Full-automatic injection molding device for middle case shell of PVC (polyvinyl chloride) case

Abstract

The invention discloses a full-automatic injection molding device for a middle case shell of a PVC luggage, and relates to the technical field of full-automatic injection molding of the middle case shell of the PVC luggage. The full-automatic injection molding device for the middle case shell of the PVC luggage comprises a base, the top of the base is fixedly connected with an injection molding part, the top of the base is fixedly connected with a forming part on the left side of the injection molding part, and the left side of the base is fixedly connected with a cooling mechanism. According to the full-automatic injection molding device for the middle case shell of the PVC case, when traditional injection molding equipment continuously works, injection molding and forming parts can generate a large amount of heat, the temperature of the whole equipment is easily increased, and the precision and the service life are affected. The base is creatively designed to be of a structure with a cavity inside, and cooling water can be injected into the base. Therefore, the base surpasses the traditional single supporting function. The cooling water circulating in the cavity can directly and continuously absorb conduction heat generated by the injection molding part and the forming part at the upper part.

Description

Technical Field

[0001] This invention relates to the field of fully automatic injection molding technology for PVC luggage inner shells, specifically to a fully automatic injection molding device for PVC luggage inner shells. Background Technology

[0002] Fully automated injection molding of PVC luggage shells is a highly efficient and precise production process. Its core equipment mainly consists of a drive housing, sliding rods, limit blocks, pneumatic cylinders, a moving mold, an extrusion plate, a fixed mold, and conveying pipes. During operation, the PVC raw material is first mixed with various additives and pre-dried to ensure its quality. Next, the raw material is melted and plasticized to ensure good fluidity and prevent degradation. Then, under injection pressure, the molten material is rapidly injected into the mold cavity. After injection, a certain pressure is maintained inside the mold to compensate for the material's cooling shrinkage and ensure product dimensional stability. During the cooling stage, an optimized cooling channel ensures uniform cooling of the mold and prevents product deformation. Once cooling is complete, the pneumatic cylinder pulls the moving mold apart from the fixed mold, and the limit blocks cause the extrusion plate to push the molded product off the moving mold, completing demolding.

[0003] Patent application CN112172010A discloses a fully automatic injection molding device for PVC luggage inner shells, belonging to the field of luggage processing technology. This fully automatic injection molding device for PVC luggage inner shells includes a main body. A drive shell is provided on one side of the top of the main body, and a set of sliding rods is welded to one side of the drive shell. A set of limiting blocks is provided on the outer side of the drive shell at the top of the sliding rods. A pneumatic cylinder with its output end connected to a moving mold is installed inside the drive shell. A moving mold is sleeved on the outer side of the sliding rods, and an extrusion plate is connected to one side of the moving mold. This invention uses a pneumatic cylinder to pull the moving mold apart from a fixed mold. One end of the limiting block contacts and limits the extrusion plate, causing the extrusion plate to separate from the moving mold. The extrusion plate pushes the injection-molded product to fall from the outside of the moving mold. Reactivating the pneumatic cylinder pushes the moving mold and fixed mold to close, while a torsion spring pulls the extrusion plate to reset, facilitating the removal of the injection-molded product adhering to the outside of the moving mold.

[0004] The aforementioned patented extrusion plate pushes the injection-molded product off the outside of the moving mold. The pneumatic cylinder is then activated to close the moving mold and the fixed mold, while a torsion spring pulls the extrusion plate back to its original position, facilitating the removal of the injection-molded product adhering to the outside of the moving mold. However, in existing PVC box shell injection molding production, the cooling process is a critical factor affecting efficiency and quality. Excessive cooling time inside the mold severely restricts production efficiency; while premature demolding makes it difficult to quickly dissipate the large amount of heat stored in the product. Natural cooling is slow and cannot match the pace of automated production; air cooling, due to its limited cooling capacity and poor uniformity, easily leads to uneven cooling inside and outside the product, causing internal stress and deformation problems, directly affecting the dimensional accuracy and appearance qualification rate of the box shell. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a fully automated injection molding device for the inner shell of PVC bags, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a fully automatic injection molding device for the inner shell of a PVC bag, comprising a base, an injection molding component fixedly connected to the top of the base, a molding component fixedly connected to the left side of the injection molding component at the top of the base, the injection molding component and the molding component being movably connected, and a conical cylinder fixedly connected to the top of the injection molding component.

[0007] Its innovation lies in the fact that a cooling mechanism is fixedly connected to the left side of the base, and a cavity is opened inside the base to accommodate the cooling medium.

[0008] The cooling mechanism includes a water pump, a bend tube, and a horizontal tube. The water pump is fixedly connected to the left side of the base and communicates with the interior of the base's cavity. The bottom of the bend tube is fixedly connected to the water pump's outlet, and its top is fixedly connected to one end of the horizontal tube. A spray head is provided at the other end of the horizontal tube. The bend tube is made of an elastic material to accommodate the displacement of the horizontal tube.

[0009] To further optimize the spray range and angle, a slide rail is fixedly connected to the top of the base, and an electric slider is slidably connected to the outer wall of the slide rail. A first telescopic mechanism is fixedly connected to the top of the electric slider, and the output end of the first telescopic mechanism is connected to the horizontal tube via a connecting rod. Specifically, a first bearing is fixedly connected to the outer wall of the connecting rod, and the first bearing is rotatably connected to the horizontal tube, so that the horizontal tube can be driven by the electric slider to move horizontally along the slide rail, and can also be driven by the first telescopic mechanism to move up and down and deflect at an angle.

[0010] To achieve deep cooling during the product collection process, a fence box is placed on the outer wall of the base at the bottom of the molding component, and an impact mechanism is fixedly connected to the inner wall of the base cavity on the right side of the fence box.

[0011] The impact mechanism includes a second telescopic mechanism, a compression chamber, a movable plate, and a stop. The second telescopic mechanism is fixedly connected to the inner right side of the base cavity, and its output end is movably connected to a compression plate, which is movably disposed inside the compression chamber. The movable plate is rotatably connected to the left side of the compression chamber via a second bearing, and the outer wall of the movable plate has several airflow holes. The stop is fixedly connected to the inner bottom of the compression chamber to limit the rotational position of the movable plate, so that the movable plate closes the entrance of the compression chamber at a specific position.

[0012] In addition, waterproof plates are rotatably connected to the outer wall of the base on both sides of the fence box to prevent the cooling medium inside the cavity from splashing out.

[0013] A fully automatic injection molding device for the inner shell of a PVC bag includes a base, an injection molding component fixedly connected to the top of the base, a molding component fixedly connected to the top of the base on the left side of the injection molding component, and a cooling mechanism fixedly connected to the left side of the base.

[0014] The cooling mechanism includes:

[0015] A water pump is fixedly connected to the left side of the base, and the base has an internal cavity, with the water pump communicating with the cavity of the base.

[0016] A tortuous pipe, which is fixedly connected to the top of the water pump;

[0017] A horizontal tube, the top of which is fixedly connected to one end of the curved tube, and a spray head is provided at the other end of the horizontal tube.

[0018] Preferably, the injection molding component is movably connected to the molding component, and a conical cylinder is fixedly connected to the top of the injection molding component.

[0019] Preferably, a fence box is placed on the outer wall of the base at the bottom of the molded component, and waterproof plates are rotatably connected to both sides of the fence box on the outer wall of the base.

[0020] Preferably, a slide rail is fixedly connected to the top of the base, and an electric slider slides on the outer wall of the slide rail.

[0021] Preferably, a first telescopic mechanism is fixedly connected to the top of the electric slider, a connecting rod is movably connected to the top of the first telescopic mechanism, a first bearing is fixedly connected to the outer wall of the connecting rod, and the first bearing is rotatably connected to the horizontal tube.

[0022] Preferably, an impact mechanism is fixedly connected to the inner wall of the base cavity on the right side of the fence box.

[0023] Preferably, the impact mechanism includes a second telescopic mechanism, which is fixedly connected to the inner right side of the base cavity, and an extrusion plate is movably connected to the outer wall of the second telescopic mechanism.

[0024] Preferably, the base cavity is located between the fence box and the second telescopic machine, and a compression chamber is fixedly connected thereto. The second telescopic machine is movably connected to the inner wall of the compression chamber via a compression plate.

[0025] Preferably, a second bearing is rotatably connected to the left side of the extrusion chamber, and a movable plate is fixedly connected to the outer wall of the second bearing. The outer wall of the movable plate is provided with airflow holes.

[0026] Preferably, a stop block is fixedly connected to the inner bottom of the extrusion chamber, and the movable plate is in movable contact with the stop block.

[0027] This invention provides a fully automated injection molding device for the inner shell of PVC bags. It has the following advantages:

[0028] 1. The fully automatic injection molding device for the inner shell of this PVC bag, when using traditional injection molding equipment during continuous operation, generates a large amount of heat from the injection and molding components, easily causing the entire equipment to overheat, affecting accuracy and lifespan. This invention creatively designs the base with an internal cavity structure that can be filled with cooling water. This allows the base to transcend its traditional single support function. The cooling water flowing within the cavity can directly and continuously absorb the conductive heat generated by the injection and molding components above, providing a stable low-temperature environment for the core working unit.

[0029] 2. The fully automatic injection molding device for the inner shell of this PVC bag utilizes a cooling mechanism through the coordinated action of an electric slider, slide rail, and a first telescopic mechanism. The electric slider drives the spray head to reciprocate horizontally, covering a larger area at the outlet of the molded part. This reduces cooling blind spots and uneven cooling issues that may arise from fixed-point spraying, thereby minimizing product warping or dimensional deviations. Furthermore, the first telescopic mechanism allows for flexible adjustment of the horizontal pipe's height and angle, remotely changing the spray angle and distance of the spray head. Operators can customize the spray trajectory and posture according to the size, shape, and process requirements of different products, achieving a high degree of adaptability and flexibility.

[0030] 3. The fully automatic injection molding device for the inner shell of this PVC bag initially shapes the product in the molding cavity, and mainly relies on indirect water cooling of the base cavity for basic heat dissipation. After the mold is opened, the product temperature is still very high, and the spray mechanism performs surface spray cooling. The water mist evaporates rapidly (vaporization absorbs heat) to remove a large amount of surface heat with extremely high efficiency. After the product falls into the fence box, the impact mechanism performs deep cooling by water flow impact, further removing internal heat.

[0031] 4. The fully automatic injection molding device for the inner shell of this PVC case automatically realizes the "water suction-water spraying" cycle through the linear reciprocating motion of the second telescopic machine and the mechanical cooperation of the extrusion plate, extrusion chamber, movable plate and stop. When the extrusion plate retracts, the negative pressure causes the movable plate to rotate and open, completing the water intake; when the extrusion plate pushes out, the water pressure causes the movable plate to be blocked and closed by the stop, and the water flow is forced to be sprayed out at high speed from the air flow hole, transforming the static cooling water into a dynamic impact water flow, improving the cooling efficiency and realizing the internal efficient recycling of water resources. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the axial three-dimensional structure of the present invention;

[0033] Figure 2 For the present invention Figure 1Schematic diagram of cross-section structure;

[0034] Figure 3 For the present invention Figure 2 Enlarged structural diagram of section A in the middle;

[0035] Figure 4 This is a partial structural diagram of the cooling mechanism of the present invention;

[0036] Figure 5 This is a partial structural diagram of the waterproof membrane of the present invention;

[0037] Figure 6 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0038] Figure 7 This is a top-view three-dimensional structural diagram of the present invention;

[0039] Figure 8 This is a partial structural diagram of the impact mechanism of the present invention.

[0040] In the diagram: 1. Base; 2. Injection molded part; 3. Conical cylinder; 4. Molded part; 5. Fence box; 6. Waterproof membrane; 7. Cooling mechanism; 71. Water pump; 72. Bending pipe; 73. Horizontal pipe; 74. Slide rail; 75. Electric slider; 76. First telescopic mechanism; 77. Connecting rod; 78. First bearing; 8. Impact mechanism; 81. Second telescopic mechanism; 82. Extrusion chamber; 83. Second bearing; 84. Movable plate; 85. Airflow hole; 86. Stop block. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0043] Example 1, please refer to Figure 1-7 The present invention provides a technical solution: a fully automatic injection molding device for the inner shell of a PVC bag, including a base 1, an injection molding component 2 fixedly connected to the top of the base 1, a molding component 4 fixedly connected to the top of the base 1 on the left side of the injection molding component 2, and a cooling mechanism 7 fixedly connected to the left side of the base 1.

[0044] Cooling mechanism 7 includes:

[0045] Water pump 71 is fixedly connected to the left side of base 1. Base 1 has a cavity inside, and water pump 71 communicates with the cavity inside base 1.

[0046] The tortuous pipe 72 is fixedly connected to the top of the water pump 71;

[0047] The top of the horizontal tube 73 and the tortuous tube 72 are fixedly connected to one end of the horizontal tube 73, and a spray head is provided at the other end of the horizontal tube 73.

[0048] Injection part 2 is movably connected to molding part 4, and a conical cylinder 3 is fixedly connected to the top of injection part 2.

[0049] A fence box 5 is placed on the outer wall of the base 1 at the bottom of the molded part 4, and a waterproof plate 6 is rotatably connected to the outer wall of the base 1 on both sides of the fence box 5.

[0050] The top of the base 1 is fixedly connected to a slide rail 74, and the outer wall of the slide rail 74 is equipped with an electric slider 75.

[0051] The top of the electric slider 75 is fixedly connected to the first telescopic mechanism 76, the top of the first telescopic mechanism 76 is movably connected to the connecting rod 77, the outer wall of the connecting rod 77 is fixedly connected to the first bearing 78, and the first bearing 78 is rotatably connected to the horizontal tube 73.

[0052] The base 1 is set in the required position. First, the PVC raw material is mixed with various additives and pre-dried. Then, it is poured into the conical cylinder 3. Next, the injection molding component 2 melts and plasticizes the raw material. Then, under the injection pressure of the injection molding component 2, the molten raw material is quickly injected into the molding component 4. After the injection is completed, a certain pressure is maintained in the molding component 4 to compensate for the cooling and shrinkage of the raw material and ensure the stability of the product dimensions.

[0053] The base 1 has an internal cavity. An appropriate amount of cooling water is added to the cavity of the base 1 beforehand. The cooling water reduces the temperature of the base 1 and other devices, accelerating the cooling of the housing. The waterproof plate 6 is closed on the base 1 to prevent the cooling water in the cavity of the base 1 from leaking out.

[0054] The water pump 71 is connected to the cavity of the base 1. Then, the water pump 71 is powered on and started. Cooling water is output from the spray head through the tortuous pipe 72 and the horizontal pipe 73. The spray head is set at the top of the molding component 4, so that the water mist cools the shell when the molding component 4 is opened.

[0055] The tortuous tube 72 is made of an elastic material to accommodate the swinging motion of the horizontal tube 73;

[0056] When the electric slider 75 is powered on, it moves back and forth on the slide rail 74. The movement of the electric slider 75 changes the discharge position of the spray head on the horizontal pipe 73, thereby increasing the spray range. When the first telescopic machine 76 is powered on, it drives the horizontal pipe 73 to rise and fall, changing the spray angle of the spray head.

[0057] Example 2, please refer to Figure 1-8 Based on Embodiment 1, the present invention provides a technical solution:

[0058] An impact mechanism 8 is fixedly connected to the inner wall of the cavity of the base 1 on the right side of the fence box 5.

[0059] The impact mechanism 8 includes a second telescopic mechanism 81, which is fixedly connected to the inner right side of the cavity of the base 1, and an extrusion plate is movably connected to the outer wall of the second telescopic mechanism 81.

[0060] The cavity of the base 1 is located between the fence box 5 and the second telescopic machine 81 and is fixedly connected to the extrusion chamber 82. The second telescopic machine 81 is movably connected to the inner wall of the extrusion chamber 82 through the extrusion plate.

[0061] The left side of the extrusion chamber 82 is rotatably connected to a second bearing 83, and the outer wall of the second bearing 83 is fixedly connected to a movable plate 84, and the outer wall of the movable plate 84 is provided with an airflow hole 85.

[0062] A stop block 86 is fixedly connected to the inner bottom of the extrusion chamber 82, and the movable plate 84 is in contact with the stop block 86.

[0063] When the second telescopic machine 81 is powered on, it drives the extrusion plate to move. The extrusion plate moves within the extrusion chamber 82. When the second telescopic machine 81 causes the extrusion plate to retract, it guides the extrusion chamber 82 to produce a suction effect. The negative pressure in the extrusion chamber 82 causes the movable plate 84 to rotate, allowing water from the cavity of the base 1 to enter the extrusion chamber 82. Then, when the second telescopic machine 81 drives the extrusion plate to press into the extrusion chamber 82, the movable plate 84 is blocked by the stop block 86. The pressing of the extrusion plate causes the water in the extrusion chamber 82 to be sprayed out from the airflow hole 85 into the fence box 5. The box shell falls from the forming part 4 into the fence box 5, and then the water flows into the fence box 5 to cool the box shell.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fully automatic injection molding device for the inner shell of a PVC bag, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to an injection molding component (2), the top of the base (1) is fixedly connected to a molding component (4) on the left side of the injection molding component (2), and a cooling mechanism (7) is fixedly connected to the left side of the base (1). The cooling mechanism (7) includes: A water pump (71) is fixedly connected to the left side of the base (1). The base (1) has a cavity inside, and the water pump (71) is connected to the cavity inside the base (1). A tortuous pipe (72) is fixedly connected to the top of the water pump (71); A horizontal tube (73) is provided, with the top of the tortuous tube (72) fixedly connected to one end of the horizontal tube (73), and a spray head provided at the other end of the horizontal tube (73).

2. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 1, characterized in that: The injection molding component (2) is movably connected to the molding component (4), and a conical cylinder (3) is fixedly connected to the top of the injection molding component (2).

3. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 2, characterized in that: A fence box (5) is placed on the outer wall of the base (1) at the bottom of the molded component (4), and a waterproof plate (6) is rotatably connected to both sides of the outer wall of the base (1) at the fence box (5).

4. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 3, characterized in that: The top of the base (1) is fixedly connected to a slide rail (74), and an electric slider (75) slides on the outer wall of the slide rail (74).

5. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 4, characterized in that: The top of the electric slider (75) is fixedly connected to a first telescopic mechanism (76), the top of the first telescopic mechanism (76) is movably connected to a connecting rod (77), the outer wall of the connecting rod (77) is fixedly connected to a first bearing (78), and the first bearing (78) is rotatably connected to the horizontal tube (73).

6. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 5, characterized in that: The inner wall of the cavity of the base (1) is fixedly connected to the impact mechanism (8) on the right side of the fence box (5).

7. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 6, characterized in that: The impact mechanism (8) includes a second telescopic mechanism (81), which is fixedly connected to the inner right side of the cavity of the base (1), and an extrusion plate is movably connected to the outer wall of the second telescopic mechanism (81).

8. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 7, characterized in that: The cavity of the base (1) is located between the fence box (5) and the second telescopic machine (81) and is fixedly connected to the extrusion chamber (82). The second telescopic machine (81) is movably connected to the inner wall of the extrusion chamber (82) through the extrusion plate.

9. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 8, characterized in that: The left side of the extrusion chamber (82) is rotatably connected to a second bearing (83), and the outer wall of the second bearing (83) is fixedly connected to a movable plate (84), and the outer wall of the movable plate (84) is provided with airflow holes (85).

10. The fully automatic injection molding device for the inner shell of a PVC bag as described in claim 9, characterized in that: A stop block (86) is fixedly connected to the inner bottom of the extrusion chamber (82), and the movable plate (84) is in contact with the stop block (86).

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