Bottle blowing mold
By introducing a return spring-driven push block and a sluice gate structure into the blow molding die, the problem of difficult material unloading of plastic bottles in traditional molds is solved, achieving automatic demolding and ventilation, thus improving work efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional blow molding molds often cause plastic bottles to get stuck on protrusions after molding, making it difficult to unload the material, increasing the burden on operators and affecting work efficiency.
Design a blow molding die, including a first side mold, a second side mold and a demolding mechanism. A return spring drives a pusher block to push the sheet metal to push the plastic bottle down. Combined with a slide groove and air guide hole structure, automatic demolding and ventilation heat dissipation are achieved.
It enables automated assisted demolding of plastic bottles, improving work efficiency, reducing dents, increasing product yield, and extending the service life of mold components.
Smart Images
Figure CN224060432U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of blow molding machinery technology, and in particular to a blow molding die. Background Technology
[0002] Blow molding machinery refers to equipment used to blow plastic granules or preforms into bottles through specific processes. Specifically, blow molding machines can blow recycled plastics or preforms into bottles through a particular process, and are widely used in industries such as beverages, pharmaceuticals, cosmetics, and food processing to replace glass containers.
[0003] Blow molding machinery requires the use of blow molding molds to shape the blown plastic bottles. A blow molding mold is a mold specifically designed for producing plastic bottles. It employs blow molding technology, injecting molten plastic raw material into the mold, and then using air blowing to expand the plastic within the mold, ultimately forming a plastic bottle with the desired shape and size.
[0004] When processing plastic bottles, traditional plastic bottles usually have an upward-curved recess on the outside, so it is necessary to set a protrusion in the blow molding mold for molding. However, after molding, the plastic bottle is easily stuck to the protrusion, making it difficult to unload, which increases the workload of the operator and affects work efficiency. In this regard, this application proposes a blow molding mold. Utility Model Content
[0005] To address the aforementioned problems, this application provides a blow molding die.
[0006] The blow molding die provided in this application adopts the following technical solution:
[0007] A blow molding die includes a first side mold, a second side mold disposed on one side adapted to the first side mold, and a demolding mechanism disposed within the first side mold for assisting demolding. A blow molding cavity is provided between the inner tops of the first and second side molds. The blow molding cavity of the first and second side molds is provided with a plurality of protrusions. The demolding mechanism includes a U-shaped rod slidably disposed within the first side mold and engaging with one side of the second side mold, a connecting rod fixedly disposed in the middle of the inner side of the U-shaped rod, a sheet metal fixedly disposed within the blow molding cavity of the first side mold and seamlessly connected to the blow molding cavity, a push block fixedly disposed between one end of the connecting rod and the middle of the outer side of the sheet metal, and a return spring disposed within the first side mold for pushing the sheet metal into the blow molding cavity when the first and second side molds are separated.
[0008] By adopting the above technical solution, the separation of the first and second side molds after blow molding allows components such as the pusher block to push the plastic bottle left in the blow molding cavity by deforming the sheet metal under the elastic force of the return spring. This provides automatic assisted demolding of the plastic bottle, facilitates material unloading, improves work efficiency, and ensures that the sheet metal is seamlessly connected to the blow molding cavity, preventing the sheet metal from leaving dents or other marks on the surface of the plastic bottle after blow molding.
[0009] Preferably, an inner bottom mold core communicating with the blow molding cavity is provided between the bottom of the first side mold and the second side mold, and a positioning mechanism is provided between the first side mold and the second side mold. The positioning mechanism includes a plurality of positioning holes opened on one side of the second side mold and a plurality of positioning blocks fixed on one side of the first side mold and fitted into the positioning holes.
[0010] By adopting the above technical solution, after the positioning block is inserted into the corresponding positioning hole, the first side mold and the second side mold can be connected, and the first side mold and the second side mold can be quickly closed to form a blow molding die.
[0011] Preferably, a groove is provided in the first side mold, and the U-shaped rod is slidably connected in the groove of the first side mold.
[0012] By adopting the above technical solution, the first side mold can limit the U-shaped rod through the slide groove, so that the U-shaped rod can only move laterally.
[0013] Preferably, a limiting groove communicating with the slide groove is formed in the first side mold, the reset spring is fixedly connected in the limiting groove of the first side mold, a connecting ring is fixedly provided between the outer wall of the connecting rod and one end of the reset spring, the connecting ring is slidably connected in the limiting groove of the first side mold, a through hole communicating with the slide groove is formed in the outer wall of the first side mold, and a plurality of air guide holes are formed in the U-shaped rod and the connecting ring.
[0014] By adopting the above technical solution, the movement of components such as the U-shaped rod during demolding, combined with the connection of the slide groove, air guide hole and through hole, can accelerate the flow and exchange of air between the first side mold and the outside air, thereby ventilating and dissipating heat for the U-shaped rod and other components in the first side mold and extending the service life of the U-shaped rod and other components.
[0015] In summary, this application includes at least one of the following beneficial technical effects:
[0016] 1. By separating the first and second side molds after blow molding, the pusher and other components can push the plastic bottle left in the blow molding cavity after blow molding by pushing the sheet metal to deform under the elastic force of the return spring. This provides automatic assisted demolding of the plastic bottle, facilitates material unloading, improves work efficiency, and because the sheet metal is seamlessly connected to the blow molding cavity, the sheet metal will not leave dents or other marks on the surface of the plastic bottle after blow molding, thus improving the product yield.
[0017] 2. By moving the U-shaped rod and other components during demolding, and in conjunction with the connection of the slide groove, air guide hole and through hole, the air flow and exchange between the first side mold and the outside air can be accelerated, thereby ventilating and dissipating heat for the U-shaped rod and other components in the first side mold, and extending the service life of the U-shaped rod and other components. By closing the first side mold and the second side mold, the U-shaped rod can be completely pushed into the slide groove, and the sheet metal is pulled back to its original position by the push block, so as not to affect the bottle blowing, which is convenient and practical. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a blow molding die according to an embodiment of this application;
[0019] Figure 2 This is a front view schematic diagram mainly illustrating the first side mold in the embodiments of this application;
[0020] Figure 3 This is a front view schematic diagram illustrating the second side mold, which is the main embodiment of this application;
[0021] Figure 4 This is a top view connecting the internal structures of the first and second side molds, which are the main features of the embodiments of this application.
[0022] Figure 5 The embodiments of this application mainly embody Figure 4 Enlarged view of the structure of A in the middle;
[0023] Reference numerals in the attached drawings: 1. First side mold; 11. Second side mold; 12. Blow molding cavity; 13. Protrusion; 14. Inner bottom mold core; 2. Positioning hole; 21. Positioning block; 3. U-shaped rod; 31. Connecting rod; 32. Push block; 33. Sheet metal; 34. Return spring; 35. Connecting ring; 4. Slide groove; 41. Limiting groove; 42. Through hole; 43. Air guide hole. Detailed Implementation
[0024] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.
[0025] This application discloses a blow molding die.
[0026] A blow molding die, as shown Figure 1-3 The mold includes a first side mold 1, a second side mold 11, and a demolding mechanism. The first side mold 1 and the second side mold 11 form the existing blow molding mold. Its specific internal structure and principle have been disclosed and will not be elaborated here. The second side mold 11 is located on the side that is compatible with the first side mold 1. The second side mold 11 and the first side mold 1 are the same size and compatible.
[0027] Reference Figure 1-3A blow molding cavity 12 is provided between the inner top of the first side mold 1 and the second side mold 11. Several protrusions 13 are provided in the blow molding cavity 12 of the first side mold 1 and the second side mold 11. An inner bottom mold core 14 is provided between the bottom of the first side mold 1 and the second side mold 11 and communicates with the blow molding cavity 12. The inner bottom mold core 14 can pass through a mold base for shaping the bottom of the plastic bottle. This is a public technology and will not be described in detail here. The preform is placed on the top of the blow molding cavity 12 and blown and then cooled. A plastic bottle can be formed under the shaping of the first side mold 1 and the second side mold 11. Several protrusions 13 will form recesses on the outside of the plastic bottle, adding shape to the outside of the plastic bottle.
[0028] Reference Figure 2-3 A positioning mechanism is provided between the first side mold 1 and the second side mold 11. The positioning mechanism includes a plurality of positioning holes 2 opened on one side of the second side mold 11 and a plurality of positioning blocks 21 fixed on one side of the first side mold 1 and fitted into the positioning holes 2. After the positioning blocks 21 are inserted into the corresponding positioning holes 2, they can connect the first side mold 1 and the second side mold 11 and facilitate the quick closing of the first side mold 1 and the second side mold 11 to form a blow molding mold.
[0029] Reference Figure 2 , Figure 4 and Figure 5 The demolding mechanism includes a U-shaped rod 3 slidably disposed within the first side mold 1 and engaging with one side of the second side mold 11; a connecting rod 31 fixedly disposed in the middle of the inner side of the U-shaped rod 3; a sheet metal 33 fixedly disposed within the blow molding cavity 12 of the first side mold 1 and seamlessly connected to the blow molding cavity 12; a pusher 32 fixedly disposed between one end of the connecting rod 31 and the middle of the outer side of the sheet metal 33; and a pusher block 32 disposed within the first side mold 1 for pushing the sheet metal 33 toward the blow molding cavity 11 when the first side mold 1 and the second side mold 11 separate. The internally pushed return spring 34 and the connecting rod 31 can connect the U-shaped rod 3 and the push block 32. The push block 32 can connect the sheet metal 33 and the connecting rod 31. The sheet metal 33 can be existing galvanized sheet metal, which has excellent ductility and plasticity. It can deform after being pushed and return to its original shape after being released. It is often used for household sheet metal sheds and sheet metal doors. The sheet metal 33 can be welded into the blow molding cavity 12 of the first side mold 1 and seamlessly connected to the blow molding cavity 12 through subsequent grinding.
[0030] When the plastic bottle needs to be removed after blow molding and the first side mold 1 and the second side mold 11 are separated, the two ends of the U-shaped rod 3 will move outward from the first side mold 1 and extend outward from the first side mold 1 due to the loss of the abutment of the second side mold 11. At this time, in conjunction with the connection of the connecting rod 31 and other components, the push block 32 will move towards the blow molding cavity 12, so that the push block 32 can push the middle part of the sheet metal 33 to deform and push the plastic bottle left in the blow molding cavity 12 after blow molding, thereby automatically assisting the demolding of the plastic bottle. Since the sheet metal 33 is seamlessly connected to the blow molding cavity 12, the sheet metal 33 will not leave dents or other marks on the surface of the plastic bottle after blow molding, thus improving the product yield.
[0031] Reference Figure 4-5 The first side mold 1 has a sliding groove 4, and the U-shaped rod 3 is slidably connected in the sliding groove 4 of the first side mold 1. The first side mold 1 has a limiting groove 41 that communicates with the sliding groove 4. The return spring 34 is fixedly connected in the limiting groove 41 of the first side mold 1. The first side mold 1 can limit the U-shaped rod 3 through the sliding groove 4, so that the U-shaped rod 3 can only move laterally. The first side mold 1 can support and fix the return spring 34 through the limiting groove 41.
[0032] Reference Figure 4-5 A connecting ring 35 is fixed between the outer wall of the connecting rod 31 and one end of the return spring 34. The connecting ring 35 is slidably connected in the limiting groove 41 of the first side mold 1. The outer wall of the first side mold 1 is provided with a through hole 42 communicating with the slide groove 4. Several air guide holes 43 are provided in the U-shaped rod 3 and the connecting ring 35. The connecting ring 35 can connect the return spring 34 and the connecting rod 31, so that the push block 32 can be pushed towards the blow molding cavity 12 under the elastic force of the return spring 34. By moving the U-shaped rod 3 and other components during demolding, and with the connection of the slide groove 4, the limiting groove 41, the air guide holes 43 and the through hole 42, the air flow and air exchange between the first side mold 1 and the outside air can be accelerated, thereby ventilating and dissipating heat for the U-shaped rod 3 and other components in the first side mold 1 and extending the service life of the U-shaped rod 3 and other components.
[0033] The implementation principle of a blow molding die in this application embodiment is as follows:
[0034] When in use, the preform is placed on top of the blow molding cavity 12, and the first side mold 1 and the second side mold 11 are closed. When the mold is closed, the U-shaped rod 3 can be completely pushed into the slide groove 4 of the first side mold 1 under the pressure of the second side mold 11. With the connection of the connecting rod 31 and other components, the sheet metal 33 will be pulled back to its original position by the push block 32, so as not to affect the blow molding.
[0035] Next, the bottle is blown and cooled. The preform can be shaped into a plastic bottle under the shaping of the first side mold 1 and the second side mold 11. When the plastic bottle needs to be removed after blowing and the first side mold 1 and the second side mold 11 are separated, the two ends of the U-shaped rod 3 will move outward from the first side mold 1 and extend outward from the first side mold 1 due to the loss of the abutment of the second side mold 11. At this time, with the connection of the connecting rod 31 and other components, the push block 32 will move towards the blow molding cavity 12, so that the push block 32 can push the middle part of the sheet metal 33 to deform and push the plastic bottle left in the blow molding cavity 12 after blowing. This will automatically assist in demolding the plastic bottle, facilitate material unloading, improve work efficiency, and because the sheet metal 33 is seamlessly connected to the blow molding cavity 12, the sheet metal 33 will not leave dents or other marks on the surface of the plastic bottle after blowing, thus improving the product yield.
[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A bottle blowing mold, comprising a first side mold (1), a second side mold (11) arranged at one side of the first side mold (1), and a demolding mechanism arranged in the first side mold (1) and used for assisting demolding, wherein a bottle blowing mold cavity (12) is arranged between the inner top of the first side mold (1) and the second side mold (11), and a plurality of protrusions (13) are arranged in the bottle blowing mold cavity (12) of the first side mold (1) and the second side mold (11), characterized in that: the demolding mechanism comprises a U-shaped rod (3) slidingly arranged in the first side mold (1) and abutting against one side of the second side mold (11), a connecting rod (31) fixedly arranged at the middle of the inner side of the U-shaped rod (3), a sheet iron (33) fixedly arranged in the bottle blowing mold cavity (12) of the first side mold (1) and seamlessly connected with the bottle blowing mold cavity (12), a push block (32) fixedly arranged between one end of the connecting rod (31) and the middle of the outer side of the sheet iron (33), and a reset spring (34) arranged in the first side mold (1) and used for pushing the sheet iron (33) into the bottle blowing mold cavity (12) when the first side mold (1) and the second side mold (11) are separated. An inner bottom mold core (14) is arranged between the bottoms of the first side mold (1) and the second side mold (11) and communicates with the bottle blowing mold cavity (12).
2. A bottle blowing mold according to claim 1, characterized in that: A positioning mechanism is arranged between the first side mold (1) and the second side mold (11), and the positioning mechanism comprises a plurality of positioning holes (2) arranged at one side of the second side mold (11), and a plurality of positioning blocks (21) fixedly arranged at one side of the first side mold (1) and inserted into the positioning holes (2).
3. A bottle blowing mold according to claim 1, characterized in that: A sliding groove (4) is arranged in the first side mold (1), and the U-shaped rod (3) is slidingly connected in the sliding groove (4) of the first side mold (1).
4. A bottle blowing mold according to claim 1, characterized in that: A limiting groove (41) is arranged in the first side mold (1) and communicates with the sliding groove (4), and the reset spring (34) is fixedly connected in the limiting groove (41) of the first side mold (1).
5. A bottle blowing mold according to claim 4, characterized in that: A connecting ring (35) is fixedly arranged between the outer wall of the connecting rod (31) and one end of the reset spring (34), and the connecting ring (35) is slidingly connected in the limiting groove (41) of the first side mold (1).
6. A bottle blowing mold according to claim 5, characterized in that: A through hole (42) is arranged in the outer wall of the first side mold (1) and communicates with the sliding groove (4).
7. A bottle blowing mold according to claim 6, characterized in that: A plurality of air guide holes (43) are arranged in the U-shaped rod (3) and the connecting ring (35).
8. A bottle blowing mold according to claim 7, characterized in that: