Injection mold with cooling water channel

Abstract

An injection mold with a cooling water channel comprises a front mold plate, a rear mold plate, an ejector pin mechanism, a front mold core installed on the front mold plate and a rear mold core installed on the rear mold plate, the rear mold core is provided with a first cooling water channel and an installation hole communicated with the first cooling water channel, and the rear mold core comprises a waterproof sleeve installed in the installation hole. The water insulation sleeve is provided with a movable channel arranged in a penetrating mode, the movable channel is isolated from the first cooling water way, the ejector pin mechanism comprises an ejector pin, the ejector pin penetrates through the rear mold plate and is movably arranged in the movable channel, and the front mold core, the rear mold core, the water insulation sleeve and the ejector pin jointly define a forming mold cavity used for forming a product; during demolding, the ejector pin ejects the product out along the movable channel.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with a cooling water channel. Background Art

[0002] In the process of producing products by injection molds, hot melt rubber is first injected into the molding cavity, and then the hot melt rubber in the molding cavity is cooled and shaped to obtain a molded plastic product, and finally the plastic product is ejected from the mold by an ejection structure. At present, injection molds and rubber are generally cooled by a cooling water channel set inside the mold. The cooling water channel is filled with coolant, and the coolant cools the molding cavity, template, mold core, etc. through the cooling water channel, so that the plastic product can be cooled.

[0003] However, some injection molds have limited space and have many ejector structures, so the ejector structure will interfere with the cooling water channel in space. If the ejector structure is reduced, the ejector structure will be ejected during demolding of the injection mold, causing uneven force on the product and causing product deformation. If the layout of the cooling water channel is reduced, the cooling effect of the injection mold and the product will be reduced, making the product molding time longer and resulting in low production efficiency, and even causing uneven cooling of the product to cause product warping and deformation.

[0004] Therefore, in view of the problem that the ejector pin structure and the cooling water channel in the current injection mold interfere with each other in space, it is urgent to develop a new machine or new technology to solve the above problem. Utility Model Content

[0005] The utility model aims to provide an injection mold with a cooling water channel to solve the problem of spatial interference between an ejector pin structure and the cooling water channel in the current injection mold.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An injection mold with a cooling water channel comprises a front mold plate, a rear mold plate, an ejector mechanism, a front mold core installed on the front mold plate, and a rear mold core installed on the rear mold plate. The rear mold core is provided with a first cooling water channel and a mounting hole connected to the first cooling water channel. The rear mold core comprises a water-isolating sleeve installed in the mounting hole. The water-isolating sleeve has a movable channel arranged therethrough. The movable channel is isolated from the first cooling water channel. The ejector mechanism comprises an ejector pin, which passes through the rear mold plate and is movably arranged in the movable channel. The front mold core, the rear mold core, the water-isolating sleeve, and the ejector pin jointly enclose a molding cavity for molding a product. When demolding, the ejector pin ejects the product along the movable channel.

[0008] Furthermore, the waterproof sleeve has a first fixing part, a connecting part and a second fixing part, the first fixing part and the second fixing part are respectively located at two ends of the connecting part, and the outer circumferential surface of the first fixing part and the outer circumferential surface of the second fixing part are both in contact with the hole wall of the mounting hole.

[0009] Furthermore, the outer diameter of the connecting portion is smaller than the outer diameters of the first fixing portion and the second fixing portion.

[0010] Furthermore, the outer diameter of the connection portion of the water-blocking sleeve is smaller than the inner diameter of the first cooling water channel, and at least a portion of the water-blocking sleeve is in contact with the coolant in the first cooling water channel.

[0011] Furthermore, a guide portion is protruding outwardly from the outer circumferential surface of the water-blocking sleeve at the connection between the first fixing portion and the connecting portion; a guide groove is formed at the intersection of the mounting hole and the first cooling water channel corresponding to the guide portion of the rear mold core, and the guide groove cooperates with the guide portion.

[0012] Furthermore, a limiting portion is protruded radially outwardly at the end of the second fixing portion of the water-blocking sleeve; a limiting groove is recessed in the rear mold core corresponding to the limiting portion, and the limiting groove cooperates with the limiting portion.

[0013] Furthermore, the limiting portion is flush with the lower surface of the rear mold core.

[0014] Furthermore, the waterproof sleeve includes a first sealing ring, and the first fixing portion of the waterproof sleeve is provided with a first groove for installing the first sealing ring, and the outer peripheral surface of the first sealing ring contacts with the hole wall of the installation hole.

[0015] Furthermore, the waterproof sleeve includes a second sealing ring, and the second fixing portion of the waterproof sleeve is provided with a second groove for installing the second sealing ring, and the outer peripheral surface of the second sealing ring contacts the hole wall of the installation hole.

[0016] Furthermore, the inner diameter of the movable channel is greater than the outer diameter of the ejector pin.

[0017] The utility model provides an injection mold with a cooling water channel, which has beneficial effects: the ejector pin and the first cooling water channel are isolated by a water-isolating sleeve, so that the ejector pin and the first cooling water channel do not interfere with each other in space, and the injection mold with the cooling water channel can ensure high cooling efficiency while ensuring that there are a sufficient number of ejectors to eject the product during demoulding, so that the product is evenly stressed and deformation of the product is avoided; the injection mold with the cooling water channel not only improves production efficiency, but also improves product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the injection mold with cooling water channels of the utility model.

[0019] Figure 2 for Figure 1 Enlarged cross-sectional view of point A in the middle.

[0020] Figure 3 for Figure 1 A partial cross-sectional view of the rear mold core of an injection mold having cooling water channels is shown.

[0021] Figure 4 for Figure 3 A partial stereoscopic view of the water-blocking sleeve of the rear mold core is shown. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.

[0024] See also Figure 1-Figure 3 An injection mold with a cooling water channel includes a front template 10, a rear template 30, an ejector mechanism 50, a front mold core 20 installed below the front template 10, and a rear mold core 40 installed above the rear template 30. The rear mold core 40 is provided with a first cooling water channel 41 and a mounting hole 42 connected to the first cooling water channel 41, and the coolant circulates in the first cooling water channel 41. The mounting hole 42 passes through the upper and lower surfaces of the rear mold core 40. The rear mold core 40 includes a water-blocking sleeve 43 installed in the mounting hole 42, and the water-blocking sleeve 43 has a movable channel 431 that passes through it, and the movable channel 431 is isolated from the first cooling water channel 41; the ejector mechanism 50 includes an ejector 51, and the ejector 51 passes through the rear mold plate 30 from bottom to top and is movably arranged in the movable channel 431. The front mold core 20, the rear mold core 40, the water-blocking sleeve 43, and the ejector 51 jointly enclose a molding cavity for molding products; when demolding, the ejector 51 ejects the product upward along the movable channel 431.

[0025] More specifically, the inner diameter of the movable channel 431 is greater than the outer diameter of the ejector pin 51 , so as to ensure that the ejector pin 51 can penetrate the movable channel 431 and move along the axial direction of the movable channel 431 .

[0026] From the above, the injection mold with a cooling water channel proposed in the utility model isolates the ejector pin 51 from the first cooling water channel 41 through the water-isolating sleeve 43, so that the ejector pin 51 and the first cooling water channel 41 do not interfere with each other in space, so that the injection mold with a cooling water channel can ensure high cooling efficiency while ensuring that there are a sufficient number of ejector pins 51 to eject the product during demolding so that the force is evenly applied to the product, thereby avoiding deformation of the product; the injection mold with a cooling water channel not only improves production efficiency, but also improves product yield.

[0027] See also Figure 2 and Figure 3 The waterproof sleeve 43 has a first fixing portion 432, a connecting portion 433 and a second fixing portion 434. The first fixing portion 432 and the second fixing portion 434 are respectively located at two ends of the connecting portion 433. The outer circumference of the first fixing portion 432 and the outer circumference of the second fixing portion 434 are in contact with the hole wall of the mounting hole 42. The waterproof sleeve 43 is installed in the mounting hole 42 of the rear mold core 40 through the first fixing portion 432 and the second fixing portion 434.

[0028] More specifically, the outer diameter of the connecting portion 433 is smaller than the outer diameters of the first fixing portion 432 and the second fixing portion 434 , and the inner diameter of the mounting hole 42 is larger than the outer diameters of the first fixing portion 432 and the second fixing portion 434 . Only with this arrangement can the waterproof sleeve 43 be smoothly installed in the mounting hole 42 .

[0029] See also Figure 2 The outer diameter of the connecting portion 433 of the water-blocking sleeve 43 is smaller than the inner diameter of the first cooling water channel 41, and the connecting portion 433 of the water-blocking sleeve 43 is at least partially in contact with the coolant in the first cooling water channel 41. The water-blocking sleeve 43 not only isolates the ejector pin 51 from the first cooling water channel 41, but also prevents the water-blocking sleeve 43 from being too large and causing the coolant in the first cooling water channel 41 to be blocked.

[0030] See also Figure 2-Figure 4 The outer circumferential surface of the water-blocking sleeve 43 is provided with a guide portion 435 protruding outward at the connection between the first fixing portion 432 and the connecting portion 433; the rear mold core 40 is provided with a guide groove 421 corresponding to the guide portion 435 at the intersection of the mounting hole 42 and the first cooling water channel 41, and the guide groove 421 cooperates with the guide portion 435. The cooperation between the guide portion 435 and the guide groove 421 can effectively prevent the first fixing portion 432 of the water-blocking sleeve 43 from being stuck at the intersection of the mounting hole 42 and the first cooling water channel 41, so that the first fixing portion 432 of the water-blocking sleeve 43 can be smoothly inserted into the mounting hole 42 to complete the installation.

[0031] The waterproof sleeve 43 is provided with a limiting portion 436 protruding radially outward at the end of the second fixing portion 434; the rear mold core 40 is provided with a limiting groove 422 corresponding to the limiting portion 436, and the limiting groove 422 cooperates with the limiting portion 436. More specifically, the limiting portion 436 is flush with the lower surface of the rear mold core 40. The limiting portion 436 enables the waterproof sleeve 43 to be installed at a predetermined position of the mounting hole 42, so that the upper and lower ends of the waterproof sleeve 43 remain flush with the upper and lower surfaces of the rear mold core 40, respectively, to ensure that the structure of the injection mold with a cooling water channel is not affected.

[0032] See also Figure 2 and Figure 4 The water-blocking sleeve 43 includes a first sealing ring 437 and a second sealing ring 438. The first fixing portion 432 of the water-blocking sleeve 43 is provided with a first groove 4321 for installing the first sealing ring 437, and the outer peripheral surface of the first sealing ring 437 contacts the hole wall of the mounting hole 42. The second fixing portion 434 of the water-blocking sleeve 43 is provided with a second groove 4341 for installing the second sealing ring 438, and the outer peripheral surface of the second sealing ring 438 contacts the hole wall of the mounting hole 42. The first sealing ring 437 and the second sealing ring 438 can prevent the coolant of the first cooling water channel 41 from leaking out of the rear mold core 40 through the mounting hole 42.

[0033] See also Figure 1 The rear template 30 is provided with a first water inlet and a first water outlet, and the first water inlet, the first water outlet, and the first cooling water channel 41 are connected. The injection mold with the cooling water channel also includes a conveying device, and the conveying device drives the coolant to circulate in the first water inlet, the first water outlet, and the first cooling water channel 41 to achieve the cooling and heat dissipation effect of the rear mold core 40.

[0034] The front mold core 20 is provided with a second cooling water channel, and the front mold plate 10 is provided with a second water inlet and a second water outlet. The second water inlet, the second water outlet, and the second cooling water channel are connected to each other. The conveying device drives the coolant to circulate in the second water inlet, the second water outlet, and the second cooling water channel to achieve the cooling and heat dissipation effect of the front mold core 20.

[0035] The ejector mechanism 50 further includes an ejector panel 52 and a driving device. The ejector panel 52 is disposed below the rear mold plate 30. The driving device drives the ejector panel 52 to move up and down. One end of the ejector 51 away from the molding cavity is fixed on the ejector panel 52. When demolding, the driving device drives the ejector panel 52 to move upward, and the ejector 51 moves upward with the ejector panel 52, thereby ejecting the product and completing demolding.

[0036] The utility model has the beneficial effect of an injection mold with a cooling water channel: the ejector pin and the cooling water channel are not spatially interfered with each other, which not only improves the production efficiency but also improves the product yield.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An injection mold with a cooling water channel, characterized in that: It comprises a front template, a rear template, an ejector mechanism, a front mold core installed on the front template, and a rear mold core installed on the rear template, the rear mold core is provided with a first cooling water channel and a mounting hole connected to the first cooling water channel, the rear mold core comprises a water-blocking sleeve installed in the mounting hole, the water-blocking sleeve has a movable channel penetrating therethrough, the movable channel is isolated from the first cooling water channel, the ejector mechanism comprises an ejector, the ejector penetrates the rear template and is movably arranged in the movable channel, the front mold core, the rear mold core, the water-blocking sleeve, and the ejector together enclose a molding cavity for molding products; During demoulding, the ejector pin ejects the product along the movable channel.

2. The injection mold with cooling water channel according to claim 1, characterized in that: The waterproof sleeve has a first fixing part, a connecting part and a second fixing part. The first fixing part and the second fixing part are respectively located at two ends of the connecting part. The outer peripheral surfaces of the first fixing part and the second fixing part are in contact with the hole wall of the mounting hole.

3. The injection mold with cooling water channel according to claim 2, characterized in that: An outer diameter of the connecting portion is smaller than an outer diameter of the first fixing portion and the second fixing portion.

4. The injection mold with cooling water channel according to claim 2, characterized in that: The outer diameter of the connecting portion of the water-blocking sleeve is smaller than the inner diameter of the first cooling water channel, and at least a portion of the water-blocking sleeve is in contact with the coolant in the first cooling water channel.

5. The injection mold with cooling water channel according to claim 2, characterized in that: The outer circumferential surface of the water-blocking sleeve is provided with a guide portion protruding outward at the connection between the first fixing portion and the connecting portion; the rear mold core is provided with a guide groove corresponding to the guide portion at the intersection of the mounting hole and the first cooling water channel, and the guide groove cooperates with the guide portion.

6. The injection mold with cooling water channel according to claim 2, characterized in that: The waterproof sleeve is provided with a limiting portion protruding radially outward at the end of the second fixing portion; the rear mold core is provided with a limiting groove corresponding to the limiting portion, and the limiting groove cooperates with the limiting portion.

7. The injection mold with cooling water channel according to claim 6, characterized in that: The limiting portion is flush with the lower surface of the rear mold core.

8. The injection mold with cooling water channel according to claim 2, characterized in that: The waterproof sleeve includes a first sealing ring. The first fixing portion of the waterproof sleeve is provided with a first groove for installing the first sealing ring. The outer peripheral surface of the first sealing ring contacts the hole wall of the installation hole.

9. The injection mold with cooling water channel according to claim 2, characterized in that: The waterproof sleeve includes a second sealing ring. The second fixing portion of the waterproof sleeve is provided with a second groove for installing the second sealing ring. The outer peripheral surface of the second sealing ring contacts the hole wall of the installation hole.

10. The injection mold with cooling water channel according to claim 1, characterized in that: The inner diameter of the movable channel is greater than the outer diameter of the ejector pin.

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