TW202103596A - Method for manufacturing safety helmet capable of shortening the production time while having high structural strength - Google Patents

Abstract

Provided is a method for manufacturing safety helmet, which includes: a step A for forming a plurality of assembly parts from a piece of thermoplastic sheet; and a step B for bonding the assembly parts to manufacture the safety helmet. By a manner of firstly forming the assembly parts and then bonding the assembly parts, not only a special relatively time-saving method for manufacturing safety helmet can be provided, but also the manufactured helmet can be provided with high structural strength. Moreover, in the step A, each assembly part includes a main part and at least one bonding part that is integrally extended from the main part and has a thickness smaller than that of the main part. In the step B, the at least one bonding part of each assembly part is bonded onto the at least one bonding part of the corresponding assembly part to manufacture the safety helmet.

Description

How to make a safety helmet

The invention relates to a manufacturing method of a helmet, in particular to a manufacturing method of a safety helmet.

One of the current manufacturing methods of safety helmets is to first stack multiple layers of prepreg in a cavity of a mold to form a prepreg unit, and then heat and press the prepreg unit to produce the safety helmet. However, in the process of stacking the prepregs, the position and angle of the prepregs in the cavity must be fine-tuned continuously, so that each prepreg can be stacked on the previous prepreg in a correct manner. on. In addition to the disadvantage of a long stacking time, this manufacturing method also takes a long time to harden the prepreg unit into the safety helmet. Therefore, it is necessary to provide a different manufacturing method of the safety helmet for the industry to choose and use, and even better to further shorten the production time of the safety helmet.

Therefore, the purpose of the present invention is to provide a method for manufacturing a safety helmet that can overcome at least one of the disadvantages of the prior art.

Therefore, the manufacturing method of the safety helmet of the present invention includes step A: forming at least one thermoplastic sheet into a plurality of assembly parts; and step B: bonding the assembly parts to make the safety helmet.

The effect of the present invention is to provide another method for manufacturing a safety helmet for the industry to choose from, and directly use the thermoplastic sheet to make the assembly parts, and then bond the assembly parts to the manufacturing method, which is compared with the previous method. Technically, it can save a lot of time.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.

1 to 3, the first embodiment of the manufacturing method of a safety helmet of the present invention is suitable for manufacturing a construction site helmet 1 (refer to FIG. 4) as an example, but the first embodiment can also be used to manufacture locomotives The safety helmet or bicycle safety helmet used is not limited to the first embodiment.

The first embodiment includes an assembly manufacturing step S1 and a bonding step S2.

In the assembly manufacturing step S1, a piece of thermoplastic sheet 2 with a thickness of 1.00 mm and a length and a width of 350 mm and 350 mm is cut into two pieces, which are cut into oval shapes as shown in Figure 2.的板件3。 To be processed plate 3. In the first embodiment, the thermoplastic sheet 2 is a carbon fiber sheet of model NR-2600 manufactured by Nanbao Resin Chemical Factory Co., Ltd. In other variations of this embodiment, the thickness of the thermoplastic sheet can also be 0.1 mm to 3.0 mm.

Next, in the assembly manufacturing step, two molds 4, 4'with cavities of different shapes are also prepared, and the waiting plate 3 is placed in the molds 4, 4'to be hot-pressed, respectively. Make two assembly parts 6, 6'.

Among them, the hot pressing temperature of each mold 4, 4'during hot pressing is 180 ℃, the hot pressing pressure of the waiting plate 3 is 15 kg/cm2, and the hot pressing time of the waiting plate 3 is Is 120 seconds. In other embodiments of the present invention, the hot pressing temperature of the molds 4, 4'during hot pressing can also be 100°C to 340°C, and the hot pressing pressure of the waiting plate 3 can also be 5 kg/cm ² to 30 kg/cm ² , and the hot pressing time can also be 30 seconds to 120 seconds.

In other variations of this embodiment, the thermoplastic sheet 2 can also be cut into the waiting-to-be-processed plate 3, which is roughly square, and then cut the excess part after hot pressing to form the assembled parts. 6, 6'.

Referring to Figures 3 to 5, each assembly 6, 6'includes a main part 61, 61' bent in an arc shape, and a main part 61, 61' substantially integrally extending along the arc. The bonding parts 62, 62'.

The main part 61, 61' of each assembly 6, 6'has an inner side surface 611, 611' located on the inner side in the radial direction, and an outer side surface 612, 612' opposite to the inner side surface 611, 611' . Each inner side surface 611, 611' and the corresponding outer side surface 612, 612' define a thickness T1 that extends substantially in the radial direction.

Each bonding portion 62, 62' has a bonding surface 621, 621', and a connecting surface 622, 622' that are opposite to each other in the radial direction and extend substantially in the arc direction. Each connecting surface 622, 622' and the corresponding bonding surface 621, 621' define a thickness T2 that extends substantially in the radial direction. The thickness T2 defined by each bonding portion 62, 62' is approximately half of the thickness T1 defined by the corresponding main part 61, 61', and is smaller than the thickness T1.

The connecting surface 622 of the adhesive portion 62 of one of the assembling members 6 is integrally connected with the corresponding inner side surface 611, and the adhesive surface 621 of the adhesive portion 62 and the corresponding outer side surface 612 are spaced apart from each other. The connecting surface 622' of the adhesive portion 62' of the other assembly 6'is integrally connected with the corresponding outer side surface 612', and the adhesive surface 621' of the adhesive portion 62 and the corresponding inner side surface 611' are spaced apart from each other.

In the bonding step S2 (as shown in FIG. 1), an adhesive 9 is coated on the bonding surfaces 621, 621', and then the bonding surfaces 621, 621' face each other to make the bonding The parts 62 and 62' are laminated and bonded radially to bond the assembly parts 6, 6'to make the safety helmet 1. The adhesive is epoxy structural adhesive, for example: the structural adhesive of DP420NS manufactured by 3M Company, or the structural adhesive of LOCTITE EA 3455 manufactured by Henkel Company.

In the first embodiment, the thermoplastic sheet 2 is made into the assembly parts 6, 6', and then the adhesive 9 is used to bond the bonding surfaces 621, 621' of the bonding parts 62, 62', so that the assembly The parts 6, 6'are connected to each other in a manner of superimposing and bonding the bonding parts 62, 62'. In addition to providing another manufacturing method of the safety helmet 1, the radial superposition bonding of the bonding parts 62, 62' The structure can also make the structural strength of each bonding place greater than the structural strength of the main parts 61, 61'.

Referring to Figure 1, Figure 6 and Figure 7, a second embodiment of the manufacturing method of the safety helmet of the present invention is similar to the first embodiment, except that: in the assembly manufacturing step S1, the The thermoplastic sheet 2 is cut into two flat plates 3 with the same shape, and then the same mold 4" is used to sequentially heat press the plate 3 to be processed into two plates with the same shape.的中板件5、5'。 Wherein, the hot pressing temperature of the mold 4" during hot pressing is 180°C, the hot pressing pressure of the waiting plate 3 is 12 kg/cm2, and the hot pressing time is 75 seconds. It should be noted that in other variations of the second embodiment, the hot pressing temperature of the mold 4" can also be 100°C to 340°C, and the hot pressing pressure of the waiting plate 3 can also be 5 kg/cm ² to 30 kg/cm ² , the hot pressing time of the waiting plate 3 can also be 30 seconds to 120 seconds.

In the assembly manufacturing step S1, after the intermediate plates 5, 5'are formed by hot pressing, one of the intermediate plates 5 needs to be cut off a band-shaped part from the outside to the inside along the arc direction. One middle plate 5 is processed into one of the assembly parts 6, and the other middle plate 5'is cut off a band-shaped part from the inside to the outside along the arc direction, so as to process the other middle plate 5'into the other One assembly 6'. Finally, as described in the first embodiment, the bonding parts 62, 62' of the assembly parts 6, 6'are laminated and bonded together in the radial direction to form the safety helmet 1.

Referring to Figures 1 and 8, a third embodiment of the manufacturing method of the safety helmet of the present invention is similar to the first embodiment, except that, in the assembly manufacturing step S1, a mold (Figure (Not shown) The uncut thermoplastic sheet 2 (as shown in FIG. 2) is hot-pressed to form the prototype of the safety helmet. Wherein, the hot pressing temperature of the mold during hot pressing is 180° C., the hot pressing pressure of the thermoplastic sheet 2 is 15 kg/cm 2, and the hot pressing time is 120 seconds. In other variations of the third embodiment, the hot pressing temperature of the mold can also be 100°C to 230°C, and the hot pressing pressure of the thermoplastic sheet 2 can also be 5 kg/cm ² to 30 kg/cm2. cm ² , the hot pressing time of the thermoplastic sheet 2 can also be 30 seconds to 120 seconds.

Then, the thermoplastic plate 2 with the hat embryonic shape is cut into half from left to right, and the two parts of the half-cut thermoplastic plate 2 are cut as described in the second embodiment to make the assembled parts 6, 6'. After that, the assembly parts 6, 6'are also bonded in the bonding step S2 to make the safety helmet 1 (as shown in FIG. 4).

Refer to FIG. 9, which is a fourth embodiment of the manufacturing method of the safety helmet of the present invention. It is similar to the first embodiment, except that, in the assembly manufacturing step S1, the thermoplastic sheet (FIG. (Not shown), cut into a plate to be processed in the shape of a combination of the parietal bone and the frontal bone, and two plates to be processed in the shape of the left and right temporal bones respectively. After that, prepare three different molds (not shown in the figure), and place each plate to be processed in its own mold, and then heat-press the plate to be processed to form three assembled parts 7, 7', 7''.

One of the assembling parts 7 is shaped to roughly cover the parietal bone and forehead bone of a user, and includes a main part 71 located in the center, and a main part 71 protruding outward from both sides of the main part 71的连接部72。 Bonding section 72. The other assembling part 7'is roughly shaped to cover the user's right temporal bone, and includes the main part 71' and the bonding part 72'. The shape of the remaining one assembly part 7'' is roughly the shape that can respectively cover the left temporal bone of the user, and includes the main part 71'' and the bonding part 72''.

In the bonding step S2, the bonding part 72 of the assembly 7 and the bonding parts 72', 72'' of the assembly parts 7'and 7'on both sides are superposed and bonded to each other.

It should be noted that the number of bonding parts 72, 72', 72'' of each assembly 7, 7', 7'' is not limited to one. To implement the bonding requirements of the corresponding assembly parts 7, 7', 7'' according to the above, the number of the bonding parts 72, 72', 72'' can be two, three... and so on.

In summary, the manufacturing method of the safety helmet of the present invention uses the bonding method to bond the assembly parts 6, 6', 7, 7', 7", and the safety helmet 1 with high structural strength can be manufactured, and it is reliable Provides another method for manufacturing a safety helmet; furthermore, since the present invention does not require complicated and time-consuming prepreg stacking steps, it can save a lot of time and reduce production time costs, so it can indeed achieve the purpose of the invention. .

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

S1: Assembly production steps S2: bonding step 1: safety helmet 2: Thermoplastic sheet 3: Panels to be processed 4: Mould 4’: Mould 4’’: Mould 5. 5’: Intermediate plate 6, 6’: Assembly 61, 61’: Main part 611, 611’: inner side 612, 612’: Outer side 62, 62’: Adhesive part 621, 621’: Adhesive surface 622, 622’: connecting surface 7, 7’, 7’’: Assembly 71, 71’, 71’’: the main part 72, 72’, 72’’: Adhesive part 9: Adhesive T1: thickness T2: thickness

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a flowchart illustrating the flow of a first embodiment of the manufacturing method of the safety helmet of the present invention; 2 is a schematic top view illustrating that in an assembly manufacturing step of the first embodiment, a thermoplastic sheet is cut into a plurality of flat pieces to be processed; 3 is a schematic diagram illustrating that in the assembly manufacturing step of the first embodiment, the waiting-to-be-processed part is hot-pressed into a plurality of different assemblies with different molds; Figure 4 is a cross-sectional view, cut along the left and right directions, and illustrates the helmet made by bonding the assembly parts; Figure 5 is an incomplete cross-sectional view, magnified to illustrate the bonding relationship between the two bonding parts; Figure 6 is a schematic diagram illustrating a second embodiment of the manufacturing method of the safety helmet of the present invention. In the assembly manufacturing step, the thermoplastic sheet is cut into the waiting-to-be-processed parts, and the same mold is used to separately heat press The pending item; Fig. 7 is a schematic cross-sectional view illustrating the second embodiment of the method for manufacturing a safety helmet of the present invention. In the assembly manufacturing step, a plurality of intermediate plates obtained by hot pressing the waiting part are cut into the And other assembly parts; FIG. 8 is a schematic diagram illustrating the manufacturing steps of the assembly of a third embodiment of the manufacturing method of the safety helmet of the present invention; and 9 is a cross-sectional view illustrating a fourth embodiment of the manufacturing method of the safety helmet of the present invention, the safety helmet is cut along the left and right directions, and the viewing angle is from front to back, so the left side of the figure is the right side of a user , The right side of the picture is the left side of the user.

S1: Assembly production steps

S2: bonding step

Claims (10)

A method for making safety helmets, including: Step A: Make at least one thermoplastic sheet into multiple assemblies; and Step B: Glue the assembly parts together to make the safety helmet. The method for manufacturing a helmet according to claim 1, wherein, in step A, each assembly includes a main part, and at least one piece integrally extends from the main part and has a thickness smaller than the main part In the step B, the at least one adhesive part of each assembly and the at least one adhesive part of the corresponding assembly are superposed and bonded to form the safety helmet. The manufacturing method of the safety helmet according to claim 2, wherein, in the step A, the thickness of the at least one adhesive part of each assembly is substantially half of the thickness of the corresponding main part. The method for manufacturing a safety helmet according to claim 3, wherein in step A, the at least one adhesive portion of each assembly substantially extends from the main portion along an arc, and each assembly The substantially radial thickness of the at least one bonding portion is approximately half of the substantially radial thickness of the corresponding main component portion. In step B, the at least one bonding portion of each assembly is made to correspond to The at least one adhesive portion of the corresponding assembly is substantially stacked in a radial direction and bonded with an adhesive to form the safety helmet, and the adhesive is an epoxy structural glue. The method for manufacturing a safety helmet according to any one of claims 1 to 4, wherein, in the step A, the at least one thermoplastic sheet is cut into a plurality of plates to be processed, and then the A different mold heat-presses the panel to be processed into the assembled parts. The method for manufacturing a safety helmet according to claim 5, wherein the thickness of the at least one thermoplastic sheet is 0.1 mm to 3.0 mm, and the hot pressing temperature of the molds is 100° C. to 340° C. The hot pressing pressure of 5 kg/cm ² to 30 kg/cm ² , and the hot pressing time of the waiting processing plate is 30 seconds to 120 seconds. The method for manufacturing a safety helmet according to any one of claims 1 to 4, wherein, in the step A, the at least one thermoplastic sheet is first divided into a plurality of plates to be processed, and then the same mold is used The plates to be processed are respectively hot pressed into several intermediate plates, and then cut to form the assembled pieces. The method for manufacturing a safety helmet according to claim 7, wherein the thickness of the at least one thermoplastic sheet is 0.1 mm to 3.0 mm, and the hot pressing temperature of the mold is 100° C. to 340° C. The hot pressing pressure is 5 kg/cm ² to 30 kg/cm ² , and the hot pressing time of the waiting processing plate is 30 seconds to 120 seconds. The method for manufacturing a safety helmet according to any one of claims 1 to 4, wherein, in step A, the at least one thermoplastic sheet is first hot-pressed in a mold, and then the hot-pressed at least A thermoplastic sheet is cut and cut to make these assemblies. The method for manufacturing a safety helmet according to claim 9, wherein the thickness of the at least one thermoplastic sheet is 0.1 mm to 3.0 mm, the hot pressing temperature of the mold is 100°C to 230°C, and the thickness of the at least one thermoplastic sheet is 100°C to 230°C. The hot pressing pressure is 5 kg/cm ² to 30 kg/cm ² , and the hot pressing time of the at least one thermoplastic sheet is 30 seconds to 120 seconds.

Images