TWI680851B - Pouch manufacturing method and its mold - Google Patents

Abstract

A method for manufacturing a bladder and a mold thereof. The method for manufacturing a bladder includes the following steps: a plasticized leather is stretched downward on a forming mold using vacuum forming technology to form a bladder, and then The capsular bag is filled with a sponge and combined with a plastic sheet, and the captive bag is further combined with an earphone by the plastic sheet; and the forming mold is composed of a hollow ring-shaped body, a base and a base combined with the base The column on the center is assembled, and a forming groove is formed between the body, the base and the column to form the bag, because the bag is completely fixed in the forming groove when forming, Therefore, the bladder can only shrink the space in the forming groove, so the shrinkage range of the cold shrinkage and thermal expansion of the leather is greatly reduced to ensure the accuracy of the bladder size.

Description

Pouch manufacturing method and its mold

The invention relates to a method for manufacturing a pouch and its mold, in particular to a pouch that can cover ears by vacuum molding using a concave mold.

Please refer to Figures 1 and 2, an earmuff 10 is a hollow ring structure, which is an earmuff earphone 20 or a special earmuff for the target to cover the ear part of the user, so that the user can isolate the external noise and enjoy the music, The earmuff 10 is formed by combining a hollow ring-shaped gasket and a plastic sheet 14, one surface of the plastic sheet 14 is combined with the gasket, and the other surface is fixed on the over-ear earphone 20; the gasket It includes a pouch 11 with an open connection portion 112 and an accommodating space 111 capable of accommodating a sponge 12, and a viscous substance 13 on the connection portion 112 can be combined with the plastic sheet 14.

Please refer to Figures 3 and 4, the conventional manufacturing method of the bag 11 includes:

Step 1: Prepare an annular forming mold 70 and place it on a base 90, and the base 90 is provided with a plurality of air holes 91 along the inner and outer edges of the forming mold 70;

Step 2: Prepare a plastic skin 60, which is plastic and soft after high temperature; and

Step 3: Inhale downward through the air holes 91 to attach the leather 60 to the forming mold 70. At this time, the forming mold 70 and the leather 60 are in a vacuum state. This is a vacuum forming method.

Step 4: By the plasticity of the leather material 60, the leather material 60 is attached to the forming mold 70 downward, and the leather material 60 is stretched upward to form a three-dimensional bag 80.

Step 5: The manufacturer then cuts, fills the sponge 12, and sticks the plastic sheet 14 to form the earmuff 10 (see FIG. 1).

However, please refer to Figures 4 and 5 again. Because the air holes 91 are sucked down and evacuated, the three-dimensional pouch 80 is affected by the vacuum suction, and will closely adhere to the base and the forming mold 70. As a result, a plurality of air hole indentations 84 are formed at the corresponding air holes 91, which affects the overall appearance of the three-dimensional bag 80; again, because the leather is a stretchable material, when the three-dimensional bag 80 is stretched to form After that, the leather 60 of the forming mold 70 has a stretched tension. When the three-dimensional pouch 80 is removed from the forming mold 70 after cooling, the three-dimensional pouch is based on the principle of cold shrinkage and thermal expansion. The bag 80 will shrink overall from the surrounding residual material, causing its size to be inconsistent with the original setting. When the size of the connecting portion 112 is different from the original setting, it will affect the fit of the plastic sheet 14.

For this reason, it is known that the forming mold 70 will reserve the shrinkage space of the three-dimensional pouch 80 when it is manufactured, but there is no guarantee that the three-dimensional pouch 80 will contract the same amount each time, so there will still be The situation in which the size of the sheet 14 is not the same occurs.

Please refer to FIGS. 3 to 5, as can be seen from the sectional view of the three-dimensional pouch 80, the formed three-dimensional pouch 80 is a concave structure with an open bottom, which has two peaks 81, a valley 82, and a One of the storage spaces 83 of the sponge 14 is filled, and the peaks 81 are respectively a letter-shaped structure, because the junction between the valley 82 and the peaks 81 is the exhausting place of the air holes 91, in the vacuum forming process Because of the suction force, the leather 60 will be close to the base 90, but after forming, the air holes 91 are no longer evacuated, the outer edge of the three-dimensional bag 80 is not constrained by external forces, and the principle of cold shrinkage and thermal expansion, The edge of the boundary between the peaks 81 and the valleys 82 shrinks into an arc, resulting in a size error of the connection portion 112 of the three-dimensional pouch 80.

For this reason, how to solve the above-mentioned problems is the subject that the industry-related industry is eager to study.

The main object of the present invention is to provide a method and a mold for manufacturing a pouch, using a concave forming mold to produce a pouch with a reduced size that is not affected by cold shrinkage through the traditional vacuum forming method, and further the pouch The bag is used on products that cover the ears, such as earmuff headphones or soundproof earmuffs.

To achieve the above purpose, the technical means is that the forming mold is composed of a hollow ring-shaped body, a base, and a column bonded to the center of the base, and the body is between the base and the column A forming groove is formed. When a plastic leather is heated, it is closely adhered to the forming mold by vacuum forming technology. When cooling, a bag is formed in the forming groove, because the bag is formed It is completely fixed in the forming groove, and the forming mold is limited to the concave type when forming. The bag can only shrink the leather contained in the forming groove, so the shrinkage of the leather is large For lowering, and the opening of the bladder is a connecting part combined with a plastic sheet, the range of which is fixed by the forming mold, thus improving the accuracy of the size of the bladder.

Another object of the present invention is to avoid the occurrence of air holes for vacuum evacuation in the formed bag to maintain the overall shape and aesthetic appearance of the bag.

To achieve the above purpose, the technical means is that the bottom of the body of the forming mold is provided with a plurality of bumps on the joint surface with the base, and then an annular air chamber is formed between the two elements. When vacuum forming, the air will move along The air chamber is drawn uniformly from the bottom side of the forming mold to maintain the integrity of the pouch and maintain its aesthetic appearance.

In order to facilitate your examination committee to have a better understanding and understanding of the technical means and operation process of the present invention, here is an example with the drawings, detailed description is as follows.

Examples

Please refer to FIG. 6 to FIG. 8, in this embodiment, the pouch 11 is further processed into an earmuff 10 combined with the over-ear earphone 20 (see FIG. 2), and the pouch of the present invention The manufacturing method of the bag includes the following steps:

Step 1: Prepare a forming mold 30 on the base 90. The forming mold 30 is composed of a hollow ring-shaped body 31, a base 32 and a cylinder 33, wherein the cylinder 33 utilizes a plurality of locking elements 34 is combined with the center of the base 32, and the body 31 is also combined with the base 32 through the locking elements 34, and a forming groove 35 is formed between the base 32 and the column 33 to make the forming mold 30 inside Forming a similar "mountain" structure; further, the bottom of the body 31 is provided with a plurality of bumps 36 adjacent to the base 32, so that the body 31 and the base 32 cannot be completely tightly combined, there will be The gap, that is, an annular air chamber 37 is formed. During vacuum forming, air is drawn away from the annular air chamber 37 in an annular shape.

Step 2: Prepare the leather 60 plasticized by high temperature.

Step 3: From the air chamber 37 of the forming mold 30, the air is evacuated uniformly from the side.

Step 4: Move the plasticized leather 60 close to the forming mold 30. Due to the influence of vacuum, the leather 30 is completely adsorbed on the forming mold 30. At this time, a vacuum state is formed between the two components; and the leather 60 clings to the forming groove 35 and stretches to form the pouch 11.

Step 5: After forming, the bladder 11 is formed by extension, so it is still a soft and flat cloth structure after being removed from the forming mold 30, and a three-dimensional bladder 80 structure that is not produced by conventional methods (see 4); however, the shape of the pouch 11 is a concave shape according to the forming mold 30, and the accommodating space 111 is provided therein.

Step 6: Please refer to FIG. 1 and FIG. 2, after filling the accommodating space 111 of the pouch 11 with soft fillers such as the sponge 12, foam, etc., then connect the opening portion 112 of the pouch 11 Attaching the viscous substance 13, the earmuff 10 is formed, that is, the plastic sheet 14 connected thereto is fixed to an object that can cover the ear, and the object that can cover the ear includes: the earmuff-type earphone 20. Soundproof earphones or warm earmuffs, etc.

Please refer to Figures 7 and 8, the vacuum forming technology is used in this embodiment, because the annular air chamber 37 of the forming groove 35 is an annular structure, when the air is evacuated, through the annular structure, the suction force is uniform, so that The leather 60 is evenly attached to the forming groove 35 to extend and shape. When cooling, the bladder 11 is fixed in the forming mold 30, especially the range of the connecting portion 112 is affected by the forming mold 30 Is constrained, and the pocket 11 is restricted by the forming groove 35, so there is no excess leather around to shrink it, so the shrinkage range is limited, so that the size accuracy of the pocket 11 is higher than that of the conventional ones , And can further reduce the error when combining with the plastic sheet 14; and the present invention uses a concave forming mold 30, the suction portion of the annular air chamber 37 is the convex portion of the pouch 11, not the connecting portion 112, Therefore, when the pumping stops, even if the bladder 11 contracts, it will not affect the size of the connecting portion 112 (see FIG. 1).

Please refer to FIG. 7 again, wherein when the forming mold 30 is vacuum formed, air is drawn from the bottom of the forming mold 30, that is, the junction of the body 31 and the base 32, from bottom to top, and then to the operation The surface, that is, the annular air chamber 37, the air flows in the annular air chamber 37 in an annular shape to achieve an annular suction force and uniform suction force, so that the bladder 11 is uniformly formed.

Please refer to FIG. 7 and FIG. 8 again, during the forming of this embodiment, the leather 60 is affected by the vacuum and will be closely combined with the forming groove 35 of the forming mold 30. Therefore, if the forming mold 30 has Any pattern will be printed on the pouch 11 so that the pouch 11 has different patterns. For this reason, when manufacturing the forming mold 30, the forming mold 30 can be engraved according to customer needs Logo or text to customize the bag 11.

As shown in FIG. 8, compared with the conventional technology, the bladder 11 produced by the present invention has a soft, non-formed planar structure, and the planar structure has a smaller stretch than the three-dimensional range, so it is significantly The overall contraction range of the pouch 11 is reduced, and the accuracy of the pouch 11 is improved.

However, the above are only preferred embodiments of the present invention, which should not be used to limit the scope of implementation of the present invention; therefore, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description , Should still fall within the scope of this invention patent.

10‧‧‧Earmuffs 11‧‧‧Pouch 111 111‧‧‧Accommodation space 112‧‧‧Connecting part 12‧‧‧Sponge 13‧‧‧Viscous substance 14‧‧‧Plastic film 20‧‧‧Earmuff type Earphone 30‧‧‧Molding mold 31‧‧‧Body 32‧‧‧ Base 33‧‧‧Cylinder 34‧‧‧Locking element 35‧‧‧Shaping groove 36‧‧‧Bump 37‧‧‧‧Annular air chamber 60‧‧‧Leather 70‧‧‧Molding mold 80‧‧‧Three-dimensional bag 81‧‧‧Peak 82‧‧‧Valley 83‧‧‧Accommodation space 84‧‧‧Stomal indentation 90‧‧‧Base 91 ‧‧‧Blowhole

Figure 1 shows the overall explosion of the earmuffs.

Figure 2 is an overall schematic of an over-ear headset.

FIG. 3 is a schematic diagram of the first step of the conventional manufacturing method.

FIG. 4 is a schematic diagram of the second step of the conventional manufacturing method.

Figure 5 is a schematic cross-sectional view of a conventional three-dimensional pouch.

Figure 6 is an exploded view of the mold of the present invention.

Figure 7 is a schematic diagram of the manufacturing method of the present invention.

Fig. 8 is a schematic diagram of leather materials and pouches manufactured by the present invention.

30‧‧‧Forming die

31‧‧‧Body

32‧‧‧Base

33‧‧‧Cylinder

34‧‧‧Locking element

36‧‧‧Bump

Claims (7)

A method for manufacturing a bladder includes the following steps: Step 1: Install a forming mold on a base, the forming mold is composed of a hollow ring-shaped body, a base, and a column bonded to the center of the base, A shaped groove is formed between the body, the base, and the column, and the joint surface of the body and the base is provided with a plurality of protrusions, so that the body and the base cannot be closely adhered, and a ring-shaped air chamber is further formed; step 2 : Plasticize a leather through high temperature treatment; Step 3: Place the plasticized leather on the forming mold, and at the same time draw air from the annular air chamber uniformly, so that the leather and The forming mold is in a vacuum state, so that the leather material is stretch-shaped in the forming mold and the forming groove, that is, a soft, cloth-structured bag is produced, and the bag has an accommodating space and an opening. Connection part; and Step 4: Remove the cooled bag from the forming mold, and cut off the excess leather. The method for manufacturing a pouch as described in item 1 of the patent application scope, wherein after the accommodating space of the pouch is filled with a soft filler and combined with a plastic sheet, an earmuff is produced, through which the plastic sheet can Attach the earmuff to an object that covers your ears. The method for manufacturing a pouch as described in item 2 of the patent application scope, wherein the soft filler can be selected from sponge or foam. The method for manufacturing a pouch as described in item 2 of the patent application scope, wherein the ear covering objects include: earmuff-type earphones, soundproof earmuffs, and warm earmuffs. A bladder manufacturing mold is a forming mold specially for bladder manufacturing, including: a body, which is a hollow ring structure, and a plurality of convex bumps are provided on the bottom surface; A base is fixed to the bottom of the body through a plurality of locking elements. Due to the protrusions of the body, the base and the body cannot be closely adhered to each other, forming an annular air chamber for vacuuming during vacuum forming It is uniform and reduces the surface defects of the finished product; and a column is fixed to the center of the base by the locking elements, and a concave shaped groove is formed between the body and the base. As described in item 5 of the patent application scope, a bag manufacturing mold, in which a high-temperature plasticized leather material, is placed on the forming mold using vacuum forming technology, and the air is evenly extracted by the annular air chamber, so that The leather material completely fits into the forming groove of the forming mold to extend and shape, thereby forming a bag. For example, the manufacturing mold of the bag described in item 6 of the patent application scope, in which the forming mold can be engraved with text or graphics, so that the formed bag has special patterns.

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