CN110667084A - Blow molding mold for hollow product with internal sealing - Google Patents
Blow molding mold for hollow product with internal sealing Download PDFInfo
- Publication number
- CN110667084A CN110667084A CN201910971681.9A CN201910971681A CN110667084A CN 110667084 A CN110667084 A CN 110667084A CN 201910971681 A CN201910971681 A CN 201910971681A CN 110667084 A CN110667084 A CN 110667084A
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- Prior art keywords
- mold
- parting surface
- closed
- product
- die
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000071 blow moulding Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 title claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 3
- 238000010101 extrusion blow moulding Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/487105—Moulds characterised by the manufacturing process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of hollow extrusion blow molding dies, and discloses a blow molding die for a hollow product with an internal seal gas. The hollow product mold consists of two half molds, the left half mold is of an integral structure, the right half mold is of an integral embedded structure, the embedded part mainly forms an inner air sealing product, and the left half mold and the right half mold are provided with two parting surfaces. The method comprises the following steps of firstly, extruding and forming a pipe blank by an extruder, closing a mold by a first parting surface, inserting a blowing nozzle into the blowing nozzle and blowing compressed gas with certain pressure, so that the pipe blank is stressed and attached in an outer contour forming area of a left half mold and a right half mold, an embedded part of the right half mold is attached to a left mold plate, and an embedded block parting surface for forming internal seal gas and a left mold plate parting surface are quickly closed, so that a second parting surface is closed, the inner contour forming part is closed after the mold is closed, and the gas with certain pressure is closed in a forming cavity to form an internal seal gas.
Description
Technical Field
The invention belongs to the technical field of hollow extrusion blow molding dies, and discloses a blow molding die for a hollow product with an internal seal gas.
Background
Hollow blow molded articles are commonly used as plastic products, such as various mineral water bottles, peanut oil drums, lubricating oil drums and other packaging containers, daily necessities and children's toys. They share the common feature that the product has a hole left by the blow nozzle during blow molding.
A hollow blow molding process and a mold (patent number: CN104339626B) are mainly technically characterized in that: the head of the blow molding machine extrudes a hollow blank, the blank contains naturally entering gas (air), the blank is sent into a blow molding die, a pre-pressing die in the blow molding die is firstly closed, the blank with the gas inside is extruded, so that the gas enters a molding part, the closing is continued, the molding die in the blow molding die is closed, and the redundant part is cut off to form a closed hollow product.
As can be seen from the patent expression, the closed hollow product formed by the method is characterized in that: the gas in the blank is air, the pressure value is 1 atmosphere, namely 0.1MPa, the closed hollow part does not have gas with any pressure value and non-air gas, and meanwhile, the blow molding pressure of a general blow molding product is 10-30 MPa. Therefore, the forming pressure of the patent is used, although the pressure in the closed hollow cavity is increased due to the closing and extruding actions after the forming cavity is closed, the pressure still cannot reach the basic pressure of the formed hollow product, namely, when the hollow product with a complex shape is formed, the edge of the product still has insufficient pressure to enable the tube blank to be tightly attached to the inner wall of the mold and be shaped.
The gas in the hollow product with the internal seal gas is mainly gas except air which is required according to actual use conditions and has certain pressure value requirements.
Disclosure of Invention
The invention provides a blow molding die for an internal sealed air hollow product. The method mainly comprises the following steps:
the hollow product mold consists of two half molds, the forming area of the left half mold and the right half mold is divided into two parts, the outer contour part is mainly used for cutting off the extruded tube blank, the blowing nozzle is inserted from the upper hole for blowing air to form a closed shape with four closed surfaces, and the inner contour part is the area for forming the inner air-sealed product.
Furthermore, the left half-mould is of an integral structure, the right half-mould is of an integral embedded structure, and the embedded part mainly forms an inner air-sealing product.
Furthermore, the left half die and the right half die are both provided with two parting surfaces, the second parting surface is within the outline of the first parting surface, the first parting surface and the second parting surface of the right half die are consistent in height, the second parting surface of the left half die is lower than the first parting surface, and the thickness delta ranges from 0.01mm to 10 mm.
Further, the second parting surface mold closing time is completed within 0.1-3 seconds after the first parting surface mold closing.
Further, in the preferable multi-cavity production, a stock storage groove is arranged between the blank clamping ports of each cavity to store the excess blanks after the second parting surfaces are clamped.
Furthermore, the die material has good toughness and high-temperature fatigue resistance, and can bear the characteristics of temperature fusion and the like, such as SKD61 and the like.
Further, the mold closing process mainly comprises:
(1) and extruding the tube blank. Extruding the tube blank with a certain blow-up ratio by an extruder.
(2) And the first parting surface is formed by die assembly. The blowing nozzle is closed to insert, and compressed gas with certain pressure is blown into the blowing nozzle according to the actual working state, so that the tube blank is attached to the outer contour forming area of the mold.
(3) And (5) carrying out die assembly and molding on the second parting surface. And continuously blowing by the blowing nozzle, wherein the inner contour embedding part of the right half die moves within 0.1-3 seconds by a delta distance and is attached to the second parting surface of the left half die. The inner contour forming part forms a seal, and gas with certain pressure is sealed in the forming cavity to form an inner gas sealing product.
(4) And after the second parting surface is closed, blowing by the blowing nozzle is finished, and taking out the cooled product of the mold.
(5) For multi-cavity production, the entire article after removal is cut to form a single product.
Drawings
Fig. 1 is a schematic diagram of a first parting surface provided in an embodiment of the present invention after mold clamping.
In the figure: 1. a blowing nozzle; 2. an extruded tube blank; 3. and (5) closing the die to form the outer contour product.
Fig. 2 is a schematic structural diagram of a blow mold for an internally sealed hollow article according to an embodiment of the present invention.
In the figure: 4. forming an insert of an inner seal gas product; 5. and an oil cylinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the hollow product mold is composed of two half molds, the molding area of the left half mold and the right half mold is divided into two parts, the outer contour part mainly serves to cut off the extruded tube blank, the blowing nozzle is inserted from the upper hole to blow air to form a closed shape with four closed surfaces, and the inner contour part is an area for molding the inner air-tight product. The left half mold is of an integral structure, the right half mold is of an integral embedded structure, an embedded part mainly forms an inner air sealing product, and a parting surface (a second parting surface) of the embedded part is lower than the thickness delta of the first parting surface. The forming position of the inner contour is sealed after the second parting surfaces of the left half die and the right half die are closed, and gas with certain pressure is sealed in the forming cavity to form an inner gas-sealed product
The mold closing process mainly comprises:
(1) and extruding the tube blank. Extruding the tube blank with a certain blow-up ratio by an extruder.
(2) And the first parting surface is formed by die assembly. The blowing nozzle is closed to insert, and compressed gas with certain pressure is blown into the blowing nozzle according to the actual working state, so that the tube blank is attached to the outer contour forming area of the mold.
(3) And (5) carrying out die assembly and molding on the second parting surface. And continuously blowing by the blowing nozzle, wherein the inner contour embedding part of the right half die moves within 0.1-3 seconds by a delta distance and is attached to the second parting surface of the left half die. The inner contour forming part forms a seal, and gas with certain pressure is sealed in the forming cavity to form an inner gas sealing product.
(4) And after the second parting surface is closed, blowing by the blowing nozzle is finished, and taking out the cooled product of the mold.
(5) For multi-cavity production, the entire article after removal is cut to form a single product
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The blow molding mold for the hollow product with the inside sealed air is characterized in that the hollow product mold consists of two half molds, wherein the left half mold is of an integral structure, the right half mold is of an integral embedded structure, and the embedded part mainly forms the inside sealed air product.
2. The blow mold for an internally sealed hollow article according to claim 1, wherein the mold has two parting surfaces, the second parting surface is within the contour of the first parting surface, the first and second parting surfaces of the right half mold are uniform in height, the second parting surface of the left half mold is lower than the first parting surface, and the thickness δ ranges from 0.01mm to 10 mm.
3. The blow mold for an internally sealed hollow article according to claim 1, wherein the second parting surface is closed within 0.1 to 3 seconds after the first parting surface is closed.
4. The blow mold for air-tight hollow articles according to claim 1, wherein the whole molding process mainly comprises:
(1) extruding the tube blank, and extruding the tube blank with a certain blow-up ratio by an extruder.
(2) And (3) carrying out die assembly molding on the first parting surface, inserting a closed blowing nozzle of the die, and blowing compressed gas with certain pressure into the blowing nozzle according to the actual working state so as to attach the tube blank into the molding area of the outer contour of the die.
(3) And (3) carrying out die assembly and forming on the second section, continuously blowing air through the blowing nozzle, moving the inner contour embedding part of the right half die within a delta distance within 0.1-3 seconds, fitting the second section of the left half die and the second section of the right half die, sealing the forming part of the inner contour, and sealing gas with certain pressure in a forming cavity to form an inner gas sealing product.
(4) And after the second parting surface is closed, blowing by the blowing nozzle is finished, and taking out the cooled product of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971681.9A CN110667084A (en) | 2019-10-14 | 2019-10-14 | Blow molding mold for hollow product with internal sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910971681.9A CN110667084A (en) | 2019-10-14 | 2019-10-14 | Blow molding mold for hollow product with internal sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110667084A true CN110667084A (en) | 2020-01-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910971681.9A Pending CN110667084A (en) | 2019-10-14 | 2019-10-14 | Blow molding mold for hollow product with internal sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110667084A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111941887A (en) * | 2020-07-28 | 2020-11-17 | 广东隆源实业有限公司 | Manufacturing process of culture floater and culture floater obtained by process |
| CN113102549A (en) * | 2021-04-08 | 2021-07-13 | 江苏华阳管业股份有限公司 | Online detection system for high-pressure forming process in three-way pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1134158A (en) * | 1997-07-15 | 1999-02-09 | Inoac Corp | Molding method of hollow plastic molded article |
| JP2003181908A (en) * | 2001-12-14 | 2003-07-03 | Takagi Seiko Corp | Deep drawn blow-molded fuel tank, mold and molding method therefor |
| CN102962981A (en) * | 2012-08-31 | 2013-03-13 | 武汉亚普汽车塑料件有限公司 | Blow molding formation method of blow molding machine and blow molding die thereof |
| CN108000846A (en) * | 2017-12-15 | 2018-05-08 | 上海工程技术大学 | One kind contains internal enhancing structure flat-type extrusion blow product forming process |
-
2019
- 2019-10-14 CN CN201910971681.9A patent/CN110667084A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1134158A (en) * | 1997-07-15 | 1999-02-09 | Inoac Corp | Molding method of hollow plastic molded article |
| JP2003181908A (en) * | 2001-12-14 | 2003-07-03 | Takagi Seiko Corp | Deep drawn blow-molded fuel tank, mold and molding method therefor |
| CN102962981A (en) * | 2012-08-31 | 2013-03-13 | 武汉亚普汽车塑料件有限公司 | Blow molding formation method of blow molding machine and blow molding die thereof |
| CN108000846A (en) * | 2017-12-15 | 2018-05-08 | 上海工程技术大学 | One kind contains internal enhancing structure flat-type extrusion blow product forming process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111941887A (en) * | 2020-07-28 | 2020-11-17 | 广东隆源实业有限公司 | Manufacturing process of culture floater and culture floater obtained by process |
| CN113102549A (en) * | 2021-04-08 | 2021-07-13 | 江苏华阳管业股份有限公司 | Online detection system for high-pressure forming process in three-way pipe |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200110 |
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| RJ01 | Rejection of invention patent application after publication |