201036858 六、發明說明： 【發明所屬之技術領域】 本發明係與自行車座墊有關，特別是指一種自行車座 墊之製法。 【先前技術】 自行車騎士與自行車之間最直接接觸的地方，除了握 〇 把以外就屬自行車座塾，自行車座墊-般可概分為硬式及 軟式座墊’硬式座墊常用於競技比賽用自行車，而軟式座 塾則常用於大眾曰常用自行車。而為了讓自行車之騎乘能 更為舒適，許許多多的自行車座塾都加強了符合人體工學 與預防運動傷害之設計。 例如一種習知之自行車座墊製法，主要是先將座墊之 外覆層以真空吸引方式貼附於模具之模穴内壁然後將二 種不同材質的彈性材料分別灌注到模穴内，使外覆層之内 ❹ 纟面先後堆疊^ +介層與-發泡層，再讓座墊内殼結合 於外覆層及發泡層而完成整體自行車座塾。利用上述製法 t成之自行車座墊結構包含了内殼，内殼設置發泡層，外 1：層Λ㈣④且包覆著發泡層，巾介層職於發泡層與外 覆層之間。當騎士坐在上述自行車座墊時，騎士的坐骨可 由具有彈性之中介層與發泡層所承受，不但能負擔著騎士 的重量，同時也可以讓騎士具有較為舒適之乘坐感。 ，然而、利用上述習知之自行車座墊製法時，由於外覆 層首先就被真工吸引力拉扯而附著於模穴内壁，使得外覆 3 201036858 層結構會隨著模穴形狀伸展而呈厚薄不均的狀態。若是模 穴裡具有深餘狀_，_时造_賴之外覆層 厚度較薄’強度較弱，同時座墊表面也會產生出不均勻光 澤與較差的成品外形。再者，因為彈性材料是直接灌注到 模具之模穴内’彈性材料賴穴岐動錢，巾介層會在 坐墊内呈現厚度分布不均句的狀態，當騎士坐在座塾時， 騎士若坐在中介層之厚度較薄的部位，就容易造成局部不 舒適的感覺。 【發明内容】 與較佳之成品外形 因此，本發明之主要目的乃在於提供-種自行車座墊 之製法，其所製成的自行車座墊表面可具有較均勻之光澤 、本發明之另—目賴在於提供-種自行車座墊之製 法，其所製叙自行車錢可具有厚度較為均勻的彈性 層，使騎士具有較為舒適的乘坐感。 今達成上述目的，本發明所提供自行車座墊之製法， 主要係以-第-模具與—第二模具所製成’該製法先將一 外覆層設於第—模具之—底座與—成形框U後注入 膠體於成形框之-中空部，用以使該外覆層具有一呈自行 車座墊狀之第-彈性層。f接著，將該外覆層移離該第一 模具，並且完全魏密合於該第二模具之-模穴，再以真 空吸引方式使該外覆層貼附於該模穴之内壁，然:後注入發 泡材料於賴朗，使該發泡材料與該第—彈性層相互結 201036858 合，並且於該模穴内形成一第二彈性層，最後將該上模閉 合於该下模，該座墊内殼即與該外覆層及該第二彈性 互結合。 仰 【實施方式】 以下茲配合圖式列舉若干較佳實施例，用以對本發明 之各步驟進行詳細說明，其中各圖式先簡要說明如下： 〇 -第圖係為本發明第一較佳實施例中第一模具之結構 示意圖。 、、口 ^第二圖係為本發明第一較佳實施例中外覆層設於第一 模具之底座的示意圖。 第三圖係為本發明第一較佳實施例中成形框設於外覆 層之上表面的示意圖。 第四圖將膠體注入成形框之示意圖。 第五圖係為第一彈性層成形於外覆層之示意圖。 © 第六圖係為第五圖中6-6剖線之剖視圖。 第七圖係為成形框移離於外覆層，第—彈性層設於外 覆層之示意圖。 β 、 第八圖係為本發明第一較佳實施例之示意圖，其中外 覆層覆蓋於模穴。 一第九圖係為本發明第一較佳實施例之示意圖，主要顯 示璧樞使外覆層密合於模穴周緣。 _第十圖係為本發明第一較佳實施例之示意圖，主要顯 不外覆層貼附於模穴之内壁。 5 201036858 第十一圖係為本發明第 發泡材料係注入模穴内。201036858 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a bicycle seat cushion, and more particularly to a bicycle seat cushion manufacturing method. [Prior Art] The most direct contact between the bicyclist and the bicycle is a bicycle seat in addition to the grip. The bicycle seat cushion can be divided into hard and soft cushions. The hard seat cushion is often used in competitive games. Bicycles, while soft-seats are often used in popular bicycles. In order to make the bicycle ride more comfortable, many bicycle seats have been enhanced with ergonomic and preventive sports injuries. For example, a conventional bicycle seat cushion manufacturing method mainly comprises first attaching a cover layer of the seat cushion to the inner wall of the mold cavity by vacuum suction, and then injecting elastic materials of two different materials into the cavity to respectively make the outer cover layer. The inner ❹ 纟 先后 ^ ^ ^ ^ ^ 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后 先后The bicycle seat cushion structure formed by the above method comprises an inner casing, the inner casing is provided with a foam layer, the outer layer is Λ(4)4 and is covered with a foam layer, and the towel layer is disposed between the foam layer and the outer layer. When the knight is sitting on the bicycle seat cushion, the knight's ischial bone can be supported by the elastic interposer and foam layer, which not only can bear the weight of the knight, but also give the knight a more comfortable ride. However, when the above-mentioned conventional bicycle seat cushion manufacturing method is used, since the outer covering layer is first pulled by the attraction of the real work and adhered to the inner wall of the cavity, the outer layer 3 201036858 layer structure is thick and thin depending on the shape of the cavity. The status of each. If there is a deep residual shape in the cavity, the thickness of the cladding is thinner than the thickness of the coating, and the surface of the cushion will also produce uneven light and poor finished shape. Moreover, because the elastic material is directly poured into the cavity of the mold, the elastic material will sway the money, and the towel layer will show a state of uneven thickness distribution in the seat cushion. When the knight is sitting in the seat, the knight is sitting. The thinner portion of the interposer is likely to cause a partial uncomfortable feeling. SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide a method for manufacturing a bicycle seat cushion, which can have a relatively uniform luster on the surface of the bicycle seat cushion, and another aspect of the present invention. The invention provides a method for manufacturing a bicycle seat cushion, which can have a relatively uniform thickness elastic layer, so that the rider has a more comfortable ride. In order to achieve the above object, the bicycle seat cushion provided by the present invention is mainly made of a -first mold and a second mold. The method is first to form an outer cover layer on the first mold and the base. After the frame U is injected into the hollow portion of the forming frame, the outer covering layer has a first elastic layer in the shape of a bicycle seat cushion. f, the outer cover layer is removed from the first mold, and is completely bonded to the mold cavity of the second mold, and the outer cover layer is attached to the inner wall of the mold cavity by vacuum suction, After the foaming material is injected into the Lailang, the foaming material and the first elastic layer are bonded to each other, and a second elastic layer is formed in the cavity, and finally the upper mold is closed to the lower mold. The inner cushion of the seat cushion is combined with the outer cover layer and the second elastic layer. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, a number of preferred embodiments are described in conjunction with the drawings to explain the steps of the present invention in detail. The drawings are briefly described as follows: 〇-图图 is the first preferred embodiment of the present invention. A schematic view of the structure of the first mold in the example. The second figure is a schematic view of the first embodiment of the present invention in which the outer cover is disposed on the base of the first mold. The third figure is a schematic view showing the forming frame provided on the upper surface of the outer cover in the first preferred embodiment of the present invention. The fourth figure shows a schematic view of the injection of the colloid into the forming frame. The fifth figure is a schematic view of the first elastic layer formed on the outer cover. © Figure 6 is a cross-sectional view of the 6-6 line in the fifth figure. The seventh figure is a schematic view in which the forming frame is moved away from the outer covering layer, and the first elastic layer is disposed on the outer covering layer. The eighth and eighth figures are schematic views of the first preferred embodiment of the present invention, wherein the outer cover covers the cavity. A ninth drawing is a schematic view of a first preferred embodiment of the present invention, mainly showing that the armature causes the outer cover to adhere to the periphery of the cavity. The tenth figure is a schematic view of a first preferred embodiment of the present invention, mainly showing that the outer layer is attached to the inner wall of the cavity. 5 201036858 The eleventh figure is the first foaming material of the present invention which is injected into the cavity.
第二模具之上模係閉合 丨穴八〜丄供丨尔闲合於下模。 第十二圖係為本發明第一 一較佳實施例之示意圖，其中 一較佳實施例之示意圖，其中 顯示自行車座墊半成品係移離於第二模具。 第十四圖類同於第五圖，係為本發明第二較佳實施例 一較佳實施例之示意圖，主要 中第一模具之剖視圖。 第十五圖係為本發明第二較佳實施例之示意圖，其中 顯示外覆層密合於模穴周緣。 第十六圖係為本發明第二較佳實施例之示意圖，其中 外覆層貼附於模穴之内壁。 第十七圖係為本發明第二較佳實施例之示意圖，主要 顯示出第一彈性層與第二彈性層之結合面概呈水平狀。 本發明第一較佳實施例所提供自行車座墊之製法，主 要係以一第一模具12(如第一圖所示)與一第二模具22(如 第八圖所示)製成。第一模具12包括一底座14與一成形框 16，成形框16内部具有一概呈自行車座墊形狀之中空部 18,如第四圖所示，中空部18之内壁面呈平面狀。第二模 具22包括有一下模23、一上模24與一設於下、上模、 24間之壓框25。下模23設有一模穴26，下模23具有較 而之/m度愿框25及上楔24皆可蓋合或掀離於下模23， 上模24具有一模仁27，模仁27可分離地設置—座墊内殼 32 °本明之製法包含有下列步驟： 201036858 一、如第二圖所示，製備一外覆層34置放在第一模具 12之底座14，外覆層34具有-上表面41與一下表面42。 一、如第三圖所示’將成形樞16設於外覆層34之上 表面41。 注入膠體於成形框16之中空部a，如第四圖所 不，使膠體填滿於中空部18，外覆層％之上表面41即可 成开乂出呈自行車座塾狀且具有均勻厚度之第-彈性層 36 ° Ο ❹ 四如第五至第七圖所示，使第一彈性層36位於第一 模” U之成她内―預定時間完全定_成後，將成 $框16移離於底座14，即可自第-模具12取下外覆層 34，上述預定時間最少為4分鐘。 五如第八圖所示，先使第二模具22之下模23呈開 放狀，並將外覆層34置放於第二模具22之下模23，外覆 層34係町表面42躺模穴％之方式平坦地覆蓋於模穴 26上方外覆層34之整體面積涵蓋至模穴％外緣，且第 一彈性層36位於對應模穴26之位置。 鬼麻第九圖所示，將壓框25蓋合於下模23，使外 4 〜下模23之模穴26周緣間相互密合。 壁面；ϋ十圖所示，下模23係為殼體，且模穴26内 :=广氣通道28，透過空氣通道28抽出模穴26 内的工乳即可使模穴26内 壓框25内之部份 真工I、進而吸引位於 外覆層34及第一彈即緊—附於模穴％之内壁， 彈後層36即可沿著模穴26之内壁面由平 7 201036858 面狀而變為立體之座墊形狀。 八、 如第十一圖所示，透過壓框25注入液態塑膠發泡 材料於下模23之模穴26内，使發泡材料與外覆層34之上 表面41及第一彈性層36相互結合，並且形成出一第二彈 性層38。第一彈性層36與第二彈性層38之結合面呈座墊 剖面之曲線狀。 九、 如第十二圖所示，將上模24閉合於下模23，使 模穴26内部呈閉模狀，座墊内殼32隨著上模24而與外覆 層34及第二彈性層38相互結合成座墊半成品。 十、如第十三圖所示，開啟上模24及壓框25，並且 取出座墊半成品’再經過修整超過座墊内殼32邊緣之外覆 層34以後，即可完成自行車座墊。 經過上述各製法之說明，由於第一彈性層36係先以第 一模具12成形於外覆層34,讓外覆層34與第一彈性層％ 相互結合以後’再放置到第二模具22由真空吸引附著在模 八26内壁，真空吸力會同時拉扯著外覆層％與第一彈性 層36。外覆層34被吸力拉扯而附著於模穴仏時，藉著第 -彈性層36本身所具有的彈力，以及與外覆層％之間的 結合力’第一彈性層36可減少外覆層34的延展性，使外 覆層Μ的厚度不會隨著敎26 _形狀而產生過度拉伸 之狀况，使得座墊可具有較佳之表面形狀與光澤，提高整 體座墊之成品品質。 再者，第—彈性層36先於外覆層34成形後具有較為 均勻之厚度’分佈也較廣，當騎士的蜂與座墊接觸 201036858 時，除了第一及第二彈性層36、38皆可承擔騎士重量以 外，第一彈性層36也能較為平均地提供彈力，強度較強， 讓座墊之表面各處皆提供較佳之騎乘舒適感。 另如第十四圖所示，係為本發明第二較佳實施例所提 供自行車座墊之製法，其製法與第一較佳實施例大致相 同，特點在於第一模具50之成形框51的中空部52截面形 狀概呈圓弧狀，成形於外覆層53之第一彈性層54表面亦 凸起之圓弧狀。如第十五圖及第十六圖所示，外覆層 自第一模具50移置於第二模具55，並使外覆層53被真空 吸力吸附於模穴56内壁之後，第一彈性層54也可因同時 被吸引而變形’第-彈性層54之表面即可概呈平面狀，如 第十七圖所示，第二彈性層57與第一彈性層54之結合面 亦可概呈平面狀。 【圖式簡單說明】 〇 第—圖係為本發明第—較佳實施例中第-模具之結構 示意圖。 m縣本發明第—較佳實施例巾外覆層設於第一 模具之底座的示意圖。 第二圖係為本發明第—較佳實施例中成形框設於外覆 層之上表面的示意圖。 第四圖將膠體注入成形框之示意圖。 第五圖係為第-彈性層成形於外覆層之示意圖。 第六圖係為第五圖中6-6剖線之剖視圖。 9 201036858 第七圖係為成形框移離於外覆層，第一彈性層設於外 覆層之示意圖。 第八圖係為本發明第一較佳實施例之示意圖，其中外 覆層覆蓋於模六。 第九圖係為本發明第一較佳實施例之示意圖，主要顯 示壓框使外覆層密合於模穴周緣。 第十圖係為本發明第一較佳實施例之示意圖，主要顯 示外覆層貼附於模穴之内壁。 第十一圖係為本發明第一較佳實施例之示意圖，其中 發泡材料係注入模穴内。 第十二圖係為本發明第一較佳實施例之示意圖，其中 第二模具之上模係閉合於下模。 第十二圖係為本發明第一較佳實施例之示意圖，主要 顯示自行車座墊半成品係移離於第二模具。 第十四圖類同於第五圖，係為本發明第二較佳實施例 中第一模具之剖視圖。 第十五圖係為本發明第二較佳實施例之示意圖，其中 顯示外覆層密合於模穴周緣。 第十六圖係為本發明第二較佳實施例之示意圖，其中 外覆層貼附於模穴之内壁。 第十七圖係為本發明第二較佳實施例之示意圖，主要 顯示出第冑性層與第二彈性層之結合面概呈水平狀。 201036858 【主要元件符號說明】 12第一模具 14底座 16成形框 18中空部 22第二模具 23下模 24上模 25壓框 26模穴 27模仁 28空氣通道 32座墊内殼 34外覆層 36第一彈性層 38第二彈性層 41上表面 42下表面 50第一模具 51成形框 52中空部 53外覆層 54第一彈性層 55第二模具 56模穴 57第二彈性層 11The mold base is closed on the second mold. Figure 12 is a schematic view of a first preferred embodiment of the present invention, wherein a schematic view of a preferred embodiment shows that the bicycle seat mat semi-finished product is moved away from the second mold. Fig. 14 is a view similar to the fifth drawing, which is a schematic view of a preferred embodiment of the second preferred embodiment of the present invention, mainly showing a cross-sectional view of the first mold. The fifteenth diagram is a schematic view of a second preferred embodiment of the present invention, wherein the outer cover is shown to be in close contact with the periphery of the cavity. Figure 16 is a schematic view of a second preferred embodiment of the present invention, wherein the outer cover is attached to the inner wall of the cavity. Figure 17 is a schematic view showing a second preferred embodiment of the present invention, mainly showing that the joint surface of the first elastic layer and the second elastic layer is substantially horizontal. The bicycle seat cushion provided by the first preferred embodiment of the present invention is mainly made up of a first mold 12 (shown in the first figure) and a second mold 22 (shown in Fig. 8). The first mold 12 includes a base 14 and a forming frame 16. The inside of the forming frame 16 has a hollow portion 18 in the shape of a bicycle seat cushion. As shown in the fourth figure, the inner wall surface of the hollow portion 18 is planar. The second mold 22 includes a lower mold 23, an upper mold 24, and a press frame 25 disposed between the lower and upper molds. The lower mold 23 is provided with a cavity 26, and the lower mold 23 has a lower/m-degree wish frame 25 and an upper wedge 24 which can be covered or detached from the lower mold 23, and the upper mold 24 has a mold core 27 and a mold core 27 Separably arranged - the inner cushion of the seat cushion 32 ° The method of the present invention comprises the following steps: 201036858 1. As shown in the second figure, an outer cover 34 is prepared and placed on the base 14 of the first mold 12, and the outer cover 34 There is an upper surface 41 and a lower surface 42. 1. The forming pivot 16 is disposed on the upper surface 41 of the outer cover 34 as shown in the third figure. The colloid is injected into the hollow portion a of the forming frame 16, as shown in the fourth figure, so that the colloid is filled in the hollow portion 18. The upper surface 41 of the outer covering layer can be opened and folded into a bicycle seat shape and has a uniform thickness. The first - elastic layer 36 ° Ο ❹ 4. As shown in the fifth to seventh figures, the first elastic layer 36 is placed in the first mode "U" into the inside - after the predetermined time is completely determined, it will become $ box 16 Moving away from the base 14, the outer cover 34 can be removed from the first mold 12. The predetermined time is at least 4 minutes. 5. As shown in the eighth figure, the lower mold 23 of the second mold 22 is first opened. And the outer cover layer 34 is placed on the lower mold 23 of the second mold 22, and the outer cover layer 34 covers the mold surface 42 in a manner of covering the mold cavity 26, and the entire area of the outer cover layer 34 covers the mold. The outer edge of the hole is located, and the first elastic layer 36 is located at the position corresponding to the cavity 26. As shown in the ninth figure of the ghost, the pressure frame 25 is covered on the lower die 23 so that the periphery of the cavity 26 of the outer 4 to the lower die 23 The wall is closed to each other. As shown in Fig. 10, the lower mold 23 is a casing, and the cavity 26 is: = wide air passage 28, and the working milk in the cavity 26 is extracted through the air passage 28. The inner portion I of the inner frame 23 of the cavity 26 can be attracted, and the inner cover 34 and the first elastic member can be attracted to the inner wall of the cavity. The rear layer 36 can be along the cavity 26 The inner wall surface is changed from a flat surface to a three-dimensional seat cushion shape. 8. As shown in the eleventh figure, the liquid plastic foam material is injected into the cavity 26 of the lower mold 23 through the pressure frame 25 to make the hair. The foam material is combined with the upper surface 41 of the outer cover 34 and the first elastic layer 36, and a second elastic layer 38 is formed. The joint surface of the first elastic layer 36 and the second elastic layer 38 is a curve of the seat cushion profile. 9. As shown in the twelfth figure, the upper mold 24 is closed to the lower mold 23, so that the inside of the cavity 26 is closed, and the inner cushion 32 of the seat cushion is along with the upper mold 24 and the outer cover 34 and The two elastic layers 38 are combined with each other to form a seat cushion semi-finished product. 10. As shown in Fig. 13, the upper mold 24 and the press frame 25 are opened, and the seat cushion semi-finished product is removed and then trimmed beyond the edge of the inner cushion shell 32. After 34, the bicycle seat cushion can be completed. According to the above various methods, since the first elastic layer 36 is first formed by the first mold 12 In the outer cover 34, after the outer cover layer 34 and the first elastic layer are combined with each other, 'replaced into the second mold 22 and attached to the inner wall of the die 8 by vacuum suction, the vacuum suction will simultaneously pull the outer cover % and the first An elastic layer 36. When the outer cover 34 is pulled by suction and adhered to the cavity, the elastic force of the first elastic layer 36 itself and the bonding force with the outer cover % 'the first elastic layer 36' The ductility of the outer cover layer 34 can be reduced, so that the thickness of the outer cover layer is not excessively stretched with the shape of the 敎26_, so that the seat cushion can have a better surface shape and gloss, and the overall seat cushion can be improved. The quality of the finished product. Furthermore, the first elastic layer 36 has a relatively uniform thickness after the outer cover layer 34 is formed, and the distribution is wider. When the knight's bee and the seat cushion contact 201036858, except for the first and second elastic layers 36 and 38, In addition to the weight of the knight, the first elastic layer 36 can also provide an elastic force on average, and the strength is strong, so that the surface of the seat cushion provides better riding comfort everywhere. Another embodiment of the present invention provides a method for manufacturing a bicycle seat cushion according to a second preferred embodiment of the present invention. The method for manufacturing the bicycle seat cushion is substantially the same as that of the first preferred embodiment, and is characterized by the forming frame 51 of the first mold 50. The hollow portion 52 has a substantially arc-shaped cross section, and the surface of the first elastic layer 54 formed on the outer cover 53 is also convex in an arc shape. As shown in the fifteenth and sixteenth drawings, the outer cover layer is moved from the first mold 50 to the second mold 55, and the outer cover layer 53 is vacuum-absorbed by the vacuum suction force on the inner wall of the cavity 56, the first elastic layer 54 can also be deformed by being attracted at the same time. The surface of the first elastic layer 54 can be substantially planar. As shown in FIG. 17, the joint surface of the second elastic layer 57 and the first elastic layer 54 can also be approximated. Flat. BRIEF DESCRIPTION OF THE DRAWINGS A first embodiment of the present invention is a schematic view of the structure of a first mold in the first preferred embodiment of the present invention. The present invention is a schematic view of the outer cover of the first embodiment of the present invention. The second figure is a schematic view of the forming frame provided on the upper surface of the outer cover in the first preferred embodiment of the present invention. The fourth figure shows a schematic view of the injection of the colloid into the forming frame. The fifth figure is a schematic view of the first elastic layer formed on the outer cover. The sixth drawing is a cross-sectional view taken along line 6-6 of the fifth figure. 9 201036858 The seventh figure is a schematic view of the forming frame being moved away from the outer cover layer, and the first elastic layer is disposed on the outer cover layer. The eighth figure is a schematic view of a first preferred embodiment of the present invention, wherein the outer cover covers the mold 6. The ninth drawing is a schematic view of a first preferred embodiment of the present invention, mainly showing a press frame for adhering the outer cover to the periphery of the cavity. The tenth drawing is a schematic view of a first preferred embodiment of the present invention, mainly showing that the outer cover is attached to the inner wall of the cavity. The eleventh drawing is a schematic view of a first preferred embodiment of the present invention in which a foamed material is injected into a cavity. Figure 12 is a schematic view of a first preferred embodiment of the present invention, wherein the mold over the second mold is closed to the lower mold. Fig. 12 is a schematic view showing a first preferred embodiment of the present invention, mainly showing that the semi-finished product of the bicycle seat cushion is moved away from the second mold. The fourteenth drawing is similar to the fifth drawing and is a cross-sectional view of the first mold in the second preferred embodiment of the present invention. The fifteenth diagram is a schematic view of a second preferred embodiment of the present invention, wherein the outer cover is shown to be in close contact with the periphery of the cavity. Figure 16 is a schematic view of a second preferred embodiment of the present invention, wherein the outer cover is attached to the inner wall of the cavity. Figure 17 is a schematic view showing a second preferred embodiment of the present invention, mainly showing that the joint surface of the second elastic layer and the second elastic layer is substantially horizontal. 201036858 [Main component symbol description] 12 first mold 14 base 16 forming frame 18 hollow portion 22 second mold 23 lower mold 24 upper mold 25 press frame 26 mold hole 27 mold core 28 air passage 32 seat cushion inner shell 34 outer cover 36 first elastic layer 38 second elastic layer 41 upper surface 42 lower surface 50 first mold 51 forming frame 52 hollow portion 53 outer cover layer 54 first elastic layer 55 second mold 56 cavity 57 second elastic layer 11