Die cavity with uniform and efficient cooling function

Abstract

A uniform and efficient cooling die cavity comprises a die body, a forming cavity is formed in the die body, a cooling water tank for a cooling medium to flow is arranged on the outer surface of the die body, and the cooling water tank comprises a water inlet tank, a flow dividing water tank and at least one group of circulation water tanks; a cooling medium flows into the cooling water tank of the die cavity from the water inlet, flows into the flow dividing water tank from the water inlet tank, is divided in the flow dividing water tank in the circumferential direction, is converged in the flow dividing water tank, then enters the first circulation water tank and is divided in the circumferential direction again, two branches are formed, enter the second circulation water tank, and finally flow out after being converged from the water outlet. In other words, a cooling medium flows between the water inlet and the water outlet in the flow process of flow dividing, flow converging, flow dividing and flow converging, a two-way synchronous flowing cooling water way structure is adopted between the water inlet position and the water outlet position, it is guaranteed that circumferential cooling is uniform, meanwhile, the cooling efficiency of the die cavity is improved, and the difference of the cooling effect in the circumferential direction is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of preform injection molds, relates to a mold cavity used for forming a preform body of a bottle preform in the preform injection mold, and specifically relates to a mold cavity with uniform and efficient cooling. Background Art

[0002] During the preform injection molding process, the efficiency and quality of preform injection molding are closely related to the cooling water channel structure on the outer side of the mold cavity. In order to improve the uniformity of mold cavity cooling, the applicant has previously developed and applied for a patent technology for a mold cavity cooling water channel structure, and its patent authorization announcement number is CN214645124U, and its name is a mold cavity cooling water channel structure that keeps the water trough outlet at a specific position. The mold cavity cooling water channel structure adjusts the water inlet and outlet through the design of the water inlet level structure, so that the water inlet and the water outlet are in the same position, and then through the ingenious structural design, the outlet position of the cooling water trough can always be maintained at a specific position. The cooling liquid flows along two circular arc paths of similar length in a circle of water troughs at the junction of the mold cavity and the bottom of the mold cavity, thereby improving the uniformity of circumferential cooling of the circle of water troughs; through the stepped reverse circulation water channel structure, the cooling liquid flows in opposite directions between adjacent cooling water troughs, and the cross-sectional width and length of each cooling water trough are nearly equal, thereby improving the uniformity of axial cooling.

[0003] For the above-mentioned types of mold cavity cooling water trough structures, a unidirectional flow water channel structure is generally used between the water inlet and outlet positions, which has the disadvantages of low cooling efficiency of the mold cavity and possible differences in cooling effects in the circumferential direction. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a mold cavity with uniform and efficient cooling.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A mold cavity with uniform and efficient cooling, comprising a mold body, a molding cavity is arranged in the mold body, a cooling water groove for cooling medium to flow is arranged on the outer surface of the mold body, and the cooling water groove comprises a water inlet groove, a diversion water groove and at least one group of circulating water grooves;

[0007] The diversion water trough is circumferentially surrounded, one end of the water inlet trough is provided with a water inlet, and the other end extends axially and communicates with one circumferential side of the diversion water trough;

[0008] A group of the circulating water troughs includes a first circulating water trough and a second circulating water trough surrounding in the circumferential direction;

[0009] The other circumferential side of the diversion water trough is connected to the middle of the first circulation water trough;

[0010] The two ends of the first circulating water tank are respectively connected to the two ends of the second circulating water tank;

[0011] The middle part of the second circulating water tank is connected to the outside through the water outlet, or is connected to the first circulating water tank of the next group of circulating water tanks through the circulating gap.

[0012] In the utility model, a first flange and a second flange are respectively provided at the two ends of the mold body, and a reinforcing rib is provided on the outer surface of the mold body between the first flange and the second flange. The first flange, the second flange and the reinforcing rib jointly form the cooling water trough.

[0013] In the utility model, the reinforcing ribs include a first straight reinforcing rib and a second straight reinforcing rib, the first straight reinforcing rib and the second straight reinforcing rib are parallel to each other and spaced apart, one end of the first straight reinforcing rib and the second straight reinforcing rib are connected to the second flange, and the other ends extend axially and spaced apart from the first flange, and the water inlet groove is formed between the first straight reinforcing rib, the second flange and the second straight reinforcing rib.

[0014] In the present invention, the reinforcing ribs further include at least one group of ring segment reinforcing ribs, and one group of the ring segment reinforcing ribs includes the diverter ring segment reinforcing ribs and the circulating ring segment reinforcing ribs sequentially arranged between the first flange and the second flange;

[0015] One end of the diverter ring segment reinforcement rib is connected to the other end of the first straight segment reinforcement rib, and the other end is connected to the other end of the second straight segment reinforcement rib after being circumferentially connected, and the diverter water groove is formed between the diverter ring segment reinforcement rib and the first flange;

[0016] One end of the circulating ring segment reinforcement rib is spaced from the first straight segment reinforcement rib, and the other end is spaced from the other end of the second straight segment reinforcement rib after being circumferentially surrounded. The first circulating water groove is formed between the circulating ring segment reinforcement rib and the diversion ring segment reinforcement rib, and the second circulating water groove is formed between the circulating ring segment reinforcement rib and the second flange or the next group of diversion ring segment reinforcement ribs.

[0017] In the utility model, the reinforcement rib of the diversion ring segment is provided with a diversion notch which is distributed 180 degrees with the water inlet groove, and the other circumferential side of the diversion groove is connected with the middle part of the first circulating water groove through the diversion notch.

[0018] In the utility model, transition gaps are formed between the two ends of the circulating ring segment reinforcement rib and the first straight segment reinforcement rib and the second straight segment reinforcement rib, respectively, and the two ends of the first circulating water trough are connected to the two ends of the second circulating water trough through the transition gaps.

[0019] In the present invention, the water outlet is arranged on the second flange and is distributed 180 degrees to the water inlet groove;

[0020] Alternatively, the annular flow gap is arranged on the reinforcement rib of the next group of diversion ring segments and is distributed at 180 degrees to the water inlet groove.

[0021] In the present invention, the first flange, the second flange and the reinforcing ribs are all perpendicular to the outer surface of the mold body.

[0022] In the utility model, the first flange, the second flange and the reinforcing rib are all connected to the outer surface of the mold body by chamfered transition.

[0023] In the present invention, the cross-sectional widths of the diversion water trough, the first circulation water trough and the second circulation water trough are equal.

[0024] The beneficial effects of the utility model are as follows: the cooling medium flows from the water inlet into the cooling water trough of the mold cavity, flows from the water inlet into the diversion trough, diverts circumferentially in the diversion trough, converges in the diversion trough, then enters the first circulation trough and diverts circumferentially again to form two tributaries that enter the second circulation trough, and finally converges and flows out from the water outlet, that is, the cooling medium performs a "diversion-convergence-diversion-convergence" flow process between the water inlet and the water outlet, and a bidirectional synchronous flow cooling water channel structure is adopted between the water inlet position and the water outlet position, which ensures uniform circumferential cooling while improving the cooling efficiency of the mold cavity and effectively reducing the difference in cooling effect in the circumferential direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of the mold cavity of this embodiment;

[0026] Figure 2 It is the front view of the mold cavity of this embodiment;

[0027] Figure 3 It is a rear view of the mold cavity of this embodiment. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0029] like Figures 1 to 3As shown, this embodiment discloses a mold cavity with uniform and efficient cooling, including a mold body 1, a molding cavity 2 is provided in the mold body 1, and a cooling water groove 3 for cooling medium to flow is provided on the outer surface of the mold body 1, the cooling water groove 3 includes an inlet groove 31, a diverter groove 32 and at least one group of circulating water grooves 33; the diverter groove 32 is circumferentially surrounding, one end of the inlet groove 31 is provided with a water inlet 34, and the other end extends axially and is connected with one circumferential side of the diverter groove 32; a group of circulating water grooves 33 includes a first circulating water groove 331 and a second circulating water groove 332 surrounding in the circumferential direction; the other circumferential side of the diverter groove 32 is connected with the middle part of the first circulating water groove 331; the two ends of the first circulating water groove 331 are respectively connected with the two ends of the second circulating water groove 332; the middle part of the second circulating water groove 332 is connected with the outside through the water outlet 35, or is connected with the first circulating water groove 331 of the next group of circulating water grooves 33 through the circulation gap. The cooling medium flows from the water inlet 34 into the cooling water trough 3 of the mold cavity, flows from the water inlet trough 31 into the diversion trough 32, diverts circumferentially in the diversion trough 32, converges in the diversion trough 32, then enters the first circulation trough 331 and diverts circumferentially again to form two tributaries that enter the second circulation trough 332, and finally converges and flows out from the water outlet 35. That is, the cooling medium undergoes a "diversion-convergence-diversion-convergence" flow process between the water inlet 34 and the water outlet 35, and a bidirectional synchronous flow cooling water channel structure is adopted between the water inlet position and the water outlet position to ensure uniform circumferential cooling while improving the cooling efficiency of the mold cavity and effectively reducing the difference in cooling effect in the circumferential direction.

[0030] Specifically, when a group of circulating water troughs 33 is provided, the middle part of the second circulating water trough 332 is connected to the outside through the water outlet 35; the water inlet 34, the water inlet trough 31, the diversion water trough 32, the first circulating water trough 331, the second circulating water trough 332 and the water outlet 35 are connected in sequence;

[0031] When more than two groups of circulating water grooves 33 are provided, the circulating water grooves 33 are arranged along the axial direction of the mold body 1, the second circulating water groove 332 is connected to the first circulating water groove 331 of the next group of circulating water grooves 33 through the circulation gap, and the middle part of the second circulating water groove 332 of the last group of circulating water grooves 33 is connected to the outside through the water outlet 35.

[0032] In this embodiment, a first flange 4 and a second flange 5 are respectively provided at the two ends of the mold body 1, and a reinforcing rib 6 is provided between the first flange 4 and the second flange 5 on the outer surface of the mold body 1. The first flange 4, the second flange 5 and the reinforcing rib 6 together form a cooling water trough 3.

[0033] In this embodiment, the reinforcing rib 6 includes a first straight section reinforcing rib 61 and a second straight section reinforcing rib 62. The first straight section reinforcing rib 61 and the second straight section reinforcing rib 62 are parallel to each other and spaced apart. One end of the first straight section reinforcing rib 61 and the second straight section reinforcing rib 62 are connected to the second flange 5, and the other end extends axially and is spaced apart from the first flange 4. A water inlet groove 31 is formed between the first straight section reinforcing rib 61, the second flange 5 and the second straight section reinforcing rib 62.

[0034] In this embodiment, the reinforcing ribs 6 also include at least one group of annular reinforcing ribs 63. The first flange 4, the second flange 5, the first straight reinforcing ribs 61, the second straight reinforcing ribs 62 and the annular reinforcing ribs 63 are configured to form a cooling water trough 3 of the mold cavity. A group of ring segment reinforcement ribs 63 includes a diverter ring segment reinforcement rib 631 and a circulating ring segment reinforcement rib 632 arranged in sequence between the first flange 4 and the second flange 5; one end of the diverter ring segment reinforcement rib 631 is connected to the other end of the first straight segment reinforcement rib 61, and the other end is connected to the other end of the second straight segment reinforcement rib 62 after being circumferentially surrounded, and a diverter water groove 32 is formed between the diverter ring segment reinforcement rib 631 and the first flange 4; one end of the circulating ring segment reinforcement rib 632 is spaced from the first straight segment reinforcement rib 61, and the other end is spaced from the other end of the second straight segment reinforcement rib 62 after being circumferentially surrounded, a first circulating water groove 331 is formed between the circulating ring segment reinforcement rib 632 and the diverter ring segment reinforcement rib 631, and a second circulating water groove 332 is formed between the circulating ring segment reinforcement rib 632 and the second flange 5 or the next group of diverter ring segment reinforcement ribs 631.

[0035] In addition, the reinforcing ribs 6 may also be provided with more than two groups of ring segment reinforcing ribs 63, which is not shown in the attached drawings. The more than two groups of ring segment reinforcing ribs 63 are arranged in sequence along the axial direction, and each group of ring segment reinforcing ribs 63 includes a diverter ring segment reinforcing rib 631 and a circulating ring segment reinforcing rib 632 arranged in sequence along the axial direction between the first flange 4 and the second flange 5; in a group of ring segment reinforcing ribs 63 closest to the first flange 4, there is a certain distance between the diverter ring segment reinforcing rib 631 and the first flange 4 to form a diverter water trough 32; one end of the diverter ring segment reinforcing rib 631 is connected to the first straight segment reinforcing rib 61, and the other end of the diverter ring segment reinforcing rib 631 is connected to the second straight segment reinforcing rib 62 after being circumferentially surrounded, so that the water inlet trough 31 is connected to the diverter water trough 32;

[0036] In this embodiment, the diversion ring segment reinforcement rib 631 is provided with a diversion notch 633 that is 180 degrees apart from the water inlet groove 31, and the other side of the diversion water groove 32 in the circumferential direction is connected to the middle of the first circulation water groove 331 through the diversion notch 633;

[0037] Among them, in the group of ring segment reinforcement ribs 63 closest to the second flange 5, there is a certain distance between the second flange 5 and its circulation ring segment reinforcement ribs 632 to form a second circulation water groove 332. The ring segment reinforcement ribs 63 are connected in sequence, and their specific connection structure can refer to the connection structure when the reinforcement rib 6 is provided with a group of ring segment reinforcement ribs 63, which will not be described in detail here.

[0038] In this embodiment, transition gaps 634 are formed between the two ends of the circulation ring segment reinforcement rib 632 and the first straight segment reinforcement rib 61 and the second straight segment reinforcement rib 62, and the two ends of the first circulation water groove 331 are connected to the two ends of the second circulation water groove 332 through the transition gaps 634. Preferably, the water outlet 35 is arranged on the second flange 5 and is 180 degrees apart from the water inlet groove 31; or, the circulation gap is arranged on the next group of diversion ring segment reinforcement ribs 631 and is 180 degrees apart from the water inlet groove 31.

[0039] In this embodiment, the first flange 4, the second flange 5 and the reinforcing rib 6 are all perpendicular to the outer surface of the mold body 1. The first flange 4, the second flange 5 and the reinforcing rib 6 are all chamfered to the outer surface of the mold body 1. The cross-sectional widths of the diverter water groove 32, the first circulating water groove 331 and the second circulating water groove 332 are equal.

[0040] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A mold cavity with uniform and efficient cooling, comprising a mold body, a molding cavity is provided in the mold body, and a cooling water tank for cooling medium to flow is provided on the outer surface of the mold body, characterized in that: The cooling water tank includes a water inlet tank, a diversion tank and at least one group of circulating tanks; The diversion water trough is circumferentially surrounded, one end of the water inlet trough is provided with a water inlet, and the other end extends axially and communicates with one circumferential side of the diversion water trough; A group of the circulating water troughs includes a first circulating water trough and a second circulating water trough surrounding in the circumferential direction; The other circumferential side of the diversion water trough is connected to the middle of the first circulation water trough; The two ends of the first circulating water tank are respectively connected to the two ends of the second circulating water tank; The middle part of the second circulating water tank is connected to the outside through the water outlet, or is connected to the first circulating water tank of the next group of circulating water tanks through the circulating gap.

2. A uniform and efficient cooling mold cavity according to claim 1, characterized in that: The two ends of the mold body are respectively provided with a first flange and a second flange, and the outer surface of the mold body is provided with a reinforcing rib between the first flange and the second flange. The first flange, the second flange and the reinforcing rib jointly form the cooling water tank.

3. A uniform and efficient cooling mold cavity according to claim 2, characterized in that: The reinforcing ribs include a first straight reinforcing rib and a second straight reinforcing rib, the first straight reinforcing rib and the second straight reinforcing rib are parallel to each other and spaced apart, one end of the first straight reinforcing rib and the second straight reinforcing rib are connected to the second flange, and the other end extends axially and spaced apart from the first flange, and the water inlet groove is formed between the first straight reinforcing rib, the second flange and the second straight reinforcing rib.

4. A uniform and efficient cooling mold cavity according to claim 3, characterized in that: The reinforcing ribs further include at least one group of ring segment reinforcing ribs, wherein the group of ring segment reinforcing ribs includes a flow splitting ring segment reinforcing rib and a flow circulating ring segment reinforcing rib arranged in sequence between the first flange and the second flange; One end of the diverter ring segment reinforcement rib is connected to the other end of the first straight segment reinforcement rib, and the other end is connected to the other end of the second straight segment reinforcement rib after being circumferentially connected, and the diverter water groove is formed between the diverter ring segment reinforcement rib and the first flange; One end of the circulating ring segment reinforcement rib is spaced from the first straight segment reinforcement rib, and the other end is spaced from the other end of the second straight segment reinforcement rib after being circumferentially surrounded. The first circulating water groove is formed between the circulating ring segment reinforcement rib and the diversion ring segment reinforcement rib, and the second circulating water groove is formed between the circulating ring segment reinforcement rib and the second flange or the next group of diversion ring segment reinforcement ribs.

5. A uniform and efficient cooling mold cavity according to claim 4, characterized in that: The reinforcement ribs of the diversion ring segment are provided with diversion notches which are distributed 180 degrees to the water inlet groove, and the other circumferential side of the diversion water groove is connected with the middle part of the first circulating water groove through the diversion notches.

6. A uniform and efficient cooling mold cavity according to claim 4, characterized in that: Transition gaps are formed between the two ends of the circulating ring segment reinforcement rib and the first straight segment reinforcement rib and the second straight segment reinforcement rib, respectively. The two ends of the first circulating water trough are connected to the two ends of the second circulating water trough through the transition gaps.

7. A uniform and efficient cooling mold cavity according to claim 4, characterized in that: The water outlet is arranged on the second flange and is distributed 180 degrees to the water inlet groove; Alternatively, the annular flow gap is arranged on the reinforcement rib of the next group of diversion ring segments and is distributed at 180 degrees to the water inlet groove.

8. A uniform and efficient cooling mold cavity according to claim 2, characterized in that: The first flange, the second flange and the reinforcing ribs are all perpendicular to the outer surface of the mold body.

9. A uniform and efficient cooling mold cavity according to claim 2, characterized in that: The first flange, the second flange and the reinforcing rib are all transitioned to the outer surface of the mold body by using rounded corners.

10. A uniform and efficient cooling mold cavity according to claim 2, characterized in that: The cross-sectional widths of the diversion water trough, the first circulation water trough and the second circulation water trough are equal.

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