A multi-cavity injection mold for film plugs

Abstract

The utility model relates to injection mold technical field discloses a kind of multi-cavity injection mold for film plug, including main component, including heat flow plate and hot nozzle, the hot nozzle is set in heat flow plate one side;Mounting assembly is located hot nozzle side, including mounting block and sealing element, the heat flow plate is equipped with mounting groove, the mounting block is engaged with the mounting groove, the sealing element is located in mounting groove, including fixed sleeve, deformation block, moving block, lifting block, push block and arc plate.The utility model has the beneficial effect that: the hot nozzle and shunt are installed using the mode of clamping, and sealing assembly is provided, with the pressure increase of injection molding glue flow, the sealing element is triggered to make the sealing between hot nozzle and shunt stronger, to effectively prevent plastic melt from leaking from the connecting gap, avoid the occurrence of glue leakage phenomenon, ensure the smooth progress of injection molding production.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a multi-cavity injection mold for film plugs. Background Technology

[0002] For products like film plugs, mass production is usually achieved using injection molding. In the hot runner system, the connection between the hot nozzle and the runner is typically achieved using a flange connection. The sealant is applied by the pressure of the mold plate. While this method is convenient, it is prone to leakage, which not only wastes raw materials and increases production costs but also affects the normal operation of the injection mold. Utility Model Content

[0003] In view of the problems existing in the above and / or existing multi-cavity injection molds for film plugs, this utility model is proposed.

[0004] Therefore, the problem that this utility model aims to solve is that the sealing performance of the connection between the hot nozzle and the flow channel is difficult to guarantee.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-cavity injection mold for film plugs, comprising a main body assembly including a hot runner plate and a hot nozzle, wherein the hot nozzle is disposed on one side of the hot runner plate;

[0006] The mounting assembly, located on one side of the hot nozzle, includes a mounting block and a seal. The hot runner plate has a mounting groove, and the mounting block engages with the mounting groove. The seal is located within the mounting groove and includes a fixing sleeve, a deformation block, a moving block, a lifting block, a push block, and an arc-shaped plate. One end of the fixing sleeve is fixed to the inner wall of the mounting groove, and the deformation block is fixed to one end of the fixing sleeve. The mounting block has a first moving groove, and the moving block slides within the first moving groove. The mounting block has a lifting groove, and the lifting block slides within the lifting groove. The mounting block has a second moving groove, and the push block slides within the second moving groove. The arc-shaped plate is fixed to one end of the push block.

[0007] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the deformable block is an elastic and high-temperature resistant metal plate.

[0008] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the number of the arc-shaped plates is four, and an annular groove is provided in the fixing sleeve, wherein the arc-shaped plates can fit into the annular groove.

[0009] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, wherein: the top of the lifting block is inclined, and the moving block is in contact with the inclined surface of the top of the lifting block.

[0010] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the bottom of the lifting block is inclined, and the push block is provided with a force-receiving groove, the shape of which corresponds to the bottom of the lifting block.

[0011] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, wherein: one end of the push block is fixed with an elastic iron sheet, and the other end of the elastic iron sheet is fixed to the inner wall of the second moving groove.

[0012] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the deformable block has a gap.

[0013] In a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the movable block is T-shaped.

[0014] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the hot runner plate is provided with a flow channel.

[0015] As a preferred embodiment of the multi-cavity injection mold for film plugs described in this utility model, the main body component further includes a fixed mold fixing plate, a cavity plate, and a feed nozzle. The fixed mold fixing plate is disposed on one side of the hot runner plate, the cavity plate is disposed on one side of the fixed mold fixing plate, a cavity is formed in the cavity plate, and the feed nozzle is disposed on one side of the hot runner plate.

[0016] The beneficial effects of this utility model are as follows: the hot nozzle and the runner are installed by snap-fit ​​and a sealing component is set. As the pressure of the injection molding material increases, the sealing component will be triggered to make the sealing between the hot nozzle and the runner stronger, thereby effectively preventing the plastic melt from leaking from the connection gap, avoiding the occurrence of glue leakage, and ensuring the smooth progress of injection molding production. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is an overall structural diagram of a multi-cavity injection mold used for film plugs.

[0019] Figure 2 This is a cross-sectional view of the hot runner plate used in a multi-cavity injection mold for film plugs.

[0020] Figure 3 This is a cross-sectional view of the hot runner in a multi-cavity injection mold used for film plugs.

[0021] Figure 4 For multi-cavity injection molds used for film plugs Figure 3 Enlarged view of the structure at point A in the middle.

[0022] Figure 5 This is a cross-sectional view of the mounting block for a multi-cavity injection mold used as a film plug.

[0023] Figure 6 For multi-cavity injection molds used for film plugs Figure 5 Enlarged view of the structure at point B in the middle.

[0024] Figure 7 For multi-cavity injection molds used for film plugs Figure 5 Enlarged view of the structure at point C. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example 1

[0029] Reference Figures 1-7 This is the first embodiment of the present invention. This embodiment provides a multi-cavity injection mold for film plugs. The multi-cavity injection mold for film plugs includes a main body component 100, including a hot runner 101 and a hot nozzle 102, with the hot nozzle 102 disposed on one side of the hot runner 101.

[0030] After injection molding, the plastic in the main runner and branch runners of a direct gate cools and solidifies, becoming waste material and causing material waste. In contrast, a hot runner gate system keeps the plastic in a molten state, and there is no solidified plastic waste in the runner after each injection cycle, thus saving raw material costs.

[0031] When using a direct gate, additional time is required to process the runner solidified material. Hot runner gates, on the other hand, do not require processing runner waste, reducing auxiliary time in the production process, shortening the injection molding cycle, and improving production efficiency. Hot runner gates can more precisely control the temperature and pressure of the plastic melt, allowing the plastic to enter the mold cavity in a more uniform state, reducing defects such as internal stress and warping deformation in the product, and improving the dimensional accuracy and surface quality of the product.

[0032] A single-cavity mold can only mold one product per injection cycle, while a multi-cavity mold can mold multiple identical or different products simultaneously in one injection cycle, greatly improving production efficiency and making it especially suitable for mass production.

[0033] Meanwhile, medical CT film plugs need to be made of biocompatible materials, which are relatively expensive. Direct gates will leave gate residue, which needs to be cut off. Using hot runners can reduce one process and improve material utilization and production efficiency. Therefore, a multi-cavity injection mold is designed to be used for the mass production of film plugs.

[0034] The hot runner system is equipped with a heating device and a temperature control system, which can precisely control the temperature of the plastic melt in the runner, keeping it in an optimal flow state, preventing the plastic from cooling and solidifying in the runner, and ensuring the smooth progress of the injection molding process. The hot runner 101 distributes the plastic melt entering from the injection molding machine nozzle evenly to each cavity 104-1 or hot nozzle 102 through the internal branch channel, ensuring that each cavity 104-1 receives a sufficient supply of plastic, realizing balanced injection of multi-cavity molds. The hot nozzle 102 can accurately inject the plastic melt into the mold cavity 104-1, control the size and position of the gate, and realize precise control of the product molding process. This is existing technology, and this solution will not be described in detail. Moreover, those skilled in the art can clearly understand the working principle.

[0035] The mounting assembly 200, located on one side of the hot nozzle 102, includes a mounting block 201 and a seal 202. The hot runner 101 has a mounting groove 101-1, and the mounting block 201 engages with the mounting groove 101-1. The mounting block 201 is cylindrical and has a through hole in the middle to facilitate the flow of molten plastic from the hot runner 101 to the hot nozzle 102. The hot runner 101 is connected to the hot nozzle 102 by the engagement of the mounting block 201 with the mounting groove 101-1 and by the pressure applied by the subsequent template.

[0036] All components of the device are made of high-temperature resistant metals to avoid the effects of high injection molding temperatures on the installation of the mounting assembly 200 and the hot nozzle 102.

[0037] The sealing element 202 is located in the mounting groove 101-1 and includes a fixed sleeve 202a, a deformable block 202b, a movable block 202c, a lifting block 202d, a push block 202e, and an arc plate 202f. One end of the fixed sleeve 202a is fixed to the inner wall of the mounting groove 101-1, and the deformable block 202b is fixed to one end of the fixed sleeve 202a. The mounting block 201 has a first movable groove 201-1, and the movable block 202c slides in the first movable groove 201-1. The mounting block 201 has a lifting groove 201-2, and the lifting block 202d slides in the lifting groove 201-2. The mounting block 201 has a second movable groove 201-3, and the push block 202e slides in the second movable groove 201-3. The arc plate 202f is fixed to one end of the push block 202e.

[0038] The seal 202 is provided to ensure the sealing between the hot runner 101 and the hot nozzle 102. The fixed sleeve 202a is used to provide stable support for the deformable block 202b. The deformable block 202b is used to trigger the seal 202 to improve the sealing performance. After the injection begins, the plastic melt will flow through the deformable block 202b and apply a certain pressure to the deformable block 202b. The deformable block 202b will expand outward under the pressure.

[0039] The first moving groove 201-1, the lifting groove 201-2, and the second moving groove 201-3 are connected.

[0040] The moving block 202c, the lifting block 202d, and the pushing block 202e are used to drive the arc plate 202f to move. The arc plate 202f moves closer to the fixed sleeve 202a and fits tightly with the fixed sleeve 202a, thereby improving the sealing between the heat flow plate 101 and the hot nozzle 102.

[0041] When the deformable block 202b is subjected to pressure and expands outward, the moving block 202c will be pushed and move towards the lifting block 202d. At this time, the lifting block 202d is squeezed by the moving block 202c and moves downward. The lifting block 202d will push the push block 202e towards the fixed sleeve 202a, thereby pushing the arc plate 202f towards the fixed sleeve 202a and tightly fitting it with the fixed sleeve 202a.

[0042] Example 2

[0043] Reference Figures 1-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0044] Specifically, the deformable block 202b is a metal plate that is elastic and resistant to high temperatures.

[0045] During injection molding, a large injection pressure is required to push the plastic to flow in the mold. The deformable block 202b is funnel-shaped. When the plastic melt flows from the runner 101-2 into the hot nozzle 102, the plastic melt will squeeze the narrow part of the deformable block 202b and apply a pushing force to the deformable block 202b. Since the deformable block 202b is elastic, the narrow part of the deformable block 202b will be pushed outward by the plastic melt, thereby pushing the moving block 202c to move along the first moving groove 201-1 towards the lifting block 202d.

[0046] Specifically, there are four curved plates 202f, and an annular groove 202a-1 is provided inside the fixing sleeve 202a, so that the curved plates 202f can fit into the annular groove 202a-1.

[0047] There are four sets of moving blocks 202c, lifting blocks 202d, and pushing blocks 202e, which correspond one-to-one with the curved plate 202f.

[0048] The inner diameter of the annular groove 202a-1 is the same as the inner diameter of the arc plate 202f. When the four arc plates 202f approach the fixing sleeve 202a and are fully fitted with the inner wall of the annular groove 202a-1, the adjacent arc plates 202f can fit tightly together. At this time, the cooperation between the four arc plates 202f and the annular groove 202a-1 improves the sealing between the fixing sleeve 202a and the mounting block 201, thereby ensuring the sealing between the heat flow plate 101 and the hot nozzle 102 and thus avoiding glue leakage.

[0049] Specifically, the top of the lifting block 202d is inclined, and the moving block 202c is in contact with the inclined surface of the top of the lifting block 202d.

[0050] By tilting the block 202b outwards to push the moving block 202c to move, the moving block 202c presses against the inclined surface of the lifting block 202d, thereby causing the lifting block 202d to move downwards.

[0051] Specifically, the bottom of the lifting block 202d is inclined, and the push block 202e has a force groove 202e-1, the shape of which corresponds to the bottom of the lifting block 202d.

[0052] In the initial state, the top of the lifting block 202d is in contact with the lifting groove 201-2, and the bottom of the lifting block 202d is still in contact with the inclined surface of the force groove 202e-1. By tilting the lifting block 202d downward, the inclined surface of the bottom of the lifting block 202d presses against the force groove 202e-1, thereby pushing the push block 202e to move towards the fixed sleeve 202a, and then causing the arc plate 202f to engage with the annular groove 202a-1.

[0053] Specifically, one end of the push block 202e is fixed with an elastic iron sheet 202g, and the other end of the elastic iron sheet 202g is fixed to the inner wall of the second moving groove 201-3.

[0054] The elastic iron sheet 202g is used to drive the push block 202e to reset. When the push block 202e moves towards the fixed sleeve 202a, the elastic iron sheet 202g will be stretched. After the injection molding is completed, the plastic melt no longer applies a pushing force to the deformable block 202b, and the deformable block 202b will return to its original funnel shape and no longer squeeze the moving block 202c. The moving block 202c will not obstruct the upward movement of the lifting block 202d. At this time, the elastic iron sheet 202g will return to its original shape and pull the push block 202e to move away from the fixed sleeve 202a. At this time, the force groove 202e-1 squeezes the bottom slope of the lifting block 202d, causing the lifting block 202d to move upward. The top slope of the lifting block 202d will squeeze the moving block 202c, thereby causing the moving block 202c to return to its initial position.

[0055] Example 3

[0056] Reference Figures 1-7 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0057] Specifically, a gap 202b-1 is provided on the deformable block 202b.

[0058] The gap 202b-1 is set to ensure that the narrower position of the deformable block 202b can expand outward under the push of the plastic melt, thereby pushing the moving block 202c to move in the direction of the lifting block 202d.

[0059] Specifically, the moving block 202c is T-shaped.

[0060] The T-shaped arrangement allows the moving block 202c to slide along the first moving groove 201-1 without separating from it.

[0061] Specifically, a flow channel 101-2 is provided inside the heat flow plate 101.

[0062] The end of the flow channel 101-2 is connected to the feed inlet of the hot nozzle 102, and the beginning of the flow channel 101-2 is connected to the feed nozzle 105.

[0063] Specifically, the main component 100 also includes a fixed mold fixing plate 103, a cavity plate 104, and a feed nozzle 105. The fixed mold fixing plate 103 is disposed on one side of the hot runner plate 101, the cavity plate 104 is disposed on one side of the fixed mold fixing plate 103, a cavity 104-1 is formed in the cavity plate 104, and the feed nozzle 105 is disposed on one side of the hot runner plate 101.

[0064] The hot runner plate 101 is connected to the fixed mold plate 103 by bolts. The fixed mold plate 103 is also connected to the cavity plate 104 by bolts. This is existing technology and will not be described in detail here. Moreover, those skilled in the art can clearly understand the working principle. The fixed mold plate 103 has a groove corresponding to the hot nozzle 102. There are two hot nozzles 102. The number of cavities 104-1 is the same as and corresponds to the number of hot nozzles 102.

[0065] The plastic melt enters the hot runner 101 from the injection molding machine feed nozzle 105, and then is distributed to each hot nozzle 102 through the flow channel 101-2 in the hot runner. The melt flowing out of the hot nozzle 102 then enters the corresponding cavity 104-1.

[0066] In use, the mounting block 201 is engaged with the mounting groove 101-1, and the hot runner plate 101, the fixed mold fixing plate 103 and the cavity plate 104 are connected by bolts.

[0067] After injection molding begins, the molten plastic flows through the deformable block 202b, compressing the narrower portion of the block and applying a pushing force. The narrower portion of the deformable block 202b expands outwards due to the molten plastic, thus pushing the moving block 202c along the first moving groove 201-1 towards the lifting block 202d. The moving block 202c compresses the inclined surface of the lifting block 202d, causing it to move downwards. The inclined surface at the bottom of the lifting block 202d compresses the force-receiving groove 202e-1. This pushes the pusher block 202e towards the fixed sleeve 202a, thereby causing the arc plate 202f to engage with the annular groove 202a-1. The four sets of arc plates 202f move towards and press against the annular groove 202a-1 simultaneously. At this time, the adjacent arc plates 202f can fit tightly together. Through the cooperation of the four arc plates 202f and the annular groove 202a-1, the sealing between the fixed sleeve 202a and the mounting block 201 is improved, thereby ensuring the sealing between the heat flow plate 101 and the hot nozzle 102, thus avoiding glue leakage.

[0068] After injection molding is completed, the plastic melt no longer exerts a pushing force on the deformable block 202b, and the deformable block 202b will return to its original funnel shape, no longer squeezing the moving block 202c. The moving block 202c will not obstruct the upward movement of the lifting block 202d. At this time, the elastic iron sheet 202g will return to its original shape and pull the push block 202e to move away from the fixed sleeve 202a. At this time, the force groove 202e-1 squeezes the bottom slope of the lifting block 202d, causing the lifting block 202d to move upward. The top slope of the lifting block 202d will squeeze the moving block 202c, thereby causing the moving block 202c to return to its initial position, without affecting the separation of the hot runner 101 and the hot nozzle 102.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-cavity injection mold for film plugs, characterized in that: include, The main component (100) includes a heat flow plate (101) and a heat nozzle (102), wherein the heat nozzle (102) is disposed on one side of the heat flow plate (101); The mounting assembly (200), located on one side of the hot nozzle (102), includes a mounting block (201) and a sealing element (202). The hot flow plate (101) has a mounting groove (101-1). The mounting block (201) engages with the mounting groove (101-1). The sealing element (202) is located within the mounting groove (101-1) and includes a fixing sleeve (202a), a deformation block (202b), a moving block (202c), a lifting block (202d), a pushing block (202e), and an arc-shaped plate (202f). One end of the fixing sleeve (202a) is fixed to the inner wall of the mounting groove (101-1). The variable block (202b) is fixed to one end of the fixed sleeve (202a). The mounting block (201) has a first moving groove (201-1). The moving block (202c) slides in the first moving groove (201-1). The mounting block (201) has a lifting groove (201-2). The lifting block (202d) slides in the lifting groove (201-2). The mounting block (201) has a second moving groove (201-3). The push block (202e) slides in the second moving groove (201-3). The arc plate (202f) is fixed to one end of the push block (202e).

2. The multi-cavity injection mold for film plugs as described in claim 1, characterized in that: The deformable block (202b) is a metal plate that is elastic and resistant to high temperatures.

3. The multi-cavity injection mold for film plugs as described in claim 1 or 2, characterized in that: There are four arc-shaped plates (202f), and an annular groove (202a-1) is provided in the fixing sleeve (202a). The arc-shaped plates (202f) can fit into the annular groove (202a-1).

4. The multi-cavity injection mold for film plugs as described in claim 3, characterized in that: The top of the lifting block (202d) is inclined, and the moving block (202c) is in contact with the inclined surface of the top of the lifting block (202d).

5. The multi-cavity injection mold for film plugs as described in claim 4, characterized in that: The bottom of the lifting block (202d) is inclined, and the push block (202e) is provided with a force groove (202e-1), the shape of which corresponds to the bottom of the lifting block (202d).

6. The multi-cavity injection mold for film plugs as described in claim 4 or 5, characterized in that: One end of the push block (202e) is fixed with an elastic iron sheet (202g), and the other end of the elastic iron sheet (202g) is fixed to the inner wall of the second moving groove (201-3).

7. The multi-cavity injection mold for film plugs as described in claim 6, characterized in that: The deformable block (202b) has a gap (202b-1).

8. The multi-cavity injection mold for film plugs as described in claim 7, characterized in that: The moving block (202c) is T-shaped.

9. The multi-cavity injection mold for film plugs as described in claim 7 or 8, characterized in that: The heat flow plate (101) has flow channels (101-2) inside.

10. The multi-cavity injection mold for film plugs as described in claim 9, characterized in that: The main component (100) further includes a fixed mold fixing plate (103), a cavity plate (104), and a feed nozzle (105). The fixed mold fixing plate (103) is disposed on one side of the hot runner plate (101), the cavity plate (104) is disposed on one side of the fixed mold fixing plate (103), a cavity (104-1) is formed in the cavity plate (104), and the feed nozzle (105) is disposed on one side of the hot runner plate (101).

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