阅读说明：本技术 低损伤易脱模瓶胚 (Low-damage easy-demoulding bottle blank ) 是由 王增连 于 2020-06-28 设计创作，主要内容包括：本发明涉及一种低损伤易脱模瓶胚,包括：一体成型的胚口、胚颈、胚身和胚底,所述胚口的端部设有若干第一加强环,所述胚口的中部设有第二加强环,所述胚颈外壁向外侧倾斜,所述胚颈的内壁向内侧倾斜,胚身包括直线段和过渡段,所述过渡段的内壁呈弧形设置,所述胚底与所述过渡段通过圆弧过渡形式连接。由于设置第一加强环和第二加强环,在瓶胚出模的过程中,第一加强环和第二加强环可同时受力,增加了出模时的受力面,缩短了成型周期,使得瓶胚在未完全冷却的情况下便可顶出,提高了生产效率,减低了生产成本,同时由于增加了受力面,瓶胚在出模时更加稳定,降低了粘模的概率,能够有效地保护模具长时间运行,减少了瓶胚的损伤。(The invention relates to a low-damage easy-demoulding bottle blank, which comprises: integrated into one piece's embryo mouth, embryo neck, embryo body and embryo end, the tip of embryo mouth is equipped with a plurality of first beaded finish, the middle part of embryo mouth is equipped with the second beaded finish, embryo neck outer wall inclines to the outside, the inner wall of embryo neck inclines to the inboard, and the embryo body includes straightway and changeover portion, the inner wall of changeover portion is the arc setting, the embryo end with the changeover portion passes through circular arc transition form and connects. Because set up first beaded finish and second beaded finish, at the in-process of bottle embryo demolding, but first beaded finish and second beaded finish atress simultaneously, the stress surface when having increased the demolding has shortened the shaping cycle, make the bottle embryo under the complete refrigerated condition alright ejecting not, the production efficiency is improved, the production cost is reduced, simultaneously because increased the stress surface, the bottle embryo is more stable when the demolding, the probability of gluing is reduced, can protect the long-time operation of mould effectively, the damage of bottle embryo has been reduced.)

1. A low damage easy demoulding bottle blank is characterized by comprising: integrated into one piece's embryo mouth, embryo neck, embryo body and embryo end, the tip of embryo mouth is equipped with a plurality of first beaded finish, the middle part of embryo mouth is equipped with the second beaded finish, embryo neck outer wall inclines to the outside, the inner wall of embryo neck inclines to the inboard, the embryo body includes straightway and changeover portion, the outer wall of changeover portion including inside sunken arc transition face and with the transition conical surface that the arc transition face is connected, the inner wall of changeover portion is the arc setting, the embryo end with the changeover portion passes through the circular arc transition form and connects.

2. The low damage easy release bottle preform of claim 1, wherein a plurality of secondary positioning rings are further disposed between said first reinforcing ring and said second reinforcing ring.

3. The low damage easy release bottle embryo of claim 2, wherein a plurality of said secondary positioning rings are evenly distributed.

4. The low damage easy-to-demold bottle blank of claim 1, wherein the ratio of the wall thickness of said straight segment to the wall thickness of said blank bottom is 1.15-1.3: 1.

5. The low damage easy-release bottle preform of claim 1, wherein the transition section occupies 1/10-3/20 of the height of the bottle preform.

6. The low damage easy-release bottle blank as defined in claim 1, wherein the ratio of the arc length of said arc transition surface to the length of said transition conical surface is 1.2-1.5: 1.

7. The low damage easy release bottle embryo as claimed in claim 1 or 6, wherein the outer wall of the embryo neck is inclined outwardly at an angle of 1-1.5 ° and the inner wall of the embryo neck is inclined inwardly at an angle of 1-2 °.

8. The low damage easy-to-demould bottle blank as claimed in claim 1, wherein the blank bottom is conical, and the top of the blank bottom is arc-shaped.

Technical Field

The invention relates to the technical field of plastic bottles, in particular to a low-damage easy-demoulding bottle blank.

Background

The plastic bottle is produced through injection molding in an injection molding machine and blow molding in a bottle blowing machine before the bottle blank is hardened. The general bottle embryo is in the shape of a test tube and consists of an embryo opening, an embryo neck, an embryo body and an embryo bottom, wherein the embryo opening and the embryo neck are not moved in the blow molding process, the embryo body and the embryo bottom are expanded and thinned under the action of internal air pressure, and the outer side surface of the embryo body is molded in a mold of a plastic bottle.

However, the thickness of the neck part of the bottle blank is smaller than that of the bottom part of the bottle blank, the neck part of the bottle blank is arranged in a straight line and smoothly with the inner side wall of the bottle blank, and the outer side surface of the bottle blank is in a slope or arc surface shape, so that the diameter of the neck part of the bottle blank is smaller than that of the mouth and the body of the bottle blank, and when the bottle blank is demolded, the outer side wall of the neck part of the bottle blank is rubbed with a mold, so that the outer side wall of the bottle blank is scratched or damaged, and the appearance and the quality of a.

Disclosure of Invention

In order to solve the technical problems, the invention provides a low-damage easy-demoulding bottle blank which has the advantages of convenience in demoulding and low damage.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a low damage easy release bottle preform comprising: integrated into one piece's embryo mouth, embryo neck, embryo body and embryo end, the tip of embryo mouth is equipped with a plurality of first beaded finish, the middle part of embryo mouth is equipped with the second beaded finish, embryo neck outer wall inclines to the outside, the inner wall of embryo neck inclines to the inboard, the embryo body includes straightway and changeover portion, the outer wall of changeover portion including inside sunken arc transition face and with the transition conical surface that the arc transition face is connected, the inner wall of changeover portion is the arc setting, the embryo end with the changeover portion passes through the circular arc transition form and connects.

According to the technical scheme, the first reinforcing ring and the second reinforcing ring are arranged, so that the first reinforcing ring and the second reinforcing ring can be stressed simultaneously in the mold stripping process of the bottle blank, the stress surface in the mold stripping process is increased, the molding period is shortened, the bottle blank can be ejected under the condition of incomplete cooling, the production efficiency is improved, the production cost is reduced, meanwhile, due to the fact that the stress surface is increased, the bottle blank is more stable in the mold stripping process, the mold sticking probability is reduced, the mold can be effectively protected from long-time operation, and the damage to the bottle blank is reduced; because the inner wall of the preform neck is inwards sunken, the diameter of the inner wall of the preform neck is larger than that of the inner wall of the preform body, the damage caused in the demolding process of the preform is reduced, the finished product qualification rate of the plastic bottle after blow molding is improved, in the blow molding process, the heating temperature is higher at the position which is closer to the heating lamp tube under the same wall thickness, the material at the position where the temperature of the preform is lower during blow molding is not easy to stretch, the thickness of the transition section and the preform bottom is smaller than the thickness of a straight line through the arrangement of the transition section and the preform bottom, the temperature and the thickness of the preform body and the preform bottom can form reasonable distribution during heating, and the mechanical properties of the preform, such as compression resistance, pressure resistance and the like, are ensured.

As a preferable scheme of the present invention, a plurality of auxiliary positioning rings are further disposed between the first reinforcing ring and the second reinforcing ring.

As a preferable scheme of the invention, a plurality of the auxiliary positioning rings are uniformly distributed.

Realize above-mentioned technical scheme, through the assistance-localization real-time ring in the bottle embryo drawing of patterns together play fixed and the effect of strengthening with first beaded finish and second beaded finish for the drawing of patterns process is more stable.

In a preferred embodiment of the present invention, the ratio of the wall thickness of the straight line segment to the wall thickness of the embryo bottom is 1.15-1.3: 1.

As a preferable scheme of the invention, the transition section accounts for 1/10-3/20 of the height of the bottle blank.

As a preferable mode of the present invention, a ratio of the arc length of the arc transition surface to the length of the transition conical surface is 1.2-1.5: 1.

As a preferable scheme of the present invention, the outer wall of the embryonic neck is inclined outwardly at an angle of 1 to 1.5 °, and the inner wall of the embryonic neck is inclined inwardly at an angle of 1 to 2 °.

As a preferable aspect of the present invention, the embryonic bottom is conical, and the top of the embryonic bottom is circular arc-shaped.

By adopting the technical scheme, the thickness of the embryonic bottom can be changed more uniformly, the occurrence of the phenomenon of material accumulation of the embryonic bottom is reduced, and the processing cost is reduced.

In conclusion, the invention has the following beneficial effects:

the embodiment of the invention provides a low-damage easy-demoulding bottle blank, which comprises: integrated into one piece's embryo mouth, embryo neck, embryo body and embryo end, the tip of embryo mouth is equipped with a plurality of first beaded finish, the middle part of embryo mouth is equipped with the second beaded finish, embryo neck outer wall inclines to the outside, the inner wall of embryo neck inclines to the inboard, the embryo body includes straightway and changeover portion, the outer wall of changeover portion including inside sunken arc transition face and with the transition conical surface that the arc transition face is connected, the inner wall of changeover portion is the arc setting, the embryo end with the changeover portion passes through the circular arc transition form and connects. Because the first reinforcing ring and the second reinforcing ring are arranged, the first reinforcing ring and the second reinforcing ring can be stressed simultaneously in the mold stripping process of the bottle blank, the stress surface during mold stripping is increased, the molding period is shortened, the bottle blank can be ejected out under the condition of incomplete cooling, the production efficiency is improved, the production cost is reduced, meanwhile, because the stress surface is increased, the bottle blank is more stable during mold stripping, the probability of mold sticking is reduced, the long-time operation of the mold can be effectively protected, and the damage of the bottle blank is reduced; because the inner wall of the preform neck is inwards sunken, the diameter of the inner wall of the preform neck is larger than that of the inner wall of the preform body, the damage caused in the demolding process of the preform is reduced, the finished product qualification rate of the plastic bottle after blow molding is improved, in the blow molding process, the heating temperature is higher at the position which is closer to the heating lamp tube under the same wall thickness, the material at the position where the temperature of the preform is lower during blow molding is not easy to stretch, the thickness of the transition section and the preform bottom is smaller than the thickness of a straight line through the arrangement of the transition section and the preform bottom, the temperature and the thickness of the preform body and the preform bottom can form reasonable distribution during heating, and the mechanical properties of the preform, such as compression resistance, pressure resistance and the like, are ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

The corresponding part names indicated by the numbers and letters in the drawings:

1. a blank opening; 11. a first reinforcement ring; 12. a second reinforcement ring; 13. an auxiliary positioning ring; 2. a germ neck; 3. a blank body; 31. a straight line segment; 32. a transition section; 321. an arc transition surface; 322. a transition conical sheet; 4. and (5) embryonic bottom.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.