Blow molding dies for blow molding machines
By setting a micropore array and a combined venting system on the surface of the blow molding mold cavity, and cooperating with cooling water circulation, the problem of air accumulation in thin-walled areas was solved, improving the molding quality and production efficiency of pure water barrels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU XUANHEZHIXING PLASTIC PROD CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-26
AI Technical Summary
When traditional blow molding molds are used to form purified water barrels, it is difficult for gas to escape quickly from the thin-walled parts, resulting in air bubbles and dents, which affects product quality and yield.
A micropore array is set on the surface of the mold cavity, and a combined exhaust system is provided, including the micropore array, auxiliary exhaust channels and main exhaust channels, in conjunction with a cooling water circulation system to achieve rapid exhaust and cooling.
It effectively avoids bubble defects, improves product surface quality and pass rate, shortens molding cycle, increases production efficiency, and reduces production costs.
Smart Images
Figure CN224276156U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of blow molding die devices, specifically to blow molding dies used in blow molding machines. Background Technology
[0002] In the plastic packaging industry, blow molding machines are the core equipment for producing purified water barrels, and the structural design of the blow molding mold directly affects product quality and production efficiency. Traditional purified water barrel blow molding molds typically consist of symmetrically arranged left and right halves, with the opening and closing action achieved through a drive mechanism. The mold interior has cavities corresponding to the product shape and is equipped with simple venting channels and cooling water channels. However, existing blow molding molds have not effectively solved the problem of air accumulation in thin-walled areas during the molding process. Because some areas of the purified water barrel have thin walls, gas is difficult to expel quickly during blow molding. The accumulated gas causes defects such as bubbles and dents on the product surface, which not only reduces the product yield but also affects the appearance and performance of the purified water barrel. Therefore, it is imperative to optimize and improve the mold structure. Utility Model Content
[0003] (a) Technical issues:
[0004] This invention provides a blow molding die for a blow molding machine, which effectively solves the problem of air accumulation in the thin-walled part of a pure water barrel, resulting in air bubble defects and improving product quality and pass rate.
[0005] (II) Technical Content:
[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a blow molding die for a blow molding machine, including a support and a die slidably disposed inside the support. The die includes a left half-die and a right half-die arranged symmetrically. Both the left half-die and the right half-die are slidably disposed inside the support via linear slide rails. Electric push rods for driving the left half-die and the right half-die to move and close the die are respectively provided on the left and right sides of the support. Both the left half-die and the right half-die are provided with cavities that match the shape of the product, and micropore arrays are distributed on the surface of the cavities. Both the left half-die and the right half-die are provided with a combined exhaust system, which includes a main exhaust groove extending along the die mating surface and an auxiliary exhaust channel communicating with the micropore array.
[0007] Furthermore, the pore size of the micropore array is 0.05-0.2 mm, and the micropore array is connected to the auxiliary exhaust channel through a tapered transition section.
[0008] Furthermore, the auxiliary exhaust duct is horizontally arranged and its two ends are respectively connected to the main exhaust duct.
[0009] Furthermore, the main venting groove is vertically arranged and penetrates the upper and lower bottom surfaces of the left or right half mold.
[0010] Furthermore, both the left and right half molds are provided with cavities for cooling water circulation, and the upper and lower ends of the cavities are respectively connected to a return water pipe and a water inlet pipe.
[0011] (III) Technical Effects:
[0012] Compared with the prior art, the advantages of this utility model are as follows: By setting a micropore array on the surface of the mold cavity and combining it with a combined venting system, the micropore array, auxiliary venting channel, and main venting groove form a complete venting path, enabling the gas in thin-walled areas to be quickly discharged, avoiding the generation of bubble defects, and significantly improving the surface quality and pass rate of the product; the specific layout of the auxiliary venting channel and the main venting groove optimizes the venting path and improves venting efficiency; the cooling water circulation cavity set inside the mold realizes cooling water circulation through the water inlet pipe and the water return pipe, which can quickly cool the mold, shorten the molding cycle, and improve production efficiency; at the same time, the reasonable structural design facilitates installation and maintenance, reduces production costs, and enhances the practicality and market competitiveness of the mold. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the blow molding die for a blow molding machine according to this utility model. Figure 1 .
[0014] Figure 2 This is a three-dimensional structural diagram of the blow molding die for a blow molding machine according to this utility model. Figure 2 .
[0015] Figure 3 This is a three-dimensional structural diagram of the blow molding die for a blow molding machine according to this utility model. Figure 3 .
[0016] Figure 4 This is a schematic diagram of the main structure of the blow molding die used in the blow molding machine according to this utility model.
[0017] Figure 5 This is a schematic cross-sectional view of the blow molding die for a blow molding machine according to this utility model. Figure 1 .
[0018] Figure 6 This is a schematic cross-sectional view of the blow molding die for a blow molding machine according to this utility model. Figure 2 .
[0019] Figure 7 This is a schematic diagram of area A of the blow molding die used in a blow molding machine according to this utility model.
[0020] As shown in the figure: 1. Support; 2. Left half mold; 3. Right half mold; 4. Linear slide rail; 5. Electric push rod; 6. Cavity; 7. Micro-pore array; 8. Main venting groove; 9. Auxiliary venting channel; 10. Conical transition section; 11. Cavity; 12. Water inlet pipe; 13. Water return pipe. Detailed Implementation
[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", 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 structure and operation. Therefore, they should not be construed as limitations on this utility model.
[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., 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 according to the specific circumstances.
[0023] The present invention will now be described in further detail with reference to the accompanying drawings.
[0024] Combined with appendix Figure 1 To be continued Figure 7 A blow molding die for a blow molding machine includes a support 1 and a die slidably disposed inside the support 1. The die includes a left half die 2 and a right half die 3 symmetrically arranged. Both the left half die 2 and the right half die 3 are slidably disposed inside the support 1 via linear slide rails 4. Electric push rods 5 for driving the left half die 2 and the right half die 3 to move and close the die are respectively provided on the left and right sides of the support 1. Both the left half die 2 and the right half die 3 are provided with cavities 6 that match the shape of the product. Micropore arrays 7 are distributed on the surface of the cavities 6. Both the left half die 2 and the right half die 3 are provided with a combined exhaust system. The combined exhaust system includes a main exhaust groove 8 extending along the die mating surface and an auxiliary exhaust channel 9 communicating with the micropore array 7.
[0025] The micropore array 7 has a pore diameter of 0.05-0.2mm. The micropore array 7 is connected to the auxiliary exhaust channel 9 through a tapered transition section 10. The auxiliary exhaust channel 9 is horizontally arranged and its two ends are respectively connected to the main exhaust channel 8. The main exhaust channel 8 is vertically arranged and penetrates the upper and lower bottom surfaces of the left half mold 2 or the right half mold 3.
[0026] Both the left half mold 2 and the right half mold 3 are provided with cavities 11 for cooling water circulation. The upper and lower ends of the cavities 11 are respectively connected to a return water pipe 13 and a water inlet pipe 12.
[0027] The working principle of this utility model is as follows: This equipment achieves blow molding of pure water barrels based on the opening and closing motion of the mold, and the coordinated operation of the exhaust system and the cooling system. The bracket 1 provides support and sliding track for the mold. The electric push rod 5 drives the left half mold 2 and the right half mold 3 to perform mold closing and opening actions through the linear slide rail 4. The micropore array 7, auxiliary exhaust channel 9 and main exhaust groove 8 on the surface of the cavity 6 form a combined exhaust system, which quickly discharges the gas in the mold cavity during the blow molding process, avoiding the accumulation of air and the generation of bubble defects. The cavity 11 inside the left half mold 2 and the right half mold 3 realizes the cooling water circulation through the water inlet pipe 12 and the water return pipe 13 to cool the mold, accelerate the molding speed and ensure product quality.
[0028] The working process of this utility model is as follows:
[0029] 1. Initial preparation: In the initial state, the left half mold 2 and the right half mold 3 are in the separated position within the bracket 1 via the linear slide rail 4, and the electric push rod 5 is in the retracted state, ready to receive raw materials.
[0030] 2. Mold closing: The electric push rod 5 extends and pushes the left half mold 2 and the right half mold 3 to slide towards the middle along the linear slide rail 4 respectively. At the same time, the heated and softened plastic material is fed into the mold cavity 6 from top to bottom. After the feeding is completed, the cavities 6 of the left half mold 2 and the right half mold 3 are joined and fitted together, completing the mold closing action and forming a complete pure water bucket mold cavity.
[0031] 3. Blow Molding: Air is blown from the bottom into the plastic material inside the cavity using an external air blowing device, causing the plastic material to expand and adhere to the inner wall of the cavity 6. During this process, the micropore array 7 on the surface of the cavity 6 captures residual gas. The gas enters the auxiliary exhaust channel 9 through the micropore array 7, and then flows from the auxiliary exhaust channel 9 into the main exhaust channel 8, finally exiting the mold through the main exhaust channel 8. This ensures that the gas inside the cavity is discharged in a timely manner, avoiding gas accumulation that could affect the molding quality.
[0032] 4. Cooling and shaping: During blow molding, cooling water flows from the inlet pipe 12 into the cavity 11 inside the left half mold 2 and the right half mold 3. It circulates in the cavity 11, absorbs the heat of the mold, and then flows out from the return pipe 13. The cooling water circulation carries away the heat of the mold, so that the plastic material in the cavity cools and shapes quickly.
[0033] 5. Mold opening and part removal: After the plastic raw material cools and solidifies, the electric push rod 5 retracts, pulling the left half mold 2 and the right half mold 3 to slide in the opposite direction along the linear slide rail 4 to separate them. The mold is opened, the molded pure water bucket is taken out, and one blow molding cycle is completed, ready for the next production.
[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A blow molding die for a blow molding machine, comprising a support (1) and a die slidably disposed inside the support (1), characterized in that: The mold includes a left half mold (2) and a right half mold (3) arranged symmetrically. The left half mold (2) and the right half mold (3) are slidably disposed inside the bracket (1) via a linear slide rail (4). The left and right sides of the bracket (1) are respectively provided with electric push rods (5) for driving the left half mold (2) and the right half mold (3) to move and close the mold. Both the left half mold (2) and the right half mold (3) are provided with cavities (6) that match the shape of the product, and micro-pore arrays (7) are distributed on the surface of the cavity (6); both the left half mold (2) and the right half mold (3) are provided with combined exhaust systems, which include a main exhaust groove (8) extending along the mold mating surface and an auxiliary exhaust channel (9) connected to the micro-pore array (7).
2. The blow molding die for a blow molding machine according to claim 1, characterized in that: The micropore array (7) has a pore size of 0.05-0.2 mm, and the micropore array (7) is connected to the auxiliary exhaust channel (9) through a tapered transition section (10).
3. The blow molding die for a blow molding machine according to claim 2, characterized in that: The auxiliary exhaust duct (9) is horizontally arranged and its two ends are respectively connected to the main exhaust duct (8).
4. The blow molding die for a blow molding machine according to claim 3, characterized in that: The main exhaust groove (8) is vertically arranged and penetrates the upper and lower bottom surfaces of the left half mold (2) or the right half mold (3).
5. The blow molding die for a blow molding machine according to claim 1, characterized in that: The left half mold (2) and the right half mold (3) are both provided with cavities (11) for cooling water circulation. The upper and lower ends of the cavity (11) are respectively connected to the return water pipe (13) and the inlet water pipe (12).