KR101547482B1 - A cylinder for supplying of foaming material - Google Patents

Abstract

The present invention relates to a cylinder for supplying a material for foam-molding, which has an improved structure to shorten the total length of the cylinder while making the cylinder have sufficient extrusion force, and prevent the material for foam-molding from agglomerating inside a cylinder cover to enhance extrusion performance. The cylinder for supplying a material for foam-molding according to the present invention comprises: a cylinder body having a cylindrical shape with one side opened to have an air inlet and a material inlet on the outside and a cylinder rod disposed inside to be capable of moving forward or backward; a cylinder cover connected to the opened one side of the cylinder body; and an inner case member connected to make a gap space inside the cylinder cover, through which air flows and to have a hollow inside through which a material passes and multiple through-holes to introduce air flowing from the air inlet through the gap space to the inside of the inner case member.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cylinder for supplying a foaming molding material,

The present invention relates to a cylinder for supplying a foamed molding material, and more particularly to a cylinder for injecting a molding material into a foam molding machine, which can make the entire volume compact, and prevent the molding material from aggregating and improve the extrusion performance And more particularly, to a cylinder for supplying foamed molding material whose structure is improved.

Generally, in a foam molding apparatus, foamed thermoplastic resin particles are filled in a mold frame made of a pair of molds, and then the foamed particles filled in the mold are heated by a heating medium to fuse them to each other to form molds .

At this time, the method of supplying the raw material to the mold frame provided on the frame of the foam molding machine is fixedly coupled to the mold so that the raw material flows into the die, and the raw material is fed to the mold while the cylinder rod is advanced by the operation of the cylinder do.

The conventional raw material supply apparatus includes a supply section in which a supply pipe for supplying a raw material to a mold frame is installed, an injection section for controlling the amount of the raw material when the raw material supplied to the supply section is introduced into the mold, And a cylinder which pressurizes and supplies the mold to the mold.

In this case, since the air inlet for supplying the air is fixed firmly to the cylinder for controlling the operation of the cylinder rod, it is necessary to install the material supplying device in consideration of the position of the air inlet when installing the material supplying device in the mold. There was a problem that difficulty was followed.

That is, an air inlet provided at the front of the cylinder is installed firmly fixed to the cylinder so that a backward operation can be performed in a state that the cylinder rod is advanced, and when the raw material supply device is installed in the mold, There is a problem in that the position of installing the material supply device in the mold frame is restricted because it must be installed in such a manner as not to be caught by other devices such as other parts in consideration of the position of the air inlet.

An example of a raw material supply device for a conventional foam molding machine is disclosed in Korean Patent Registration No. 10-1211175 entitled " raw material supply device for a foam molding machine "(registered on December 20, 2012) A cylinder part coupled and fixed to the raw material supply part, an injection part coupled to the raw material supply part to inject the raw material into the mold frame, and a fixing part fixing the injection part to the raw material supply part, A cylinder cover which covers the opening of the cylinder body and is fixedly coupled to the through hole formed in the body of the raw material supply part; A cylinder rod having one side positioned and the other side positioned in the through hole of the body through the cylinder cover, And a second air inlet is fixedly coupled to the outer side of the rotary body. The rotary body is formed with air guide grooves formed in the cylinder cover and a screw hole in which the packing is installed to cover the second air inlet, And a second air injection hole connected to the air guide groove of the cylinder cover is formed in the screw hole.

Another example of the raw material feeder for the conventional foam molding machine is disclosed in Korean Registered Patent Application No. 10-1211174, "Cylinder for raw material supply device" (Registered on December 25, 2012), which includes a cylinder body, a cylinder cover, And a first and a second air inlet ports which are respectively coupled to the cylinder body and the cylinder cover to supply air to the inside of the cylinder body, And the first and second air inlets are coupled to and fixed to the first and second air inlets, wherein the rotating body is provided with an air guide groove formed in a cylinder cover and a packing to cover the air guide groove, And a second air inlet hole is formed on the outer side of the second air inlet hole so that the second air inlet hole is screwed into the second air inlet hole.

Since the conventional cylinder for supplying foamed molding material requires a minimum length of the cylinder rod in order to obtain a sufficient pressure output, the length of the cylinder body for the stroke stroke of the cylinder rod becomes long, There is a disadvantage that it is difficult to interfere with the structure of the peripheral device due to the protruding portion to the outside or to change the mold design structure.

In addition, there is a fear that the molding material extruded from the cylinder rod is piled up in the cylinder cover, so that the extrusion function is deteriorated.

Korean Registered Patent No. 10-1211175 entitled " Material Feeding Device for Foaming Molding Machine "(Registered on December 22, 2012) Korean Registered Patent Publication No. 10-1211174 "Cylinder for raw material supply device" (registered on December 22, 2012)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to reduce the total length of a cylinder with sufficient pressure output, And an object of the present invention is to provide a cylinder for feeding foamed molding material with improved structure so as to improve extrusion performance.

According to an aspect of the present invention, there is provided a cylinder head, comprising: a cylinder body having a cylindrical shape with one side open and having an air inlet and a material inlet formed on the outside thereof and having a cylinder rod arranged to be movable forward and backward; A cylinder cover coupled to one side of the cylinder cover and an inner cylinder member coupled to the cylinder cover so as to have a clearance space through which air flows and having a hollow to allow the material to pass therethrough, And a plurality of through holes formed to perforate the air to flow the air into the inside.

And a chamber space part provided at an end of the inner barrel and temporarily filled with the raw material.

The through hole is formed so that the end portion cut by the lancing process is bent from the outside to the inside.

The through hole is formed so that the end portion cut by the lancing process is bent from the inside to the outside.

The chamber space portion is formed with a sloped surface inclined to have a diameter smaller than the diameter of the inner barrel member, and a plurality of ventilation holes are formed in the flange formed on the outer side of the end portion of the chamber space portion.

 According to the present invention, since the through hole and the vent hole are formed in the inner barrel member and the chamber space portion is formed, the discharge performance of the molding material filled in the inner barrel member can be greatly improved, thereby shortening the stroke stroke length of the cylinder rod It is possible to provide a sufficient pressure output, thereby reducing the overall length of the cylinder.

In addition, when the cylinder of the present invention having a length shorter than that of the conventional cylinder is installed in the mold, it has an advantage that interference with the mold structure can be eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a cylinder for supplying a foamed molding material according to the present invention. FIG.
Fig. 2 is an exploded perspective view of Fig. 1; Fig.
3 is a sectional view of a member according to the invention.
4 is a cross-sectional view showing another example of the through hole of the present invention.
5 is a cross-sectional view showing still another example of the through hole of the present invention.
6 is a cross-sectional view showing a coupled state of the present invention.

1 to 6, the cylinder for supplying foamed molding material according to the present invention is formed into a cylindrical shape with one side opened and has an air inlet 420 and a raw material injection port on its outer side and a cylinder rod A cylinder cover 310 coupled to one side of the cylinder body 310 to open and close the cylinder body 310 and a gap space 310 in which air flows in the cylinder cover 310; (500) having a plurality of through holes (520) formed therein for introducing air flowing from the air inlet (420) through the gap space into the interior of the inner container (500) .

Referring to FIGS. 1 and 2, the cylinder body 110 is provided with an air inlet 420 on the outer side to inject air from the outside. The air supplied to the air inlet 420 side is injected with compressed air by an external compressor.

A first pneumatic injection unit 710 is disposed at one end of the cylinder body 110 for advancing the cylinder rod 200 and a second pneumatic injection unit 710 is provided at the other end of the cylinder body 200 for the backward movement of the cylinder rod 200. [ A portion 720 is disposed.

The cylinder cover 310 is detachably coupled to one side of the cylinder body 110 that is opened to one side and is integrally formed to open the other end or is detachably coupled to the other side of the cap body 600 .

The cap member 600 is detachably coupled by a screw fastening method and has a function of an outlet for guiding the molding material discharged through the inner barrel member 500 toward the mold.

3, one end of the inner barrel member 500 is inserted into the cylinder cover 310 and has a cylindrical structure with one end and the other end opened to surround the end portion of the cylinder rod 200, A plurality of ventilation holes 505 are formed to provide a suction force generated when the flange is formed and the air in the gap space is escaped outward to the flange so as to extrude the molding material in the inner barrel member 500 to the outside.

When the number of the through holes 520 and the number of the vent holes 505 are increased, the pressure of the air injected through the air inlet ports 420 is also supplied. The number of the vent holes 505 must be reduced. Therefore, the number of the vent holes 505 is inversely proportional to the number of vent holes.

Accordingly, it is preferable that the through hole 520 of the inner barrel member 500 is formed by a plurality of two or three holes and the vent hole 505 is formed by a plurality of holes of 6 to 10.

The through-hole 520 of the inner barrel member 500 introduces air in the gap space into the inner barrel member 500 to disperse the bundle of the molding raw material at the end of the cylinder rod 200 to improve the extrusion performance of the molding material .

The through hole 520 of the inner barrel member 500 is formed at an oblique angle to guide the air introduced through the air inlet and the clearance space into the inner barrel member 500.

The through hole 520 of the inner barrel member 500 may be formed so that the end portion 520a cut by the lancing process in which no scrap is generated is inclined from the outside to the inside as shown in FIG. Likewise, the end 520 cut by the lancing process may be formed to be inclined from the inside to the outside.

When the cut end 520a is inclined from the inside to the outside, the air hits the cut end 520a to guide air into the inner barrel member 500. [

The inner cylinder member 500 is formed with a chamber space 510 at which the raw material is temporarily stored before being extruded to the outside.

The inclined surface 512 is formed in the chamber space portion 510 so as to have an inner diameter smaller than the inner diameter of the inner barrel member 500.

The reason why the inner diameter of the chamber space portion 510 is formed to be smaller than the inner diameter of the inner barrel member 500 is that the inner diameter of the cylinder rod portion 200 is smaller than the inner diameter of the cylinder rod 200, In order to improve the transmission performance of the pressure output from the end portion.

In addition, the chamber space 510 is filled with a predetermined amount before the molding material is extruded to the outside, whereby the extrusion responsiveness is improved.

6, as the pneumatic pressure is supplied into the cylinder cover 310 through the first and second pneumatic injection units 710 and 720, the cylinder rod 200 is operated forward and backward , After the foaming molding material is injected into the inner barrel member 500 through the raw material injecting part, the compressed air is supplied into the interstice space through the air inlet 420, and then the cylinder rod 200 described above is advanced, The molding material filled in the inner barrel member 500 is supplied to the interior of the mold for foam molding through the cap member 600 while passing through the chamber space portion 510.

At this time, the air passing through the vent hole 505 through the clearance space gives a suction force for pulling the molding material toward the cap member 600 side.

That is, the air passing through the vent hole 505 acts as a suction force for pulling out the molding material discharged through the outlet of the inner barrel member 500 to the outside, assisting the discharging function of the molding material.

The air passing through the clearance space is introduced into the inner barrel member 500 through the through holes 520 to prevent the molding material from being bundled at the end of the cylinder rod 200, As shown in FIG.

The chamber space portion 510 provided at the end of the inner barrel member 500 is filled with the molding material therein and the inclined surface 512 is formed to have an inner diameter corresponding to the end portion of the cylinder rod 200 So that it is possible to increase the discharge performance of the molding material during the advancing operation of the cylinder rod 200.

Accordingly, the present invention is characterized in that, as the through hole 520 and the vent hole 505 are formed in the inner barrel member 500 and the chamber space portion 510 is formed, the discharge performance of the molding material filled in the inner barrel member 500 So that it is possible to provide a sufficient pressure output even if the stroke length of the cylinder rod 200 is shortened, so that the entire length of the cylinder can be reduced.

Thus, when the cylinder of the present invention is installed in a mold, it has an advantage that interference with the mold structure can be eliminated.

110: cylinder body 200: cylinder rod
310: cover 410: material inlet
420: air inlet 500: inner cylinder member
505: vent hole 510: chamber space portion
512: slope 520: through hole
600: cap member 710, 720: first and second pneumatic injection parts

Claims (5)

A cylinder body 110 formed in a cylindrical shape with one side open and having an air inlet 420 and a material inlet 410 on its outer side and a cylinder rod 200 arranged to be movable forward and backward;
A cylinder cover 310 coupled to an open side of the cylinder body 110,
And an inner cylinder member (500) coupled to the cylinder cover (310) so as to have a clearance space through which air flows and having a hollow to allow the raw material to pass therethrough,
Wherein the inner barrel member (500) comprises a plurality of through holes (520) formed through the air inlet (420) to allow air flowing through the clearance space to flow therein. The method according to claim 1,
And a chamber space part (510) provided at an end of the inner barrel member (500) and temporarily filling the raw material. The method according to claim 1,
Wherein the through hole (520) is formed so that an end portion cut by lancing is bent from the outside to the inside. The method according to claim 1,
Wherein the through hole (520) is formed so that the end portion cut by the lancing process is bent from the inside to the outside. The method of claim 2,
The chamber space 510 includes an inclined surface 512 formed to have a diameter smaller than the diameter of the inner barrel member 500 and a plurality of air holes 505) is formed on the inner surface of the cylinder.

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