A demolding mechanism for an injection mold

Abstract

This utility model proposes a demolding mechanism for an injection mold, including a sprue plate connected between a top plate and a moving mold plate, the bottom end of the moving mold plate connected to a male mold core, a support plate connected between a bottom plate and a fixed mold plate, the fixed mold plate sleeved with a female mold core, and the lower part of the female mold core engaging with the support plate. The bottom plate is equipped with a demolding mechanism, which includes a first hydraulic cylinder, a toothed block, a gear, a connecting column, and a paddle. The bottom end of the support plate has a first groove with an opening facing downwards, and the top end of the bottom plate has a second groove. The first and second grooves together form a through-type slide. The toothed block is slidably disposed within the slide. The drive end of the first hydraulic cylinder is connected to the toothed block. Symmetrically arranged on both sides of the first groove are first grooves with openings facing downwards and communicating with the first groove. A gear is disposed within the first groove. The lower part of the connecting column is connected to the gear, and the upper part of the connecting column is connected to the paddle. By providing a demolding mechanism, smooth demolding is achieved. Simultaneously, the mold structure is simple and easy to operate, improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and more specifically, relates to a demolding mechanism for injection molds. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products a complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, and after cooling and solidification, obtaining the molded product. As the requirements for product assembly processes become increasingly stringent, product structures are becoming more integrated and complex, which has led to many products on the market having added many complex structures to their original foundations.

[0003] In existing technologies, for simple plastic products, linear ejection mechanisms such as ejector pins, ejector sleeves (ejector tubes), or push plates can usually achieve smooth demolding. However, with the increasing complexity of industrial product designs, many products with deep cavities, thin walls, undercuts, or extremely high surface quality requirements have emerged. Traditional linear ejection methods have exposed obvious limitations when dealing with these products: First, the ejection force is concentrated at a local point or line, which can easily lead to whitening, deformation, or even cracking of deep-cavity, thin-walled products; Second, for products with undercut structures, linear ejection will cause interference, making direct demolding impossible; Third, ejector pin marks will remain on the product surface, affecting the appearance quality; Fourth, existing molds are large in size, have high manufacturing costs, complex structures, are inconvenient to operate, affect production efficiency, and are difficult to maintain later. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned technical problems, this utility model proposes a demolding mechanism for an injection mold, including a top plate 10, a sprue plate 20, a moving mold plate 30, a male mold core 40, a female mold core 50, a fixed mold plate 60, a support plate 70, and a bottom plate 80. The sprue plate 20 is connected between the top plate 10 and the moving mold plate 30. The bottom end of the moving mold plate 30 is connected to the male mold core 40. The support plate 70 is connected between the bottom plate 80 and the fixed mold plate 60. The fixed mold plate 60 is sleeved with the female mold core 50, and the lower part of the female mold core 50 is engaged with the support plate 70. The male mold core 40 and the female mold core 50 are positioned correspondingly. After mold closing, the male mold core 40 and the female mold core 50 close together to form a cavity. Core-pulling assemblies 90 are provided on both sides of the cavity, and a core 100 is provided inside the cavity. The core-pulling assemblies 90 are connected to the core 100. A demolding mechanism 110 is provided on the base plate 80. The demolding mechanism 110 includes a first hydraulic cylinder 1101, a gear block 1102, a gear 1103, a connecting column 1104, and a lever 1105. The bottom end of the support plate 70 is provided with a downward-facing first sliding groove 120. The top of the gear 1102 is provided with a second groove 130 that matches the position of the first groove 120. The first groove 120 and the second groove 130 together form a through-type slide. The gear 1102 is slidably disposed in the slide. The first cylinder 1101 is connected to the support plate 70 through the first mounting plate 140. The driving end of the first cylinder 1101 is connected to the gear 1102. The first groove 120 is symmetrically provided with first grooves 150 on both sides, with downward openings and communicating with the first groove 120. The gear is disposed in the first groove 150. 1103, the gear 1103 meshes with the tooth block 1102, the lower part of the connecting column 1104 is connected to the gear 1103, the top end of the connecting column 1104 passes through the support plate 70 and the female mold core 50 in sequence, and the upper part of the connecting column 1104 is connected to the paddle 1105. By providing a demolding mechanism 110, damage to deep cavity, thin wall or complex structure products is effectively avoided during demolding, and smooth demolding is achieved. At the same time, the mold structure is simple and easy to operate, which improves production efficiency, and the mold manufacturing cost is low, the size is small, and it is easy to maintain later.

[0005] A demolding mechanism for an injection mold includes a top plate 10, a sprue plate 20, a movable mold plate 30, a male mold core 40, a female mold core 50, a fixed mold plate 60, a support plate 70, and a bottom plate 80. The sprue plate 20 is connected between the top plate 10 and the movable mold plate 30. The bottom end of the movable mold plate 30 is connected to the male mold core 40. The support plate 70 is connected between the bottom plate 80 and the fixed mold plate 60. The fixed mold plate 60 is sleeved with the female mold core 50, and the lower part of the female mold core 50 is connected to the mold core 40. The support plate 70 is snapped in place, and the male mold core 40 and the female mold core 50 are positioned correspondingly. After mold closing, the male mold core 40 and the female mold core 50 close together to form a cavity. Core-pulling assemblies 90 are provided on both sides of the cavity, and a core 100 is provided inside the cavity. The core-pulling assemblies 90 are connected to the core 100. A demolding mechanism 110 is provided on the base plate 80. The demolding mechanism 110 includes a first hydraulic cylinder 1101, a gear block 1102, a gear 1103, a connecting column 1104, and a lever. 1105, the bottom end of the support plate 70 is provided with a first sliding groove 120 with its opening facing downwards, and the top end of the base plate 80 is provided with a second sliding groove 130 that matches the position of the first sliding groove 120. The first sliding groove 120 and the second sliding groove 130 together form a through-type slide. The toothed block 1102 is slidably disposed in the slide. The first hydraulic cylinder 1101 is connected to the support plate 70 through a first mounting plate 140, and the driving end of the first hydraulic cylinder 1101 is connected to the toothed block 1102. 102. Symmetrically arranged on both sides of the first slide groove 120 are first grooves 150 with downward openings and communicating with the first slide groove 120. The gear 1103 is arranged in the first groove 150. The gear 1103 meshes with the tooth block 1102. The lower part of the connecting post 1104 is connected to the gear 1103. The top end of the connecting post 1104 passes through the support plate 70 and the female mold core 50 in sequence. The upper part of the connecting post 1104 is connected to the paddle 1105.

[0006] Furthermore, the top of the base plate 80 is provided with a second groove 160 with the opening facing upward and corresponding to the position of the first groove 150. A bearing 170 is connected in the second groove 160. The bottom end of the connecting column 1104 passes through the gear 1103 and is connected to the bearing 170. The bearing 170 is used to prevent the connecting column 1104 from interfering with the base plate 80 when rotating, and at the same time plays a role in rotational support.

[0007] Furthermore, a positioning ring 180 is connected to the top plate 10, and a sprue sleeve 190 is provided below the positioning ring 180. The sprue sleeve 190 is connected to the top plate 10, and a flow channel 200 is connected to the output end of the sprue sleeve 190. The output end of the flow channel 200 is connected to the cavity.

[0008] Furthermore, the cavity is provided with a through hole 210 for pulling out the core 100 on the side near the core-pulling assembly 90, and the core-pulling assembly 90 passes through the through hole 210 and connects to the core 100.

[0009] Furthermore, the fixed template 60 is provided with a third slide groove 220, and the core-pulling assembly 90 is connected in the third slide groove 220. The core-pulling assembly 90 includes a second hydraulic cylinder 901, a slider seat 902, and a connecting rod 903. The second hydraulic cylinder 901 is connected to the fixed template 60 through a second mounting plate 230. The driving end of the second hydraulic cylinder 901 is connected to the slider seat 902. The side of the slider seat 902 near the cavity is provided with a sealing element 240 that matches the position of the through hole 210. One end of the connecting rod 903 is movably sleeved with a fixing block 250, and the fixing block 250 is connected to the fixed template 60. The other end of the connecting rod 903 passes through the slider seat 902 and the sealing element 240 in sequence and is connected to one end of the core 100.

[0010] Furthermore, a support platform 260 is connected to both sides of the third slide groove 220, and a pressure block 270 is connected to the top of the support platform 260. The width of the pressure block 270 is greater than the width of the support platform 260. The pressure block 270 is slidably connected to the slider seat 902. The pressure block 270 is used to ensure that the slider seat 902 moves on the third slide groove 220 and prevents it from deviating.

[0011] Furthermore, a first guide post 280 is fixedly sleeved at the four corners of the top plate 10. The bottom end of the first guide post 280 passes through the sprue plate 20, the moving template 30, the fixed template 60, the support plate 70 and the bottom plate 80 in sequence. A first guide sleeve 290 is provided on the upper part of the first guide post 280. The first guide sleeve 290 is sleeved with the sprue plate 20 and the moving template 30, and the first guide sleeve 290 is movably sleeved with the first guide post 280.

[0012] Furthermore, a second guide post 300 is provided at the top of the base plate 80 near the first guide post 280. The top of the second guide post 300 passes through the support plate 70, the fixed template 60 and the moving template 30 in sequence. A second guide sleeve 310 is movably sleeved on the upper part of the second guide post 300. Both the moving template 30 and the fixed template 60 are sleeved with the second guide sleeve 310.

[0013] Furthermore, the front and rear ends of the moving template 30 and the fixed template 60 are connected by a limiting member 330. The limiting member 330 is provided with a first waist-shaped hole 340 and a second waist-shaped hole 350. The first waist-shaped hole 340 is connected to the moving template 30 through a limiting screw, and the second waist-shaped hole 350 is connected to the fixed template 60 through the limiting screw. The limiting member 330 is used to limit the stroke during mold opening.

[0014] Furthermore, both the moving mold plate 30 and the fixed mold plate 60 are provided with cooling pipes 360, water inlets 370 and water outlets 380. The cooling pipes 360 are placed inside the moving mold plate 30 and the fixed mold plate 60, and the water inlets 370 and the water outlets 380 are located on one side of the moving mold plate 30 and the fixed mold plate 60. The cooling pipes 360, the water inlets 370 and the water outlets 380 are connected to each other, and the heat during injection molding is carried away by the circulating water flow, thereby accelerating the cooling and molding of the injection molded product.

[0015] The beneficial effects of this utility model are as follows: This utility model proposes a demolding mechanism for an injection mold, including a top plate 10, a sprue plate 20, a movable mold plate 30, a male mold core 40, a female mold core 50, a fixed mold plate 60, a support plate 70, and a bottom plate 80. The sprue plate 20 is connected between the top plate 10 and the movable mold plate 30. The bottom end of the movable mold plate 30 is connected to the male mold core 40. The support plate 70 is connected between the bottom plate 80 and the fixed mold plate 60. The fixed mold plate 60 is sleeved with the female mold core 50, and the lower part of the female mold core 50 is engaged with the support plate 70. The male mold core 40 and the female mold core 50 are positioned correspondingly. After mold closing, the male mold core 40 and the female mold core 50 close together to form a cavity. Core-pulling assemblies 90 are provided on both sides of the cavity, and a core 100 is provided inside the cavity. The core-pulling assemblies 90 are connected to the core 100. A demolding mechanism 110 is provided on the base plate 80. The demolding mechanism 110 includes a first hydraulic cylinder 1101, a gear block 1102, a gear 1103, a connecting column 1104, and a lever 1105. The bottom end of the support plate 70 is provided with a downward-facing first sliding groove 120. The top end is provided with a second slide groove 130 that matches the position of the first slide groove 120. The first slide groove 120 and the second slide groove 130 together form a through slide. The toothed block 1102 is slidably disposed in the slide. The first hydraulic cylinder 1101 is connected to the support plate 70 through the first mounting plate 140. The driving end of the first hydraulic cylinder 1101 is connected to the toothed block 1102. The two sides of the first slide groove 120 are symmetrically provided with first grooves 150 that open downwards and penetrate the first slide groove 120. The gear 1 is disposed in the first groove 150. 103, the gear 1103 meshes with the tooth block 1102, the lower part of the connecting column 1104 is connected to the gear 1103, the top end of the connecting column 1104 passes through the support plate 70 and the female mold core 50 in sequence, and the upper part of the connecting column 1104 is connected to the paddle 1105. By providing a demolding mechanism 110, damage to deep cavity, thin wall or complex structure products is effectively avoided during demolding, and smooth demolding is achieved. At the same time, the mold structure is simple and easy to operate, which improves production efficiency, and the mold manufacturing cost is low, the size is small, and it is easy to maintain later. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a demolding mechanism for an injection mold according to the present invention.

[0017] Figure 2 This is a partial structural diagram of the demolding mechanism of an injection mold according to the present invention.

[0018] Figure 3 This is a partial structural diagram of the demolding mechanism of an injection mold according to the present invention.

[0019] Figure 4 This is a partial structural diagram of the demolding mechanism of an injection mold according to the present invention.

[0020] Figure 5 This is a partial structural diagram of the demolding mechanism of an injection mold according to the present invention.

[0021] Figure 6 This is a schematic diagram of the support plate of the demolding mechanism of an injection mold according to the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the base plate of the demolding mechanism of an injection mold according to the present invention.

[0023] Explanation of key component symbols:

[0024] Top plate 10, sprue plate 20, moving template 30, male mold core 40, female mold core 50, fixed template 60, support plate 70, bottom plate 80, core-pulling assembly 90, second hydraulic cylinder 901, slider seat 902, connecting rod 903, core 100, demolding mechanism 110, first hydraulic cylinder 1101, gear block 1102, gear 1103, connecting column 1104, paddle 1105, first slide groove 120, second slide groove 130, first mounting plate 140, first groove 150, second groove 1 60, bearing 170, positioning ring 180, sprue sleeve 190, flow channel 200, through hole 210, third slide 220, second mounting plate 230, seal 240, fixing block 250, bearing platform 260, pressure block 270, first guide post 280, first guide sleeve 290, second guide post 300, second guide sleeve 310, protective post 320, limiting component 330, first waist-shaped hole 340, second waist-shaped hole 350, cooling pipe 360, water inlet 370, water outlet 380.

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be construed as, limiting the scope of protection of this application.

[0027] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0028] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections.

[0029] Example 1

[0030] like Figure 1 The diagram shown is a schematic representation of the overall structure of a demolding mechanism for an injection mold according to this utility model; Figure 2 The diagram shown is a partial structural schematic of a demolding mechanism for an injection mold according to this utility model; as shown... Figure 3 The diagram shown is a partial structural schematic of a demolding mechanism for an injection mold according to this utility model; as shown... Figure 4 The diagram shown is a partial structural schematic of a demolding mechanism for an injection mold according to this utility model; as shown... Figure 5 The diagram shown is a partial structural schematic of a demolding mechanism for an injection mold according to this utility model; as shown... Figure 6 The diagram shown is a structural schematic of the support plate of the demolding mechanism of an injection mold according to this utility model; as shown... Figure 7 The diagram shown is a structural schematic of the base plate of the demolding mechanism of an injection mold according to this utility model.

[0031] A demolding mechanism for an injection mold includes a top plate 10, a sprue plate 20, a movable mold plate 30, a male mold core 40, a female mold core 50, a fixed mold plate 60, a support plate 70, and a bottom plate 80. The sprue plate 20 is connected between the top plate 10 and the movable mold plate 30. The bottom end of the movable mold plate 30 is connected to the male mold core 40. The support plate 70 is connected between the bottom plate 80 and the fixed mold plate 60. The fixed mold plate 60 is sleeved with the female mold core 50, and the lower part of the female mold core 50 is engaged with the support plate 70. The male mold core 40 and the female mold core 50 are positioned correspondingly. After mold closing, the male mold core 40 and the female mold core 50 close together to form a cavity. The cavity has openings on both sides. A core-pulling assembly 90 is provided, and a core 100 is provided inside the cavity. The core-pulling assembly 90 is connected to the core 100. A demolding mechanism 110 is provided on the base plate 80. The demolding mechanism 110 includes a first hydraulic cylinder 1101, a toothed block 1102, a gear 1103, a connecting column 1104, and a paddle 1105. The bottom end of the support plate 70 is provided with a first sliding groove 120 with its opening facing downward. The top end of the base plate 80 is provided with a second sliding groove 130 that matches the position of the first sliding groove 120. The first sliding groove 120 and the second sliding groove 130 together form a through-type slide. The toothed block 1102 is slidably disposed in the slide. The first hydraulic cylinder 1101 is connected to a first mounting plate 1101. Plate 140 is connected to the support plate 70. The drive end of the first hydraulic cylinder 1101 is connected to the gear block 1102. The first slide groove 120 has symmetrically arranged first grooves 150 with downward openings and communicating with the first slide groove 120 on both sides. The gear 1103 is arranged in the first groove 150. The gear 1103 meshes with the gear block 1102. The lower part of the connecting column 1104 is connected to the gear 1103. The top end of the connecting column 1104 passes through the support plate 70 and the female mold core 50 in sequence. The upper part of the connecting column 1104 is connected to the paddle 1105. After injection molding is completed, the moving mold plate 30 and the fixed mold plate 60 open the mold, and the core pulling assembly... When component 90 pulls the core 100 out of the cavity, the first hydraulic cylinder 1101 starts working, and its driving end drives the toothed block 1102 to move, which in turn drives the gear 1103 to rotate. The gear 1103 drives the connecting column 1104 to rotate, causing the paddle 1105 to rotate and push out the injection-molded product. When mold closing is required, the first hydraulic cylinder 1101 starts working, and its driving end drives the toothed block 1102 to move, which in turn drives the gear 1103 to rotate. The gear 1103 drives the connecting column 1104 to rotate, causing the paddle 1105 to rotate and reset. The core-pulling assembly 90 then pulls the core 100 into the cavity.

[0032] The top of the base plate 80 is provided with a second groove 160 with the opening facing upward and corresponding to the position of the first groove 150. A bearing 170 is connected in the second groove 160. The bottom end of the connecting column 1104 passes through the gear 1103 and is connected to the bearing 170. The bearing 170 is used to prevent the connecting column 1104 from interfering with the base plate 80 when rotating, and at the same time plays a role in rotational support.

[0033] A positioning ring 180 is connected to the top plate 10, and a sprue sleeve 190 is provided below the positioning ring 180. The sprue sleeve 190 is connected to the top plate 10, and a flow channel 200 is connected to the output end of the sprue sleeve 190. The output end of the flow channel 200 is connected to the cavity.

[0034] The bottom end of the moving template 30 is provided with a first slot with the opening facing downwards. The male mold core 40 is engaged with the first slot and fixed with screws. The top of the support plate 70 is provided with a second slot with the opening facing downwards. The lower part of the female mold core 50 is engaged with the second slot and fixed with screws.

[0035] The cavity has a through hole 210 on the side near the core-pulling assembly 90 for pulling out the core 100. The core-pulling assembly 90 passes through the through hole 210 and is connected to the core 100. When the mold is opened, the core-pulling assembly 90 pulls out the core 100 through the through hole 210 and separates it from the product. When the mold is closed, the core-pulling assembly 90 sends the core 100 into the cavity through the through hole 210.

[0036] The fixed template 60 is provided with a third slide groove 220, and the core-pulling assembly 90 is connected within the third slide groove 220. The core-pulling assembly 90 includes a second hydraulic cylinder 901, a slider seat 902, and a connecting rod 903. The second hydraulic cylinder 901 is connected to the fixed template 60 through a second mounting plate 230. The driving end of the second hydraulic cylinder 901 is connected to the slider seat 902. The slider seat 902 is provided with a sealing element 240 on the side near the cavity that matches the position of the through hole 210. One end of the connecting rod 903 is movably sleeved with a fixing block 250, and the fixing block 250 is connected to the fixed template 60. The other end of the connecting rod 903 is attached to... The second cylinder 901 connects to one end of the core 100 through the slider seat 902 and the seal 240. When the mold is opened, the second cylinder 901 operates, and its driving end drives the slider seat 902 to move, thereby causing the seal 240 to separate from the through hole 210, and also driving the connecting rod 903 to move, so that the core 100 is pulled out from the cavity and separated from the product. When the mold is closed, the second cylinder 901 operates, and its driving end drives the slider seat 902 to move, thereby causing the seal 240 to abut tightly against the through hole 210, and also driving the connecting rod 903 to move, so that the core 100 is sent into the cavity.

[0037] The third slide groove 220 is provided with a support platform 260 on both sides. The top of the support platform 260 is provided with a pressure block 270, and the width of the pressure block 270 is greater than the width of the support platform 260. The pressure block 270 is slidably connected to the slider seat 902. The pressure block 270 is used to ensure that the slider seat 902 moves on the third slide groove 220 and prevents it from deviating.

[0038] A first guide post 280 is fixedly sleeved at the four corners of the top plate 10. The bottom end of the first guide post 280 passes through the sprue plate 20, the moving template 30, the fixed template 60, the support plate 70, and the bottom plate 80 in sequence. A first guide sleeve 290 is provided on the upper part of the first guide post 280. The first guide sleeve 290 is sleeved with the sprue plate 20 and the moving template 30, and the first guide sleeve 290 is movably sleeved with the first guide post 280. The first guide sleeve 290 and the first guide post 280 are used to maintain smooth movement and precise alignment when the mold is opened or closed, and also serve as a guide.

[0039] A second guide post 300 is provided at the top of the base plate 80 near the first guide post 280. The top of the second guide post 300 passes through the support plate 70, the fixed template 60 and the moving template 30 in sequence. A second guide sleeve 310 is movably sleeved on the upper part of the second guide post 300. The moving template 30 and the fixed template 60 are both sleeved with the second guide sleeve 310. The second guide post 300 and the second guide sleeve 310 are used to assist in precise guidance and positioning when the mold is opened or closed.

[0040] The second hydraulic cylinder 901 is provided with multiple protective pillars 320 on both sides. One end of each protective pillar 320 is connected to the injection mold body and is used to support the mold body when not in operation, thus providing protection.

[0041] The moving template 30 and the fixed template 60 are connected at their front and rear ends by a limiting member 330. The limiting member 330 is provided with a first waist-shaped hole 340 and a second waist-shaped hole 350. The first waist-shaped hole 340 is connected to the moving template 30 by a limiting screw, and the second waist-shaped hole 350 is connected to the fixed template 60 by the limiting screw. The limiting member 330 is used to limit the stroke during mold opening.

[0042] Both the moving mold plate 30 and the fixed mold plate 60 are provided with cooling pipes 360, water inlets 370 and water outlets 380. The cooling pipes 360 are placed inside the moving mold plate 30 and the fixed mold plate 60. The water inlets 370 and the water outlets 380 are located on one side of the moving mold plate 30 and the fixed mold plate 60. The cooling pipes 360, the water inlets 370 and the water outlets 380 are connected to each other. The heat during injection molding is carried away by the circulating water flow, which at the same time accelerates the cooling and molding of the injection molded product.

[0043] The beneficial effects of this utility model are as follows: This utility model proposes a demolding mechanism for an injection mold, including a top plate 10, a sprue plate 20, a movable mold plate 30, a male mold core 40, a female mold core 50, a fixed mold plate 60, a support plate 70, and a bottom plate 80. The sprue plate 20 is connected between the top plate 10 and the movable mold plate 30. The bottom end of the movable mold plate 30 is connected to the male mold core 40. The support plate 70 is connected between the bottom plate 80 and the fixed mold plate 60. The fixed mold plate 60 is sleeved with the female mold core 50, and the lower part of the female mold core 50 is engaged with the support plate 70. The male mold core 40 and the female mold core 50 are positioned correspondingly. After mold closing, the male mold core 40 and the female mold core 50 close together to form a cavity. Core-pulling assemblies 90 are provided on both sides of the cavity, and a core 100 is provided inside the cavity. The core-pulling assemblies 90 are connected to the core 100. A demolding mechanism 110 is provided on the base plate 80. The demolding mechanism 110 includes a first hydraulic cylinder 1101, a gear block 1102, a gear 1103, a connecting column 1104, and a lever 1105. The bottom end of the support plate 70 is provided with a downward-facing first sliding groove 120. The top end is provided with a second slide groove 130 that matches the position of the first slide groove 120. The first slide groove 120 and the second slide groove 130 together form a through slide. The toothed block 1102 is slidably disposed in the slide. The first hydraulic cylinder 1101 is connected to the support plate 70 through the first mounting plate 140. The driving end of the first hydraulic cylinder 1101 is connected to the toothed block 1102. The two sides of the first slide groove 120 are symmetrically provided with first grooves 150 that open downwards and penetrate the first slide groove 120. The gear 1 is disposed in the first groove 150. 103, the gear 1103 meshes with the tooth block 1102, the lower part of the connecting column 1104 is connected to the gear 1103, the top end of the connecting column 1104 passes through the support plate 70 and the female mold core 50 in sequence, and the upper part of the connecting column 1104 is connected to the paddle 1105. By providing a demolding mechanism 110, damage to deep cavity, thin wall or complex structure products is effectively avoided during demolding, and smooth demolding is achieved. At the same time, the mold structure is simple and easy to operate, which improves production efficiency, and the mold manufacturing cost is low, the size is small, and it is easy to maintain later.

[0044] 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 this 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 demolding mechanism for an injection mold, comprising a top plate (10), a sprue plate (20), a moving mold plate (30), a male mold core (40), a female mold core (50), a fixed mold plate (60), a support plate (70), and a bottom plate (80), wherein the sprue plate (20) is connected between the top plate (10) and the moving mold plate (30), the bottom end of the moving mold plate (30) is connected to the male mold core (40), and the support plate (70) is connected between the bottom plate (80) and the fixed mold plate (60). The fixed template (60) is sleeved with the female mold core (50), and the lower part of the female mold core (50) is engaged with the support plate (70). The male mold core (40) is positioned corresponding to the female mold core (50). After mold closing, the male mold core (40) and the female mold core (50) close together to form a cavity. Core-pulling assemblies (90) are provided on both sides of the cavity, and a core (100) is provided inside the cavity. The core-pulling assembly (90) is connected to the core (100). The characteristic feature is that: The base plate (80) is provided with a demolding mechanism (110), which includes a first hydraulic cylinder (1101), a toothed block (1102), a gear (1103), a connecting column (1104), and a paddle (1105). The bottom end of the support plate (70) is provided with a first sliding groove (120) with its opening facing downwards, and the top end of the base plate (80) is provided with a second sliding groove (130) that matches the position of the first sliding groove (120). The first sliding groove (120) and the second sliding groove (130) together form a through-type slide. The toothed block (1102) is slidably disposed in the slide. The first hydraulic cylinder (1101) is connected to the first mounting plate (140) via a first mounting plate (140). The first cylinder (1101) is connected to the support plate (70), and the driving end of the first cylinder (1101) is connected to the tooth block (1102). The first groove (120) has a first groove (150) with the opening facing downward and communicating with the first groove (120) on both sides. The gear (1103) is provided in the first groove (150). The gear (1103) meshes with the tooth block (1102). The lower part of the connecting column (1104) is connected to the gear (1103). The top end of the connecting column (1104) passes through the support plate (70) and the female mold core (50) in sequence. The upper part of the connecting column (1104) is connected to the paddle (1105).

2. The demolding mechanism of the injection mold according to claim 1, characterized in that: The top of the base plate (80) is provided with a second groove (160) with the opening facing upward and corresponding to the position of the first groove (150). A bearing (170) is connected in the second groove (160). The bottom end of the connecting column (1104) passes through the gear (1103) and is connected to the bearing (170). The bearing (170) is used to prevent the connecting column (1104) from interfering with the base plate (80) when rotating, and at the same time plays a role in rotational support.

3. The ejection mechanism of an injection mold according to claim 2, characterized in that: A positioning ring (180) is connected to the top plate (10), and a sprue sleeve (190) is provided below the positioning ring (180). The sprue sleeve (190) is connected to the top plate (10), and a flow channel (200) is connected to the output end of the sprue sleeve (190). The output end of the flow channel (200) is connected to the cavity.

4. The ejection mechanism of an injection mold according to claim 3, characterized in that: The cavity has a through hole (210) on the side near the core-pulling assembly (90) for pulling out the core (100), and the core-pulling assembly (90) passes through the through hole (210) and connects to the core (100).

5. The demolding mechanism of the injection mold according to claim 4, characterized in that: The fixed template (60) is provided with a third slide groove (220), and the core-pulling assembly (90) is connected in the third slide groove (220). The core-pulling assembly (90) includes a second oil cylinder (901), a slider seat (902) and a connecting rod (903). The second oil cylinder (901) is connected to the fixed template (60) through a second mounting plate (230). The driving end of the second oil cylinder (901) is connected to the slider seat (902). The slider seat (902) is provided with a sealing element (240) on the side near the cavity that matches the position of the through hole (210). One end of the connecting rod (903) is movably sleeved with a fixing block (250). The fixing block (250) is connected to the fixed template (60). The other end of the connecting rod (903) passes through the slider seat (902) and the sealing element (240) in sequence and is connected to one end of the core (100).

6. The demolding mechanism of the injection mold according to claim 5, characterized in that: The third slide groove (220) is connected to a support platform (260) on both sides. A pressure block (270) is connected to the top of the support platform (260). The width of the pressure block (270) is greater than the width of the support platform (260). The pressure block (270) is slidably connected to the slider seat (902). The pressure block (270) is used to ensure that the slider seat (902) moves on the third slide groove (220) and prevents it from deviating.

7. The demolding mechanism of the injection mold according to claim 6, characterized in that: A first guide post (280) is fixedly sleeved at the four corners of the top plate (10). The bottom end of the first guide post (280) passes through the sprue plate (20), the moving template (30), the fixed template (60), the support plate (70), and the bottom plate (80) in sequence. A first guide sleeve (290) is provided on the upper part of the first guide post (280). The first guide sleeve (290) is sleeved with the sprue plate (20) and the moving template (30), and the first guide sleeve (290) is movably sleeved with the first guide post (280).

8. The demolding mechanism of the injection mold according to claim 7, characterized in that: The top of the base plate (80) is provided with a second guide post (300) near the first guide post (280). The top of the second guide post (300) passes through the support plate (70), the fixed template (60) and the moving template (30) in sequence. The upper part of the second guide post (300) is movably sleeved with a second guide sleeve (310). The moving template (30) and the fixed template (60) are both sleeved with the second guide sleeve (310).

9. The demolding mechanism of the injection mold according to claim 8, characterized in that: The moving template (30) and the fixed template (60) are connected at their front and rear ends by a limiting member (330). The limiting member (330) is provided with a first waist-shaped hole (340) and a second waist-shaped hole (350). The first waist-shaped hole (340) is connected to the moving template (30) by a limiting screw, and the second waist-shaped hole (350) is connected to the fixed template (60) by the limiting screw. The limiting member (330) is used to limit the stroke when the mold is opened.

10. The ejection mechanism of an injection mold according to claim 9, characterized in that: The moving template (30) and the fixed template (60) are each provided with a cooling pipe (360), a water inlet (370) and a water outlet (380). The cooling pipe (360) is placed inside the moving template (30) and the fixed template (60). The water inlet (370) and the water outlet (380) are located on one side of the moving template (30) and the fixed template (60). The cooling pipe (360), the water inlet (370) and the water outlet (380) are connected to each other. The heat during injection molding is carried away by the circulating water flow, and the cooling and molding of the injection molded product is accelerated at the same time.

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