TWI718854B - Paper-plastic cup lid with double clip structure and forming method - Google Patents

Abstract

The invention relates to a paper-plastic cup lid structure formed by thermal plastics pulp, in particular to a paper-plastic cup lid with a double clip structure and a forming method thereof. The middle of the paper-plastic cup lid protrudes upward with a contour part, and the paper-plastic cup lid There is a side wall extending downwards around the cup lid, and the outer mold and the inner mold are used to clamp the two ends of the paper-plastic cup lid, and a buckle module is arranged on the outside of the side wall, and the buckle module faces the paper-plastic cup. A buckle forming unit is provided in the direction of the cup lid, and a bead is further provided below the buckle module. When the buckle module presses the paper-plastic cup lid, the buckle forming unit cooperates with the inner mold and is positioned on the sidewall. A buckle portion is formed, and the bead squeezes the lower edge of the rib portion to bend to form a buckle hook, thereby obtaining the double buckle structure that strengthens the combination effect of the paper-plastic cup lid and the cup.

Description

Paper-plastic cup lid with double clip structure and forming method

The invention belongs to a paper-plastic cup lid, in particular to a paper-plastic cup lid thermally molded from pulp, on which a unique double clip structure and a forming method are arranged.

Disposable cups are disposable containers that are used and discarded, which provide convenient work for people to take beverages in daily life. Considering cost and strength, the original disposable cup is made of plastic. The advantage of plastic material is that it can still provide enough strength in a very light and thin state, and provide convenience for short-term use. However, plastic materials cannot be decomposed naturally, and incineration will produce toxins, which are a serious threat to the environment and ecology. Therefore, they have become the materials used by many countries, especially disposable cups or tableware, because waste is generated quickly and quickly. It must be excluded to maintain the long-term development of the earth's environment.

Then, with the regulation of laws and regulations, most of the disposable cups provided by the store are made of paper materials. The paper cups are easy to dispose of after being discarded, and can also be recycled and reused, which is helpful to environmental protection. The shortcomings of paper cups in the past are that they are not strong enough and easily soften in contact with beverages, causing beverages to ooze or leak. However, with the maturity of technology, they are now quite popular products.

Along with the use of paper cups, cup lids are also indispensable products to cover the mouth of the cup to prevent beverages from leaking out. The material of the lid is also like a cup. In terms of cost, strength and use, plastic cup lids are still being used in large quantities. Not only plastic cups, but also paper cups will also be sealed with plastic lids, causing great harm to environmental protection.

For this reason, there are still many people in the industry who are working tirelessly and actively engaged in the research, development and production of paper cup lids, hoping to completely replace plastic cup lids and achieve a complete matching of paper cups and paper cup lids.

To improve the lid, it is necessary to start with the structural characteristics of the existing lid. In order to combine with the cup for stability, the conventional lid will be provided with a flange on the periphery of the cup opening, and then the conventional lid will be provided with a relative position. The buckle part makes the buckle part buckle the flange to complete the combination of the cup cover and the cup. In this way, the flange should be as thick as possible to obtain a higher supporting force. Therefore, many paper cups seen on the market, the flange of the cup mouth is mostly a structure with an arc-shaped cross-section, which is opposite to that of paper cups. The buckle part of the cover also has a similar shape, and the thick flange and the buckle part are used to provide the best coupling state.

However, to obtain a paper cup with a perfect arc-shaped flange, high-quality cardboard must be glued layer by layer. These cardboards are made of fresh wood fiber, that is, a large amount of wood must be cut off for production, which is not conducive to Ecological balance, and increase production costs.

To achieve better environmental protection effects, it is best for paper cups and paper cup lids to use waste to generate pulp, such as bagasse, and then mold and heat press the pulp into so-called paper-plastic cups and lids. However, the paper-plastic cup cannot form a thick arc-shaped structure on the periphery of the cup mouth, and can only generate a thinner plate-like flange. Therefore, the conventional paper-plastic cup lid cannot effectively buckle the mouth of the paper-plastic cup, and it is easy Cause accidental leakage of beverages.

In addition, the conventional paper-plastic cup lid has poor heat insulation effect, and users are prone to accidents caused by touching the paper-plastic cup lid; or, with the restricted use of plastic straws, many people have become accustomed to direct contact. The drink is sucked by the lid on the lid, but it is also possible that the paper is touched by the lips Burns caused by plastic cup lid.

In addition, in order to save storage space and facilitate transportation, when people buy several cups of beverages, they are used to stacking the beverages one by one. However, the shape of the conventional paper-plastic cup lid is not conducive to the stacking of cups, and it is easy to cause dumping. Accident; or, simply take another paper plastic bag and pack each drink separately; therefore, the use of plastic bags has been increased unknowingly, which has a negative impact on environmental protection.

It can be seen that the conventional paper-plastic cup lid structure is still lacking, rather than the best design, and it is urgent to improve it.

The main purpose of the present invention is to provide a paper-plastic cup lid with a double buckle structure, which includes a buckle part buckled on the mouth end of the cup, and a hook formed by bending under the buckle part. The buckle hook and the buckle part doubly buckle the mouth end of the cup to obtain a more complete combination effect of the paper-plastic cup lid and the cup.

Another object of the present invention is to provide a paper-plastic cup lid with a reinforced structure. The upper surface of the paper-plastic cup lid is provided with a double wall surface, which not only strengthens the strength of the paper-plastic cup lid, but also improves the heat insulation effect and avoids users scald.

Another object of the present invention is to provide a paper-plastic cup lid that is convenient to use. The top surface of the paper-plastic cup lid is provided with a storage slot, the size of the storage slot is the same as the bottom of the cup, and multiple cups can be stacked in layers. In a single plastic bag, the use of plastic bags is reduced, and storage or transportation is convenient.

A paper-plastic cup lid with a double buckle structure that can achieve the aforementioned purpose, the paper The plastic cup lid is thermoformed from paper pulp to cover the periphery of the cup opening. The middle of the paper-plastic cup lid has a contour part protruding upwards, and the paper-plastic cup lid has a side wall extending downwards around it. The edge clamps the periphery of the cup opening from the outside to the inside, and the flange part is protrudingly provided with a buckle part for clamping the flange extending from the periphery of the cup opening to stabilize the paper-plastic cup lid and the The combination of the cup; and the lower edge of the rib portion below the buckle portion is bent toward the middle direction of the paper-plastic cup lid to form a buckle, and the buckle is stopped under the flange to form the buckle and the buckle The part double buckles the periphery of the cup mouth to obtain a more complete combination effect of the paper-plastic cup lid and the cup.

The aforementioned buckle hook is formed by directly bending a part of the rib part so that the height of the buckle hook is close to the buckle part. When the buckle part clamps the flange, the buckle hook can buckle the flange at the same time.

Furthermore, at least three hooks are provided, and they are equally angled on the circumference of the rib.

The buckle portion and the buckle hook are provided with more than one at different heights of the rib portion, so that when any one of the buckle portions or the buckle hook is released, the other buckle portions or the buckle hook can still be used. The fastening function of the paper-plastic cup lid is achieved.

The buckle hook is straight or slightly upward and buckles below the flange.

The contour part of the paper-plastic cup lid is provided with one or more thickened walls, and the thickened wall increases the strength and heat insulation effect of the paper-plastic cup lid.

In addition, the top surface of the contour part of the paper-plastic cup lid is provided with a storage slot, the size of the storage slot is the same as the bottom of the cup, and a plurality of cups can be stacked in layers for convenient storage or transportation.

In order to obtain the aforementioned paper-plastic cup lid, the present invention further provides a method for forming the paper-plastic cup lid. The paper-plastic cup lid is thermoformed from paper pulp, and the paper-plastic cup lid is covered with an outer mold. The inside of the cup lid contains an inner mold, and the shape of the outer mold and the inner mold exactly match the paper-plastic cup lid The paper-plastic cup cover is provided with a buckle module on the outside of the rib portion, the buckle module is provided with a buckle forming unit facing the direction of the paper-plastic cup lid, when the buckle module presses the paper-plastic cup lid When the buckle forming unit cooperates with the inner mold to form the buckle portion on the rib portion, a bead is further provided below the buckle module, and the bead presses the lower edge of the rib portion to bend to form the Deduction.

In the foregoing method, the bead is arranged in a partial section of the buckle module, so that the molded paper-plastic cup lid is formed with the buckle only in a partial area.

Or, the pressure bar is separated from the buckle module, so that the buckle module generates the buckle first, and then pushes the pressure bar to bend the hook.

100‧‧‧Paper Plastic Cup Lid

110‧‧‧Contour

120‧‧‧Belt

130‧‧‧Snap part

140‧‧‧hook

150‧‧‧Thickened wall

160‧‧‧storage slot

170‧‧‧Gap

200‧‧‧Cup

210‧‧‧Flange

310‧‧‧Outer mold

320‧‧‧Inner mold

330‧‧‧Snap Module

340‧‧‧Snap forming unit

350‧‧‧Laminate

Figure 1 is a perspective view of the structure of the paper-plastic cup lid of the present invention before being combined with the cup;

Figure 2 is a perspective view of the structure of the paper-plastic cup lid after being combined with the cup;

Figure 3 is a cross-sectional view of the structure of the paper-plastic cup lid after being combined with the cup;

Figure 3A is an enlarged view of the buckled part of the paper-plastic cup lid of Figure 3;

Figure 4 is a perspective view of the inner structure of the paper-plastic cup lid;

Figure 5 is a plan view of the inner structure of the paper-plastic cup lid;

Figure 6 is a plan view of a modified example of the inner structure of the paper-plastic cup lid;

Figure 7 is a perspective view of the layered stacking action of the paper-plastic cup lid applied to the cup;

Figure 8 is a schematic diagram of the mold closing action of the paper-plastic cup lid forming step; and

Fig. 9 is a schematic diagram of the mold opening action in the forming step of the paper-plastic cup lid.

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

Please refer to Figures 1 to 5, the present invention is a paper-plastic cup lid with a double buckle structure, which has a paper-plastic cup lid 100, the paper-plastic cup lid 100 is made of paper pulp generated from waste for thermoplastic It is formed and used in conjunction with a cup 200. The cup 200 is also made of paper and plastic, but is not limited, and can be a plastic cup or a paper cup pasted cup, or other types of cups.

The paper-plastic cup cover 100 is used to cover the periphery of the cup 200. The paper-plastic cup cover 100 has a contour portion 110 protruding upward in the middle. The shape of the contour portion 110 is not limited, as long as it can cover the cup 200 cup opening is sufficient; the paper-plastic cup lid 100 extends downwardly with a side wall 120, which clamps the periphery of the cup opening from the outside to the inside, so that the paper-plastic cup lid 100 and the cup 200 combination; the rib portion 120 is protrudingly provided with a buckle portion 130, the periphery of the cup mouth has an outwardly extending flange 210, so that the buckle portion 130 clamps the flange 210 that extends from the periphery of the cup mouth, In order to stabilize the combination of the paper-plastic cup cover 100 and the cup 200.

In addition to the buckle portion 130, the lower edge of the rib portion 120 below the buckle portion 130 is bent toward the middle direction of the paper-plastic cup cover 100 to form a hook 140, and the hook 140 is attached to the paper-plastic cup cover. 100 will stop under the flange 210 when it is covered to form a double buckle structure of the hook 140 and the buckle portion 130, and the flange 210 can be buckled tightly and stably to obtain a more complete The combined effect of the paper-plastic cup cover 100 and the cup 200.

In fact, in order to facilitate production and use, the hook 140 needs to be spread over all the positions of the rib portion 120, but a part of the rib portion 120 is directly bent and formed; the main point is, The height of the hook 140 is approximately equal to the height of the buckle portion 130, that is, when the buckle portion 130 clamps the flange 210, the hook 140 can buckle the flange 210 at the same time, because the buckle portion 130 Usually it only touches the outermost end of the flange 210, so the clamping force is limited, and the hook 140 can penetrate into the inner area of the flange 210, and cooperate with the buckle portion 130 to form a double buckle clip, so more Good clamping effect.

There are at least three hooks 140, and they are distributed at equal angles on the circumference of the rib 120 to evenly provide clamping force to maintain the stability of the combination. Of course, four or other numbers are common (Figure 6). Both can perform the same function.

In addition, in accordance with the shape of the flange 210 of the cup 200, the clasp 140 can be flat against the bottom of the flange 210, or the clasp 140 can be slightly upward to buckle the bottom of the flange 210 to provide more For stable support.

Furthermore, the buckle portion 130 and the buckle hook 140 are basically provided at the upper and lower positions of the rib portion 120, so that they can clamp the flange 210 up and down to obtain a double buckle function; and the The buckle portion 130 and the buckle hook 140 can be further provided with more than one at different heights of the rib portion 120, so that when any one of the buckle portion 130 or the buckle hook 140 is loosened for some reason, it can still be The other buckle portion 130 or the buckle 140 achieves the fastening function of the paper-plastic cup lid 100.

Please refer to Figures 1 and 2 again. The present invention further provides a strengthening mechanism for the paper-plastic cup lid 100 by providing a thickened wall 150 on the contour portion 110 of the paper-plastic cup lid 100 to form a thickened The paper-plastic cup lid 100 increases the strength and heat insulation effect of the paper-plastic cup lid 100, so that users will not burn their hands due to touching the paper-plastic cup lid 100, or cause damage to the paper-plastic cup lid 100. The accidental scalding of the lips when the lid 170 sucks a drink makes the operation safer and smoother; the thickened wall 150 can be provided with one or more than one to form a double wall or a multi-layer wall to achieve better strength and Thermal insulation effect.

As shown in FIG. 7, considering storage or transportation, the top surface of the contour portion 110 of the paper-plastic cup cover 100 is provided with a storage slot 160. The size of the storage slot 160 is the same as the bottom of the cup 200. A plurality of cups 200 can be stored. Stacked layer by layer, and then only a small amount of plastic bags can be packaged and carried, which reduces the use of plastic bags and is more convenient for storage or transportation.

Referring to Figures 8 and 9, in order to obtain a high-quality paper-plastic cup lid 100 structure, the present invention also provides a method for forming a paper-plastic cup lid 100 with a double clip structure. 100 is thermoformed from paper pulp, and the paper-plastic cup lid 100 is covered with an outer mold 310, and the paper-plastic cup lid 100 contains an inner mold 320. The shapes of the outer mold 310 and the inner mold 320 are just right. It is consistent with the paper-plastic cup cover 100.

Then, in order to form the buckle portion 130 and the buckle hook 140 that are the characteristics of the present invention, a buckle module 330 is provided on the outer side of the rib portion 120 extending around the paper-plastic cup cover 100, and the buckle module 330 faces the paper A buckle forming unit 340 is provided in the direction of the plastic cup cover 100. When the buckle module 330 presses the paper-plastic cup cover 100, the buckle forming unit 340 cooperates with the inner mold 320 to form a side wall 120 The buckle portion 130; in addition, a bead 350 is further provided under the buckle module 330, and the bead 350 squeezes the lower edge of the rib portion 120 to bend to form the clasp 140.

In addition, in order to realize that the aforementioned buckle 140 is directly bent and formed by part of the rib portion 120, during production, the bead 350 is arranged in a partial section of the buckle module 330, so that the formed paper-plastic cup lid The hook 140 is formed only in a part of the area 100.

The pressing bar can be combined under the buckle module 330, and the buckle portion 130 and the buckle hook 140 can be generated in a single feed, or the pressing bar 350 and the buckle module 330 are arranged separately to make the buckle module 330 first produces the buckle portion 130, and then pushes the bead 350 to bend out The hook 140 can be operated more flexibly in this way.

The above are only preferred embodiments of the present invention, and are not used to limit the scope of implementation of the present invention; if the present invention is modified or equivalently replaced without departing from the spirit and scope of the present invention, it shall be covered by the scope of the patent application of the present invention. In the scope of protection.

100‧‧‧Paper Plastic Cup Lid

110‧‧‧Contour

120‧‧‧Belt

140‧‧‧hook

150‧‧‧Thickened wall

170‧‧‧Gap

200‧‧‧Cup

210‧‧‧Flange

Claims (10)

A paper-plastic cup lid with a double clip structure. The paper-plastic cup lid is thermoformed from pulp to cover the periphery of the cup opening. The middle of the paper-plastic cup lid has a contour part protruding upward. There is a side wall extending downwards around the plastic cup lid. The side wall clamps the circumference of the cup opening from the outside to the inside. The side wall is protrudingly provided with a buckle part for clamping the circumference of the cup opening The extended flange stabilizes the combination of the paper-plastic cup lid and the cup; and the lower edge of the side wall portion below the buckle portion is bent toward the middle of the paper-plastic cup lid to form a buckle, and the buckle stops Below the flange, the buckle hook and the buckle portion are formed to double buckle the periphery of the cup mouth, so as to obtain a more complete combination effect of the paper-plastic cup lid and the cup. According to claim 1, the paper-plastic cup lid with a double clasp structure, wherein the clasp is formed by directly bending a part of the rib portion, so that the clasp is close to the clasp portion, when the card When the buckle clamps the flange, the hook can buckle the flange at the same time. According to claim 2, the paper-plastic cup lid with a double clasp structure, wherein at least three clasps are provided, and they are equally angled on the circumference of the rib. According to claim 1, the paper-plastic cup lid with a double clasp structure, wherein the clasp is straight or slightly upward and buckles below the flange. The paper-plastic cup lid with a double clasp structure according to claim 1, wherein the clasp portion and the clasp are provided with more than one at different heights of the rib portion, so that either the clasp portion or the clasp When the clasp is loosened, the clasp part or the clasp can still achieve the clasping function of the paper-plastic cup lid. The paper-plastic cup lid with a double clip structure according to claim 1, wherein the contour portion of the paper-plastic cup lid is provided with one or more thickened walls, and the thickened wall increases the paper-plastic cup lid The strength and heat insulation effect. The paper-plastic cup lid with a double clip structure according to claim 1, wherein the top surface of the contour portion of the paper-plastic cup lid is provided with a storage slot, the size of the storage slot is the same as the bottom of the cup, Stack multiple cups layer by layer to facilitate storage or transportation. A method for forming a paper-plastic cup lid with a double clip structure. The paper-plastic cup lid is thermoformed from pulp, and the paper-plastic cup lid is covered with an outer mold, and the inside of the paper-plastic cup lid is accommodated There is an inner mold, and the shapes of the outer mold and the inner mold are exactly the same as the paper-plastic cup lid; it is characterized in that the paper-plastic cup lid is extended with a side wall portion for setting the double clip structure, and the side wall portion A buckle module is provided on the outside, and the buckle module is provided with a buckle forming unit facing the direction of the paper-plastic cup cover. When the buckle module presses the paper-plastic cup cover, the buckle forming unit cooperates with the inner mold. A buckle part is formed on the side wall, and a bead is further provided under the buckle module. The bead presses the lower edge of the side wall to bend to form a buckle hook. The method for forming a paper-plastic cup lid with a double buckle structure according to claim 8, wherein the bead is arranged in a partial section of the buckle module, so that the formed paper-plastic cup lid is formed only in a partial area There should be a hook. The method for forming a paper-plastic cup lid with a double buckle structure according to claim 8, wherein the bead is separated from the buckle module, so that the buckle module generates the buckle first, and then pushes the bead Bend out the hook.

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