Anti-sticking injection mold

Abstract

The utility model discloses a kind of anti-sticking mold injection molds, for the injection molding of TPU material, including upper die plate and the upper die kernel of being installed on upper die plate, lower die plate and the lower die kernel of being installed on lower die plate, located the row position assembly of two opposite sides of upper die kernel and lower die kernel, row position assembly along with anti-sticking mold injection mold horizontal sliding, upper die kernel, lower die kernel and row position assembly are collectively enclosed for the cavity of product forming, upper die plate and lower die plate are respectively provided with mutually matched rubber plug sleeve and rubber plug, and rubber plug sleeve and rubber plug distribute at the outer periphery of upper die kernel and lower die kernel, when opening mold, the row position assembly located in the two sides of upper die kernel and lower die kernel simultaneously slide back to separate from upper die kernel and lower die kernel, after the product in cavity completely separates from row position assembly, upper die kernel moves towards the direction away from lower die kernel until rubber plug separates from rubber plug, finally eject product to complete demolding action.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to an anti-stick injection mold. Background Technology

[0002] TPU, as an injection molding material, has gradually become the preferred material in fields such as medical and health care, electronics, and industrial products due to its high performance, environmental resistance, strong plasticity, and environmental friendliness. However, because TPU material has very strong adhesion, when using existing injection molds to injection mold TPU material, the mold opening structure, which uses an upper mold plate, lower mold plate, and sliding mechanism to open synchronously, poses a risk of damage at the parting line of the product. This can easily cause scratches or deformation on the product's surface, preventing the injection-molded product from proceeding to the next process.

[0003] Therefore, there is an urgent need to develop a new injection mold to solve the above-mentioned problems of surface tearing or deformation. Utility Model Content

[0004] The purpose of this invention is to provide an anti-stick injection mold that can effectively prevent product surface deformation or tearing during demolding.

[0005] This utility model provides an anti-stick injection mold for injection molding of TPU material. It includes an upper mold plate and an upper mold core mounted on the upper mold plate, a lower mold plate and a lower mold core mounted on the lower mold plate, and sliding components located on opposite sides of the upper and lower mold cores. The sliding components slide horizontally along the anti-stick injection mold. The upper mold core, lower mold core, and sliding components together form a cavity for product molding. The upper and lower mold plates are respectively provided with mating rubber plug sleeves and rubber plugs, and the rubber plug sleeves and rubber plugs are distributed on the outer periphery of the upper and lower mold cores.

[0006] When the mold is opened, the sliding components located on both sides of the upper mold core and the lower mold core slide in opposite directions to separate from the upper mold core and the lower mold core. After the product in the cavity is completely separated from the sliding components, the upper mold core moves away from the lower mold core until the rubber plug is removed from the rubber plug sleeve, and finally the product is ejected to complete the demolding action.

[0007] Furthermore, the slide assembly has a side forming groove recessed on the end face near the upper mold core and the lower mold core, the lower mold core has a lower forming groove recessed and communicating with the side forming groove, and the upper mold core has an upper forming groove recessed and communicating with the side forming groove. The lower forming groove, the upper forming groove, and the side forming groove together form the cavity for molding the product.

[0008] Furthermore, the lower mold core has a recessed lower hot runner on its upper surface, which is connected to the lower forming groove, and the upper mold core has a recessed upper hot runner on its lower surface, which is connected to the upper forming groove.

[0009] Furthermore, the lower mold core has a vertically penetrating ejector pin hole, the port of which is located on the path of the lower hot runner and connected to the lower hot runner. An ejector pin is movably installed in the ejector pin hole, and the ejector pin is used to eject the sprue material and the product connected to the sprue material.

[0010] Furthermore, the upper mold core is provided with a glue inlet channel that can connect to the lower hot runner.

[0011] Furthermore, the upper template has a through-hole for opening a glue inlet channel that connects to the glue inlet channel.

[0012] Furthermore, the lower template is recessed with a lower mounting groove, and the lower mold core is installed in the lower mounting groove. The upper template is recessed with an upper mounting groove, and the upper mold core is installed in the upper mounting groove. The lower mounting groove has lower sliding grooves recessed on opposite sides that communicate with the lower mounting groove. The sliding component is slidably disposed in the lower sliding groove and partially extends out of the lower sliding groove. The upper mounting groove has upper sliding grooves recessed on opposite sides that communicate with the upper mounting groove. The sliding component, partially extending out of the lower sliding groove, is slidably disposed in the upper sliding groove.

[0013] Furthermore, the lower mold core is recessed with a lower expansion groove communicating with the lower sliding groove, and at least a portion of the slide assembly can slide into the lower expansion groove; the upper mold core is recessed with an upper expansion groove communicating with the upper sliding groove, and at least a portion of the slide assembly can slide into the upper expansion groove.

[0014] Furthermore, the anti-stick injection mold also includes a runner plate, which is located above the upper mold plate and can slide vertically relative to the upper mold plate. A shovel base is installed on the lower surface of the runner plate, and the shovel base passes through the through groove of the upper mold plate and cooperates with the sliding assembly to drive the sliding assembly to reciprocate in the horizontal direction.

[0015] Furthermore, a T-shaped slider is installed at the lower end of the shovel base at an angle, and a T-shaped groove is opened at an angle corresponding to the T-shaped slider of the positioning component, and the T-shaped slider slides within the T-shaped groove.

[0016] The anti-stick injection mold provided by this utility model, through the cooperation of the rubber plug and the rubber plug sleeve, effectively keeps the upper mold core and the lower mold core firmly connected when the sliding component slides outward during mold opening. This ensures that the product's appearance surface separates from the sliding component in only one direction before the upper and lower mold plates separate. At this time, the rubber plug moves vertically along the rubber plug sleeve, causing the product to detach from the upper mold core while remaining on the lower mold core. This avoids the product's appearance surface from being simultaneously stuck to the sliding component and the upper / lower mold core at the parting line, preventing the product's appearance surface from separating in two directions and causing tearing or deformation at the parting line. Therefore, the anti-stick injection mold provided by this utility model not only has a simple structural design but also effectively prevents product appearance surface deformation or tearing during demolding, thereby greatly improving the product yield. Attached Figure Description

[0017] Figure 1 This is a perspective view of an anti-stick injection mold according to the present invention.

[0018] Figure 2 for Figure 1 The diagram shown is a three-dimensional exploded view of part of the structure of the anti-stick injection mold.

[0019] Figure 3 This is a perspective view of the upper and lower templates of this utility model in the closed state.

[0020] Figure 4 for Figure 3 A three-dimensional view showing the mold opening state of the upper and lower templates.

[0021] Figure 5 for Figure 4 The enlarged view of part A of the anti-stick injection mold shown.

[0022] Figure 6 This is a schematic diagram of the upper template of this utility model.

[0023] Figure 7 for Figure 6 A magnified view of point C on the upper template shown.

[0024] Figure 8 This is a schematic diagram of the mold-closing state of the lower template of this utility model.

[0025] Figure 9 for Figure 8 A magnified view of part B of the lower template shown.

[0026] Figure 10 This is a schematic diagram of the combination of the shovel base and the positioning component of this utility model.

[0027] Figure 11 for Figure 10 A magnified view of point D of the shovel base and row assembly shown.

[0028] Figure 12 This is a schematic diagram of the product injection molded from the anti-stick mold of this utility model. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0032] Please see Figures 1-12 This utility model discloses an anti-stick injection mold for injection molding of TPU material, including an upper mold plate 20 and an upper mold core 50, a lower mold plate 10 and a lower mold core 30 mounted on the lower mold plate 10, and sliding components 40 located on opposite sides of the upper mold core 50 and the lower mold core 30. The upper mold plate 20 and the lower mold plate 10 are vertically distributed, and the sliding components 40 slide horizontally along the anti-stick injection mold. The upper mold core 50, the lower mold core 30 and the sliding components 40 together form a cavity for molding product 100. The upper mold plate 20 and the lower mold plate 10 are respectively provided with mutually cooperating rubber plug sleeves 60 and rubber plugs 70. The inner diameter of the rubber plug sleeve 60 is the same as the outer diameter of the rubber plug 70, and the rubber plug sleeve 60 and the rubber plug 70 are distributed on the outer periphery of the upper mold core 50 and the lower mold core 30.

[0033] When the mold is opened, the sliding components 40 located on both sides of the upper mold core 50 and the lower mold core 30 slide horizontally in opposite directions to separate from the upper mold core 50 and the lower mold core 30. After the product 100 in the cavity is completely separated from the sliding components 40, the upper mold core 50 moves away from the lower mold core 30 until the rubber plug 70 is separated from the rubber plug sleeve 60, and finally the product 100 is ejected to complete the demolding action.

[0034] Please see Figure 5 , Figure 9 and Figure 12 The sliding component 40 has a side forming groove 41 recessed on the end face near the upper mold core 50 and the lower mold core 30, and the outer surface 101 of the product 100 is formed in the side forming groove 41.

[0035] Please see Figure 5 , Figure 7 and Figure 9 The lower mold core 30 is recessed with a lower molding groove 32 that communicates with the side molding groove 41, and the upper mold core 50 is recessed with an upper molding groove 53 that communicates with the side molding groove 41. The lower molding groove 32, the upper molding groove 53, and the side molding groove 41 together form the cavity for molding the product, and the product 100 is formed in the cavity.

[0036] Please continue reading. Figure 5 , Figure 7 and Figure 9 The lower mold core 30 has a recessed lower hot runner 31 on its upper surface, which is connected to the lower molding groove 32. The upper mold core 50 has a recessed upper hot runner 52 on its lower surface, which is connected to the upper molding groove 53. When the mold is closed, the upper hot runner 52 and the lower hot runner 31 close together to form a hot runner pipe. The molten TPU material flows through the hot runner pipe into the cavity and is formed into the product 100 in the cavity.

[0037] Please see Figure 9 The lower mold core 30 has a vertically penetrating ejector pin hole 33. The port of the ejector pin hole 33 is located on the horizontal extension path of the lower hot runner 31 and is connected to the lower hot runner 31. An ejector pin is movably installed in the ejector pin hole 33. The ejector pin is used to eject the sprue material and the product 100 connected to the sprue material.

[0038] Please see Figure 6 The upper mold core 50 has a through-hole opening with a glue inlet channel 51 that can connect to the lower hot runner 31. When the mold is closed, the molten TPU material is injected into the lower hot runner 31 from the glue inlet channel 51, and flows from the lower hot runner 31 into the upper hot runner 52. The lower hot runner 31 and the upper hot runner 52 close together to form a hot runner, and finally enter the cavity.

[0039] Please see Figure 4 Furthermore, the upper template 20 is provided with an injection channel 23 that connects to the injection channel 51. During injection, the molten TPU material enters the injection channel 51 from the injection channel 23.

[0040] Please see Figure 4 and Figure 6The lower template 10 is recessed with a lower mounting groove 11, and the lower mold core 30 is installed in the lower mounting groove 11. The upper template 20 is recessed with an upper mounting groove 21, and the upper mold core 50 is installed in the upper mounting groove 21. The lower mounting groove 11 has lower sliding grooves 12 recessed on opposite sides, communicating with the lower mounting groove 11. The sliding component 40 is slidably disposed in the lower sliding groove 12, and the sliding component 40 extends upward from the lower sliding groove 12. The upper mounting groove 21 has upper sliding grooves 24 recessed on opposite sides, communicating with the upper mounting groove 21. The sliding component 40, which extends partially from the lower sliding groove 12, is slidably disposed in the upper sliding groove 24. Furthermore, the lower mold core 30 is recessed with a lower expansion groove 34 that communicates with the lower sliding groove 12, and at least a portion of the sliding component 40 can slide horizontally to the lower expansion groove 34; the upper mold core 50 is recessed with an upper expansion groove 54 that communicates with the upper sliding groove 24, and at least a portion of the sliding component 40 can slide horizontally to the upper expansion groove 54.

[0041] Please see Figure 1 , Figure 2 , Figure 10 and Figure 11 The anti-stick injection mold further includes a runner plate 80, which is located above the upper mold plate 20 and can slide vertically relative to the upper mold plate 20. A spade base 81 is installed on the lower surface of the runner plate 80. The spade base 81 passes through the through groove 25 of the upper mold plate 20 and cooperates with the sliding assembly 40 to drive the sliding assembly 40 to reciprocate horizontally. A T-shaped slider 83 is installed at the lower end of the spade base 81. The T-shaped slider 83 is inclined downward from the mounting end to the free end. The sliding assembly 40 has a T-shaped groove 42 inclinedly opened corresponding to the T-shaped slider 83. The T-shaped slider 83 slides within the T-shaped groove 42. In this embodiment, the runner plate 80 drives the spade base 81 to move vertically, and the T-shaped slider 83 installed on the spade base 81, due to its inclined setting, drives the sliding assembly 40 to move inward or outward horizontally.

[0042] Please continue reading. Figure 11 A wear-resistant block 82 is installed between the T-shaped slider 83 and the shovel base 81. The wear-resistant block 82 abuts against the sliding assembly 40, which reduces the wear of the shovel base 81 and the sliding assembly 40, thereby increasing their service life and facilitating later mold repair and maintenance. Furthermore, the shovel base 81 is recessed with a fixing groove 811 for installing the wear-resistant block 82. The wear-resistant block 82 is fixedly installed in the fixing groove 811. In this embodiment, the wear-resistant block 82 is installed at an angle in the fixing groove 811 to facilitate the tilting of the wear-resistant block 82 to push the sliding assembly 40.

[0043] Furthermore, the flow channel plate 80 is provided with a glue inlet communicating with the glue inlet channel 23 of the upper template 20. Molten TPU material enters the glue inlet channel 23 from the glue inlet to inject molten TPU material into the anti-stick injection mold.

[0044] Please see Figure 4 , Figure 6 and Figure 8 The upper template 20 and the lower template 10 are respectively provided with a positioning post 22 and a positioning hole 13 that cooperate with each other. The outer diameter of the positioning post 22 is the same as the inner diameter of the positioning hole 13, and the positioning post 22 is vertically slidable inside the positioning hole 13.

[0045] When using this utility model:

[0046] When the anti-stick injection mold changes from the open state to the closed state, firstly, the upper mold plate 20 drives the upper mold core 50 to move towards the lower mold plate 10, and the rubber plug 70 on the lower mold plate 10 extends into the rubber plug sleeve 60 until the upper mold core 50 and the lower mold core 30 are in contact with each other. At this time, the upper forming groove 53 and the lower forming groove 32 are closed vertically, and the upper hot runner 52 and the lower hot runner 31 are closed to form a hot runner pipe; then, the runner plate 80 drives the spade base 81 to move towards the upper mold plate 20, and the mold core 81 is closed. The T-shaped slider 83 mounted on the lower end of the shovel base 81 slides along the T-shaped groove 42 and pushes the sliding components 40 located on opposite sides of the upper mold core 50 and the lower mold core 30 to slide horizontally towards each other until the end face of the sliding component 40 is attached to the side wall of the upper mold core 50 and the lower mold core 30. At this time, the side molding groove 41, together with the mutually closed upper molding groove 53 and lower molding groove 32, forms the cavity, and one end of the cavity is connected to the hot runner so that molten TPU material can be injected into the cavity through the hot runner.

[0047] After the product 100 is formed in the cavity, the anti-stick injection mold changes from the closed state to the open state. First, the runner plate 80 drives the spade base 81 to move away from the upper mold plate 20. The T-shaped slider 83 installed at the lower end of the spade base 81 slides along the T-shaped slide groove 42 and pulls the sliding assembly 40 located on opposite sides of the upper mold core 50 and the lower mold core 30 to slide horizontally in opposite directions to separate from the upper mold core 50 and the lower mold core 30, so that the outer surface 101 of the product 100 in the cavity is completely separated. The slide assembly 40 is disengaged; then, the runner plate 80 drives the upper mold plate 20 to move synchronously away from the lower mold plate 10, and the upper mold plate 20 drives the upper mold core 50 to move away from the lower mold core 30 until the rubber plug 70 is disengaged from the rubber plug sleeve 60. At this time, the product 100 and the sprue are located in the lower forming groove 32 and the lower hot runner 31 respectively; finally, the ejector pin moves upward along the ejector pin hole, ejecting the sprue and the product 100 formed on the sprue, thereby successfully completing the demolding action.

[0048] The anti-stick injection mold provided by this utility model, through the cooperation of the rubber plug 70 and the rubber plug sleeve 60, effectively maintains the upper mold core 50 and the lower mold core 30 in stable contact when the sliding component 40 slides outward during mold opening. This ensures that the outer surface 101 of the product 100 separates from the sliding component 40 only in one direction first, and then the upper mold plate 20 and the lower mold plate 10 separate. At this time, the rubber plug 70 moves vertically along the rubber plug sleeve 60, causing the product 100 to detach from the upper mold core 50 and produce... Product 100 is retained on the lower mold core 30, thereby avoiding the simultaneous adhesion of the slide assembly 40 and the upper mold core 50 / lower mold core 30 at the parting point of the outer surface 101 of product 100, which would cause the outer surface 101 of product 100 to separate in two directions and cause tearing or deformation at the parting point of the outer surface 101. Therefore, the anti-stick injection mold provided by this utility model not only has a simple structural design, but also effectively prevents the outer surface 101 of product 100 from being deformed or torn during demolding, thereby greatly improving the yield of products.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An anti-stick injection mold for injection molding of TPU material, comprising an upper mold plate and an upper mold core mounted on the upper mold plate, a lower mold plate and a lower mold core mounted on the lower mold plate, and sliding components located on opposite sides of the upper mold core and the lower mold core, the sliding components sliding horizontally along the anti-stick injection mold, the upper mold core, the lower mold core and the sliding components together forming a cavity for product molding, characterized in that: The upper mold plate and the lower mold plate are respectively provided with mutually cooperating rubber plug sleeves and rubber plugs, and the rubber plug sleeves and rubber plugs are distributed on the outer periphery of the upper mold core and the lower mold core. When the mold is opened, the sliding components located on both sides of the upper mold core and the lower mold core slide in opposite directions to separate from the upper mold core and the lower mold core. After the product in the cavity is completely separated from the sliding components, the upper mold core moves away from the lower mold core until the rubber plug is removed from the rubber plug sleeve, and finally the product is ejected to complete the demolding action.

2. The anti-stick injection mold as described in claim 1, characterized in that: The sliding assembly has a side forming groove recessed on the end face near the upper mold core and the lower mold core. The lower mold core has a lower forming groove recessed and communicating with the side forming groove. The upper mold core has an upper forming groove recessed and communicating with the side forming groove. The lower forming groove, the upper forming groove, and the side forming groove together form the cavity for molding the product.

3. The anti-stick injection mold as described in claim 2, characterized in that: The lower mold core has a recessed lower hot runner on its upper surface, which is connected to the lower forming groove. The upper mold core has a recessed upper hot runner on its lower surface, which is connected to the upper forming groove.

4. The anti-stick injection mold as described in claim 3, characterized in that: The lower mold core has a vertically penetrating ejector pin hole. The port of the ejector pin hole is located on the path of the lower hot runner and is connected to the lower hot runner. An ejector pin is movably installed in the ejector pin hole. The ejector pin is used to eject the sprue material and the product connected to the sprue material.

5. The anti-stick injection mold as described in claim 3, characterized in that: The upper mold core has a through-hole for the injection channel that connects to the lower hot runner.

6. The anti-stick injection mold as described in claim 5, characterized in that: The upper template has a through-hole for a glue inlet channel that connects to the glue inlet channel.

7. The anti-stick injection mold as described in claim 1, characterized in that: The lower template is recessed with a lower mounting groove, and the lower mold core is installed in the lower mounting groove. The upper template is recessed with an upper mounting groove, and the upper mold core is installed in the upper mounting groove. The lower mounting groove has lower sliding grooves that communicate with it on opposite sides. The sliding component is slidably disposed in the lower sliding groove and partially extends out of the lower sliding groove. The upper mounting groove has upper sliding grooves that communicate with it on opposite sides. The sliding component that partially extends out of the lower sliding groove is slidably disposed in the upper sliding groove.

8. The anti-stick injection mold as described in claim 7, characterized in that: The lower mold core is provided with a lower expansion groove that communicates with the lower sliding groove, and at least a portion of the slide assembly can slide into the lower expansion groove; the upper mold core is provided with an upper expansion groove that communicates with the upper sliding groove, and at least a portion of the slide assembly can slide into the upper expansion groove.

9. The anti-stick injection mold as described in any one of claims 1-8, characterized in that: The anti-stick injection mold also includes a runner plate, which is located above the upper mold plate and can slide vertically relative to the upper mold plate. A shovel base is installed on the lower surface of the runner plate. The shovel base passes through the through groove of the upper mold plate and cooperates with the sliding assembly to drive the sliding assembly to reciprocate in the horizontal direction.

10. The anti-stick injection mold as described in claim 9, characterized in that: The lower end of the shovel base is inclinedly installed with a T-shaped slider, and the positioning component is inclinedly provided with a T-shaped groove corresponding to the T-shaped slider, and the T-shaped slider slides within the T-shaped groove.

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