KR100674218B1 - Supporting device for a preform of Polyethylene terephthalate bottle - Google Patents

Abstract

The present invention relates to a support mechanism for PET bottle preforms, which is transferred in a process progressing direction while supporting a preform in a process of heat-treating and crystallizing the neck of a PET bottle, wherein the support ring (Pa) of the preform (P) is supported. Since the holder sleeve 400 of a heat insulating material that blocks heat transfer between the 200 and the preform P forms a structure installed in the upper opening 202 of the holder 200, the preform P may be formed by the holder sleeve 400 of the heat insulating material. Heat transfer between the holder and the holder 200 is blocked, and the neck of the preform P is heated to a proper temperature quickly and uniformly without heat loss, and satisfactorily crystallized, and the support ring Pa of the preform P is held in the holder sleeve. Directly mounted on the support 400, there is an effect that the structure of the support mechanism is greatly simplified.

Description

Supporting device for a preform of Polyethylene terephthalate bottle

1 is a perspective view of a main portion of the support mechanism according to the prior art,

2 is a cross-sectional view showing a support mechanism according to the prior art,

3 is an enlarged view of a portion A of FIG. 2;

4 is an enlarged view of a portion B of FIG. 2;

5 is a cross-sectional view showing a support mechanism according to the present invention, corresponding to FIG.

6 is an enlarged view of a portion C of FIG. 5;

7 is a view showing another example of the support mechanism according to the present invention, corresponding to FIG. 1 showing the prior art,

FIG. 8 is a cross-sectional view of the support mechanism shown in FIG. 7, corresponding to FIG. 5;

FIG. 9 is an enlarged view of a portion D of FIG. 8.

-Explanation of terms for the main parts of the accompanying drawings-

11,12,13,14; Fastening member, 100; Base Block,

100a; First receiving groove, 100b; 2nd receiving groove,

100c; Fastening hole 110; Power Train,

120; Holder connection, 200; holder,

200a; Holes, 200b, 200c; Fastening Hole,

201; Bottom opening, 202; Top opening,

300; Preform shot support mechanism, 310; nut,

310a; Anti-rotation groove, 320; Preform supports,

321; Preform support, 321a; Preform receiving groove,

321b; Anti-rotation fastening groove, 322; Threaded connection,

330; Spring, 340; stopper,

350; Bush, 400; Holder sleeve,

410; Insert, 420; Jaw,

420a; Reinforcing member insertion holes, 421; Protruding Jaw,

500; Reinforcing members, 510; First Insertion Part,

520; Second insertion portion, P; Preform,

Pa; Bearing ring part.

The present invention relates to a PET bottle preform support mechanism for transferring the neck portion of the PET bottle in the process progressing direction while supporting the preform.

As is well known, when a storage material such as a beverage or grain is put into a PET bottle, if the hot feeding nozzle is in contact with or close to the neck, the neck may be deformed. PET bottles should be used.

In the PET bottle manufacturing, when the neck portion of the PET bottle preform is heated to an appropriate temperature for a predetermined time and then cooled, the particles of the neck portion crystallize to have a heat resistance function. The support mechanism is inserted into and supported by the same support mechanism, and the support mechanism is rotated by a separate transfer means and is transferred in the process progress direction. Therefore, the PET bottle preform is inserted into and supported by the support mechanism as shown in FIGS. 1 to 4, and is rotated and transferred in the process progress direction, so that the neck of the PET bottle exposed to the outside of the support mechanism is heated by the heater. After high temperature heat processing, it is cold-molded by the core chuck for cooling.

Conventional PET bottle preform support mechanism, as shown in Figures 1 to 4, the power transmission unit 110 and a holder located above the power transmission unit 110 is connected to a separate transfer means (not shown). A base block 100 having a connection part 120; A holder 200 in the form of a round tube, in which the lower opening 201 is fixed to the holder connecting portion 120 of the base block 100; The preform P inserted into the holder 200 is installed in the base block 100 so that the supporting ring Pa of the preform P is spaced apart from the upper opening 202 of the holder 200 by a predetermined interval. It forms a structure consisting of a preform shot support mechanism 300 to support the shot.

The shot support mechanism 300 may have a slightly different structure depending on a user's needs, but it will be generally as shown in FIGS. 1 to 4. According to this, the shot support mechanism 300, the nut 310 is installed in the second accommodation groove (100b) of the base block 100 to be linearly reciprocating movable; A preform support 320 having a preform support 321 on which the bottom of the preform P is mounted, and a thread fastening portion 322 protruding from the bottom of the preform support 321 and threaded to the nut 310; It is built in the second receiving groove (100b) of the base block 100 is composed of a nut 310 and the spring 330 to support the preform support 320 fastened thereto in an upward direction. In this case, the base block 100, as shown in Figures 1 to 3, the first receiving groove (100a) for receiving the threaded fastening portion 322 of the preform support 320 and the nut 310 And a second accommodation groove 100b in which the spring 330 is accommodated. Here, the reference numeral "340" is a stopper that is inserted into the second receiving groove (100b) of the base block 100 to prevent the separation of the nut 310, and the reference numeral "350" denotes the nut 310 While wrapping, the bush is installed in the second receiving groove 100b of the base block 100 to prevent direct friction between the base block 100 and the nut 310.

The power transmission unit 110 of the base block 100 is connected to a separate transfer device via a power transmission means such as a belt (not shown) or a sprocket, and the lower opening 201 of the holder 200 is a screw. It is fixed to the holder connection portion 120 of the base block 100 via a fastening member 11, such as a bolt. Here, reference numeral "200a" is a hole for allowing the preform P inserted into the holder 200 to be exposed to the outside to naturally cool, and reference numeral "200b" denotes the holder fixing fastening member 11. It is a fastening hole inserted through and threaded.

The operating state of this is as follows.

When the preform P is inserted into the holder 200 through the upper opening 202 of the holder 200, the bottom surface of the preform P is seated in the preform receiving groove 321 a of the preform support 321, The preform P is placed on the preform support 321, wherein the support ring portion Pa of the preform P is kept spaced apart from the upper opening 202 of the holder 200 by a predetermined interval.

In this state, the base block 100 is rotated by a separate transfer mechanism to move in the process progress direction, and the preform P inserted into the holder 200 is rotated together with the support mechanism to move in the process progress direction. In the state in which the preform P is transferred as described above, the neck of the preform P exposed to the upper portion of the upper opening 202 of the holder 200 is subjected to high temperature heat treatment.

According to the prior art as described above, the preform P is elastically supported by the preform elastic support mechanism 300, so that the supporting ring portion Pa of the preform P is spaced from the upper opening 202 of the holder 200 by a predetermined distance. Since the spaced state is maintained, the high temperature heat treatment of the preform P is satisfactorily performed. When the neck of the preform P is heated through a heater (not shown), the upper opening 202 of the holder 200 is heated by being exposed to the heater together with the neck of the preform P, but is exposed to the heater. The remaining portion of the holder 200, except for the upper opening 202 of the holder 200, which is heated, is exposed to the atmosphere without being exposed to the heater and is rapidly cooled, so that the holder 200 is not heated above a predetermined temperature { When the remaining portion except for the neck of the preform P is crystallized by heat treatment, product defects are caused during the subsequent blowing process, so that the holder 200 is generally made of a metal having high thermal conductivity. Therefore, during the heat treatment of the neck portion of the preform P, the remaining portion except for the neck portion of the preform P is naturally cooled through the hole 200a of the holder 200 which is kept at a low temperature so as not to be heated above a predetermined temperature. do.

In addition, since the nut 310 and the preform support 320 are elastically supported by the spring 330, the preform P is inserted into the holder 200 or the preform P is inserted into the holder 200. Even if the cooling core chuck (not shown) is press-fitted into the neck of the preform P to cool the neck of the heated preform P, the support ring of the preform P is buffered by the spring 330. The problem that Pa is damaged while hitting the upper opening 202 of the holder 200 is not generated.

In addition, since the nut 310 and the thread fastening portion 322 of the preform support 320 are threaded to be adjustable in height, there is an advantage that the preform P of various standards can be appropriately supported.

However, the support mechanism for PET bottle preforms according to the prior art has a method in which the preform P is elastically supported through the preform elastic support mechanism 300, and the structure thereof is considerably complicated, thereby increasing the product cost and As a result, problems have arisen that make repairs and maintenance difficult.

In addition, in order to prevent the nut 310 from being rotated in the second accommodation groove 100b of the base block 100, a fastening hole 100c is formed in the holder connection part 120 of the base block 100. After the anti-rotation groove 310a is formed in the nut 310, the nut 310 must be fixed to the base block 100 through a fastening member 12 such as a screw or bolt, and the preform support 320 is In order to prevent the height of the preform support 320 from being rotated, an anti-rotation fastening groove 321b is formed in the preform support 321, and the preform support 320 is provided via a fastening member 13 such as a screw or bolt. Has to be fixed to the holder 200 is caused.

Furthermore, the preform P inserted through the upper opening 202 of the holder 200 and placed on the preform support 321 of the preform shot support mechanism 300 is not supported in any direction in front, rear, left, and right, and thus the preform ( Since P) is inclined in any way to face the upper opening 202 of the holder 200, heat loss is generated through the contact portion between the preform P and the holder 200. As such, when contact occurs between the preform P being heated at a high temperature and the holder 200 maintaining a low temperature, a problem arises in that the contact portion is not sufficiently heat treated by heat loss, resulting in product defects.

In order to solve this problem, a "support mechanism for PET bottle preforms" has been proposed, such as Korean Patent Application No. 2004-101849, to which the applicant has previously filed.

The support mechanism according to this embodiment has a structure in which a rounded contact portion is formed directly or indirectly in the upper opening of the holder, and the support ring portion of the preform is directly supported on the contact portion of the holder.

Therefore, the conventional preform shot support mechanism 300 is unnecessary, so that the structure of the support mechanism is greatly simplified, the product cost of the support mechanism is greatly reduced, and maintenance and maintenance are advantageous.

However, such a support mechanism has a method of rounding the part where the bearing ring portion of the preform is supported and rounded to minimize the contact area between the holder and the preform, thereby minimizing the amorphous portion of the bearing ring portion of the preform. Compared with the support mechanism provided with the preform elastic support mechanism 300 as shown in FIGS. 1 to 4, the contact area between the holder and the preform has to be enlarged, which is rather disadvantageous in the crystallization of the preform neck portion (same temperature). Under the conditions, the neck of the preform (P) must be heated for a longer time or the heating temperature of the neck of the preform (P) must be higher in consideration of the heat loss under the same heating time conditions.

Accordingly, the present invention has been invented to solve the above problems, it is an object of the present invention to provide a support for the PET bottle reform to ensure that the crystallization of the preform neck portion is made simple yet.

The present invention for achieving the above object, the base block having a power transmission unit and a holder connection; A PET bottle preform support mechanism having a holder in the form of a circular tube in which a lower opening is fixed to a holder connection portion of a base block. It is a structure characterized in that the holder sleeve of the insulating material to be blocked is reinforced.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

5 and 6 are views showing the present invention, the same reference numerals are attached to the same parts as in FIGS. 1 to 4 showing the prior art, and description thereof will be omitted.

5 and 6, the support mechanism for PET bottle preform according to the present invention, the base block 100 having a power transmission unit 110 and the holder connecting portion 120; A holder 200 having a circular tube shape in which the lower opening 201 is fixed to the holder connection part 120 of the base block 100; Installed in the upper opening 202 of the holder 200, while supporting the support ring portion (Pa) of the preform (P), to the holder sleeve 400 of the insulating material to block heat transfer between the holder 200 and the preform (P) The structure is made up.

The holder sleeve 400, while having better heat resistance than the PET bottle preform (P), any of the well-known that can block the heat transfer between the holder 200 and the preform (P) is applicable. In the case of the present embodiment, the holder sleeve 400 was made of PTFE (Poly Tetra Fluoro Ethylene), which is a fluorocarbon resin (also referred to as Teflon). The PTFE has almost perfect chemical inertness, heat resistance, and excellent insulation stability, as well as properties such as non-tackiness and low coefficient of friction, and when the PTFE material is applied to the holder sleeve 400, the preform (P) is used. ) Is naturally inserted into or out of the holder sleeve 400 without friction, so that the preform P does not interfere with the holder sleeve 400 to be scratched or damaged. In view of this point, it can be said that it is preferable to apply to the holder sleeve 400 is made of the PTFE.

In addition, in the present embodiment, the insertion portion 401 to be inserted into the upper opening 202 of the holder 200, and the locking step 420 is supported by mounting the supporting ring portion (Pa) of the preform (P) Was applied to the holder sleeve 400. However, the shape and shape of the holder sleeve 400 may be variously modified as necessary. For example, the holder sleeve 400 may have a simple tubular shape without the catching jaw 420. In this case, the holder sleeve 400 may protrude upward from the upper opening 202 of the holder 200. Thus, the support ring portion Pa of the preform P fitted to the holder sleeve 400 should not interfere with the upper opening 202 of the holder 200.

Referring to the preform neck crystallization operation using the support mechanism according to the invention as follows.

First, in a state where the insertion portion 420 of the holder sleeve 400 is inserted into and fixed to the upper opening 202 of the preform 200, the preform P is introduced into the holder 200 through the holder sleeve 400. By inserting, the support ring portion Pa of the preform P is placed on the locking jaw 410 of the holder sleeve 400.

Thereafter, the base block 100 is moved in the process progress direction by a separate transfer mechanism, so that the preform P inserted into the holder 200 moves in the process progress direction together with the support mechanism. In the state in which P is transferred, the neck of the preform P exposed to the upper portion of the upper opening 202 of the holder 200 is heat-treated by a separate heater (not shown).

Note that, even though the neck of the preform P is heated by the heater, heat transfer between the preform P and the holder 200 is blocked by the holder sleeve 400 of the insulating material, and thus, the preform P The neck is heated to the right temperature quickly and uniformly without any heat loss and satisfactorily crystallized. In fact, in the case of using the support mechanism according to the Republic of Korea Patent Application No. 2004-101849, the heat loss is larger than the support mechanism shown in Figures 1 to 4, in order to satisfactorily crystallize the neck of the preform (P) The heating temperature must be increased or the heating time must be increased. On the other hand, in the case of the support mechanism according to the present invention, since the heat transfer between the preform P and the holder 200 is fundamentally blocked by the holder sleeve 400, the support mechanism shown in Figs. In comparison, even if the heating temperature is lowered or the heating time is shortened, crystallization of the neck of the preform (P) is satisfactorily achieved.

On the other hand, Figures 7 to 9 show another example of the support mechanism according to the present invention, which will be described below.

7 to 9, a reinforcing member insertion hole 420a having an enlarged inner diameter is formed in the holder sleeve 400, and an upper end of the holder sleeve 400 on which the support ring portion Pa of the preform P is mounted and supported. The projection jaw 421 protruding toward the center of the inner diameter of the holder sleeve 400 is provided at the same time, the first inserting portion 510 inserted into and fixed to the upper opening 202 of the holder 200 and the holder sleeve 400. The reinforcement member 500 having a tubular shape is provided with a second insertion portion 520 inserted into and fixed to the reinforcement member insertion hole 420a of the holder, and the holder sleeve 400 has an upper opening of the holder 200. 202 and the second insertion portion 520 of the reinforcing member 500, characterized in that the insertion is fixed. The reinforcing member 500 is preferably applied to a metal material having a high thermal conductivity, such as the holder 200, is inserted and fixed in the upper opening 202 of the holder 200 is maintained at a low temperature, the same as the holder 200 Keep low temperature.

In this embodiment, when the preform P is inserted into the holder sleeve 400, the inner circumferential surface of the protruding jaw 421 of the holder sleeve 400 and the inner circumferential surface of the reinforcing member 500 are exposed toward the preform P. Therefore, it is possible to more precisely control the high temperature heat treatment of the neck portion of the preform P by adjusting the thickness of the holder sleeve protruding jaw 421.

This will be described in more detail as follows.

After inserting the preform P into the holder sleeve 400, when the neck of the preform P is subjected to high temperature heat treatment, the neck of the preform P exposed to the outside is directly heated by a heater. When the neck portion of the preform P exposed to the high temperature is directly heated by the heater, it is heated to a region adjacent to the neck portion of the preform P by heat conduction and crystallization is performed. In this case, when the reinforcing member 500 is not used, control of the crystallization site by high temperature heat treatment is virtually impossible, but the portion adjacent to the protruding jaw 421 of the holder sleeve 400 using the reinforcing member 500 is used. When the remaining portion is quickly cooled except for, the crystallization of the preform P by the high temperature heat treatment is made only up to the portion adjacent to the protruding jaw 421 of the holder sleeve 400. Therefore, by adjusting the thickness of the holder sleeve protrusion jaw 421, it is possible to more precisely control the high temperature heat treatment of the neck of the preform P (the thicker the holder sleeve protrusion jaw 421, the preform support ring portion Pa). ) And the crystallization portion downward from the preform support ring portion Pa is reduced as the thickness of the holder sleeve protruding jaw 421 becomes thinner.

The present invention is not limited to the embodiment as described above, and of course, various modifications can be made without departing from the scope of the following claims.

For example, in the present embodiment, the insertion portion 410 of the holder sleeve 400 is fitted to the upper opening 202 of the holder 200 to be firmly fixed via the fastening member 14, If necessary, the insert 410 of the holder sleeve 400 is simply press-fitted to the top opening 202 of the holder 200, or the insert 410 of the holder sleeve 400 and the holder 200 are fixed. The top openings 202 may be threaded to each other, and of course, the top openings 202 of the holder 200 may be fitted to the insertion portion 410 of the holder sleeve 400.

In addition, the diameter of the holder 200 is formed large enough to accommodate all the preforms (P) of various standards, and select the holder sleeve 400 of the appropriate standard according to the specifications of the preform (P) Thus, by simply replacing the holder sleeve 400 without replacing the holder 200, the support mechanism may be able to properly accommodate all of the preform (P) of various specifications.

According to the present invention as described above, the holder sleeve 400 of the insulating material for blocking the heat transfer between the holder 200 and the preform (P) while supporting the support ring portion (Pa) of the preform (P) of the holder 200 Since the structure is installed in the upper opening 202, the heat transfer between the preform (P) and the holder 200 is blocked by the holder sleeve 400 of the insulating material, so that the neck of the preform (P) is fast and uniform without heat loss. It is heated to an appropriate temperature so as to crystallize satisfactorily, and the support ring portion Pa of the preform P is directly mounted on the holder sleeve 400 to be supported, thereby greatly simplifying the structure of the support mechanism.

Claims (4)

A base block 100 having a power transmission unit 110 and a holder connection unit 120; In the support mechanism for PET bottle preform having a holder 200 in the form of a circular tube fixed to the holder connecting portion 120 of the base block 100, Is installed in the upper opening 202 of the holder 200, the holder sleeve 400 of the insulating material to block the heat transfer between the holder 200 and the preform (P) while supporting the support ring portion (Pa) of the preform (P) PET bottle preform support mechanism, characterized in that the reinforcement. According to claim 1, The holder sleeve 400, the insertion portion 401 to be inserted into the upper end opening 202 of the holder 200, and the catch that the support ring portion (Pa) of the preform (P) is mounted and supported PET bottle preform support mechanism, characterized in that consisting of the jaw (420). The support mechanism for a PET bottle preform according to claim 1, wherein the holder sleeve (400) is made of PTFE (Poly Tetra Fluoro Ethylene) which is a fluorine resin. According to any one of claims 1 to 3, wherein the holder sleeve 400 is formed with a reinforcing member insertion hole 420a having an enlarged inner diameter, the support ring portion (Pa) of the preform (P) is mounted and supported The first insertion part 510 is provided at the upper end of the holder sleeve 400 to protrude toward the center of the inner diameter of the holder sleeve 400, while being inserted into and fixed to the upper opening 202 of the holder 200. And a second inserting portion 520 inserted into and fixed to the reinforcing member insertion hole 420a of the holder sleeve 400, the reinforcing member 500 having a tubular shape is provided with reinforcement, and the holder sleeve 400 is PET bottle preform support mechanism, characterized in that is inserted into the gap between the upper opening 202 of the holder 200 and the second insertion portion (520) of the reinforcing member (500).

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