TW396103B - Method of integral molding of surfboard - Google Patents

Abstract

This is a ntegral moldingmethod of a surfboard that cuts the plastic material into mini plastic model board in a surfboard shape. The plastic material is foaming by thermal pressing with a first mold in a surfboard pre-shape. Then, plastic material is foaming by thermal pressure with a second mold to form in a complete surfboard shape. Finally, the second mold is allowed to cool and the foamed articles fixes inside the mold before opening it again. This arrangement allows us to manufacture surfboards with a perfect appearance, reduces the manufacturing time, and decreases wasting raw aterials.

Description

Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperative, V. Creative Instructions () No. 86110053 "One Surfing Body Forming Method" Invention Patent Case Supplementary Explanation The present invention is a plastic made of EVA, PE or its mixture, and is scheduled to be mixed The plastic 30 formed by the proportion of foaming agent, bridging agent, filler, auxiliaries and pigments, etc., uses a cutter with a predetermined closed shape blade to cut the plastic 30 into a small plastic that is a surfboard. The prototype plate 31 is repeatedly heated and foamed with a primary mold 40 having a cavity 43 in the shape of a surfboard to form a semi-foamed prototype plate 50. Then, a secondary mold 60 having the complete shape of the surfboard 20 is continuously added. Pressure heating and foaming to form a complete and full structure; Finally, the secondary mold 60 is sufficiently cooled at a relatively cold temperature and the hair is made. The foam is fully shaped in the mold and then opened to complete the mold. The finished surfboard 20 is finished. The characteristics of the present invention are mainly that the small plastic prototype plate 31 and the medium-sized semi-foam prototype plate 50 have the appearance of a surfboard shape with less manufacturing processes; The specific cavity shape design of the secondary mold 60 enables the shape of the surfboard to be effectively controlled, and is gradually formed in a step-by-step, progressive manner according to the actual need degree, so as to obtain a person with good appearance and finished products. The plastic used in the present invention is the same as that disclosed in the creative background of the description. Commonly used plastics such as EVA (Ethylene Vinyl Acetate Copolymer), PE (Polyethylene Resins) or mixtures thereof are mixed with a predetermined proportion of blowing agent (Blowing Agent). , Bridging agent (Vulcanizing Agent), filling agent (Filler Agent), auxiliaries (Aids Agent) and pigment (Pigment) and other materials for this, and China's current industry regardless of foaming surfboards and footwear manufacturing For those who are familiar with this world's bull ears, for those who are familiar with this technology, for ____ page.1 (b. 0 paper size applies to China National Standards (CNS) A4 specifications (210X297 mm) 1 I— n I l · — I IK1 I Is II (please read fl first, fill in this page before filling this page) Order

Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperative, V. Creative Instructions () No. 86110053 "One Surfing Body Forming Method" Invention Patent Case Supplementary Explanation The present invention is a plastic made of EVA, PE or its mixture, and is scheduled to be mixed The plastic 30 formed by the proportion of foaming agent, bridging agent, filler, auxiliaries and pigments, etc., uses a cutter with a predetermined closed shape blade to cut the plastic 30 into a small plastic that is a surfboard. The prototype plate 31 is repeatedly heated and foamed with a primary mold 40 having a cavity 43 in the shape of a surfboard to form a semi-foamed prototype plate 50. Then, a secondary mold 60 having the complete shape of the surfboard 20 is continuously added. Pressure heating and foaming to form a complete and full structure; Finally, the secondary mold 60 is sufficiently cooled at a relatively cold temperature and the hair is made. The foam is fully shaped in the mold and then opened to complete the mold. The finished surfboard 20 is finished. The characteristics of the present invention are mainly that the small plastic prototype plate 31 and the medium-sized semi-foam prototype plate 50 have the appearance of a surfboard shape with less manufacturing processes; The specific cavity shape design of the secondary mold 60 enables the shape of the surfboard to be effectively controlled, and is gradually formed in a step-by-step, progressive manner according to the actual need degree, so as to obtain a person with good appearance and finished products. The plastic used in the present invention is the same as that disclosed in the creative background of the description. Commonly used plastics such as EVA (Ethylene Vinyl Acetate Copolymer), PE (Polyethylene Resins) or mixtures thereof are mixed with a predetermined proportion of blowing agent (Blowing Agent). , Bridging agent (Vulcanizing Agent), filling agent (Filler Agent), auxiliaries (Aids Agent) and pigment (Pigment) and other materials for this, and China's current industry regardless of foaming surfboards and footwear manufacturing For those who are familiar with this world's bull ears, for those who are familiar with this technology, for ____ page.1 (b. 0 paper size applies to China National Standards (CNS) A4 specifications (210X297 mm) 1 I— n I l · — I IK1 I Is II (please read fl first, fill in this page before filling this page) Order

V. Creative Instructions () I believe that the physical properties and formula of these basic raw materials can be easily understood. Please refer to the attachment—shown here is a gas measurement table for an experiment in a possible embodiment of the present invention, which shows the difference in reaction time and the control of the amount of gas generated; where the curve (A) ( B) (C) is the conventional action situation, which usually causes the foaming agent to quickly decompose within a short period of time, while the experimental curve (D) of the present invention uses dual control of temperature and time to make foaming The decomposition rate of the agent is slowed down, so it is not difficult to control and operate the entire foaming effect. Please refer to Annex II, which is a photograph of the experimental sample of the present invention, including small plastic prototypes, medium-sized semi-foam prototypes, and surfboards in various stages with a complete appearance and shape, which can prove that the invention is indeed applicable. Achieved the expected effect 9 Attachment 1: Gas measuring table of one embodiment of the present invention: Photograph of experimental sample of the present invention. (Please read the note $ on the back before filling this page) Order W Central Printing Bureau of the Ministry of Economic Affairs: Printed by Industrial and Consumer Cooperatives (CNS) _ (21f29H.:

V. Creative Instructions () I believe that the physical properties and formula of these basic raw materials can be easily understood. Please refer to the attachment—shown here is a gas measurement table for an experiment in a possible embodiment of the present invention, which shows the difference in reaction time and the control of the amount of gas generated; where the curve (A) ( B) (C) is the conventional action situation, which usually causes the foaming agent to quickly decompose within a short period of time, while the experimental curve (D) of the present invention uses dual control of temperature and time to make foaming The decomposition rate of the agent is slowed down, so it is not difficult to control and operate the entire foaming effect. Please refer to Annex II, which is a photograph of the experimental sample of the present invention, including small plastic prototypes, medium-sized semi-foam prototypes, and surfboards in various stages with a complete appearance and shape, which can prove that the invention is indeed applicable. Achieved the expected effect 9 Attachment 1: Gas measuring table of one embodiment of the present invention: Photograph of experimental sample of the present invention. (Please read the note on the back before filling in this page) Order the Central Bureau of Standards of the Ministry of Economic Affairs w: Printed by the Industrial and Consumer Cooperatives (CNS) _ (21f29H.: Printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 5. Description of the invention (1) The present invention is related to surfboards, and more specifically, it refers to a kind of waste that makes the foam of surfboards without waste during the manufacturing process, and its structure and shape can be integrally formed. According to the press, the surfboard sport has become very popular at home and abroad, because the surfboard does not need to carry heavy machinery and equipment, and does not need to provide oil energy; Therefore, it has the convenience of being lightweight and easy to carry without environmental pollution. And ecological problems, let alone bear the noise of the rumbling engine noise; therefore, in general beaches or beaches, people can see surfboard movements, and when there are big waves, wave-by-wave, wave-by-wave, dynamic, intense impact sports ; Xiaolang can be used as a floating board, lying on it, enjoying the leisure and fun of natural fluctuations, which is very popular with consumers. And one kind is EVA, PE or its mixture. The foam body made of plastic is the body's surfboard, and its manufacturing method is shown in the first figure; system, (1) first cut plastic 1 into a rectangle; the plastic is made of EVA (Ethylerie Vinyl Acetate Copolymer), PE (Polyethylene Resins) or its plastic, mixed with a predetermined proportion of blowing agent, bridging agent, filling agent, auxiliary agent, and pigment Wait for the material to form the plastic 1, as shown in the second figure (a), cut it into a large rectangular body. (2) Put the plastic 1 into the primary mold 2 and press g to foam; As shown in Figure (b), the cavity 3 in the mold is rectangular, the heating temperature is about 180 ° C, and the heating time is about 30 minutes, so that the foaming agent is decomposed to produce foaming and expansion. (3) Open the mold and take out half Foam material 4, as shown in the second picture (c), at this time half page 3 (Please read the precautions on the back ^: write this page) Φ. The size of the paper is applicable to China National Standards (CNS) Specification of Λ4 (210X297 mm) Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 _B7_ V. Description of the invention (2) 4 ratios of foam material Material 1 expands approximately 6 to 10 times its volume and also forms a rectangular body. (4) Put the semi-foamed material 4 into the secondary mold 5 and heat and foam it under pressure, as shown in the second figure (d), The heating temperature is about 16 (TC, and the heating time is about 30 minutes, so that the remaining foaming agent continues to decompose, and the foaming expansion effect is generated. It is re-expanded to the first 2 to 3 times the volume. (5) Cooling and setting, Cool the secondary mold 5 to about 120 ° C. (6) Open the mold and take out the foamed material 6 that has been foamed. After the mold is opened and the pressure applied to the mold is released, the foamed material 6 is still at 120. At a high temperature of about ° C, it will expand about 15% of the volume of the secondary mold at the moment of mold opening. Then, the foamed material 6 is taken out of the mold and placed in an appropriate cooling rack or table to cool naturally, and the temperature is reduced to room temperature. At the same time, its volume will shrink by about 5% again; as shown in the second figure (e), the foamed material 6 also forms a long rectangular body with a large area, and its volume is about 3 to 5 times that of a general surfboard; The expansion and contraction of the foamed material 6 outside the mold can easily cause an unsightly phenomenon in the skin. (7) Cut out the foam material 6; as shown in the second figure (0), take the large area of foam material 6, and use a cutter with a predetermined closed shape blade to feed the foam material 6 in a longitudinal direction. Cut the punching pattern, remove the foam board 7 with the surfboard prototype, and remove the remaining material δ to form excess waste. (8) Cut the slope of the nose of the foam board; see the second figure (continued) g), a large knife (not shown) is used to remove the bottom layer 9 of the front nose end of the foam board 7 by a predetermined range, so that the front nose end of the foam board 7 has a thin and gradually thickened shape to improve the surfboard. The maneuverability during surfing, but the 'bottom layer 9' which has been cut off, forms excess waste. Page 4 This paper size applies Chinese national standards (CNS &gt; A4 specifications (210X297 mm)) (Please read the precautions on the back first_ 1 ^. Installation-fill in this page) Order A7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (3) (9) Cutting the edge angle of the foam board; as shown in the second figure (h), Using a cutter (not shown), the side of the foamed board 7 is cut from the original longitudinal section 10 into a shape of < The edge 11 is used to increase the flexibility of control during surfing; the stripped sheet 12 once again forms excess waste. (10) Placed in a three-dimensional setting, because the cut part of the foam board 7 is not smooth and neat, Therefore, it is necessary to insert the mold three times and apply a lower degree of pressure and heating to make the surface of the cut part smoother and smoother; however, due to the difference between the front-end molding and the rear-end shaping conditions, it is not The color of the cut part and the cut part will form different shades of shade. (11) Open the mold and take out the finished surfboard 20 as shown in the third figure. Through the above description, 'Complete manufacturing of known conventional surfboards' The steps are described as follows: 1. There are many and complicated manufacturing steps. The shape of the surfboard must rely on the punching process of step (7) and steps (8) to (9). ) Step to trim the surfboard to produce the shape of the surfboard. It is necessary to go through the three steps of step (10) to waste the man-hours. 2. The punching and trimming process causes a lot of waste, as in (7). The punching step of the step) generates a lot of waste of the side material 8 'and the ( 8) The inclination of the nose end of the cutting foamed plate 7 in the step, which results in the waste material from which the bottom layer 9 is cut off, and the angle of the edge of the cutting foamed plate 7 in the step (9), which results in the excess waste material from the sheet 12 which has been removed. There are quite a lot of accumulated waste materials, and these waste materials are high-rate foams with large volume and too much gas contained in the interior. There are not many plastics that can be effectively recycled. They are usually buried by burning or landfilling methods. For garbage disposal and the environment Page 5 Z Pack ------ Order ------ ^ Travel to fill in this page) This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) Central Standard of the Ministry of Economic Affairs Bureau Cooperative Consumers' Co-operative Printing A7 ___B7_ V. Description of Invention (4 :) The protection issues have adverse effects. 3. In addition, as for the surfboard made by the conventional manufacturing method, after the foamed board is cut by a cutter, the cut surface will destroy the original closed air cell unit, form open cells, and absorb seawater. And organic organisms, in addition to adding unnecessary weight to the surfboard and making it difficult to dry, the reproduction of organic organisms will also generate side effects such as bad odors; and placing it into the three-dimensional molding as described in step (10) will still cause The color of the uncut part and the cut part form unsightly phenomena with different colors. In view of this, the inventor of this case has carefully considered and accumulated many years of research and development experience in surfboards, and finally has the birth of the invention β. That is, the main purpose of the invention is to provide a body of surfboards. The molding method has fewer manufacturing processes, which can effectively shorten the manufacturing process and achieve the effect of reducing manpower and material resources. A secondary object of the present invention is to provide a method for forming a body of a surfboard. The foam does not need to be punched and trimmed. Therefore, there is no waste problem caused by the user. It is very economical and Environmental protection and other industries use price makers. In order to further understand the technical means used in the present invention and the expected effects, a preferred embodiment will be described in detail with the drawings as follows: 'I believe the above-mentioned objects, features, and other features of the present invention' can be obtained in-depth And specific understanding. Brief description of the drawing: The 6th purchase of this paper button applies to the Chinese standard (CNS) eight-year-old (210x297 male) &quot; (Please read the precautions on the back first. 4r fill in this page to order ^ .vi A7 B7 V. Description of the Invention (5) The first picture is a manufacturing flow chart of a conventional surfboard. The second picture is a schematic diagram of the manufacturing action of a conventional surfboard. The third picture is a perspective view of a conventional surfboard. The fourth picture is a manufacturing process of the present invention. The fifth figure is a schematic view of the plastic cutting shape of the present invention. The sixth figure is a schematic view of the inserting mold of the present invention. The seventh figure is a perspective view of the semi-foamed prototype plate of the present invention. Schematic diagram of the secondary mold. The ninth figure is a schematic diagram of the foaming profile of the secondary mold of the present invention. The comparison drawing number in the printed drawings of the staff consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs: 1. Plastic 2 Foam material 5 Secondary mold 6 Foam material 7 Foam board 8 Side material 9 Bottom layer 10 Vertical section 11 Edge 12 Sheet 20 Surfboard 21 Nose end 22 Edge 23 Tail 24 Top surface 30 Plastic 31 Plastic prototype board 32 sides Material 40 a Mould 41 Upper mould Page 7 This paper size applies to Chinese national standards (CNS &gt; A4 size (210X297 mm) A7 B7 V. Description of the invention (6> 42 lower mould 43 mould cavity 44 base 45 movable rod 46 hole 50 half Foam prototype plate 60 Secondary mold 61 Upper mold 611 Upper mold cavity 62 Lower mold 621 Lower mold cavity 63 Receiving mold line 64 Beveled edge 65 Hole (Please read the precautions on the back first_

Please refer to the fourth and fifth figures. The one-body forming method of the surfboard of the present invention includes: (1). Plastic is first cut; plastic made of EVA, PE or its mixture is mixed in a predetermined ratio. The plastic 30 formed by the foaming agent, bridging agent, filler, auxiliary agent and coloring material, etc., uses a cutter with a predetermined closed shape blade, as shown in the fifth figure, the plastic 30 is longitudinally fed. Cutting punch, small plastic prototype board 31 which is a surfboard: the edge material 32 formed around the prototype plastic board 31, because it is a plastic raw material without foam bridge, so it can all be recycled and made into plastic 30 use. (2) Pressurized heating in a primary mold, which is to place the plastic prototype plate 31 into the primary mold 40 under pressure heating and foaming; please refer to the sixth figure, in this embodiment, the primary mold 40 is used. The upper mold 41 and the lower mold 42 are provided with a mold cavity 43 that can be connected to have a contour shape of the surfboard. The shape of the mold cavity 43 is designed to reduce the proportion of the appearance of the finished surfboard 20; The paper size of this page applies the Chinese national standard (CNS &gt; A4 size (2 丨 0X297mm))

JJ Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives, printed by the Consumers Cooperatives of the Middle Clip Standards Bureau of the Ministry of Economic Affairs, printed A7 B7__V. Description of the invention (7) The plate 31 is placed in a primary mold 40 and heated under pressure to foam. 150 ° C ~ 170 ° C, heating time is about 30 ~ 40 minutes, and the foaming agent will be decomposed to produce foaming expansion effect. In this embodiment, the pressure of the mold fixes the lower mold 42 to the base 44 and the upper mold 41 The piston rod 45 of the hydraulic cylinder is actuated downwards to carry out the procedure of clamping and pressure clamping. In addition, a number of holes 46 are provided at predetermined positions of the upper mold 41 and the lower mold 42 to input heat energy, such as steam input or insertion. The electric heating pipe can be used to perform the heating process. Since it is a conventional technology, detailed details will not be repeated. (3) Open the mold and take out the semi-foamed prototype plate 50. After the mold is opened, it will continue to expand and expand outside the mold until the semi-foamed prototype plate 50 expands about 6 to 10 times the volume of the plastic prototype plate 31, and also forms A semi-foamed prototype 50 in the shape of a surfboard. (4) Pressurized heating in the secondary mold, which is to place the semi-foamed prototype plate 50 into the secondary mold 60, and then pressurize and heat the foam. The mold 62 is provided with an upper mold cavity 611 and a lower mold cavity 621 which can be connected to have the complete shape of the surfboard 20; the shapes of the upper and lower mold cavities 611 and 621 are designed to match the appearance of the finished surfboard 20, such as the third As shown in the figure, the outer shape of the surfboard 20 further includes a thinner and thicker nose 21, the sides 22 having a <shaped edge 22, and a concave arc-shaped tail fin 23; In addition, the surfboard top surface 24 can also be Pre-designed three-dimensional concave-convex lines, patterns or logo designs for anti-slip or aesthetic design; as shown in the eighth figure, the edge 22 of the <type is in the upper mold cavity 611 and the lower mold cavity 621, and is divided in advance on both sides The sloping edge formed by the sloping edge 64 gradually widening toward the mold line 63 is a <-shaped accommodating space; the semi-foamed prototype plate 50 is set to 9 pages. This paper rule is not applicable to Chinese national standards (CNS &gt; A4 specifications ( 210X297 mm> Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (8) Continued in the second mold Pressure heating and foaming, the heating temperature is about 160 ~ 180 ° C, and the heating time is about 10 ~ 15 minutes, so that the remaining foaming agent will continue to decompose, and the foaming expansion effect will occur, making it re-expand 2 to 3 times the first time. Volume Γ In this embodiment, the pressure heating structure of the mold is the same as that of the primary mold 40, and the heating is performed by the number of holes 65 at predetermined positions of the upper mold 61 and the lower mold 62 to input heat energy; As shown in FIG. 9, the present invention utilizes the restriction of the closed mold cavity of the secondary mold 60 to “expand the air inside the semi-foamed prototype plate 50 by heating” to generate an internal pressure to squeeze the molten foam on the periphery and to the mold. The space between the holes flows to fill the entire mold cavity with 塡, including the 型 -shaped accommodating space formed by the hypotenuse 64 to form a complete structure. (5) Cooling and setting, the cooling of this embodiment is to make the holes 65 The steam inside is vented, and then the cooling water is injected. The cooling temperature is controlled at a low temperature, about 30 ~ 40 ° C, so that the foam in the secondary mold 60 is fully cooled and shaped in the mold. (6 ) Open the mold and take out the finished surfboard 20 with complete appearance. The above is a description of the steps and technical characteristics of the one-body forming method of the surfboard of the present invention; then 'the effect expected of the present invention is stated as follows: The main technical means mainly used in the present invention is to cut plastic 30 A small plastic prototype 31 with a shape of a surfboard; a primary mold 40 having a cavity 43 in the shape of a surfboard is heated and foamed under pressure to form a semi-foamed prototype 50; then, a surfboard 20 is provided. The secondary mold 60 of the complete shape continues to be heated and foamed under pressure to form a complete structure. Finally, the secondary mold 60 is cooled sufficiently at a cooler temperature, and the foam is Applicable to China National Standard (CNS) M specifications (2 丨 0X297 mm) (Please read the precautions on the back to write this page)

A7 Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs ____ B7_ V. Description of the invention (9) Fully set in the mold and then open the mold to make a finished surfboard 20 with a complete appearance; its manufacturing process is small and effective Shorten the process and achieve the effect of reducing manpower and material resources. The secondary technical means mainly used in the present invention is to make the small plastic I-shaped plate 31 and the medium-sized semi-foamed prototype plate 50 both have the appearance of a surfboard shape; and, in the cutting of the cutter, the primary mold 40 and the second The specific cavity shape design of the secondary mold 60 enables the appearance of the surfboard to be effectively controlled, and gradually forms the person in a stepwise and progressive manner according to the actual needs. Another technical means mainly used in the present invention is to restrict the closed cavity after the secondary mold 60 is closed. When the mold is heated, the air inside the foam is expanded to produce an internal pressure and squeeze the outer molten state. The foamed body flows into the cavity of the cavity, and fills the entire cavity, in addition to forming a full and complete structure; and enables the shape, pattern, color and pattern of the surfboard 20 to be integrally formed into one piece, which is good. Appearance and finished product. In addition, the present invention is to cut and punch the plastic 30 to form a small plastic prototype plate 31 which is a surfboard; the edge material 32 formed around the prototype plastic plate 31, because the structure is not foamed, it can be all It is recycled and then made into plastic 30 materials. In addition, after the foaming is completed, the process of punching and trimming as required by the user is not required, so there is no side material and bottom layer produced by the user. 9 and sheet 12, etc., which are waste materials, so the present invention is economical and environmentally friendly. Due to the limitation of the closed mold cavity in the present invention, air cells exist in the foam body 30 intact, and no conventional air cells can be cut off and produced. (The paper size of this page applies Chinese National Standard (CNS) Α4 specification (210X297 mm) H-JIH-II-— ^ n I (please read ^ Note on the back ^ 'fill out this page) Order A7 B7 V. Description of the invention (10) It becomes heavy after absorbing water, or Poor drying results in odor; in addition, the internal pressure generated by the expansion of the air inside the foam 30 of the present invention will squeeze the foam 30 and form a higher density protective skin layer on the surface in contact with the cavity, Since the protective skin layer is not cut off, it is possible to maintain the complete appearance of the finished product and to protect the internal foam to improve the service life of the product. It should be further stated that the primary mold 40 of the present invention can also be used as Like the secondary mold 60, the beveled space 64 is used to form a "shaped" accommodation space, so that the appearance of the product can be controlled more accurately and easily. In summary, the present invention has its extreme advantages in similar products. Good progress practicality while searching Internal and external technical information and literature on such structures have not been found to have the same technology first, which is obviously novel; therefore, the present invention already has the elements of an invention patent, and the application is made according to law. However, the above , Are only the preferred and feasible embodiments of the present invention, and any other equivalent structural changes for the application of the present specification and the scope of patent applications, such as increasing the number of times the mold is inserted into the present invention, or changing heating or cooling The conditions and the like are also feasible, so it should be included in the scope covered by the patent application of the present invention. -----_--- :! Equipment II (please read the notes on the back of f first, write this page) Order

JJ Central Government Bureau of Standards, Ministry of Economic Affairs, Consumer Co-operation, Du Print Pack, 12th Buy This paper size applies to China National Standard (CNS) A4 specifications (2 丨 OX297 mm)

Claims (1)

Ministry of Economic Affairs_Central Bureau of Standards printed A8, B8, C8, D8 for consumer cooperatives VI. Scope of patent application 1. A surfboard one-body molding method, which includes the following steps: (1). First cut the plastic; use EVA The plastic formed by PE plastic or its mixture is cut and punched into a small plastic prototype plate shaped like a surfboard; (2) It is heated under pressure in a primary mold, which is placed in the primary mold. Pressure heating and foaming; The upper and lower molds of the primary mold are provided with cavities that can be connected to form a surfboard shape; (3) Open the mold to take out the semi-foamed prototype plate; (4) Enter the secondary mold Pressure heating is to place the semi-foamed prototype plate into a secondary mold and then heat and foam it under pressure. The upper mold and lower mold of the secondary mold are provided with a complete shape that can be connected to the surfboard. Mold cavity; heating to expand the air inside the semi-foamed prototype plate to produce an internal pressure to squeeze the molten foam around the periphery, flowing to the cavity of the mold cavity to fill the entire mold cavity; (5) cooling and setting, making two The secondary mold is cooled to a temperature between about 30 and 40 (6) opening the mold, remove the finished surfboard. 2. A method for forming a body of a surfboard according to item 1 of the scope of the patent application, wherein the cavity of the secondary mold when the upper mold and the lower mold are set in advance is gradually widened on both sides of the secondary mold toward the mold line. The hypotenuse is formed by the butt joints. 3. According to a one-piece molding method of a surfboard described in item 2 of the scope of the patent application, wherein the primary mold also has a <-shaped accommodating space such as a secondary mold. The 131st paper New Zealand is applicable to ts countries ^ (CNS) from thief _ (21 () &gt; &lt; 297 mm) ~-(Please read the precautions on the back first to write this page) Order A8 68 C8 D8 ττ, application 4. The method of forming a body of a surfboard according to item 1 of the scope of patent application, wherein the heating of the primary mold is such that the heating temperature reaches about 150t to 170 ° C, and the heating time is about 30 to 40. Minute. 5. The one-piece molding method for a surfboard according to item 1 of the scope of the patent application, wherein the heating of the secondary mold is to achieve a heating temperature of about 160 to 180 ° C and a heating time of about 10 to 15 minutes. 6. A method for forming a body of a surfboard according to item 1 of the scope of the patent application, wherein the plastic is made of EVA or PE plastic and mixed with a predetermined proportion of a foaming agent, a bridging agent, a filler, an auxiliary agent and Formed by pigments and other materials. 1 ^ ------ · 1, strike! (Please read the notes on the back of this page first *) -s Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economy Page 14 This paper size applies to Chinese national standards (CNS> A4 size (210X297 mm) First picture Fourth picture 30 50 Seventh picture Figure Eight Ninth picture