TW202233945A - Automatic demolding device capable of improving the integrity of the cup body when being demolded, and greatly improving the yield rate of the cup body - Google Patents

Abstract

An automatic demolding device is provided to manufacture a cup body that is formed from paper pulp, which comprises a first material receiving mold and a second material receiving mold that detachably fit each other. When one of the first material receiving mold and the second material receiving mold is moved away from the other from the fitting state, the first and second material receiving molds respectively push the cup body with jet air and suck the cup body with suction air, thereby smoothly separating the cup body from the second material receiving mold. As a result, in the process of alternate suction and release, the cup body can be assisted to be smoothly separated from the second material receiving mold, thereby improving the integrity of the cup body when being demolded, and greatly improving the yield rate of the cup body.

Description

Automatic demolding device

The present invention relates to a paper cup, in particular to an automatic demoulding device.

Referring to FIG. 1 , a conventional cup sleeve 11 disclosed in Patent Publication No. 201710157 of the Republic of China is mainly sleeved on the outer periphery of a beverage cup 12 , thereby achieving a thermal insulation effect with a multi-layer structure. However, due to the surface contact between the cup sleeve 11 and the beverage 12, the heat conduction speed is quite fast, especially when the beverage cup 12 is made of metal, glass, ceramic, or plastic material, the cup sleeve 11 still has a physical feel. It can be hot to the touch, therefore, the thermal insulation effect is limited.

Referring to FIG. 2 , in order to improve the aforementioned shortcomings, a conventional cup body 2 disclosed in Patent Publication No. 201210903 of the Republic of China mainly includes an upper connecting portion 21 and a lower connecting portion 22 that are mutually butted and form a closed structure. The upper connecting portion 21 includes a cup pattern 211 protruding on the outer peripheral surface, thereby achieving heat insulation effect.

However, as disclosed on pages 5 to 6 of the description of the patent case of the Republic of China Publication No. 201210903, the cup body 2 is formed by abutting the upper connecting portion 21 and the lower connecting portion 22, except that the upper connecting portion needs to be wound. In addition to the assembly procedure, when docking, the adhesion effect should also be considered. Importantly, before winding and docking the upper connecting portion 21, the upper connecting portion 21 also needs to be rolled to form the cup patterns 211, which is quite complicated in the process, not only time-consuming and labor-intensive, and higher cost.

Therefore, the purpose of the present invention is to provide an automatic demolding device capable of improving the integrity of the cup body during demolding and greatly improving the yield of the cup body.

Therefore, the automatic demolding device of the present invention is used to manufacture a cup body formed from pulp, the cup body includes a cup body, and the cup body has an inner surface defining a accommodating space and an outer surface opposite to the inner surface. , an outer convex portion formed on the outer surface, and a plurality of concave portions extending from the outer surface toward the inner surface direction, the automatic demolding device comprises a first detachable abutting against each other and defining a cavity unit A material receiving mold and a second material receiving mold.

The cavity unit is adapted to accommodate the cup.

The first splicing mold includes a first mold surface for contacting the outer surface of the cup body, bumps protruding from the first mold surface, and a first channel connected to the mold cavity unit , the second holes are used to generate suction airflow.

The second splicing mold includes a second mold surface contacting the inner surface of the cup body, several cavities recessed from the second mold mold surface, and several second holes connected to the mold cavity unit, the The cavities fit into the bumps, and the first holes are used to generate one of suction airflow and jet airflow.

The second feeding mold changes between a first mode and a second mode. In the first mode, the second holes generate suction airflow and can absorb the cup to move. In the second mode In the mode, one of the first parting die and the second parting die is moved away from the other from the butted state. At the same time, the second orifices generate jet air and push them away from the cup body. A hole generates suction airflow to adsorb the cup body, so that the cup body automatically falls off the second feeding die and is adsorbed on the first feeding die.

The effect of the present invention is: in the process of demolding, the cup body is pushed by the jet air flow, and the cup body is adsorbed by the suction air flow, so that the cup body can be smoothly separated from the second feeding mold.

Referring to FIG. 3 , FIG. 4 and FIG. 5 , an embodiment of the automatic demolding device 4 of the present invention is used to manufacture a cup body 3 formed from pulp. The cup body 3 includes a cup body 31 and a cup rim 32 . The cup body 31 has an inner surface 311 defining an accommodating space 310, an outer surface 312 opposite to the inner surface 311, a number of recesses 313 extending from the outer surface 312 toward the inner surface 311, and a number of recesses 313 formed in the inner surface 311. The outer convex portion 314 of the outer surface 312 and the inner convex portion 315 are formed on the inner surface 311 . Each of the convex portions 314 is formed between two adjacent concave portions 313 .

The automatic demolding device 4 includes a first feeding mold 41 and a second feeding mold 42 which are detachably coupled to each other and define a cavity unit 40 . The cavity unit 40 is used to accommodate the cup body 3 .

In this embodiment, the mold cavity unit 40 has a number of mold cavities arranged in an array, each of which is used to accommodate a cup body 3, but the number of the mold cavities is not limited to several, nor is it limited to an array The arrangement may also be one in other variations of this embodiment.

The first splicing mold 41 includes a first mold surface 411 for contacting the outer surface 312 of the cup body 31 , a number of protrusions 412 protruding from the first mold surface 411 , and a number of protrusions 412 connected to the mold The first channel 413 of the hole unit 40 . The first holes 413 are used to generate suction airflow.

The second feeding mold 42 includes a second molding surface 421 contacting the inner surface 311 of the cup body 31 , cavities 422 recessed from the second molding surface 421 , and a cavity unit connected to the cavity 421 . 40 of the second channel 423. The recesses 422 fit with the bumps 412 . The second holes are used for generating one of two kinds of suction air flow and jet air flow.

It should be noted that, in this embodiment, the first orifices 413, the second orifices 423 and a vacuum pump are communicated through a switching valve unit (not shown), so as to achieve the effect of generating negative pressure for attracting airflow, and The switching valve unit (not shown) communicates the second holes 423 with a pressurizing pump (not shown), so as to achieve the positive pressure effect of generating the jet airflow.

The second feeding mold 42 changes between a first mode (as shown in FIG. 7 ) and a second mode (as shown in FIG. 8 ). In the first mode, the second holes 423 generate suction airflow, In addition, the wet cup body 3 that has not been dried can be absorbed and moved. During the movement of the second feeding mold 42 , the second feeding mold 42 is firstly matched with a hot pressing mold (not shown), and the cup body 3 is hot pressed and dried to shape the cup body 3 . . Then, the cup body 3 after drying and shaping is carried and matched with the first splicing mold 41 .

In the second mode and at the same time when one of the first parting die 41 and the second parting die 42 is moved away from the other from the butted state, the second holes 423 generate jet airflow and push away The cup body 3 and the first holes 413 generate suction airflow to adsorb the cup body 3 , so that the cup body 3 automatically falls off the second feeding die 42 and is adsorbed on the first feeding die 41 superior. Thereby, in the process of one suction and one release, the purpose of automatic demolding is achieved, and during the demolding process, the cup body 3 will not stick to the second mold surface 421 .

Referring to Figure 6, Figure 7 and Figure 8, in this embodiment, the pulp of the cup body 3 is composed of plant fibers, water, and water repellent, wherein the freeness of the plant fibers is between 450 and 550 csf, and the concentration is between 0.2% ~0.8%, the proportion of water repellent is between 2%~6%.

In this embodiment, the heat resistance of the cup body 3 is between 95 degrees and 105 degrees, and the density is between 0.4 and 1.0 g/cm ³ .

The accommodating space 310 is suitable for accommodating liquid, with a volume ranging from 8 to 24 oz, and a depth T along an up-down direction Z ranging from 12 cm to 15 cm.

The inner surface 311 is separated from the outer surface 312 by a thickness d. The thickness d is between 0.8 mm and 1.2 mm.

A maximum depth t is defined between each of the recesses 313 and the outer surface 312 , and the maximum depth t is between 0.6 mm and 4 mm.

The two adjacent outer convex portions 314 are separated by a distance D, and the distance D is between 2 mm and 12 mm. And the surface area of the protruding portions 314 / the surface area of the outer surface 312 = 30% to 80%.

Each of the inner convex portions 315 defines a respective concave portion 313 . Each of the inner protrusions 315 and each of the outer protrusions 314 extend along the vertical direction Z.

And because the cup body 3 is composed of plant fibers, water, and water repellent, from a microscopic point of view, several tiny pores will be formed between the plant fibers, and the heating steam will escape.

Thereby, when the user holds the cup body 3 with his hand, the user's hand will only contact the protruding portions 314 . Therefore, the user's hand and the protruding portions 314 will be in approximately point contact, except that the In addition to reducing the area of heat conduction, a number of channels 316 for the flow of heating steam will be defined between the user's hand and the protruding parts 314, so that the hot steam can exchange heat with the outside air, thereby effectively reducing the body temperature, and To achieve the effect of thermal insulation.

It is worth noting that the depth t of each of the recesses 313 will affect the depth of the channels 316 and determine the heat exchange efficiency between the hot steam and the outside world. When the depth t is greater than 4 mm, although the heat exchange efficiency can be improved, The volume of the accommodating space 310 will be reduced. When the depth t is less than 0.6 mm, the passages 316 will be too small, which will reduce the flow effect of hot steam and the efficiency of heat exchange with the outside cold air, so that the body temperature will be reduced. rise.

In addition, the water repellent in the pulp can block the tiny pores between the plant fibers to achieve the waterproof effect. However, a water repellent with a proportion higher than 6% will cause the aforementioned hot vapor to escape slowly, and a water repellent with a proportion less than 2% will have poor waterproof effect.

And the density of the plant fibers in the slurry will determine the density of the cup body 3, the higher the density, the greater the density, and vice versa. Therefore, when the density is greater than 1.0g/ ^cm3 , the number of pores between the plant fibers will be reduced, and the size of the pores will also become smaller, resulting in the slow escape of the aforementioned hot steam, but it is not easy to manufacture, when the density is less than 0.4g/cm3 cm ³ , the number of pores between the plant fibers will increase, and the pore size will also increase, which will make the cup body 3 less rigid and the body temperature will increase.

The distance D between the convex portions 314 will affect the density and the area occupied by the convex portions 314. When the surface area of the convex portions 314/the surface area of the outer surface is 80% larger, and the distance When D is less than 2 mm, the contact points between the user's hand and the protruding parts 314 are more and denser, the contact area is large, most of the pores between the plant fibers are blocked by the hand, and the number of channels for the heat supply steam to escape is small and Narrow, therefore, the user's hand and the protruding parts 314 will be in surface contact, and the body temperature is still high. When the surface area of the protruding parts 314 / the surface area of the outer surface is 30% smaller, and the When the equal distance D is greater than 12 mm, the contact points between the user's hand and the convex portions 314 are few and sparse. At this time, the user's hand will directly contact the outer surface 312 of the cup body 3 because the equal distance D is large. , in addition to the foreign body feeling and poor stability when holding, and the heat will be directly transferred from the outer surface 312 to the user's hand, and the somatosensory temperature will be increased.

It is worth noting that the freeness of the plant fibers in the pulp will determine the speed at which the pulp removes water. Therefore, if the freeness is higher than 550csf, the water will disappear too quickly, which will cause uneven distribution of the plant fibers in the pulp, resulting in The yield becomes worse. If the freeness is lower than 450csf, the water disappears too slowly, which will prolong the hot-pressing setting time and will not meet the economic benefits.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. The present invention can push the cup body 3 to move in the opposite direction of the second feeding mold 42 through the jet air in the second holes 423 during automatic demolding, and at the same time, pass through the first holes 413. The suction airflow sucks the cup body 3 away from the second splicing die 42 . In this way, in the process of one suction and one release, the cup body 3 is assisted to escape from the second feeding die 42 smoothly, thereby improving the integrity of the cup body 3 when demoulding, and greatly improving the quality of the cup body 3 Rate.

2. Since the cup body 3 can be smoothly separated from the second receiving die 42, it can effectively prevent the jet air from damaging the cup body 3. When the thickness d of the cup body 3 is between 0.8mm and 1.2mm , the depth T of the accommodating space 310 of the cup body 3 can be expanded to 12cm~15cm without being broken by the jet airflow, thereby increasing the volume of the accommodating space 310 to 8~24oz.

3. It is important that by the design of the surface area of the outer protrusions 314 / the surface area of the outer surface 312 = 30% to 80%, and the porosity of the pulp, the speed of heat conduction can be effectively reduced to achieve insulation. The thermal effect enables the user to maintain the body temperature in a non-scalding and comfortable range when the user holds the cup body 3 with his hand, and can improve the comfort and stability of the holding.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

3: cup body 31: cup body 310: accommodating space 311: inner surface 312: outer surface 313: Recess 314: convex part 315: Internal convex part 316: Channel 32: Cup rim 4: Demoulding device 40: Cavity unit 41: The first receiving mold 411: The first mold surface 412: bump 413: The first channel 42: The second receiving mold 421: The second mold surface 422: Recess 423: Second port D: Spacing d: thickness T: depth t: depth z: up and down direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: 1 is a schematic perspective view illustrating a conventional cup sleeve disclosed in Patent Publication No. 201710157 of the Republic of China; 2 is a perspective view illustrating a conventional cup body disclosed in Patent Publication No. 201210903 of the Republic of China; 3 is a schematic cross-sectional view illustrating an embodiment of the automatic demolding device of the present invention for manufacturing a cup; Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3; 5 is a schematic cross-sectional view, illustrating that the cup body is detached from a second feeding die of this embodiment and is adsorbed on a first feeding die; FIG. 6 is a perspective view illustrating the cup manufactured by this embodiment; Figure 7 is a cross-sectional view of a cup manufactured by this embodiment; and FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7. FIG.

3: cup body

4: Demoulding device

40: Cavity unit

41: The first receiving mold

411: The first mold surface

413: The first channel

42: The second receiving mold

421: The second mold surface

422: Recess

423: Second port

z: up and down direction

Claims (3)

An automatic demoulding device is used to manufacture a cup body formed from pulp, the cup body comprises a cup body, the cup body has an inner surface defining an accommodating space, an outer surface opposite to the inner surface, and a number of forming On the outer convex part of the outer surface, and several concave parts extending from the outer surface toward the inner surface direction, the automatic demolding device includes: a first material receiving mold and a second material receiving mold which are detachably butted against each other and define a mold cavity unit, the mold cavity unit is suitable for accommodating the cup body; The first splicing mold includes a first mold surface for contacting the outer surface of the cup body, bumps protruding from the first mold surface, and a first channel connected to the mold cavity unit , the first orifices are used to generate suction airflow; The second splicing mold includes a second mold surface contacting the inner surface of the cup body, several cavities recessed from the second mold mold surface, and several second holes connected to the mold cavity unit, the The cavities fit with the bumps, and the second holes are used to generate one of two kinds of suction airflow and jet airflow; The second feeding mold changes between a first mode and a second mode. In the first mode, the second holes generate suction airflow and can absorb the cup to move. In the second mode Mode and one of the first splicing die and the second splicing die move away from the other from the butted state, and the second orifices generate jet airflow to push away from the cup body. A hole generates suction airflow to adsorb the cup body, so that the cup body automatically falls off the second feeding die and is adsorbed on the first feeding die. The automatic demolding device according to claim 1, wherein the cavity unit has at least one cavity for accommodating the cup. The automatic demolding device according to claim 2, wherein the mold cavities are arranged in an array.

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