CN218803938U

CN218803938U - Blow molding mold with bottom exhaust structure

Info

Publication number: CN218803938U
Application number: CN202223220086.8U
Authority: CN
Inventors: 谢国基; 姜晓平; 董书生; 梁炎均; 陈昌雄; 卢佳; 杨建茁
Original assignee: GDXL Precise Machinery Co Ltd
Current assignee: GDXL Precise Machinery Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-07
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a take blow forming die of bottom exhaust structure, including die cavity structure and die block, the die cavity structure with the die block constitutes the die cavity of injecing the container through the configuration, the die cavity is including injecing the inner wall of container subject, the interior die surface and the outer die surface of injecing the container bottom jointly, outer die surface is including consecutive and be used for the die cavity die surface of injecing some container bottom surfaces, the footing shaping position that is used for injecing the container footing and the bottom edge die surface that is used for injecing container bottom edge portion, be equipped with between interior die surface and the outer die surface and communicate directly or indirectly the exhaust structure to external with the die cavity space. The utility model discloses be equipped with in blow forming die's bottom and communicate the die cavity space directly or indirectly to external exhaust structure, can exhaust to the die cavity bottom at the in-process of blowing container bottle, optimized exhaust effect, container bottom shaping when doing benefit to low pressure bottle blowing makes the container bottom shaping fuller.

Description

Blow molding mold with bottom exhaust structure

Technical Field

The utility model relates to a bottle blowing mould technical field, concretely relates to take blowing forming die of bottom exhaust structure.

Background

In the prior art, a container is formed by blowing a container blank in a bottle blowing mold, the bottle blowing mold generally comprises a left half mold, a right half mold matched with the left half mold, and a bottom mold matched with the bottom of the left half mold and the bottom of the right half mold, a cavity is formed among the left half mold, the right half mold and the bottom mold, and the container blank expands in the cavity until the container blank is attached to the inner wall of the cavity, so that the container is formed. The specific structure can refer to the patent application number 202122664676.9, the patent name is a bottom die cooling water channel structure, the bottom die and the Chinese utility model patent document of the bottle blowing die.

Referring to fig. 1, the conventional partial container includes a container main body 01, a container bottom 02, and a container bottom 03 disposed between the container main body 01 and the container bottom 02, wherein a bottom recess is formed in a middle portion of the container bottom 02, and a bottom rim portion is formed between the container bottom 02 and the container bottom 03. If adopt current die cavity structure to carry out the bottle blowing to this container base, because the footing shaping position of injecing the footing in the die cavity structure, the bottom die surface of injecing the bottom surface, the sunken shaping surface of injecing the bottom all does not set up corresponding exhaust structure, consequently need use higher bottle blowing pressure, just can guarantee that each position shaping of container bottom is plump, it is great to the consumption of high-pressure gas, in case bottle blowing pressure descends, can cause some position shaping in container bottom not plump, influence finished product quality, be unfavorable for the enterprise to improve product quality, energy saving and emission reduction and high-efficient production.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the blow molding die with the bottom exhaust structure is provided, and the gas at the bottom in the die cavity can be rapidly exhausted, so that the bottom of the container is easier to mold.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a take blow forming die of bottom exhaust structure, includes die cavity structure and die block, die cavity structure with the die block constitutes the die cavity of injecing the container through the configuration, the die cavity is including injecing the inner wall of container main part, the interior die surface and the outer die surface of injecing the container bottom jointly, the outer die surface is including the die cavity die surface that links to each other in proper order and be used for injecing partial container bottom surface, the footing shaping position that is used for injecing the container footing and the bottom edge die surface that is used for injecing container bottom edge portion, be equipped with between interior die surface and the outer die surface and communicate directly or indirectly the die cavity space to external exhaust structure.

In the present invention, the mold cavity structure comprises two mold cavity half-molds, the mold cavity half-molds having a half-mold cavity and a half-mold mounting location; the bottom die comprises a die bottom and a bottom die forming part arranged on the die bottom; the half die mounting positions are configured to accommodate the die bottom, and the two half die cavities and the bottom die forming part form the die cavity.

The utility model discloses in, inner wall and external mold system face are located half model chamber, are equipped with the semicircle orifice between half module installation position and the external mold system face, the semicircle orifice has the pore wall, the internal mold system face is located die block shaping portion, be equipped with between the mould end and the internal mold system face global, exhaust structure sets up between pore wall and global, exhaust structure includes pore wall and global fit clearance between.

The utility model discloses in, exhaust structure still includes the die cavity ring channel, the die cavity ring channel encircles the edge of external mold system face.

The utility model discloses in, exhaust structure is still including being located the die cavity air discharge duct on the pore wall, and the die cavity air discharge duct extends to the half module installation position from the external mold system face.

The utility model discloses in, the inner wall is located the semi-model intracavity, interior module face and external mold face are located die block shaping portion, exhaust structure is including setting up the die block ring channel between interior module face and external mold face, be equipped with in the die block ring channel and communicate to external first exhaust hole.

The utility model discloses in, interior die surface is located the radial inside of external die surface, is equipped with the die block air discharge duct at the radial distal end of external die surface, be equipped with in the die block air discharge duct and communicate to external second exhaust hole.

The utility model discloses in, the die block air discharge duct is located footing shaping position and/or die block system face and footing shaping position between.

The utility model discloses in, the die block air discharge duct is equipped with two at least.

The utility model discloses in, the interior molding face includes the week along the face and is located protruding position and sunken position on the week along the face, sets up the air guide groove at the protruding position of part at least and/or sunken position and week along surface contact part, the air guide groove communicates to exhaust structure through gathering the gas groove.

The utility model has the advantages that: the utility model discloses be equipped with in blow forming die's bottom and communicate the die cavity space directly or indirectly to external exhaust structure, can exhaust to the die cavity bottom at the in-process of blowing container bottle, optimized exhaust effect, container bottom shaping when doing benefit to low pressure bottle blowing makes the container bottom shaping fuller. The utility model discloses an exhaust structure mainly sets up between centre die-making face and external mold die-making face, is located the minimum of die cavity, can reach better exhaust effect with the whole discharges of air of die cavity bottom as far as possible. Simultaneously, still be equipped with the air guide groove at the protruding position of centre die-making face and sunken position periphery, set up the die block air discharge duct between die block face and footing shaping position, can discharge the air that the container bottom corresponds the position fast through a plurality of corresponding air grooves, air resistance when reducing container bottom inflation shaping does benefit to low pressure bottle blowing container bottom shaping, can realize simultaneously that the container bottom uses the raw materials of less thickness can the cover shaping, does benefit to container bottom lightweight.

Drawings

The invention will be further explained with reference to the drawings and the embodiments below:

FIG. 1 is a schematic view of a container;

FIG. 2 is a schematic structural diagram according to the first embodiment;

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

FIG. 4 is a schematic view of a bottom mold according to the first embodiment;

FIG. 5 is a schematic structural diagram according to a second embodiment;

FIG. 6 is a schematic view of a bottom mold structure according to the second embodiment;

fig. 7 is an enlarged view of a portion B of fig. 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 2 to 4, the present embodiment discloses a blow molding mold with a bottom vent structure, the mold cavity structure 10 and the bottom mold 20 are configured to form a cavity defining a container, the mold cavity structure 10 includes two mold cavity halves 11, the mold cavity halves 11 have a half mold cavity 12 and a half mold mounting location 13; the bottom die 20 comprises a die bottom 21 connected with the half die mounting position 13 and a bottom die forming part arranged on the die bottom 21, the two half die cavities 12 and the bottom die forming part form a die cavity, the die cavity comprises an inner wall 121 defining the container body 01, an inner die surface 22 and an outer die surface 24 defining the bottom, and the inner wall 121, the outer die surface 24 and the inner die surface 22 define the container shape together.

The outer mould surface 24 comprises a bottom mould surface 241 for defining a part of the bottom surface 02 of the container, a foot forming station 242 for defining the container foot 03 and a bottom rim mould surface 243 for defining a bottom rim portion, which are connected in series, the bottom surface 02 of the container being defined by the bottom mould surface 241 and the inner mould surface 22. The bottom molding surface 241 in this embodiment is approximately parallel to the placement surface, and may be a plane or a curved surface inclined toward or away from the placement surface. The above structure is basically the same as the patent solution of the applicant's earlier application, and is not described in detail herein. An exhaust structure is provided between the inner molding surface 22 and the outer molding surface 24 to communicate the cavity space directly or indirectly to the outside.

In this embodiment, the inner wall 121 and the outer molding surface 24 are located on the semi-molding cavity 12, a semicircular hole 16 is arranged between the half-molding installation position 13 and the outer molding surface 24, the semicircular hole 16 has a hole wall 161, the inner molding surface 22 is located on the bottom mold molding portion, a peripheral surface 211 is arranged between the mold bottom 21 and the inner molding surface 22, an exhaust structure is arranged between the hole wall 161 and the peripheral surface 211, the exhaust structure includes a fit clearance 3 between the hole wall 161 and the peripheral surface 211, the fit clearance 3 is from a clearance between the bottom mold 20 and the mold cavity structure 10, and the width of the fit clearance is 0.2-0.7mm. In order to improve the exhaust efficiency of the fit clearance, the exhaust structure further comprises a die cavity annular groove 18, the die cavity annular groove 18 surrounds the edge of the outer die surface 24, the die cavity annular groove 18 is a gap between the hole wall 161 and the bottom die surface 241, the concave depth of the gap is 0.5-1mm, the width of the gap is 0.1-1.2mm, and the excessive deep depression and the excessive wide width are avoided as much as possible, so that the influence on the forming of the container main body is reduced; in practice, the depth and width of the cavity vent groove 17 are the same as the width of the notch, and since the cavity vent groove 17 is located at the bottom of the annular groove 25, the width of the cavity vent groove 17 can be increased as appropriate, preferably 6 times or less the width of the notch. The hole wall 161 is provided with a plurality of cavity vent grooves 17 at intervals, and the cavity vent grooves 17 extend from the outer molding surface 24 to the half mold mounting positions 13 and are communicated with the cavity annular grooves 18. The cavity vent grooves 17 and the peripheral surface 211 form vent channels therebetween through which gas entering the cavity annular grooves 18 is exhausted. The annular groove 18 is preferably located at the lowest point in the cavity to allow air entering the bottom region of the cavity to be quickly exhausted, thereby achieving a better air exhaust effect.

In the present embodiment, the cavity air vent grooves 17 and the cavity annular grooves 18 are located on the side of the semicircular hole 16, and in practice, the cavity air vent grooves 17 and the annular grooves 25 may be provided on the peripheral surface 211. In practice, a gap is provided between the mold bottom 11 and the mold half mounting position 13, the fitting gap 3 and the cavity vent groove 17 are directly or indirectly communicated with the outside through the gap, and gas exhausted from the fitting gap 3 and the cavity vent groove 17 is exhausted through the gap. The optimization of the exhaust function can be realized by slightly changing the whole die in the embodiment, the old die is convenient to upgrade and process, and the popularization is facilitated.

In a preferred embodiment, the inner molding surface 22 includes a peripheral surface 221 and a raised position and a recessed position on the peripheral surface 221, and the raised position and the recessed position are used for defining a recessed position of the container bottom. The air guide groove 23 is arranged at the contact part of part or all of the convex position and/or the concave position and the peripheral surface 221, and the air guide groove 23 surrounds the outer periphery of the convex position and/or the concave position and is communicated to the annular groove 18 of the die cavity through the air collecting groove 231; the width of the air guide groove 23 is less than or equal to the width of the air collection groove 231, and the depth of the air guide groove 23 is the same as the depth of the air collection groove 231, preferably, the width of the air guide groove 23 is 0.25-0.75 of the width of the air collection groove 231, or the area of the exhaust surface of the air guide groove 23 is 0.25-0.75 of the area of the exhaust surface of the air collection groove 231, and the concave depth of the air collection groove 231 is 0.5-1mm, and the width is 0.5-1.5mm. The air exhaust speed of the corresponding position of the bottom recess can be accelerated through the air guide groove 23, so that the bottom recess is molded more fully.

Example two:

referring to fig. 5 to 7, the structure and principle of the present embodiment are substantially the same as those of the first embodiment, and the difference is that: the container bottom surface 02, the container bottom foot 03, the bottom recess and the bottom rim are formed by associated structures in the bottom mold 20. In this embodiment, the inner wall 121 is located in the semi-mold cavity 12, the inner mold surface 22 and the outer mold surface 24 are located on the bottom mold forming portion, the exhaust structure includes a bottom mold annular groove 25 disposed between the inner mold surface 22 and the outer mold surface 24, a first exhaust hole 251 communicated to the outside is disposed in the bottom mold annular groove 25, and the first exhaust hole 251 is disposed in a plurality and uniformly spaced around the axis of the cavity. The first vent hole 251 penetrates through the bottom mold 20 in a manner parallel to and inclined from the axial direction of the cavity and communicates with the outside, or penetrates through the bottom mold 20 in a multi-path manner with a plurality of angles and communicates with the outside, and the gas entering the annular groove 25 of the bottom mold is discharged through the first vent hole 251. During manufacturing, the bottom mold 20 may be manufactured by additive machining such as 3D printing, or by a combination of additive machining and subtractive machining.

In a preferred embodiment, the inner molding surface 22 is located radially inside the outer molding surface 24, a bottom mold exhaust groove 26 is provided at a radially distal end of the outer molding surface 24, a second exhaust hole 261 communicated with the outside is provided in the bottom mold exhaust groove 26, the second exhaust hole 261 is provided in a plurality and is uniformly spaced around the axis of the mold cavity, and the second exhaust hole 261 is directly or indirectly communicated with the outside after penetrating through the mold cavity structure 10. The preferable position of the bottom die exhaust groove 26 is between the bottom die surface 241 and the bottom foot forming position 242; in other embodiments, the gas pressure in the region where the foot forming station 242 and/or the bottom molding surface are located may be reduced, so that the gas in other regions can be rapidly introduced into the region and then exhausted; when the second vent hole 261 is provided, a direction parallel/perpendicular/angled to the cavity axis may be selected according to the position of the second vent hole 261. Air entering the bottom concave area can be quickly guided into the bottom die annular groove 25 through the air guide groove 23, air entering the container bottom surface 02 area can be quickly discharged through the annular groove 25, air corresponding to the container bottom feet 03 can be quickly discharged through the bottom die exhaust groove 26, so that quick discharge of air corresponding to the bottom of the whole container bottle is realized, air resistance during expansion forming of the bottom of the container is reduced, forming of the bottom of the container is facilitated when low-pressure bottle blowing is performed, and forming of the bottom of the container is enabled to be fuller. At least two bottom die exhaust grooves 26 are arranged to increase exhaust displacement. In this embodiment, the bottom mold annular groove 25 and the bottom mold vent groove 26 have a concave depth of 0.5 to 1mm and a width of 0.5 to 1.5mm, and the diameters of the first vent hole 251 and the second vent hole 261 correspond to the widths of the bottom mold annular groove 25 and the bottom mold vent groove 26.

The above only is the preferred embodiment of the present invention, as long as the technical solution of the purpose of the present invention is realized by basically the same means, all belong to the protection scope of the present invention.

Claims

1. The utility model provides a take blow forming die of bottom exhaust structure, includes die cavity structure and die block, the die cavity structure with the die block constitutes the die cavity of injecing the container through the configuration, its characterized in that: the cavity comprises an inner wall limiting the container body, an inner molding surface and an outer molding surface jointly limiting the bottom of the container, the outer molding surface comprises a bottom molding surface, a bottom foot molding position and a bottom edge molding surface, the bottom molding surface is sequentially connected and used for limiting part of the bottom of the container, the bottom foot molding position is used for limiting the bottom foot of the container, the bottom edge molding surface is used for limiting the bottom edge of the container, and an exhaust structure which directly or indirectly communicates the cavity space to the outside is arranged between the inner molding surface and the outer molding surface.

2. A blow mold with a bottom vent structure as in claim 1, wherein: the mold cavity structure comprises two mold cavity half-molds, and each mold cavity half-mold is provided with a half-mold cavity and a half-mold mounting position; the bottom die comprises a die bottom and a bottom die forming part arranged on the die bottom; the half die mounting positions are configured to accommodate the die bottom, and the two half die cavities and the bottom die forming part form the die cavity.

3. A blow mold with a bottom vent structure as in claim 2, wherein: inner wall and external mold face are located half model chamber, are equipped with the semicircle orifice between half module installation position and the external mold face, the semicircle orifice has the pore wall, the internal mold face is located die block shaping portion, be equipped with global at the bottom of the mould between with the internal mold face, exhaust structure sets up between pore wall and global, exhaust structure includes pore wall and global fit clearance between.

4. A blow mold with a bottom vent structure as in claim 3, wherein: the exhaust structure also comprises a die cavity annular groove which surrounds the edge of the outer die surface.

5. A blow forming mold with a bottom vent structure according to claim 3 or 4, wherein: the exhaust structure also comprises a mold cavity exhaust groove positioned on the hole wall, and the mold cavity exhaust groove extends from the outer mold surface to the half mold mounting position.

6. A blow mold with a bottom vent structure as in claim 2, wherein: the inner wall is located the half-mould intracavity, interior die surface and external die surface are located die block shaping portion, exhaust structure is including setting up the die block ring channel between interior die surface and external die surface, be equipped with the first exhaust hole that communicates to external in the die block ring channel.

7. A blow mold with a bottom vent structure as in claim 1, wherein: the inner molding surface is located in the radial inner portion of the outer molding surface, a bottom mold exhaust groove is formed in the radial far end of the outer molding surface, and a second exhaust hole communicated to the outside is formed in the bottom mold exhaust groove.

8. A blow mold with a bottom vent structure as in claim 7, wherein: the bottom die exhaust groove is positioned between the bottom die forming position and/or the bottom die forming surface and the bottom die forming position.

9. A blow mold with a bottom vent structure as in claim 7, wherein: at least two bottom die exhaust grooves are formed.

10. A blow mold with a bottom vent structure according to any one of claims 4 or 6-9, wherein: the inner molding surface comprises a peripheral surface, and a convex position and a concave position which are positioned on the peripheral surface, wherein an air guide groove is arranged at the contact part of at least part of the convex position and/or the concave position and the peripheral surface, and the air guide groove is communicated to an exhaust structure through an air collection groove.