• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention provides a PVC ball with a multilayer structure and a device for manufacturing the PVC ball. The invention relates to the technical field of PVC balls, and solves the problem that it is impossible to manufacture a multilayer PVC ball with the prior art rotational molding methods. A first layer of PVC ball skin from the PVC ball served as an outer ball skin, and a second layer of PVC ball skin served as an inner ball skin. The inner wall of the first layer of PVC ball skin and the outer wall of the second layer of PVC ball skin are fused together. A nozzle is insertably provided and connected to a mouth structure for inflating the first layer of PVC ball skin and the second layer of PVC ball skin. An upper mold and a lower mold of the device are provided with a mold closure snap member controlling opening and closing. One end of a rotating shaft is connected to the lower mold. The other end of the rotation shaft is rotatably connected to a mold holder. One end of a shaft of revolution is rotatably connected to the mold support. The axis of the shaft of rotation is provided in a manner not parallel to the axis of the shaft of revolution. The upper mold is provided with a secondary material injection structure forming a through door for secondary material injection. The PVC ball made by the invention has the functionality of a double-layered PVC ball. Figure to be published with the abstract: Fig. 1
    公开号:FR3101272A3
    申请号:FR2008887
    申请日:2020-09-02
    公开日:2021-04-02
    发明作者:Shoafeng SHI
    申请人:Chu Zhou Heng Jia Sports Products Ltd；
    IPC主号:
    专利说明:

    [0001] The invention relates to the technical field of PVC balls, and in particular to a PVC ball with a multilayer structure and a device for manufacturing the PVC ball.
    [0002] STATE OF THE ART
    [0003] Presently, PVC balls made by sludge molding or rotational molding process have a single-layer structure. Methods of manufacturing a multilayer structure ball are relatively complicated and expensive. Therefore, it appears very important to resolve this type of problem.
    [0004] An object of the invention is to design a PVC ball with a multilayer structure and a device for manufacturing the PVC ball so that the PVC ball has the functionality of a double-layer PVC ball.
    [0005] The invention is achieved by the following technical solutions:
    [0006] The invention provides a multilayer structure PVC ball comprising a first layer of PVC ball skin, a second layer of PVC ball skin, and a nozzle, the first layer of PVC ball skin serving as a skin. outer ball skin, the second layer of PVC ball skin serving as an inner ball skin, the inner wall of the first layer of PVC ball skin and the outer wall of the second layer of PVC ball skin being connected by fusion;
    [0007] The nozzle being insertively provided and connected to an inflating mouth structure of the first layer of PVC ball skin and the second layer of PVC ball skin.
    [0008] By adopting the above-described configuration and structure, the multilayer structure PVC ball can have the functionality of a double-layer ball, and can have different performance by selecting different ball skin layer properties. For example, a PVC formula material with strong strength and strong support capacity for the inner ball skin, and a soft and comfortable to touch PVC formula material for the outer ball skin are used. So, at the same time of realizing that the ball has excellent supporting force, the surface of the ball is very soft and comfortable to touch. And at the same time, one can use a foaming formula material with anti-explosion function for the inner ball skin and non-foaming material with smooth face for the outer ball skin. Thus, the drawback in the prior art is solved that a ball with a smooth face ball skin does not have an anti-explosion function, and a ball with an anti-explosion function is very susceptible to smudging of the holes. surface bubble due to being foaming. Thus, the multilayer structure PVC ball can fully unite ball skins with two properties, realizing at the same time that the original anti-explosion function of the ball is noticeably increased with the addition of the smooth-faced outer ball skin. , and that the surface of the ball has the functions of being smooth, aesthetic, and easy to clean.
    [0009] To further realize the invention, the following configuration and structure is adopted in particular: the first layer of PVC ball skin is a non-foaming PVC ball skin layer, and the second PVC ball skin layer is an explosion-proof and foaming PVC ball skin layer.
    [0010] To further realize the invention, the following configuration and structure is adopted in particular: the surface roughness of the first PVC ball skin layer is less than the surface roughness of the second PVC ball skin layer.
    [0011] When adopting the configuration and structure described above, the surface of the first layer of non-foaming PVC ball skin is smoother than the surface of the second layer of foaming PVC ball skin. A foaming formula material with anti-explosion function is used for the inner ball skin and a non-foaming smooth face material for the outer ball skin. Thus, the drawback in the prior art is solved that a ball with a smooth face ball skin does not have an anti-explosion function, and a ball with an anti-explosion function is very susceptible to smudging of the holes. surface bubble due to being foaming. The invention integrates together ball skins with two properties, realizing both that the original anti-explosion function of the ball body is significantly increased with the addition of the smooth-faced outer ball skin, and that the surface of the body of the ball has the functions of being smooth, aesthetic, and easy to clean.
    [0012] To further realize the invention, the following configuration and structure is adopted in particular: The structural strength of the first PVC ball skin layer is lower than the structural strength of the second PVC ball skin layer.
    [0013] When adopting the configuration and structure described above, using a PVC formula material with strong strength and strong supporting ability for the inner ball skin, and a soft and comfortable PVC formula material is used. to the touch for the outer ball skin. So, at the same time of realizing that the ball has excellent supporting force, the surface of the ball is very soft and comfortable to touch.
    [0014] To further realize the invention, the following configuration and structure is adopted in particular: the thickness of the first layer of PVC ball skin is greater than, or equal to, the thickness of the second ball skin layer of PVC.
    [0015] To further realize the invention, the following configuration and structure is adopted in particular: the thickness of a corner portion at the inflation mouth structure of the second layer of PVC ball skin is greater than the thickness of the rest of the second layer of PVC ball skin.
    [0016] By adopting the configuration and structure described above, the structural rigidity of the corner portion at the inflation mouth structure can be increased.
    [0017] The invention further discloses a device for manufacturing a PVC ball with a multilayer structure. The multilayer structure PVC ball making device is for making the above described multilayer structure PVC ball. The multilayer structure PVC ball manufacturing device includes a mold rotating turntable, a rotational molding furnace, a mold, a rotating shaft, a mold holder, and a revolving shaft. The mold includes an upper mold and a lower mold provided with a mold closure snap member controlling opening and closing. The rotational molding oven is able to accommodate the mold. The mold rotating turntable is rotatably connected inside the rotational molding furnace. The mold rotating turntable is for mounting the mold. The rotation shaft is a hollow shaft, one end of which is connected to the rotational molding furnace and in communication with the interior of the rotational molding furnace. The mold holder is a hollow holder and is connected to the rotation shaft. The other end of the rotation shaft is rotatably connected to the mold holder. One end of the revolving shaft is rotatably connected to the mold support. The axis of the shaft of rotation is provided in a manner not parallel to the axis of the shaft of revolution. The upper mold is provided with a secondary material injection structure forming a secondary material injection through door.
    [0018] To further realize the invention, the following configuration and structure is adopted in particular: the secondary material injection gate is provided in a corresponding manner at the level of the inflation mouth structure of the multilayer PVC ball. .
    [0019] To further realize the invention, the following configuration and structure is adopted in particular: the axis of the shaft of rotation is perpendicular to the axis of the shaft of revolution.
    [0020] To further realize the invention, the following configuration and structure is adopted in particular: the rotation shaft is rotatably connected with the mold support by means of a slewing ring, and the revolution shaft is connected rotating with the mold support by means of a slewing ring.
    [0021] The invention has the following advantages and beneficial effects:
    [0022] In the invention, the multilayer structure PVC ball can have a functionality of a double-layer ball, and can have different performance by selecting different properties of the ball skin layer. For example, a PVC formula material with strong strong strength and strong supporting ability for the inner ball skin, and a soft and comfortable to touch PVC formula material for the outer ball skin are used. So, at the same time of realizing that the ball has excellent supporting force, the surface of the ball is very soft and comfortable to touch. And at the same time, one can use a foaming formula material with anti-explosion function for the inner ball skin and non-foaming material with smooth face for the outer ball skin. Thus, the drawback in the prior art is solved that a ball with a smooth face ball skin does not have an anti-explosion function, and a ball with an anti-explosion function is very susceptible to smudging of the holes. surface bubble due to being foaming. Thus, the multilayer structure PVC ball can fully unite ball skins with two properties, realizing at the same time that the original anti-explosion function of the ball is noticeably increased with the addition of the smooth-faced outer ball skin. , and that the surface of the ball has the functions of being smooth, aesthetic, and easy to clean.
    [0023] BRIEF DESCRIPTION OF THE FIGURES
    [0024] In order to more clearly explain the embodiments of the invention or the technical solutions in the state of the art, the following will briefly introduce the drawings required in the embodiments or the description of the state of the art. Obviously, the drawings in the following description are only a few embodiments of the invention. For those skilled in the art, other designs can also be obtained on the basis of these designs without making any creative efforts.
    [0025] Fig. 1 is a schematic view of the structure of a PVC ball with a multilayer structure;
    [0026] Fig. 2 is a schematic view of the structure of a device for manufacturing a PVC ball with a multilayer structure (mold not being mounted);
    [0027] Fig. 3 is a schematic structural view of a device for manufacturing a PVC ball with a multilayer structure (mold being mounted);
    [0028] Fig. 4 is a schematic view of the structure of a mold;
    [0029] The references in the figures are:
    [0030] 1. First layer of PVC ball skin; 2. Second layer of PVC ball skin; 3. Nozzle; 4. Top mold; 5. Bottom mold; 6. Rotation shaft; 7. Mold holder; 8. Tree of revolution; 9. Secondary material injection gate; 10. Mold rotating turntable; 11. Rotational molding furnace.
    [0031] DETAILED EXPOSURE OF THE EMBODIMENTS
    [0032] In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions of the invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the invention, but not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the invention.
    [0033] Example 1:
    [0034] A PVC ball with a multilayer structure, the PVC ball having the functionality of a double-layer ball and, as illustrated in Fig. 1, being planned to have the following structure:
    [0035] Essentially, the multilayer structure PVC ball comprises a first layer of PVC ball skin 1, a second layer of PVC ball skin 2, and a nozzle 3. The first layer of PVC ball skin 1 serves as a. an outer ball skin. The second layer of PVC ball skin 2 served as an inner ball skin. The first layer of PVC ball skin 1 envelops the second layer of PVC ball skin 2. The inner wall of the first layer of PVC ball skin 1 and the outer wall of the second layer of PVC ball skin 2 are connected by fusion. An inflation mouth structure for mounting a nozzle 3 is formed in a through manner at a corresponding place of the first PVC ball skin layer 1 and the second PVC ball skin layer 2. A nozzle 3 is provided. by insertion at the level of the inflation mouth structure. The nozzle 3 is fixed and connected with the inflating mouth structure of the first PVC ball skin layer 1 and the second PVC ball skin layer 2 by a frictional force created by extrusion.
    [0036] In the present example embodiment, the thickness of the first layer of PVC ball skin 1 is greater than or equal to the thickness of the second layer of PVC ball skin 2. Preferably, thickness of a corner portion at the inflation mouth structure of the second PVC ball skin layer 2 is greater than the thickness of the rest of the second PVC ball skin layer 2, to increasing the structural rigidity of the corner portion at the inflation mouth structure.
    [0037] More specifically, to achieve certain properties, the first layer of PVC ball skin 1 is a layer of non-foaming PVC ball skin, and the second layer of PVC ball skin 2 is a layer of ball skin. explosion-proof and foaming PVC. At the same time, the surface roughness of the first PVC ball skin layer 1 is lower than the surface roughness of the second PVC ball skin layer 2, and the structural strength of the first ball skin layer of PVC 1 is less than the structural strength of the second layer of PVC ball skin 2.
    [0038] The surface of the first non-foaming PVC ball skin layer 1 is smoother than the surface of the second foaming PVC ball skin layer 2. A foaming formula material with anti-explosion function is used for the inner ball skin and a non-foaming smooth face material for the outer ball skin. Thus, the drawback in the prior art is solved that a ball with a smooth face ball skin does not have an anti-explosion function, and a ball with an anti-explosion function is very susceptible to smudging of the holes. surface bubble due to being foaming. A PVC formula material with strong strength and strong supportability for the inner ball skin, and a soft and comfortable to touch PVC formula material for the outer ball skin are used. So, at the same time of realizing that the ball has excellent supporting force, the surface of the ball is very soft and comfortable to touch. The invention integrates together ball skins with two properties, realizing both that the original anti-explosion function of the ball is significantly increased with the addition of the smooth-faced outer ball skin, and the surface of the ball. ball has the functions of being smooth, aesthetic, and easy to clean.
    [0039] Example 2:
    [0040] The present example embodiment provides methods of manufacturing the multilayer structure PVC ball in Embodiment 1, and in particular, comprises three methods.
    [0041] The first process comprises the following steps:
    [0042] Step 1: Prepare a molten material for the outer ball skin that is soft and comfortable to the touch, the formula of which is: 45% PVC resin, 50% plasticizer, 3% additive, the remainder being colorant;
    [0043] Step 2: Prepare a molten material for the inner ball skin which has strong strength and strong supporting ability, the formula of which is: 45% PVC resin, 50% plasticizer, 3% additive, the remainder being a colorant;
    [0044] Step 3: Inject the molten material for the outer ball skin prepared into a slush molding or rotational molding mold, close the mold and lock screws, push the mold into a slush molding or molding heating furnace by rotating, and carry out heating and plasticizing in the oven for 4 minutes, then remove the mold from the oven, inject the molten material for the inner ball skin by means of a molten material delivery gun to a place of secondary injection of material from the mold, then close the secondary material injection place tightly, push the mold into the heating furnace again, and heat for 7 minutes so that the molten material in the mold is plasticized and conformed;
    [0045] Step 4: Remove the mold from the heating oven, immerse it in water to cool it, then unlock the screws and open the mold, remove the ball, and inflate it to take its finished shape.
    [0046] The ball is provided with a double-layered structure.
    [0047] The second method comprises the following steps:
    [0048] A method of manufacturing a PVC ball with a multilayer structure comprising the following steps:
    [0049] Step 1: Prepare a molten material for the soft and comfortable to the touch outer ball skin, the formula of which is: 40% PVC resin, 40% plasticizer, 2% additive, the remainder being colorant;
    [0050] Step 2: Prepare a molten material for the inner ball skin which has strong strength and strong supporting ability, the formula of which is: 45% PVC resin, 40% plasticizer, 2% additive, the remainder being a colorant;
    [0051] Step 3: Inject the molten material for the outer ball skin prepared into a slush molding or rotational molding mold, close the mold and lock screws, push the mold into a slush molding or molding heating furnace by rotating, and perform heating and plasticizing in the oven for 2 minutes, then remove the mold from the oven, inject the molten material for the inner ball skin by means of a molten material delivery gun to a place of secondary injection of material from the mold, then close the secondary material injection place tightly, push the mold into the heating furnace again, and perform heating for 5 minutes so that the molten material in the mold is plasticized and conformed;
    [0052] Step 4: Remove the mold from the heating oven, immerse it in water to cool it, then unlock the screws and open the mold, remove the ball, and inflate it to take its finished shape.
    [0053] The ball is provided with a double-layered structure.
    [0054] The third method comprises the following steps:
    [0055] A method of manufacturing a PVC ball with a multilayer structure comprising the following steps:
    [0056] Step 1: Prepare a molten material for the soft and comfortable to the touch outer ball skin, the formula of which is: 50% PVC resin, 65% plasticizer, 5% additive, the remainder being colorant;
    [0057] Step 2: Prepare a molten material for the inner ball skin which has strong strength and strong supporting ability, the formula of which is: 60% PVC resin, 50% plasticizer, 4% additive, the remainder being a colorant;
    [0058] Step 3: Inject the molten material for the outer ball skin prepared into a slush molding or rotational molding mold, close the mold and lock screws, push the mold into a slush molding or molding heating furnace by rotating, and carry out heating and plasticizing in the oven for 8 minutes, then remove the mold from the oven, inject the molten material for the inner ball skin by means of a molten material delivery gun to a place of secondary injection of material from the mold, then close the secondary material injection place tightly, push the mold into the heating furnace again, and perform heating for 10 minutes so that the molten material in the mold is plasticized and conformed;
    [0059] Step 4: Remove the mold from the heating oven, immerse it in water to cool it, then unlock the screws and open the mold, remove the ball, and inflate it to take its finished shape.
    [0060] Using PVC formula material with strong strength and strong supporting ability for inner ball skin, and soft and comfortable to touch PVC formula material for outer ball skin, opening the door of the ball skin. 'secondary injection of material designed on the mold in the middle of heating and primary shaping by injecting the molten material for the outer ball skin into the mold and injecting the liquid molten material for the inner ball skin into the mold for a secondary conformation so that the outer ball skin and the inner ball skin integrally come together to realize a functionality of a double-layered PVC ball, it is realized that at the same time realizing that the ball has a supporting force excellent, the surface of the ball is very soft and comfortable to the touch.
    [0061] Using a foaming formula material with anti-explosion function for the inner ball skin and smooth-faced non-foaming material for the outer ball skin, opened the secondary material injection door designed on the mold at the heating medium and primary shaping by injecting the molten material for the outer ball skin into the mold and injecting the liquid molten material for the inner ball skin into the mold for secondary shaping so that the outer ball skin and the inner ball skin come together integrally. Thus, the drawback in the prior art is solved that a ball with a smooth face ball skin does not have an anti-explosion function, and a ball with an anti-explosion function is very susceptible to smudging of the holes. surface bubble due to being foaming. The invention integrally unites ball skins with two properties, realizing both that the original anti-explosion function of the ball is significantly increased with the addition of the smooth-faced outer ball skin, and the surface of the ball. ball has the functions of being smooth, aesthetic, and easy to clean.
    [0062] Example 3:
    [0063] The present exemplary embodiment provides a device for manufacturing a PVC ball with a multilayer structure for manufacturing the PVC ball with a multilayer structure in the example of embodiment 1 according to the method for manufacturing a PVC ball with a multilayer structure in the example. of embodiment 2 which, as illustrated in FIG. 3 and Fig. 4, especially adopts the following configuration and structure:
    [0064] The multilayer structure PVC ball making device is more precisely a rotational molding device comprising a mold rotating turntable 10, a rotational molding furnace 11, a mold, a rotating shaft 6, a mold support. mold 7, and a revolution shaft 8, in which the mold comprises an upper mold 4 and a lower mold 5. The mold rotation turntable 10 enables the mold to be mounted. The rotational molding furnace 11 is for accommodating the mold and heating the mold like a heating furnace. The rotational molding furnace 11 is provided with an opening at the top at which a furnace cover is fitted. The mold rotating turntable 10 is provided inside the rotational molding furnace 11. The mold rotating turntable 10 is mounted to the inner wall of the rotational molding furnace 11 by a slewing ring. The upper mold 4 and the lower mold 5 are semicircular molds, and are provided with a mold closure snap-in element which allows them to be snapped and opened. The mold closure ratchet member may be a locking screw to control the opening and closing state of the upper mold 4 and the lower mold 5 by changing the state of the closing ratchet member. of mold. The upper mold 4 is provided centrally at the top of a secondary material injection structure forming a secondary material injection gate 9 which is correspondingly provided at the inflation mouth structure of the ball. of PVC with a multilayer structure. The axis of the rotation shaft 6 is provided in a manner not parallel to the axis of the shaft of revolution 8. In the present example embodiment, the axis of the rotation shaft 6 is perpendicular. to the axis of the shaft of revolution 8. The mold support 7 is substantially an L-shaped hollow support comprising a horizontal rod and a vertical rod. The rotation shaft 6 is a shaft provided vertically. A lower end of the rotation shaft 6 is rotatably connected by means of a slewing ring to one end of the horizontal rod of the mold support 7. At the same time, the lower end of the rotation shaft 6 is in communication with the end of the horizontal rod of the mold holder 7. An upper end of the rotation shaft 6 passes through the center of the bottom wall of the rotational molding furnace 11 and extends into the molding furnace by rotation 11. The rotation shaft 6 is fixedly connected to the rotational molding furnace 11. The revolution shaft 8 is provided horizontally. A left end of the revolution shaft 8 is rotatably connected by means of a slewing ring to the vertical rod of the mold support 7. The axis of rotation of the mold rotating turntable 10 is provided horizontally. and is perpendicular to the axis of the shaft of revolution 8. The mold support 7 served as a thermal energy conduit. High temperature gas can enter the rotational molding furnace 11 through the hollow part of the mold holder è and the hollow part of the rotational shaft 6 to serve as an energy source for heating a molten material in it. the mussel.
    [0065] The above is only the specific implementation of the invention, but the scope of protection of the invention is not limited to this. One skilled in the art can easily think of changes or replacements in the technical framework disclosed by the invention, which should be covered by the scope of protection of the invention.
    权利要求:
    Claims (10)
    [0001]
    PVC ball with multilayer structure, characterized in that it comprises a first layer of PVC ball skin (1), a second layer of PVC ball skin (2), and a nozzle (3), the first layer of PVC ball skin (1) serving as an outer ball skin, the second layer of PVC ball skin (2) serving as an inner ball skin, the inner wall of the first layer of ball skin of PVC (1) and the outer wall of the second layer of PVC ball skin (2) being fused together; the nozzle (3) being insertably provided and connected to an inflating mouth structure of the first PVC ball skin layer (1) and the second PVC ball skin layer (2).
    [0002]
    Multilayer structure PVC ball according to claim 1, characterized in that the first PVC ball skin layer (1) is a non-foaming PVC ball skin layer, and the second PVC ball skin layer (2) is anti-explosion and foaming PVC ball skin layer.
    [0003]
    Multilayer structure PVC ball according to claim 1, characterized in that the surface roughness of the first PVC ball skin layer (1) is less than the surface roughness of the second PVC ball skin layer ( 2).
    [0004]
    Multilayer structure PVC ball according to claim 3, characterized in that the structural strength of the first PVC ball skin layer (1) is lower than the structural strength of the second PVC ball skin layer (2) .
    [0005]
    Multilayer structure PVC ball according to claim 1, characterized in that the thickness of the first PVC ball skin layer (1) is greater than or equal to the thickness of the second ball skin layer of PVC (2).
    [0006]
    Multilayer structure PVC ball according to claim 1 or 5, characterized in that the thickness of a corner portion at the inflation mouth structure of the second PVC ball skin layer (2) is greater than the thickness of the rest of the second layer of PVC ball skin (1).
    [0007]
    A multilayer structure PVC ball manufacturing device, characterized in that the multilayer structure PVC ball manufacturing device is for manufacturing the multilayer structure PVC ball according to any of claims 1 to 6, the device for manufacturing Multilayer structure PVC ball includes a mold rotating turntable (10), a rotational molding furnace (11), a mold, a rotating shaft (6), a mold holder (7), and a shaft of revolution (8), the mold comprises an upper mold (4) and a lower mold (5) provided with a mold closing snap-fit element controlling opening and closing; the rotational molding furnace (11) is able to accommodate the mold, the mold rotating turntable (10) is rotatably connected inside the rotational molding furnace (11), the rotating turntable of mold (10) is for mounting the mold, the rotation shaft (6) is a hollow shaft, one end of which is connected to the rotational molding furnace (11) and in communication with the interior of the rotational molding furnace (11); the mold holder (7) is a hollow holder and is connected to the rotation shaft (6), the other end of the rotation shaft (6) is rotatably connected to the mold holder (7), a end of the revolution shaft (8) is rotatably connected to the mold support (7), the axis of the rotation shaft (6) is provided in a manner not parallel to the axis of the shaft of revolution (8), the upper mold (4) is provided with a secondary material injection structure forming a through door for secondary material injection (9).
    [0008]
    Multilayer structure PVC ball manufacturing device according to claim 7, characterized in that the secondary material injection gate (9) is correspondingly provided at the inflation mouth structure of the pressure ball. Multilayer structure PVC.
    [0009]
    Multilayer structure PVC ball manufacturing device according to claim 7, characterized in that the axis of the rotating shaft (6) is perpendicular to the axis of the rotating shaft (8).
    [0010]
    Multilayer structure PVC ball manufacturing device according to claim 7, characterized in that the rotating shaft (6) is rotatably connected with the mold support (7) by means of a slewing ring, and the shaft of revolution (8) is connected in rotation with the mold support (7) by means of a slewing ring.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3101272B3|2021-10-29|
    CN110640953A|2020-01-03|
    DE202020104631U1|2020-09-01|
    US20210093930A1|2021-04-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN111469321A|2020-05-19|2020-07-31|武爱强|Manufacturing method and manufacturing mold of inflatable lantern body|
    CN112274947A|2020-09-02|2021-01-29|滁州恒佳体育用品有限公司|Method for manufacturing toy ball with color pieces inside|
    法律状态:
    2021-09-17| PLFP| Fee payment|Year of fee payment: 2 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910943684.1A|CN110640953A|2019-09-30|2019-09-30|Manufacturing method of PVC ball with multilayer structure|
    CN201910943684.1|2019-09-30|
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