Bottle preform mold
By optimizing the preform mold structure and temperature control, the problems of flocculent material at the end of the preform and flow channel processing were solved, achieving efficient shearing and improved appearance.
Patent Information
- Application Number
- CN202422753143.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The existing preform mold forms white flocs at the end due to temperature, affecting the appearance of the bottle, and the runner design is too long and requires additional cutting.
A preform mold is designed, which includes a fixed platen, mold core, guide plate, shear plate, and push plate. Through sliding connections and slope design, automatic shearing of the runner is achieved, and heating coils and water pipes are used to optimize temperature control.
It effectively removes the flocs at the end of the preform, simplifies the flow channel processing, and improves production efficiency and product appearance quality.
Smart Images
Figure CN223354806U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic molds, in particular to a bottle embryo mold. Background Art
[0002] A preform is a semi-finished product before a plastic bottle is formed. The preform manufacturing process primarily involves injection molding, where raw materials are filled into a mold under specific temperature and pressure. The molded product then forms under the working conditions of the injection molding machine. After blow molding, the preform can be transformed into plastic bottles of various shapes and uses, such as mineral water bottles and carbonated beverage bottles. During preform production, the end of the preform is often broken off at the point where it meets the nozzle, leaving only a small protrusion of the flow channel, allowing for direct processing to the next step. However, the higher temperature above the nozzle affects the stress at the end of the preform during cooling and molding, resulting in the appearance of white flocculent material inside the end, which affects the aesthetics. Furthermore, an overly long flow channel design requires shearing in the next step, making it more cumbersome. Therefore, a preform mold has been designed to address these issues. Utility Model Content
[0003] (1) Technical problems solved
[0004] In view of the shortcomings of the existing technology, the utility model provides a bottle preform mold, which solves the problem that the existing bottle preform mold is affected by temperature and forms white flocs inside the end, affecting the appearance of the processed bottle.
[0005] (2) Technical solution
[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0007] The utility model provides a bottle preform mold, comprising: a fixed template that is concave in shape as a whole, a mold core is inserted and connected to the interior of the opening at the lower end of the fixed template, a guide plate is provided on the lower surface of the fixed template and is located at the front and rear sides of the mold core, a shear plate is slidably connected to the left and right sides of the mold core and between the two guide plates, a sliding rod is connected to the left and right sides of the lower surface of the mold core, and the sliding rod is inserted and connected between the shear plate, a movable template is provided at the lower end of the fixed template, a bottle preform pulling plate is slidably connected to the left and right sides of the upper surface of the movable template, a bottle mouth mold is connected to the upper surface at the middle position of the two bottle preform pulling plates, and a pushing ramp is connected to the front and rear sides of the bottle mouth mold, a push plate is provided on the lower surface of the movable template, a mold core is connected in the middle of the upper surface of the push plate, the upper end of the mold core passes through the movable template and the bottle preform pulling plate, and the front and rear sides of the upper surface of the push plate are connected A push rod is connected, and the lower ends of the left and right sides of the upper end of the push rod are provided with slopes, and the upper end of the push rod passes through the movable template and the bottle preform pulling plate and extends to the upper end of the pushing slope, and a push rod receiving groove is provided inside the mold core at a relative position to the push rod, and the left and right sides of the upper surface of the push plate are connected with reset cones with a conical upper end, and the upper end of the reset cone passes through the movable template and the bottle preform pulling plate and extends to the upper end, and a reset cone receiving groove is provided inside the shear plate at a position relative to the reset cone, and the four corners of the upper surface of the movable template are connected with guide rods, and the guide rods are inserted and connected with the guide plate and the four corners of the fixed template, and the middle of the front and rear sides of the upper surface of the movable template is connected with a guide plate pull rod, and the guide plate pull rod is inserted and connected with the guide plate and the fixed template, the lower end of the guide plate pull rod has the same diameter as the guide plate, and the diameter of the upper end of the guide plate pull rod is the same as the inner diameter of the fixed template.
[0008] Preferably, a heating coil is spirally connected to the middle of the mold core.
[0009] Preferably, a water pipe is connected to the middle of the mold core and located on the upper side of the heating coil.
[0010] Preferably, the length of the lower end of the guide plate pull rod plus the distance from the lower surface of the shear plate to the lower end of the slide rod is greater than the distance from the upper surface of the bottle mouth mold to the upper end of the mold core.
[0011] Preferably, the upper surface of the bottle mouth mold and the pushing slope are parallel to the upper surface of the movable template, and the lower surface of the guide plate and the shear plate are parallel to the lower surface of the mold core.
[0012] Preferably, the length of the slope at the upper end of the push rod is greater than the length from the major diameter of the internal thread of the bottle mouth mold to the outer side of the bottle preform.
[0013] Preferably, a guide sleeve is provided at the connection between the guide plate and the guide plate pull rod.
[0014] (3) Beneficial effects
[0015] The present invention provides a preform mold, which has at least the following advantages compared with the prior art:
[0016] The preform mold is provided with a longer flow channel. When the preform is pulled out, the shear plate will squeeze inward, thereby cutting off the excess flow channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of the utility model;
[0018] Figure 2 This is a bottom view of the utility model;
[0019] Figure 3 This is a front end sectional view of the utility model;
[0020] Figure 4 This is a transverse cross-sectional view of the utility model;
[0021] Figure 5 It is a longitudinal sectional view of the present utility model.
[0022] In the figure: 1. Fixed platen; 2. Mold core; 3. Guide plate; 4. Shear plate; 5. Slide rod; 6. Moving platen; 7. Preform pull plate; 8. Bottle finish mold; 9. Push ramp; 10. Push plate; 11. Mold core; 12. Push rod; 13. Push rod receiving groove; 14. Reset cone; 15. Reset cone receiving groove; 16. Guide rod; 17. Guide plate pull rod; 21. Heating coil; 22. Water pipe. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-5The utility model provides a technical solution: a bottle preform mold, comprising: a fixed template 1 in a concave shape as a whole, a mold core 2 is inserted and connected to the interior of the opening at the lower end of the fixed template 1, a guide plate 3 is provided on the lower surface of the fixed template 1 and is located at the front and rear sides of the mold core 2, a shear plate 4 is slidably connected to the left and right sides of the mold core 2 and the two guide plates 3, a sliding rod 5 is connected to the left and right sides of the lower surface of the mold core 2, and the sliding rod 5 is inserted and connected between the shear plate 4, the lower end of the fixed template 1 is provided with a movable template 6, the upper surface of the movable template 6 is slidably connected to the bottle preform pulling plate 7 on the left and right sides, the upper surface of the two bottle preform pulling plates 7 is connected to the bottle mouth mold 8, the bottle mouth mold 8 is connected to the pushing ramp 9 on the front and rear sides, the lower surface of the movable template 6 is provided with a push plate 10, the upper surface of the push plate 10 is connected to the mold core 11 in the middle, the upper end of the mold core 11 passes through the movable template 6 and the bottle preform pulling plate 7, and the upper surface of the push plate 10 is connected to the push plate 10 on the front and rear sides. The upper end of the push rod 12 is provided with a slope at the lower end on both sides of the upper end of the push rod 12, and the upper end of the push rod 12 passes through the movable template 6 and the bottle preform pulling plate 7 to extend to the upper end of the pushing slope 9. A push rod receiving groove 13 is provided inside the mold core 2 at a position relative to the push rod 12. The left and right sides of the upper surface of the push plate 10 are connected with a reset cone 14 with a conical upper end, and the upper end of the reset cone 14 passes through the movable template 6 and the bottle preform pulling plate 7 to extend to the upper end. A reset cone receiving groove 15 is provided inside the shear plate 4 at a position relative to the reset cone 14. The four corners of the upper surface of the movable template 6 are connected with guide rods 16, and the guide rods 16 are inserted and connected with the four corners of the guide plate 3 and the fixed template 1. A guide plate pull rod 17 is connected in the middle of the front and rear sides of the upper surface of the movable template 6. The guide plate pull rod 17 is inserted and connected with the guide plate 3 and the fixed template 1. The lower end of the guide plate pull rod 17 has the same diameter as the guide plate 3, and the upper end diameter of the guide plate pull rod 17 is the same as the inner diameter of the fixed template 1.
[0025] During use, the mold is first closed, and the molten plastic enters through the fixed mold plate 1 and then the nozzle at the upper end of the mold core 2. When the mold is opened, the movable mold plate 6 and the push plate 10 slide outward together. At this time, the lower end of the guide plate pull rod 17 has the same diameter as the guide plate 3. At this time, the guide plate pull rod 17 will not pull the guide plate 3 until the upper end of the guide plate pull rod 17 is pulled out to a position with a larger diameter. It will then pull the guide plate 3 to move together. When the guide plate 3 moves, it will move with the shear plate 4. At this time, the shear plate 4 will be affected by the slide bar 5 and slide inward inside the guide plate 3, thereby shearing off the excess runner of the preform. After that, the push plate 10 is pulled alone, and the push rod 12 on the upper surface of the push plate 10 moves with the push plate 10. When the bottle preform pulling plate 7 is pushed outward along the sliding groove inside the movable template 6 when it contacts the pushing slope 9, the bottle preform pulling plate 7 will be pushed outward. Since the bottle mouth mold 8 is open, it cannot restrain the bottle preform and will automatically fall down and enter the next process. When the mold is closed again, the push plate 10 is pushed alone. The sharp cone at the upper end of the reset cone 14 will play a guiding role, pushing the bottle preform pulling plate 7 to return to its initial position. At the same time, the push rod 12 will also return to its initial position. Then the upper surface of the push plate 10 will push the shear plate 4 and the guide plate 3. The shear plate 4 is affected by the slide bar 5 and slides inside the guide plate 3 to return to its initial position, completing the mold closing.
[0026] like Figure 1-5 As shown, the embodiment of the present invention provides an implementation method. Based on the above implementation method, a heating coil 21 is spirally connected to the middle of the mold core 2.
[0027] From the analysis of the above structure, it can be seen that connecting the heating coil 21 to the circuit can reduce the time of heat preservation and pressure preservation when closing the mold, thereby accelerating production.
[0028] like Figure 1-5 As shown, the embodiment of the present invention provides an implementation method. Based on the above implementation method, a water pipe 22 is connected to the middle of the mold core 2 and located on the upper side of the heating coil 21.
[0029] From the analysis of the above structure, it can be seen that the water pipe 22 is connected to the pipeline, which can quickly cool the solidification setting before mold opening.
[0030] like Figure 1-5 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the length of the lower end of the guide plate pull rod 17 plus the distance between the lower surface of the shear plate 4 and the lower end of the slide rod 5 is greater than the distance from the upper surface of the bottle mouth mold 8 to the upper end of the mold core 11.
[0031] From the analysis of the above structure, it can be seen that after the preform is completely pulled out, the inner side of the shear plate 4 will just touch the root of the remaining portion of the runner, thereby shearing it off.
[0032] like Figure 1-5 As shown, an embodiment of the utility model provides an implementation method. Based on the above implementation method, the upper surface of the bottle mouth mold 8 and the pushing slope 9 are parallel to the upper surface of the movable template 6, and the lower surface of the guide plate 3 and the shear plate 4 is parallel to the lower surface of the mold core 2.
[0033] From the analysis of the above structure, it can be seen that the upper surfaces of the bottle mouth mold 8 and the pushing slope 9 are parallel to the upper surface of the movable template 6, and the lower surfaces of the guide plate 3 and the shear plate 4 are parallel to the lower surface of the mold core 2, which ensures sealing when closing the mold and prevents the mold core 2 from being deformed by force.
[0034] like Figure 1-5 As shown, the embodiment of the present invention provides an implementation method. Based on the above implementation method, the length of the slope on the upper end of the push rod 12 is greater than the length from the major diameter of the internal thread of the bottle mouth mold 8 to the outside of the bottle embryo.
[0035] From the analysis of the above structure, it can be seen that after the push rod 12 pulls the preform pulling plate 7 apart, the distance between the two bottle mouth molds 8 will be greater than the outer diameter of the preform, causing the preform to fall.
[0036] like Figure 1-5 As shown, an embodiment of the present invention provides an implementation method. Based on the above implementation method, a guide sleeve is provided at the connection between the guide plate 3 and the guide plate pull rod 17.
[0037] From the analysis of the above structure, it can be seen that the guide sleeve at the connection between the guide plate 3 and the guide plate pull rod 17 can improve the accuracy and reduce the friction.
[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A preform mold, characterized in that: include: The fixed template (1) is in the shape of a concave character as a whole. A mold core (2) is inserted and connected to the interior of the opening at the lower end of the fixed template (1). Guide plates (3) are provided on the lower surface of the fixed template (1) and are located on the front and rear sides of the mold core (2). Shear plates (4) are slidably connected to the left and right sides of the mold core (2) and the two guide plates (3). Slide rods (5) are connected to the left and right sides of the lower surface of the mold core (2). The slide rods (5) are inserted and connected to the shear plates (4). A movable template (6) is provided at the lower end of the fixed template (1). The movable template ( 6) The left and right sides of the upper surface are slidably connected with bottle preform pulling plates (7), the upper surface in the middle of the two bottle preform pulling plates (7) is connected with a bottle mouth mold (8), the front and rear sides of the bottle mouth mold (8) are connected with a pushing slope (9), the lower surface of the movable template (6) is provided with a push plate (10), the middle of the upper surface of the push plate (10) is connected with a mold core (11), the upper end of the mold core (11) passes through the movable template (6) and the bottle preform pulling plates (7), the front and rear sides of the upper surface of the push plate (10) are connected with a push rod (12), the push rod (12) The lower ends of the left and right sides of the upper end are provided with slopes, the upper end of the push rod (12) passes through the movable template (6) and the bottle preform pulling plate (7) and extends to the upper end of the push slope (9), the mold core (2) and the push rod (12) are provided with a push rod receiving groove (13) inside the relative position, the upper surface of the push plate (10) is connected with a reset cone (14) with a conical upper end, the upper end of the reset cone (14) passes through the movable template (6) and the bottle preform pulling plate (7) and extends to the upper end, the shear plate (4) is provided with a reset cone (14) inside the relative position. A reset cone receiving groove (15) is provided, and the four corners of the upper surface of the movable template (6) are connected with guide rods (16), and the guide rods (16) are inserted and connected with the four corners of the guide plate (3) and the fixed template (1). A guide plate pull rod (17) is connected in the middle of the front and rear sides of the upper surface of the movable template (6), and the guide plate pull rod (17) is inserted and connected with the guide plate (3) and the fixed template (1). The lower end of the guide plate pull rod (17) has the same diameter as the guide plate (3), and the upper end of the guide plate pull rod (17) has the same diameter as the inner diameter of the fixed template (1).
2. The preform mold according to claim 1, characterized in that: A heating coil (21) is connected in a spiral shape in the middle of the mold core (2).
3. The preform mold according to claim 2, characterized in that: A water pipe (22) is connected to the middle of the mold core (2) and located on the upper side of the heating coil (21).
4. The preform mold according to claim 1, characterized in that: The length of the lower end of the guide plate pull rod (17) plus the distance between the lower surface of the shear plate (4) and the lower end of the slide rod (5) is greater than the distance between the upper surface of the bottle mouth mold (8) and the upper end of the mold core (11).
5. The preform mold according to claim 1, characterized in that: The upper surfaces of the bottle mouth mold (8) and the pushing slope (9) are parallel to the upper surface of the movable template (6); the lower surfaces of the guide plate (3) and the shear plate (4) are parallel to the lower surface of the mold core (2).
6. The preform mold according to claim 1, characterized in that: The length of the slope at the upper end of the push rod (12) is greater than the length from the major diameter of the internal thread of the bottle mouth mold (8) to the outer side of the bottle embryo.
7. The preform mold according to claim 1, characterized in that: A guide sleeve is provided at the connection between the guide plate (3) and the guide plate pull rod (17).