A BK hollow blow molding mold venting structure

Abstract

This utility model discloses a venting structure for a BK hollow blow molding mold, including a base, a first cooling mechanism, and a second cooling mechanism. The base consists of two symmetrically arranged bases, each with an aluminum mold body fixedly connected to its front side. Venting holes are evenly distributed along the left and right sides of the inner wall and the junction of the bottom wall of the aluminum mold body. Venting inserts are inserted into the venting holes. Venting through holes are located on the left and right sides of the aluminum mold body, respectively connected to venting holes on the same side of the same aluminum mold body. The first cooling mechanism is located on both sides of the aluminum mold body, and the second cooling mechanism is located at the opposite outer ends of the two aluminum mold bodies. A thin plate insert mechanism is located on the front side of each aluminum mold body. This utility model solves the problem of poor product surface finish by adding venting inserts to the mold body, resulting in a simple structure and high stability.

Description

Technical Field

[0001] This utility model relates to the field of hollow blow molding mold technology, specifically a venting structure for a BK hollow blow molding mold. Background Technology

[0002] Hollow blow molding is a molding process that involves placing a semi-molten preform (parent) obtained from extrusion or injection molding into a mold of various shapes, inflating it with compressed air to make it adhere tightly to the mold cavity wall, and then cooling and demolding to obtain a hollow product. This technology is widely used in beverage packaging (accounting for 60% of the market), automotive fuel tanks, chemical containers, and daily necessities, and has the advantages of high material utilization (waste rate <5%) and low mold cost.

[0003] Hollow blow molding is a core process in plastic processing. It involves heating and softening a thermoplastic preform, then using compressed air to expand it and fit it into a mold. Finally, it cools and solidifies into a hollow product. Traditionally, this product is designed as a single mold body with a sandblasted surface, resulting in poor venting and a rough surface finish. Therefore, a new venting structure for BK hollow blow molding molds is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a venting structure for a BK hollow blow molding mold. By adding venting inserts to the mold body, the problem of poor product smoothness is solved. The structure is simple, the stability is high, and it can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a BK hollow blow molding mold exhaust structure, comprising a base, a cooling mechanism one, and a cooling mechanism two;

[0006] The base consists of two symmetrically arranged bases. An aluminum mold body is fixedly connected to the front side of each base. Evenly distributed venting holes are formed on the left and right sides of the inner wall of the aluminum mold body and at the junction of the bottom wall. Venting inserts are inserted into the venting holes. Venting through holes are formed on the left and right sides of the aluminum mold body, respectively connecting to venting holes on the same side of the same aluminum mold body. Cooling mechanism one is provided on the left and right sides of the aluminum mold body, and cooling mechanism two is provided at the opposite outer ends of the two aluminum mold bodies. A thin plate insert mechanism is provided on the front side of each aluminum mold body, cooperating with cooling mechanism one and cooling mechanism two located on the same aluminum mold body. Adding venting inserts to the mold body solves the problem of poor product surface finish, resulting in a simple structure and high stability.

[0007] Furthermore, the cooling mechanism includes an inlet, an outlet, a transition pipe, an outlet channel, an inlet channel, and a connecting channel. The inlets are respectively located at the middle of the left and right ends of the two bases. The outlets are opened on the left and right sides of the relatively inner ends of the two bases. The inlet channels are opened in the middle of the left and right sides of the aluminum mold body. The outlet channels are opened at the left and right ends of the relatively inner sides of the two aluminum mold bodies. The inlet channels are connected to the adjacent inlet on the rear side, and the outlet channels are connected to the adjacent outlet on the rear side through transition pipes. The outlet channels on the left and right sides and the front sides of the inlet channels on the same side are connected through connecting channels to achieve sealing of the left and right sides of the aluminum mold body.

[0008] Furthermore, the cooling mechanism also includes a sealing bolt 1 and a sealing bolt 2. The stud portion of the sealing bolt 2 is threaded into the interior of the connecting channel, and the stud portion of the sealing bolt 1 is threaded into the interior of the transition pipe, thereby sealing the liquid inlet channel and the liquid outlet channel.

[0009] Furthermore, the second cooling mechanism includes a connection port and a circulation pipe. The connection ports are respectively opened on the left and right sides of the two bases opposite to the outer sides, and the circulation pipes are respectively opened on the left and right sides of the two aluminum mold bodies opposite to the outer sides. The circulation pipes are respectively connected to the adjacent connection ports on the rear side to achieve heat dissipation of the bottom wall of the aluminum mold body.

[0010] Furthermore, the second cooling mechanism also includes a connecting groove, which is respectively opened on the front side of the two aluminum mold bodies. The two circulation pipes located on the same aluminum mold body are connected through the connecting groove to realize the connection between the two circulation pipes.

[0011] Furthermore, the thin plate insert mechanism includes a thin plate, a plug strip, a plug, and a rubber sealing ring. The thin plate is fixedly connected to the front side of the aluminum mold body. The rear side of the thin plate is provided with a plug strip, which is inserted into the interior of the adjacent connecting groove on the rear side. The rear side of the thin plate is provided with evenly distributed plugs. The outer arc surface of the plug is movably fitted with a rubber sealing ring. The plug is inserted into the interior of the adjacent liquid outlet channel and liquid inlet channel. The outer surface of the rubber sealing ring contacts the inner wall of the adjacent liquid outlet channel and liquid inlet channel, thereby achieving sealing of the front side of the aluminum mold body.

[0012] Furthermore, heat dissipation grooves are provided on the opposite outer sides of the two aluminum mold bodies. The heat dissipation grooves are located between the two circulation pipes of the same aluminum mold body, and heat dissipation fins are fixedly connected inside the heat dissipation grooves to improve heat dissipation efficiency.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The blow molding equipment controls the closing of two aluminum mold bodies, with the hot plastic being sandwiched between them. Then, the blow molding equipment blows the hot plastic, causing it to expand. The air between the aluminum mold bodies and the hot plastic is compressed, passes through the venting insert, enters the venting hole, and is then discharged through the venting through-hole, preventing air residue and improving the smoothness of the product. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the aluminum mold body structure of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the aluminum mold body of this utility model;

[0018] Figure 4 This is a schematic diagram of the bottom cross-sectional structure of the aluminum mold body of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the base of this utility model;

[0020] Figure 6 This is a schematic diagram of the thin plate insert mechanism of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the exhaust insert of this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of the heat sink of this utility model.

[0023] In the diagram: 1. Base, 2. Aluminum mold body, 3. Exhaust insert, 4. Thin plate insert mechanism, 41. Thin plate, 42. Plug, 43. Plug, 44. Rubber sealing ring, 5. Cooling mechanism one, 51. Liquid inlet, 52. Liquid outlet, 53. Sealing bolt one, 54. Transition pipe, 55. Liquid outlet channel, 56. Liquid inlet channel, 57. Connecting channel, 58. Sealing bolt two, 6. Cooling mechanism two, 61. Connecting port, 62. Circulation pipe, 63. Connecting groove, 7. Heat dissipation groove, 8. Exhaust branch hole, 9. Exhaust through hole, 10. Heat sink. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-8This embodiment provides a technical solution: a BK hollow blow molding mold exhaust structure, including a base 1, a cooling mechanism 1 5 and a cooling mechanism 2 6;

[0026] The base 1 consists of two symmetrically arranged bases 1. Each base 1 has an aluminum mold body 2 fixedly connected to its front side. The aluminum mold body 2 has evenly distributed exhaust holes 8 at the junction of its inner wall, left and right sides and bottom wall. Each exhaust hole 8 has an exhaust insert 3 inserted inside it. Each aluminum mold body 2 has an exhaust through hole 9 on its left and right sides, which are connected to the exhaust holes 8 on the same side of the same aluminum mold body 2. Each aluminum mold body 2 has a cooling mechanism 5 on its left and right sides. Each aluminum mold body 2 has a cooling mechanism 6 at its opposite outer ends. Each aluminum mold body 2 has a thin plate insert mechanism 4 on its front side, which is configured to cooperate with the cooling mechanism 5 and the cooling mechanism 6 on the same aluminum mold body 2.

[0027] The cooling mechanism 5 includes an inlet 51, an outlet 52, a transition pipe 54, an outlet channel 55, an inlet channel 56, and a connecting channel 57. The inlets 51 are located at the middle of the left and right ends of the two bases 1. Outlets 52 are located on the left and right sides of the relatively inner ends of the two bases 1. Inlet channels 56 are located at the middle of the left and right sides of the aluminum mold body 2. Outlet channels 55 are located at the left and right ends of the relatively inner sides of the two aluminum mold bodies 2. The inlet channels 56 are connected to the adjacent inlet 51 on the rear side, and the outlet channels 55 are connected to the adjacent outlet 52 on the rear side via the transition pipe 54. The front sides of the liquid outlet channel 55 and the liquid inlet channel 56 are connected by a connecting channel 57. The cooling mechanism 5 also includes a sealing bolt 53 and a sealing bolt 58. The stud part of the sealing bolt 58 is threaded into the inside of the connecting channel 57, and the stud part of the sealing bolt 53 is threaded into the inside of the transition pipe 54. Fluoroether sealing rings are provided at the positions of the liquid inlet 51, the adjacent liquid inlet channel 56, the liquid outlet 52, the liquid outlet channel 55, and the connecting groove 63 to prevent leakage at the connection position. The liquid inlet 51 and the liquid outlet 52 located on the same side of the same aluminum mold body 2 are a group.

[0028] The cooling mechanism 2 6 includes a connection port 61 and a circulation pipe 62. The connection ports 61 are respectively opened on the left and right sides of the two bases 1 opposite to the outer side. The circulation pipes 62 are respectively opened on the left and right sides of the two aluminum mold bodies 2 opposite to the outer side. The circulation pipes 62 are respectively connected to the adjacent connection ports 61 on the rear side. The cooling mechanism 2 6 also includes a connection groove 63. The connection groove 63 is respectively opened on the front side of the two aluminum mold bodies 2. The two circulation pipes 62 located on the same aluminum mold body 2 are connected through the connection groove 63. The two aluminum mold bodies 2 opposite to the outer side are provided with heat dissipation grooves 7. The heat dissipation grooves 7 are respectively located between the two circulation pipes 62 of the same aluminum mold body 2. Heat dissipation fins 10 are fixedly connected inside the heat dissipation grooves 7. The connection port 61 on the left is the injection port, and the connection port 61 on the right is the discharge port.

[0029] The thin plate insert mechanism 4 includes a thin plate 41, a blocking strip 42, a plug 43, and a rubber sealing ring 44. The thin plate 41 is fixedly connected to the front side of the aluminum mold body 2. The rear side of the thin plate 41 is provided with a blocking strip 42, which is inserted into the interior of the adjacent connecting groove 63 on the rear side. The rear side of the thin plate 41 is provided with evenly distributed plugs 43. The outer arc surface of the plugs 43 is movably fitted with rubber sealing rings 44. The plugs 43 are inserted into the interior of the adjacent liquid outlet channel 55 and liquid inlet channel 56. The outer surface of the rubber sealing ring 44 contacts the inner wall of the adjacent liquid outlet channel 55 and liquid inlet channel 56. The plugs 43 are inserted into the interior of the adjacent liquid outlet channel 55 and liquid inlet channel 56. The outer surface of the rubber sealing ring 44 contacts the inner wall of the adjacent liquid outlet channel 55 and liquid inlet channel 56. The blocking strip 42 is inserted into the interior of the adjacent connecting groove 63 on the rear side, thereby achieving sealing of the front side of the aluminum mold body 2.

[0030] The working principle of this utility model is as follows:

[0031] Install this BK hollow blow molding mold onto the blow molding equipment. Both ends of the two aluminum mold bodies 2 pass through the limiting posts to ensure that the two aluminum mold bodies 2 are precisely aligned when the mold is closed.

[0032] The thermoplastic is conveyed between two aluminum mold bodies 2. The blow molding equipment controls the two aluminum mold bodies 2 to close. The thermoplastic is sandwiched between the two aluminum mold bodies 2. Then the blow molding equipment blows up, the thermoplastic expands, and the air between the aluminum mold body 2 and the thermoplastic is squeezed. After passing through the exhaust insert 3, it enters the exhaust hole 8 and then collects in the exhaust through hole 9 to be discharged, avoiding air residue and improving the smoothness of the product.

[0033] The exhaust insert 3 is a breathable steel exhaust insert. Fluoroether sealing rings are provided at the positions of the liquid inlet 51, the liquid inlet channel 56, the liquid outlet 52, the liquid outlet channel 55, and the connecting groove 63 to prevent leakage at the connection position. The liquid inlet 51 and the liquid outlet 52 located on the same side of the same aluminum mold body 2 are a group. The coolant enters the liquid inlet channel 56 from the liquid inlet 51, and then enters the adjacent liquid outlet channels 55 on the left and right through the connecting channel 57 to achieve cooling and heat dissipation on the side of the aluminum mold body 2. The sealing bolt 1 53 seals the transition pipe 54, and the sealing bolt 2 58 seals the connecting channel 57 to prevent coolant leakage.

[0034] The left connection port 61 is the injection port, and the right connection port 61 is the discharge port. The coolant flows through the aluminum mold body 2 in sequence along the left connection port 61, the left circulation pipe 62, the connection groove 63, the right circulation pipe 62, and the right connection port 61, thereby achieving heat dissipation and cooling of the bottom wall of the aluminum mold body 2. At the same time, the heat dissipation groove 7 and the heat dissipation fin 10 increase the heat dissipation area of ​​the two opposite outer sides of the aluminum mold body 2 and improve the heat dissipation efficiency of the circulation pipe 62.

[0035] The plugs 43 are inserted into the interior of the adjacent liquid outlet channel 55 and liquid inlet channel 56 respectively. The outer surface of the rubber sealing ring 44 contacts the inner wall of the adjacent liquid outlet channel 55 and liquid inlet channel 56 respectively. The plug strips 42 are inserted into the interior of the adjacent connecting groove 63 on the rear side respectively, so as to achieve the sealing of the front side of the aluminum mold body 2.

[0036] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A BK hollow forming blow mold exhaust structure, characterized by: Includes a base (1), a first cooling mechanism (5), and a second cooling mechanism (6); Two bases (1) are provided, and the two bases (1) are symmetrically arranged. The front side of each base (1) is fixedly connected to an aluminum mold body (2). The left and right sides of the inner wall of the aluminum mold body (2) and the junction of the bottom wall are provided with exhaust holes (8) evenly distributed in front and back. Exhaust inserts (3) are inserted into the exhaust holes (8). Exhaust through holes (9) are provided on the left and right sides of the aluminum mold body (2). The exhaust through holes (9) are connected to the exhaust holes (8) located on the same side of the same aluminum mold body (2). The first cooling mechanism (5) is provided on the left and right sides of the aluminum mold body (2). The second cooling mechanism (6) is provided on the opposite outer ends of the two aluminum mold bodies (2). The front side of the aluminum mold body (2) is provided with a thin plate insert mechanism (4). The thin plate insert mechanism (4) is configured to cooperate with the first cooling mechanism (5) and the second cooling mechanism (6) located on the same aluminum mold body (2).

2. The exhaust structure of a BK hollow forming blow mold according to claim 1, characterized by: The cooling mechanism 1 (5) includes an inlet (51), an outlet (52), a transition pipe (54), an outlet channel (55), an inlet channel (56), and a connecting channel (57). The inlet (51) is located at the middle of the left and right ends of the two bases (1). The outlet (52) is provided on the left and right sides of the opposite inner ends of the two bases (1). The inlet channel (56) is provided in the middle of the left and right sides of the aluminum mold body (2). The outlet channel (55) is provided at the left and right ends of the opposite inner sides of the two aluminum mold bodies (2). The inlet channel (56) is connected to the inlet (51) adjacent to the rear side, and the outlet channel (55) is connected to the outlet (52) adjacent to the rear side through the transition pipe (54). The outlet channel (55) and the front side of the inlet channel (56) on the same left and right sides are connected through the connecting channel (57).

3. The exhaust structure of a BK hollow forming blow mold according to claim 2, characterized in that: The cooling mechanism 1 (5) further includes a sealing bolt 1 (53) and a sealing bolt 2 (58). The stud portion of the sealing bolt 2 (58) is threaded into the interior of the connecting channel (57), and the stud portion of the sealing bolt 1 (53) is threaded into the interior of the transition pipe (54).

4. The exhaust structure of a BK hollow forming blow mold according to claim 2, characterized by: The second cooling mechanism (6) includes a connection port (61) and a circulation pipe (62). The connection port (61) is opened on the left and right sides of the two bases (1) opposite to the outer side. The circulation pipe (62) is opened on the left and right sides of the two aluminum mold bodies (2) opposite to the outer side. The circulation pipe (62) is connected to the adjacent connection port (61) on the rear side.

5. The exhaust structure of a BK hollow forming blow mold according to claim 4, characterized by: The second cooling mechanism (6) also includes a connecting groove (63), which is opened on the front side of the two aluminum mold bodies (2). The two circulation pipes (62) located in the same aluminum mold body (2) are connected through the connecting groove (63).

6. The exhaust structure of a BK hollow forming blow mold according to claim 5, characterized by: The thin plate insert mechanism (4) includes a thin plate (41), a plug (42), a plug (43), and a rubber sealing ring (44). The thin plate (41) is fixedly connected to the front side of the aluminum mold body (2). The rear side of the thin plate (41) is provided with a plug (42). The plug (42) is inserted into the interior of the adjacent connecting groove (63) on the rear side. The rear side of the thin plate (41) is provided with uniformly distributed plugs (43). The outer arc surface of the plug (43) is movably fitted with a rubber sealing ring (44). The plugs (43) are inserted into the interior of the adjacent liquid outlet channel (55) and liquid inlet channel (56). The outer surface of the rubber sealing ring (44) is in contact with the inner wall of the adjacent liquid outlet channel (55) and liquid inlet channel (56).

7. The venting structure of a BK hollow blow molding die according to claim 4, characterized in that: The two aluminum mold bodies (2) are provided with heat dissipation grooves (7) on opposite outer sides. The heat dissipation grooves (7) are located between the two circulation pipes (62) of the same aluminum mold body (2). Heat dissipation fins (10) are fixedly connected inside the heat dissipation grooves (7).

Images