CN108357077B - Machining process of die cavity bottom die - Google Patents
Machining process of die cavity bottom die Download PDFInfo
- Publication number
- CN108357077B CN108357077B CN201810327680.6A CN201810327680A CN108357077B CN 108357077 B CN108357077 B CN 108357077B CN 201810327680 A CN201810327680 A CN 201810327680A CN 108357077 B CN108357077 B CN 108357077B
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- bottom die
- die cavity
- turning
- milling
- die
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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
- B29C49/4823—Moulds with incorporated heating or cooling means
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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
- B29C49/4823—Moulds with incorporated heating or cooling means
- B29C2049/4825—Moulds with incorporated heating or cooling means for cooling moulds or mould parts
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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
- B29C49/487105—Moulds characterised by the manufacturing process
Abstract
The invention discloses a processing technology of a die cavity die block, which comprises a columnar die block main body, wherein a single-layer die cavity and a multi-layer die cavity are respectively arranged at the left side and the right side of the die block main body, and the opening directions of the single-layer die cavity and the multi-layer die cavity are opposite; the cooling hole is connected with the connecting hole, the connecting hole is provided with the concave position, and the annular connecting groove is arranged at the radial extension position of the single-layer bottom die cavity of the bottom die main body, so that the cooling device has the advantages of reasonable structure, stable assembly and the like; in order to prevent the bar clamping from being influenced by the inner diameter of the main shaft, the process scheme adopts a processing method of 'two pieces in one piece', uses a round bar to process two workpieces simultaneously, saves raw materials and saves a large amount of processing time.
Description
Technical Field
The invention relates to a bottle blowing die, in particular to a processing technology of a die cavity bottom die.
Background
In the manufacturing process of the PET mould, the mould cavity bottom mould is required to be arranged at the lower part of the mould cavity of the PET mould to be matched with the bottle cavity, and the quality of the PET container (such as a cola bottle) can be influenced due to the matched effect of the bottom mould and the mould cavity, so that manufacturers continuously improve the structure of the bottom mould, and the structure of the PET mould is more reasonable, the cooling effect is better and the assembly is more stable.
Meanwhile, the industry generally puts high demands on the machining precision of the die cavity bottom die of the PET die. In order to ensure the machining precision of the die cavity bottom die, the prior art adopts a turning and milling composite machining center and combines a form of 'one bar with multiple pieces'. The method combines a plurality of working procedures, reduces working procedure steps and sequence-switching waiting time, and improves production efficiency; the whole processing technology is completed by one-time clamping, so that the position error caused by multiple times of clamping is eliminated; the chuck clamps the next workpiece, and only one section of clamping waste is generated in one bar, so that the waste of materials is reduced.
However, the method has certain limitation that the diameter of a long bar is limited by the inner diameter of a main shaft, the diameter of a bottom die of a PET die cavity has the characteristics of larger variation range but most medium diameter, and a medium-diameter machine tool is adopted, so that a method of 'one bar with multiple pieces' is utilized, a few large-diameter die cavities cannot be processed, the processing procedures of the traditional method are more, and the precision is difficult to ensure; the large-diameter machine tool is adopted, so that the equipment cost is seriously increased, and the waste of resources is also caused.
In order to reduce the equipment cost and get rid of the limit of the inner diameter of the main shaft on the diameter of the bar, the applicant has designed the die cavity bottom die and the processing technology thereof positively and beneficially.
Disclosure of Invention
The die cavity bottom die structure with reasonable structure, stable assembly and good cooling effect and the die cavity bottom die processing technology with convenient and quick processing, low cost and no limit of the inner diameter of the main shaft on the diameter of the bar are provided.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a die cavity die block structure, includes columnar die block main part, die block main part left and right sides is equipped with die cavity and the die cavity at the bottom of the individual layer respectively at the bottom of die cavity and the die cavity at the bottom of the multilayer, the die cavity at the bottom of the individual layer communicates with each other at central point department and has a gas blowing hole at the bottom of die cavity at the bottom of the multilayer, a plurality of cooling holes have been seted up to the radial extension department that die block main part is located the gas blowing hole, be equipped with the connecting hole of a plurality of cooling holes of intercommunication in the die block main part, the periphery of connecting hole is equipped with concave position, the die block main part is located the radial extension department of individual layer die cavity and is equipped with annular spread groove.
In the invention, the number of the cooling holes is six, two adjacent cooling holes are mutually intersected to form a cross channel, and the end parts of the two adjacent cross channels are mutually communicated.
In the present invention, the connection holes communicate with the ends of two of the intersecting channels.
In the invention, a plurality of positioning grooves are arranged on the cylindrical surface of the bottom die main body.
In the invention, the diameter of the columnar bottom die main body is larger than 50mm.
The processing technology of the die cavity bottom die is characterized by comprising the following steps of:
step one: preparing cylindrical processing blank with diameter larger than 55mm, preparing turning and milling compound machine tool with main shaft diameter smaller than 52mm,
step two: clamping the left side of the blank on a left clamp of a turning and milling composite machine tool, machining the right side of the blank by the turning and milling composite machine tool, and turning and milling a right die cavity bottom die structure on the right side of the blank;
step three: clamping the right side of the blank on a right clamp of a turning and milling composite machine tool, loosening a left clamp of the turning and milling composite machine tool, machining the left side of the blank by the turning and milling composite machine tool, and turning and milling the left side of the blank to form a left die cavity bottom die structure, wherein the left die cavity bottom die structure is connected with the right die cavity bottom die structure through a connecting column, and the left die cavity bottom die structure and the right die cavity bottom die structure are symmetrical with each other by taking the connecting column as a center;
step four: the left side of the blank is clamped on a left clamp of a turning and milling compound machine tool, at the moment, the left side and the right side of the blank are respectively clamped on the left clamp and the right clamp, then a cutter is adopted to cut off a connecting column, then a single-layer bottom die cavity is respectively processed on the cut-off surfaces of a left die cavity bottom die structure and a right die cavity bottom die structure, and finally polishing is carried out to form two die cavity bottom dies.
In the second step of the invention, the processing procedure of the bottom die structure of the right die cavity is as follows: the method comprises the steps of firstly turning and milling a bottom die main body, then turning and milling annular connecting grooves, a plurality of positioning grooves and concave positions on the cylindrical surface of the bottom die main body, turning and milling a plurality of layers of bottom die cavities on the end surface of the bottom die main body, and then drilling a plurality of cooling holes and connecting holes on the bottom die main body.
In the third step of the invention, the left die cavity bottom die structure is processed as follows: the method comprises the steps of firstly turning and milling a bottom die main body, then turning and milling annular connecting grooves, a plurality of positioning grooves and concave positions on the cylindrical surface of the bottom die main body, turning and milling a plurality of layers of bottom die cavities on the end surface of the bottom die main body, and then drilling a plurality of cooling holes and connecting holes on the bottom die main body.
In the invention, the number of the cooling holes is six, two adjacent cooling holes are mutually intersected to form a cross channel, and the end parts of the two adjacent cross channels are mutually communicated.
In the present invention, the connection holes communicate with the ends of two of the intersecting channels.
The beneficial effects of the invention are as follows: the cooling hole is connected with the connecting hole, the connecting hole is provided with the concave position, and the annular connecting groove is arranged at the radial extension position of the single-layer bottom die cavity of the bottom die main body, so that the cooling device has the advantages of reasonable structure, stable assembly and the like; in order to prevent the bar clamping from being influenced by the inner diameter of the main shaft, the processing method adopts a 'two-piece integrated' processing method, a round bar is used for processing two workpieces simultaneously, the two workpieces only waste one chuck clamping position, a large amount of processing time is saved while raw materials are saved, position errors caused by repeated clamping are eliminated, and the processing precision is higher.
Drawings
The invention is further described below with reference to the drawings and embodiments:
FIG. 1 is a schematic view of the structure of a bottom die of a die cavity;
FIG. 2 is a schematic view of the structure of FIG. 1 at another angle;
FIG. 3 is a side view of the bottom mold of the mold cavity;
FIG. 4 is a cross-sectional view taken along the direction A-A of FIG. 3;
fig. 5 is a schematic structural view of a processed blank.
Detailed Description
Referring to fig. 1 to 4, the die cavity die structure provided by the embodiment comprises a columnar die cavity main body 1, a single-layer die cavity 2 and a multi-layer die cavity 3 are respectively arranged at the left side and the right side of the die cavity main body 1, the opening directions of the single-layer die cavity 2 and the multi-layer die cavity 3 are opposite, a gas blowing hole 4 is communicated at the central position of the bottoms of the single-layer die cavity 2 and the multi-layer die cavity 3, a plurality of cooling holes 5 are formed in the radial extension position of the die cavity main body 1, a connecting hole 6 for communicating the cooling holes 5 is formed in the die cavity main body 1, concave positions 7 are formed in the periphery of the connecting hole 6, an annular connecting groove 8 is formed in the radial extension position of the die cavity 2 of the die main body 1, the annular connecting groove 8 is not more than 10mm away from the end face of the single-layer die cavity 2 on the die main body 1, so that the width of the annular connecting groove 8 is more than 3mm, and the depth of the annular connecting groove 8 is more than 3mm. The chuck clamping cannot be performed on the cylindrical surface corresponding to the annular connecting groove 8.
As a preferred embodiment, the number of the cooling holes 5 is six, two adjacent cooling holes 5 are intersected with each other to form an intersecting channel, three intersecting channels are formed in total, and the ends of the two adjacent intersecting channels are communicated with each other to form an annular cooling water channel. The connecting holes 6 are communicated with the end parts of the two intersecting channels, the connecting holes 6 serve as the center line of the front face of the bottom die main body 1, and the whole bottom die main body 1 is symmetrical to each other left and right by the center line, so that the rear face of the bottom die main body is convenient to process. The back of the bottom die main body 1 is provided with a second connecting hole 11, the second connecting hole 11 is communicated with the middle part of another cross channel, and the connecting hole 6 and the second connecting hole 11 are respectively used as water inlets and water outlets of the cooling water channels.
For easy installation, two positioning grooves 9 are arranged on the cylindrical surface of the bottom die main body 1. The diameter of the columnar bottom die main body 1 is larger than 50mm.
Referring to fig. 5, the processing technology of the cavity bottom die provided in the embodiment includes the following steps:
step one: preparing a cylindrical processing blank, wherein the blank is 45 # steel, the diameter of the blank is larger than 55mm, a turning and milling compound machine tool is prepared, and the diameter of a main shaft is smaller than 52mm;
step two: clamping the left side of the blank on a left clamp of a turning and milling composite machine tool, machining the right side of the blank by the turning and milling composite machine tool, and turning and milling a right die cavity bottom die structure on the right side of the blank; the processing process of the right die cavity bottom die structure is as follows: the method comprises the steps of firstly turning and milling a bottom die body 1, then turning and milling an annular connecting groove 8, a plurality of positioning grooves 9 and concave positions 7 on the cylindrical surface of the bottom die body 1, turning and milling a multi-layer bottom die cavity 3 on the end surface of the bottom die body 1, and then drilling a plurality of cooling holes 5 and connecting holes 6 on the bottom die body 1.
Step three: clamping the right side of the blank on a right clamp of a turning and milling composite machine tool, loosening a left clamp of the turning and milling composite machine tool, machining the left side of the blank by the turning and milling composite machine tool, and turning and milling the left side of the blank to form a left die cavity bottom die structure, wherein the left die cavity bottom die structure is connected with the right die cavity bottom die structure through a connecting column, and the left die cavity bottom die structure and the right die cavity bottom die structure are symmetrical with each other by taking the connecting column as a center; the processing process of the bottom die structure of the left die cavity is as follows: the method comprises the steps of firstly turning and milling a bottom die body 1, then turning and milling an annular connecting groove 8, a plurality of positioning grooves 9 and concave positions 7 on the cylindrical surface of the bottom die body 1, turning and milling a multi-layer bottom die cavity 3 on the end surface of the bottom die body 1, and then drilling a plurality of cooling holes 5 and connecting holes 6 on the bottom die body 1.
Step four: the left side of the blank is clamped on a left clamp of a turning and milling compound machine tool, at the moment, the left side and the right side of the blank are respectively clamped on the left clamp and the right clamp, then a cutter is adopted to cut off a connecting column, then a single-layer bottom die cavity 2 is respectively processed on the cut-off surfaces of a left die cavity bottom die structure and a right die cavity bottom die structure, and finally polishing is carried out to form two die cavity bottom dies.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are within the scope of the present invention.
Claims (5)
1. The processing technology of the die cavity bottom die is characterized by comprising the following steps of:
step one: preparing cylindrical processing blank with diameter larger than 55mm, preparing turning and milling compound machine tool with main shaft diameter smaller than 52mm,
step two: clamping the left side of the blank on a left clamp of a turning and milling composite machine tool, machining the right side of the blank by the turning and milling composite machine tool, and turning and milling a right die cavity bottom die structure on the right side of the blank;
step three: clamping the right side of the blank on a right clamp of a turning and milling composite machine tool, loosening a left clamp of the turning and milling composite machine tool, machining the left side of the blank by the turning and milling composite machine tool, and turning and milling the left side of the blank to form a left die cavity bottom die structure, wherein the left die cavity bottom die structure is connected with the right die cavity bottom die structure through a connecting column (10), and the left die cavity bottom die structure and the right die cavity bottom die structure are symmetrical with each other by taking the connecting column (10) as a center;
step four: the left side of the blank is clamped on a left clamp of a turning and milling compound machine tool, at the moment, the left side and the right side of the blank are respectively clamped on the left clamp and the right clamp, then a cutter is adopted to cut off a connecting column (10), then a single-layer bottom die cavity (2) is processed on the cut-off surfaces of a left die cavity bottom die structure and a right die cavity bottom die structure respectively, and finally, two die cavity bottom dies are formed by polishing.
2. The process for machining the bottom die of the die cavity according to claim 1, wherein: in the second step, the processing process of the bottom die structure of the right die cavity is as follows: firstly turning and milling a bottom die main body (1), then turning and milling annular connecting grooves (8), a plurality of positioning grooves (9) and concave positions (7) on the cylindrical surface of the bottom die main body (1), then turning and milling the end surface of the bottom die main body (1) to form a multi-layer bottom die cavity (3), and then drilling a plurality of cooling holes (5) and connecting holes (6) on the bottom die main body (1).
3. The process for machining the bottom die of the die cavity according to claim 1, wherein: in the third step, the processing procedure of the bottom die structure of the left die cavity is as follows: firstly turning and milling a bottom die main body (1), then turning and milling annular connecting grooves (8), a plurality of positioning grooves (9) and concave positions (7) on the cylindrical surface of the bottom die main body (1), then turning and milling the end surface of the bottom die main body (1) to form a multi-layer bottom die cavity (3), and then drilling a plurality of cooling holes (5) and connecting holes (6) on the bottom die main body (1).
4. A process for the production of a cavity bottom die according to claim 2 or 3, characterized in that: six cooling holes (5) are formed, two adjacent cooling holes (5) are mutually intersected to form a cross channel, and the end parts of the two adjacent cross channels are mutually communicated.
5. The process for machining the bottom die of the die cavity according to claim 4, wherein: the connecting holes (6) are communicated with the end parts of two of the cross channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327680.6A CN108357077B (en) | 2018-04-12 | 2018-04-12 | Machining process of die cavity bottom die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327680.6A CN108357077B (en) | 2018-04-12 | 2018-04-12 | Machining process of die cavity bottom die |
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| CN108357077A CN108357077A (en) | 2018-08-03 |
| CN108357077B true CN108357077B (en) | 2023-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109732879A (en) * | 2018-12-16 | 2019-05-10 | 广东星联精密机械有限公司 | A kind of bed die with octagon water channel |
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| CH452175A (en) * | 1966-08-17 | 1968-05-31 | Mehnert Horst | Device for cutting off a lost blown part in the production of hollow plastic bodies |
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