A molding mechanism and a mold

Abstract

This utility model discloses a molding mechanism and mold, including a main body, movable parts, and elastic parts. An extension is provided on one side of the main body, and an annular protrusion surrounds the extension. An air guide channel is provided within the extension. Several movable parts are arranged around the annular protrusion, and an elastic part is provided between each movable part and the annular protrusion. The elastic part causes the movable parts to expand and contract radially. When the movable parts contract, they abut against each other in a ring. The inner wall of each movable part has a spiral groove, which is opposite to the extension. This utility model can form threads, and during demolding, the movable parts can automatically separate from the product threads, facilitating the removal of the blank or product. Furthermore, the molding mechanism can flexibly switch positions between a first mold section and a second mold section, facilitating the transfer of the blank and improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding mechanism and a mold. Background Technology

[0002] Blow molding molds are specialized molds used to manufacture hollow plastic products, widely used in plastic packaging, daily chemical products, and chemical supplies. Their main function is to blow heated plastic preforms (such as bottle preforms or pipe preforms) into the mold, causing them to expand and conform to the inner wall of the mold, ultimately cooling and solidifying into the desired hollow product shape. Existing blow molding methods for threaded bottles typically involve placing the preform into the mold, blow molding, and then opening the mold to remove the product. For example, patent CN105109020B discloses a blow molding mold for oil drums, featuring a threaded core to form the threads. However, due to the threads on the product, demolding requires opening the upper and lower molds in directions that do not interfere with the threads, manually removing the product, and transporting the preform to the blow molding mold after molding, resulting in low processing efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problem that it is difficult to demold after forming threads in existing molds, resulting in low processing efficiency.

[0004] To achieve the objectives of this utility model, the following technical solution is adopted:

[0005] A forming mechanism includes a main body, movable parts, and elastic parts. The main body has an extension on one side and an annular protrusion surrounding the extension. An air guide channel is provided in the extension. Several movable parts are arranged around the annular protrusion. An elastic part is provided between each movable part and the annular protrusion. The elastic part causes the movable parts to expand and contract radially. When the movable parts contract, they abut against each other in an annular shape. The inner wall of the movable parts is provided with a spiral groove, which is arranged opposite to the extension.

[0006] In some embodiments, the outer side of the annular protrusion is provided with a first groove, the movable member is provided with a second groove, and the elastic member is disposed in the first groove and the second groove and is arranged radially along the annular protrusion.

[0007] In some embodiments, the movable part has a flanged portion, and the main body is provided with a positioning block, with the flanged portion located in a groove between the positioning block and the main body.

[0008] In some embodiments, the movable member has a tapered portion located below the positioning block.

[0009] In some embodiments, the movable element is characterized by having four movable elements, which are equally spaced apart.

[0010] A mold includes a first mold part and a second mold part arranged opposite to each other. The first mold part has a first molding cavity, and the second mold part has a second molding cavity. A molding device is provided between the first and second mold parts. The molding device includes at least two molding modules. Each molding module includes a molding mechanism, and the molding mechanism is arranged corresponding to the first and second molding cavities.

[0011] In some embodiments, the first and second molding cavities are each multiple, and each molding module has several molding mechanisms arranged at intervals, with each molding mechanism corresponding to one of the first and second molding cavities.

[0012] In some embodiments, the forming mechanism is arranged in a vertical direction.

[0013] In some embodiments, the molding device is connected to a drive assembly, which drives the molding device to rotate so that the plurality of molding modules can correspond to the first mold or the second mold respectively.

[0014] In some embodiments, the driving assembly includes a linear module and a rotary module, the forming device is disposed on the rotary module, the rotary module is disposed on the linear module, and the linear module is disposed between the first and second modules.

[0015] The molding mechanism and mold provided by this utility model have the following advantages:

[0016] This invention utilizes the telescopic movement of several movable parts to form threads, and during demolding, the movable parts can automatically separate from the product threads, facilitating the removal of the blank or product. Furthermore, the forming mechanism can flexibly switch positions between the first mold section and the second mold section, facilitating the transfer of the blank and improving processing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of a molding mechanism provided in Embodiment 1 of this utility model.

[0019] Figure 2 This is a cross-sectional view of a molding mechanism provided in Embodiment 1 of this utility model.

[0020] Figure 3 This is an exploded view of a molding mechanism provided in Embodiment 1 of this utility model.

[0021] Figure 4This is a schematic diagram of the movable component provided in Embodiment 1 of this utility model.

[0022] Figure 5 This is a schematic diagram of several movable parts retracting according to Embodiment 1 of this utility model.

[0023] Figure 6 This is a schematic diagram of the mold provided in Embodiment 2 of this utility model.

[0024] In the attached image:

[0025] 1. Main body; 2. Moving part; 3. Elastic part; 11. Extension; 12. Annular protrusion; 13. Air guide channel; 21. Spiral groove; 121. First groove; 22. Second groove; 23. Flanged part; 14. Positioning block; 15. Slide groove; 24. Conical part; 100. Mold; 10. First mold part; 20. Second mold part; 110. First molding cavity; 210. Second molding cavity; 30. Molding device; 300. Molding mechanism; 310. Molding module; 60. Blank; 40. Linear module; 50. Rotary module; 51. Base; 41. Lead screw; 42. Motor; 52. Rotary motor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] In this embodiment, "several" and "more than" refer to two or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] <Example 1>

[0030] like Figures 1 to 5 As shown, this embodiment provides a molding mechanism 300 for use in a blow molding mold, capable of molding a preform and a product. The molding mechanism of this embodiment includes a main body 1, movable parts 2, and elastic parts 3. The main body 1 has an extension 11 on one side and an annular protrusion 12 surrounding the extension 11. An air channel 13 is provided within the extension 11. The extension 11 is conical and, in conjunction with the molding cavity, forms a hollow cavity in the preform. The air channel 13 can guide airflow for blow molding. Several movable parts 2 are arranged around the annular protrusion 12. In this embodiment, there are four movable parts, evenly spaced. Each movable part 2 has an elastic part 3 between it and the annular protrusion 12. The elastic part 3 causes the movable part 2 to extend and retract radially. The elastic part 3 can be an existing elastic device such as a spring. When the movable parts 2 contract, they abut against each other in a ring. When the movable parts 2 expand outwards, a gap is formed between the movable parts 2, increasing the distance between the movable parts 2 and the extension 11, thereby enabling the molding of the preform 60 and the product. The inner wall of the movable part 2 is provided with a spiral groove 21, which is arranged opposite to the extension 11, thereby enabling threads to be formed on the blank. In the above technical solution, by the contraction and expansion of multiple movable parts 2 in the radial direction, threads can be formed on the blank. At the same time, the blank can be released after demolding, making it easy to remove defective blanks.

[0031] Furthermore, the outer surface of the annular protrusion 12 is provided with a first groove 121, the movable member 2 is provided with a second groove 22, and the elastic member 3 is disposed in the first groove 121 and the second groove 22 and is arranged radially along the annular protrusion 12. When the movable member 2 approaches the extension 11, the elastic member 3 is compressed. Through the expansion and contraction of the elastic member 3, the four movable members 2 contract or expand synchronously. The movable member 2 has a flange 23, which is arc-shaped. The main body 1 is provided with a positioning block 14, and the flange 23 is located in the sliding groove 15 between the positioning block 14 and the main body 1, so that the movable member 2 can move and will not fall off. The positioning block 14 is locked to the main body 1 by screws. The movable member 2 has a tapered part 24, which is located below the positioning block 14, so as to facilitate the insertion of the movable member 2 into the molding cavity for guidance, and so that the movable member 2 contracts after being compressed.

[0032] <Example 2>

[0033] In this embodiment, the parts that are the same as in Embodiment 1 are given the same reference numerals, and the same text descriptions are omitted.

[0034] like Figure 6 As shown, compared to Embodiment 1, this embodiment provides a mold 100 for blow molding. The mold 100 of this embodiment includes a first mold portion 10 and a second mold portion 20 disposed opposite to each other. The first mold portion 10 has a first molding cavity 110 for molding a preform 60. The second mold portion 20 has a second molding cavity 210 for blow molding a product. A molding device 30 is disposed between the first and second mold portions. The molding device 30 includes at least two molding modules 310, each including the molding mechanism 300 of Embodiment 1. The molding mechanism 300 is correspondingly disposed with the first and second molding cavities. In the above technical solution, the molding device 30 is first combined with the first mold portion 10, so that the extension 11 of the molding mechanism 300 is inserted into the first molding cavity 110. The first molding cavity 110 abuts against the movable part 2, causing it to shrink and seal the first molding cavity 110. Material is injected into the first molding cavity 110 through the first mold section 10, thereby forming a blank 60 in the first molding cavity 110. Threads are formed on the outer surface of the blank 60. Then, the mold is opened, separating the molding mechanism 300 from the first mold section 10. The movable part 2 expands outward under the restoring force of the elastic part 3, causing the threads formed on the blank to separate from the movable part 2. By inspecting the blanks, unqualified blanks are removed. Then, the blank 60 is placed into the second molding cavity 210, and airflow is injected through the air guide channel 13 for blow molding to form the product.

[0035] Furthermore, both the first and second molding cavities have multiple components, and each molding module 310 has several molding mechanisms 300 spaced apart, with each molding mechanism 300 corresponding one-to-one with the first and second molding cavities. Through this technical solution, multiple blanks and products can be molded at a time, further improving processing efficiency. The molding mechanisms 300 are arranged vertically and horizontally, making it less likely for the molded blanks and products to fall off.

[0036] Furthermore, the molding device 30 is connected to the driving assembly, which drives the molding device 30 to rotate, so that the plurality of molding modules 310 can correspond to the first mold 10 or the second mold 20 respectively. Through the driving assembly, the molding mechanism 300 can be moved, so that it is positioned opposite to the first mold 10 or the second mold 20, and the blank is transferred from the first mold 10 to the second mold.

[0037] Specifically, the driving assembly includes a linear module 40 and a rotary module 50. The forming device 30 is mounted on the rotary module 50, which in turn is mounted on the linear module 40. The linear module 40 is positioned between the first and second mold sections. The linear module 40 drives the rotary module 50 and the forming device 30 to move linearly between the first and second mold sections. The linear module 40 can be an existing linear module such as a lead screw module or a belt module. In this embodiment, the linear module 40 includes a lead screw 41, which is threadedly connected to the base 51 of the rotary module 50. One end of the lead screw 41 is connected to a motor 42, and the other end is connected to the first mold section 10. The left and right movement of the base 51 is achieved by the forward and reverse rotation of the motor 42. The rotary module 50 includes a rotary motor 52 mounted on the base 51, which drives the forming module 310 to rotate. This embodiment has two sets of molding modules 310. By rotating the rotary motor 52 by 180°, the corresponding positions of the two sets of molding modules 310 and the first and second modules can be switched.

[0038] In the above embodiments one and two, during the working process, depending on the different working environments, some of the technical implementation methods of embodiments one and two can be combined or replaced.

[0039] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A forming mechanism characterized by, It includes a main body, movable parts, and elastic parts. The main body has an extension on one side and an annular protrusion surrounding the extension. An air guide channel is provided in the extension. Several movable parts are arranged around the annular protrusion. An elastic part is provided between each movable part and the annular protrusion. The elastic part causes the movable parts to expand and contract radially. When the movable parts contract, they abut against each other in an annular shape. The inner wall of the movable parts is provided with a spiral groove, which is arranged opposite to the extension.

2. The molding mechanism according to claim 1, characterized in that, The outer side of the annular protrusion is provided with a first groove, the movable member is provided with a second groove, and the elastic member is disposed in the first groove and the second groove and is arranged radially along the annular protrusion.

3. The molding mechanism according to claim 2, characterized in that, The movable part has a flanged portion, and a positioning block is provided on the main body. The flanged portion is located in a groove between the positioning block and the main body.

4. The molding mechanism according to claim 3, characterized in that, The movable part has a tapered portion, which is located below the positioning block.

5. The molding mechanism according to claim 4, characterized in that, There are four movable parts, which are evenly spaced apart.

6. A mold, characterized in that, The device includes a first mold portion and a second mold portion arranged opposite to each other. The first mold portion has a first molding cavity, and the second mold portion has a second molding cavity. A molding device is provided between the first and second mold portions. The molding device includes at least two molding modules. Each molding module includes a molding mechanism as described in any one of claims 1 to 5. The molding mechanism is arranged correspondingly to the first and second molding cavities.

7. The mold according to claim 6, characterized in that, There are multiple first and second molding cavities, and each molding module has several molding mechanisms arranged at intervals, with each molding mechanism corresponding to one of the first and second molding cavities.

8. The mold according to claim 7, characterized in that, The forming mechanism is arranged in a vertical direction.

9. The mold according to claim 6, characterized in that, The molding device is connected to the driving component, which drives the molding device to rotate so that the molding modules can correspond to the first mold or the second mold respectively.

10. The mold according to claim 9, characterized in that, The driving assembly includes a linear module and a rotary module. The forming device is mounted on the rotary module, the rotary module is mounted on the linear module, and the linear module is positioned between the first and second modules.

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