Glue-lacking glue supplementing device for injection molding product

Abstract

The utility model relates to a lacking glue filling device of injection molding product, including machine table, extruder, controller, six-way extrusion head, plug and needle tube, said extruder and controller are both installed on machine table, extruder and controller are electrically connected, the extrusion end of extruder protrudes out of machine table side, the six-way extrusion head is connected with the extrusion end of extruder through screw thread, and the needle tube is connected with the six-way extrusion head through screw thread. Six extrusion openings are formed in the side face of the six-way extrusion head, the six extrusion openings are all communicated with the extrusion end of the extruder, and the plug and the needle tube are connected into the six extrusion openings through threads respectively. According to the utility model, the plastic can be heated to a molten state and extruded from the needle tube, and the injection molding product is held by hand, and the glue-lacking part of the injection molding product is aligned with the tube orifice of the needle tube for receiving and filling, so that the glue-lacking injection molding product is repaired, and the rejection rate of the injection molding product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molded product repair, and specifically relates to a glue filling device for defective glue in injection molded products. Background Art

[0002] Injection molding is a method for manufacturing industrial product shapes. When producing injection molded products made of plastic materials, due to reasons such as insufficient drying time or temperature of the plastic raw materials, or low density of the plastic raw materials, fine bubbles often appear inside or on the surface of the injection molded products, and even in some places there is a lack of glue. For the bubbles on the surface of the injection molded products, the method of coating and coloring can be used for covering, while for the injection molded products with lack of glue, only scrapping treatment can be adopted. In the production of the same batch, if there is a lack of glue in the injection molded products, it often occurs in batches, resulting in a large number of injection molded products being scrapped and causing serious waste of production costs. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a glue filling device for defective glue in injection molded products, which can fill the molten plastic into the defective glue parts of the injection molded products to repair the defective glue injection molded products and reduce the scrapping rate of the injection molded products.

[0004] The technical solution of the utility model is as follows: A glue filling device for defective glue in injection molded products includes a machine table, an extruder, a controller, a six-way extrusion head, a plug and a syringe. The extruder and the controller are both installed on the machine table, the extruder is electrically connected to the controller, the extrusion end of the extruder protrudes from the side of the machine table, the six-way extrusion head is connected to the extrusion end of the extruder through a thread, six extrusion ports are provided on the side of the six-way extrusion head, and the six extrusion ports are all communicated with the extrusion end of the extruder. The plug and the syringe are respectively connected to the six extrusion ports through threads.

[0005] Further, two leg guard plates are symmetrically provided on the side of the machine table, and the syringe is located above the space between the two leg guard plates.

[0006] Further, the six-way extrusion head is composed of a regular hexahedron and a cylinder. The cylinder is connected to the extrusion end of the extruder through a thread. A cavity is provided in the regular hexahedron and the cylinder, and the cavity is respectively communicated with the six extrusion ports and the extrusion end of the extruder.

[0007] Further, an annular groove is provided in the middle of the cylinder, and a heating sheet is sleeved in the annular groove.

[0008] Further, plug-in slots are provided on the six sides of the regular hexahedron.

[0009] Further, a regular hexagonal platform is provided at the front end of the regular hexahedron, and the side length of the regular hexagonal platform is smaller than that of the regular hexahedron.

[0010] Further, a discharge port communicated with the cavity is provided at the front end of the regular hexagonal platform, and a closing screw can be installed in the discharge port.

[0011] Further, the plug includes a sealing plug and a material extrusion plug. The syringe and the material extrusion plug are respectively connected to two opposite extrusion outlets on a regular hexahedron, and there are multiple sealing plugs which are respectively connected to the remaining four extrusion outlets. A piston is provided at one end of the material extrusion plug located in the cavity, and the piston can slide into the syringe.

[0012] Further, a horizontally arranged handle is provided at the upper end of the material extrusion plug.

[0013] Further, the inner diameter of the syringe gradually decreases towards the outlet of the syringe.

[0014] Further, an inclined incision is provided at the outlet of the syringe.

[0015] Compared with the prior art, the advantages of the present utility model are as follows: The plastic can be heated to a molten state and extruded from the syringe. By holding the injection molded product and aligning the defective part of the injection molded product with the nozzle of the syringe for receiving and filling the material, the defective injection molded product can be repaired, thereby reducing the rejection rate of the injection molded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a combined state diagram of the six-way extrusion head, the plug and the syringe of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the six-way extrusion head of the present utility model;

[0020] Figure 4 is a structural schematic diagram of the material extrusion plug of the present utility model;

[0021] Figure 5 is a structural schematic diagram of the syringe of the present utility model.

[0022] Wherein: 1. Machine platform; 2. Extruder; 3. Controller; 4. Leg guard plate; 5. Six-way extrusion head; 6. Heating sheet; 7. Regular hexahedron table; 701. Discharge port; 8. Extrusion plug; 9. Syringe; 901. Cut; 10. Sealing plug; 11. Screw; 12. Piston; 13. Handle; 51. Regular hexahedron; 5101. Extrusion port; 5102. Insertion slot; 52. Cylinder; 5201. Annular groove. Detailed implementation mode

[0023] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the attached drawings and preferred embodiments to detail the specific implementation mode, structure, features and their effects of the present invention as follows.

[0024] As Figures 1-5 shown, a device for filling missing glue in injection molded products includes a machine platform 1, an extruder 2, a controller 3, a six-way extrusion head 5, a plug and a syringe 9. The extruder 2 and the controller 3 are both installed on the machine platform 1. The extruder 2 is electrically connected to the controller 3. The extrusion end of the extruder 2 protrudes from the side of the machine platform 1. The six-way extrusion head 5 is connected to the extrusion end of the extruder 2 by threads. Six extrusion ports 5101 are provided on the side of the six-way extrusion head 5. All six extrusion ports 5101 communicate with the extrusion end of the extruder 2. The plug and the syringe 9 are respectively connected to six of the extrusion ports 5101 by threads. According to the material of the injection molded product, the same plastic particles are selected and put into the hopper of the extruder 2. The plastic particles are dried and heated. The motor and screw of the extruder 2 are controlled by the controller 3 to run, and the plastic is heated to a molten state and extruded from the extrusion end. In the six-way extrusion head 5, the syringe 9 is installed in the lower extrusion port 5101, and the other five extrusion ports 5101 are closed by plugs. After the molten plastic enters the six-way extrusion head 5, it flows downward along the internal pipe of the syringe 9 and finally is extruded from the lower end of the syringe 9. By holding the injection molded product, the missing glue part of the injection molded product is aligned with the nozzle of the syringe 9 for receiving and filling the glue. Then, a hair dryer and a scraping plate are used to fill, scrape and dry the glue filling place to eliminate the repair marks on the injection molded product. The six-way extrusion head 5 adopted by this device can be rotated and adjusted, and the syringe 9 is set obliquely to adapt to different missing glue angles of different injection molded products. Two or three syringes 9 can also be installed at the same time for multi-person glue filling operations.

[0025] In the above embodiment, two leg guards 4 are symmetrically arranged on the side of the machine table 1, and the syringe 9 is located above the two leg guards 4; during the glue filling operation, since the temperature of the molten plastic is above 200 °C and it has a certain fluidity, it is easy to drip from the lower end of the syringe 9. The leg guards 4 are provided to prevent the molten plastic from dripping onto the human skin or trousers and prevent scalding or even more serious safety accidents. The six-way extrusion head 5 is composed of a regular hexahedron 51 and a cylinder 52. The cylinder 52 is connected to the extrusion end of the extruder 2 by a thread. A cavity is provided in the regular hexahedron 51 and the cylinder 52, and the cavities are respectively communicated with six extrusion ports 5101 and the extrusion end of the extruder 2; the regular hexahedron 51 can clamp a wrench, which is convenient for rotating and adjusting the angle of the six-way extrusion head 5, and the external thread on the cylinder 52 can be connected to the extruder 2; after the molten plastic enters the cavity horizontally, it flows vertically or obliquely from the extrusion port 5101 where the syringe 9 is located to the outlet of the syringe 9 and enters the glue-deficient position. An annular groove 5201 is provided in the middle of the cylinder 52, and a heating sheet 6 is sleeved in the annular groove 5201 to heat the exposed six-way extrusion head 5 to keep its temperature between 200 - 220 °C; plug slots 5102 are provided on the six side surfaces of the regular hexahedron 51, and heating rods can be inserted to heat the front and rear ends of the regular hexahedron 51 to ensure the stability of the temperature of the molten plastic in the cavity between them. All of the above ensure that the molten plastic has sufficient fluidity to pass through the syringe 9. A regular hexagonal platform 7 is provided at the front end of the regular hexahedron 51. The side length of the regular hexagonal platform 7 is smaller than that of the regular hexahedron 51, providing one more wrench position for the six-way extrusion head 5 to prevent there from being insufficient space for the wrench to adjust after the heating rod is inserted into the regular hexahedron 51. A discharge port 701 communicating with the cavity is provided at the front end of the regular hexagonal platform 7, and a sealing screw 11 can be installed in the discharge port 701; in the early stage of the screw extruding the molten plastic, the residues on the screw channel and the screw of the extruder 2 will be mixed into the molten plastic, or after the molten plastic stays in the six-way extrusion head 5 for a long time, part of the molten plastic needs to be emptied to ensure the cleanliness and density of the molten plastic, so as to ensure that the quality and visual effect after glue filling meet the requirements.

[0026] In the above embodiments, the plug includes a closed plug 10 and a material extrusion plug 8. The syringe 9 and the material extrusion plug 8 are respectively connected to two opposite extrusion outlets 5101 on the regular hexahedron 51. There are multiple closed plugs 10 which are respectively connected to the other four extrusion outlets 5101. One end of the material extrusion plug 8 located inside the cavity is provided with a piston 12 which can slide into the syringe 9; the closed plug 10 can block the redundant material extrusion ports to prevent the loss of molten plastic. Since the syringe 9 is relatively long and has no insulation measures, if external devices such as heating coils are installed, it is easy to cause the local temperature of the syringe 9 to be too high, which in turn causes the plastic to denature and affects the glue filling operation. Therefore, the syringe 9 is in a bare form. The plastic in the syringe 9 is likely to lose its fluidity due to temperature reduction. After a long time without glue filling operation, the piston 12 needs to be slid into the syringe 9, and pressure is applied to extrude the plastic in the syringe 9. The syringe 9 is refilled with plastic with better fluidity by the repeated movement of the piston 12 before the glue filling operation can be continued. During this process, since the connection between the material extrusion plug 8 and the extrusion outlet 5101 is a threaded connection, the screw feeding method can provide sufficient propulsion force for the piston 12 to overcome the relatively large pressure in the syringe 9. The upper end of the material extrusion plug 8 is provided with a horizontally arranged handle 13, which is convenient for rotating the material extrusion plug 8 to avoid high-temperature scalding; the end of the handle 13 is provided with heat-insulating material to provide further protection. The inner diameter of the syringe 9 gradually decreases towards the outlet of the syringe 9 to gradually increase the pressure of the molten plastic, ensuring that the molten plastic flowing out of the outlet of the syringe 9 does not carry bubbles and improving the quality of the plastic at the glue filling position. An inclined cut 901 is provided at the outlet of the syringe 9. When the syringe 9 is inclined, the injection molded product can be moved horizontally for the glue filling operation, which is convenient for repairing the injection molded product with gaps.

[0027] Description of the working mode of the present utility model:

[0028] At the extrusion outlets 5101 of the regular hexahedron 51 of the present device, a material extrusion plug 8, a sealing plug 10 and a syringe 9 are respectively installed. The installation positions are as follows: The material extrusion plug 8 and the syringe 9 are arranged one above the other, and the piston 12 of the material extrusion plug 8 is slidably inserted into the syringe 9. The other four remaining extrusion outlets 5101 are sealed with the sealing plugs 10, while the discharge port 701 is in an open state. According to the material of the injection molded product, the same plastic pellets are selected and put into the hopper of the extruder 2. The plastic pellets are dried and heated. Through the action of the motor and screw of the extruder 2, the plastic is heated to a molten state and extruded from the extrusion end. In the early stage of the screw extruding the molten plastic, the residues on the screw channel and screw of the extruder 2 will be mixed into the molten plastic and discharged from the discharge port 701 together with the molten plastic. After the residues are completely discharged, the material extrusion plug 8 is loosened to withdraw the piston 12 from the syringe 9, and the discharge port 701 is closed by the screw 11. The molten plastic is extruded from the syringe 9 under the cavity pressure, and the glue filling operation of the injection molded product can be carried out. By holding the injection molded product, the glue-deficient part of the injection molded product is aligned with the nozzle of the syringe 9 to receive and fill the glue. Then, a hair dryer and a scraping plate are used to fill, scrape and dry the glue-filling part to eliminate the repair marks of the injection molded product. During this process, the angle of the six-way extrusion head 5 can be adjusted by rotation to tilt the syringe 9 to adapt to different glue-deficient angles of different injection molded products. Two or three syringes 9 can also be installed simultaneously to carry out the glue filling operation by multiple people at the same time.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glue shortage compensation device for injection molded products, comprising a machine table, an extruder, a controller, a six-way extrusion head, a plug, and a syringe, characterized in that: The extruder and the controller are both installed on the machine table. The extruder is electrically connected to the controller. The extrusion end of the extruder protrudes from the side of the machine table. The six-way extrusion head is connected to the extrusion end of the extruder by threads. Six extrusion ports are provided on the side of the six-way extrusion head, and all six extrusion ports communicate with the extrusion end of the extruder. The plug and the syringe are respectively connected to six extrusion ports by threads.

2. The glue filling device for the plastic injection product according to claim 1, characterized in that: Two leg guards are symmetrically provided on the side of the machine table, and the syringe is located above the two leg guards.

3. The glue filling device for the glue shortage of the injection molded product according to claim 1, wherein: The six-way extrusion head is composed of a regular hexahedron and a cylinder. The cylinder is connected to the extrusion end of the extruder by threads. A cavity is provided in the regular hexahedron and the cylinder, and the cavity communicates with the six extrusion ports and the extrusion end of the extruder respectively.

4. The glue filling device for the plastic injection product with glue shortage according to claim 3, characterized in that: An annular groove is provided in the middle of the cylinder, and a heating sheet is sleeved in the annular groove.

5. The glue shortage compensation device for injection molded products according to claim 3, characterized in that: Plug-in slots are provided on the six sides of the regular hexahedron.

6. The glue shortage compensating device for injection molded products according to claim 3, characterized in that: A regular hexagonal platform is provided at the front end of the regular hexahedron. The side length of the regular hexagonal platform is smaller than that of the regular hexahedron. A discharge port communicating with the cavity is provided at the front end of the regular hexagonal platform, and a sealing screw can be installed in the discharge port.

7. The glue filling device for the glue shortage of the injection molded product according to claim 3, characterized in that: The plug includes a closed plug and a material extrusion plug. The syringe and the material extrusion plug are respectively connected to two opposite extrusion ports on the regular hexahedron. There are multiple closed plugs which are respectively connected to the other four extrusion ports. A piston is provided at one end of the material extrusion plug located in the cavity, and the piston can slide into the syringe.

8. The glue filling device for the glue shortage of the injection molded product according to claim 7, characterized in that: A horizontally arranged handle is provided at the upper end of the material extrusion plug.

9. The glue shortage filling device for injection molded products according to claim 1, characterized in that: The inner diameter of the syringe gradually decreases towards the outlet of the syringe.

10. The glue shortage filling device for injection molded products according to claim 1, characterized in that: An inclined cut is provided at the outlet of the syringe.

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