Lower mold core cooling system and injection mold

Abstract

The utility model provides a lower mold core cooling system and an injection mold. The lower mold core cooling system comprises a lower mold core fixing seat, a lower mold core and a plurality of cooling rods. The lower mold core fixing seat is provided with a cooling water channel and a plurality of first cooling water wells which are sequentially communicated with the cooling water channel, and the cooling water channel is used for introducing circulating cooling water; a plurality of forming protrusions are formed on the top of the lower mold core and used for forming a plurality of deep cavity hole positions of a product body, a plurality of second cooling water wells are formed in the bottom of the lower mold core, each second cooling water well extends to be arranged on the back of the corresponding forming protrusion, and the lower mold core is fixedly installed on the lower mold core fixing base. The plurality of first cooling water wells are communicated with the plurality of second cooling water wells in a one-to-one correspondence manner; the first end of each cooling rod is inserted into the corresponding first cooling water well, the second end of each cooling rod is arranged in the corresponding second cooling water well, and the multiple cooling rods are used for guiding heat from the second ends of the cooling rods to the first ends of the cooling rods.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a lower mold core cooling system and an injection mold. Background Technology

[0002] Existing injection molds typically use water cooling during the mold cooling stage. For plastic products with varying thicknesses or deep cavity structures, the upper or lower mold cores are often quite long. In such cases, water-blocking plates need to be installed at the corresponding upper or lower mold core locations to change the flow direction of the cooling water within the circular cooling channels, thereby improving the cooling and molding of the plastic product.

[0003] Currently, the most common water-blocking plates on the market are mainly formed by welding plugs and copper sheets. During installation, production personnel need to rely on their manual experience to perform processes such as grinding or cutting the copper sheets so that both sides of the copper sheets fit against the inner wall of the circular cooling channel to ensure the drainage effect of the copper sheets.

[0004] However, for plastic products with multiple deep cavity structures with small spacing, such as... Figure 1 The plastic product shown has a significant drop at its parting line, and the product body has multiple deep cavity holes with small spacing 1. This means that multiple water-blocking plates need to be installed at the corresponding lower mold core locations. As a result, production personnel need to grind or cut the copper sheets of multiple water-blocking plates one by one, which is a heavy workload. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a lower mold core cooling system and injection mold that is simpler to install than the traditional water-blocking plate, and reduces the workload of production personnel during the installation of the cooling rod.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A lower mold core cooling system, comprising:

[0008] The lower mold core fixing seat is provided with a cooling water channel and a plurality of first cooling water wells that are sequentially connected to the cooling water channel. The cooling water channel is used to introduce circulating cooling water.

[0009] The lower mold core has multiple forming protrusions on its top, which are used to form multiple deep cavity holes of the product body. The bottom of the lower mold core has multiple second cooling water wells, each of which extends to the back of the corresponding forming protrusion. The lower mold core is fixedly installed on the lower mold core fixing seat, so that the multiple first cooling water wells and the multiple second cooling water wells are connected in a one-to-one correspondence.

[0010] A plurality of cooling rods, wherein a first end of each cooling rod is inserted into a corresponding first cooling water well, and a second end of each cooling rod is disposed in a corresponding second cooling water well, the plurality of cooling rods being used to guide heat from the second end of the cooling rod to the first end of the cooling rod.

[0011] In one embodiment, at least one positioning portion is provided on the periphery of the first end of each cooling rod;

[0012] The lower mold core fixing seat is provided with at least one slot on the inner peripheral wall of each of the first cooling water wells. The slot is connected to the first cooling water well. When the first end of each cooling rod is inserted into the corresponding first cooling water well, the positioning part is engaged with the slot.

[0013] In one embodiment, each of the cooling rods has a heat-conducting through hole at its first end, and the heat-conducting through hole is connected to the cooling water channel.

[0014] In one embodiment, the central axis of the heat-conducting via coincides with the central axis of the cooling water channel.

[0015] In one embodiment, each of the cooling rods is sequentially fitted with the corresponding first cooling water well and the corresponding second cooling water well with a clearance value ranging from 0.1 mm to 0.3 mm.

[0016] In one embodiment, the lower mold core fixing seat is further provided with a plurality of annular grooves, each of the annular grooves being arranged around the end face of the corresponding first cooling water well that penetrates the lower mold core fixing seat;

[0017] The lower mold core cooling system also includes multiple elastic sealing rings, each of which is disposed in a corresponding annular groove.

[0018] In one embodiment, there are two cooling water channels, namely a first cooling water channel and a second cooling water channel, wherein a portion of the first cooling water wells are connected to the first cooling water channel, and another portion of the first cooling water wells are connected to the second cooling water channel.

[0019] In one embodiment, a plurality of the first cooling water well arrays are distributed.

[0020] In one embodiment, the lower mold core fixing seat is further provided with a first water inlet channel, a first water outlet channel, a second water inlet channel and a second water outlet channel; the first water inlet channel and the first water outlet channel are respectively connected to both ends of the first cooling water channel, and the second water inlet channel and the second water outlet channel are respectively connected to both ends of the second cooling water channel.

[0021] An injection mold includes an upper mold core, an upper mold core fixing seat, a side core pulling mechanism, and a lower mold core cooling system as described in any of the above embodiments. The upper mold core is fixedly installed on the upper mold core fixing seat, and the side core pulling mechanism is located between the upper mold core fixing seat and the lower mold core fixing seat. The upper mold core, the lower mold core, and the side core pulling mechanism are all used to jointly form the product body when the mold is closed.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] By extending the second cooling water well onto the back of the corresponding molding protrusion, the heat of the molten plastic liquid can be transferred to the second cooling water well via the shortest distance. Then, a cooling rod is used to guide the heat from the second end of the cooling rod to the first end, allowing the circulating cooling water entering the cooling water channel to pass through the first cooling water well, thereby carrying away the heat from the first end of the cooling rod. This invention's lower mold core cooling system, because the heat conduction method using the cooling rod replaces the traditional method of cooling by changing the flow direction of circulating cooling water using water baffles, is simpler to install than traditional water baffles. This eliminates the need for grinding or cutting the cooling rod during installation, reducing the workload of production personnel. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural diagram of a plastic product;

[0026] Figure 2 This is a schematic diagram of the lower mold core cooling system in one embodiment;

[0027] Figure 3 for Figure 2 The diagram shows a partial structural schematic of the lower mold core cooling system.

[0028] Figure 4 for Figure 2The diagram shows a partial exploded view of the cooling system for the lower mold core.

[0029] Figure 5 for Figure 2 The diagram shows the structure of the lower mold core cooling system.

[0030] Figure 6 for Figure 2 The diagram shows a sectional view of the cooling system for the lower mold core.

[0031] Figure 7 This is a partial structural diagram of an injection mold in one embodiment;

[0032] Figure 8 for Figure 7 A partial structural diagram of the injection mold shown;

[0033] Reference numerals: Lower mold core cooling system 10; Deep cavity hole 1; Lower mold core fixing seat 100; Cooling water channel 101; First cooling water channel 101a; Second cooling water channel 101b; First cooling water well 102; Slot 103; Annular groove 104; First water inlet channel 105; First water outlet channel 106; Second water inlet channel 107; Second water outlet channel 108; Lower mold core 200; Forming protrusion 210; Second cooling water well 201; Cooling rod 300; Positioning part 310; Heat conduction through hole 301; Elastic sealing ring 400; Upper mold core 500; Upper mold core fixing seat 600; Side core pulling mechanism 700. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] This disclosure provides a lower mold core cooling system, including a lower mold core fixing seat, a lower mold core, and a plurality of cooling rods. The lower mold core fixing seat has cooling water channels and a plurality of first cooling water wells sequentially connected to the cooling water channels, the cooling water channels being used to circulate cooling water; the top of the lower mold core has a plurality of forming protrusions, the plurality of forming protrusions being used to form a plurality of deep cavity holes of the product body; the bottom of the lower mold core has a plurality of second cooling water wells, each second cooling water well extending from the back of a corresponding forming protrusion; the lower mold core is fixedly installed on the lower mold core fixing seat, such that the plurality of first cooling water wells and the plurality of second cooling water wells are connected one-to-one; the first end of each cooling rod is inserted into a corresponding first cooling water well, and the second end of each cooling rod is disposed in a corresponding second cooling water well, the plurality of cooling rods being used to guide heat from the second end of the cooling rod to the first end of the cooling rod.

[0038] Please see Figures 1 to 6 To better understand the lower mold core cooling system 10 of this application, the following further explanation of the lower mold core cooling system 10 is provided:

[0039] One embodiment of the lower mold core cooling system 10 includes a lower mold core fixing seat 100, a lower mold core 200, and a plurality of cooling rods 300. The lower mold core fixing base 100 has a cooling water channel 101 and a plurality of first cooling water wells 102 connected sequentially to the cooling water channel 101. The cooling water channel 101 is used to circulate cooling water. The top of the lower mold core 200 has a plurality of forming protrusions 210, which are used to form a plurality of deep cavity holes 1 of the product body. The bottom of the lower mold core 200 has a plurality of second cooling water wells 201, each of which extends to the back of the corresponding forming protrusion 210. The lower mold core 200 is fixedly installed on the lower mold core fixing base 100, so that the plurality of first cooling water wells 102 and the plurality of second cooling water wells 201 are connected in a one-to-one correspondence. The first end of each cooling rod 300 is inserted into the corresponding first cooling water well 102, and the second end of each cooling rod 300 is disposed in the corresponding second cooling water well 201. The plurality of cooling rods 300 are used to guide heat from the second end of the cooling rod 300 to the first end of the cooling rod 300.

[0040] In this embodiment, by extending the second cooling water well 201 to the back of the corresponding molding protrusion 210, the heat of the molten plastic liquid can be transferred to the second cooling water well 201 over the shortest distance. Then, the cooling rod 300 guides the heat from the second end of the cooling rod 300 to the first end of the cooling rod 300, so that the circulating cooling water entering the cooling water channel 101 passes through the first cooling water well 102, thereby carrying away the heat from the first end of the cooling rod 300. The lower mold core cooling system 10 of this utility model replaces the traditional cooling method of changing the flow direction of circulating cooling water by using the heat conduction method of the cooling rod 300. Compared with the traditional water-separating plate, the installation method is simpler. During installation, the cooling rod 300 does not need to be ground or cut, reducing the workload of production personnel. It also eliminates the need to consider the problem of inconsistent fitting clearances, thereby better ensuring the cooling molding quality of the deep cavity hole 1 part of the plastic product.

[0041] It should be noted that the heat conduction working principle of the cooling rod 300 is existing technology. For details, please refer to the content of paragraph

[0025] of the Chinese patent document CN113547710B, which discloses a cooling rod assembly for molds. It will not be repeated here.

[0042] like Figure 4 As shown, in one embodiment, at least one positioning portion 310 protrudes from the periphery of the first end of each cooling rod 300; the lower mold core fixing seat 100 is also provided with at least one slot 103 on the inner peripheral wall of each first cooling water well 102, the slot 103 being connected to the first cooling water well 102, and when the first end of each cooling rod 300 is inserted into the corresponding first cooling water well 102, the positioning portion 310 engages with the slot 103. In this way, the first end of the cooling rod 300 can be conveniently fixedly installed in the first cooling water well 102.

[0043] like Figures 4 to 6As shown, in one embodiment, each cooling rod 300 has a heat-conducting through-hole 301 at its first end, and the heat-conducting through-hole 301 is connected to the cooling water channel 101. In one embodiment, the central axis of the heat-conducting through-hole 301 coincides with the central axis of the cooling water channel 101. Thus, the heat-conducting through-hole 301 at the first end of each cooling rod 300 can be connected to the cooling water channel 101. The circulating cooling water flowing into the cooling water channel 101 carries away the heat transferred to the first end of the cooling rod 300, thereby effectively replacing the traditional method of cooling by changing the flow direction of the circulating cooling water using a water baffle, and is also simpler to install than the traditional water baffle. Specifically, in this embodiment, the cooling water channel 101 is linearly connected to multiple heat-conducting through-holes 301, thereby effectively shortening the opening length of the cooling water channel 101 to increase the rate of circulating cooling water flow.

[0044] like Figure 6 As shown, in one embodiment, each cooling rod 300 is sequentially fitted with the corresponding first cooling water well 102 and the corresponding second cooling water well 201 with a clearance fit, the clearance value of which ranges from 0.1mm to 0.3mm. Specifically, in this embodiment, the clearance value of the clearance fit is 0.2mm, so that circulating cooling water can pass into the aforementioned preset gap, thereby allowing the heat of the lower mold core 200 to be uniformly and quickly transferred to the cooling rod 300 through the circulating cooling water, so as to better ensure the cooling effect of the cooling rod 300 on the corresponding deep cavity hole 1.

[0045] like Figures 2 to 6 As shown, in one embodiment, the lower mold core fixing seat 100 is further provided with a plurality of annular grooves 104, each annular groove 104 being arranged around the end face of the corresponding first cooling water well 102 that penetrates the lower mold core fixing seat 100; the lower mold core cooling system 10 also includes a plurality of elastic sealing rings 400, each elastic sealing ring 400 being disposed within the corresponding annular groove 104. This ensures an airtight connection between the first cooling water well 102 and the second cooling water well 201 after the lower mold core 200 is fixedly installed in the lower mold core fixing seat 100, thereby preventing water leakage.

[0046] like Figure 2 and Figure 5As shown, in one embodiment, there are two cooling water channels 101, namely a first cooling water channel 101a and a second cooling water channel 101b. A portion of the first cooling water wells 102 are connected to the first cooling water channel 101a, and another portion of the first cooling water wells 102 are connected to the second cooling water channel 101b. This use of two cooling water channels 101 ensures effective cooling of the multiple cooling rods 300, thus significantly improving the efficiency of removing heat from multiple cooling rods 300 simultaneously per unit time.

[0047] like Figure 4 and Figure 5 As shown, in one embodiment, a plurality of the first cooling water wells 102 are arrayed. This facilitates the linear series connection of the first cooling water channel 101a to a portion of the first cooling water wells 102, and the linear series connection of the second cooling water channel 101b to another portion of the first cooling water wells 102. It also facilitates the drilling and forming of the first cooling water channel 101a and the second cooling water channel 101b in the lower mold core fixing seat 100.

[0048] like Figure 5 As shown, in one embodiment, the lower mold core fixing seat 100 is further provided with a first water inlet channel 105, a first water outlet channel 106, a second water inlet channel 107, and a second water outlet channel 108. The first water inlet channel 105 and the first water outlet channel 106 are respectively connected to both ends of the first cooling water channel 101a, and the second water inlet channel 107 and the second water outlet channel 108 are respectively connected to both ends of the second cooling water channel 101b. Thus, circulating cooling water is introduced into the first water inlet channel 105 and the second water inlet channel 107, and the circulating cooling water is discharged through the first water outlet channel 106 and the second water outlet channel 108, respectively. The first water inlet channel 105, the second water inlet channel 107, the first water outlet channel 106, and the second water outlet channel 108 are all connected to a mold temperature controller, which provides circulating cooling water to the first cooling water channel 101a and the second cooling water channel 101b.

[0049] Please refer to the following: Figures 1 to 8 This application also provides an injection mold, including an upper mold core 500, an upper mold core fixing seat 600, a side core pulling mechanism 700, and a lower mold core cooling system 10 as described in any of the above embodiments. The upper mold core 500 is fixedly installed on the upper mold core fixing seat 600, and the side core pulling mechanism 700 is located between the upper mold core fixing seat 600 and the lower mold core fixing seat 100. The upper mold core 500, the lower mold core 200, and the side core pulling mechanism 700 are all used to jointly form the product body when the mold is closed.

[0050] In this embodiment, the injection mold employs the aforementioned lower mold core cooling system 10. Specifically, the second cooling water well 201 is extended and positioned on the back of the corresponding molding protrusion 210, allowing the heat of the molten plastic liquid to be transferred to the second cooling water well 201 over the shortest distance. Then, the cooling rod 300 directs the heat from its second end to its first end, so that the circulating cooling water entering the cooling water channel 101 passes through the first cooling water well 102, thereby carrying away the heat from the first end of the cooling rod 300. This invention, by using the cooling rod 300 for heat conduction instead of the traditional method of cooling by changing the flow direction of circulating cooling water using a water separator, and by simplifying the installation of the cooling rod 300 compared to the traditional method, eliminates the need for grinding or cutting the cooling rod 300 during installation, reducing the workload of production personnel.

[0051] It should be noted that the upper mold core fixing seat 600 is connected to the fixed mold (not shown in the figure), and the lower mold core fixing seat 100 is connected to the moving mold (not shown in the figure).

[0052] Compared with the prior art, the present invention has at least the following advantages:

[0053] By extending the second cooling water well onto the back of the corresponding molding protrusion, the heat of the molten plastic liquid can be transferred to the second cooling water well via the shortest distance. Then, a cooling rod is used to guide the heat from the second end of the cooling rod to the first end, allowing the circulating cooling water entering the cooling water channel to pass through the first cooling water well, thereby carrying away the heat from the first end of the cooling rod. This invention's lower mold core cooling system, because the heat conduction method using the cooling rod replaces the traditional method of cooling by changing the flow direction of circulating cooling water using water baffles, is simpler to install than traditional water baffles. This eliminates the need for grinding or cutting the cooling rod during installation, reducing the workload of production personnel.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lower mold core cooling system, characterized in that, include: The lower mold core fixing seat is provided with a cooling water channel and a plurality of first cooling water wells that are sequentially connected to the cooling water channel. The cooling water channel is used to introduce circulating cooling water. The lower mold core has multiple forming protrusions on its top, which are used to form multiple deep cavity holes of the product body. The bottom of the lower mold core has multiple second cooling water wells, each of which extends to the back of the corresponding forming protrusion. The lower mold core is fixedly installed on the lower mold core fixing seat, so that the multiple first cooling water wells and the multiple second cooling water wells are connected in a one-to-one correspondence. A plurality of cooling rods, wherein a first end of each cooling rod is inserted into a corresponding first cooling water well, and a second end of each cooling rod is disposed in a corresponding second cooling water well, the plurality of cooling rods being used to guide heat from the second end of the cooling rod to the first end of the cooling rod.

2. The lower mold core cooling system according to claim 1, characterized in that, At least one positioning part is provided on the periphery of the first end of each of the cooling rods; The lower mold core fixing seat is provided with at least one slot on the inner peripheral wall of each of the first cooling water wells. The slot is connected to the first cooling water well. When the first end of each cooling rod is inserted into the corresponding first cooling water well, the positioning part is engaged with the slot.

3. The lower mold core cooling system according to claim 2, characterized in that, Each of the cooling rods has a heat-conducting through hole at its first end, and the heat-conducting through hole is connected to the cooling water channel.

4. The lower mold core cooling system according to claim 3, characterized in that, The central axis of the heat-conducting via coincides with the central axis of the cooling water channel.

5. The lower mold core cooling system according to claim 1, characterized in that, Each of the cooling rods is sequentially fitted with the corresponding first cooling water well and the corresponding second cooling water well with a clearance value ranging from 0.1 mm to 0.3 mm.

6. The lower mold core cooling system according to claim 1, characterized in that, The lower mold core fixing seat is also provided with a plurality of annular grooves, each of the annular grooves being arranged around the end face of the corresponding first cooling water well that penetrates the lower mold core fixing seat; The lower mold core cooling system also includes multiple elastic sealing rings, each of which is disposed in a corresponding annular groove.

7. The lower mold core cooling system according to claim 1, characterized in that, There are two cooling water channels, namely a first cooling water channel and a second cooling water channel. Some of the first cooling water wells are connected to the first cooling water channel, and some of the first cooling water wells are connected to the second cooling water channel.

8. The lower mold core cooling system according to claim 7, characterized in that, Multiple arrays of the first cooling water wells are distributed.

9. The lower mold core cooling system according to claim 8, characterized in that, The lower mold core fixing seat is also provided with a first water inlet channel, a first water outlet channel, a second water inlet channel and a second water outlet channel; the first water inlet channel and the first water outlet channel are respectively connected to both ends of the first cooling water channel, and the second water inlet channel and the second water outlet channel are respectively connected to both ends of the second cooling water channel.

10. An injection mold, characterized in that, The device includes an upper mold core, an upper mold core fixing seat, a side core pulling mechanism, and a lower mold core cooling system as described in any one of claims 1-9. The upper mold core is fixedly installed on the upper mold core fixing seat, and the side core pulling mechanism is located between the upper mold core fixing seat and the lower mold core fixing seat. The upper mold core, the lower mold core, and the side core pulling mechanism are all used to jointly form the product body when the mold is closed.

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