Plastic product mold with cooling water channel

Abstract

The utility model discloses a plastic product mold with a cooling water channel, relates to the related field of injection molds, and aims to solve the problems that the temperature of a cooling medium in the water channel is gradually reduced along with heat exchange when the input end of the water channel in the prior art is preferentially contacted with the mold to start heat exchange; a large temperature difference exists between the input end and the output end of the same water channel, and cooling is not uniform. Water inlet distribution channels are formed in the outer ends in the lower mold and the upper mold, inner pipe bodies are formed in the lower mold and the upper mold along the inner end arrays of the water inlet distribution channels, middle fixing pipes are arranged in the lower mold core and the upper mold core along the inner ends of the inner pipe bodies, and middle cooling channels are formed in the middle fixing pipes and the inner pipe bodies. The lower mold core and the upper mold core are integrally connected with a distribution head along the inner end of the middle cooling channel, a slow flow channel is formed in the lower mold core and the upper mold core along the space around the distribution head, and an annular cooling channel is formed in the lower mold core and the upper mold core along the outer end of the slow flow channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold relevant field, concretely is a kind of plastic product mold with cooling water channel. BACKGROUND

[0002] Plastic product mold is the key component in injection molding process, through the cavity and core of mold, molten plastic is injected and cooled and solidified, finally forms the plastic product of required shape.Injection molding as one of the main production methods of plastic products, with high production efficiency, product size precision is high, surface quality is good and so on, it is widely used in automobile, electronics, household appliances, medical treatment and other fields.The design and manufacturing level of plastic product mold is directly related to the quality and production efficiency of plastic product.In injection molding process, the role of cooling system is crucial.Plastic product can be smoothly demoulded after cooling and solidification to certain rigidity in mold, avoid deformation due to external force, and well-designed cooling system can significantly shorten molding time, improve production efficiency and reduce cost.

[0003] Cooling system removes heat from mold through cooling water channel, realizes the rapid cooling of plastic product.Due to the action of cooling water pipe, heat is transferred from plastic in mold cavity to cooling water pipe through heat conduction, and then is taken away by cooling liquid through heat convection.

[0004] But the cooling water channel of cooling system on many injection molds is designed spirally, for example, the Chinese authorized patent (a 3D printing injection mold) with announcement number CN 207643583U includes die plate, guide column, bottom plate, foot pad, punch plate and guide sleeve, the die plate is integrally formed by 3D printing, a one-off cooling water channel is arranged in the die plate, the main body of the one-off cooling water channel is double helix structure, the guide column is provided with four, is uniformly fixed and installed on the upper end surface of punch plate, the foot pad is provided with two, is symmetrically fixed and installed on the bottom plate, the punch plate is fixed and installed on the foot pad, the punch plate is integrally formed by 3D printing, a two-off cooling water channel is arranged in the punch plate, the main body of the two-off cooling water channel is double helix structure.Although it has the function of cooling, but the input end of water channel and mold preferentially contact to start heat exchange, the temperature of cooling medium in water channel gradually decreases with the heat exchange, there is a large temperature difference between the input end and output end of the same water channel, and the cooling is uneven. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of plastic product mold with cooling water channel to solve the problem that the input end of water channel and mold preferentially contact to start heat exchange in the above background technology, the temperature of cooling medium in water channel gradually decreases with the heat exchange, there is a large temperature difference between the input end and output end of the same water channel, and the cooling is uneven.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of plastic product mould with cooling water channel, including lower mould and upper mould, lower mould and upper mould inner end surface middle are respectively equipped with lower mould core and upper mould core, the outer end of lower mould and upper mould inside is equipped with water inlet distribution passage, water inlet distribution passage is "day" shape, the inner end of water inlet distribution passage is formed into inner tube body in lower mould and upper mould, the inner end of inner tube body is provided with intermediate fixed pipe in lower mould core and upper mould core, intermediate fixed pipe and inner tube body interior form intermediate cooling passage, the inner end of intermediate cooling passage is integrally connected with distribution head in lower mould core and upper mould core, the space around distribution head is formed into slow-flow passage in lower mould core and upper mould core, the outer end of slow-flow passage is formed into annular cooling passage in lower mould core and upper mould core.

[0007] Preferably, the outer end of annular cooling passage is formed into annular water delivery channel in lower mould and upper mould, annular water delivery channel is separated by inner tube body with intermediate cooling passage, annular cooling passage is separated by intermediate fixed pipe with intermediate cooling passage, the outer end between left and right adjacent two annular water delivery channels is equipped with connecting drain channel in lower mould and upper mould, the outer side of one side annular water delivery channel is equipped with water delivery collection channel in lower mould and upper mould.

[0008] Preferably, the side of water inlet distribution passage is equipped with water inlet channel in lower mould and upper mould, and the other end of water inlet channel is fixed with water inlet pipe in one side of lower mould and upper mould.

[0009] Preferably, the front and rear ends of upper end of water delivery collection channel are equipped with vertical connecting channel in lower mould and upper mould, and outer cooling channel is equipped with outer cooling channel in lower mould and upper mould outside lower mould core and upper mould core, and outer cooling channel is communicated with vertical connecting channel inside.

[0010] Preferably, the side of outer cooling channel is equipped with drainage collection channel in lower mould and upper mould, and the other end of drainage collection channel is fixed with drainage pipe in one side of lower mould and upper mould, and the inside of water inlet pipe, water inlet channel, water inlet distribution passage, intermediate cooling passage, slow-flow passage, annular cooling passage, annular water delivery channel, connecting drain channel, water delivery collection channel, vertical connecting channel, outer cooling channel, drainage collection channel and drainage pipe are communicated in sequence.

[0011] Preferably, the front and rear ends of inner end of intermediate fixed pipe outside are fixed with fixed block, and the other end of fixed block is fixed with lower mould core or upper mould core.

[0012] Preferably, injection cavity is formed between lower mould core and upper mould core, ejection groove is equipped in lower mould and lower mould core along lower end of injection cavity, and ejector pin is arranged in ejection groove, mould base is arranged in lower end of lower mould, and injection port is arranged in the middle of upper end of upper mould.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] (1) in the utility model, through the "day" shape design of water inlet distribution channel, cooling medium can be evenly distributed, so that the cooling medium enters each intermediate cooling channel, the water flows to the inner end and contacts the distribution head, and then enters the slow flow channel after hitting the distribution head, and then flows into the annular cooling channel, which carries away the heat of the product in the injection cavity absorbed by the lower mold core and the upper mold core; because the distribution of the water inlet distribution channel enables the cooling medium to exchange heat at a normal input temperature, the problem of uneven cooling caused by the fact that the input end of the water channel and the mold preferentially contact to start heat exchange, the temperature of the cooling medium in the water channel gradually decreases with the heat exchange, and there is a large temperature difference between the input end and the output end of the same water channel is solved.

[0015] (2) in the utility model, the water outlet enters the water conveying collection channel through the connection of the annular water conveying channel and the connection drainage channel between the annular water conveying channels, and then enters the outer cooling channel through the vertical connection channel, so that the lower mold core and the upper mold core are externally cooled, the mold can be quickly and comprehensively cooled, and the cooling efficiency is significantly improved.

[0016] (3) in the utility model, due to the uniformity and high efficiency of the cooling effect, the plastic product is not easy to produce deformation, shrinkage and other defects in the forming process, and the forming quality of the product is improved. DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of a plastic product mold with a cooling water channel from the front view angle of the utility model;

[0018] Figure 2 It is a whole structure schematic view of a plastic product mold with a cooling water channel from the lower view angle of the utility model;

[0019] Figure 3 It is a structure schematic view of the lower mold of a plastic product mold with a cooling water channel of the utility model;

[0020] Figure 4 It is a top view of the lower mold of a plastic product mold with a cooling water channel of the utility model;

[0021] Figure 5 It is a sectional view of the plastic product mold with a cooling water channel of the utility model at A-A;

[0022] Figure 6 It is an enlarged view of E of the plastic product mold with a cooling water channel of the utility model;

[0023] Figure 7The utility model provides a B-B section view of a plastic product mould with cooling water channel,

[0024] Figure 8 The utility model provides a front view of the lower mould of a plastic product mould with cooling water channel,

[0025] Figure 9 The utility model provides a C-C section view of a plastic product mould with cooling water channel,

[0026] Figure 10 The utility model provides a D-D section view of a plastic product mould with cooling water channel.

[0027] In the figure: 1, lower mould; 2, lower mould core; 3, upper mould; 4, upper mould core; 5, injection cavity; 6, ejection groove; 7, ejector pin; 8, injection port; 9, water inlet pipe; 10, water inlet channel; 11, water inlet distribution channel; 12, intermediate cooling channel; 13, annular water delivery channel; 14, fixed block; 15, intermediate fixed pipe; 16, distribution head; 17, slow-flow channel; 18, annular cooling channel; 19, connecting drainage channel; 20, water delivery collection channel; 21, vertical connection channel; 22, external cooling channel; 23, drainage collection channel; 24, drain pipe; 25, mould base. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0029] Please refer to Figures 1-10 The utility model provides an embodiment: a plastic product mould with cooling water channel, including lower mould 1 and upper mould 3, lower mould 1 lower end sets up mould base 25, provides stable support. Upper mould 3 upper end centrally sets up injection port 8, is used for injecting plastic raw materials. Form injection cavity 5 between lower mould core 2 and upper mould core 4, is used for injection molding. In the lower mould 1 and lower mould core 2, along the injection cavity 5 lower end common array opening ejection groove 6 is set up in ejection groove 6 and sets up ejector pin 7, is used for ejecting the plastic product after forming.

[0030] In the lower mould 1 and upper mould 3 inner end face middle, respectively install lower mould core 2 and upper mould core 4. This part is the basic structure of mould, and its structure and function are generally known.

[0031] For example Figure 9As shown in the drawings, the water inlet distribution channel 11 is arranged in the outer end of the lower mold 1 and the upper mold 3, which is in the shape of "sun" and can uniformly distribute the cooling medium into each intermediate cooling channel 12, ensuring the uniformity of the cooling effect and avoiding the problems of local overheating or insufficient cooling. The water inlet channel 10 is arranged in the lower mold 1 and the upper mold 3 along one side of the water inlet distribution channel 11, and the water inlet pipe 9 is fixed to the other end of the water inlet channel 10.

[0032] As shown in the drawings, Figure 5 and Figure 6 the inner pipe body is arranged in the lower mold 1 and the upper mold 3 along the inner end of the water inlet distribution channel 11, the intermediate fixed pipe 15 is arranged in the lower mold core 2 and the upper mold core 4 along the inner end of the inner pipe body, the intermediate fixed pipe 15 and the inner pipe body form the intermediate cooling channel 12, the distribution head 16 is integrally connected to the lower mold core 2 and the upper mold core 4 along the inner end of the intermediate cooling channel 12, and the slow-flow channel 17 is formed in the lower mold core 2 and the upper mold core 4 along the space around the distribution head 16. After the cooling medium hits the distribution head 16, the flow direction of the cooling medium changes and enters the slow-flow channel 17, so that the water flow speed is slowed down, and the cooling medium is more fully contacted with the mold. The outer end of the slow-flow channel 17 forms the annular cooling channel 18, which directly takes away the heat of the product in the injection cavity 5 absorbed by the lower mold core 2 and the upper mold core 4, thereby realizing direct cooling of the mold, fast cooling speed and good effect.

[0033] As shown in the drawings, Figure 7 and Figure 10 the annular water conveying channel 13 is formed in the lower mold 1 and the upper mold 3 along the outer end of the annular cooling channel 18, and the water outlet is introduced into the water conveying collection channel 20 through the connection drainage channel 19; the vertical connection channel 21 is arranged at the front and rear ends of the upper end of the water conveying collection channel 20, so as to introduce the cooling medium into the outer cooling channel 22 and cool the lower mold core 2 and the upper mold core 4 from the outside. The drainage collection channel 23 is arranged in the lower mold 1 and the upper mold 3 along one side of the outer cooling channel 22, and the cooling medium is discharged from the mold through the drainage pipe 24. The arrangement of the drainage collection channel and the drainage pipe makes the discharge of the cooling medium more smooth, and avoids the phenomenon of water accumulation in the mold.

[0034] The water inlet pipe 9, the water inlet channel 10, the water inlet distribution channel 11, the intermediate cooling channel 12, the slow-flow channel 17, the annular cooling channel 18, the annular water conveying channel 13, the connection drainage channel 19, the water conveying collection channel 20, the vertical connection channel 21, the outer cooling channel 22, the drainage collection channel 23 and the drainage pipe 24 are sequentially communicated.

[0035] As shown in the drawings, Figure 5 and Figure 6As shown, the annular water conveying passage 13 is separated from the intermediate cooling passage 12 by the inner tube body, and the annular cooling passage 18 is separated from the intermediate cooling passage 12 by the intermediate fixed tube 15; the intermediate fixed tube 15 is fixedly connected with the lower mold core 2 or the upper mold core 4 through the fixed block 14, so as to avoid the intermediate fixed tube 15 from being suspendedly arranged.

[0036] Working principle: the cooling medium enters the water inlet passage 10 through the water inlet pipe 9, then enters each intermediate cooling passage 12 through the water inlet distribution passage 11, and flows to the inner end until contacting the distribution head 16, enters the slow flow passage 17 after beating the distribution head 16, and then flows into the annular cooling passage 18, which takes away the heat of the product in the injection cavity 5 absorbed by the lower mold core 2 and the upper mold core 4.

[0037] The water outlet continues to pass through the annular water conveying passage 13, and enters the water conveying collection passage 20 through the communication of the drain passage 19 connected between the annular water conveying passages 13, and then enters the outer cooling passage 22 through the vertical connecting passage 21, so as to cool the lower mold core 2 and the upper mold core 4 from the outside, and finally is discharged through the drain collection passage 23 and the drain pipe 24.

[0038] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A plastic product mold with cooling water channels, comprising a lower mold (1) and an upper mold (3), a lower mold core (2) and an upper mold core (4) being respectively installed in the inner end face of the lower mold (1) and the upper mold (3), characterized in that: An inlet water distribution channel (11) is provided at the outer ends inside the lower die (1) and the upper die (3). The inlet water distribution channel (11) is in the shape of a "day". Inside the lower die (1) and the upper die (3), inner tubes are arrayed along the inner ends of the inlet water distribution channel (11). Inside the lower die core (2) and the upper die core (4), an intermediate fixed tube (15) is provided along the inner ends of the inner tubes. An intermediate cooling channel (12) is formed inside the intermediate fixed tube (15) and the inner tubes. Inside the lower die core (2) and the upper die core (4), a distribution head (16) is integrally connected along the inner ends of the intermediate cooling channel (12). Inside the lower die core (2) and the upper die core (4), a slow flow channel (17) is formed in the space around the distribution head (16). Inside the lower die core (2) and the upper die core (4), an annular cooling channel (18) is formed along the outer ends of the slow flow channel (17).

2. A plastic article mold with a cooling water channel according to claim 1, characterized in that: An annular water conveyance channel (13) is formed along the outer ends of the annular cooling channel (18) inside the lower die (1) and the upper die (3). The annular water conveyance channel (13) and the intermediate cooling channel (12) are separated by the inner tubes. The annular cooling channel (18) and the intermediate cooling channel (12) are separated by the intermediate fixed tube (15). Inside the lower die (1) and the upper die (3), a connecting hydrophobic channel (19) is provided at the outer ends between two adjacent left and right annular water conveyance channels (13). Inside the lower die (1) and the upper die (3), a water conveyance summary channel (20) is provided on the outer side of one side of the annular water conveyance channel (13).

3. A plastic article mold with a cooling water channel according to claim 2, characterized in that: An inlet water channel (10) is provided on one side of the inlet water distribution channel (11) inside the lower die (1) and the upper die (3). On one side of the lower die (1) and the upper die (3), a water inlet pipe (9) is fixed along the other end of the inlet water channel (10).

4. A plastic article mold with a cooling water channel according to claim 3, characterized in that: Vertical connecting channels (21) are provided at the front and rear ends of the upper end of the water conveyance summary channel (20) inside the lower die (1) and the upper die (3). Outer cooling channels (22) are provided outside the lower die core (2) and the upper die core (4) inside the lower die (1) and the upper die (3). The outer cooling channels (22) are internally connected to the vertical connecting channels (21).

5. A plastic article mold with a cooling water channel according to claim 4, characterized in that: A drainage summary channel (23) is provided on one side of the outer cooling channel (22) inside the lower die (1) and the upper die (3). On one side of the lower die (1) and the upper die (3), a drainage pipe (24) is fixed along the other end of the drainage summary channel (23); the water inlet pipe (9), the inlet water channel (10), the inlet water distribution channel (11), the intermediate cooling channel (12), the slow flow channel (17), the annular cooling channel (18), the annular water conveyance channel (13), the connecting hydrophobic channel (19), the water conveyance summary channel (20), the vertical connecting channels (21), the outer cooling channels (22), the drainage summary channel (23) and the drainage pipe (24) are internally connected in sequence.

6. A plastic article mold with a cooling water channel according to claim 1, characterized in that: Fixed blocks (14) are fixed at the front and rear ends of the inner end of the outer side of the intermediate fixed tube (15). The other ends of the fixed blocks (14) are fixed to the lower die core (2) or the upper die core (4).

7. A plastic article mold with a cooling water channel according to claim 1, characterized in that: The lower mold core (2) and the upper mold core (4) form an injection cavity (5), the lower mold (1) and the lower mold core (2) are provided with a plurality of ejection grooves (6) along the lower end of the injection cavity (5), the ejection grooves (6) are provided with a plurality of ejector pins (7), the lower end of the lower mold (1) is provided with a mold base (25), and the upper end of the upper mold (3) is provided with an injection port (8).

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