Decompression bottom die of bottle blowing die

Abstract

The utility model discloses a decompression bottom die of a bottle blowing die, which comprises an outer die sleeve, petal body structures annularly arranged in the outer die sleeve at equal intervals and a central boss arranged at the inner bottom of the outer die sleeve, bottle bottom forming cavities are arranged among the petal body structures, and a plurality of groups of bottom exhaust holes are arranged at the inner bottom of each bottle bottom forming cavity. A plurality of groups of side exhaust holes are formed in the outer die sleeve on the inner side surface of the bottle bottom forming cavity; a bottom plate is arranged at the bottom of the outer die sleeve, a bottom die base is arranged at the bottom of the bottom plate, a plurality of groups of flow guide exhaust holes are formed in the side face of the bottom plate, the flow guide exhaust holes are communicated with bottom exhaust holes, and the flow guide exhaust holes and the bottom exhaust holes are arranged in an inclined included angle mode. The air circulation efficiency is improved, the situation that bubbles or deformation exists in the bottle bottom forming process due to unsmooth air circulation is avoided, and the percent of pass of bottle body forming is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of bottle blowing moulds, and particularly relates to a decompression bottom mould of a bottle blowing mould. Background Art

[0002] Plastic bottles are formed using blow molding molds. The mold cavity, formed by the two side cavities and the base mold, determines the shape of the bottle. The shape and machining accuracy of the base mold directly impact the bottle's appearance and quality, determining whether the bottle formed with this mold can maintain its stability.

[0003] For example, the claw-flap bottle bottom structure, bottle, bottom mold and bottle blowing mold disclosed in the utility model with authorization announcement number CN216233459U include a central boss, five claws arranged around the periphery of the central boss and grooves arranged between adjacent claws. By setting the top of the groove as an inclined plane structure, the distance from the bottle mouth to the groove forming surface is shortened compared with the traditional curved surface structure, thereby reducing the requirement for bottle blowing pressure, and the inclined plane structural design is adopted to form a square rib structure of the groove on the bottom of the bottle, which has better pressure resistance, improves the mechanical properties of the bottom of the bottle, and lays the foundation for the lightweight design of the bottom of the bottle; the angle between the first busbar and the second busbar or the corresponding extension line is also set. The angle is set within the range of 50°-80°, so that the expansion of both sides of the groove is increased, the claw-type opening angle is increased, and the area of ​​the bottom contact surface is reduced, that is, the area of ​​the bottle bottom with the longest blowing distance and the greatest difficulty is reduced, so that the difficulty of bottle bottom blow molding is reduced, thereby reducing the requirement for bottle blowing pressure and being able to adapt to low-pressure bottle blowing. However, the above technical solution has the following problems: when the bottom mold of the above solution is vented, it cannot quickly exhaust the airflow on the bottom molding surface and the side of the bottom molding surface, and the overall exhaust effect is poor, which affects the molding effect of the bottle bottom, easily causes unqualified bottles, and reduces the qualified rate of molded bottles. For this reason, we propose a decompression bottom mold for bottle blowing molds. Utility Model Content

[0004] The purpose of the utility model is to provide a decompression bottom mold for a bottle blowing mold, so as to solve the problem in the prior art proposed in the above background technology that the bottom mold of the bottle blowing mold cannot quickly exhaust the airflow on the bottom molding surface and the side of the bottom molding surface when venting, resulting in poor overall exhaust effect, affecting the molding effect of the bottom of the bottle body, easily resulting in unqualified bottles, and reducing the qualified rate of the molded bottles.

[0005] To achieve the above object, the utility model provides the following technical scheme: a decompression bottom die of bottle mould, including outer die cover, petal body structure that is annular equidistance is arranged in the outer die cover and the center boss that sets up in the bottom of outer die cover, all be provided with bottle bottom forming cavity between petal body structure, the bottom of bottle bottom forming cavity is provided with a plurality of groups of bottom exhaust hole, the outer die cover on the inboard of bottle bottom forming cavity is provided with a plurality of groups of side exhaust hole;

[0006] Wherein, the bottom of the outer die cover is provided with a bottom disc, and the bottom of the bottom disc is provided with a bottom die seat.

[0007] In an embodiment: the bottom disc side is provided with a plurality of groups of flow guide exhaust holes, which can quickly exhaust the air in the bottom of the bottle bottom forming cavity.

[0008] In an embodiment: the flow guide exhaust hole is communicated with the bottom exhaust hole, and the flow guide exhaust hole and the bottom exhaust hole are arranged at an inclined angle, which can quickly guide the air in the bottom of the bottle bottom forming cavity into the flow guide exhaust hole.

[0009] In an embodiment: the inclined angle is 45°-90°, and the arrangement of the inclination angle facilitates the air flow guide and improves the air flow rate.

[0010] In an embodiment: the outer die cover, the bottom disc and the bottom die seat are integrally formed, which improves the overall mechanical properties of the bottom die and facilitates the manufacturing thereof.

[0011] In an embodiment: the bottom of the bottom die seat is provided with a groove.

[0012] In an embodiment: a cooling water channel is arranged in the groove, and the cooling water channel has a spiral cross section, which can guide the cooling water and cool the bottom die.

[0013] In an embodiment: the cooling water channel gradually increases from the outer ring depth dimension to the inner ring depth dimension, which can make the cooling water flow from the outside to the center of the bottom die at a reduced speed, thereby improving the cooling effect of the bottom die.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model can quickly exhaust the air in the bottom and the side of the bottle bottom forming cavity, improve the air circulation efficiency, avoid poor air circulation, cause the bubble or deformation in the bottle bottom forming process, and guarantee the qualified rate of bottle body forming. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the first visual angle in the utility model;

[0017] Figure 2It is the structure schematic view of the second visual angle in the utility model;

[0018] Figure 3 It is the structure schematic view of the third visual angle in the utility model;

[0019] Figure 4 It is the structure schematic view of the fourth visual angle in the utility model; Figure 3 It is the sectional structure schematic view of A-A in the utility model;

[0020] Figure 5 It is the structure schematic view of the fourth visual angle in the utility model; Figure 4 It is the local enlarged structure schematic view of B part in the utility model;

[0021] Figure 6 It is the structure schematic view of the fourth visual angle in the utility model;

[0022] In the drawing, 1 is an outer mold cover, 2 is a petal body structure, 3 is a flow guide exhaust hole, 4 is a bottom disc, 5 is a bottom mold base, 6 is a side exhaust hole, 7 is a forming cavity, 8 is a bottom exhaust hole, 9 is a groove body, and 10 is a cooling water channel. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Embodiment one

[0025] Please refer to Figures 1-5 The utility model provides a kind of technical solutions: a kind of bottle blowing mould's pressure relief bottom mould, including outer mold cover 1, the petal body structure 2 being annularly equidistantly arranged in outer mold cover 1 and the center boss being arranged at bottom in outer mold cover 1, specifically, outer mold cover 1 is the cylindrical structure of wide upper narrow lower, can guarantee the circular arc when bottle body is formed, bottle bottom forming cavity 7 is arranged between petal body structure 2, multiple groups of bottom exhaust hole 8 are arranged in the bottom of bottle bottom forming cavity 7, multiple groups of side exhaust hole 6 are arranged on the inner side of bottle bottom forming cavity 7 outer mold cover 1, bottom disc 4 is arranged on the bottom of outer mold cover 1, bottom disc 4 bottom sets up bottom mold base 5, multiple groups of flow guide exhaust hole 3 are arranged on the side of bottom disc 4, can carry out the air in the bottom of bottle bottom forming cavity 7 quickly discharge, flow guide exhaust hole 3 is communicated with bottom exhaust hole 8, and flow guide exhaust hole 3 and bottom exhaust hole 8 are arranged with inclined angle, can quickly flow guide the air in the bottom of bottle bottom forming cavity 7 to flow guide exhaust hole 3.

[0026] When the molding material is injected into the outer sleeve 1, under the action of air pressure, the air in the outer sleeve 1 is quickly discharged through the side exhaust hole 6, and the air at the bottom of the bottle body forming cavity 7 is transported to the guide exhaust hole 3, and the guide exhaust hole 3 quickly discharges the air at the bottom of the bottle body forming cavity 7. When the bottle body bottom is formed, the situation that bubbles or deformation occurs in the bottle body bottom forming is effectively avoided, the bottle body bottom forming quality is guaranteed, and the bottle body finished product qualification rate is improved.

[0027] Further: the inclination angle is 45°-90°, the arrangement of the inclination angle facilitates the air guiding, and the air flow rate is improved.

[0028] Further: the outer sleeve 1, the bottom disc 4 and the bottom die seat 5 are integrally formed, the overall mechanical properties of the bottom die are improved, and the manufacturing thereof is facilitated.

[0029] As a specific embodiment of the present application, please refer to Figure 4 and Figure 6 The bottom die seat 5 is provided with a groove 9 at the bottom, and the cooling water channel 10 is arranged in the groove 9. The cooling water channel 10 is spiral in cross section, can guide the cooling water and cool the bottom die, and gradually increases from the outer ring depth dimension to the inner ring depth dimension, so that the cooling water flows from the outside to the center of the bottom die at a reduced speed, thereby improving the cooling effect of the bottom die.

[0030] When the bottle body is formed, the cooling water is input through the cooling water channel 10. Since the cooling water channel 10 gradually increases from the outer ring depth dimension to the inner ring depth dimension, the flow rate of the cooling water is gradually reduced. With the reduction of the flow rate of the cooling water, the bottom die can be cooled, and the cooling efficiency is improved.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressure relief bottom mould for bottle moulds, comprising an outer sleeve (1), a petal structure (2) arranged equidistantly in a ring in the outer sleeve (1), and a central boss arranged in the bottom of the outer sleeve (1), characterised in that: The bottom of the bottle forming cavity (7) is provided with a plurality of groups of bottom exhaust holes (8), and the outer mold sleeve (1) on the inner side of the bottle forming cavity (7) is provided with a plurality of groups of side exhaust holes (6). The bottom of the bottom disc (4) is provided with a bottom die seat (5).

2. A pressure relief base of a bottle blowing mold according to claim 1, characterized in that: The bottom disc (4) is provided with a plurality of groups of flow guide exhaust holes (3) on the side.

3. A pressure relief base of a bottle blowing mold according to claim 2, characterized in that: The flow guide exhaust hole (3) is communicated with the bottom exhaust hole (8), and the flow guide exhaust hole (3) and the bottom exhaust hole (8) are arranged at an inclined angle.

4. A pressure relief base of a bottle blowing mold according to claim 3, characterized in that: The inclined angle is 45°-90°.

5. A pressure relief base of a bottle blowing mold according to claim 1, characterized in that: The outer mold sleeve (1), the bottom disc (4) and the bottom die seat (5) are integrally formed.

6. A pressure relief base of a bottle blowing mold according to claim 1, characterized in that: The bottom of the bottom die seat (5) is provided with a groove (9).

7. A pressure relief base for a bottle mould according to claim 6, characterised in that: The cooling water channel (10) is provided in the groove (9), and the cross section of the cooling water channel (10) is spiral.

8. A pressure relief base of a bottle blowing mold according to claim 7, characterized in that: The cooling water channel (10) gradually increases from the outer ring depth dimension to the inner ring depth dimension.

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