A forming component and a parison mould

Abstract

A forming component includes a cavity structure. The cavity structure has a cavity that defines at least a partial side forming surface of a blank and a cavity bottom that defines at least a bottom forming surface of the blank. A cooling flow channel for cooling the corresponding forming surface of the blank and a cooling channel are respectively provided in the cavity and the cavity bottom; a transition cooling channel and a diversion structure for circulating the cooling fluid through the transition cooling channel are provided between the cavity and the cavity bottom. The cooling flow channel, the transition cooling channel, the diversion structure, and the cooling channel are sequentially connected. By providing a transition cooling channel and a diversion structure for blocking the cooling fluid to enable the cooling fluid to fully flow through the transition cooling channel between the cavity and the cavity bottom, due to the blocking effect of the diversion structure on the cooling fluid, after the cooling fluid fully flows through the transition cooling channel, it enters the cooling channel through the diversion structure, ensuring the cooling uniformity and cooling effect of the forming surface corresponding to the transition cooling channel.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a molding component and an injection mold. Background Art

[0002] In the existing mold cavity structure, the cooling fluid flowing out of the water outlet of the cavity is separated by the transition cooling channel and then enters the water inlet at the bottom of the cavity after passing through the transition cooling channel. Since the water outlet of the cavity and the water inlet hole at the bottom of the cavity are offset at a small angle in the circumferential direction, the cooling fluid flowing out of the water outlet of the cavity directly enters the water inlet hole at the bottom of the cavity after entering the transition cooling channel, and the cooling fluid fails to circulate through the transition cooling channels on both sides of the water outlet of the cavity before entering the water inlet hole at the bottom of the cavity. As a result, very little cooling fluid flows through the transition cooling channel facing away from the water inlet hole, and most of the transition cooling channels lack cooling or have poor cooling effects, causing the blank corresponding to the transition cooling channel to have problems of uneven cooling and poor cooling effects. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a molding component and an injection mold.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A molding component includes a mold cavity structure, the mold cavity structure has a cavity that defines at least part of the side molding surface of a blank and a cavity bottom that defines at least the bottom molding surface of the blank, the cavity and the cavity bottom are respectively provided with a cooling flow channel and a cooling channel for cooling the corresponding molding surface of the blank; a transition cooling channel and a guide structure for allowing a cooling fluid to circulate through the transition cooling channel are provided between the cavity and the cavity bottom, and the cooling flow channel, the transition cooling channel, the guide structure and the cooling channel are connected in sequence.

[0006] In the present invention, the guide structure includes a recessed position, a connecting hole and a spacer. The recessed position is formed by the outer peripheral surface of the cavity bottom part extending radially inward. The connecting hole is arranged at the bottom of the recessed position. The connecting hole extends radially and is connected with the cooling channel. The connecting hole is arranged close to one side of the recessed position, and the spacer at least blocks part of the connecting hole in the circumferential direction.

[0007] In the present invention, the circumferential length of the recessed portion is greater than its axial length.

[0008] In the present invention, the circumferential free end of the spacer is spaced apart from the side wall of the recessed position to form a guide groove, and the guide groove serves as a communication port for the cooling fluid to enter the recessed position from the transition cooling channel.

[0009] In the present invention, the spacer is disposed on the cavity bottom, extends circumferentially from a side of the recess near the communication hole, and the spacer and the cavity bottom are of an integral structure.

[0010] In the present invention, the spacer is disposed on the cavity bottom, the spacer is an independent component, one end of the spacer extends circumferentially from a side of the recess near the communication hole, and the other end of the spacer extends along the side wall of the recess.

[0011] In the present invention, the spacer further covers the bottom of the recess.

[0012] In the present invention, a fluid inlet is provided at one end of the cooling flow channel away from the cooling channel, and a fluid outlet is provided at one end of the cooling flow channel near the cooling channel.

[0013] In the present invention, the spacer is disposed in the cavity body, the spacer is formed by extending from a reinforcing rib at the fluid outlet of the cavity body towards the cavity bottom, and a receiving groove is provided at a position of the cavity bottom corresponding to the recess for receiving the spacer when the cavity bottom is installed reversely.

[0014] Based on the above-provided forming assembly, the present invention further provides a preform mold, including a plurality of core structures and the above-mentioned cavity structure, the core structures and the cavity structure correspond to each other one by one, and the core structures and the cavity structure are configured to define at least part of the forming cavity.

[0015] The beneficial effects of the present invention are as follows: By providing a transition cooling channel between the cavity body and the cavity bottom and a diversion structure for blocking the cooling fluid to enable the cooling fluid to fully flow through the transition cooling channel, due to the blocking effect of the diversion structure on the cooling fluid, after the cooling fluid fully flows through the transition cooling channel, it enters the cooling channel through the diversion structure, ensuring the cooling uniformity and cooling effect of the forming surface corresponding to the transition cooling channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments:

[0017] Figure 1 is a schematic structural diagram of one embodiment of the preform mold of this embodiment;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the cavity bottom in

[0019] Figure 3 is a schematic structural diagram of the cavity bottom in the second embodiment of this embodiment;

[0020] Figure 4 is Figure 3 a cross-sectional view taken along section A-A in

[0021] Figure 5 For Figure 3 A sectional view taken along the middle section B-B;

[0022] Figure 6 A schematic structural view of an injection-blow mold in the third implementation manner of this embodiment;

[0023] Figure 7 For Figure 6 A sectional view taken along the middle section C-C. Specific implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] Embodiment:

[0026] As Figures 1 to 7 shown, this embodiment discloses a molding assembly, including a cavity structure. The cavity structure has a cavity 1 that defines at least a partial side forming surface of a preform and a cavity bottom 2 that defines at least a bottom forming surface of the preform. The cavity 1 and the cavity bottom 2 are respectively provided with cooling channels 11 and cooling channels 21 for cooling the corresponding forming surfaces of the preform. One end of the cooling channel 11 away from the cooling channel 21 is provided with a fluid inlet, and one end of the cooling channel 11 near the cooling channel 21 is provided with a fluid outlet 12; a transition cooling channel 3 and a guiding structure 4 for circulating a cooling fluid through the transition cooling channel 3 are provided between the cavity 1 and the cavity bottom 2, and the cooling channel 11, the transition cooling channel 3, the guiding structure 4, and the cooling channel 21 are connected in sequence. In practical applications, the cooling fluid enters the cooling channel 11, and then enters the transition cooling channel 3. Under the blocking action of the guiding structure 4, the cooling fluid fully flows through the transition cooling channel 3, and then enters the cooling channel 21 through the guiding structure 4. It is avoided that after the cooling fluid enters the transition cooling channel 3 from the cooling channel 11, the cooling fluid directly enters the cooling channel 21 without flowing through the entire transition cooling channel 3, resulting in uneven cooling and poor cooling effect on the corresponding forming surface of the transition cooling channel 3.

[0027] In this embodiment, the diversion structure 4 includes a recess 41, a communication hole 42, and a spacer 43. The recess 41 is formed by radially inward extension of a part of the outer peripheral surface of the cavity bottom 2. In order to improve the rationality of the structure of the recess 41 and enable the cooling fluid to flow fully within the recess 41, the recess 41 preferably has a circumferential length greater than the axial length, and the circumferential length of the recess 41 is 1.5 - 2.5 times the axial length. Among them, the axial length of the recess 41 is related to the position of the cooling channel 21, and the position of the cooling channel 21 is related to the axial length of the cavity bottom forming surface in the cavity bottom 2. Then, the circumferential length of the recess 41 is determined through the axial length of the recess 41. At this time, the cooling fluid flowing through the recess 41 can cool the corresponding circumferentially surrounding part of the cavity bottom 2. By designing this correlation, the cooling requirements of the cavity bottom forming surfaces with different axial lengths can be reasonably configured, and the cavity bottom 2 can be fully cooled. The communication hole 42 is provided at the bottom of the recess 41. The communication hole 42 extends radially and communicates with the cooling channel 21. Preferably, the communication hole 42 is arranged close to one side of the recess 41, which can enable the cooling fluid in the recess 41 to completely flow through the recess 41 before entering the communication hole 42, avoiding cooling blind spots in the recess 41. The spacer 43 blocks at least part of the communication hole 42 in the circumferential direction. The spacer 43 is located at the circumferential position of the cavity bottom 2. The circumferential free end of the spacer 43 is spaced from the side wall of the recess 41 to form a guide groove 44, so that at least part of the cooling fluid enters the recess 41 through the guide groove 44 and then flows countercurrently in the circumferential direction into the communication hole 42. The guide groove 44 serves as the communication port for the cooling fluid to enter the recess 41 from the transition cooling channel 3.

[0028] As a preferred embodiment, the spacer 43 completely blocks the communication hole 42 in the circumferential direction, so that all the cooling fluid flows countercurrently in the circumferential direction into the communication hole 42 after entering the recess 41 through the guide groove 44, ensuring the uniformity and cooling effect of the cooling of the cavity bottom 2.

[0029] As a preferred embodiment, while the communication hole 42 is arranged close to one side of the recess 41, one side wall of the spacer 43 close to the recess 41 extends towards the other side wall, so that the guide groove 44 is formed on the side away from the communication hole 42. After the cooling fluid enters the recess 41 from the guide groove 44, it can completely flow through the recess 41 before entering the communication hole 42.

[0030] As a preferred embodiment, there are various specific implementation manners of the spacer 43:

[0031] 1. The spacer 43 is arranged on the cavity bottom 2 and extends circumferentially from the side of the recess 41 close to the communication hole 42. The spacer 43 and the cavity bottom 2 are of an integral structure.

[0032] 2. The spacer portion 43 is disposed on the cavity bottom 2. The spacer portion 43 is an independent component. One end of the spacer portion 43 extends circumferentially along one side of the recess 41 near the communication hole 42, and the other end of the spacer portion 43 extends along the side wall of the recess 41. Of course, in this embodiment, the spacer portion 43 may also cover the bottom of the recess 41, increasing the contact area between the spacer portion 43 and the recess 41, so that the spacer portion 43 is firmly fixed to the cavity bottom 2. When the spacer portion 43 is fixed, since the cooling channels 21 are arranged on the cavity bottom 2, the wall thickness position may be insufficient. When screw fixation cannot be used, welding is preferably used for fixation, or other structures can be combined for installation by means of inlaying, interference fit fixation, etc.

[0033] 3. The spacer portion 43 is disposed in the cavity 1. The spacer portion 43 is formed by extending from the reinforcing rib 13 at the outlet 12 of the cavity 1 towards the cavity bottom 2. At this time, a receiving groove is provided at the position of the cavity bottom 2 corresponding to the recess 41 for receiving the spacer portion 43 when the cavity bottom 2 is installed in the reverse direction.

[0034] When the cavity 1 and the cavity bottom 2 adopt a split structure, the outer side wall of the cavity 1 is provided with a reinforcing rib 13; a cooling flow channel 11 is formed between the outer side wall of the cavity 1 and the reinforcing rib 13. The cavity 1 includes a cavity flange 14 protruding outward from the end face of the outlet 12. The cavity bottom 2 is installed at the end of the cavity 1. The end face of the cavity bottom 2 corresponding to the cavity bottom forming surface is the first end face 22. A cavity bottom flange 23 is provided on the first end face 22. The cavity bottom flange 23 abuts against the cavity flange 14. A transition cooling channel 3 is formed between the first end face 22, the cavity bottom flange 23, the cavity flange 14 and the annular section at the end of the reinforcing rib 13.

[0035] When the cavity 1 and the cavity bottom 2 adopt an integral structure, the outer side wall of the cavity 1 is provided with a reinforcing rib 13; a cooling flow channel 11 is formed between the outer side wall of the cavity 1 and the reinforcing rib 13. A transition cooling channel 3 is provided between the cavity 1 and the cavity bottom 2. The structure of this transition cooling channel 3 is similar to the structure of the above-mentioned transition cooling channel 3.

[0036] Based on a forming assembly disclosed in the above embodiments, this embodiment also discloses a preform mold, including a plurality of core structures and cavity structures corresponding to the core structures one by one. The core structures and the cavity structures are configured to define at least part of the forming cavity.

[0037] As a preferred embodiment, the preform mold further includes a cavity plate. The cavity plate is provided with mounting holes, cooling inlet holes and cooling outlet holes corresponding to the cavity structures. The cavity structures are installed in the mounting holes, and the inlet and the outlet hole of the cavity bottom 2 are directly or indirectly communicated with the cooling inlet hole and the cooling outlet hole respectively. During implementation, the hole wall of the mounting hole closes the outer periphery of the cooling flow channel and the transition cooling channel, forming a closed structure on the outside of the cooling flow channel and the transition cooling channel.

[0038] The above are only the preferred embodiments of the present invention, and all technical solutions that achieve the purpose of the present invention by substantially the same means fall within the protection scope of the present invention.

Claims

1. A forming component, characterized in that: it includes a cavity structure, the cavity structure has a cavity defining at least part of the side forming surface of the blank and a cavity bottom defining at least the bottom forming surface of the blank, and a cooling flow channel and a cooling channel for cooling the corresponding forming surfaces of the blank are respectively provided in the cavity and the cavity bottom; a transition cooling channel and a diversion structure for circulating the cooling fluid through the transition cooling channel are provided between the cavity and the cavity bottom, and the cooling flow channel, the transition cooling channel, the diversion structure and the cooling channel are sequentially connected; the diversion structure includes a recess, a communication hole and a spacer, the recess is formed by the outer peripheral surface of part of the cavity bottom extending radially inwards, the communication hole is provided at the bottom of the recess, the communication hole extends radially and communicates with the cooling channel, the communication hole is arranged on the side close to the recess, and the spacer at least blocks part of the communication hole in the circumferential direction.

2. A forming component according to claim 1, characterized in that: the circumferential length of the recess is greater than the axial length.

3. A forming component according to claim 1, characterized in that: a guide groove is formed by the circumferential free end of the spacer being spaced from the side wall of the recess, and the guide groove serves as a communication port for the cooling fluid to enter the recess from the transition cooling channel.

4. A forming component according to claim 1, characterized in that: the spacer is arranged on the cavity bottom, extends circumferentially from the side close to the communication hole of the recess, and the spacer and the cavity bottom are of an integral structure.

5. A forming component according to claim 1, characterized in that: the spacer is arranged on the cavity bottom, the spacer is an independent component, one end of the spacer extends circumferentially from the side close to the communication hole of the recess, and the other end of the spacer extends along the side wall of the recess.

6. A forming component according to claim 5, characterized in that: the spacer also covers the bottom of the recess.

7. A forming component according to claim 1, characterized in that: a fluid inlet is provided at one end of the cooling flow channel away from the cooling channel, and a fluid outlet is provided at one end of the cooling flow channel close to the cooling channel.

8. A forming component according to claim 7, characterized in that: the spacer is arranged in the cavity, the spacer is formed by a reinforcing rib at the fluid outlet of the cavity extending towards the cavity bottom, and a receiving groove is arranged at the position of the cavity bottom corresponding to the recess for receiving the spacer when the cavity bottom is installed in reverse.

9. A blank injection mold, characterized in that: it includes a plurality of core structures and the cavity structure of the forming component according to any one of claims 1-8, the core structures correspond to the cavity structures one by one, and the core structures and the cavity structures are configured to define at least part of the forming cavity.

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