CN112454809A - Infusion apparatus injection molding device and method - Google Patents
Infusion apparatus injection molding device and method Download PDFInfo
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- CN112454809A CN112454809A CN202011036117.7A CN202011036117A CN112454809A CN 112454809 A CN112454809 A CN 112454809A CN 202011036117 A CN202011036117 A CN 202011036117A CN 112454809 A CN112454809 A CN 112454809A
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- injection molding
- feed cylinder
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 40
- 238000001802 infusion Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 14
- 238000005485 electric heating Methods 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 229910052573 porcelain Inorganic materials 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 235000010469 Glycine max Nutrition 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- WIBFFTLQMKKBLZ-SEYXRHQNSA-N n-butyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCCC WIBFFTLQMKKBLZ-SEYXRHQNSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 210000004994 reproductive system Anatomy 0.000 description 1
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1742—Mounting of moulds; Mould supports
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/60—Screws
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/74—Heating or cooling of the injection unit
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
- B29L2031/7544—Injection needles, syringes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an infusion set injection molding device and method, which comprises a control module, a charging barrel and a mold, wherein the control module is connected to the left end of the charging barrel, the mold is connected to the right end of the charging barrel, the charging barrel is divided into a first charging barrel section, a second charging barrel section and a third charging barrel section, corresponding electric heating rings are arranged inside the first charging barrel section, the second charging barrel section and the third charging barrel section, and the mold comprises a male mold and a female mold. The invention has the following beneficial effects: the charging barrel is divided into three sections, the temperature of each section of the charging barrel is controlled, the first section of the charging barrel is heated to 130 ℃ to play a preheating role, the second section of the charging barrel is heated to 160 ℃, the charging barrel is fully melted in the second section, and the third section of the charging barrel is heated to 145 ℃, so that the produced infusion apparatus is stable in property; the distance between the extrusion blades of the three sections of the charging barrel is gradually reduced, so that the materials of the three sections of the charging barrel are compressed, and the quality of the infusion apparatus is ensured; the male die and the female die are placed in the die groove, and the positioning is accurate.
Description
Technical Field
The invention relates to an infusion apparatus injection molding device and method, and belongs to the technical field of injection molding.
Background
The infusion apparatus is a disposable medical apparatus with large dosage and wide application range, and the dosage of the infusion apparatus is more than 50 hundred million in China every year in nearly 3 years. At present, transfusion systems widely used in China clinically are made of PVC materials and contain plasticizer diethyl phthalate (DEHP), but in recent years, reports that phthalic plasticizers such as phthalate can cause cancers and influence the development of child reproductive systems are continuously reported at home and abroad, and corresponding measures are taken in mainly developed countries in the world to strictly control the use of the phthalic plasticizers, so that the transfusion systems are produced by adopting PVC particles prepared by using epoxidized soybean butyl oleate as the plasticizer. The infusion set is formed by injection molding in the production process, but due to the nature of the infusion set, the temperature of the infusion set needs to be strictly controlled in the forming process, so that the quality of the finished infusion set can be ensured.
Disclosure of Invention
The invention aims to solve the technical problem of providing an infusion set injection molding device and an infusion set injection molding method.
The invention is realized by the following scheme: the injection molding device comprises a control module, a charging barrel and a mold, wherein the control module is connected to the left end of the charging barrel, the mold is connected to the right end of the charging barrel, the charging barrel is divided into a first charging barrel section, a second charging barrel section and a third charging barrel section, corresponding electric heating rings are arranged inside the first charging barrel section, the second charging barrel section and the third charging barrel section, and the mold comprises a male mold and a female mold.
The extrusion screw is arranged in the charging barrel and connected with the control module, the thread space in one section of the charging barrel on the extrusion screw is equal to the thread space in the second section of the charging barrel, and the thread space in the third section of the charging barrel is smaller than the thread space in the first section of the charging barrel.
The right end of the charging barrel is provided with a nozzle, the die is positioned at the right end of the nozzle, and the nozzle is communicated with a forming cavity in the die.
The forming cavity is positioned on the male die and the female die, and the male die and the female die are replaceable.
The feeder hopper is connected to the upper end of feed cylinder, the inside electric ceramic valve that is equipped with of lower extreme of feeder hopper, the feeder hopper with one section inside of feed cylinder is linked together.
The electric heating rings corresponding to the inner parts of the second section of the charging barrel and the third section of the charging barrel are respectively connected to the control module (1), and the control module controls the three electric heating rings to be heated to different temperatures.
A method for injection molding of an infusion set, which comprises the following steps,
the method comprises the following steps of firstly, dissolving sol, namely sequentially heating a charging barrel of an injection molding machine to different temperatures along a direction from a feeding hopper to a nozzle, wherein the charging barrel is a charging barrel section, a charging barrel section and a charging barrel section; heating PVC plastics added into the charging barrel to a molten state by the charging barrel;
step two, die assembly;
injecting glue, namely injecting the molten PVC plastic into a mold through an injection nozzle;
step four, pressure maintaining;
step five, cooling;
sixthly, opening the mold;
and step seven, demolding.
A method for injection molding of an infusion set, which comprises the following steps,
firstly, sol is prepared, wherein a charging barrel of an injection molding machine is sequentially provided with a charging barrel three section, a charging barrel two section and a charging barrel one section along the direction from a feed hopper to a nozzle, the charging barrel one section, the charging barrel two section and the charging barrel three section are heated to different temperatures, the temperatures are sequentially increased, and PVC plastics added into the charging barrel are heated to a molten state by the charging barrel;
step two, die assembly;
injecting glue, namely injecting the molten PVC plastic into a mold through a nozzle, wherein the glue injection speed is 90% of the maximum speed;
step four, pressure maintaining;
step five, cooling;
sixthly, opening the mold;
and step seven, demolding.
A method for injection molding of an infusion set, which comprises the following steps,
the method comprises the following steps of firstly, dissolving sol, wherein a charging barrel of an injection molding machine sequentially comprises a three-section charging barrel, a two-section charging barrel and a one-section charging barrel along the direction from a feeding hopper to a nozzle, heating the one-section charging barrel to 130 ℃, heating the two-section charging barrel to 160 ℃, and heating the three-section charging barrel to 145 ℃; heating PVC plastics added into the charging barrel to a molten state by the charging barrel;
step two, die assembly is carried out for 3 s;
injecting glue, namely injecting the molten PVC plastic into a mold through a nozzle, wherein the glue injection speed is 90% of the maximum speed, and the glue injection pressure is 140 bar;
step four, maintaining the pressure, wherein the pressure maintaining pressure is 60bar, and the pressure maintaining time is 2 s;
step five, cooling for 2 s;
opening the mold, wherein the mold opening time is 1 s;
and seventhly, demolding for 1 s.
The maximum speed refers to the maximum speed at which the extrusion screw moves during injection.
The invention has the beneficial effects that:
1. the charging barrel of the injection molding device and the injection molding method of the infusion set is divided into three sections, the temperature of each section of the charging barrel is controlled, the first section of the charging barrel is heated to 130 ℃ to play a preheating role, the second section of the charging barrel is heated to 160 ℃, the second section of the charging barrel is fully melted, and the third section of the charging barrel is heated to 145 ℃, so that the produced infusion set is stable in property;
2. according to the infusion apparatus injection molding device and method, the distances between the extrusion blades of the three sections of the charging barrel are gradually reduced, so that materials in the three sections of the charging barrel are compressed, and the quality of the infusion apparatus is ensured;
3. the male die and the female die of the infusion apparatus injection molding device and the infusion apparatus injection molding method are placed in the die groove, and the positioning is accurate.
Drawings
Fig. 1 is a schematic front view cross-sectional structure diagram of an infusion apparatus injection molding device and method of the present invention.
In the figure: the device comprises a control module 1, a charging barrel 2, a charging barrel 3, a charging barrel three, an electric heating ring 5, a male die 6, a female die 7, an extrusion screw 8, a nozzle 9, a molding cavity 10, a feed hopper 11 and an electric ceramic valve 12.
Detailed Description
The invention is further described below with reference to fig. 1, without limiting the scope of the invention.
In which like parts are designated by like reference numerals. It is noted that the terms "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, and the drawings are in greatly simplified form and employ non-precise ratios, merely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention.
In the following description, for purposes of clarity, not all features of an actual implementation are described, well-known functions or constructions are not described in detail since they would obscure the invention with unnecessary detail, it being understood that in the development of any actual embodiment, numerous implementation details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, changing from one implementation to another, and it being recognized that such development effort might be complex and time consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.
The utility model provides an infusion set injection moulding device, its includes control module 1, feed cylinder and mould, and control module 1 connects the left end at the feed cylinder, and the right-hand member at the feed cylinder is connected to the mould, and the feed cylinder divide into one section 2 of feed cylinder, feed cylinder two-section 3 and feed cylinder three-section 4, and the inside of one section 2 of feed cylinder, feed cylinder two-section 3 and feed cylinder three-section 4 all is equipped with corresponding electric heat ring 5, and the mould includes formpiston 6 and bed die 7.
The inside of feed cylinder is equipped with extrusion screw 8, and extrusion screw 8 is connected with control module 1, and the screw thread interval in one section 2 of feed cylinder is equal with the screw thread interval in two sections 3 of feed cylinder on the extrusion screw 8, and the screw thread interval in three sections 4 of feed cylinder is less than the screw thread interval in one section 2 of feed cylinder.
The right end of the charging barrel is provided with a nozzle 9, the die is positioned at the right end of the nozzle 9, and the nozzle 9 is communicated with a forming cavity 10 in the die.
The forming cavity 10 is located on the male die 6 and the female die 7, and the male die 6 and the female die 7 are replaceable.
The upper end of feed hopper 11 is connected to the upper end of feed hopper 11, and the lower extreme inside of feed hopper 11 is equipped with electric ceramic valve 12, and feed hopper 11 is linked together with the inside of one section 2 of feed hopper.
The electric heating rings 5 corresponding to the interior of the two sections 3 and the three sections 4 of the charging barrel are respectively connected to the control module 1, and the control module 1 controls the three electric heating rings 5 to be heated to different temperatures.
A method for injection molding of an infusion set, which comprises the following steps,
the method comprises the following steps of firstly, sol dissolving, wherein a material cylinder of an injection molding machine sequentially comprises a material cylinder third section 4, a material cylinder second section 3 and a material cylinder first section 2 along the direction from a feed hopper 11 to a nozzle 9, the material cylinder first section 2 is heated to 130 ℃, the material cylinder second section 3 is heated to 160 ℃, and the material cylinder third section 4 is heated to 145 ℃; heating PVC plastics added into the charging barrel to a molten state by the charging barrel;
step two, die assembly is carried out for 3 s;
injecting glue, namely injecting the molten PVC plastic into a mold through a nozzle 9, wherein the glue injection speed is 90% of the maximum speed, and the glue injection pressure is 140 bar; the maximum speed is the maximum speed at which the extrusion screw 8 moves during injection;
step four, maintaining the pressure, wherein the pressure maintaining pressure is 60bar, and the pressure maintaining time is 2 s;
step five, cooling for 2 s;
opening the mold, wherein the mold opening time is 1 s;
and seventhly, demolding for 1 s.
Although the invention has been described and illustrated in some detail, it should be understood that various modifications may be made to the described embodiments or equivalents may be substituted, as will be apparent to those skilled in the art, without departing from the spirit of the invention.
Claims (10)
1. An infusion set injection molding device is characterized in that: it includes control module (1), feed cylinder and mould, control module (1) is connected the left end of feed cylinder, the mould is connected the right-hand member of feed cylinder, the feed cylinder divide into one section (2) of feed cylinder, feed cylinder two-section (3) and feed cylinder three-section (4), one section (2) of feed cylinder two-section (3) with the inside of feed cylinder three-section (4) all is equipped with corresponding electric heat circle (5), the mould includes formpiston (6) and bed die (7).
2. The infusion set injection molding device according to claim 1, characterized in that: the inside of feed cylinder is equipped with extrusion screw (8), extrusion screw (8) with control module (1) is connected, extrusion screw (8) go up the screw thread interval in one section of feed cylinder (2) with the screw thread interval in feed cylinder two-stage section (3) equals the screw thread interval in feed cylinder three-section (4) is less than the screw thread interval in one section of feed cylinder (2).
3. The infusion set injection molding device according to claim 1, characterized in that: the right-hand member of feed cylinder is equipped with and penetrates mouth (9), the mould is located the right-hand member of penetrating mouth (9), penetrate mouth (9) with shaping chamber (10) in the mould are linked together.
4. The infusion set injection molding device according to claim 2, characterized in that: the forming cavity (10) is located on the male die (6) and the female die (7), and the male die (6) and the female die (7) are replaceable.
5. The infusion set injection molding device according to claim 1, characterized in that: feed hopper (11) is connected to the upper end of feed cylinder, the inside electric porcelain valve (12) that is equipped with of lower extreme of feed hopper (11), feed hopper (11) with the inside of one section (2) of feed cylinder is linked together.
6. The infusion set injection molding device according to claim 1, characterized in that: the electric heating rings (5) corresponding to the interior of the two sections (3) and the three sections (4) of the charging barrel are respectively connected to the control module (1), and the control module (1) controls the three electric heating rings (5) to be heated to different temperatures.
7. The injection molding method of the infusion apparatus is characterized by comprising the following steps: which comprises the following steps of,
firstly, sol is prepared, wherein a charging barrel of an injection molding machine is sequentially provided with a three-section charging barrel (4), a two-section charging barrel (3) and a one-section charging barrel (2) along the direction from a feed hopper (11) to a nozzle (9), and the one-section charging barrel (2), the two-section charging barrel (3) and the three-section charging barrel (4) are heated to different temperatures; heating PVC plastics added into the charging barrel to a molten state by the charging barrel;
step two, die assembly;
injecting glue, namely injecting the molten PVC plastic into a mold through an injection nozzle (9);
step four, pressure maintaining;
step five, cooling;
sixthly, opening the mold;
and step seven, demolding.
8. The injection molding method of the infusion set according to claim 7, wherein the injection molding method comprises the following steps: which comprises the following steps of,
firstly, sol is prepared, wherein a charging barrel of an injection molding machine is sequentially provided with a three-section charging barrel (4), a two-section charging barrel (3) and a one-section charging barrel (2) along the direction from a feed hopper (11) to a nozzle (9), the one-section charging barrel (2), the two-section charging barrel (3) and the three-section charging barrel (4) are heated to different temperatures, the temperatures are sequentially increased, and PVC plastics added into the charging barrel are heated to a molten state by the charging barrel;
step two, die assembly;
injecting glue, namely injecting the molten PVC plastic into a mold through an injection nozzle (9), wherein the glue injection speed is 90% of the maximum speed;
step four, pressure maintaining;
step five, cooling;
sixthly, opening the mold;
and step seven, demolding.
9. The injection molding method of the infusion set according to claim 7, wherein the injection molding method comprises the following steps: which comprises the following steps of,
the method comprises the following steps that firstly, sol is prepared, a material cylinder of an injection molding machine sequentially comprises a material cylinder three section (4), a material cylinder two section (3) and a material cylinder one section (2) along the direction from a feed hopper (11) to a nozzle (9), the material cylinder one section (2) is heated to 130 ℃, the material cylinder two section (3) is heated to 160 ℃, and the material cylinder three section (4) is heated to 145 ℃; heating PVC plastics added into the charging barrel to a molten state by the charging barrel;
step two, die assembly is carried out for 3 s;
injecting glue, namely injecting the molten PVC plastic into a mold through a nozzle (9), wherein the glue injection speed is 90% of the maximum speed, and the glue injection pressure is 140 bar;
step four, maintaining the pressure, wherein the pressure maintaining pressure is 60bar, and the pressure maintaining time is 2 s;
step five, cooling for 2 s;
opening the mold, wherein the mold opening time is 1 s;
and seventhly, demolding for 1 s.
10. The injection molding method of the infusion set according to claim 9, wherein the injection molding method comprises the following steps: the maximum speed is the maximum speed at which the extrusion screw (8) moves during injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011036117.7A CN112454809A (en) | 2020-09-27 | 2020-09-27 | Infusion apparatus injection molding device and method |
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| CN202011036117.7A CN112454809A (en) | 2020-09-27 | 2020-09-27 | Infusion apparatus injection molding device and method |
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Application publication date: 20210309 |