TWI229030B - Micro hot runner system with automatic gate separation design - Google Patents

Abstract

This invention is related to a micro hot runner system with automatic gate separation design, including a micro injection module that has a set of corresponding upper-and-bottom mold halves, wherein a flow guiding mold and a cutting mold are placed in between. The flow guiding mold maintains the temperature to let injected material flow when it is proceeding injection process. And the cutting mold is equipped with a trimmer that can separate the formed products. This invention can achieve saving injection material and automatic separation of finished products.

Description

1229030 V. Description of the invention (1) [Technical field to which the invention belongs] ^ The present invention relates to a micro-hot runner system with automatic separation gate design ', especially a module that can be applied to micro-injection molding, which can greatly Reduce the waste of injection raw materials, and have the industrial benefits of automatic and independent separation of the finished product at the same time when the mold is ejected. [Previous technology] π injection molding "is the basic common sense in the related industry. Please refer to the seventh figure 'the mold 9 0 used for injection molding is composed of an upper mold 9 1 and a lower mold 9 2 and The outer edges of the corresponding surfaces of the upper and lower molds 91 and 92 simultaneously project into a runner 93 into the upper and lower molds 91 and 92. The volume of the runner 93 is set to V 5 and corresponds to The outer edges of the runners 9 3 of the lower molds 9 丨 and 9 2 branch into a plurality of approximately equal volume runners 94. The volume of one of the runners 94 is set to V 6, and the end of the runner 9 4 is formed. A mold cavity 9 5 whose volume is added to V 7 'and then at the open end of the washing channel, a plastic injection device 96' is set to let one injection of raw materials (not shown in the figure, together with Chenming) ) The plastic injection device 9 6 1 is released into the washing channel 93 by pressure, and after flowing through the washing channel 9 3 and the flow channel 94, it enters the mold cavity 95 for cooling and molding. However, the conventional structure has the following Disadvantages:

(A) Waste injection material. In terms of the conventional structure, in a mold, the total volume of the solidified injection molding material can really allow the industry to sell profitable products that are only inside the cavity, but in terms of various injection products, The size of the corresponding cavity needs to be different, for example, the volume of the cavity is set to V 7, and in the mold, the path through which the injection material flows to the cavity includes the runner and runner, and The volume of these two is V

l229〇3〇, description of the invention (2) 5, V6, the important point is that v5 plus V6 often far exceed a single V? In particular, after the finished product is cured and molded, the injection raw materials in the runner and runner are fully formed into Unusable waste, and if such a problem occurs, when the micro-product is injected, the problem that the proportion of the finished product is far less than the proportion of the waste will increase by an uncountable multiple, that is, in the conventional mold, Due to improper design for a long time, excessive injection of solidified waste is caused. When two of them are ejected from the mold, that is, after the runner, it is extremely inconsistent and therefore has disadvantages. [Invention of the micro-heat of the invention, the micro-heat of the invention, separation. B) The finished product and waste need to find π ^ and one by one yr groove μ ν ν and δ and volts r itj are distributed in the mold, then when the finished product is also connected in pairs State, and the solidified waste connected between the two finished products and f is required to be a fully automatic mold production by manual or other methods at one time in the fully-automatic finished product. The new structure, in order to overcome the above-mentioned traditional contents], f ί ί, provides an automatic separation system, which can greatly reduce the waste of injected raw materials, the purpose of ft Μ, is to provide an automatic separation system, which can At the same time when the mold is ejected, the completed mold f is automatically separated from the mold. Structure > Yao D Design 〇 Orbit Design

The present invention solves the lack of custom. A module with an automatic separation winding and a micro-injection molding module adopts the following technical solutions: A micro-hot runner system with a mouth design, the module is provided with:

1229030 V. Description of the invention (3) ----- An upper mold half runs through one end of the upper mold to form a runner. ^ $ 二 ^ The half mold is set corresponding to the upper mold half. A plurality of mold cavities are formed at one end; a plastic injection device is used to inject a raw material under pressure into the runner of the upper mold; it is characterized by a diversion mold that uses an upper surface and a lower surface to go separately Abutting with the upper and lower mold halves, the guide die is fixed and maintained in the injection processing operation so that the injection raw materials can maintain a thick heat that can be squeezed by high pressure. The guide die is provided with: (a) -The feeding recess is formed on the upper surface of the guide die corresponding to the runner, (b) a plurality of branch-shaped runners are formed by expanding outward from the feeding recess on the upper surface of the guide die; (c) A plurality of downflow channels are formed by traversing the diversion mold at predetermined intervals on the plurality of flow channels with a volume smaller than the runner to form the diameter of the plurality of downflow channels from the center of the diversion mold. Outward, the proportion f is supported from small to large. A cutting die is set corresponding to the diversion die and runs through the cut. A cutout corresponding to a plurality of downflow channels is set, and the volume of the cutout is approximately equal to the volume of the downflow channel, /; L, so that the injection raw material is maintained in the downflow channel of the module, and can be used to form a scoop, The above-mentioned objects and advantages of the present invention are achieved by the ejection of the cutting mold, which is achieved by the automatic withdrawal of the cutting mold.

Page 7 1229030 V. Detailed description of the invention (4) and the attached drawings, get a deep understanding. After: The hot-washing channel module is carried out to the runner 111 of the third figure, the half of the mold 1 2 is V 4; refer to the reference system in the following embodiments and the drawings to explain the present invention in detail. [Embodiment] This The invention is a micro-system with an automatic separation and mouthwash design, especially a module applied to micro-injection molding, and the injection molding can save more injection raw materials. Please refer to the first illustration, the module includes : One upper mold half 11 is formed across one end of the upper mold half ii, and the volume of the runner 1 1 1 is determined as v 1; the lower mold half 1 2 is set corresponding to the upper mold half 11 and the lower A plurality of mold cavities 1 2 1 are formed at one end, and the volume of the mold cavity 丨 2 1 is set by a plastic injection device 1 3, and a raw material 1 31 (as shown in the four figures) is pressurized and released into the upper mold 丨丨 sprue 丨 π; its special diversion die 1 4 is in the form of a thin plate. The diversion die 丨 4 uses an upper surface 141 and a lower surface H2 to go to the upper and lower mold η, 12 respectively. One end is closed. The guide die i 4 keeps an injection material 1 3 1 that can be squeezed by high pressure during the injection processing operation. Thickness of the heat, the guide die 14 has: (a)-the feed recess 丨 43, corresponding to the runner 丨 丨 1 is provided on the upper surface 141 of the guide die 14; (b) a plurality of The branch-shaped flow channel 44 is formed by extending outward from the feeding recess 143 on the upper surface 141 of the guide die 4; (c) a plurality of lower flow channels 145 are connected from the branch-shaped flow channel 144,

Page 8 1229030 V. Description of the invention (5) It is formed by penetrating the guide die 14 at predetermined intervals. In this embodiment, the first, second, and third downflow channels 145 A, 145 B, and 145 C are formed. For example, the ratios of the relative diameters d1, d2, and d3 are from the center of the diversion mold 14 to the outside, and the proportions vary from small to large (the preferred embodiment of the present invention is that a plurality of diameters Small to large downflow channels 1 4 5) distributed outward from the center of the guide mold 14, if the volume of the largest diameter down flow channel 1 4 5 C is V 2, the volume V 2 is much smaller than VI and V 4; A cutting die 15 is a thin plate body corresponding to the guide die 14 and penetrates the cutting die 15 to form a cutout 1 5 1 corresponding to a plurality of downflow channels 1 4 5. The volume of the cutout 151 is It is determined as V3, and the volume V3 is approximately equal to V2. This is the micro-hot runner, runner and runner structure of the micro-injection module of the present invention. The preferred embodiment of the present invention is as follows (see Figures 2 and 4 to 6 for cooperation): First, the plastic injection device 13 is used to heat the injection material 1 31 to form a liquid, and then The injection raw material 1 3 1 flows into the runner 111 of the upper mold half 11 under pressure. The injection raw material 131 flows from the runner 111 into the upper mold 11 and then flows through the runner 111 into the feed recess 1 4 3 of the guide die 14 and from the feed recess 1 4 3 to the Plural branches of flow channels 1 4 4 flow away. At this point, the flow direction of the injection raw material 131 after flowing into the plurality of runners 144 is substantially the same as that flowing into the plurality of lower runners 1 4 5 among the first to third runners 145A to 145C. In this part, due to the downstream The diameters of the channels 145A to 145 C are outward from the center of the guide die 14 in a predetermined proportion from small to large, so the injection raw material 131 flows through the channel 14 4 to the first to second

Page 9 1229030 V. Description of the invention (6) When the downflow channel 1 4 5 A to 1 4 5 C, the volume ratio flowing through it is also relatively small to at most, by controlling the flow volume of the raw material 1 3 1 thus ejected It is possible to let approximately equal injection materials 1 31 flow into the mold cavities 1 2 1 near or far from the runner 1 1 1 in about the same time. In this way, after the injection raw material 1 3 1 flows through the plurality of downflow channels 1 4 5 A to 1 4 5 C, it flows into the cutouts 5 1 of the cutting die 5 and flows into the cutouts 151 again. The cavity 12m of the lower mold half 12 is finally cooled in the cavity 12m. During the process of cooling the injection raw material 131 into the finished product 20, the temperature distribution in the entire module is approximately the upper half of the mold. It is the hottest to maintain the injection raw material 1 3 1 in a still-temperature liquid state and a diversion mold. 4 times Heat to keep the injection material 丨 3 1 in a thick state that can be squeezed by high pressure, the cutting mold i is cooled 5 times and the lower mold half 2 is the coldest state. When the finished product 20 is set, the cutting die 15 is retracted. In this way, during the ejection process of the cutting die 15, the cut 20 of the cutting die 丨 5 1 is actually used to directly and explicitly cut the finished product 20. It is cut and separated from the module. In this way, it has the benefit of speeding up 20 finished products. In more detail, the guide die is provided with a plurality of runners and a plurality of lower runners corresponding to the die cavity. During injection molding, in order to keep the injection raw material in a thick state that can be squeezed by high pressure between the flow channel and the down flow channel, let. The helium diversion die (including the runner and the runner, of course) maintains a basic thermal temperature. _ Range, so the design of the volume of the downflow channel can reduce the volume of raw materials to a minimum and flow through the guide mold. Because the module is generally used in microforming (or flow channel), the volume is much smaller than The runner and the mold allow the shot product flowing through the runner and the lower runner to be formed, so as to avoid unnecessary waste of usage.

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1229030 V. Description of the invention (7) The injection raw material between the channel and the downflow channel will always be in a usable state that can be injection molded when forming the batch of finished products. This also improves the availability of the injection raw material in the module. To the highest. Of course, a cutting die is set under the diversion die, and a cutout corresponding to the downflow channel is provided through the cutting die. The cutout allows the injection material to flow into the cavity of the lower mold, and the finished product in the cavity After molding, as long as the sheet-shaped cutting mold is retracted from the position between the guide mold and the lower mold half, it is like cutting with a cutter between the finished product and the module, which is equivalent to synchronizing the finished product before the demoulding. Independent and complete molding reduces the cutting process of the finished product by one cutting step, which greatly reduces the industrial applicability. In particular, the volume of the cutout is equivalent to the volume of the downflow channel, so that the solidified injection product equivalent to the flow channel portion of the conventional module that has to be discarded can be minimized, and the production cost is effectively reduced. . And, the diameter of the plurality of downflow channels is sequentially predetermined from small to large from the center of the diversion die. Of course, the cutout is also in a corresponding state such that the volume and volume of the injected raw material are controlled. No matter it is the nearest or the farthest mold cavity, about the same amount of injection material can flow into the same time, which can improve the quality of the micro-injected product. Of course, in order to make the present invention more practical in application, the branch-shaped flow passage 144 and the plurality of lower flow passages 145 may be directly formed on the upper mold half n, or they may be separately formed on the upper mold half in a corresponding state. Between the die 丨 丨 and the diversion die 14, so that the invention can be elastically changed according to different application ranges. In addition, the division of the plurality of lower flow channels 145 on the branched flow channel 144

1229030 V. Description of the invention (8) The state of the cloth varies, except that the first to third downflow channels 1 4 5 A, 145 B, and 145 C are provided on the linear flow channel 144 at predetermined intervals, as described in the previous example. As shown in the three figures, there are also a fourth downflow channel 1 4 5 D and a first downflow channel 1 4 5 A and 1 4 5 B directly from the first and second down flow channels 1 44 on the flow channel 1 44 at predetermined intervals. Design of the fifth downflow channel 1 4 5 E. Or, the branching state is changed, and the second and third downflow channels 145 3 and 145 (: are directly divided from the first downflow channel 145 A at a predetermined distance on the flow channel 1 44 and The fourth and fifth downflow channels 145 D and 145 E are respectively arranged on the second and third downflow channels 145B and 145C, and the fourth and fifth downflow channels 145 D and 145 E are further connected by the runner 144, and on the runner 144, a sixth lower runner 145F and a fourth lower runner 145F and 1 4 5 E are extended respectively. The seventh downflow channel 145G, and an eighth downflow channel 1 4 5 以 is extended at a predetermined distance between the fourth and fifth downflow channels 1 4 5 D and 1 4 5 E. In addition, others are easy to consider and easy to implement. The branch states that are not disclosed in this article should belong to the protection scope of the present invention. The advantages of the present invention over the conventional users are as follows: (A) A large amount of injection raw materials can be saved. Between the mold halves, a diversion die and a cutting die are provided, and the diversion die and the cutting die form a plurality of downflow channels and cutouts corresponding to the cavity, especially The volume of the single downflow channel and the cutout is much smaller than the volume of the single / mold cavity or even the runner of the module, so as to 'minimize the flow of injection raw materials inside the module outside the cavity, which is to save One of the ways of injecting the raw materials; In addition, 'keep the deflector and its downflow channel at a predetermined heat temperature to make the injection

Page 12 1229030 V. Description of the invention (9) The raw materials can maintain the design of the mold cavity or the runner which can be squeezed out of the mold cavity portion of the module at a high rate; again at each step The intermediate (B) automated finished flow mold is separated from the lower mold half, and the finished mold is ejected from the diversion mold and the lower mold core group is cut and separated in the same way, so that the finished product is ejected from the mold. The industrial utilization. The thicker shape of ′ is to increase the utilization rate of injection raw materials; in addition, the volume of the cutout is much smaller, which reduces the waste after injection molding, and reduces the cost of injection raw materials. forming. The cutting mold is set in the guide molding, as long as the sheet-shaped cutting space is used as a cutting knife on the finished product, and then the finished product is separated by one step before demolding, which greatly improves the design of the present invention.

$ J μ is also the production of 7 Feng Feng ancient, i, go to Ming Mingcheng two, but only by the preferred embodiment details: without any simple modifications and changes made from the heart, ίDetailed 5 children's name can make those who are familiar with this art clearly prepare the machine and can indeed achieve the aforementioned purpose. After the month of the apricot, the present invention applies. Bay has already issued the provisions of the Patent Law

Page 1229030 Brief description of the drawings [Simplified illustration of the drawings]: The first diagram is an exploded view of the present invention, the second diagram is a part of the present invention, the third diagram is a part of the present invention, and the fourth diagram is an application of the present invention. Shooting the fifth picture is the application of the present invention. Shooting the sixth picture is the finished product of the invention. The seventh picture is the implementation of the conventional device. Upper half mold 11 Lower half mold 1 2 Plastic injection device 13, 96 Diversion mold 1 4 Lower surface 142 Flow channel 144 First downflow channel 145 A Third downflow channel 1 4 5 C Fifth downflow channel 145 E Seventh downflow channel 145 G Cutting mold 1 5 Finished product 2 0 Upper mold 91 flow channel 9 4 Volume V 1, V 2 , V 3, a partial cross-sectional view of the diameters dl, d2, and d3. The top view is an enlarged view of the molding process. The drawing of the molding process. The drawing of the mold. Schematic illustration of the mold ejection. Raw material 1 3 1 Upper surface 141 Feed recess 1 4 3 Downflow channel 1 4 5 Second downflow channel 145 B Fourth downflow channel 145 D Sixth downflow channel 145 F Eighth downflow channel 145 切口 Notch 1 5 1 Mold 90 Lower mold 92 cavity 95 V4, V5, V6, V7

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Claims (1)

1229030 VI. Scope of patent application 1 · A runner with diversion, upper half and lower half to form a plurality of plastic molds, a diversion flow, the lower half mold maintains the degree of allowance, the upper surface of the guide (a) (b ) Of the feed cavity (c) The plurality of molds are automatically divided into forming molds, longitudinal molds, and a series of cavity injection equipment: its special molds, close together, injection of the micro-hot runner system designed from the original gate. It includes a module, which is provided with the "^ end" of the upper half mold forming a > Yao Dao; corresponding to the upper half mold setting, the end of the lower half mold is an injection of raw material plus Pressure injection into the upper half of the system consists of: using an upper surface and a lower surface to go to the upper and lower guide molds respectively in the injection processing operation, and the fixed material maintains a thick hot flow mold that can be squeezed by high pressure. : A feeding recess is formed by a plurality of branch-shaped runners in the guide die corresponding to the runner, and is formed by expanding outward from the upper surface of the guide die; a plurality of lower runners are smaller than the The volume of the runner is formed on the runner through the guide die at predetermined intervals to form 5 The diameter of the runner is set from the center of the guide die outward to a large ratio. A cutting die is set corresponding to the guide die. A cutout corresponding to the lower runner is set through the cut die. The volume of the cutout is approximately equal to the volume of the channel; the injection raw material is maintained in the downflow channel of the module, and the mold is ejected from the cutting mold to achieve automatic automatic placement and a plurality of numbers in the downstream, thereby forming the 1229030 VI. Patent-type independent finished products. 2. The micro thermal bypass system with an automatic separation gate design as described in item 1 of the scope of the patent application, wherein the plurality of runners and the lower runners are formed at the other end of the upper mold half. 3. The micro-hot runner system with an automatic separation gate design as described in item 1 of the scope of the patent application, wherein the plurality of runners and the lower runners are respectively formed at the other end of the upper mold half and The upper surface of the guide die. Page 16