CN210651829U - Pre-blowing mold capable of erecting bag for blow molding - Google Patents
Pre-blowing mold capable of erecting bag for blow molding Download PDFInfo
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- CN210651829U CN210651829U CN202020395103.3U CN202020395103U CN210651829U CN 210651829 U CN210651829 U CN 210651829U CN 202020395103 U CN202020395103 U CN 202020395103U CN 210651829 U CN210651829 U CN 210651829U
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Abstract
The utility model discloses a can found bag blow molding with blowing mould in advance relates to the production technical field that can found the bag. Including left side mould and right side mould, left die cavity has been seted up to one side of left side mould, right die cavity has been seted up to one side of right side mould, left side die cavity and right die cavity constitute and form the preforming chamber, the cross section of preforming chamber is the runway type, the preforming chamber is used for becoming the midbody with bottle embryo blow molding, and this midbody is used for the blow molding to become can founding the bag, is equipped with left heating element in the inside of the left side mould that is close to left die cavity, is equipped with right heating element in the inside of the right side mould that is close to right die cavity, left side mould and right side mould pass through locking device swing joint. By controlling the temperature of the pre-forming cavity of the pre-blowing mold, the defect of uneven bag body thickness after blow molding of a vertical bag and other special-shaped products can be effectively overcome.
Description
Technical Field
The utility model relates to a can found the production technical field of bag, more specifically the utility model relates to a can found bag blow molding with blowing mould in advance that says so.
Background
In large infusion pharmaceutical enterprises, particularly production of standable bags, the enterprises adopt two-step method for manufacturing infusion containers, the bottle blowing molding adopts a linear preheating bidirectional stretching blow molding machine (bottle blowing machine for short) to heat bag blanks to proper temperature and then stretch and blow mold the bag blanks for one time, and the technological process comprises the following steps: bag blank → rotary heating mechanism → blank taking and blank conveying mechanism → mould station blow moulding and stretch forming → bag container can be erected.
The bag body of the vertical bag type large infusion product is in an oblate special-shaped shape due to the particularity of the shape, the shape of a bag blank is circular, and the thickness of the periphery of the cross section of the finally formed bag body is uneven due to the fact that the stretching length of the bag body is inconsistent during bag blowing forming, the two sides of the short axis of the bag body are thick, and the two sides of the long axis and the edge of the bottom of the bag body are thin (shown in detail in figure 1). The uneven thickness of the periphery of the bag body of the vertical bag product can cause the thinnest part to be easily scratched in the production process, and the uniformity of the bag body does not influence the use effect, the appearance quality of the product and the like. The prior bottle blowing machine in China adopts a process of cold blank reheating and then one-step blow molding, and the problem of uniformity of bottle bodies of products capable of standing bags can not be solved.
SUMMERY OF THE UTILITY MODEL
The invention provides a pre-blowing mold for blow molding of a vertical bag, which aims to solve the problems that in the actual production process, the temperature around the bag blank is uniform when a bottle blowing machine performs blow molding, the formed vertical bag is oblate, the long axis and the short axis of the bag body are inconsistent, the stretching ratio of the bag blank is inconsistent during blow molding, and the short axis and the long axis of the bottle body after the vertical bag forming are thick and thin.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a can found bag blow molding with blowing mould in advance, includes left side mould and right mould, left die cavity has been seted up to one side of left side mould, right die cavity has been seted up to one side of right side mould, left side die cavity and right die cavity are constituteed and are preformed the die cavity, preformed die cavity's cross section is the runway type, preformed die cavity is used for becoming the midbody with bottle embryo blowing, and this midbody is used for blowing into can founding the bag, is equipped with left heating element in the inside of the left side mould that is close to left die cavity, is equipped with right heating element in the inside of the right mould that is close to right die cavity, left side mould and right mould pass through locking device swing joint.
Further, left die cavity includes left minor axis district and left major axis district, left heating assembly includes the left zone of heating A that is close to left minor axis district setting, the left zone of heating C that is close to left major axis district setting and the left zone of heating B that sets up in the transition region setting between the left zone of heating A, the left zone of heating C, the temperature of the left zone of heating A > the temperature of the left zone of heating B > the temperature of the left zone of heating C.
Furthermore, the left heating area A, the left heating area B and the left heating area C respectively comprise a plurality of heating holes which are vertically penetrated and arranged close to the outer contour of the preforming cavity, each heating hole is internally provided with an electric heating pipe, and each electric heating pipe is independently controlled.
Further, right die cavity includes right minor axis district and right major axis district, right side heating element includes the right heating district A that is close to the setting of right minor axis district, the right heating district C that is close to the setting of right major axis district and the right heating district B that sets up in the transition region between the right heating district A, the right heating district C, the temperature of the right heating district A > the temperature of the right heating district B > the temperature of the right heating district C.
Furthermore, the right heating area A, the right heating area B and the right heating area C respectively comprise a plurality of heating holes which are vertically penetrated and arranged close to the outer contour of the preforming cavity, each heating hole is internally provided with an electric heating pipe, and each electric heating pipe is independently controlled.
Furthermore, the top and the bottom of the pre-forming cavity are both provided with openings, a bottom die is arranged in the opening at the bottom of the pre-forming cavity, and a bottom die cavity for bottom forming of the intermediate and protection of the hanging ring of the intermediate is formed between the bottom die and the opening at the bottom of the pre-forming cavity.
Furthermore, a bottom die guide rod with adjustable height penetrates through the bottom die, and one end of the bottom die guide rod is arranged in the bottom die cavity.
Furthermore, the locking device comprises a positioning pin and a positioning hole which are matched with each other, the positioning pin is vertically arranged on the left side die and/or the right side die, and the positioning hole matched with the positioning pin is arranged in the left side die and/or the right side die.
Furthermore, after the left side die and the right side die are closed, the left die cavity and the right die cavity move up and down and the left and right movement is less than or equal to 0.2 mm; and a joint line is arranged after the left side die and the right side die are closed, and the joint line is less than or equal to 0.3 mm.
Compared with the prior art, the utility model beneficial effect who has is:
1. the utility model discloses, novel structure, the practicality is strong. The realization can found special-shaped plastic nature containers such as bag and carry out the preblowing earlier to the midbody that is used for finally blowing to become can found bag before final blow molding, through setting up the line array subregion heating structure around left die cavity and right die cavity, subregion heating device carries out accurate heating and tensile to the midbody for the midbody realizes can standing bag body thickness evenly after final blow molding.
Drawings
FIG. 1 is a schematic view of a stand-up pouch according to the background of the invention;
FIG. 2 is a plan view of a pre-blowing mold for blow molding of a standable bag according to the present invention;
FIG. 3 is a front view of a pre-blowing mold for blow molding of a standable bag according to the present invention;
FIG. 4 is a side view of a pre-blowing mold for blow molding of a standable bag according to the present invention;
fig. 5 is a schematic view of a left side mold of a pre-blowing mold for blow molding of a vertical bag of the present invention.
The labels in the figure are: 1-left side die, 2-right side die, 3-left die cavity, 4-right die cavity, 5-left heating zone A, 6-left heating zone B, 7-left heating zone C, 8-right heating zone A, 9-right heating zone B, 10-right heating zone C, 11-electric heating tube, 12-heating hole, 13-bottom die, 14-bottom die guide rod, 15-bottom die cavity, 16-preforming cavity, 17-joint line, 18-positioning pin and 19-positioning hole.
Detailed Description
The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
as shown in fig. 2, a pre-blowing mold for blow molding of a standable bag comprises a left mold 1 and a right mold 2, wherein a left mold cavity 3 is formed in one side of the left mold 1, a right mold cavity 4 is formed in one side of the right mold 2, a pre-forming cavity 16 is formed by the left mold cavity 3 and the right mold cavity 4, the cross section of the pre-forming cavity 16 is of a runner type, the pre-forming cavity 16 is used for blow molding a bottle blank into an intermediate body for blow molding the bottle blank into the standable bag, a left heating assembly is arranged inside the left mold 1 close to the left mold cavity 3, a right heating assembly is arranged inside the right mold 2 close to the right mold cavity 4, and the left mold 1 and the right mold 2 are movably connected through a locking device.
The left die cavity 3 and the right die cavity 4 are two completely symmetrical structures, and when the left die 1 and the right die 2 are closed through the locking device, the up-down displacement and the left-right displacement of the left die cavity 3 and the right die cavity 4 are controlled within 0.2 mm; and a joint line 17 is arranged after the left side die 1 and the right side die 2 are closed, and the joint line 17 is less than or equal to 0.3 mm. The structure of the pre-forming cavity 16 is a special-shaped structure, and the shape of the pre-forming cavity 16 is determined by the shape of the finally formed standing bag, namely, the shape of the intermediate body, namely the shape of the pre-forming cavity 16, is reversely pushed through the shape of the finally formed standing bag, and then the shape of the pre-forming cavity 16 is divided into two parts to obtain the shapes of the left cavity 3 and the right cavity 4.
In the present embodiment, the locking device includes a positioning pin 18 and a positioning hole 19, which are matched with each other, the positioning pin 18 is vertically disposed on the left side die 1 and/or the right side die 2, and the positioning hole 19 matched with the positioning pin 18 is opened in the left side die 1 and/or the right side die 2. The positioning pin 18 and the positioning hole 19 are used for ensuring the alignment of the left die cavity 3 and the right die cavity 4 after die assembly.
In this embodiment, the left mold cavity 3 includes a left minor axis region and a left major axis region, the left heating assembly includes a left heating zone a5 disposed proximate the left minor axis region, a left heating zone C7 disposed proximate the left major axis region, and a left heating zone B6 disposed at the transition region between the left heating zone a5 and the left heating zone C7, the temperature of the left heating zone a5 > the temperature of the left heating zone B6 > the temperature of the left heating zone C7.
In this embodiment, each of the left heating zone a5, the left heating zone B6, and the left heating zone C7 includes a plurality of heating holes 12 vertically penetrating and opening near the outer contour of the preform cavity 16, the heating holes 12 are spaced from the edge of the preform cavity 16 by more than 5mm, each heating hole 12 is provided with an electric heating tube 11 therein, and each electric heating tube 11 is controlled independently. The electric heating tube 11 of the left heating area A5 heats the left short axis area of the intermediate body, the electric heating tube 11 of the left heating area B6 heats the transition area between the left short axis and the left long axis of the intermediate body, and the electric heating tube 11 of the left heating area C7 heats the left long axis area of the intermediate body. Temperature distribution of a heating area: the temperature of the left heater zone a5 > the temperature of the left heater zone B6 > the temperature of the left heater zone C7. The temperature of the short shaft side of the bag body (namely the intermediate body) after pre-blowing is higher than that of the long shaft side; and finally, due to the stretching characteristics of the plastic during blow molding, the stretching of the high-temperature area is more, the stretching of the low-temperature area is less, and the peripheral thickness of the blow molded bag body is uniform.
In this embodiment, the right mold cavity 4 includes a right minor axis region and a right major axis region, the right heating assembly includes a right heating zone A8 disposed proximate the right minor axis region, a right heating zone C10 disposed proximate the right major axis region, and a right heating zone B9 disposed at a transition region between the right heating zone A8 and the right heating zone C10, the right heating zone A8 has a temperature > the temperature of the right heating zone B9 > the temperature of the right heating zone C10.
In this embodiment, the right heating zone A8, the right heating zone B9, and the right heating zone C10 each include a plurality of heating holes 12 vertically penetrating and opening near the outer contour of the preform cavity 16, each heating hole 12 is provided with an electric heating tube 11 therein, and each electric heating tube 11 is controlled independently. Therefore, the electric heating tubes 11 arranged among the left heating zone a5, the left heating zone B6, the left heating zone C7, the right heating zone A8, the right heating zone B9 and the right heating zone C10 form a linear array multi-electric heating tube 11 structure, and meanwhile, because each electric heating tube 11 can be independently controlled, the temperature of each heating zone can be independently controlled, and the temperature requirement of the heating zones can be adjusted.
The electric heating tube 11 of the right heating area A8 heats the right short axis area of the intermediate body, the electric heating tube 11 of the right heating area B9 heats the transition area between the right short axis and the right long axis of the intermediate body, and the electric heating tube 11 of the right heating area C10 heats the right long axis area of the intermediate body. Temperature distribution of a heating area: the temperature of the right heating zone A8 > the temperature of the right heating zone B9 > the temperature of the right heating zone C10.
Wherein, the temperature of the left heating area A5 is equal to that of the right heating area A8, and is generally 100-120 ℃; the temperature of the left heating zone B6 is equal to the temperature of the right heating zone B9, and is generally between 90 ℃ and 110 ℃; the temperature in the left heating zone C7, which is equal to the temperature in the right heating zone C10, is generally 80 to 100 ℃. The temperature of the short shaft side of the bag body (namely the intermediate body) after pre-blowing is higher than that of the long shaft side; and finally, due to the stretching characteristics of the plastic during blow molding, the stretching of the high-temperature area is more, the stretching of the low-temperature area is less, and the peripheral thickness of the blow molded bag body is uniform.
In this embodiment, as shown in fig. 3 and 5, the top and bottom of the pre-mold cavity 16 are both open, and as shown in fig. 4, the opening is also formed by a left bottom mold 13 opening at the bottom of the left mold 1 and a right bottom mold 13 opening at the bottom of the right mold 2. A bottom die 13 is provided in the bottom opening of the pre-forming cavity 16, and a bottom die cavity 15 for bottom molding of the intermediate and protection of the suspension ring of the intermediate is formed between the bottom die 13 and the bottom opening of the pre-forming cavity 16. Bottom die guide rods 14 with adjustable heights penetrate through the bottom die 13, and one ends of the bottom die guide rods 14 are arranged in a bottom die cavity 15.
When the pre-blowing die provided by the utility model is used, the left die 1 and the right die 2 are locked after being matched, and the up-down displacement and the left-right displacement of the left die cavity 3 and the right die cavity 4 are controlled within 0.2 mm; and a joint line 17 is arranged after the left side die 1 and the right side die 2 are closed, and the joint line 17 is less than or equal to 0.3 mm. The heated bottle preform is then robotically placed into the preform cavity 16 while the bottom of the bottle preform is secured to the bottom mold guide 14 and then blown with compressed air to form a pre-blow bag shape, an intermediate as described herein, which is used to be ultimately blow molded into a collapsible bag in another mold cavity. The utility model discloses an in preheating the mould, when the bottle embryo is the midbody by blowing in advance, because of 16 temperature major axis regions are low in the preforming die cavity when midbody and preforming die cavity 16 paste mutually, the minor axis is regional high, the midbody temperature that leads to after blowing in advance also is that the major axis is regional low, the minor axis is regional high, after the product after blowing in advance gets into the bottle blowing station, the regional stretching that the temperature is high is many during blow molding, the regional stretching that the temperature is low is few, let final blow molding can found bag product thickness all around even.
By controlling the temperature of the pre-forming cavity 16 of the pre-blowing mold, the defect of uneven bag body thickness after blow molding of a vertical bag and other special-shaped products can be effectively overcome.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a can found bag blowing forming with blowing mould in advance, its characterized in that, includes left side mould (1) and right side mould (2), left die cavity (3) have been seted up to one side of left side mould (1), right die cavity (4) have been seted up to one side of right side mould (2), left side mould cavity (3) and right die cavity (4) are constituteed and are preformed die cavity (16), the cross section of preformed die cavity (16) is the runway type, preformed die cavity (16) are used for becoming the midbody with bottle embryo blowing, and this midbody is used for blowing into can found the bag, is equipped with left heating element in left side mould (1) inside near left die cavity (3), is equipped with right heating element in right side mould (2) inside near right die cavity (4), left side mould (1) and right side mould (2) are through locking device swing joint.
2. The pre-blowing mold for blow molding of the standable bag according to claim 1, wherein the left mold cavity (3) comprises a left short axis region and a left long axis region, the left heating assembly comprises a left heating region a (5) disposed near the left short axis region, a left heating region C (7) disposed near the left long axis region, and a left heating region B (6) disposed at a transition region between the left heating region a (5) and the left heating region C (7), and the temperature of the left heating region a (5) is greater than the temperature of the left heating region B (6) is greater than the temperature of the left heating region C (7).
3. The pre-blowing mold for blow molding of the standable bag according to claim 2, wherein the left heating zone A (5), the left heating zone B (6) and the left heating zone C (7) each comprise a plurality of heating holes (12) which are vertically penetrated and opened close to the outer contour of the pre-forming cavity (16), each heating hole (12) is internally provided with an electric heating tube (11), and each electric heating tube (11) is independently controlled.
4. The pre-blowing mold for blow molding of the standable bag according to claim 1, wherein the right mold cavity (4) comprises a right minor axis region and a right major axis region, the right heating assembly comprises a right heating region a (8) disposed near the right minor axis region, a right heating region C (10) disposed near the right major axis region, and a right heating region B (9) disposed at a transition region between the right heating region a (8) and the right heating region C (10), and the temperature of the right heating region a (8) is greater than the temperature of the right heating region B (9) is greater than the temperature of the right heating region C (10).
5. The pre-blowing mold for blow molding of the standable bag according to claim 4, wherein the right heating zone A (8), the right heating zone B (9) and the right heating zone C (10) each comprise a plurality of heating holes (12) which are vertically penetrated and opened close to the outer contour of the pre-forming cavity (16), each heating hole (12) is internally provided with an electric heating pipe (11), and each electric heating pipe (11) is independently controlled.
6. The pre-blowing mold for blow molding of the standable bag according to claim 1, wherein the top and the bottom of the pre-mold cavity (16) are both open, a bottom mold (13) is arranged in the bottom opening of the pre-mold cavity (16), and a bottom mold cavity (15) for bottom molding of the intermediate body and protection of the suspension ring of the intermediate body is formed between the bottom mold (13) and the bottom opening of the pre-mold cavity (16).
7. The pre-blowing mold for blow molding of the standable bag according to claim 6, wherein the bottom mold (13) has a bottom mold guide rod (14) with adjustable height extending therethrough, and one end of the bottom mold guide rod (14) is disposed in the bottom mold cavity (15).
8. The pre-blowing mold for blow molding of the standable bag according to claim 1, characterized in that the locking device comprises a positioning pin (18) and a positioning hole (19) which are matched with each other, the positioning pin (18) is vertically arranged on the left side mold (1) and/or the right side mold (2), and the positioning hole (19) matched with the positioning pin (18) is arranged in the left side mold (1) and/or the right side mold (2).
9. The pre-blowing mold for blow molding of the standable bag according to claim 8, wherein after the left side mold (1) and the right side mold (2) are closed, the left mold cavity (3) and the right mold cavity (4) are displaced up and down and the left and right displacement is less than or equal to 0.2 mm; a joint line (17) is arranged after the left side die (1) and the right side die (2) are closed, and the joint line (17) is less than or equal to 0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020395103.3U CN210651829U (en) | 2020-03-25 | 2020-03-25 | Pre-blowing mold capable of erecting bag for blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020395103.3U CN210651829U (en) | 2020-03-25 | 2020-03-25 | Pre-blowing mold capable of erecting bag for blow molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210651829U true CN210651829U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020395103.3U Active CN210651829U (en) | 2020-03-25 | 2020-03-25 | Pre-blowing mold capable of erecting bag for blow molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210651829U (en) |
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2020
- 2020-03-25 CN CN202020395103.3U patent/CN210651829U/en active Active
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