CN212288667U - Double-ring plastic barrel blowing molding barrel top forming structure - Google Patents

Abstract

The utility model discloses a dicyclo plastic drum blowing is with bucket top shaping structure, including two gas blow pipes that set up on the frame of blowing machine and be located two respectively the half mould body of gas blow pipe both sides, be equipped with shaping half chamber on each half mould body respectively, be equipped with respectively on the matched surface of two half mould bodies with the bucket mouth shaping groove that the gas blow pipe corresponds, be equipped with annular cutting off step on the outer wall of gas blow pipe, be equipped with on the cell wall of bucket mouth shaping groove with the semi-ring cutting off step that annular cutting off step corresponds; and a blank avoiding groove is formed between the two barrel nozzle forming grooves on the joint surface of each half die body, and a material blocking bulge lower than the joint surface of the half die body is arranged at the bottom of the blank avoiding groove. The utility model discloses reduce shaping work load, reduced the molding material disappearance, do benefit to and guarantee finished product quality.

Description

Double-ring plastic barrel blowing molding barrel top forming structure

Technical Field

The utility model relates to a plastic drum blowing machinery technical field especially relates to a dicyclo plastic drum is bucket top forming structure for blowing.

Background

The double-ring plastic barrel is widely applied to storage and transportation of various liquids due to large storage capacity, stable physical and chemical properties and good stacking property. The top and bottom of the barrel are respectively formed with a snap ring for stacking, so the double-ring plastic barrel is called. Wherein, the top of the double-ring plastic barrel needs to be simultaneously formed with a barrel mouth.

Blow molding of present dicyclo plastic drum mostly sets up two gas blow pipes on the frame of blowing machine, sets up the bucket mouth shaping groove that corresponds with the gas blow pipe on two half die bodies of mould respectively. After the plastic pipe blank is downwards sleeved on the two air blowing pipes, the two air blowing pipes are driven to be away from each other, the lower end of the plastic pipe blank is tightly supported, then the two half die bodies are closed, barrel mouth forming grooves on the same sides of the two half die bodies and the corresponding air blowing pipes are extruded together, and a barrel mouth is formed. After the molding is finished, the two half mold bodies are opened and retracted, and the air blowing pipe is dropped and withdrawn.

The blow molding technology of the double-ring plastic barrel has some defects. Firstly, after the barrel mouth is formed, useless blanks are also obviously connected, and subsequent cutting is needed, so that the workload is increased; and the cutting is not easy to ensure the precision, and the use quality can be influenced. Secondly, when the two half die bodies are closed, part of the blank between the two air blowing pipes is extruded and separated during closing because the part of the blank does not participate in forming, and the extrusion and separation are mostly realized by arranging a blank avoiding groove on a joint surface between the two barrel nozzle forming grooves; however, when the blank is extruded and broken, the blank is usually not completely extruded and broken, the blank remains on the joint surface, and the joint surface at the blank avoiding groove cannot be completely closed due to the influence of flatness error of the joint surface, abrasion of the joint surface and the like; after the subsequent air supply of the air blowing pipe, the subsequent air supply is influenced by the pressure difference between the inside and the outside, the blank still keeps the fluidity and the like, and some tube blank materials in the die are easily extruded from the incompletely closed die joint surface, so that the loss of the section materials is caused, the structural strength of the double-ring plastic barrel top is reduced, and the quality of a finished product is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a reduce shaping work load is provided, reduces the shaping material and lacks, does benefit to the dicyclo plastic drum for the blowing bucket top shaping structure of guaranteeing finished product quality.

In order to solve the technical problem, the technical scheme of the utility model is that: the double-ring plastic barrel top forming structure for blow molding comprises two blowing pipes arranged on a base of a blow molding machine and half mold bodies respectively positioned on two sides of the two blowing pipes, wherein each half mold body is provided with a forming half cavity, the joint surfaces of the two half mold bodies are respectively provided with a barrel mouth forming groove corresponding to the blowing pipes, the outer wall of each blowing pipe is provided with an annular cutting step, and the wall of each barrel mouth forming groove is provided with a half ring cutting step corresponding to the annular cutting step; and a blank avoiding groove is formed between the two barrel nozzle forming grooves on the joint surface of each half die body, and a material blocking bulge lower than the joint surface of the half die body is arranged at the bottom of the blank avoiding groove.

According to a preferable technical scheme, blank avoiding grooves are respectively formed in the joint surfaces of the half die bodies and positioned on the outer sides of the two barrel nozzle forming grooves.

As a preferred technical scheme, the bottom of the blank avoiding groove is provided with a drainage groove which penetrates through the bottom surface of the half die body.

As a preferred technical scheme, the half mold body comprises a cylinder body forming part and a barrel top forming part vertically arranged at the bottom of the cylinder body forming part in a sliding manner, the barrel top forming part is provided with the barrel mouth forming groove, and a half mold opening and closing driver is arranged between the barrel top forming part and the cylinder body forming part; the barrel forming part is provided with a barrel top forming supporting groove which is arranged in a semi-annular shape, and the barrel top forming part is provided with a barrel top forming supporting bulge corresponding to the barrel top forming supporting groove.

By adopting the technical scheme, the double-ring plastic barrel top forming structure for blow molding comprises two air blowing pipes arranged on a base of a blow molding machine and half dies respectively positioned on two sides of the two air blowing pipes, wherein each half die is respectively provided with a forming half cavity, the joint surfaces of the two half dies are respectively provided with a barrel mouth forming groove corresponding to the air blowing pipes, the outer walls of the air blowing pipes are provided with annular cutting steps, and the wall of each barrel mouth forming groove is provided with a half ring cutting step corresponding to the annular cutting step; and a blank avoiding groove is formed between the two barrel nozzle forming grooves on the joint surface of each half die body, and a material blocking bulge lower than the joint surface of the half die body is arranged at the bottom of the blank avoiding groove. The utility model discloses two behind the half mould compound die, the semi-ring cut off the step with the step is cut off to the annular, can be right bucket mouth shaping groove with blank between the gas blow pipe is cuted, and bucket mouth department does not have unnecessary useless blank to exist after the shaping, reduces shaping work load. After the blank avoiding groove is arranged, the clamping surface between the groove wall of the blank avoiding groove and the forming semi-cavity and the barrel nozzle forming groove is narrowed, useless blanks between the two barrel nozzle forming grooves can be effectively extruded and separated under the clamping force, meanwhile, the material blocking bulge can effectively clamp the extruded and separated blanks, so that the blanks cannot flow out immediately, and the blanks in the forming semi-cavity form a certain blocking effect during blow molding, the outward extrusion of the blanks is reduced, and the loss of forming materials is reduced. The utility model discloses bucket mouth one shot forming, the precision is high, and the blowing process blank leaks and reduces, does benefit to and guarantees the finished product quality.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic structural view of an embodiment of the present invention, and the overall mold closing state is not shown in the figure;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic view of the structure B-B of FIG. 1;

fig. 4 shows the whole of fig. 1 after opening the mold.

In the figure: 1-a machine base; 11-a blowing feed seat; 12-a blowing pipe seat; 13-a blank supporting driving device; 2-an air blowing pipe; 21-annular cutting step; 3-half die body; 31-forming the half cavity; 32-a barrel forming part; 33-a drum top forming part; 34-half mold opening and closing actuator; 35-forming a supporting groove on the barrel top; 36-forming a supporting bulge on the barrel top; 37-land surface; 4-barrel mouth forming groove; 41-semi-ring cutting off steps; 5-blank avoiding groove; 51-a material blocking bulge; and 52-drainage grooves.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1 to 4, the dual-ring plastic barrel top molding structure for blow molding includes two blowing pipes 2 disposed on a base 1 of a blow molding machine, and half mold bodies 3 respectively disposed at two sides of the two blowing pipes 2, wherein each half mold body 3 is respectively provided with a molding half cavity 31, and a barrel mouth molding groove 4 corresponding to the blowing pipe 2 is respectively disposed on a mold matching surface 37 of the two half mold bodies 3. Certainly, the base 1 is provided with an air blowing feeding base 11 in a lifting manner, the air blowing feeding base 11 is provided with two air blowing pipe seats 12 in a transverse sliding manner, the two air blowing pipe seats 12 are respectively provided with the air blowing pipes 2, and a blank supporting driving device 13 is arranged between the two air blowing pipe seats 12 and the air blowing feeding base 11; a mold opening and closing driver is arranged between the two half mold bodies 3 and the machine base 1. The above-described structure is easily obtained by those skilled in the art from the description and the prior art, and will not be described herein.

In this embodiment, the outer wall of the blowing tube 2 is provided with an annular cutting step 21, and the wall of the barrel mouth forming groove 4 is provided with a half-ring cutting step 41 corresponding to the annular cutting step 21. After the two half die bodies 3 are integrally closed, the half-ring cutting step 41 and the annular cutting step 21 cut the blank between the barrel mouth forming groove 4 and the blowing pipe 2, useless blanks are directly cut off, useful blanks are reserved between the barrel mouth forming groove 4 and the blowing pipe 2, and the barrel mouth forming groove 4 is not easy to leak due to the combination and extrusion of cutting edges. Therefore, no redundant useless blank exists at the barrel mouth after forming, extra cutting is not needed, and the forming workload is reduced.

In this embodiment, a blank avoiding groove 5 is provided between the two barrel mouth molding grooves 4 on the mold clamping surface 37 of each half mold body 3, and a material blocking protrusion 51 lower than the mold clamping surface 37 of the half mold body 3 is provided on the bottom of the blank avoiding groove 5. After the blank avoiding groove 5 is arranged, a joint surface 37 between the groove wall of the blank avoiding groove 5 and the molding half cavity 31 and between the groove wall and the barrel mouth molding groove 4 is narrowed. Under the mold clamping force, useless blanks between the two barrel nozzle forming grooves 4 can be effectively extruded and separated. At the same time, the material blocking protrusion 51 can effectively clamp the extruded and separated blanks, so that the blanks cannot flow out immediately. The clamped parison forms a mass near the land 37 that acts as a barrier to the parison within the mold half 31 during blow molding, reducing its outward extrusion and thus reducing molding material loss.

The present embodiment shows that the material blocking protrusion 51 is arranged in a straight line shape and is close to the forming half cavity 31. In the present embodiment, blank avoiding grooves 5 are provided on the mold clamping surfaces 37 of the half mold body 3 on the outer sides of the two barrel mouth molding grooves 4, and here, the blank avoiding grooves 5 similarly avoid the useless blank which is crushed and separated by the mold clamping surfaces 37 at the barrel mouth molding grooves 4.

And a drainage groove 52 which penetrates through the bottom surface of the half die body 3 is formed at the bottom of the blank avoiding groove 5 and is used for quickly guiding out the half die body 3 by squeezing separated useless blanks.

Conventionally, the half mold body 3 comprises a cylinder forming part 32 and a barrel top forming part 33 vertically and slidably arranged at the bottom of the cylinder forming part 32, the barrel top forming part 33 is provided with the barrel mouth forming groove 4, and a half mold opening and closing driver 34 is arranged between the barrel top forming part 33 and the cylinder forming part 32. The barrel top forming part 33 is arranged to be openable, so that the die assembly of each half die body 3 can be facilitated, and the integral demolding after the forming can be facilitated. The structure and principle of the present invention are easily obtained by those skilled in the art from the description and the prior art, and are not described in detail herein.

In this embodiment, the barrel forming part 32 is provided with a barrel top forming supporting groove 35 in a semi-annular shape, and the barrel top forming part 33 is provided with a barrel top forming supporting protrusion 36 corresponding to the barrel top forming supporting groove 35. The barrel top forming part 33 is supported by the barrel top forming supporting groove 35, so that the die joint surfaces 37 on the two half die bodies 3 can be effectively attached when the two half die bodies 3 are integrally closed, and a better guarantee is provided for reducing the leakage of blanks.

In the embodiment, when the die is closed, useless blanks between the barrel nozzle and the two barrel nozzle forming grooves 4 are effectively cut off and separated, the workload of subsequent cutting and the like is reduced, and the barrel nozzle forming precision is high. By utilizing the support design of the material blocking bulge 51 and the barrel top forming part 33, the leakage of the blank can be reduced, and the quality of the finished product can be ensured.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. Dicyclo plastic drum blowing is with bucket top shaping structure, including two gas blow pipes of setting on the frame of blowing machine and be located two respectively the half mould body of gas blow pipe both sides, each be equipped with half chamber of shaping respectively on the half mould body, two be equipped with respectively on the compound die surface of half mould body with the bucket mouth shaping groove that the gas blow pipe corresponds, its characterized in that: an annular cutting step is arranged on the outer wall of the air blowing pipe, and a semi-ring cutting step corresponding to the annular cutting step is arranged on the wall of the barrel mouth forming groove; and a blank avoiding groove is formed between the two barrel nozzle forming grooves on the joint surface of each half die body, and a material blocking bulge lower than the joint surface of the half die body is arranged at the bottom of the blank avoiding groove.

2. The top molding structure for blow molding of double-ring plastic barrels as claimed in claim 1, wherein: and blank avoiding grooves are respectively arranged on the outer sides of the two barrel nozzle forming grooves on the die assembly surface of the half die body.

3. The top molding structure for blow molding of double-ring plastic barrels as claimed in claim 1, wherein: and a drainage groove which penetrates through the bottom surface of the half die body is formed at the bottom of the blank avoiding groove.

4. The top molding structure for blow molding of double-ring plastic barrels as claimed in claim 1, wherein: the half die body comprises a barrel body forming part and a barrel top forming part vertically arranged at the bottom of the barrel body forming part in a sliding mode, the barrel top forming part is provided with a barrel mouth forming groove, and a half die opening and closing driver is arranged between the barrel top forming part and the barrel body forming part; the barrel forming part is provided with a barrel top forming supporting groove which is arranged in a semi-annular shape, and the barrel top forming part is provided with a barrel top forming supporting bulge corresponding to the barrel top forming supporting groove.

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