Plastic cover injection molding device

Abstract

The utility model provides an injection molding device for a plastic cover, which belongs to the technical field of injection molding and comprises a base, and the top of the base is provided with two arc-shaped clamping blocks and an adjusting mechanism in a limited sliding manner; a moving block is arranged in the arc-shaped opening of each arc-shaped clamping block in a limiting and sliding mode, a second elastic piece is arranged between each moving block and the corresponding arc-shaped clamping block, and rubber layers are arranged on the opposite sides of the two moving blocks; the top of the sliding plate is used for placing a lower die, and a first elastic piece is arranged between the bottom of the sliding plate and the base; a supporting frame is fixedly arranged on the outer surface of the base and connected with the upper die plate through a lifting mechanism. In the process that the lifting mechanism drives the upper die plate to descend, the clamped lower die can slide in the vertical direction, so that instant impact generated by die assembly is converted into elastic potential energy through elastic buffering of the first elastic piece and the second elastic piece, and then rigid collision between dies is effectively avoided; therefore, the damage of die assembly impact to the die is relieved fundamentally.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology, and specifically relates to a plastic cap injection molding device. Background Technology

[0002] In the field of injection molding production of plastic caps, injection molding equipment is a key piece of equipment for achieving efficient and high-quality production. Injection molding is a crucial process in modern plastics processing. Its principle is to inject molten plastic material at high speed into and fill the mold cavity, and after cooling and solidification, obtain the product of the desired shape. In the entire process system, the stable clamping of the mold is the core foundation for ensuring product quality and improving production efficiency.

[0003] However, existing injection molding devices typically focus on quickly and securely clamping and positioning the lower mold, neglecting the direct rigid collision or impact that often occurs between the upper mold platen and the lower mold during the final pressing under hydraulic or pneumatic drive. This hard contact, during long-term, high-frequency production operations, can easily lead to microscopic damage to the contact surfaces of the upper and lower mold plates, even resulting in chipping or deformation, ultimately severely impacting mold lifespan and increasing production costs. Therefore, there is an urgent need for an injection molding device that can both stably clamp the lower mold and effectively buffer impacts during mold closing.

[0004] A patent with publication number CN215825789U discloses an injection molding machine for easy positioning of injection molds. It includes an upper mold, a lower mold, a carrier box, a motor, a threaded rod, a sliding plate, a threaded sleeve, a connecting plate, an arc-shaped clamping plate, a rubber sleeve, and a cylinder. In use, the lower mold is placed in the positioning groove at the top of the carrier box. The motor's output shaft drives the threaded rod to rotate, causing the sliding plate and threaded sleeve to slide. This drives the two connecting plates and their arc-shaped clamping plates to move closer together, clamping and fixing the lower mold. The rubber sleeve provides protection and prevents slippage. Subsequently, the cylinder drives the upper mold to descend and seal the top of the lower mold.

[0005] Although the above solution can protect the side wall of the lower mold with a rubber sleeve, during the mold closing process, the upper mold and the lower mold, which are directly driven by the cylinder, still have a rigid impact contact. This hard collision is prone to microscopic damage or fatigue failure on the contact surface of the mold in long-term operation, which will significantly reduce the service life of the upper and lower molds, increase maintenance costs, and make it inconvenient for practical promotion and use. Utility Model Content

[0006] To address the problems existing in the background art, this utility model provides a plastic cap injection molding device.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The utility model provides a kind of plastic cover injection molding device, including base, the top of the base is limit position slidingly arranged two arc clamping blocks, and is provided with adjusting mechanism for driving two arc clamping blocks to slide towards each other or away from each other;The arc-shaped opening of each arc clamping block is limit position slidingly arranged moving block along vertical direction, and second elastic member is arranged between moving block and arc clamping block, and the opposite side of two moving blocks is provided with rubber layer;The top of the base is limit position slidingly arranged sliding plate, and the top of sliding plate is used to place lower mould, and first elastic member is arranged between the bottom of sliding plate and base;The outer surface of the base is fixedly arranged support frame, and support frame is connected upper mould plate by lifting mechanism, and upper mould plate is drivingly cooperated with lower mould.

[0009] Further, the adjusting mechanism includes a bidirectional screw, the top of the base is rotatably arranged along the horizontal direction and limit position slidingly arranged along the horizontal direction two moving plates, the two moving plates are fixedly connected with the two arc clamping blocks one by one and threadedly cooperated with the two threaded segments of the bidirectional screw one by one;The top of the base is fixedly arranged along the horizontal direction guide rod, and the two moving plates are slidingly sleeved on the outer surface of the guide rod;The outer surface of the base is fixedly installed motor, and the output shaft of the motor is coaxially fixedly connected with one end of the bidirectional screw.

[0010] Further, the second elastic member includes a second spring, a slide is formed in the arc clamping block along the vertical direction, and the moving block is limit position slidingly arranged in the slide;The slide is provided with a second spring, one end of the second spring is fixedly connected with the moving block, and the other end is fixedly connected with the inner wall of the bottom of the slide.

[0011] Further, the first elastic member includes a first spring, a groove is formed in the top of the base, and the sliding plate is limit position slidingly arranged in the groove;The first spring is installed between the sliding plate and the groove, the top of the first spring is fixedly connected with the bottom of the sliding plate, and the bottom of the first spring is fixedly connected with the inner wall of the bottom of the groove.

[0012] Further, the top of the base is provided with a sliding groove communicated with the groove, and the sliding plate and the sliding groove are limit position slidingly cooperated.

[0013] Further, the outer surface of the lower mould is fixedly arranged with a limit block, and the limit block and the sliding groove are limit position slidingly cooperated one by one.

[0014] Further, the lifting mechanism includes a hydraulic rod, the top of the support frame is fixedly installed with a hydraulic rod, and the telescopic shaft of the hydraulic rod is slidingly penetrated through the top of the support frame and fixedly connected with the upper mould plate.

[0015] Further, the upper mould plate is fixedly arranged with a communication pipe, and the communication pipe is used to communicate with external material conveying device.

[0016] The application has the following beneficial effects:

[0017] After the lower mold is placed on the sliding plate, the adjusting mechanism can drive the two arc-shaped clamping blocks and the moving blocks thereon to approach each other, so as to effectively clamp and limit the lower mold by means of the rubber layer while providing flexible protection. Moreover, in the process of the lifting mechanism driving the upper mold plate to descend, the clamped lower mold can slide in the vertical direction, so as to convert the instantaneous impact generated by the mold closing into elastic potential energy through the elastic buffering of the first elastic member and the second elastic member, thereby effectively avoiding the rigid collision between the molds, fundamentally relieving the damage of the mold closing impact to the molds, significantly prolonging the service life of the upper mold plate and the lower mold, and having better practical effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein the same reference characters refer to the same elements or parts throughout several of the drawings and in which:

[0019] Figure 1 is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 is a schematic diagram of the structure of the second elastic member of the present application;

[0021] Figure 3 is a schematic diagram of the structure of the lower mold and the limiting block of the present application;

[0022] Figure 4 is a schematic diagram of the structure of the first elastic member of the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, base; 2, groove; 3, sliding groove; 4, sliding plate; 5, first spring; 6, bidirectional screw; 7, motor; 8, moving plate; 9, arc-shaped clamping block; 10, slide; 11, moving block; 12, rubber layer; 13, second spring; 14, support frame; 15, hydraulic rod; 16, upper mold plate; 17, communication pipe; 18, lower mold; 19, limiting block. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and those skilled in the art should know that the embodiments described below are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] As Figures 1-4The utility model discloses the technical scheme as follows is shown: a kind of plastic cover injection molding device, including base 1, the top of base 1 is limit position slidingly arranged two arc clamping blocks 9, and is provided with adjusting mechanism that drives two arc clamping blocks 9 slide towards or away from each other.

[0027] Specifically, the adjusting mechanism includes a bidirectional screw rod 6, the top of the base 1 is rotatably arranged along the horizontal direction, and two moving plates 8 are limit position slidingly arranged along the horizontal direction, the two moving plates 8 are fixedly connected with the two arc clamping blocks 9 one by one, and are threadedly engaged with two threaded segments of the bidirectional screw rod 6 one by one.

[0028] The top of the base 1 is fixedly arranged along the horizontal direction with a guide rod (not labeled in the figure), and the two moving plates 8 are slidingly sleeved on the outer surface of the guide rod; the outer surface of the base 1 is fixedly installed with a motor 7, and the output shaft of the motor 7 is coaxially fixedly connected with one end of the bidirectional screw rod 6.

[0029] Each arc clamping block 9 is limit position slidingly arranged with a moving block 11 along the vertical direction in the arc-shaped opening, and a second elastic member is arranged between the moving block 11 and the arc clamping block 9, and the opposite sides of the two moving blocks 11 are provided with rubber layers 12.

[0030] Specifically, the second elastic member includes a second spring 13, a slide 10 is formed in the arc clamping block 9 along the vertical direction, and the moving block 11 is limit position slidingly arranged in the slide 10; the slide 10 is provided with the second spring 13, one end of the second spring 13 is fixedly connected with the moving block 11, and the other end is fixedly connected with the bottom inner wall of the slide 10.

[0031] The top of the base 1 is limit position slidingly arranged with a sliding plate 4, the top of the sliding plate 4 is placed with a lower mold 18, and a first elastic member is arranged between the bottom of the sliding plate 4 and the base 1; the outer surface of the base 1 is fixedly arranged with a support frame 14, the support frame 14 is connected with an upper mold plate 16 through a lifting mechanism, and the upper mold plate 16 is drivingly matched with the lower mold 18.

[0032] Specifically, the first elastic member includes a first spring 5, a recess 2 is formed in the top of the base 1, and the sliding plate 4 is limit position slidingly arranged in the recess 2; the first spring 5 is installed between the sliding plate 4 and the recess 2, the top of the first spring 5 is fixedly connected with the bottom of the sliding plate 4, and the bottom of the first spring 5 is fixedly connected with the bottom inner wall of the recess 2.

[0033] Further specifically, the top of the base 1 is formed with a sliding groove 3 communicating with the recess 2, and the sliding plate 4 is limit position slidingly matched with the sliding groove 3.

[0034] Further specifically, the outer surface of the lower mold 18 is fixedly arranged with a limit block 19, and the limit block 19 is limit position slidingly matched with the sliding groove 3.

[0035] Specifically, the lifting mechanism comprises a hydraulic rod 15, the hydraulic rod 15 is fixedly installed at the top of the support frame 14, and the telescopic shaft of the hydraulic rod 15 is slidably penetrated through the top of the support frame 14 and is fixedly connected with the upper mold plate 16.

[0036] Further specifically, a communication pipe 17 is fixedly arranged on the upper mold plate 16, the communication pipe 17 is communicated with an external material conveying device, and the molten plastic is filled in the lower mold 18.

[0037] In addition, it should be noted that the lower mold 18 is internally provided with a cooling assembly and an ejection assembly, the external material conveying device, the cooling assembly and the ejection assembly all belong to the conventional prior art, and the present application does not make a detailed description.

[0038] Working principle: when in use, the lower mold 18 is placed on the top of the sliding plate 4, and the limiting block 19 at the lower part of the lower mold 18 is aligned with the sliding groove 3 on the base 1, so as to realize preliminary positioning.

[0039] Subsequently, the motor 7 is started, the output shaft of the motor 7 drives the bidirectional screw rod 6 to rotate, the bidirectional screw rod 6 drives the two moving plates 8 and the arc-shaped clamping blocks 9 fixedly connected therewith to move towards each other until the rubber layer 12 on the inner side of the arc-shaped clamping blocks 9 contacts and abuts against the outer wall of the lower mold 18. During this period, the rubber layer 12 is deformed, which can not only avoid damaging the outer wall of the lower mold 18, but also can improve the friction between the rubber layer 12 and the lower mold 18, so as to ensure the clamping effect.

[0040] Then, the hydraulic rod 15 is started, the telescopic shaft of the hydraulic rod 15 drives the upper mold plate 16 to descend, when the upper mold plate 16 contacts the lower mold 18, with the continuous descending of the upper mold plate 16, the lower mold 18 pushes the sliding plate 4 to slide downwards and compresses the first spring 5. At the same time, the moving block 11 is driven to slide in the slide 10 and compress the second spring 13 through the friction between the rubber layer 12 and the lower mold 18, so as to effectively convert the rigid impact of mold closing into the elastic potential energy of the first spring 5 and the second spring 13, and active buffering is realized.

[0041] When the sliding plate 4 reaches the bottom of the sliding groove 3, the lower mold 18 cannot continue to move, and the upper mold plate 16 and the lower mold 18 are precisely closed at this time. Then, the molten plastic is injected into the sealed mold cavity through the communication pipe 17, and the injection molding is completed.

[0042] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plastic cap injection molding apparatus characterized by, Including base (1), the top of base (1) is limit position slidingly provided with two arc clamping blocks (9), and is provided with adjusting mechanism for driving two arc clamping blocks (9) to slide towards or away from each other, The arc-shaped opening of each arc clamping block (9) is limit position slidingly provided with moving block (11) along the vertical direction, and the second elastic member is arranged between the moving block (11) and the arc clamping block (9), and the opposite sides of the two moving blocks (11) are provided with rubber layers (12); The top of base (1) is limit position slidingly provided with sliding plate (4), the top of sliding plate (4) is used for placing lower mold (18), and the first elastic member is arranged between the bottom of sliding plate (4) and base (1); The outer surface of base (1) is fixedly provided with support frame (14), support frame (14) is connected with upper mold plate (16) through lifting mechanism, and upper mold plate (16) is drivingly matched with lower mold (18).

2. The plastic cap injection molding device of claim 1, wherein, The adjusting mechanism comprises a bidirectional screw rod (6), the top of the base (1) is rotatably provided with the bidirectional screw rod (6) along the horizontal direction, and two moving plates (8) are limit position slidingly arranged along the horizontal direction, the two moving plates (8) are fixedly connected with the two arc clamping blocks (9) one by one and are screwedly matched with the two threaded segments of the bidirectional screw rod (6) one by one, The top of the base (1) is fixedly provided with a guide rod along the horizontal direction, and the two moving plates (8) are slidingly sleeved on the outer surface of the guide rod; the outer surface of the base (1) is fixedly installed with a motor (7), and the output shaft of the motor (7) is fixedly connected with one end of the bidirectional screw rod (6) in a same axis.

3. The plastic cap injection molding device of claim 1, wherein, The second elastic member comprises a second spring (13), a slide (10) is formed in the arc clamping block (9) along the vertical direction, and the moving block (11) is limit position slidingly arranged in the slide (10); the slide (10) is provided with the second spring (13), one end of the second spring (13) is fixedly connected with the moving block (11), and the other end is fixedly connected with the inner wall of the bottom of the slide (10).

4. The plastic cap injection molding apparatus of claim 1, wherein, The first elastic member comprises a first spring (5), the top of the base (1) is provided with a groove (2), and the sliding plate (4) is limit position slidingly arranged in the groove (2); the first spring (5) is installed between the sliding plate (4) and the groove (2), the top of the first spring (5) is fixedly connected with the bottom of the sliding plate (4), and the bottom of the first spring (5) is fixedly connected with the inner wall of the bottom of the groove (2).

5. The plastic cap injection molding apparatus of claim 4, wherein, The top of the base (1) is provided with a sliding groove (3) communicated with the groove (2), and the sliding plate (4) is limit position slidingly matched with the sliding groove (3).

6. The plastic cap injection molding apparatus of claim 5, wherein, The outer surface of the lower mold (18) is fixedly provided with a limit block (19), and the limit block (19) is limit position slidingly matched with the sliding groove (3) one by one.

7. The plastic cap injection molding apparatus of claim 1, wherein, The lifting mechanism comprises a hydraulic rod (15), the top of the support frame (14) is fixedly installed with the hydraulic rod (15), and the telescopic shaft of the hydraulic rod (15) slidingly penetrates the top of the support frame (14) and is fixedly connected with the upper mold plate (16).

8. The plastic cap injection molding apparatus of claim 7, wherein, The upper mold plate (16) is fixedly provided with a communication pipe (17), and the communication pipe (17) is used for communicating with an external material conveying device. The outer surface of the lower mold (18) is fixedly provided with a limit block (19), and the limit block (19) is limit position slidingly matched with the sliding groove (3) one by one.

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