CN112263476A

CN112263476A - Container and method of manufacturing container

Info

Publication number: CN112263476A
Application number: CN202011094043.2A
Authority: CN
Inventors: 陈华卿
Original assignee: Taizhou Xianglong Food Container Technology Co ltd
Current assignee: Taizhou Xianglong Food Container Technology Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-01-26

Abstract

The invention provides a container and a container manufacturing method, and belongs to the technical field of packaging. It solves the problem that the existing distribution container is not suitable for directly injecting the content into the body. The container comprises a thin wall, wherein an air chamber for storing air and a containing cavity for storing contents are arranged in the thin wall, and a waist part which is positioned between the air chamber and the containing cavity and shrinks towards the inner side is arranged in the thin wall; the thin wall of the cavity region includes a synthetic resin outer layer and a synthetic resin inner layer located inside the synthetic resin outer layer, and the synthetic resin inner layer can be peeled off from the inside of the synthetic resin outer layer. Vaccines and medicines are stored in the cavity, the needle head is communicated with the cavity to extrude the thin wall of the air chamber region, and gas enters the thin wall of the cavity region between the synthetic resin outer layer and the synthetic resin inner layer through the waist; the vaccine and drug are expelled from the needle, the inner layer of synthetic resin gradually shrinks and collapses, and the thin wall in the region of the air chamber also gradually shrinks and collapses.

Description

Container and method of manufacturing container

Technical Field

The invention belongs to the technical field of packaging, and relates to a container, in particular to a small-volume container suitable for packaging medicines and vaccines.

The invention belongs to the technical field of packaging, and relates to a container, in particular to a container manufacturing method.

Background

The vaccine is usually packaged by glass bottles, and with the 2019-nCoV coronavirus pandemic and the vaccine to be developed successfully, the number of containers for packaging the vaccine is seriously insufficient.

Previously, plastic containers have been commonly used for packaging industrial goods, daily chemical goods, and food. With the improvement of various technical parameters of plastic containers, the plastic containers are increasingly possible to be used for packaging vaccines. The plastic vaccine container can be formed in one step by using an injection-blowing production process, and has the advantages of high production efficiency, uniform and smooth bottle wall, stable quality and the like. The plastic vaccine container also has the advantages of light weight, no breakage and convenient transportation.

EVOH shows excellent blocking effect on gas, smell, spice, solvent and the like, and in the field of plastic containers, EVOH is made into a middle barrier layer of a composite film, so that the shelf life of contents is effectively prolonged.

In the case of vaccine injection, the vaccine in the vaccine packaging container is first taken out by a syringe and then injected into a human body, and a large amount of syringes are obviously consumed in the process. That is, the conventional vaccine injection cannot reduce the injection cost and improve the vaccine injection popularity, thereby being not beneficial to shortening the virus killing period.

For this reason, a plastic packaging container with a needle, such as a molding method (application No. 03805179.6) for manufacturing a dispensing container filled with a medium to be dispensed, which is capable of injecting the contents directly into an infusion container, is also conceived, and this necessarily reduces the cost of vaccine and drug injections if the contents of the container are to be injected directly into the body, although it is not currently suitable for direct injection into the body.

Disclosure of Invention

The invention provides a container, and the technical problem to be solved by the invention is how to reduce the injection cost of vaccines and medicines.

The invention provides a container manufacturing method, and aims to solve the technical problem of how to provide a container manufacturing method suitable for industrial production.

The technical problem to be solved by the invention can be realized by the following technical scheme: a container comprises a thin wall, wherein the thin wall is internally provided with an air chamber for storing air and a containing cavity for storing contents, and the thin wall is internally provided with a waist part which is positioned between the air chamber and the containing cavity and shrinks inwards; the thin wall of the cavity area comprises a synthetic resin outer layer and a synthetic resin inner layer positioned on the inner side of the synthetic resin outer layer, and the synthetic resin inner layer can be stripped from the inner side of the synthetic resin outer layer; when the thin wall of the air chamber region is pressed, gas can enter between the outer layer of synthetic resin and the inner layer of synthetic resin in the thin wall of the cavity region through the waist.

Vaccines and medicines are stored in the cavity, and the cavity is filled with the vaccines and medicines usually, so that gas is prevented from remaining, the vaccines and medicines can be stored more effectively, and the gas is prevented from being injected into the human body. The thin wall of the cavity region is connected with a needle, and the needle can pierce the thin wall of the cavity region, especially the synthetic resin inner layer, so that the needle is communicated with the cavity. And extruding the thin wall of the air chamber region, wherein the air enters between the synthetic resin outer layer and the synthetic resin inner layer in the thin wall of the cavity region through the waist. The synthetic resin inner layer bears the pressure increase, and bacterin and medicine are discharged from the syringe needle, and synthetic resin inner layer shrinks gradually and shrivels, and the thin wall in air chamber region also shrinks gradually and shrivels. Through the volume of control air chamber and appearance chamber, just enable synthetic resin inner layer shrink shriveling to the limit, and then guarantee vaccine and medicine discharge amount, reduce the total amount that vaccine and medicine remain in the container promptly, vaccine and medicine utilization ratio can reach more than 95% usually.

A method for manufacturing a container, which comprises the following steps in this order,

feeding, namely putting a tubular parison obtained by extrusion into a split mold while the parison is hot, wherein the tubular parison is provided with a plurality of synthetic resin layers which are divided into a synthetic resin outer layer and a synthetic resin inner layer;

the second step of closed mold forming, namely, firstly closing the split mold and extruding the tubular parison to form a waist part by the split mold; then introducing compressed air into the inner cavity at one end of the tubular parison to ensure that the tubular parison is blown to cling to the inner wall of the cavity of the split mold to form a cavity; introducing compressed air into the space between the synthetic resin outer layer and the synthetic resin inner layer at the other end of the tubular parison to ensure that the tubular parison is blown and tightly attached to the inner wall of the cavity of the split mold;

according to the actual working condition requirements, the contents can be filled into the containing cavity, or the contents do not need to be filled;

and thirdly, tail sealing, namely, a sealing block corresponding to the other end of the tubular parison is arranged in the split mold, the tail sealing block moves, and the sealing block extrudes the other end of the tubular parison to seal the other end of the tubular parison to form an air chamber.

And fourthly, demolding, namely cooling the blown tubular parison and demolding to obtain a semi-finished container product, wherein the semi-finished container product comprises a container finished product part and a redundant part.

And fifthly, cutting off redundant parts in the semi-finished product of the container to obtain the container.

In the second step, the waist is formed first, and then the tubular parison is blown, so that the inner layer of the synthetic resin can be bonded together by controlling the wall thickness of the tubular parison, thereby preventing the leakage of the contents, and simultaneously preventing the inner layer of the synthetic resin and the outer layer of the synthetic resin from being bonded together, thereby ensuring that the gas flows through between the inner layer of the synthetic resin and the outer layer of the synthetic resin at the waist. A tail press-sealing step of bonding the synthetic resin inner layer and the synthetic resin outer layer at the other end of the tubular parison together; therefore, the tail part press sealing step not only avoids gas leakage from the tail part to form an air chamber, but also eliminates an air hole missed by the other end of the blown tubular parison and forms a flat part, so that people can take the container conveniently and can stick a label required by a product conveniently.

Compared with the prior art, the container disclosed by the invention is used for storing vaccines or medicines, and the volume of the cavity is usually less than 25ml, namely the volume is far less than that of the existing plastic packaging container. After the container is connected with the needle head, the content in the containing cavity can be extruded out by extruding the side wall of the air chamber, and then the container can be directly injected into the body. The waist part has the function of flow limitation, so that airflow slowly enters a space between the outer layer and the inner layer of the synthetic resin in the thin wall of the cavity region, and the smoothness of injection is improved; after the injection is finished, the operator releases the side wall of the air chamber, the waist part has the function of intercepting, namely, the situation that air flows backwards into the air chamber from the space between the outer layer of the synthetic resin and the inner layer of the synthetic resin in the thin wall of the cavity region is avoided, and the possibility of in-vivo vaccine, medicine and blood backflow is reduced.

Drawings

Fig. 1 is a schematic perspective view of a container.

Fig. 2 is a front view of the container.

Fig. 3 is a schematic sectional structure view of a-a in fig. 2.

Fig. 4 and 5 are schematic sectional views of different states of the container in use.

FIG. 6 is a schematic view of the structure of the state in which the feeding step is performed.

Fig. 7 is a schematic configuration diagram of a state in which the mold-clamping molding step is performed.

Fig. 8 is a schematic view showing a state in which the step of filling the contents is performed.

FIG. 9 is a schematic view of the structure of the state of the cap.

Fig. 10 is a schematic view of the structure in a state where the mold is released.

In the figure, 1, a synthetic resin outer layer; 2. a synthetic resin inner layer; 3. an air chamber; 4. a cavity; 5. a convex strip; 6. a waist part; 7. a flat portion; 8. a needle head connecting part; 9. a chamber portion; 10. an air chamber portion; 11. a double-ended needle; 12. a tubular parison; 13. splitting the mold; 13a, pressing a sealing block; 14. semi-finished products of the container; 14a, a container finish portion; 14b, redundant portion.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, a container is used for storing a vaccine or a medicine. The container is a thin-walled member comprising a synthetic resin outer layer 1 and a synthetic resin inner layer 2 located inside the synthetic resin outer layer 1, the synthetic resin inner layer 2 being peelable from inside the synthetic resin outer layer 1. The synthetic resin outer layer 1 is made of PP or PETG; the inner layer 2 of synthetic resin is a multilayer structure, and at least one layer is made of EVOH. The materials of the synthetic resin inner layer 2 from inside to outside are LDPE, adhesive and EVOH in turn, or the materials of the synthetic resin inner layer 2 from inside to outside are LDPE, adhesive, EVOH, adhesive and LLDPE in turn.

The container has a gas chamber portion 10 and a chamber portion 9, the gas chamber portion 10 having a gas chamber 3 for storing gas therein, and the chamber portion 9 having a chamber 4 for storing contents therein. The air chamber 3 is formed between the outer layer 1 of the synthetic resin of the thin wall and the inner layer 2 of the synthetic resin, so that one side region of the side wall of the air chamber 3 is softer relative to the other side region, and the thin wall of the air chamber 3 region is provided with a plurality of convex strips 5, so that the friction force between the fingers of people and the container can be improved, and the air chamber 3 can be easily crushed by people. The cavity 4 is arranged on the inner side of the thin-wall synthetic resin inner layer 2, so that the EVOH layer effectively protects the contents and prolongs the shelf life of the contents.

The area of the thin wall between the air chamber 3 and the cavity 4 is a waist part 6 which contracts inwards, and the synthetic resin inner layer 2 in the area of the waist part 6 is bonded together to avoid the leakage of the content into the air chamber 3; the synthetic resin inner layer 2 and the synthetic resin outer layer 1 are not bonded together, so that when the thin wall of the air chamber 3 region is extruded, gas can force the synthetic resin outer layer 1 of the waist portion 6 region to deform, a gas passing gap is formed between the synthetic resin inner layer 2 and the synthetic resin outer layer 1, and the gas enters the space between the synthetic resin outer layer 1 and the synthetic resin inner layer 2 in the thin wall of the cavity 4 region through the gap.

The thin-walled end portion is a flat portion 7, and the air chamber 3 is located between the waist portion 6 and the flat portion 7. The flat part 7 seals one end of the air chamber 3 to prevent gas leakage, and the flat part 7 is convenient for people to take the container and is convenient for sticking labels.

The other end of the thin wall is a needle head connecting part 8; i.e. a part of the thin wall in the region of the cavity 4 is a needle connecting part 8, which facilitates the installation of the needle on the container and the communication of the needle with the cavity 4. The needle head connecting part 8 is cylindrical, the synthetic resin inner layer 2 at the needle head connecting part 8 is not easy to peel off from the synthetic resin outer layer 1, so that the needle head can simultaneously puncture the synthetic resin outer layer 1 and the synthetic resin inner layer 2, and the possibility of leakage of contents through a gap between the outer wall of the needle head and the thin wall is obviously reduced.

As shown in fig. 4 and 5, the cavity 4 is filled with a medicine, and the cavity 4 is filled with the medicine, so that the functions and advantages of the components are further described by explaining the process of directly injecting the medicine into the body. Firstly, a double-ended needle 11 is selected, a connecting seat is fixedly connected outside the double-ended needle 11, the connecting seat is sleeved on a needle head connecting part 8, in the process, the needle head penetrates through the end wall of the needle head connecting part 8, and the needle head is communicated with the accommodating cavity 4. Then, the other end of the double-ended needle 11 is inserted into the body. Then, the thin wall of the air chamber 3 region is extruded, and the air enters the space between the synthetic resin outer layer 1 and the synthetic resin inner layer 2 in the thin wall of the cavity 4 region through the air passing gap between the synthetic resin outer layer 1 and the synthetic resin inner layer 2 in the waist part 6; the synthetic resin inner layer 2 in the region of the cavity 4 is subjected to increased pressure, the synthetic resin inner layer 2 gradually shrinks and collapses, the medicine is discharged from the double-ended needle 11, and the air chamber 3 also gradually shrinks and collapses. The thin wall of the region of the air chamber 3 is continuously pressed until the desired volume of the drug is expelled. Finally, the double-ended needle 11 is pulled out of the body.

The above-mentioned container manufacturing method is carried out in the following sequence steps, the first step is to supply, as shown in fig. 6, the extruded tubular parison 12 is placed in the split mold 13 while it is hot, the tubular parison 12 has a plurality of layers of synthetic resin, the number of layers and the material of each layer in the tubular parison 12 are the same as the number of layers and the material of each layer of the thin wall in the container; the multilayer synthetic resin layer is thus also divided into a synthetic resin outer layer 1 and a synthetic resin inner layer 2.

A second step of closed-die forming, in which the split die 13 is closed, and as shown in fig. 7, the split die 13 extrudes the tubular parison 12 to shrink the tubular parison 12 inwardly to form the waist portion 6; the split mold 13 has a press-seal piece 13a corresponding to the other end of the tubular parison 12, and the press-seal piece 13a is driven to move so that the other end of the tubular parison 12 is pressed by the press-seal piece 13a while the other end of the tubular parison 12 is not closed, thereby ensuring that the blow pin is inserted between the outer synthetic resin layer 1 and the inner synthetic resin layer 2. Then, introducing compressed air into the inner cavity at one end of the tubular parison 12 to blow the tubular parison 12 to be tightly attached to the inner wall of the cavity of the split mold 13 to form a cavity 4; and a blowing needle is inserted between the synthetic resin outer layer 1 and the synthetic resin inner layer 2 at the other end of the tubular parison 12 and compressed air is introduced into a space between the synthetic resin outer layer 1 and the synthetic resin inner layer 2 at the other end of the tubular parison 12 to blow the tubular parison 12 to be closely attached to the inner wall of the cavity of the split mold 13, and air in the synthetic resin inner layer 2 at the other end of the tubular parison 12 can be smoothly discharged in the process. Air ducts may also be used to penetrate the space of the inner layer 2 of synthetic resin from the other end of the tubular parison 12 before closing the mould, which is more advantageous for the evacuation of air. Finally, filling the content into the cavity 4, as shown in fig. 8; depending on the circumstances, the filling of the contents may also be dispensed with.

And a third step of tail sealing, as shown in fig. 9, driving the tail sealing block to move again, wherein the sealing block extrudes the other end of the tubular parison 12, so that the other end of the tubular parison 12 is sealed to form the air chamber 3. A portion of the tubular parison 12 is simultaneously press-sealed during this step.

A fourth step of demoulding, illustrated in fig. 10, the blown tubular parison 12 is cooled and then demoulded, obtaining a semi-finished container 14, the semi-finished container 14 comprising a finished container portion 14a and an excess portion 14 b.

The fifth step cuts off the excess portion 14b of the container blank 14 to obtain a container.

Claims

1. A container comprises a thin wall, and is characterized in that the thin wall is internally provided with an air chamber (3) for storing gas and a containing cavity (4) for storing contents, and a waist part (6) which is positioned between the air chamber (3) and the containing cavity (4) and shrinks towards the inner side is arranged in the thin wall; the thin wall of the cavity (4) region comprises a synthetic resin outer layer (1) and a synthetic resin inner layer (2) positioned on the inner side of the synthetic resin outer layer (1), and the synthetic resin inner layer (2) can be peeled from the inner side of the synthetic resin outer layer (1); when the thin wall of the air chamber (3) region is extruded, gas can enter between the synthetic resin outer layer (1) and the synthetic resin inner layer (2) in the thin wall of the cavity (4) region through the waist (6).

2. Container according to claim 1, characterized in that the inner layer (2) of synthetic resin in the waist (6) is bonded together, the inner layer (2) of synthetic resin being separable from the outer layer (1) of synthetic resin.

3. Container according to claim 1, characterized in that the air chamber (3) is located between a thin-walled inner layer (2) of synthetic resin and an outer layer (1) of synthetic resin.

4. A container according to claim 1 or 2 or 3, characterized in that the thin-walled end portion is a flat portion (7), the air chamber (3) being located between the waist portion (6) and the flat portion (7).

5. A container according to claim 1 or 2 or 3, characterized in that the other end of the thin wall is a needle connection (8).

6. Container according to claim 5, wherein the needle connection (8) is cylindrical.

7. A container according to claim 1 or 2 or 3, characterized in that the inner synthetic resin layer (2) is of multilayer structure, at least one layer being of EVOH.

8. A method of manufacturing a container according to any one of claims 1 to 7, wherein the method of manufacturing the container is performed in the following sequential steps,

a first step of feeding, namely, putting a tubular parison (12) obtained by extrusion into a split mold (13) while the parison is hot, wherein the tubular parison (12) is provided with a plurality of synthetic resin layers which are divided into a synthetic resin outer layer (1) and a synthetic resin inner layer (2);

the second step of closed die forming, namely, firstly closing the split die (13), extruding the tubular parison (12) by the split die (13) to ensure that the tubular parison (12) contracts inwards to form a waist part (6); then introducing compressed air into the inner cavity at one end of the tubular parison (12) to ensure that the tubular parison (12) is blown to cling to the inner wall of the cavity of the split mold (13) to form a cavity (4); compressed air is introduced into the space between the synthetic resin outer layer (1) and the synthetic resin inner layer (2) at the other end of the tubular parison (12) to ensure that the tubular parison (12) is blown and attached to the inner wall of the cavity of the split mold (13);

thirdly, tail part press sealing, wherein a press sealing block (13 a) corresponding to the other end part of the tubular parison (12) is arranged in the split mold (13), the tail part press sealing block moves, and the press sealing block extrudes the other end part of the tubular parison (12) to press seal the other end part of the tubular parison (12) to form an air chamber (3);

a fourth step of demoulding, in which the blown tubular parison (12) is cooled and then demoulded to obtain a semi-finished container product (14), the semi-finished container product (14) comprising a finished container part (14 a) and an excess part (14 b);

and a fifth step of cutting off the redundant part (14 b) of the semi-finished product (14) of the container to obtain the container.

9. The container manufacturing method according to claim 8, wherein, in the second step, the driving pinch-off block (13 a) is moved, and the other end portion of the tubular parison (12) is pinched off by the pinch-off block (13 a).

10. Method for manufacturing a container according to claim 8, wherein in the second step the contents are poured into the receptacle (4).