (103) is fixedly connected inside the inner housing (102), a drive shaft (104) is fixedly connected to the drive end of the first motor (103), a push sleeve (105) is slidably connected to the middle of the drive shaft (104), a spiral groove is provided in the middle of the push sleeve (105), a slide rod is slidably connected inside the groove, and the slide rod is fixedly connected to the inner wall of the inner housing (102).

2. A two-color injection molding machine according to claim 1, characterized in that: The front end of the propulsion sleeve (105) is rotatably connected to a bracket (107), the bracket (107) is slidably connected to the inner shell (102), and the front end of the bracket (107) is fixedly connected to a spring (106), the end of the spring (106) away from the bracket (107) is fixedly connected to the inner wall of the inner shell (102).

3. A two-color injection molding machine according to claim 1, characterized in that: A second motor (108) is fixedly connected inside the outer casing (101). A transmission gear (109) is fixedly connected to the transmission end of the second motor (108). A pair of symmetrical driven gears (110) mesh in the middle of the transmission gear (109). The driven gears (110) are rotatably connected to the outer casing (101). A shaft (111) is fixedly connected to the front end of the driven gears (110).

4. A two-color injection molding machine according to claim 1, characterized in that: The feeding assembly (2) includes a support (201) installed on the front side of the housing (101), and a pair of symmetrical hoppers (202) are fixedly connected to the top of the support (201).

5. A two-color injection molding machine according to claim 1, characterized in that: The plasticizing component (3) includes a pair of symmetrical melting cylinders (301). One end of the melting cylinder (301) passes through the support (201) and abuts against the outer shell (101). The melting cylinder (301) is fixedly connected to the support (201). The top of the melting cylinder (301) is provided with a feed port adapted to the hopper (202). The feed port is connected to the hopper (202).

6. A two-color injection molding machine according to claim 5, characterized in that: The inside of the melting cylinder (301) is rotatably connected to a rotating rod (302). A spiral blade (303) is fixedly connected to the middle of the rotating rod (302). The middle of the spiral blade (303) is in contact with the inner wall of the melting cylinder (301). A connecting rod (304) is fixedly connected to the rear end of the rotating rod (302). The connecting rod (304) extends through the melting cylinder (301), the outer shell (101), and the bracket (107) to the inside of the shaft (111). The connecting rod (304) is slidably connected to the shaft (111). A pusher head (305) is fixedly connected to the front end of the rotating rod (302). Through holes are opened at both ends of the pusher head (305). A backstop plate (306) is hinged inside the through hole. The shape of the pusher head (305) is conical.

7. A two-color injection molding machine according to claim 1, characterized in that: The injection assembly (4) includes a diversion tank (401) fixedly installed at the front end of the melting cylinder (301). The diversion tank (401) has a material cavity (409) inside. The front end of the diversion tank (401) is fixedly connected to a housing (402). A motor (404) is fixedly connected inside the housing (402). A worm gear (405) is fixedly connected to the transmission end of the motor (404). A worm wheel (406) meshes with the middle of the worm gear (405). A rotating shaft (407) is fixedly connected to the center of the worm wheel (406). The rotating shaft (407) is rotatably connected to the housing (402). The rotating shaft (407) passes through the housing (402) and the diversion tank (401) and extends into the material cavity (409) and is fixedly connected to a partition (408). The partition (408) is adapted to the material cavity (409).

8. A two-color injection molding machine according to claim 7, characterized in that: The front end of the diversion tank (401) is fixedly connected to a pair of symmetrical discharge pipes (403), one end of which passes through the diversion tank (401) and communicates with the material chamber (409).

Images