Rotating mechanism of double-color injection mold

Abstract

The utility model discloses a rotating mechanism of a double-color injection mold. The rotating mechanism comprises an oil cylinder, an oil cylinder connecting block, a rack, a gear, a shaft sleeve, a rotating shaft, a bearing, a limiting disc, an angle limiting block and a fixing plate, the oil cylinder is connected with the outer end of the rack, the inner end of the rack is meshed with the gear, the gear and the limiting disc are both fixedly connected to the shaft sleeve in a sleeved mode, the limiting disc abuts against the angle limiting block to play a role in limiting the rotating angle of the gear, and the shaft sleeve is movably connected to the rotating shaft in a sleeved mode and rotatably arranged in the movable mold plate in a sleeved mode through a bearing. After the first cavity is subjected to injection molding, the mold is opened, after the push plate is ejected, the oil cylinder is ejected to drive the gear to rotate through the rack, so that the rotating shaft rotates, then the push plate mounted at the top end of the rotating shaft is driven to rotate by 180 degrees, and in the rotating process of the rotating shaft, the limiting disc is matched with the angle limiting block to play a role in accurately limiting the rotating angle of the rotating shaft; and the first-injection product is taken to the second-injection cavity by the push plate and then the mold is closed, and the second-injection product is subjected to injection molding, so that the in-mold rotary double-color injection molding one-time mold stripping is realized.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a rotary mechanism of a two-color injection mold. Background Art

[0002] A two-color mold is a type of mold that can meet the injection molding of products with two or more molding materials. The molding process of this mold is as follows: as Figure 1 shown, after the first injection is completed, the first injection product 101 remains on the moving mold side, and then the machine table turntable rotates, and the moving mold rotates 180° to the second injection molding station to form the second injection product 102 and the required finished product 100. Most traditional two-color injection molds use an injection molding machine with a rotating machine table for injection molding, and their processing process has high requirements for equipment. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a rotary mechanism of a two-color injection mold with accurate positioning and in-mold rotation.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] The utility model is a rotary mechanism of a two-color injection mold, including an oil cylinder, an oil cylinder connecting block, a rack, a gear, a bushing, a rotating shaft, a bearing, a limit disc, an angle limit block, and a fixing plate;

[0006] The rod end of the piston rod of the oil cylinder is connected to the outer end of the rack through the oil cylinder connecting block. The inner end of the rack extends into the moving template and meshes with the gear installed in the moving template. Both the gear and the limit disc are fixedly sleeved on the bushing. The outer edge of the limit disc abuts against the angle limit block, playing a role in limiting the rotation angle of the gear. The inner hole of the bushing is movably sleeved on the rotating shaft in an axially movable manner, and the outer wall of the bushing is rotatably sleeved in the moving template through a bearing. The fixing plate is fixedly sleeved on the lower end of the rotating shaft, and an installation block is provided at the upper end of the rotating shaft.

[0007] The outer edge of the limit disc is circular and has a convex block, and both sides of the convex block can abut against two angle limit blocks.

[0008] The utility model further includes two rack limit blocks; both of the two rack limit blocks are installed on the moving template and are located in front of and behind the moving track of the rack, and the two rack limit blocks can abut against the front end and the rear part of the rack.

[0009] The utility model further includes a push plate; the top surface of the push plate is provided with a primary injection cavity and a secondary injection cavity, and the middle part of the bottom surface of the push plate is fixedly connected to the installation block at the upper end of the rotating shaft.

[0010] After adopting the above solution, since the present utility model includes an oil cylinder, an oil cylinder connecting block, a rack, a gear, a bushing, a rotating shaft, a bearing, a limit disc, an angle limit block, and a fixing plate, after the first cavity is injection-molded and the mold is opened, the moving template and the fixed template are separated. After the ejector plate is ejected, the oil cylinder drives the gear to rotate through the rack, causing the rotating shaft to rotate, and then driving the ejector plate installed at the top of the rotating shaft to rotate 180°. During the rotation of the rotating shaft, the convex block on the limit disc can abut against the angle limit block, playing a role in accurately limiting the rotation angle of the rotating shaft; the first-shot product is brought to the second-shot cavity by the ejector plate and then the mold is closed for injection. After the second-shot product is injection-molded, the mold is opened, the ejector plate is ejected, and the manipulator takes out the product and the runner. The oil cylinder retracts to drive the ejector plate back to its original position, thus achieving a one-time ejection for in-mold rotary two-color injection molding without the need to use large and complex equipment.

[0011] The following further describes the present utility model with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0012] Figure 1 is an axonometric view of the product;

[0013] Figure 2 is an axonometric view of the present utility model;

[0014] Figure 3 is an axonometric view of the present utility model with the ejector plate removed;

[0015] Figure 4 is a bottom view of the present utility model;

[0016] Figure 5 is an axonometric view of the limit disc of the present utility model. Detailed Embodiment

[0017] As Figures 2 - 4 shown, the present utility model is a rotary mechanism for a two-color injection mold, including an oil cylinder 1, an oil cylinder connecting block 2, a rack 3, a gear 4, a bushing 5, a rotating shaft 6, a bearing 7, a limit disc 8, an angle limit block 9, a fixing plate 10, an ejector plate 20, and two rack limit blocks 30.

[0018] The rod end of the piston rod of the oil cylinder 1 is connected to the outer end of the rack 3 through an oil cylinder connecting block 2. The inner end of the rack 3 extends into the moving template (not shown in the figure) and meshes with a gear 4 installed inside the moving template. Guide blocks 50 and wear-resistant blocks 60 are respectively provided on the top and bottom surfaces of the rack 3. Both the gear 4 and the limit disc 8 are fixedly sleeved on the bushing 5. The outer edge of the limit disc 8 abuts against the angle limit block 9, serving to limit the rotation angle of the gear 4. The inner hole of the bushing 5 is movably sleeved on the rotating shaft 5 in a keyway fit manner, and the outer wall of the bushing 5 is rotatably sleeved inside the moving template through a bearing 7. The fixed plate 10 is fixedly sleeved on the lower end of the rotating shaft 6. An installation block 61 is provided at the upper end of the rotating shaft 6. The fixed plate 10 is installed on the moving die insert 40, and the moving die insert 40 is installed inside the moving template. The two rack limit blocks 30 are both installed on the moving template and are located in front of and behind the moving track of the rack 3. The two rack limit blocks 30 can abut against the front and rear parts of the rack.

[0019] In this embodiment, the inner hole of the bushing 5 is movably sleeved on the rotating shaft 5 in a keyway fit manner.

[0020] Combined with Figure 5 As shown, the outer edge of the limit disc 8 is circular and has a convex block 81 protruding outward. The two sides of the convex block 81 can abut against the two angle limit blocks 9.

[0021] The top surface of the push plate 20 is provided with a primary injection cavity 201 and a secondary injection cavity 202. The middle part of the bottom surface of the push plate 20 is fixedly connected to the installation block 61 at the upper end of the rotating shaft 6.

[0022] The working principle of the present utility model:

[0023] Combined with Figure 1 As shown, after the first cavity is injection-molded and the mold is opened, the moving template and the fixed template are separated. After the push plate 20 is ejected, the oil cylinder 1 is ejected to drive the gear 4 to rotate through the rack 3, causing the rotating shaft 6 to rotate, and then driving the push plate 20 installed at the top end of the rotating shaft 6 to rotate 180°. During the rotation of the rotating shaft 6, the convex block 81 on the limit disc 8 can abut against the angle limit block 9, serving to accurately limit the rotation angle of the rotating shaft 6. The first-shot product 101 is brought to the second-shot cavity by the push plate and then the mold is closed for injection. After the second-shot product 102 is injection-molded in the second shot and the mold is opened, the push plate 20 is ejected, and the manipulator takes out the product and the runner. The oil cylinder 1 retracts to drive the push plate 20 back to its original position, thereby achieving a one-shot mold release for in-mold rotary two-color injection molding.

[0024] The above is only a preferred embodiment of the present utility model, and thus cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A two-color injection mold rotating mechanism, characterized in that: It includes a cylinder, a cylinder connecting block, a rack, a gear, a sleeve, a rotating shaft, a bearing, a limit plate, an angle limit block, and a fixing plate; The rod end of the piston rod of the cylinder is connected to the outer end of the rack through the cylinder connecting block, the inner end of the rack extends into the movable template and meshes with the gear installed in the movable template, the gear and the limit plate are fixedly sleeved on the shaft sleeve, the outer edge of the limit plate abuts against the angle limit block, which plays a role in limiting the rotation angle of the gear, the inner hole of the shaft sleeve is movably sleeved on the rotating shaft in an axially movable manner, and the outer wall of the shaft sleeve is rotatably sleeved in the movable template through a bearing, the fixed plate is fixedly sleeved on the lower end of the rotating shaft, and a mounting block is provided at the upper end of the rotating shaft.

2. The two-color injection mold rotating mechanism according to claim 1, characterized in that: The outer edge of the limiting plate is circular and has a convex block, and two sides of the convex block can be pressed against two angle limiting blocks.

3. The two-color injection mold rotating mechanism according to claim 1, characterized in that: It also includes two rack limit blocks; the two rack limit blocks are both installed on the movable template and are located in front of and behind the rack movement track, and the two rack limit blocks can be abutted against the front end and rear end of the rack.

4. The two-color injection mold rotating mechanism according to claim 1, characterized in that: It also includes a push plate; the top surface of the push plate is provided with a primary injection cavity and a secondary injection cavity, and the middle part of the bottom surface of the push plate is fixedly connected to the mounting block at the upper end of the rotating shaft.

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