Inverted hot runner system mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an inverted hot runner system mold. According to the technical scheme, the inverted hot runner system mold comprises an upper mold base plate, an upper mold forming cavity plate, a lower mold forming cavity plate and a base which are sequentially arranged from top to bottom, a cavity is defined by the upper mold base plate, the upper mold forming cavity plate and the lower mold forming cavity plate, and an oil ejection system used for ejecting a product is arranged in the base. An oil cylinder is connected between the oil jacking system and the base, a hot runner system is installed at the bottom of the base, and a glue outlet of the hot runner system extends into the cavity. The utility model provides an inverted hot runner system mold capable of reliably ejecting a product.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and particularly relates to an inverted hot runner system mold. Background Technique

[0002] Injection molding is a method for manufacturing industrial product shapes. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding, compression molding, and die-casting methods. An injection molding machine (referred to as an injection machine or an injection molding machine for short) is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting materials. Injection molding is achieved through an injection molding machine and a mold.

[0003] For the production of plastic stools, to achieve large-scale mass production, it is necessary to use better injection molds for stool injection molding. However, the existing plastic stool injection molds are generally made with simple tools. This production method has low production efficiency, and due to the simplicity of the molds, it is difficult to meet the production standards for the quality of injection molded parts, cannot meet industrialized mass production requirements, and is thus not conducive to people's use.

[0004] The patent with the application number 202221421419.0 discloses a plastic stool injection mold. It includes an injection mold bottom plate, the bottom plate cavity is located on the side of the base core, a side fixing groove is provided on the side of the injection mold bottom plate, an injection mold top plate is provided on the side of the injection mold bottom plate, an injection cavity is provided on the side of the injection mold top plate, and an edge fixing groove is provided on the side of the injection mold top plate. The utility model fixes the stool main body core through the injection mold bottom plate and the injection mold top plate, so that the cavity inside the injection mold top plate and the base core in the injection mold bottom plate cooperate with the stool main body core to form a complete stool injection molding cavity for injection molding, thereby quickly manufacturing a stool workpiece with relatively precise dimensions. Moreover, this mold has a fast molding speed and high molding quality, meeting the industrialized mass production requirements of users and facilitating people's use.

[0005] However, the operation of ejecting the stool product by the above-mentioned plastic stool injection mold is relatively complex, and it is impossible to make each position of the stool receive uniform force according to the shape of the stool, which easily causes deformation of the stool product. Summary of the Utility Model

[0006] In order to solve the above problems existing in the prior art, the purpose of the present utility model is to provide an inverted hot runner system mold that can reliably eject products.

[0007] The technical solution adopted by the present utility model is as follows:

[0008] An inverted hot runner system mold, comprising an upper die backing plate, an upper die forming cavity plate, a lower die forming cavity plate and a base which are arranged in sequence from top to bottom. The upper die backing plate, the upper die forming cavity plate and the lower die forming cavity plate enclose a cavity. An oil jacking system for ejecting products is arranged in the base. An oil cylinder is connected between the oil jacking system and the base. A hot runner system is installed at the bottom of the base, and the glue outlet of the hot runner system extends into the cavity.

[0009] In the upper die backing plate, the upper die forming cavity plate and the lower die forming cavity plate of the utility model enclose a cavity, and the hot runner system can inject raw materials into the cavity. During demoulding, under the condition that the base and the lower die forming cavity plate do not move relatively, several ejector pins of the oil jacking system can extend into the cavity to evenly eject the product, ensuring reliable demoulding.

[0010] As a preferred solution of the utility model, the oil jacking system comprises an ejector plate, an ejector panel is fixed on the ejector plate. The ejector plate is arranged in the base, the oil cylinder is installed on the ejector plate, an oil cylinder base is clamped on the base, and the piston rod of the oil cylinder is connected with the oil cylinder base. When the piston rod of the oil cylinder extends, the oil cylinder pushes the whole oil jacking system to rise, so as to reliably eject the product. The oil cylinder base is arranged on the bottom plate. After hydraulic oil is injected into the oil cylinder through the oil inlet nozzle, the piston of the oil cylinder extends to drive the whole oil jacking system, thus completing the work of ejecting the product.

[0011] As a preferred solution of the utility model, several long ejector pins for jacking up the product seat plate and several short ejector pins for jacking up the product legs are fixed on the ejector panel. The long ejector pins correspond to the seat plate of the product, and the short ejector pins correspond to the legs of the product. Ejector pins are evenly arranged at each position of the product to ensure that the product can be evenly ejected and avoid the deformation of the product during the ejection process.

[0012] As a preferred solution of the utility model, several reset rods are fixed on the ejector panel, and the reset rods pass through the lower die forming cavity plate. When the mold is closed, the upper die forming cavity plate presses down the reset rods. When the mold is closed, the upper die forming cavity plate presses the reset rods to reset the oil jacking system, and the oil jacking system contacts the base again.

[0013] As a preferred solution of the utility model, several garbage nails protruding from the bottom surface of the ejector plate are connected to the bottom of the ejector plate. The garbage nails protrude from the bottom surface of the ejector plate, thereby reducing the contact area between the bottom plate and the ejector plate and forming a gap between the two, avoiding the problem of incomplete mold closing caused by chips, dust and other garbage falling on the bottom plate or the ejector plate.

[0014] As a preferred embodiment of the present utility model, the base includes a bottom plate, on which two support plates are provided. The top surface of the support plates cooperates with the bottom surface of the lower mold forming cavity plate, and the oil jacking system is arranged in the area between the two support plates on the bottom plate. The support plates are arranged between the bottom plate and the lower mold forming cavity plate, forming a space where the oil jacking system can move freely. The support plates are reliably matched with the lower mold forming cavity plate. The oil jacking system is located between the two support plates, so that the support plates can guide the oil jacking system.

[0015] As a preferred embodiment of the present utility model, a number of strengthening columns are fixed on the bottom plate. The strengthening columns pass through the oil jacking system and support the bottom surface of the lower mold forming cavity plate. A number of strengthening columns are also arranged between the two support plates to make the whole space more firm.

[0016] As a preferred embodiment of the present utility model, a number of guiding columns are connected to the bottom plate. The guiding columns pass through the oil jacking system and then extend into the lower mold forming cavity plate. The guiding columns pass through the bottom plate from the bottom, then pass through the ejector plate and the ejector panel, and then extend into the lower mold forming cavity plate to play a guiding role.

[0017] As a preferred embodiment of the present utility model, a number of balance blocks are arranged on the bottom surface of the upper mold forming cavity plate to cooperate with the top surface of the lower mold forming cavity plate. Balance blocks are arranged on the surface of the upper mold forming cavity plate where it is combined with the lower mold forming cavity plate, so that the upper mold forming cavity plate and the lower mold forming cavity plate are more accurate when combined.

[0018] As a preferred embodiment of the present utility model, positioning grooves are arranged at the four corners of the upper mold forming cavity plate, and positioning blocks are arranged at the four corners of the lower mold forming cavity plate. The positioning blocks are matched with the positioning grooves; positioning columns are fixed on the positioning blocks, and positioning holes communicating with the positioning grooves are arranged on the upper mold forming cavity plate. The positioning holes are matched with the positioning columns. The cooperation of the positioning blocks and the positioning grooves, and the cooperation of the positioning holes and the positioning columns can ensure the reliable combination of the upper mold forming cavity plate and the lower mold forming cavity plate.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. The upper mold backing plate, the upper mold forming cavity plate and the lower mold forming cavity plate of the present utility model enclose a cavity, and the hot runner system can inject raw materials into the cavity. During demolding, without relative movement between the base and the lower mold forming cavity plate, a number of ejector pins of the oil jacking system can extend into the cavity to evenly eject the product, ensuring reliable demolding.

[0021] 2. The long ejector pins of the present utility model correspond to the seat plate of the product, and the short ejector pins correspond to the legs of the product. Ejector pins are evenly arranged at each position of the product, ensuring that the product can be evenly ejected and avoiding deformation of the product during the ejection process.

[0022] 3. The waste nails of the present utility model protrude from the bottom surface of the ejector plate, thereby reducing the contact area between the bottom plate and the ejector plate, forming a gap between the two, and avoiding the problem of incomplete mold closing caused by waste such as iron filings and dust falling on the bottom plate or the ejector plate. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 is an exploded view of the present utility model in the first direction;

[0025] Figure 3 is an exploded view of the present utility model in the second direction;

[0026] Figure 4 is a schematic structural diagram of the hot runner system;

[0027] Figure 5 is a schematic structural diagram of the base;

[0028] Figure 6 is a schematic structural diagram of the oil jack system in the first direction;

[0029] Figure 7 is a schematic structural diagram of the oil jack system in the second direction;

[0030] Figure 8 is a schematic structural diagram of the lower mold forming cavity plate;

[0031] Figure 9 is a schematic structural diagram of the upper mold forming cavity plate in the first direction;

[0032] Figure 10 is a schematic structural diagram of the upper mold forming cavity plate in the second direction;

[0033] Figure 11 is a schematic structural diagram of the upper mold backing plate;

[0034] Figure 12 is a schematic structural diagram of the panel;

[0035] Figure 13 is an assembly drawing of the base and the oil jack system;

[0036] Figure 14 is the front view of the present utility model;

[0037] Figure 15 is Figure 14 the cross-sectional view at A-A in

[0038] Figure 16 is the partial front view of the present utility model when the piston rod of the oil cylinder ejects;

[0039] Figure 17 This is a partial perspective view of the present utility model when the piston rod of the oil cylinder extends out.

[0040] In the figure: 1 - upper die backing plate; 2 - upper die forming cavity plate; 3 - lower die forming cavity plate; 4 - base; 5 - oil jacking system; 6 - oil cylinder; 7 - hot runner system; 8 - panel; 21 - balance block; 22 - positioning groove; 23 - positioning hole; 31 - positioning block; 32 - positioning post; 41 - bottom plate; 42 - support plate; 43 - reinforcing post; 44 - guide post; 45 - oil cylinder base; 51 - ejector plate; 52 - ejector panel; 53 - long ejector pin; 54 - short ejector pin; 55 - return rod; 56 - waste nail; 71 - locating ring. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0043] As Figures 1 to 17 shown, the reverse hot runner system mold of this embodiment includes a panel 8, an upper die backing plate 1, an upper die forming cavity plate 2, a lower die forming cavity plate 3, and a base 4 arranged in sequence from top to bottom. The upper die backing plate 1, the upper die forming cavity plate 2, and the lower die forming cavity plate 3 enclose a cavity. An oil jacking system 5 for ejecting the product is arranged in the base 4. An oil cylinder 6 is connected between the oil jacking system 5 and the base 4. A hot runner system 7 is installed at the bottom of the base 4, and the glue outlet of the hot runner system 7 extends into the cavity.

[0044] The upper die backing plate 1, the upper die forming cavity plate 2, and the lower die forming cavity plate 3 of the present utility model enclose a cavity, and the hot runner system 7 can inject raw materials into the cavity. During demolding, while ensuring that there is no relative movement between the base 4 and the lower die forming cavity plate 3, several ejector pins of the oil jacking system 5 can extend into the cavity to evenly eject the product, ensuring reliable demolding.

[0045] The hot runner system 7 extends to the upper part of the cavity, and the middle position of the upper part of the cavity serves as the gate point. The gate point is inside the product cavity, enhancing the aesthetics of the product. The hot runner system 7 is installed at the bottom of the base 4 and is pressed tightly by the locating ring 71. The ejection system uses the oil cylinder 6 to achieve automatic ejection of the product from the mold, thereby improving production efficiency.

[0046] Specifically, the oil ejection system 5 includes an ejection plate 51, on which an ejection panel 52 is fixed. The ejection plate 51 is arranged inside the base 4, and the oil cylinder 6 is installed on the ejection plate 51. An oil cylinder base 45 is clamped on the base 4, and the piston rod of the oil cylinder 6 is connected to the oil cylinder base 45. When the piston rod of the oil cylinder 6 extends, the oil cylinder 6 pushes the entire oil ejection system 5 to rise, thereby reliably ejecting the product. The oil cylinder base 45 is arranged on the bottom plate 41. After hydraulic oil is injected into the oil cylinder 6 through the oil inlet nozzle, the piston of the oil cylinder 6 extends to drive the entire oil ejection system 5, thus completing the product ejection work.

[0047] It should be noted that four long ejector pins 53 for lifting the product seat plate and eight short ejector pins 54 for lifting the product legs are fixed on the ejection panel 52. The long ejector pins 53 correspond to the seat plate of the product, and the short ejector pins 54 correspond to the legs of the product. Ejector pins are evenly arranged at various positions of the product to ensure that the product can be evenly ejected and prevent the product from deforming during the ejection process.

[0048] Furthermore, four reset rods 55 are fixed on the ejection panel 52, and the reset rods 55 pass through the lower mold forming cavity plate 3. When the mold is closed, the upper mold forming cavity plate 2 presses down on the reset rods 55. When the mold is closed, the upper mold forming cavity plate 2 presses on the reset rods 55 to reset the oil ejection system 5, and the oil ejection system 5 contacts the base 4 again.

[0049] Furthermore, several trash pins 56 protruding from the bottom surface of the ejection plate 51 are connected to the bottom of the ejection plate 51. The trash pins 56 protrude from the bottom surface of the ejection plate 51, thereby reducing the contact area between the bottom plate 41 and the ejection plate 51, forming a gap between the two, and preventing problems such as incomplete mold closing caused by iron filings, dust and other debris falling on the bottom plate 41 or the ejection plate 51.

[0050] Specifically, the base 4 includes a bottom plate 41, on which two support plates 42 are arranged. The top surface of the support plates 42 is matched with the bottom surface of the lower mold forming cavity plate 3. The oil ejection system 5 is arranged in the area between the two support plates 42 on the bottom plate 41. The support plates 42 are arranged between the bottom plate 41 and the lower mold forming cavity plate 3, forming a space where the oil ejection system 5 can move freely. The support plates 42 are reliably matched with the lower mold forming cavity plate 3. The oil ejection system 5 is located between the two support plates 42, so that the support plates 42 can guide the oil ejection system 5.

[0051] Furthermore, ten reinforcing columns 43 are fixed on the bottom plate 41. The reinforcing columns 43 pass through the oil jacking system 5, and the bottom surface of the lower die forming cavity plate 3 is supported by the reinforcing columns 43. A number of reinforcing columns 43 are also arranged between the two support plates 42 to make the whole space more firm.

[0052] Furthermore, four guide columns 44 are connected to the bottom plate 41. The guide columns 44 penetrate through the oil jacking system 5 and then extend into the lower die forming cavity plate 3. The guide columns 44 pass through the bottom plate 41 from the bottom, then penetrate through the ejector plate 51 and the ejector panel 52, and then extend into the lower die forming cavity plate 3 to play a guiding role.

[0053] Furthermore, a number of balance blocks 21 are arranged on the bottom surface of the upper die forming cavity plate 2 to cooperate with the top surface of the lower die forming cavity plate 3. The balance blocks 21 are arranged on the surface of the upper die forming cavity plate 2 where it is clamped with the lower die forming cavity plate 3, so that the clamping of the upper die forming cavity plate 2 and the lower die forming cavity plate 3 is more accurate.

[0054] In order to ensure reliable clamping of the upper die forming cavity plate 2 and the lower die forming cavity plate 3, positioning grooves 22 are arranged at the four corners of the upper die forming cavity plate 2, and positioning blocks 31 are arranged at the four corners of the lower die forming cavity plate 3. The positioning blocks 31 cooperate with the positioning grooves 22; positioning columns 32 are fixed on the positioning blocks 31, and positioning holes 23 communicating with the positioning grooves 22 are arranged on the upper die forming cavity plate 2. The positioning holes 23 cooperate with the positioning columns 32. The cooperation between the positioning blocks 31 and the positioning grooves 22, and the cooperation between the positioning holes 23 and the positioning columns 32 can ensure reliable clamping of the upper die forming cavity plate 2 and the lower die forming cavity plate 3.

[0055] The present utility model is not limited to the above optional embodiments. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. A mold for an inverted hot runner system, characterized in that: The invention comprises an upper die pad (1), an upper die molding cavity plate (2), a lower die molding cavity plate (3) and a base (4) which are arranged in sequence from top to bottom. The upper die pad (1), the upper die molding cavity plate (2) and the lower die molding cavity plate (3) surround a molding cavity. An oil ejection system (5) for ejecting a product is arranged in the base (4). An oil cylinder (6) is connected between the oil ejection system (5) and the base (4). A hot runner system (7) is installed at the bottom of the base (4). The glue outlet of the hot runner system (7) extends into the molding cavity.

2. The inverted hot runner system mold according to claim 1, characterized in that: The oil ejection system (5) comprises an ejection plate (51), an ejection panel (52) is fixed on the ejection plate (51), the ejection plate (51) is arranged in the base (4), the oil cylinder (6) is installed on the ejection plate (51), an oil cylinder base (45) is clamped on the base (4), and the piston rod of the oil cylinder (6) is connected to the oil cylinder base (45).

3. The inverted hot runner system mold according to claim 2, characterized in that: A plurality of long ejector pins (53) for ejecting a product seat plate and a plurality of short ejector pins (54) for ejecting a product leg are fixed on the ejection panel (52).

4. The inverted hot runner system mold according to claim 2, characterized in that: A plurality of reset rods (55) are fixed on the ejection panel (52), and the reset rods (55) pass through the lower mold forming cavity plate (3). When the mold is closed, the upper mold forming cavity plate (2) presses down the reset rods (55).

5. The inverted hot runner system mold according to claim 2, characterized in that: The bottom of the ejection plate (51) is connected to a plurality of garbage nails (56) protruding from the bottom surface of the ejection plate (51).

6. The inverted hot runner system mold according to claim 1, characterized in that: The base (4) comprises a bottom plate (41), two support plates (42) are arranged on the bottom plate (41), the top surface of the support plate (42) cooperates with the bottom surface of the lower mold forming cavity plate (3), and the oil top system (5) is arranged in the area between the two support plates (42) on the bottom plate (41).

7. The inverted hot runner system mold according to claim 6, characterized in that: A plurality of reinforcing columns (43) are fixed on the bottom plate (41), the reinforcing columns (43) pass through the oil top system (5), and the reinforcing columns (43) support the bottom surface of the lower mold forming cavity plate (3).

8. The inverted hot runner system mold according to claim 6, characterized in that: A plurality of guide columns (44) are connected to the bottom plate (41), and the guide columns (44) penetrate the oil top system (5) and extend into the lower mold forming cavity plate (3).

9. The inverted hot runner system mold according to claim 1, characterized in that: The bottom surface of the upper mold forming cavity plate (2) is provided with a plurality of balancing blocks (21) which cooperate with the top surface of the lower mold forming cavity plate (3).

10. The inverted hot runner system mold according to any one of claims 1 to 9, characterized in that: The upper mold forming cavity plate (2) is provided with positioning grooves (22) at four corners, and the lower mold forming cavity plate (3) is provided with positioning blocks (31) at four corners, and the positioning blocks (31) cooperate with the positioning grooves (22); a positioning column (32) is fixed on the positioning block (31), and a positioning hole (23) connected with the positioning groove (22) is provided on the upper mold forming cavity plate (2), and the positioning hole (23) cooperates with the positioning column (32).

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