Inner mold piece for injection and blowing mold

Abstract

The utility model belongs to the field of injection and blowing molds, and can enable the distance between the accompanying water path and the inner mold cavity to be average everywhere, namely, the accompanying water path has the same cooling efficiency on different parts of the inner mold cavity, so that the molding quality of injection and blowing products is obviously improved, the use of cooling liquid is obviously reduced, and the cooling efficiency is improved. The utility model relates to an internal module for injection and blow molding, which can be made of materials with better strength, so that the internal module is not easy to damage in production and use, the production cycle of the internal module is shortened, and the maintenance work is reduced in the use of the internal module, and the internal module for injection and blow molding is provided with a cavity wall layer and a hollow heat dissipation structure. The cavity wall layer forms a surrounding thin wall of the inner die cavity, the cavity wall layer is provided with a blanking wall part and a cavity peripheral wall part, the hollowed-out heat dissipation mechanism is continuously formed on the outer surface of the cavity peripheral wall part, the accompanying water way penetrates through the hollowed-out part and is fixed by the hollowed-out part, and the accompanying water way is arranged on the blanking wall part and the cavity peripheral wall part in a veneering mode.

Description

Technical Field

[0001] This utility model belongs to the field of injection and blow molding, and specifically relates to an inner mold part used in injection and blow molding. Background Technology

[0002] Injection and blow molding are widely used in real life, such as for mineral water bottles, beverage bottles, laundry detergent bottles, etc., all of which use our injection and blow molding dies.

[0003] Note that the blow molding die has an inner mold component, which contains a constricted inner mold cavity and a water channel. The water channel is fitted onto the outside of the inner mold cavity to facilitate timely heat dissipation. To prevent leakage from the water channel, multiple intersecting pipes are drilled internally from a single solid structure without pipe joints or arbitrary connectors. The open ends of these multiple pipes are ultimately sealed with plugs, thus forming the water channel.

[0004] Currently, such as Figure 1 As shown, in order to better dissipate heat, the inner mold part is made of aluminum as the main material and has a material discharge port for material discharge. The water channel runs through the interior of the inner mold part for liquid cooling of the inner mold cavity. There are also inlet and outlet ports on the outside of the inner mold part for the coolant to flow in or out.

[0005] However, the above method has the following drawbacks: Since the drill bit cannot drill through curved channels, multiple pipes are all straight. Therefore, the distance between the accompanying water channels and the inner mold cavity is not uniform, resulting in different cooling efficiencies for different parts of the inner mold cavity. This not only affects the molding quality of injection-blown products but also leads to excessive coolant usage. Due to the poor cooling efficiency of the accompanying water channels, the material for the inner mold is limited to aluminum. Aluminum is relatively soft and has poor strength. On the one hand, the low strength of aluminum necessitates the design of thicker inner molds to ensure overall strength. On the other hand, the low strength of aluminum makes the inner molds prone to damage during production and use, resulting in a longer production cycle and requiring frequent maintenance. Furthermore, because aluminum is relatively soft, during the mold closing process, residual product material on the parting surface exerts external force on the inner mold surface, causing surface deformation. This leads to product material overflowing into the gaps formed by the deformation after mold closing, thus affecting the molding quality of the product. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an inner mold component for injection and blow molding, which ensures that the distance between the accompanying water channels and the inner mold cavity is uniform throughout, meaning that the accompanying water channels have the same cooling efficiency for different parts of the inner mold cavity. This significantly improves the molding quality of injection and blow molded products, and also significantly reduces the use of coolant. Furthermore, due to the improved cooling efficiency, it is possible to use materials with higher strength, making it less prone to damage during production and use. This not only shortens the production cycle of the inner mold component but also reduces maintenance work during its use.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An inner mold part for injection and blow molding has an inner mold cavity and a flowing water channel. The inner mold cavity has a blanking port. The part is characterized by further having: a cavity wall layer and a hollow heat dissipation structure. The cavity wall layer forms a thin wall surrounding the inner mold cavity. The cavity wall layer has a blanking wall portion and a cavity peripheral wall portion. The cavity peripheral wall portion transitions to the blanking port through the blanking wall portion. The hollow heat dissipation structure is continuously formed on the outer surface of the cavity peripheral wall portion. The hollow heat dissipation structure has multiple hollow portions, so that the hollow portions and the cavity peripheral wall portion form a recess into the inner mold cavity. The flowing water channel passes through the hollow portions and is fixed by the hollow portions. The flowing water channel is attached to the blanking wall portion and the cavity peripheral wall portion.

[0009] Preferably, the material discharge wall and the cavity peripheral wall form a bent transition section, and the accompanying water channel has a first curved section that fits against the transition section.

[0010] Furthermore, the accompanying water channel has a blanking wall adhesive section and a cavity peripheral wall adhesive section. The blanking wall adhesive section and the cavity peripheral wall adhesive section continuously form a closed contour. The blanking wall adhesive section is attached to the blanking wall part, and the cavity peripheral wall adhesive section is attached to the cavity peripheral wall part. The cavity peripheral wall adhesive section is in the shape of a snake extending circumferentially along the inner mold cavity.

[0011] Furthermore, this utility model also has a material cutting section opposite to the material dropping wall section, and the accompanying water channel also has a second curved section and a third curved section. The cavity peripheral wall section forms bends at both ends through the second curved section and the third curved section. The surface of the second curved section is disposed on the material dropping wall section, and the surface of the third curved section is disposed on the cavity peripheral wall section, and the third curved section is located near the material cutting section.

[0012] Furthermore, an inlet branch pipe and an outlet branch pipe are provided on the periphery wall of the cavity, and both the inlet branch pipe and the outlet branch pipe are located near the third bend.

[0013] Furthermore, there are two accompanying waterways, each corresponding to half of the cavity wall layer.

[0014] Preferably, the multiple hollow sections are distributed in a "honeycomb structure".

[0015] Furthermore, the opening of the hollowed-out section is diamond-shaped.

[0016] Preferably, the present invention also has a venting pipe located near the material discharge port and connected to the inner mold cavity.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Because the inner mold part for injection and blow molding of this utility model has a cavity wall layer and a hollow heat dissipation structure, the cavity wall layer forms a thin wall surrounding the inner mold cavity, the cavity wall layer has a blanking wall part and a cavity peripheral wall part, the hollow heat dissipation mechanism is continuously formed on the outer surface of the cavity peripheral wall part, the accompanying water channel passes through the hollow part and is fixed by the hollow part, and the accompanying water channel is attached to the blanking wall part and the cavity peripheral wall part. The accompanying water channel is formed by 3D printing, so it can achieve integral bending, that is, the accompanying water channel can be connected to the blanking wall part and the cavity peripheral wall part at all times, through the blanking wall part and the cavity peripheral wall part of the same thickness, and because the accompanying water channel has a better liquid cooling effect, the inner mold part can be made of a material with better strength, so even if the hollow heat dissipation structure is set, it can still achieve the desired effect. The thermal structure does not affect the structural strength, and the accompanying water channels receive better heat dissipation in the hollowed-out parts. Therefore, this utility model can make the distance between the accompanying water channels and the inner mold cavity uniform throughout, that is, the accompanying water channels have the same cooling efficiency for different parts of the inner mold cavity. This significantly improves the molding quality of injection and blow molding products, and also significantly reduces the use of coolant. Furthermore, due to the improved cooling efficiency, it is possible to use materials with better strength, so that damage is less likely to occur during production and use. This not only shortens the production cycle of the inner mold parts, but also reduces maintenance work during the use of the inner mold parts. Moreover, the 3D-made accompanying water channels also greatly shorten the production cycle of the inner mold parts.

[0019] 2. Because the accompanying water channel of this utility model has a blanking wall adhesive section and a cavity peripheral wall adhesive section, the blanking wall adhesive section and the cavity peripheral wall adhesive section continuously form a closed contour. The blanking wall adhesive section is attached to the blanking wall part, and the cavity peripheral wall adhesive section is attached to the cavity peripheral wall part. Moreover, the cavity peripheral wall adhesive section is in the shape of a serpentine extending circumferentially along the inner mold cavity. Therefore, the accompanying water channel of this utility model forms a larger heat dissipation contact area in the blanking wall adhesive section and the cavity peripheral wall adhesive section, so that the accompanying water channel has better cooling performance for the inner mold cavity.

[0020] 3. Because this utility model also has a material cutting section opposite to the material dropping wall, and the accompanying water channel also has a second curved section and a third curved section, the cavity peripheral wall section forms bends at both ends through the second curved section and the third curved section. The surface of the second curved section is set on the material dropping wall, and the surface of the third curved section is set on the cavity peripheral wall. Moreover, the third curved section is located near the material cutting section. The material cutting section is also made of a material with good rigidity. Therefore, under the premise of having a larger heat dissipation contact area, the material cutting section also maintains its shape under the influence of the overflow of product raw materials.

[0021] 4. Because the multiple hollow parts of this utility model are distributed in a "honeycomb structure", the honeycomb structure of this utility model has a better heat dissipation effect on the accompanying water channel.

[0022] 5. Because this utility model also has a venting pipe located near the material outlet and connected to the inner mold cavity, this utility model can quickly fill the inner mold cavity with gas through the venting pipe, achieving a better venting effect in the inner mold cavity. This makes it easier for the injection and blow molding products to quickly separate from the inner wall of the cavity wall layer, thereby further improving the production efficiency and product quality of the product. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the inner mold component;

[0024] Figure 2 This is a schematic diagram of an inner mold component for injection and blow molding according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A front view of the actual object;

[0026] Figure 4 This is a schematic diagram of the parting half of the inner mold for injection and blow molding according to an embodiment of the present invention.

[0027] Figure 5 for Figure 4 A front view of the actual object;

[0028] Figure 6 This is a schematic diagram illustrating the cooperation between the cavity wall layer and the accompanying water channel in an embodiment of this utility model;

[0029] Figure 7 for Figure 6 The front view.

[0030] In the figure: 100, inner mold part for injection and blow molding; 10, cavity wall layer; 10a, inner mold cavity; 10b, material outlet; 11, material outlet wall; 12, cavity peripheral wall; 20, accompanying water channel; 20a, material outlet wall section; 20b, cavity peripheral wall section; 20c, liquid inlet branch pipe; 20d, liquid outlet branch pipe; 21, first bend; 22, second bend; 23, third bend; 30, hollow heat dissipation structure; 30a, hollow section; 40, material cut-off section. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the inner mold part of this utility model for injection and blow molding. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.

[0032] like Figure 2 and Figure 3 As shown, the inner mold component 100 for injection and blow molding in this embodiment has a cavity wall layer 10 forming a thin wall surrounding the inner mold cavity 10a, a water channel 20, a hollow heat dissipation structure 30, a material cutting part 40, and a venting cylinder (not shown in the figure) communicating with the inner mold cavity 10a. The inner mold cavity 10a has a material discharge port 10b that opens to the outside. In this embodiment, the material of the inner mold component 100 for injection and blow molding is steel.

[0033] Specifically, the inner mold part 100 used for injection and blow molding is formed by two parting half molds (not shown in the figure) joined together by a parting surface (not shown in the figure). Each parting half mold has half of an inner mold cavity 10a. After the mold is closed, an inner mold part 100 with the entire inner mold cavity 10a is formed. After the injection and blow molded product is completed in the entire inner mold cavity 10a, the two parting half molds are separated and the product is taken out. The venting cylinder is used to fill the inner mold cavity 10a with gas after the injection and blow molded product is completed in the inner mold cavity 10a to achieve venting, so that the injection and blow molded product is separated from the inner surface of the inner mold cavity 10a.

[0034] Specifically, the cavity wall layer 10, the hollow heat dissipation structure 30, and the material cutting part 40 are integrated. The cavity wall layer 10 is a solid area adjacent to the inner mold cavity 10a. The hollow heat dissipation structure 30 is a structure formed on the outer surface of the cavity wall layer 10. The material cutting part 40 is a solid area formed at the bottom of the inner mold cavity 10a and opposite to the material drop port 10b.

[0035] like Figure 4 and Figure 5 As shown, the cavity wall layer 10 has a material discharge wall portion 11 and a cavity peripheral wall portion 12. The cavity peripheral wall portion 12 transitions to the material discharge port 10b through the material discharge wall portion 11, and the material discharge wall portion 11 and the cavity peripheral wall portion 12 form a bent transition portion (not shown in the figure).

[0036] Specifically, when the cavity wall layer 10 is regarded as a bottle structure, the material drop wall 11 is equivalent to the bottle shoulder, the cavity peripheral wall 12 is equivalent to the bottle body, the hollow heat dissipation structure 30 is equivalent to the outer surface of the bottle body formed along the mold closing direction, and the material cut-off part 40 is equivalent to the outer surface of the bottle bottom formed along the bottle height direction.

[0037] like Figure 6 and Figure 7 As shown, there are two accompanying water channels 20, each corresponding to half of the cavity wall layer 10. Specifically, each parting half corresponds to one accompanying water channel 20.

[0038] The accompanying water channel 20 has a material discharge wall-attaching section 20a, a cavity peripheral wall-attaching section 20b, an inlet branch pipe 20c, and an outlet branch pipe 20d.

[0039] The blanking wall section 20a and the cavity peripheral wall section 20b continuously form a closed contour.

[0040] The blanking wall section 20a is attached to the blanking wall portion 11, and the cavity peripheral wall section 20b is attached to the cavity peripheral wall portion 12. The cavity peripheral wall section 12 is in the shape of a snake extending circumferentially along the inner mold cavity 10a. The upper end of the cavity peripheral wall section 12 along the height direction of the inner mold cavity 10a is located on the outer surface of the blanking wall portion 11, and the lower end is located on the outer surface of the cavity peripheral wall portion 12.

[0041] The accompanying waterway 20 has multiple first curved sections 21 that fit against the transition section. The upper end of the cavity peripheral wall section 12 forms a second curved section 22 on the outer surface of the material drop wall section 11, and the lower end of the cavity peripheral wall section 12 forms a third curved section 23 on the outer surface of the cavity peripheral wall section 12. The material drop wall section 20a is continuous with the cavity peripheral wall section 20b through two first curved sections 21. The serpentine cavity peripheral wall section 20b is bent at both ends through the second curved section 22 and the third curved section 23, and the third curved section 23 is located near the material cut-off section 40.

[0042] Both the inlet branch pipe 20c and the outlet branch pipe 20d are formed on the cavity peripheral wall patch 20b, and both the inlet branch pipe 20c and the outlet branch pipe 20d are located near the third bend 23. In this embodiment, the inlet branch pipe 20c and the outlet branch pipe 20d are located at both ends of the cavity peripheral wall patch 20b along the circumferential direction of the inner mold cavity 10a.

[0043] The hollow heat dissipation mechanism 30 is continuously formed on the outer surface of the cavity peripheral wall portion 12. The hollow heat dissipation mechanism 30 has multiple hollow portions 30a, so that the hollow portions 30a and the cavity peripheral wall portion 12 form a recess into the inner mold cavity 10a. The accompanying water channel 20 passes through the hollow portions 30a and is fixed by the hollow portions 30a.

[0044] The opening of the hollow section 30a is diamond-shaped, and multiple hollow sections 30a are distributed in a "honeycomb structure". Specifically, the solid of the hollow heat dissipation mechanism 30 is a thin-walled heat dissipation fin, and the heat dissipation fin is divided to form the hollow section 30a. The accompanying water channel 20 is exposed in the hollow section 30a.

[0045] The material cutting section 40 and the material dropping wall section 11 are opposite each other along the height direction of the inner mold cavity 10a.

[0046] The venting cylinder is connected to the inner mold cavity through a venting pipe. The venting pipe is located near the material discharge port 10b. One end of the venting pipe is connected to the venting cylinder, and the other end is connected to the inner mold cavity 10a.

[0047] The above embodiments are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.

Claims

1. An inner mold component for injection and blow molding, comprising an inner mold cavity and a flowing water channel, wherein the inner mold cavity has a discharge port, characterized in that, It also has: Cavity wall layer and hollow heat dissipation structure, The cavity wall layer forms the enclosing thin wall of the inner mold cavity. The cavity wall layer has a blanking wall portion and a cavity peripheral wall portion, and the cavity peripheral wall portion transitions to the blanking port through the blanking wall portion. The hollow heat dissipation structure is continuously formed on the outer surface of the cavity peripheral wall. The hollow heat dissipation structure has multiple hollow parts, so that the hollow parts and the cavity peripheral wall form a recess into the inner mold cavity. The accompanying water channel passes through the hollow parts and is fixed by the hollow parts. The accompanying water channel is attached to the blanking wall and the cavity peripheral wall.

2. The inner mold component for injection and blow molding according to claim 1, characterized in that: in, The material discharge wall and the cavity peripheral wall form a bent transition section, and the accompanying water channel has a first curved section that fits against the transition section.

3. The inner mold component for injection and blow molding according to claim 2, characterized in that: in, The accompanying waterway has a material discharge wall section and a cavity peripheral wall section, which continuously form a closed contour. The blanking wall section is attached to the blanking wall portion, and the cavity peripheral wall section is attached to the cavity peripheral wall portion, and the cavity peripheral wall section is in the shape of a serpentine extending circumferentially along the inner mold cavity.

4. The inner mold component for injection and blow molding according to claim 3, characterized in that, It also has: The material cutting section opposite to the material dropping wall section. The accompanying waterway also has a second bend and a third bend. The cavity peripheral wall section is bent at both ends by the second bending portion and the third bending portion. The second curved portion is attached to the material dropping wall portion, and the third curved portion is attached to the cavity peripheral wall portion, with the third curved portion located near the material cutting portion.

5. The inner mold component for injection and blow molding according to claim 4, characterized in that: in, The cavity periphery wall is provided with an inlet branch pipe and an outlet branch pipe, and both the inlet branch pipe and the outlet branch pipe are located near the third bend.

6. The inner mold component for injection and blow molding according to any one of claims 3 to 5, characterized in that: in, There are two accompanying water channels, each corresponding to half of the cavity wall layer.

7. The inner mold component for injection and blow molding according to claim 1, characterized in that: in, The multiple hollow sections are distributed in a "honeycomb structure".

8. The inner mold component for injection and blow molding according to claim 7, characterized in that: in, The opening of the hollowed-out section is diamond-shaped.

9. The inner mold component for injection and blow molding according to claim 1, characterized in that, It also has: A venting pipe is located near the material discharge port and is connected to the inner mold cavity.

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