CN1057249C

CN1057249C - Wholly moulding method of surfboard

Info

Publication number: CN1057249C
Application number: CN97116843A
Authority: CN
Inventors: 陈清溪
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-01
Filing date: 1997-09-01
Publication date: 2000-10-11
Anticipated expiration: 2017-09-01
Also published as: CN1210066A

Abstract

The present invention relates to an integral molding method for surfboards, which comprises the procedures that a plastic blank plate is cut and is placed into a primary mold for pressurization and heating so that a semi-foaming blank plate is formed; the semi-foaming blank plate is then placed into a secondary mold with the intact shape of the surfboard for pressurization, heating and foaming so that an intact and plump structure body is formed; when the structure body is fully cooled and molded, the mold is opened so that a surfboard finished product which is made by integral molding and is provided with an intact appearance shape is made. The efficacy of shortening manufacturing procedures, reducing waste materials and increasing quality is achieved.

Description

The integral formation method of surfboard

The present invention relates to the process technology of surfboard, refer in particular to a kind of integral formation method of surfboard.

Surfing has been one of very general entertaining sports events, because surfboard is light and handy, needn't carry heavy plant equipment, not need the oil plant energy, need not stand earsplitting engine noises interference again, so at the seabeach or the bathing beach, often see that people do surfing, when billow, can do the fierce ballistic motion of taking advantage of wave by ripple: it is floating waterborne on it to couch when the moderate seas, enjoy the not busy enjoyment of body of nature fluctuation, ten minutes stimulates and enjoys.

The manufacture method of surfboard commonly used as shown in Figure 1, key step comprises:

(1) cut plastics: the bulk plastics are cut into rectangle 1, shown in (A) among Fig. 2:

(2) go into heating pressurization in the one-off pattern: rectangular plastic 1 is put into one time 2 pressurized, heated foaming, and temperature is 180 ℃, and the time is 30 minutes, makes the blowing agent decomposition in the plastics produce the foaming and intumescing effect, and its die cavity is rectangular, shown in (B) among Fig. 2;

(3) material 4 that partly foams is taken out in die sinking: the volume of the material 4 that partly foams this moment is 6-10 a times of plastics 1, and still rectangular body is shown in (C) among Fig. 2;

(4) go into two apotype pressurized, heated: the material 4 that will partly foam is inserted the 5 interior pressurized, heated foaming of two apotypes, and temperature is 160 ℃, and the time is 30 minutes, makes blowing agent continue to expand, and its volume is 2-3 a times of half foaming material 4, shown in (D) among the figure:

(5) cooling and shaping: make two apotypes 5 be cooled to 120 ℃:

(6) foaming material 6 is taken out in die sinking: because foaming material 6 is in 120 ℃ high temperature, can be in die sinking moment volumetric expansion about 15%, foaming material 6 cools off naturally, volume withdraws about 5% again, expansion and the contraction of this foaming material 6 outside mould, very easily produce chill mark, shown in (E) among Fig. 2;

(7) the material 6 severing stamps that will foam: the volume of the material 6 that generally foams be surfboard 3-5 doubly, foaming plate 7 that must severing stamp surfboard blank; Shown in Fig. 2 (F), cutting out the leftover pieces 8 that remove becomes waste material;

(8) cutting foaming plate nose gradient: utilize cutter plate 7 the place ahead nose bottoms 9 cuttings of will foam, form the shape by Bao Jianhou, function is controlled in operation when improving surfboard and using, and the leftover pieces of cutting become waste material again, shown in Fig. 2 (G);

(9) the edge angle of cutting foaming plate: the side of the plate 7 that will foam cuts into the edge 11 that is the ㄑ type, increases the flexibility that surfboard uses, and the sheet material 12 that is eliminated forms waste material again, shown in Fig. 2 (H):

(10) go into the typing of three apotypes: because the cutting position of foaming plate 7 is unsmooth carefully and neatly done, must go into three apotypes and bestow lower pressurized, heated, calm down the surface of being cut, but because front and back pressurized, heated condition difference, cause to be cut with the end and cut out the position color and luster depth difference of cutting by sanction;

(11) die sinking: take out surfboard finished product 20, as shown in Figure 3.

The major defect of the manufacture method of above-mentioned surfboard commonly used is:

1, manufacturing step is numerous and diverse: the moulding of surfboard external form must be through the typing of three apotypes, waste of manpower and man-hour;

2, stamp and working angles cause waste material more, and powerful foaming body is low because of organic efficiency, often burn or bury, and increase environmental pollution and garbage disposal;

3, the quality of surfboard is not good enough, because the foaming plate forms opening pore after Tool in Cutting, can absorb seawater and organic substance, increases the weight of surfboard and is difficult to drying, and the organic matter breeding of concealing easily produces peculiar smell;

4, three apotypes typing condition difference causes color and luster depth difference, influences outward appearance.

The object of the present invention is to provide a kind of integral formation method of surfboard, overcome the drawback of prior art, it is simple to reach processing procedure, reduces the waste of manpower and materials and the effect of raising end product quality.

The object of the present invention is achieved like this: a kind of integral formation method of surfboard is characterized in that this forming method in turn includes the following steps:

(1) cuts plastics blank plate: the plastics blank plate that plastics severing stamp is become the surfboard shape;

(2) go into pressurized, heated in mould: this blank plate is inserted pressurized, heated foaming in mould, in the upper and lower mould of this mould, the die cavity that is provided with butt joint and has the surfboard shape;

(3) the blank plate that partly foams is taken out in die sinking: this blank plate bulk that partly foams is expanded to 6-10 times of plastics blank plate bulk;

(4) go into pressurized, heated in the secondary mould: this blank plate that partly foams is inserted pressurized, heated foaming in the secondary mould, in the upper and lower mould of this secondary mould, be provided with the die cavity that can dock and have the complete shape of surfboard, expand by heating this blank intralamellar part air that partly foams, press in producing, make the foaming body of molten condition fill whole die cavity;

(5) cooling and shaping: with the secondary mold cools down to 30-40 ℃;

(6) die sinking: take out the surfboard finished product.

These plastics comprise the plastic cement that ethylene vinyl acetate (EVA), polyethylene (PE) plastic cement or its mixture form; The die cavity of this mould and secondary mould, its both sides are provided with towards connecing the gradually wide hypotenuse of loft, and its butt joint forms the spatial accommodation of " ㄑ " type; The heating-up temperature of this mould is 150-170 ℃, and the time is 30-40 minute; The heating-up temperature of this secondary mould is 160-180 ℃, and the time is 10-15 minute; Be mixed with down routine composition in this plastic cement: blowing agent, bridging agent, filler, auxiliary agent and colorant.

Major advantage of the present invention is:

1, integral formation method of the present invention is the small plastic blank plate 31 that plastics 30 severing stamps is surfboard 20 shapes, one time mould 40 forms the blank plate 50 that partly foams, secondary mould 60 forms complete full structure, die sinking again behind the abundant cooling and shaping in secondary mould 60, make and possess the surfboard finished product 20 of stablizing complete profile, processing procedure is simplified, and reduces the waste of manpower and materials.

2, forming method of the present invention is to make small-sized plastics blank plate 31, the medium-sized blank plate 50 that partly foams all has the outward appearance of surfboard shape, the specific die cavity design of its cutter sanction type, mould 40 and secondary mould 60, the surfboard external form is controlled effectively, with the moulding gradually of interim gradual and orderly approach, it is splendid that its quality appearance all reaches.

3, the design of secondary mould 60 of the present invention forms full complete integrated formed structure body, and shaping pattern, color or pattern have exquisite moulding and outward appearance simultaneously.

4, forming method of the present invention only when cutting plastics blank plate, produces leftover bits, and Yin Qishang does not foam, and can all recycle, and the no wastage of material and the three wastes are handled.

5, forming method of the present invention; adopt the die cavity of closed, seawater and organic drawback are not inhaled in the complete foaming body inside that is present in of pore; and the sealing die cavity has the inner foaming body of protection and improves the product effect in service life at the protective layer of finished surface formation higher density.

6, die cavity of the present invention is provided with the spatial accommodation that is " ㄑ " type, and the protection product has regular external form.

Further specify below in conjunction with preferred embodiment and accompanying drawing.

Fig. 1 is manufacturing process flow diagram commonly used.

Fig. 2 is fabrication schedule action schematic diagram commonly used.

Fig. 3 is the schematic perspective view of product commonly used.

Fig. 4 is a manufacturing process flow diagram of the present invention.

Fig. 5 is the plastics schematic diagram that cuts of the present invention.

Fig. 6 goes into the one-off pattern schematic diagram for of the present invention.

Fig. 7 is the blank plate stereogram that partly foams of the present invention.

Fig. 8 goes into two apotype schematic diagrames for of the present invention.

Fig. 9 is a secondary mould foaming generalized section of the present invention.

Consult Fig. 4, Fig. 5, forming method of the present invention comprises the steps:

(1) cut plastics blank plate: plastics of the present invention are often selected ethylene vinyl acetate (EVA), polyethylene (PE) or its mixture for use, sneak into the plastics 30 of the formation such as blowing agent, bridging agent, filler, auxiliary agent and colorant of predetermined ratio again, its proportioning of sneaking into is prior art, so do not describe in detail, utilization have predetermined close-shaped cutter with plastics 30 with length feed mode severing stamp, cut plastics blank plate 31, as shown in Figure 5, cut all leftover bits and pieces of material 32 that blank plate 31 produces, owing to be, can all recycle without the plastic raw materials of foaming;

(2) go into pressurized, heated in mould; Blank plate 31 is inserted in mould 40, the pressurized, heated foaming, consult Fig. 6, in the upper and

lower mould

41 and 42 of a mould 40, be provided with the die cavity 43 that can dock and have the surfboard contour shape, heating-up temperature 150-170 ℃, 30-40 minute heat time heating time, blowing agent is decomposed produce the foaming and intumescing effect, its counterdie 42 is fixed on the base 44, and patrix 41 utilizes the piston rod 45 of hydraulic press to exert pressure downwards, this upper and

lower mould

41 and 42 around send out hole 46 arranged, be used to import steam, its heating and heating schedule are prior art, so do not describe in detail;

(3) the blank plate that partly foams is taken out in die sinking: the blank plate 50 that partly foams is taken out in die sinking, and its volume is 6-10 a times of this plastics blank plate 31, forms to have the shape of surfboard;

(4) go into heating pressurization in the secondary mould: be provided with the upper and

lower die cavity

611 and 621 that can dock and have surfboard 20 complete shapes in the upper and

lower mould

61 and 62 of secondary mould, consult Fig. 3, the face shaping of surfboard 20 comprises the nose 21 by Bao Jianhou, both sides are the edge 22 of " ㄑ " type, and the empennage 23 brought together of concave arc shape, end face 24 predeterminable three-dimensional asperities, pattern or trade marks anti-skidding or attractive in appearance; Consult Fig. 8, the formation method at the edge 22 of its " ㄑ " type is in upper and

lower die cavity

611 and 621, set up separately in advance towards connecing the spatial accommodation that is " ㄑ " type that the gradually wide hypotenuse of loft 63 64 forms both sides, the blank plate 50 that will partly foam is inserted pressurized, heated foaming in two apotypes 60, heating-up temperature is 160-180 ℃, be 10-15 minute heat time heating time, blowing agent produces the foaming and intumescing effect, its volumetric expansion 2-3 doubly, consult Fig. 9, heating is expanded inner air and is produced interior the pressure, make the foaming body of molten fill whole die cavity, forms complete full structure;

(5) cooling and shaping: the steam in the hole 65 is released, the cooling water that reinjects, temperature is 30-40 ℃, makes foaming body 20 abundant cooling and shapings.

(6) die sinking: take out surfboard finished product 20 with complete integrated formed structure.

Method of the present invention is made the integrated surfboard finished product with complete profile, has the effect that shortens fabrication schedule, reduces waste material and raising quality.

Claims

1, a kind of integral formation method of surfboard is characterized in that this forming method in turn includes the following steps:

(5) cooling and shaping: with the secondary mold cools down to 30-40 ℃;

(6) die sinking: take out the surfboard finished product.

2, integral formation method according to claim 1 is characterized in that: these plastics comprise the plastic cement that ethylene vinyl acetate (EVA), polyethylene (PE) plastic cement or its mixture form.

3, integral formation method according to claim 1 is characterized in that: the die cavity of this mould and secondary mould, its both sides are provided with towards connecing the gradually wide hypotenuse of loft, and its butt joint forms the spatial accommodation of " ㄑ " type.

4, integral formation method according to claim 1 is characterized in that: the heating-up temperature of this mould is 150-170 ℃, and the time is 30-40 minute.

5, integral formation method according to claim 1 is characterized in that: the heating-up temperature of this secondary mould is 160-180 ℃, and the time is 10-15 minute.

6, integral formation method according to claim 1 is characterized in that: be mixed with following ingredients in this plastic cement: blowing agent, bridging agent, filler, auxiliary agent and colorant.