Composite Packaging Container Molding Method

Abstract

A method for forming a composite packaging container includes the following steps: immersing a plurality of concave molds into a pulp; each concave mold has a cavity and an air cavity, with several air holes connecting the cavity and the air cavity; drawing air through the cavity and air holes to vacuum-adsorb the pulp onto the inner side of the cavity; inserting a core into the cavity to squeeze the pulp, filter out excess water, shape, and heat and dry the pulp to form a bottle body and a bottle bottom; the bottom of the bottle body has a bottom hole to hold the bottom in place, and the top of the bottle body is removed to form a bottle mouth hole; heating a thermoplastic preform; using a blow molding machine to move the bottle bottom and preform, allowing the preform to pass through the bottle mouth hole and insert into the bottle body; two molds approach and clamp the bottle body to restrict its outer side; a blow molding machine descends and inserts into the preform, blowing air to make it expand and adhere to the inner side of the bottle body and bottom to form an inner bottle, thereby completing a composite packaging container.

Description

[Technical Field]

[0001] This invention relates to a method for molding composite packaging containers, and more particularly to a method for molding composite packaging containers that can combine paper and thermoplastic materials to produce composite packaging containers. [Previous Technology]

[0002] Note that conventional containers have the disadvantage of using too much thermoplastic material, making it difficult to achieve the plastic reduction target. Therefore, it is necessary to combine other environmentally friendly materials to manufacture containers. In addition, for subsequent recycling, the two materials also need to be able to be quickly separated to cope with recycling work.

[0003] Therefore, the inventor, in view of this, conceived the idea of ​​the invention, and designed it based on many years of experience. After extensive research, sample testing, and multiple revisions and improvements, the inventor launched the present invention.

[0004] The present invention provides a method for molding composite packaging containers, which has the effect of producing composite packaging containers by combining paper and thermoplastic materials, and can obtain the material advantages of both materials and achieve the plastic reduction target.

[0005] This invention provides a method for forming a composite packaging container, comprising the following steps: immersing a plurality of concave molds into a pulp, each concave mold having a cavity and an air cavity, with a plurality of air holes communicating between the cavity and the air cavity; the concave molds drawing air through the air cavity and the air holes to vacuum-adsorb the pulp onto the inner side of the cavity; inserting a mold core into the cavity to squeeze the pulp, filter out excess water, shape it, and heat and dry the pulp to form a bottle body and a bottle bottom, wherein the bottom of the bottle body has a... A bottom hole is formed, and the top of the bottle body is removed to form a mouth hole. The bottom of the bottle is inserted into the bottom hole. A preform of thermoplastic material is heated, and a blow molding machine is used to move the bottom of the bottle and the preform so that the preform passes through the mouth hole and is inserted into the bottle body. The preform forms a mouth at the mouth hole. A two-part mold is used to clamp the bottle body and restrict its outer side. A blow molding machine is lowered and inserted into the preform to blow air, causing it to expand and adhere to the inner side of the bottle body and the bottom of the bottle to form an inner bottle, thereby completing a composite packaging container.

[0006] In another embodiment, the difference is that a plurality of punches are immersed in a pulp. The punch has a mold body with an air extraction channel inside. The mold body has a plurality of adsorption holes. The punches draw air through the air extraction channel and the adsorption holes to vacuum adsorb the pulp onto the surface of the mold body. A forming part is recessed with a forming groove. The punches are inserted into the forming groove to squeeze and filter out excess water from the pulp, shape it, and heat and dry the pulp to form a bottle body and a bottle bottom.

[0007] The main objective of this invention is to make the pulp into the bottle body and the bottle bottom. After the bottle bottom is simply fitted into the bottom hole of the bottle body, the preform is preheated and then inserted into the bottle body by moving the blow molding machine. The preform is then blow-molded by blowing air using the blow molding machine to expand and adhere to the inner side of the bottle body and the bottle bottom to form the inner bottle. This allows for the composite of two materials. The paper bottle bottom and bottle body reduce the use of thermoplastic material and facilitate printing and labeling. When recycling, the paper bottle bottom and bottle body can be separated, thereby achieving separate recycling and utilization of the paper and separate recycling of the thermoplastic bottle mouth and the inner bottle. This facilitates easy separation and recycling for subsequent reuse. The selection and combination of composite materials in this composite packaging container can achieve better performance.

[0008] Other objects, advantages and novel features of the invention will become more apparent from the following detailed description and the accompanying drawings. [Simplified Explanation of the Diagram]

[0009] [Figure 1] is a perspective view of the composite packaging container of the present invention.

[0009] [Figure 2] is an exploded view of the composite packaging container of the present invention before molding.

[0009] [Figure 3] is a schematic diagram of the concave mold of the present invention before it is immersed in the pulp.

[0009] [Figure 4] is a schematic diagram of the concave mold of the present invention after being immersed in pulp.

[0009] [Figure 5] is a schematic diagram of inserting the mold core into the die according to the present invention.

[0009] [Figure 6] is a schematic diagram of the forming of the bottle body and bottle bottom of the present invention.

[0009] [Figure 7] is a cross-sectional view of the completed bottle body of the present invention.

[0009] [Figure 8] is a schematic diagram of the opening in the bottle body of the present invention.

[0009] [Figure 9] is a cross-sectional view of the combination of the bottle body and the bottle bottom of the present invention.

[0009] [Figure 10] is a schematic diagram of the preform preheating of the present invention.

[0009] [Figure 11] is a schematic diagram of the preform, body, and bottom of the bottle on a blow molding machine.

[0009] [Figure 12] is a schematic diagram of the preform of the present invention being placed inside the bottle body.

[0009] [Figure 13] is a schematic diagram of the bottle preform being inserted into the blow molding device of the present invention.

[0009] [Figure 14] is a schematic diagram of the mold clamping the bottle body of the present invention.

[0009] [Figure 15] is a schematic diagram of the blow molding of the preform of the present invention.

[0009] [Figure 16] is a cross-sectional view of the composite packaging container of the present invention.

[0009] [Figure 17] is a schematic diagram of the completed manufacturing of the composite packaging container of the present invention.

[0009] [Figure 18] is a schematic diagram of another dynamic operation of the blow molding machine of the present invention.

[0009] [Figure 19] is another schematic diagram of the dynamic sample gripper movement of the blow molding machine of the present invention.

[0009] [Figure 20] is another schematic diagram of the dynamic sample gripper movement of the blow molding machine of the present invention.

[0009] [Figure 21] is a schematic diagram of a punch being immersed in pulp according to another embodiment of the present invention.

[0009] [Figure 22] is a schematic diagram of inserting a punch into a die according to another embodiment of the present invention.

Implementation Method

[0010] To enable your review committee to have a better understanding of the purpose, features and effects of this invention, the following is a detailed description in conjunction with the [simple illustrations]:

[0011] First, please look at Figure 1 and Figure 2. The composite packaging container molding method of the present invention is used to manufacture a composite packaging container (10). The composite packaging container (10) is made by blow molding a preform (B) and attaching it to a bottle body (11) and a bottle bottom (12) through a composite packaging container molding method.

[0012] This invention provides a method for forming a composite packaging container, which includes the following steps:

[0013] As shown in Figures 3 and 4, a plurality of dies (20) are immersed in a pulp (A). Each die (20) has a cavity (21) and an air cavity (22). Several air holes (23) are connected between the cavity (21) and the air cavity (22). The die (20) draws air through the air cavity (22) and the air holes (23) to vacuum adsorb the pulp (A) onto the inside of the cavity (21). As shown in Figures 5 and 6 As shown, a mold core (30) is inserted into the mold cavity (21) to squeeze the pulp (A) to filter out excess water, shape it, and heat and dry the pulp (A) to form a bottle body (11) and a bottle bottom (12). As shown in Figures 7 to 9, the bottom of the bottle body (11) has a bottle bottom hole (111), and the top of the bottle body (11) is removed to form a bottle mouth hole (112). The bottle bottom (12) is inserted into the bottle bottom hole (111).

[0014] As shown in Figures 10 to 13, a preform (B) of thermoplastic material is heated, and a blow molding machine (40) is used to move the bottle bottom (12) and the preform (B) so that the preform (B) passes through the bottle opening (112) and is inserted into the bottle body (11). The preform (B) forms a bottle mouth (13) at the bottle opening (112). The two-part mold (50) approaches and clamps the bottle body (11) to restrict its outer side. As shown in Figures 13 to 17, a blow molding machine (60) is lowered and inserted into the preform (B) to blow air and make it expand and stick to the inner side of the bottle body (11) and the bottle bottom (12) to form an inner bottle (14), thereby completing a composite packaging container (10).

[0015] As shown in Figures 11 to 13, the present invention provides a method for forming a composite packaging container, wherein the blow molding machine (40) includes a first track (41) and a second track (42). A first tool (43) is provided on the first track (41), and the first tool (43) can vertically extend and retract a gripper (431). A second tool (44) slides horizontally on the second track (42), and the second tool (44) is provided with a push rod (441). The blow molding machine (40) uses the gripper (431) to hold the preheated preform (B) and pushes the bottle bottom (12) with the push rod (441). The second tool (44) slides horizontally on the second track (42) and coordinates with the vertical extension and retraction of the gripper (431) to perform alignment and movement so that the preform (B) passes through the bottle opening (112) and is inserted into the bottle body (11).

[0016] As shown in Figures 18 to 20, the present invention provides a method for forming a composite packaging container, wherein the blow molding machine (40) includes a first track (41) and a second track (42). A first tool (43) slides horizontally on the first track (41). The first tool (43) is provided with a gripper (431). A second tool (44) is provided on the second track (42). The second tool (44) can vertically extend and retract a push rod (441). The blow molding machine (40) uses the gripper (431) to hold the preheated preform (B) and pushes the bottle bottom (12) with the push rod (441). The first tool (43) slides horizontally on the first track (41) and moves vertically in conjunction with the push rod (441) to align and move the preform (B) through the bottle opening (112) and insert it into the bottle body (11).

[0017] The present invention provides a method for molding a composite packaging container, wherein the preform (B) can be made of petrochemical plastic or biodegradable plastic.

[0018] The present invention provides a method for molding a composite packaging container, wherein the preform (B) can be made of PEF, which is a preferred material for recycling. PEF (polyethylene furanoate) is 100% derived from plant-based materials and can be biodegraded like paper. It also produces fewer plastic microparticles and is more environmentally friendly.

[0019] Therefore, by using the composite packaging container molding method, the pulp (A) can be made into the bottle body (11) and the bottle bottom (12). After the bottle bottom (12) is simply fitted into the bottom hole (111) of the bottle body (11), the preform (B) is preheated and then inserted into the bottle body (11) by moving the blow molding machine (40). The preform (B) is then blown by the blow molding machine (60) to expand and attach the preform (B) to the inside of the bottle body (11) and the bottle bottom (12) to form the inner side. The bottle (14) can combine two materials. The paper bottle bottom (12) and the bottle body (11) can reduce the use of thermoplastic material and facilitate printing labels. When recycled, the paper bottle bottom (12) and the bottle body (11) can be separated to achieve separate recycling and utilization of paper, and the thermoplastic bottle mouth (13) and the inner bottle (14) can be recycled separately. It can be easily separated and recycled for subsequent reuse. The composite material selection and combination of the composite packaging container (10) can achieve better use effect.

[0020] In actual use, the composite packaging container (10) is not only more convenient to use but also more environmentally friendly. It greatly reduces the use of thermoplastic materials, making it easier to achieve the plastic reduction target. The bottle body (11) and the bottle bottom (12) save the amount of raw materials of the preform (B) to a certain extent, thus saving production costs.

[0021] The present invention provides a method for forming a composite packaging container, wherein the first track (41) and the second track (42) are magnetic levitation tracks, and the first tool (43) and the second tool (44) are suspended on the first track (41) and the second track (42) by means of magnetic control, thereby reducing the influence of friction.

[0022] The present invention provides a method for forming a composite packaging container, wherein the bottle body (11) is wide at the bottom and narrow at the top and is bell-shaped, and the bottle body (11) and the bottle bottom (12) are in a tight fit relationship, so that the bottle bottom (12) can be easily inserted into the bottle mouth hole (112) and prevented from moving further upward.

[0023] The present invention provides a method for forming a composite packaging container, wherein the bottle body (11) and the bottle bottom (12) are bonded together with adhesive.

[0024] As shown in Figure 8, the present invention provides a method for forming a composite packaging container, wherein at least one through hole (113) is formed on the side of the bottle body (11). As shown in Figure 15, the blow molding machine (60) is lowered and inserted into the preform (B) and blown to expand it so that it adheres to the inner side of the bottle body (11) and the bottle bottom (12) to form an inner bottle (14) and fills the through hole (113) to form a filling part (141).

[0025] As shown in Figure 21, this is another embodiment of the present invention. The difference lies in the manufacturing process of the bottle body (11) and the bottle bottom (12). A plurality of punches (70) are immersed in a pulp (A). The punch (70) has a mold body (71). The mold body (71) is provided with an air extraction channel (72). The mold body (71) has a plurality of adsorption holes (73). The punch (70) draws air through the air extraction channel (72) and the adsorption holes (73) to vacuum adsorb the pulp (A) onto the surface of the mold body (71). As shown in Figure 22, a forming part (80) is recessed with a forming groove (81). The punch (70) is inserted into the forming groove (81) and squeezes to filter out excess water from the pulp (A), shapes it, and heats and dries the pulp (A) to form a bottle body (11) and a bottle bottom (12).

[0026] The above description is only one preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention; that is, all equivalent changes and modifications made in accordance with the claims of the present invention should still fall within the scope of the present invention.

Claims

1. A method for forming a composite packaging container, comprising the following steps: immersing a plurality of concave molds into a pulp, wherein each concave mold has a mold cavity and an air cavity, and a plurality of air holes are connected between the mold cavity and the air cavity; the concave molds draw air through the air cavity and the air holes to vacuum adsorb the pulp onto the inner side of the mold cavity; inserting a mold core into the mold cavity to squeeze the pulp to filter out excess water, shape it, and heat and dry the pulp to form a bottle body and a bottle bottom; the bottom of the bottle body has a bottle bottom hole, and the top of the bottle body is removed to form a bottle mouth hole; and the bottle bottom is inserted into the bottle bottom hole. A thermoplastic preform is heated, and a blow molding machine is used to move the bottle bottom and the preform so that the preform passes through the bottle opening and is inserted into the bottle body. The preform forms a bottle mouth at the bottle opening. A two-part mold clamps the bottle body and restricts its outer side. A blow molding machine is lowered and inserted into the preform to blow air, causing it to expand and adhere to the inner side of the bottle body and the bottle bottom to form an inner bottle, thereby completing a composite packaging container.

2. A method for forming a composite packaging container, comprising the following steps: immersing a plurality of punches into a pulp, wherein each punch has a mold body, the mold body is provided with an air extraction channel, the mold body is provided with a plurality of adsorption holes, the punches draw air through the air extraction channel and the adsorption holes to vacuum adsorb the pulp onto the surface of the mold body, a forming part is recessed with a forming groove, the punches are inserted into the forming groove to squeeze and filter out excess water from the pulp, shape it, and heat and dry the pulp to form a bottle body and a bottle bottom, the bottom of the bottle body has a bottle bottom hole, and the top of the bottle body is removed to form a bottle mouth hole, and the bottle bottom is inserted into the bottle bottom hole; A thermoplastic preform is heated, and a blow molding machine is used to move the bottle bottom and the preform so that the preform passes through the bottle opening and is inserted into the bottle body. The preform forms a bottle mouth at the bottle opening. A two-part mold clamps the bottle body and restricts its outer side. A blow molding machine is lowered and inserted into the preform to blow air, causing it to expand and adhere to the inner side of the bottle body and the bottle bottom to form an inner bottle, thereby completing a composite packaging container.

3. The method for forming a composite packaging container as described in claim 1 or 2, wherein, The blow molding machine includes a first track and a second track. A first tool is provided on the first track, which can vertically extend and retract a gripper. A second tool slides horizontally on the second track, and the second tool is provided with a push rod. The blow molding machine uses the gripper to hold the preheated bottle preform, and uses the push rod to push the bottom of the bottle. The second tool slides horizontally on the second track and, in conjunction with the vertical extension and retraction of the gripper, aligns and moves the preform through the bottle opening and inserts it into the bottle body.

4. The method for forming a composite packaging container as described in claim 3, wherein, The first track and the second track are magnetic levitation tracks, and the first tool and the second tool are suspended on the first track and the second track by means of magnetic control.

5. The method for forming a composite packaging container as described in claim 1 or 2, wherein, The blow molding machine includes a first track and a second track. A first tool slides horizontally on the first track and is equipped with a gripper. A second tool is provided on the second track and can vertically extend and retract a push rod. The blow molding machine uses the gripper to hold the preheated bottle preform and uses the push rod to push the bottom of the bottle. The first tool slides horizontally on the first track and, in conjunction with the vertical extension and retraction of the push rod, aligns and moves the preform through the bottle opening and inserts it into the bottle body.

6. The method for forming a composite packaging container as described in claim 5, wherein, The first track and the second track are magnetic levitation tracks, and the first tool and the second tool are suspended on the first track and the second track by means of magnetic control.

7. A method for forming a composite packaging container as described in claim 1 or 2, wherein, The bottle body is wide at the bottom and narrow at the top, forming a bell shape, and the bottle body and the bottle bottom are in a tight fit relationship.

8. A method for forming a composite packaging container as described in claim 1 or 2, wherein, The side of the bottle body is further removed to form at least one through hole. The blow molding machine is lowered and inserted into the preform, and air is blown in to make it expand and adhere to the inner side of the bottle body and the bottom of the bottle to form an inner bottle and fill the through hole to form a filling part.

9. A method for forming a composite packaging container as described in claim 1 or 2, wherein, The preform can be made of petrochemical plastic or biodegradable plastic.

10. A method for forming a composite packaging container as described in claim 1 or 2, wherein, The preform can be made of PEF.

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