Multi-cavity synchronous medical-grade injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a multi-cavity synchronous medical injection mold. According to the technical scheme, limiting plates are arranged on the two sides of an upper mold and a lower mold, and the upper mold and the lower mold are used for injection molding of a formed part through an upper forming cavity and a lower forming cavity; a supporting frame is installed at the top end of the upper die, a controller is installed on the upper die and located below the supporting frame, an electromagnetic valve is installed at the top end of the supporting frame, a pipeline pressure sensor is installed on one side of the supporting frame, and the electromagnetic valve is communicated with the pipeline pressure sensor through a branch pipe. The number and the position of the branch pipes are in one-to-one correspondence with those of the upper forming cavities, and the plurality of branch pipes are communicated with the feeding pipe. Precise positioning of opening and closing of the mold is guaranteed through the limiting plate, the pipeline pressure sensor monitors the pressure of the branch pipes in real time, the controller regulates and controls opening and closing of the electromagnetic valves, the pressure of the branch pipes is made to be synchronous, the consistency of multi-cavity injection molding amount is guaranteed, the quality uniformity of formed parts is improved, and the mold is suitable for efficient production of medical products.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely relates to a kind of multi-cavity synchronous medical grade injection mold. BACKGROUND

[0002] Injection molding is a method of plastic forming processing, that is, granular plastic is placed in a barrel, heated to melt and plasticize, and then pressed by a plunger or a screw to make the material in a flowing state injected into a mold of the desired shape from the nozzle at the end of the barrel to fill the mold cavity. After cooling and setting, the molded part with a certain shape is obtained by demolding.

[0003] Through retrieval, patent application No. CN202421223153.8 discloses a multi-cavity runner balanced injection mold. Although the device can shorten the cooling and solidification time of the injection molded part to some extent and improve production efficiency when in use by setting a circulating cooling pipe in cooperation with a cooling pipe, the device lacks a precise control mechanism for the feed pressure of each cavity when in use, which cannot guarantee that the injection amounts of the multiple molding cavities are exactly the same, easily leading to deviations in size, weight, and performance of the molded part, and difficult to meet the strict requirements of medical-grade products for quality uniformity. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a multi-cavity synchronous medical grade injection mold, which solves the problems raised in the background art.

[0005] The utility model solves the above technical problems by the following scheme:

[0006] A multi-cavity synchronous medical grade injection mold, comprising a lower mold, an upper mold installed above the lower mold;

[0007] The upper mold and the lower mold are provided with limit plates on both sides, and limit rods are installed at the limit plates of the upper mold and the lower mold. The upper mold is provided with a plurality of upper molding cavities, and the lower mold is provided with a plurality of lower molding cavities. The upper mold and the lower mold inject molded parts through the upper molding cavities and the lower molding cavities.

[0008] A support frame is installed at the top of the upper mold, a controller is installed below the support frame on the upper mold, an electromagnetic valve is installed at the top of the support frame, a pipeline pressure sensor is installed on one side of the support frame, the electromagnetic valve and the pipeline pressure sensor are communicated through a branch pipe, the number and position of the branch pipes correspond to the number and position of the upper molding cavities, and the plurality of branch pipes are communicated with the feed pipe.

[0009] Based on the above technical solution, the utility model can also be improved as follows.

[0010] Further, when the upper mold is lifted up and down above the lower mold, the movement direction is limited by the limiting rod and the limiting plate.

[0011] The beneficial effects of the above further scheme are:

[0012] The guiding and limiting structure formed by the limiting rod and the limiting plate can greatly improve the accuracy during the closing and opening of the upper mold and the lower mold. During the frequent opening and closing of the mold, mechanical movement inevitably has certain deviation, and the structure can effectively constrain the movement path of the upper mold, so that it strictly lifts up and down according to the predetermined direction. This ensures that the upper forming cavity and the lower forming cavity can be accurately aligned, avoids the size deviation, flash and other defects of the molded part caused by misalignment, and significantly improves the quality stability of the molded part. At the same time, the accurate guidance can also reduce the friction and collision between the molds, reduce the wear degree of the molds, prolong the service life of the molds, and thus reduce the production cost.

[0013] Further, the top end of the upper forming cavity is provided with an inlet, and the raw material enters the inlet through the feeding pipe and the branch pipe, and then enters the upper forming cavity through the inlet.

[0014] The beneficial effects of the above further scheme are:

[0015] This independent inlet design provides each upper forming cavity with a dedicated feeding channel. On the one hand, it can ensure that the raw material has a relatively stable flow rate and pressure when entering the forming cavity, avoiding the uneven feeding problem caused by multiple forming cavities sharing one feeding channel. Different forming cavities can independently and uniformly obtain raw material supply, so that the quality of each molded part is more consistent. On the other hand, when a certain inlet is blocked or has other problems, it will not affect the feeding of other forming cavities, which is convenient for timely troubleshooting and solving problems, improves production efficiency and reliability of the mold. Moreover, the design of the inlet penetrating the top end of the upper forming cavity is beneficial to the raw material entering the forming cavity in a more direct way, reducing the energy loss and flow resistance of the raw material in the conveying process, and improving the injection efficiency.

[0016] Further, the pipeline pressure sensor and the electromagnetic valve on the same branch pipe are electrically connected with the controller, the internal pressure of the pipeline is monitored through the pipeline pressure sensor, and the internal pressure of the branch pipe is regulated through the controller to control the opening and closing degree of the electromagnetic valve.

[0017] The beneficial effects of the above further scheme are:

[0018] The pipeline pressure sensor can obtain the pressure data in the branch pipe in real time and accurately, and convert it into an electrical signal to transmit to the controller. The controller compares and analyzes the preset pressure value and the actual pressure data received, quickly makes a judgment and issues an instruction to control the opening and closing degree of the electromagnetic valve. This closed-loop control method can flexibly adjust the pressure in the branch pipe according to the actual production situation to adapt to the injection molding requirements of different raw materials and the pressure changes in the molding process. For example, when the fluidity of the raw material changes or the filling condition of the molding cavity is different, the pressure can be adjusted in time to ensure the stability and reliability of the injection molding process. At the same time, accurate pressure regulation can avoid mold damage, deformation of molded parts and other problems caused by excessive pressure, and can also prevent incomplete molding caused by low pressure, thereby improving the yield of products.

[0019] Further, the controller controls the electromagnetic valves on the plurality of branch pipes to keep the internal pressures of the plurality of branch pipes synchronized, thereby ensuring that the injection amounts of the plurality of upper molding cavities and lower molding cavities are the same.

[0020] The beneficial effects of the above further scheme are:

[0021] In the multi-cavity injection molding process, the plurality of molding cavities are simultaneously injection molded. If the pressures in the branch pipes are inconsistent, it will cause differences in the injection amounts of different molding cavities, thereby causing large deviations in the size, weight and performance of the molded parts. By uniformly controlling the electromagnetic valves on the plurality of branch pipes through the controller to synchronize the pressures in the branch pipes, the same injection pressure and injection amount can be ensured for each molding cavity. This makes the plurality of molded parts produced have high consistency in quality and performance, meeting the strict requirements of medical-grade products for product quality uniformity. For the medical industry, the consistency of products is crucial, which can ensure the safety and effectiveness of products and improve the competitiveness of products in the market. At the same time, pressure synchronization control can also optimize the injection molding process, improve production efficiency, reduce the scrap rate due to inconsistent product quality, and reduce production costs.

[0022] The utility model provides a kind of multi-cavity synchronous medical-grade injection mold. It has the following beneficial effects:

[0023] The limiting plates arranged on both sides of the upper mold and the lower mold and the limiting rods installed at the limiting plates can strictly limit the moving direction of the upper mold during the lifting process of the upper mold. This ensures that the upper mold and the lower mold can be accurately aligned during the mold closing process, avoiding misalignment, thereby ensuring the dimensional accuracy and shape accuracy of the molded parts. For medical-grade products, high-precision molding is crucial and can effectively reduce the rate of defective products. Precise positioning can also reduce the wear of the mold, prolong the service life of the mold, and reduce production costs. The upper mold is provided with a plurality of upper molding cavities, and the lower mold is provided with a plurality of lower molding cavities. The design of multiple molding cavities allows the mold to simultaneously injection mold multiple molded parts. Compared with single-cavity molds, the production efficiency is greatly improved, and more products can be produced in a unit of time to meet the demand for the number of products in the medical industry.

[0024] Each upper molding cavity has a corresponding feed inlet, and the raw material enters each feed inlet through the feed pipe and the branch pipes. This independent feed channel design ensures that each molding cavity has stable and sufficient raw material supply. This avoids the uneven feeding problem that may occur when multiple molding cavities share a feed channel, making the quality of each molded part more stable. A pipe pressure sensor and an electromagnetic valve are installed on each branch pipe and are electrically connected to the controller. The pipe pressure sensor can monitor the pressure inside the branch pipe in real time, and the controller can control the opening and closing degree of the electromagnetic valve based on the monitored pressure data, thereby accurately regulating the internal pressure of the branch pipe. This pressure regulation mechanism can adapt to different injection molding process requirements, and can flexibly adjust the pressure according to the characteristics of the raw material and the design requirements of the molded part, ensuring the stability and reliability of the injection molding process. By controlling the electromagnetic valves on multiple branch pipes through the controller, the internal pressures of the multiple branch pipes can be kept synchronized. This ensures that the injection amounts of the upper molding cavities and the lower molding cavities are the same, making the quality and performance of each molded part highly consistent. In the medical field, product consistency is very important and can ensure the safety and effectiveness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. Features of the present application, both as to organization and method of operation, together with an understanding of the same, can be best understood by reference to the following detailed description, taken in connection with the accompanying drawings in which:

[0026] In the drawings:

[0027] Fig. 1 It is a left view appearance schematic diagram of the present application;

[0028] Fig. 2 It is a right view appearance schematic diagram of the present application;

[0029] Fig. 3 It is a left side view appearance schematic diagram of the upper mold of the present application;

[0030] Fig. 4 It is the upper die right side appearance view schematic diagram of the utility model.

[0031] In the drawings, the component list represented by each sign is as follows:

[0032] 1, pipeline pressure sensor;10, controller;11, limit plate;2, electromagnetic valve;3, branch pipe;4, feed pipe;5, support frame;6, upper die;601, upper forming cavity;602, feed port;7, limit rod;8, forming part;9, lower die;901, lower forming cavity. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] Please refer to Figs. 1 to 4 The embodiments provided by the utility model:

[0035] Embodiment one

[0036] The utility model provides a multi -cavity synchronous medical grade injection mould, including lower mould 9, the upper side of lower mould 9 is equipped with upper mould 6, and the both sides of upper mould 6 and lower mould 9 are equipped with limiting plate 11, and upper mould 6 and lower mould 9 are installed limiting rod 7 at limiting plate 11, when upper mould 6 is lifted in the upper side of lower mould 9, the direction of movement is limited through limiting rod 7 and limiting plate 11, and the precision in the process of closing and opening of upper mould 6 and lower mould 9 can be greatly improved in the guide limiting structure of limiting rod 7 and limiting plate 11, in the process of mould frequent opening and closing, mechanical movement inevitably can exist certain deviation, and the structure can effectively restrict the moving path of upper mould 6, and it is lifted according to the established direction strictly.This guarantees that upper forming cavity 601 and lower forming cavity 901 can be accurately aligned, avoids the dimensional deviation, flash and other defects of the formed part 8 due to misalignment, and significantly improves the quality stability of the formed part 8.Meanwhile, accurate guidance can also reduce the friction and collision between the moulds, reduce the wear degree of the moulds, prolong the service life of the moulds, thereby reducing the production cost, and a plurality of upper forming cavities 601 are arranged on the upper mould 6, a feeding port 602 is formed through the top end of the upper forming cavity 601, the raw material enters the feeding port 602 through the feed pipe 4 and the branch pipe 3, and then enters the upper forming cavity 601 through the feeding port 602.The design of the independent feeding port 602 provides a dedicated feeding channel for each upper forming cavity 601.On the one hand, it can ensure that the raw material has a relatively stable flow rate and pressure when entering the forming cavity, avoiding the uneven feeding problem caused by multiple forming cavities sharing a feeding channel.Different forming cavities can independently and uniformly obtain raw material supply, making the quality of each formed part 8 more consistent.On the other hand, when a feeding port 602 is blocked or has other problems, it will not affect the feeding of other forming cavities, facilitating timely troubleshooting and fault solving, improving production efficiency and mould reliability.Furthermore, the design of the feeding port 602 penetrating the top end of the upper forming cavity 601 is conducive to the raw material entering the forming cavity in a relatively direct manner, reducing the energy loss and flow resistance of the raw material in the conveying process, improving the injection efficiency, and the lower mould 9 is provided with a plurality of lower forming cavities 901, and the upper mould 6 and the lower mould 9 inject the formed part 8 through the upper forming cavities 601 and the lower forming cavities 901.

[0037] Example two

[0038] In order to ensure that the injection amount of the plurality of upper forming cavities 601 and lower forming cavities 901 is the same, for example, Figs. 1 to 4As shown, the utility model also includes: the top of upper mould 6 installs support frame 5, the lower side of upper mould 6 installs controller 10 in support frame 5, the top of support frame 5 installs electromagnetic valve 2, one side of support frame 5 installs pipeline pressure sensor 1, electromagnetic valve 2 and pipeline pressure sensor 1 are communicated through branch pipe 3, the number and position of branch pipe 3 and upper forming cavity 601 one to one correspondence, the pipeline pressure sensor 1 and electromagnetic valve 2 on same branch pipe 3 are electrically connected with controller 10, the inside pressure of pipeline is monitored through pipeline pressure sensor 1, and the inside pressure of branch pipe 3 is regulated and control through the opening and closing degree of controller 10 control electromagnetic valve 2, the pressure data in branch pipe 3 can be obtained in real time, accurately, and be converted into electric signal and be transmitted to controller 10. Controller 10 carries out comparative analysis according to the preset pressure value and the actual pressure data received, rapidly makes a judgement and sends out instruction to control the opening and closing degree of electromagnetic valve 2. This closed loop control mode can flexibly adjust the pressure in branch pipe 3 according to actual production situation, to adapt to the injection molding requirement of different raw materials and the pressure change in forming process. For example, when the fluidity of raw material changes or the filling condition of forming cavity is different, the pressure can be adjusted in time, guaranteeing the stability and reliability of injection molding process. At the same time, accurate pressure regulation can avoid the problems such as mould damage and deformation of forming piece 8 caused by too high pressure, and can also prevent defects such as incomplete forming caused by too low pressure, improve the yield of products, control electromagnetic valve 2 on multiple branch pipes 3 through controller 10, make the inside pressure of multiple branch pipes 3 keep synchronous, and then ensure that the injection amount of several upper forming cavities 601 and lower forming cavities 901 is same, in multi-cavity injection molding process, multiple forming cavities carry out injection molding simultaneously, if the pressure in each branch pipe 3 is inconsistent, it will lead to the difference of injection amount of different forming cavities, thereby making the size, weight and performance of forming piece 8 have large deviation. Through controller 10, the electromagnetic valve 2 on multiple branch pipes 3 is controlled uniformly, realizes the pressure synchronization of each branch pipe 3, can guarantee that each forming cavity can obtain same injection pressure and injection amount. This makes the multiple forming pieces 8 produced in quality and performance have high consistency, meet the strict requirement of medical grade products on product quality uniformity. For medical industry, the consistency of products is crucial, can guarantee the safety and effectiveness of products, improve the competitiveness of products in market. At the same time, pressure synchronous control can also optimize injection molding process, improve production efficiency, reduce the scrap rate caused by inconsistent product quality, reduce production cost, several branch pipes 3 are communicated with feed pipe 4.

[0039] Working principle:

[0040] The injection molding machine is started, and the raw materials are transported through the main feeding pipe 4 to each branch pipe 3. Since the branch pipe 3 corresponds to the upper forming cavity 601 one by one, the raw materials will enter the upper forming cavity 601 through the branch pipe 3 and enter the upper forming cavity 601 through the feeding port 602 at the top end of the upper forming cavity 601. The transportation of raw materials relies on the pressure provided by the injection molding machine to transport the molten raw materials through the pipeline system to each forming cavity. The main feeding pipe 4 serves as the main transportation channel to distribute the raw materials to each branch pipe 3, and the pressure difference and pipeline connectivity are used to ensure that the raw materials reach each upper forming cavity 601 smoothly.

[0041] During the transportation of raw materials, the pressure sensor on each branch pipe 3 monitors the internal pressure of the pipeline in real time and transmits the pressure data to the controller 10. The controller 10 compares and analyzes the preset pressure value and the actual pressure data, and then controls the opening degree of the corresponding electromagnetic valve 2. If the pressure in a certain branch pipe 3 is higher than the preset value, the controller 10 will control the electromagnetic valve 2 on the pipeline to reduce the opening degree to reduce the pressure; otherwise, the opening degree will be increased to increase the pressure. The pressure sensor uses a pressure-sensitive element to convert the internal pressure signal of the pipeline into an electrical signal and transmits it to the controller 10. The controller 10 uses closed-loop control principle, according to the feedback pressure data calculation judgment, through adjusting the opening degree of electromagnetic valve 2 to change the flow area of branch pipe 3, to realize the accurate control of the internal pressure of the pipeline.

[0042] By controlling the electromagnetic valve 2 on multiple branch pipes 3 through the controller 10, the internal pressure of the multiple branch pipes 3 is kept synchronized. In this way, under the action of pressure, the raw materials will enter each upper forming cavity 601 and the corresponding lower forming cavity 901 at the same time with the same injection amount, and after a certain time of pressure maintaining and cooling, the molded part 8 is injection molded. Multi-cavity synchronous injection is based on pressure synchronization control. The controller 10 monitors and controls the pressure of each branch pipe 3 in real time to ensure that the feeding pressure and injection amount of each forming cavity are the same. Under the same pressure and injection amount conditions, the raw materials in each forming cavity can be uniformly filled and molded, ensuring that the quality and performance of multiple molded parts 8 are highly consistent.

[0043] When the molded part 8 cools to a certain extent, the injection molding machine drives the upper mold 6 to move upwards, and through the guiding action of the guide part and the limiting structure, the upper mold 6 is accurately separated from the lower mold 9. Then, the operator uses a tool to take out the molded part 8 from the mold, completing a production process of injection molding. During the mold opening process, the guide part and the limiting structure continue to play a guiding role to ensure that the upper mold 6 smoothly rises in the predetermined direction, avoiding damage to the molded part 8 during the mold opening process. At the same time, the injection molding machine provides power to make the upper mold 6 overcome the friction between the molds and the adhesion between the molded part 8 and the mold, realizing the separation of the molds.

[0044] The basic principle and main features of the present application and the advantages of the present application are shown and described above. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0045] In addition, it should be understood that, although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A multi-cavity synchronous medical grade injection mold, comprising a lower mold (9), an upper mold (6) is installed above the lower mold (9), characterized in that: The upper mold (6) and the lower mold (9) are provided with limit plates (11) on both sides, limit rods (7) are installed at the limit plates (11) of the upper mold (6) and the lower mold (9), a plurality of upper forming cavities (601) are provided on the upper mold (6), a plurality of lower forming cavities (901) are provided on the lower mold (9), and the upper mold (6) and the lower mold (9) are injection molded into a molded part (8) through the upper forming cavities (601) and the lower forming cavities (901); A support frame (5) is installed at the top of the upper mold (6), a controller (10) is installed below the support frame (5) on the upper mold (6), an electromagnetic valve (2) is installed at the top of the support frame (5), and a pipeline pressure sensor (1) is installed on one side of the support frame (5), the electromagnetic valve (2) and the pipeline pressure sensor (1) are communicated through a branch pipe (3), the number and position of the branch pipe (3) correspond to the number and position of the upper forming cavities (601), and the plurality of branch pipes (3) are communicated with the feed pipe (4).

2. The multi-cavity synchronous medical grade injection mold of claim 1, wherein: When the upper mold (6) is lifted above the lower mold (9), the movement direction is limited by the limit rods (7) and the limit plates (11).

3. The multi-cavity synchronous medical grade injection mold of claim 1, wherein: A feed inlet (602) is provided at the top of the upper forming cavity (601), raw materials enter the feed inlet (602) through the feed pipe (4) and the branch pipe (3), and then enter the upper forming cavity (601) through the feed inlet (602).

4. The multi-cavity synchronous medical grade injection mold of claim 1, wherein: The pipeline pressure sensor (1) and the electromagnetic valve (2) on the same branch pipe (3) are electrically connected with the controller (10), the internal pressure of the pipeline is monitored by the pipeline pressure sensor (1), and the opening and closing degree of the electromagnetic valve (2) is controlled by the controller (10) to regulate the internal pressure of the branch pipe (3).

5. The multi-cavity synchronous medical grade injection mold of claim 1, wherein: The electromagnetic valves (2) on the plurality of branch pipes (3) are controlled by the controller (10), so that the internal pressures of the plurality of branch pipes (3) are kept synchronous, thereby ensuring that the injection amounts of the plurality of upper forming cavities (601) and the plurality of lower forming cavities (901) are the same.

Images