KR200279261Y1 - manifold for injection molding machine - Google Patents

Abstract

The present invention discloses a manifold for an injection molding machine.

The manifold for the injection molding machine of the present invention is provided in a substantially rectangular shape, and a resin flow path through which resin flows is formed in a predetermined pattern, and an installation hole is formed in which an electric heating heater is fitted around the resin flow path. The upper and lower cover manifolds which closely contact the main manifold, the upper and lower surfaces of the main manifold, and seal the resin flow path and the mounting hole from the outside, and the main manifold, the upper and lower cover manifolds. It comprises a coupling means for closely coupling with each other.

The injection molding machine manifold is formed of a copper-based metal having excellent thermal conductivity and workability, and the main manifold is formed. The upper and lower cover manifolds covering the upper and lower parts of the main manifold are metal materials having excellent rigidity. Since the molding process is not only ensures the ease of processing, but also has a lower capacity of the electric heating heater than before, there is an advantage that it can prevent the shortening of life due to the overload of the device in advance.

Description

Manifold for injection molding machine

The present invention relates to a manifold for an injection molding machine, and more particularly, to a manifold for an injection molding machine that enables the production of high-quality injection products by ensuring the ease of processing while increasing the degree of freedom of design.

In general, an injection molding machine is a machine for molding a product by injecting a molten synthetic resin into a mold having a predetermined shape, and such an injection molding machine includes a manifold for smoothly injecting molten synthetic resin.

That is, the injection molding machine is melted by putting a synthetic resin raw material into a cylinder provided on one side, the molten synthetic resin is injected into the mold in a liquid state, wherein the mold is usually composed of upper and lower molds symmetrically to each other Bar, the upper mold is provided with a manifold for evenly injecting the synthetic resin into a plurality of cavities formed in the lower mold, the bottom of the manifold is provided with a plurality of injection nozzles for injecting the synthetic resin into the cavity of the lower mold As a result, the cavity is filled with synthetic resin at high pressure. When the filled synthetic resin is solidified, the upper and lower molds are separated from each other to take out the molded product.

On the other hand, the manifold is provided with an electric heating heater that is supplied with power so that the molten liquid synthetic resin is not cured while the resin flows from the cylinder of the injection molding machine to the lower mold cavity.

1 is a plan view schematically showing a manifold for an injection molding machine according to the prior art, and as shown therein, the manifold 100 has a resin channel 120 through which a synthetic resin in a molten state is moved. An electric heating heater 200 is installed around the resin flow passage 120 to prevent the resin from solidifying.

Here, the electric heating heater 200 is provided in the form of a flexible pipe having a substantially circular cross section, the structure in which the heating wire 210 to generate heat by electricity supply therein.

The electric heating heater 200 maintains a constant temperature of the resin channel 120 by generating heat at a predetermined temperature, thereby preventing the resin flowing along the resin channel 120 from solidifying. do.

Figure 2 is a cross-sectional view showing a coupling structure of the electric heating heater according to the prior art, as shown in the upper and lower surfaces of the manifold 100, the installation groove 110 is formed around the resin flow path, The installation groove 110 is indented to have a substantially circular cross-sectional shape as shown in the figure.

Such an installation groove 110 is provided with an electric heating heater 200 which generates heat at a predetermined temperature under the control of a controller (not shown) provided outside, and the installation groove 110 in which the electric heating heater 200 is inserted. The opening of) is closed by the molding 250 made of a material having a relatively excellent thermal conductivity.

Here, the molding 250 is molded into a shape that is fitted into the opening of the installation groove 110 so as to completely close the opening of the installation groove 110, forging method forcibly indented using a hammer or the like. Combined by In the meantime, reference numeral 210 denotes a heating wire that is a heating element, and 220 denotes a heat insulating material.

However, the conventional injection molding machine as described above inserts the electric heating heater 200 into the installation grooves 110 provided on the upper and lower surfaces of the manifold 100, and then the installation groove 110 is a separate tool or machine Since the process of press-fitting into the molding 250 using the manufacturing process has a disadvantage in that the productivity is reduced due to the complicated manufacturing process, in particular, it causes a problem such as breakage of the electric heating heater in the process of pressing the molding.

In addition, the manifold should be made of a metal that is easy to process, has high thermal conductivity, and has excellent durability and rigidity. However, the metal having high thermal conductivity is easy to process and has high thermal conductivity. It is used.

Therefore, since the thermal conductivity of the manifold is low, the capacity of the electric heating heater installed therein can be relatively increased, resulting in a cost increase and a shortened life due to the overload of the device.

The present invention is devised to solve the above problems, and the object of the present invention is to increase the freedom of design and precision processing by constructing a main manifold having excellent thermal conductivity in which the resin flow path and the electric heating heater are installed. To provide a manifold for an injection molding machine.

Another object of the present invention is to provide a manifold for an injection molding machine which has very excellent thermal conductivity and processability, and at the same time, rigidity and durability.

1 is a plan view schematically showing a manifold for an injection molding machine according to the prior art,

2 is a cross-sectional view showing the "A-A" line of Figure 1 according to the prior art,

3 is an exploded perspective view showing a manifold for an injection molding machine according to the present invention;

Figure 4 is a cross-sectional view showing a coupling state of the manifold for injection molding machine according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: upper cover manifold 20: lower cover manifold

30: main manifold 31: resin flow

32: heater installation hole 40: electric heating heater

41: heating wire h: coupling hole

b: bolt n: nut

The manifold for an injection molding machine according to the present invention for realizing the above object is provided in a substantially rectangular shape, and a resin flow path through which resin flows is formed in a predetermined pattern, and an electric heating heater is disposed around the resin flow path. A main manifold formed with a heater installation hole into which is inserted; Upper and lower cover manifolds in close contact with upper and lower surfaces of the main manifold to seal the resin flow path and the heater installation hole from the outside; It characterized in that it comprises a coupling means for closely coupling the main manifold and the upper, lower cover manifold with each other.

The coupling means of the present invention, the coupling hole is formed in the position coinciding with the main manifold and the upper and lower cover manifold, the end is protruded to the outside by inserting the coupling hole integrally, protruding end It is characterized by consisting of a bolt to which the nut is fastened to the part.

The main manifold of the present invention is characterized in that a copper-based metal having excellent thermal conductivity is used, and the upper and lower cover manifolds are formed of a metal material having superior rigidity as compared to the main manifold.

Hereinafter, a preferred embodiment of the manifold for injection molding machine according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view showing a manifold for injection molding machine according to the present invention, Figure 4 is a cross-sectional view showing a coupling state of the manifold for injection molding machine according to the present invention.

As shown therein, the manifold for injection molding machine of the present invention is largely composed of a main manifold 30, an upper cover manifold 10, a lower cover manifold 20, and a coupling means.

The main manifold 30 is a rectangular plate-shaped metal member having a predetermined thickness, and as shown in the drawing, a resin channel 31 through which a synthetic resin in a molten state is moved is formed in a predetermined pattern. . Then, a heater installation hole 32 through which the electric heating heater 40 is inserted is formed around the resin flow passage 31. The main manifold 30 is preferably formed of a copper-based metal as an example of a metal having excellent thermal conductivity.

The electric heating heater 40 is inserted and fitted into the heater installation hole 32 of the main manifold 30 configured as described above.

The electric heating heater 40 is a heat pipe that is generated under the control of an external controller (not shown) so that the synthetic resin can be maintained in a molten state, and is made of a sus (SUS) -based material having excellent oxidation resistance. It is provided in the form. The electric heating heater 40 is provided with a heating wire 41 having a coil shape to heat the main manifold 30 described above, and between the heating wire 41 and the electric heating heater 40. The structure is filled with a heat insulating material (not shown) such as magnesium having excellent heat insulating performance.

The electric heating heater 40 as described above preferably has a size that can be fixed by the interference fitting the heater installation hole (32).

On the other hand, the main manifold 30 is the upper and lower cover manifolds 10, 20 are in close contact with each other, the resin flow passage 31 and the heater mounting hole 32 is the outside and It will have a sealed structure.

The upper and lower cover manifolds 10 and 20 are provided in the shape of a plate having a size substantially similar to that of the main manifold 30 described above, and relatively superior in rigidity to the main manifold 30 described above. It is made of metal having.

The upper and lower cover manifolds have a structure in which resin supply holes 21 and resin discharge holes 11 for supplying and discharging resin to the resin flow passage 31 formed in the main manifold 30 are formed at predetermined positions, respectively. to be.

The main manifold 30 and the upper and lower cover manifolds 10 and 20 configured as described above are coupled to each other by being firmly stacked by coupling means, and the coupling means is the main manifold. It consists of a coupling hole (h), a bolt (b) and a nut (n) interconnecting the 30 and the upper and lower cover manifolds (10) and (20).

That is, in the coupling means, the coupling hole h is formed to have the same size while communicating with each other at each corner of the main manifold 30 and the upper and lower cover manifolds 10 and 20. A bolt b having a thread longer than the stacking height of the main manifold 30 and the upper and lower cover manifolds 10 and 20 is inserted into the coupling hole h, and a nut (at the end thereof) is inserted into the coupling hole h. n) is fastened.

On the other hand, the coupling means in the present invention shows that the main manifold 30 and the upper and lower cover manifolds 10, 20 by screwing, but the present invention is not limited to the above main Various methods such as welding may be used as long as the manifold 30 and the upper and lower cover manifolds 10 and 20 are firmly coupled to each other.

The present invention is not limited to the embodiments described, it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the utility model registration claims of the present invention.

The manifold for injection molding machine constructed and operated as described above forms a main manifold with a copper-based metal having excellent thermal conductivity and processability, and the upper and lower cover manifolds covering the upper and lower parts of the main manifold are rigid. Molding with this excellent metal material not only ensures ease of processing, but also has the advantage that the capacity of the electric heating heater may be lower than before, thereby preventing shortening of life due to overload of the device.

In addition, since the processing of the resin flow path and the heater installation hole is easy, the degree of freedom in design is further increased, and as a result, the development of high quality manifolds is facilitated.

Claims (3)

A main manifold provided in a substantially rectangular shape and having a resin flow path through which resin flows, in a predetermined pattern, and a heater installation hole in which an electric heating heater is fitted around the resin flow path; Upper and lower cover manifolds in close contact with upper and lower surfaces of the main manifold to seal the resin flow path and the heater installation hole from the outside; Coupling means for closely coupling the main manifold and the upper and lower cover manifolds; Manifold for injection molding machine comprising a. The method of claim 1, wherein the coupling means comprises: a coupling hole formed at a position coinciding with the main manifold and the upper and lower cover manifolds; A bolt through which the coupling hole is integrally inserted so that an end portion protrudes outward and a nut is fastened to the protruding end portion; Manifold for injection molding machine, characterized in that consisting of. The manifold for injection molding machine according to claim 1, wherein the main manifold is formed of a copper-based metal having excellent thermal conductivity, and the upper and lower cover manifolds are formed of a metal material having superior rigidity as compared to the main manifold. Fold.