JP6085786B2 - Wire resin molding production equipment - Google Patents

Description

  The present invention relates to an apparatus for producing a linear resin molded product.

The production device for the linear resin molded product in the present application refers to, for example, a hollow molded product used in interior lighting equipment such as a lamp shade, while applying an adhesive to the resin thread on the outer periphery of the spherical mold. It is an apparatus for producing a hollow spherical shaped article or the like produced by removing a spherical mold after winding and drying.

  Conventionally, in order to form a linear molded product, a resin thread containing an adhesive is wound around a mold attached to a rotating shaft.

In addition, the molded product cannot be removed from the mold for a certain period of time until the adhesive of the wound resin yarn is dried and fixed.

Furthermore, since the resin yarn is wound around the rotating mold so as not to slip, the rotational speed of the mold cannot be increased beyond a certain level.

  Ideally, no adhesive is used and no drying time is required, material costs are reduced, production time is shortened, and a highly efficient filament resin molded product production process is established.

  Thus, for example, a method of injecting molten resin directly onto the filament from the nozzle of an injection molding machine and immediately winding it around a mold can be considered. However, because the injection state is unstable due to molding conditions and atmospheric conditions, the filament melt resin may not be continuously injected and may tear, and the winding speed of the winding mold cannot be made constant, and handling is also difficult. It is difficult and stable molding is difficult.

In order to solve this problem, the process for producing a molded product by finding the molding conditions in the linear melted resin, utilizing the weldability inherent in the resin, and utilizing the natural solidification due to the temperature decrease of the resin, It is very useful if it can be realized.

JP 2000-335825 A JP-A-53-16774

In the manufacturing apparatus of the linear laminate molded product of Patent Document 1, in the process of applying an adhesive to a resin yarn, winding it around a mold, and then drying and removing the mold, the drying time for using the adhesive is reduced. However, there are problems such as shortening of the manufacturing time, and a method for solving these problems is desired.

In the device molding method using plastic filaments of Patent Document 2, the molten filament resin injected from the nozzle of the injection molding machine is immediately used for molding, so that the position of the nozzle is fixed, and the shape of the molded product The limit will come out. Accordingly, it is an important problem to be solved that the relative positional relationship between the nozzle and the mold cannot be arbitrarily set in order to improve the design of the molded product.

In the present invention it has been made in view of the problems as described above, the molten filament resin is injected from the nozzle of the injection molding machine, in a flexible coiled hollow pipe until the resin injection port, stably induced・ Because we thought that a take-up mold base equipped with a drive device that can move freely was necessary for the mold that winds the line resin into various shapes, with the function to supply the line resin, The present invention has been filed.

In order to achieve the object of the present invention, a thermoplastic resin injection molding machine, a resin injection nozzle attached to the tip of the thermoplastic resin injection molding machine, and a coil having one end attached to the tip of the resin injection nozzle Heating-type hollow pipe, movable rotary type that winds up molten resin of the filaments injected from the molten resin injection port at the other end of the hollow pipe, and the horizontal axis and vertical axis that support this movable rotary type rotate respectively A movable take-up stand that is capable of linearly moving these in the front-rear, left-right, and up-down directions, and a control device that controls the respective linear movement and rotation of the movable take-up stand. Provided is a linear resin molding apparatus for producing a hollow molding including an interior lighting device cover.

In particular, in the above-described flexible coil-shaped heated hollow pipe, when the molten resin is guided, the movable rotary type moves linearly in the front-rear, left-right, and up-down directions, and rotates in the X-axis and Z-axis directions, respectively. It is possible to move in all directions. Further, the hollow pipe can be heated so as to keep the molten state of the resin passing therethrough.

In addition, the movable rotary type described above is provided with a movable take-up stand that can linearly move in the front-rear, left-right, and up-down directions, and can be rotated in the X-axis and Z-axis directions, respectively. By providing the control device for controlling, the linear resin molded product in the shape desired by the designer can be wound with the above-mentioned movable rotary mold.

It is also possible to provide a temperature sensor to the above-described flexible coil-shaped heating-type hollow pipe so as to control the temperature of the heater for heat insulation to prevent the molten resin from being cooled and solidified.

According to the linear resin molding apparatus of the present invention, it is possible to manufacture a hollow molded article including an interior lighting device cover having a shape desired by a designer. Furthermore, compared with other molding methods that use molds in the shape of an instrument, the mold production cost can be kept low, so that it is easy to deal with high-mix low-volume products.

It is a whole conceptual diagram concerning the present invention. It is a perspective view regarding the flexible hose and resin injection nozzle which concern on this invention. It is sectional drawing of the resin injection nozzle part which concerns on this invention. It is a related figure of the winding die and peripheral equipment which concern on this invention. It is an external view regarding the heater apparatus of the flexible hose which concerns on this invention. It is an external view regarding the some linear resin injection apparatus which concerns on this invention. It is an external view regarding the cross-sectional shape of the flexible hose which concerns on this invention.

FIG. 1 is an overall conceptual diagram according to the present invention. Molten resin is guided from the molding machine A 9 a and the molding machine B 9 b to the winding mold 4 through the flexible hose 2. At this time, the flexible hose 2 is heated by the slidac 8 and the ribbon heater 7 so that the molten resin is not solidified. The winding mold 4 is connected to a mold support 5b installed on a movable winding table a5a, and its X-axis (horizontal axis) and Z-axis (vertical axis) directions can be rotated respectively. Since the movable winding stand 5 can move linearly in the X direction (front and back), Y direction (left and right), and Z direction (up and down) , the guided molten resin can be wound on the winding mold 4. It becomes possible.

FIG. 2 is a perspective view of the flexible hose 2 and the resin injection nozzle 1 according to the present invention.
The linear resin molding apparatus of the present invention includes a resin injection nozzle 1 and a flexible hose 2 and is connected by a connecting portion 3 using a commercially available taper screw for piping. The resin injection nozzle 1 has a structure in which the resin introduction portion 1a side is attached to a nozzle of an injection molding machine, molten resin is taken into the resin injection nozzle 1, and the resin is sent from the connecting portion 3 to the flexible hose 2. The flexible hose 2 has a hollow pipe structure, has a resin injection port 2a for guiding resin to a mold, and can move in any direction using a bellows shape.

FIG. 3 is a cross-sectional view of the resin injection nozzle 1 of the flexible hose 2 according to the present invention. 2 and 3, a resin injection nozzle 1 includes a resin introduction portion 1a for taking in resin from the injection molding machine side, a male screw 1b for connecting a molding machine for attaching the resin injection nozzle 1 to the injection molding machine, and a flexible hose. The connecting portion female screw 1c used for connecting the two is provided. Thereby, it is possible to send molten resin into the flexible hose 2 from an injection molding machine.

FIG. 4 is a related view of the winding die 4 and peripheral devices according to the present invention. The winding die 4 is installed on a movable winding stand 5, and the movement of the movable winding stand 5 is controlled by a control device 6. The winding die 4 is supplied with molten resin from the flexible hose 2 of the injection molding machine. Furthermore, the rotation of the mold support part that supports the winding mold 4 in the X-axis (horizontal axis) and Z-axis (vertical axis) directions, and the X-direction (front-rear) and Y-direction (left-right) of the movable winding base 5 The linear movement in the Z direction (up and down) is controlled by the control device 6. By these controls, the molten filament resin can be wound around the mold. The operation will be described below. The resin melted in the cylinder of the injection molding machine is sent from the resin injection nozzle 1 attached to the tip of the cylinder to the flexible hose 2 through the connecting portion 3. The molten resin that has passed through the flexible hose 2 is discharged from the molten filament resin injection port 2 a and is received by the winding mold 4 installed on the movable winding stand 5. By changing the relative position of the molten filament resin injection port 2a and the winding die 4, a filament resin molded product having a shape desired by the designer can be manufactured.

FIG. 5 is an external view relating to the heater device of the flexible hose 2 according to the present invention. 2 and 5, since the molten resin is filled in the flexible hose 2, the flexible hose 2 needs to be heated and kept warm in order to maintain a molten state. The ribbon heater 7 is widely available on the market, and there are many types of ribbon heaters 7. The most effective use of the ribbon heater 7 is wrapped around the entire flexible hose 2. The ribbon heater 7 includes a power cord 7 a and is connected to a slidac 8 connected to a power source. The ribbon heater 7 can be adjusted in temperature by voltage adjustment by the slidac 8, and the temperature of the molten resin in the flexible hose 2 can be adjusted. It is possible to control the state. Moreover, a temperature sensor can be provided in the flexible hose 2 and automatic temperature control can be performed. Other temperature control devices can be used to adjust the heater temperature.

FIG. 6 is an external view relating to a plurality of linear resin injection devices according to the present invention. 2 and 6, as a method for interweaving and using a plurality of types of resins, colors, filament diameters, etc., different resins from a plurality of molding machines A9a and B9b are used as flexible hose 2. It is possible to manufacture a molded product by weaving a plurality of types of resins. This makes it possible to weave and twist different and different color resin materials such as PP (polypropylene) and PC (polycarbonate). The plurality of types is not limited to two types as shown in FIG.

FIG. 7 is an external view regarding the shape and cross-sectional shape of the flexible hose 2 according to the present invention. 2 and 7, the purpose of the flexible hose 2 is to freely move the resin injection port 2a, and the shape of the flexible hose 2 is not limited. Although the bellows-like flexible hose 2 is shown in FIG. 2, it may be a linear shape 10a or an arc shape 10b. Further, by making it possible to replace attachments having various cross-sectional shapes in the resin injection port 2a, it is possible to manufacture a molded product by changing the cross-sectional shape of the linear resin. The cross-sectional shape is a circle, an ellipse, or a polygon more than a triangle.

The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and it goes without saying that various modifications can be made without departing from the scope of the present invention. For example, in addition to an injection molding machine, an extrusion molding machine or the like can also be used.

Further, the present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be taken without departing from the gist of the present invention.

1 Resin injection nozzle,
1a Resin introduction part,
1b Male thread for connecting machine
1c female thread for connection
2 Flexible hose,
2a Resin injection port,
3 connecting part,
4 Winding mold,
5 Movable winding stand,
5a Movable take-up stand a,
5b mold support ,
6 Control device,
7 Ribbon heater,
7a Power cord,
8 Slidac 9a Forming machine A,
9b Molding machine B,
10a linear shape,
10b arc shape,

Claims (1)

A thermoplastic resin injection molding machine;
A resin injection nozzle attached to the tip of the thermoplastic resin injection molding machine;
A flexible coil-shaped heating-type hollow pipe with one end attached to the tip portion of the resin injection nozzle,
A movable rotary type for winding the molten resin of the filaments injected from the molten resin injection port at the other end of the hollow pipe;
A horizontal axis and a vertical axis that support the movable rotary mold, each of which is rotatable, and a movable winding stand that can move these linearly in the front-rear, left-right, and vertical directions;
A control device for controlling each linear movement and each rotation of the movable winding table;
A linear resin molding apparatus for producing a hollow molded article having a shape.