Injection molding and paint spraying one-step forming mold for plastic handicrafts

Abstract

The utility model provides a plastic artware injection molding and paint spraying one-step forming mould which comprises a workbench, a first front mould, a rear mould and a second front mould are sequentially arranged on the workbench from left to right, the first front mould and the second front mould are symmetrically arranged on the left side and the right side of the rear mould, and the first front mould and the second front mould are the same in structure. The first front mold comprises a front mold body and a pushing air cylinder, an operation box is arranged below the workbench, a rotating piece is arranged in the operation box, and the rotating piece comprises a motor and a movable plate. The injection mold has the beneficial effects that the first front mold, the rear mold and the second front mold form a one-step forming mold, so that plastic materials are respectively injected from the first front mold and the second front mold, and the situation that the materials are crossed, mixed and polluted is avoided; meanwhile, by means of a rear mold rotating mode, the first front mold and the second front mold are installed in a matched mode, and the follow-up double-layer paint spraying function is achieved; and under the action of the pushing air cylinder, comprehensive paint spraying and material taking are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection mold equipment, and is particularly suitable for a one-step molding mold for injection molding and painting of plastic handicrafts. Background Art

[0002] After spray painting of plastic handicrafts, the following effects can be obtained: 1. It can cover the surface defects of the molded parts; 2. Because it is difficult to color the plastic parts themselves, spray painting can be used to obtain a variety of colors; the electrostatic performance of plastic parts is improved and dust absorption is reduced; 3. The hardness and scratch resistance of plastic parts are enhanced; the weather resistance of plastic parts is improved; 4. The gloss of the surface of plastic parts can be adjusted arbitrarily, and some special paints such as sand grain paint and fluff paint can obtain a better appearance and feel. In the past, injection molding and spray painting were carried out separately. In order to improve production efficiency, the in-mold spray painting process, that is, the integrated molding process combining thermoplastic injection molding and reaction film coating, has received widespread attention in the industry. In the existing one-step molding process of injection molding and spray painting, the mold is crucial. In order to facilitate spray painting, the injection mold is divided into two front molds and one rear mold. When injecting materials from one rear mold, material contamination is prone to occur; it is inconvenient to remove the finished product from the rear mold after spray painting, and the operation efficiency is low. Utility Model Content

[0003] The utility model aims to provide a one-step molding mold for plastic handicraft injection molding and painting, which can separately inject plastic material from a front mold, and the rear mold can be raised and lowered, so that painting can be completed during material discharge.

[0004] The technical solution of the utility model is: a one-step molding mold for injection molding and painting of plastic handicrafts, comprising a workbench, on which a first front mold, a rear mold, and a second front mold are arranged in sequence from left to right, the first front mold and the second front mold are symmetrically arranged on the left and right sides of the rear mold, and the first front mold and the second front mold have the same structure.

[0005] The first front mold comprises a front mold body and a push cylinder. A connecting block is provided on the left outer side of the front mold body. A material inlet cavity is provided on the connecting block, and the material inlet cavity is connected to the injection port on the left wall of the front mold body. The piston rod of the push cylinder is connected to the left outer wall of the connecting block. A plurality of positioning rods are provided on the right side of the front mold body. The front and rear sides of the front mold body are both arranged on the workbench through corresponding slides.

[0006] The left side of the rear mold is provided with a positioning groove matched with the positioning rod, and a rotating disk is provided on the outer side of the bottom end of the rear mold. An operation box is provided below the workbench, and a rotating member is provided in the operation box. The rotating member includes a motor and a moving plate. The motor is provided on the moving plate, and the output shaft of the motor passes through the hole on the top wall of the operation box and the hole on the workbench, and is connected to the rotating disk. The front and rear sides of the moving plate are respectively connected to the front rod and the rear rod, and the front rod and the rear rod are respectively slidably provided in the front groove and the rear groove on the front and rear walls of the operation box. The lower surface of the moving plate is connected to the piston rod of the pushing cylinder, and the pushing cylinder is fixed on the bottom wall of the operation box.

[0007] The upper ends of the first front mold and the second front mold are both provided with a paint spraying box, the paint spraying box is provided with a pumping pump, and the outside of the paint spraying box is provided with a spray head, the pumping pump is connected to the spray head through a spray pipe, and the spray head is located outside the paint spraying box and faces the rear mold.

[0008] Preferably, the inner diameter of the material entering the cavity decreases from left to right.

[0009] Preferably, the pushing cylinder is arranged on the workbench through a vertical plate.

[0010] Preferably, the slide is an L-shaped slide plate, one end of which is slidably arranged in a slide groove on the side of the workbench, and the other end is fixed on the front mold body.

[0011] Preferably, a slider is provided on the outer side of the bottom end of the front mold body, a slide rail matching the slider is provided on the workbench, and the slider is slidably arranged in the slide rail.

[0012] Preferably, an annular groove is provided on the workbench, and a sliding rod matching the annular groove is provided on the lower surface of the rotating disk, and the sliding rod is engaged in the annular groove when sliding.

[0013] Preferably, bearings are provided between the output shaft of the motor and the hole on the top wall of the operating box and the hole on the workbench.

[0014] The advantages and positive effects of the utility model are as follows: due to the adoption of the above technical scheme, the first front mold, the rear mold and the second front mold form a one-step molding mold, so that materials can be injected from the first front mold and the second front mold respectively, avoiding the occurrence of cross-mixing and contamination of materials; at the same time, the rear mold is rotated to achieve the coordinated installation with the first front mold and the second front mold, as well as the subsequent double-layer painting function; under the action of the pushing cylinder, the rear mold rises, and paint is sprayed while rising, and the product is finally removed after the painting is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure:

[0017] 1. Workbench 2, rear mold 3, second front mold

[0018] 4. Front mold body 5. Push cylinder 6. Connecting block

[0019] 7. Material enters the cavity 8. Positioning rod 9. Sliding piece

[0020] 10. Rotating plate 11. Operation box 12. Motor

[0021] 13. Moving plate 14. Front rod 15. Pushing cylinder

[0022] 16. Slider 17. Paint spray box 18. Spray head DETAILED DESCRIPTION

[0023] like Figure 1 As shown, the technical solution of the utility model is a one-step molding mold for injection molding and painting of plastic handicrafts, comprising a workbench 1, on which a first front mold, a rear mold 2, and a second front mold 3 are arranged from left to right, the first front mold and the second front mold 3 are symmetrically arranged on the left and right sides of the rear mold 2, and the first front mold and the second front mold 3 have the same structure.

[0024] The first front mold includes a front mold body 4 and a pushing cylinder 5. A connecting block 6 is provided on the left outer side of the front mold body 4, and a material entry cavity 7 is provided on the connecting block 6. The material entry cavity 7 is connected to the injection port on the left wall of the front mold body 4. The piston rod of the pushing cylinder 5 is connected to the left outer wall of the connecting block 6. A plurality of positioning rods 8 are provided on the right side of the front mold body 4. The front and rear sides of the front mold body 4 are both arranged on the workbench 1 through their respective corresponding slides 9.

[0025] The left side of the rear mold 2 is provided with a positioning groove that matches the positioning rod 8. During installation, the positioning rod 8 is inserted into the positioning groove to ensure installation preparation. A rotating disk 10 is provided on the outer side of the bottom end of the rear mold 2. An operating box 11 is provided below the workbench 1. A rotating part is provided in the operating box 11. The rotating part includes a motor 12 and a moving plate 13. The motor 12 is provided on the moving plate 13. The output shaft of the motor 12 passes through the hole on the top wall of the operating box 11 and the hole on the workbench 1, and is connected to the rotating disk 10. The front and rear sides of the moving plate 13 are respectively connected to the front rod 14 and the rear rod. The front rod 14 and the rear rod are respectively slidably arranged in the front groove and the rear groove on the front and rear walls of the operating box. The lower surface of the moving plate 13 is connected to the piston rod of the pushing cylinder 15, and the pushing cylinder 15 is fixed on the bottom wall of the operating box 11.

[0026] A paint spray box 17 is provided at the upper end of the first front mold and the second front mold 3. A pump is provided inside the paint spray box 17. A nozzle 18 is provided outside the paint spray box 17. The pump is connected to the nozzle 18 through a nozzle. The nozzle 18 is located outside the paint spray box and faces the rear mold 2.

[0027] In this embodiment, the inner diameter of the material entry cavity 7 decreases from left to right, which has a buffering effect on the material injected into the front mold body 4.

[0028] In this embodiment, the pushing cylinder 5 is arranged on the workbench 1 through a vertical plate.

[0029] In this embodiment, the slide 9 is an L-shaped slide plate, one end of which is slidably arranged in a slide groove on the side of the workbench 1 , and the other end is fixed on the front mold body 4 .

[0030] In this embodiment, a slider 16 is provided on the outer side of the bottom end of the front mold body 4, and a slide rail matching with the slider 16 is provided on the workbench 1, and the slider 16 is slidably arranged in the slide rail.

[0031] In this embodiment, an annular groove is provided on the workbench 1, and a slide bar matching the annular groove is provided on the lower surface of the rotating disk 10. When the slide bar slides, it is engaged in the annular groove.

[0032] In this embodiment, bearings are provided between the output shaft of the motor 12 and the holes on the top wall of the operation box 11 and the holes on the workbench 1 respectively.

[0033] The working process and principle of this example are as follows: when injection molding a product, the first front mold and the rear mold 2 are installed together to form a first mold cavity, and the first material injection device injects material into the material on the first front mold into the cavity. After molding, the first front mold and the rear mold 2 are separated; then the motor 12 drives the rotating disk 10 to rotate the rear mold 2 toward the second front mold, and then the second front mold 3 and the rear mold 2 are connected to form a molded part combination mold to form the first mold cavity, and the second material injection device injects material into the material on the second front mold 3. After the overall molding, the second front mold 3 and the rear mold 2 are separated, and finally the push cylinder 15 is started to push the rear mold 2 upward. During the rising process, the pumping pump of the paint spray box 17 sprays the paint liquid from the nozzle 18 to the handicraft, and the finished product is taken out after spraying.

[0034] In addition, this product can also be used for handicrafts that need to spray two layers of paint. The first layer of paint can be injected into the paint spray box 17 corresponding to the first front mold, and the second layer of paint can be injected into the paint spray box 17 corresponding to the second front mold 3. After spraying the first layer of paint, the motor 12 is rotated 180° to spray the second layer of paint.

[0035] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A one-step molding mold for plastic handicrafts injection molding and painting, characterized in that: The invention comprises a workbench, on which a first front mold, a rear mold and a second front mold are arranged in sequence from left to right, wherein the first front mold and the second front mold are symmetrically arranged on the left and right sides of the rear mold, and the first front mold and the second front mold have the same structure. The first front mold comprises a front mold body and a push cylinder. A connecting block is provided on the left outer side of the front mold body. A material inlet cavity is provided on the connecting block, and the material inlet cavity is connected to the injection port on the left wall of the front mold body. The piston rod of the push cylinder is connected to the left outer wall of the connecting block. A plurality of positioning rods are provided on the right side of the front mold body. The front and rear sides of the front mold body are both arranged on the workbench through corresponding slides. The left side of the rear mold is provided with a positioning groove matched with the positioning rod, and a rotating disk is provided on the outer side of the bottom end of the rear mold. An operation box is provided below the workbench, and a rotating member is provided in the operation box. The rotating member includes a motor and a moving plate. The motor is provided on the moving plate, and the output shaft of the motor passes through the hole on the top wall of the operation box and the hole on the workbench, and is connected to the rotating disk. The front and rear sides of the moving plate are respectively connected to the front rod and the rear rod, and the front rod and the rear rod are respectively slidably provided in the front groove and the rear groove on the front and rear walls of the operation box. The lower surface of the moving plate is connected to the piston rod of the pushing cylinder, and the pushing cylinder is fixed on the bottom wall of the operation box. The upper ends of the first front mold and the second front mold are both provided with a paint spraying box, the paint spraying box is provided with a pumping pump, and the outside of the paint spraying box is provided with a spray head, the pumping pump is connected to the spray head through a spray pipe, and the spray head is located outside the paint spraying box and faces the rear mold.

2. A one-step molding mold for plastic handicrafts injection molding and painting according to claim 1, characterized in that: The inner diameter of the material entering the cavity decreases from left to right.

3. A one-step molding mold for plastic handicrafts injection molding and painting according to claim 1, characterized in that: The pushing cylinder is arranged on the workbench through a vertical plate.

4. A one-step molding mold for plastic handicrafts injection molding and painting according to claim 1, characterized in that: The slide is an L-shaped slide plate, one end of which is slidably arranged in a slide groove on the side of the workbench, and the other end is fixed on the front mold body.

5. The one-step molding mold for injection molding and painting of plastic handicrafts according to claim 1, characterized in that: A sliding block is arranged on the outer side of the bottom end of the front mold body, a sliding rail matched with the sliding block is arranged on the workbench, and the sliding block is slidably arranged in the sliding rail.

6. A one-step molding mold for plastic handicrafts injection molding and painting according to claim 1, characterized in that: The workbench is provided with an annular groove, and a slide bar matched with the annular groove is provided on the lower surface of the rotating disk. The slide bar is engaged in the annular groove when sliding.

7. The one-step molding mold for injection molding and painting of plastic handicrafts according to claim 1, characterized in that: Bearings are arranged between the output shaft of the motor and the holes on the top wall of the operating box and the holes on the workbench.

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