A forming die for a pen container body

Abstract

The utility model relates to a kind of forming mould of pen container cylinder, including respectively front and rear setting and mutually cooperating dynamic pressure assembly and shaping assembly, dynamic pressure assembly includes forming block, the fixed flow divider of activity being set in the front side of forming block to have front and rear translation function, and the feed block of being fixed in the front side of flow divider, shaping assembly includes fixed module, the seat block of being fixed in the rear side of fixed module, and the ejection mechanism of being arranged between seat block and fixed module;Limiting recess cavity is opened on the front side outer wall of forming block, forming recess cavity is opened in the lower side inner wall of limiting recess cavity, cavity hole is opened between the bottom surface of forming recess cavity and the rear side outer wall of forming block;The utility model uses two-stage mould clamping mode, so that it can make parting surface be set on the radial plane of cylinder, and further effectively reduce demolding difficulty, and multiple demolding mechanisms are not needed to be additionally installed, and further reduce manufacturing cost, and simplify manufacturing process.

Description

Technical Field

[0001] This utility model relates to a molding die for a pen holder body. Background Technology

[0002] A pen holder is a cylindrical container used to hold pens. Most pen holders on the market are made of plastic, and many are assembled from multiple parts. The pen holder body is the main part of an assembled pen holder. The plastic pen holder body is produced by using a matching injection mold and an injection molding machine.

[0003] Because some pen holder bodies require recessed cavities on their sides to accommodate other accessories, and the existing pen holder body injection molds use a single-stage mold closing method, meaning the mold closing only occurs once, and it is between the moving mold core and the fixed mold core, the parting surface must be set on the axial plane of the body to form the aforementioned cavities. However, this makes demolding difficult, requiring multiple demolding mechanisms to be installed between the moving mold core and the fixed mold core for successful demolding. This increases manufacturing costs and makes the manufacturing process more cumbersome, requiring further improvement. Utility Model Content

[0004] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide a molding die for a pen holder body that adopts a two-stage molding method to effectively reduce the difficulty of demolding, thereby reducing the manufacturing cost and simplifying the manufacturing process.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a forming mold for a pen holder body, comprising a dynamic pressure component and a shaping component arranged at the front and rear and cooperating with each other, characterized in that the dynamic pressure component includes a forming block, a fixed flow divider block movably arranged on the front side of the forming block to have a front and rear translation function, and a feeding block fixed on the front side of the flow divider block; the shaping component includes a fixed module, a seat block fixed on the rear side of the fixed module, and an ejection mechanism arranged between the seat block and the fixed module. A limiting cavity is formed on the front outer wall of the molding block, a molding cavity is formed on the lower inner wall of the limiting cavity, and a cavity hole is formed between the bottom surface of the molding cavity and the rear outer wall of the molding block. The dynamic pressure assembly further includes an end block fixed on the rear outer wall of the diverter block. Correspondingly, the shaping assembly further includes a core block fixed on the front outer wall of the shaping module. A first protrusion is formed on the end face of the end block in the direction of the core block. Correspondingly, a second protrusion is formed on the end face of the core block in the direction of the end block, which cooperates with the cavity hole. The end face of the second protrusion cooperates with the end face of the first protrusion. The dynamic pressure assembly also includes a side forming mechanism disposed on the forming block. The side forming mechanism includes a forming cylinder fixed on the upper outer wall of the forming block and a side forming block movably connected in the limiting cavity to have the function of vertical movement up and down. The telescopic end of the forming cylinder is vertically downward and fixed on the side forming block.

[0006] Preferably, a first molding notch is provided on the upper edge of the end of the first protrusion, and correspondingly, a second molding notch is provided on the upper edge of the end of the second protrusion to cooperate with the first molding notch, and an insert is formed downward on the lower outer wall of the side molding block.

[0007] Preferably, the first molding notch forms a first inner molding block at the end of the first protrusion, and correspondingly, the second molding notch forms a second inner molding block at the end of the second protrusion, and a vertically oriented partition groove is also provided on the end face of the second inner molding block.

[0008] Preferably, a semi-circular recessed cavity is provided on the outer walls of the front and rear sides of the end of the insert, and the bottom surfaces of the two semi-circular recessed cavities respectively cooperate with the bottom surfaces of the first forming notch and the second forming notch.

[0009] Preferably, the end face of the insert is further provided with a forming groove that communicates with the bottom surfaces of the two semi-circular recesses, and each side edge of the bottom surface of the forming groove is provided with a symmetrically distributed arc-shaped groove.

[0010] Preferably, the bottom right edge of the first forming notch is provided with a first arc-shaped notch, and correspondingly, the bottom right edge of the second forming notch is provided with a second arc-shaped notch that cooperates with the first arc-shaped notch.

[0011] Preferably, a first core post is concentrically arranged on the bottom surface of the first arc-shaped notch facing the core block, and correspondingly, a second core post is concentrically arranged on the bottom surface of the second arc-shaped notch facing the end block and cooperating with the first core post.

[0012] Preferably, the dynamic pressure assembly further includes a safety block fixed on the rear outer wall of the diverter block and located above the end block. A first inclined surface is formed on the top outer wall of the side forming block, and correspondingly, a second inclined surface that cooperates with the first inclined surface is formed on the bottom outer wall of the safety block.

[0013] Preferably, a positioning cavity that cooperates with the core block is formed on the rear outer wall of the molding block, and the cavity is formed between the bottom surface of the molding cavity and the bottom surface of the positioning cavity.

[0014] Compared with the prior art, the advantages of this utility model are as follows: This utility model adopts a two-stage mold closing method, that is, the molding block and the fixed module are first molded together, and then the flow block and the molding block are molded together for the second time. At the same time, the side molding mechanism is used to form the cavity located on the side of the pen tube body. This allows the parting surface to be set on the radial plane of the tube body, thereby effectively reducing the demolding difficulty. Moreover, there is no need to install multiple demolding mechanisms, which reduces the manufacturing cost and simplifies the manufacturing process. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings: Figure 1 This is an exploded view of the right front side of this utility model; Figure 2 This is a structural diagram of the right front side of the molding block of this utility model; Figure 3 This is a structural diagram of the left rear side of the molding block of this utility model; Figure 4 This is a structural diagram of the left rear side of the side-forming block of this utility model; Figure 5 This is a structural diagram of the left rear side of the end block of this utility model; Figure 6 This is a structural diagram of the left rear side of the safety block of this utility model; Figure 7 This is a partially enlarged structural view of the present invention at point A. Detailed Implementation

[0016] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0018] like Figures 1-7 As shown, a molding die for a pen holder includes a dynamic pressure assembly and a shaping assembly arranged at the front and rear and cooperating with each other. The dynamic pressure assembly includes a molding block 1, a fixed flow divider block 3 movably arranged in front of the molding block 1 to have a front and rear translation function, and a feeding block 6 fixed in front of the flow divider block 3. The shaping assembly includes a fixed module 2, a seat block 7 fixed in the rear of the fixed module 2, and an ejection mechanism 8 arranged between the seat block 7 and the fixed module 2. A limiting cavity 101 is provided on the front outer wall of the molding block 1, and a molding cavity 102 is provided on the lower inner wall of the limiting cavity 101. A cavity hole 103 is provided between the bottom surface of the molding cavity 102 and the rear outer wall of the molding block 1. The dynamic pressure assembly also includes an end block 4 fixed on the rear outer wall of the diverter block 3. Correspondingly, the shaping assembly also includes a core block 5 fixed on the front outer wall of the shaping module 2. A first protrusion 41 is formed on the end face of the end block 4 in the direction of the core block 5. Correspondingly, a second protrusion 51 that cooperates with the cavity 103 is formed on the end face of the core block 5 in the direction of the end block 4. The end face of the second protrusion 51 cooperates with the end face of the first protrusion 41. The dynamic pressure assembly also includes a side forming mechanism disposed on the forming block 1. The side forming mechanism includes a forming cylinder 9 fixed on the upper outer wall of the forming block 1 and a side forming block 10 movably connected in the limiting cavity 101 to have the function of vertical movement up and down. The telescopic end of the forming cylinder 9 is vertically downward and fixed on the side forming block 10.

[0019] The upper edge of the end of the first protrusion 41 is provided with a first molding notch 42. Correspondingly, the upper edge of the end of the second protrusion 51 is provided with a second molding notch 52 that cooperates with the first molding notch 42. An insert 1001 is formed downward on the lower outer wall of the side molding block 10.

[0020] The first molding notch 42 forms a first inner molding block 43 at the end of the first protrusion 41. Correspondingly, the second molding notch 52 forms a second inner molding block 53 at the end of the second protrusion 51. A vertically oriented partition groove 54 is also provided on the end face of the second inner molding block 53.

[0021] A semi-circular recessed cavity 1002 is provided on the outer walls of the front and rear sides of the end of the insert 1001. The bottom surfaces of the two semi-circular recessed cavities 1002 are respectively matched with the bottom surfaces of the first molding notch 42 and the second molding notch 52.

[0022] The end face of the insert 1001 is also provided with a forming groove 1003 that is connected to the bottom surface of the two semi-circular recesses 1002. Each side edge of the bottom surface of the forming groove 1003 is provided with a symmetrically distributed arc groove 1004.

[0023] The bottom right edge of the first forming notch 42 is provided with a first arc-shaped notch 44, and correspondingly, the bottom right edge of the second forming notch 52 is provided with a second arc-shaped notch 55 that cooperates with the first arc-shaped notch 44.

[0024] On the bottom surface of the first arc-shaped notch 44, a first core post 45 is formed concentrically in the direction of the core block 5. Correspondingly, on the bottom surface of the second arc-shaped notch 55, a second core post 56 is formed concentrically in the direction of the end block 4 and cooperates with the first core post 45.

[0025] The dynamic pressure assembly also includes a safety block 11 fixed on the rear outer wall of the diverter block 3 and located above the end block 4. A first inclined surface 1005 is formed on the top outer wall of the side forming block 10, and correspondingly, a second inclined surface 111 that cooperates with the first inclined surface 1005 is formed on the bottom outer wall of the safety block 11.

[0026] The safety block 11 is also provided with a guide groove 112 that cooperates with the telescopic end of the forming cylinder 9 in the direction of the forming cylinder 9.

[0027] A positioning cavity 104 that cooperates with the core block 5 is provided on the rear outer wall of the molding block 1, and the cavity hole 103 is opened between the bottom surface of the molding cavity 102 and the bottom surface of the positioning cavity 104.

[0028] Working principle: The feed block 6 and molding block 1 in the dynamic pressure assembly are installed in the action mechanism of the injection molding machine. Then, the seat block 7 in the shaping assembly is installed on the machine body of the injection molding machine. The action mechanism first drives the molding block 1 to move backward, which in turn drives the side molding mechanism to move backward in sync and towards the fixed module 2 until the molding block 1 and the fixed module 2 are joined together.

[0029] During the above process, the end of the second protrusion 51 on the core block 5 gradually passes through the cavity 103 and extends into the molding cavity 102. Then, the telescopic end of the molding cylinder 9 in the driving side molding mechanism extends outward to drive the side molding block 10 to move downward, thereby causing the insert 1001 on the side molding block 10 to move down into the molding cavity 102 and be located in front of the first molding notch 42.

[0030] Then, the feeding block 6 is driven to move backward by the action mechanism, and the end block 4 and safety block 11 are driven to move backward by the diverting block 3. This causes the first protrusion 41 on the end block 4 to extend into the interior of the forming cavity 102 until the end face of the first protrusion 41 and the end face of the second protrusion 51 are in contact with each other. At this time, the rear outer wall of the diverting block 3 is in contact with the front outer wall of the forming block 1. The safety block 11 moves synchronously with the diverting block 3. When the rear outer wall of the diverting block 3 is in contact with the front outer wall of the forming block 1, the telescopic end of the forming cylinder 9 is movably located in the guide groove 112. The second inclined surface 111 on the safety block 11 is pressed against the first inclined surface 1005 on the side forming block 10, which can effectively prevent the side forming block 10 from loosening.

[0031] Subsequently, the molten material enters the molding cavity 102 through the gate in the feed block 6 and the sprue in the flow divider block 3 and wraps around the outside of the first boss 41, the second boss 51 and the insert 1001. After cooling, the pen holder body is formed (existing technology).

[0032] Then, the feeding block 6 is driven forward by the action mechanism to separate the flow divider block 3 from the forming block 1, thereby driving the safety block 11 to move synchronously away from the side forming block 10. Then, the telescopic end of the forming cylinder 9 is driven to retract inward to drive the side forming block 10 to move upward, thereby causing the insert 1001 on the side forming block 10 to move out of the forming cavity 102. Finally, the forming pen holder body is pushed forward by the ejection mechanism 8 (existing technology).

[0033] This invention employs a two-stage mold-closing method. First, the molding block 1 and the fixed module 2 are molded together for the first time. Then, the flow divider block 3 and the molding block 1 are molded together for the second time. At the same time, a side molding mechanism is used to form the cavity located on the side of the pen holder body. This allows the parting surface to be set on the radial plane of the body, thereby effectively reducing the demolding difficulty. Moreover, there is no need to install multiple demolding mechanisms, which reduces manufacturing costs and simplifies the manufacturing process.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A molding die for a pen holder body, comprising a dynamic pressure assembly and a shaping assembly respectively arranged front and rear and cooperating with each other, characterized in that, The dynamic pressure assembly includes a forming block, a fixed diverting block movably disposed on the front side of the forming block to have a forward and backward translation function, and a feeding block fixed on the front side of the diverting block. The shaping assembly includes a fixed module, a seat block fixed on the rear side of the fixed module, and an ejection mechanism disposed between the seat block and the fixed module. A limiting cavity is formed on the front outer wall of the molding block, a molding cavity is formed on the lower inner wall of the limiting cavity, and a cavity hole is formed between the bottom surface of the molding cavity and the rear outer wall of the molding block. The dynamic pressure assembly further includes an end block fixed on the rear outer wall of the diverter block. Correspondingly, the shaping assembly further includes a core block fixed on the front outer wall of the shaping module. A first protrusion is formed on the end face of the end block in the direction of the core block. Correspondingly, a second protrusion is formed on the end face of the core block in the direction of the end block, which cooperates with the cavity hole. The end face of the second protrusion cooperates with the end face of the first protrusion. The dynamic pressure assembly also includes a side forming mechanism disposed on the forming block. The side forming mechanism includes a forming cylinder fixed on the upper outer wall of the forming block and a side forming block movably connected in the limiting cavity to have the function of vertical movement up and down. The telescopic end of the forming cylinder is vertically downward and fixed on the side forming block.

2. The molding die for a pen holder body according to claim 1, characterized in that, The upper edge of the end of the first protrusion is provided with a first molding notch, and correspondingly, the upper edge of the end of the second protrusion is provided with a second molding notch that cooperates with the first molding notch. An insert is formed downward on the lower outer wall of the side molding block.

3. The molding die for a pen holder body according to claim 2, characterized in that, The first molding notch forms a first inner molding block at the end of the first protrusion. Correspondingly, the second molding notch forms a second inner molding block at the end of the second protrusion. A vertically oriented partition groove is also provided on the end face of the second inner molding block.

4. The molding die for a pen holder body according to claim 2, characterized in that, The insert has a semi-circular cavity that is symmetrically distributed on the outer walls of both the front and rear sides. The bottom surfaces of the two semi-circular cavities respectively cooperate with the bottom surfaces of the first forming notch and the second forming notch.

5. The molding die for a pen holder body according to claim 4, characterized in that, The end face of the insert is also provided with a forming groove that is connected to the bottom surface of the two semi-circular recesses. Each side edge of the bottom surface of the forming groove is provided with a symmetrically distributed arc-shaped groove.

6. The molding die for a pen holder body according to claim 2, characterized in that, The bottom right edge of the first forming notch has a first arc-shaped notch, and correspondingly, the bottom right edge of the second forming notch has a second arc-shaped notch that cooperates with the first arc-shaped notch.

7. The molding die for a pen holder body according to claim 6, characterized in that, On the bottom surface of the first arc-shaped notch facing the core block, there is a first core post concentrically arranged. Correspondingly, on the bottom surface of the second arc-shaped notch facing the end block, there is a second core post concentrically arranged and cooperating with the first core post.

8. The molding die for a pen holder body according to claim 1, characterized in that, The dynamic pressure assembly also includes a safety block fixed on the rear outer wall of the diverter block and located above the end block. A first inclined surface is formed on the top outer wall of the side forming block, and correspondingly, a second inclined surface that cooperates with the first inclined surface is formed on the bottom outer wall of the safety block.

9. The molding die for a pen holder body according to claim 1, characterized in that, The rear outer wall of the molding block is provided with a positioning cavity that cooperates with the core block, and the cavity is located between the bottom surface of the molding cavity and the bottom surface of the positioning cavity.

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