Intensive multi-cavity runner balance and in-mold hot cutting laminated mold
By setting balancing bosses and transition cavities in the mold, the problem of unbalanced molten material entering each cavity is solved, the stability of product quality and the improvement of production efficiency are achieved, and costs are reduced.
Patent Information
- Application Number
- CN202422976565.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-04
AI Technical Summary
In existing stacked molds, when the molten material enters each cavity, the flow channels and cavities are unbalanced, resulting in reduced product molding quality and increased rejection rates.
A dense multi-cavity runner balance and in-mold hot cutting stacking mold is designed. By setting the first and second balancing bosses between the upper mold and the lower mold, a transition cavity and a balancing channel are formed to ensure that the molten material enters each stacked cavity with the same process and flow rate, thereby achieving balance between the runner and the cavity.
The method achieves balanced material flow rates in each flow channel, ensures product quality stability, reduces raw material waste, improves production efficiency, reduces energy consumption, and lowers manufacturing costs, with a wide range of applications.
Smart Images
Figure CN223419969U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mold, in particular to a dense multi-cavity flow channel balance and in-mold hot cutting laminated mold. Background Art
[0002] Disposable cutlery, forks, and spoons are made of plastic and are very popular in many settings due to their convenience. They offer the following advantages: Convenience: Disposable cutlery is extremely convenient. They are easy to carry, require no cleaning, and are ready to use, making them ideal for outdoor activities, picnics, camping, and dining out. Hygiene and Safety: Disposable cutlery, forks, and spoons are manufactured under strict hygiene controls and are discarded after use, reducing the risk of cross-contamination and ensuring safer and more hygienic food consumption. They are suitable for public places and dining venues. Cost-Effectiveness: While disposable cutlery is relatively low for a single use, in the long run, the expense and time associated with frequent cleaning and disinfection of tableware make them more economical. Applications include outdoor activities such as camping, picnics, and barbecues. Public catering: Fast food restaurants, cafeterias, and self-service restaurants. Emergency rescue and disaster relief: Disposable cutlery can serve as an emergency supply when large-scale catering facilities are unavailable for cleaning and disinfection. Home use: Disposable cutlery can be used as backup tableware for family gatherings and holiday dinners. Air transportation: Disposable tableware provided onboard reduces the burden of onboard sanitation and cleaning.
[0003] In order to improve production efficiency, multi-cavity molding is usually adopted. In the existing technology, stacked molds are used for injection molding. Stacked molds (also called multi-layer molds or composite molds) are a special plastic injection mold. Their characteristic is that the interior of the mold is composed of multiple layers, and these layers each undertake specific molding tasks; however, after stacking, the capacity and pressure of the molten material entering each cavity are different, which will affect the balance of the flow channel and the cavity, resulting in a decrease in product molding quality and an increase in the failure rate. Utility Model Content
[0004] Technical problems to be solved
[0005] The technical problem to be solved by the utility model is to provide a dense multi-cavity flow channel balance and in-mold hot cutting stacking mold that can make the molten material enter each stacking cavity with the same process and flow rate, balance each flow channel and cavity, and ensure product quality.
[0006] Technical solutions to the problem
[0007] The utility model provides a kind of dense multi-cavity runner balance and in-mold hot cutting laminated mould, including being sequentially arranged from top to bottom upper die 11, middle die 12 and lower die 13, first forming cavity is equipped between the upper die 11 with the middle die 12, second forming cavity is equipped between the middle die 12 with the lower die 13, the lower end of the upper die 11 is equipped with first balance boss 6, the upper end of the lower die 13 is equipped with the second balance boss 7 coaxial with the first balance boss 6, the first balance boss 6 and the second balance boss 7 are inserted in the sleeve hole 50 that is opened in the middle die 12;When clamping, the first balance boss 6 and the second balance boss 7 form the transition cavity that is communicated with injection port, the first balance boss 6 and the sleeve hole form the first balance passage, the first forming cavity is communicated with the transition cavity by the first balance passage, the second balance boss 7 and the sleeve hole form the second balance passage, the second forming cavity is communicated with the transition cavity by the second balance passage, and the flow and cross-sectional area of the first balance passage and the second balance passage are same.
[0008] Further, the first balance passage and the second balance passage are multiple and are circumferentially distributed.
[0009] Further, the first balance passage and the second balance passage are same in number and are alternately arranged.
[0010] Further, the first balance boss 6 and the sleeve hole are equipped with the first annular passage communicated with each first balance passage;The second balance boss 7 and the sleeve hole are equipped with the second annular passage communicated with each second balance passage.
[0011] Further, the axial height of the first balance boss 6 and the second balance boss 7 is same.
[0012] Further, the side wall of the first balance boss 6 and the second balance boss 7 is inclined surface.
[0013] Further, the inclination angle of the side wall of the first balance boss 6 and the second balance boss 7 is same.
[0014] Further, the included angle between the inclined surface and clamping direction is greater than or equal to 5 degrees and less than or equal to 15 degrees.
[0015] Further, the middle die 12 is equipped with a center seat 5, and the sleeve hole 50 is opened on the center seat 5.
[0016] Further, the side wall of the center seat 5 is provided with an annular groove 52, and the annular groove 52 and the middle die form a circular cooling channel.
[0017] Further, the first balance boss 6 comprises a first boss 62 with a large upper end and a small lower end, the upper end of the first boss 62 extends radially outward and forms a first connecting part 61, the top of the first connecting part 61 is provided with a hot nozzle mounting hole 610 for inserting a hot nozzle, the lower end of the first boss 62 is provided with a circular groove 60a, the circular groove 60a is provided with a feeding hole 600 in communication with the hot nozzle mounting hole 610 and used for feeding; the bottom surface of the first boss 62 is provided with a first flow channel groove in communication with the circular groove, one end of the first flow channel groove is in communication with the upper forming surface of the first forming cavity after passing through the side wall of the first boss 62 and the bottom surface of the first connecting part 61, and the first flow channel groove and the middle mold form the first balance channel.
[0018] Further, the first flow channel groove comprises a first flow channel groove I 60b provided on the bottom surface of the first boss 62 and in communication with the circular groove, a first flow channel groove II 60c provided on the side wall of the first boss 62 and in communication with the first flow channel groove I 60b, and a first flow channel groove III 60e provided on the bottom surface of the first connecting part 61 and in communication with the first flow channel groove II 60c.
[0019] Further, the side wall of the first boss 62 or the bottom surface of the first connecting part 61 is provided with a first annular groove 60d coaxial with the first balance boss 6 and in communication with the first flow channel groove, and the first annular groove 60d and the sleeve hole form a first annular channel.
[0020] Further, the first flow channel groove II 60c and the first flow channel groove III 60e are staggered.
[0021] Further, the second balance boss 7 comprises a second boss 72 with a small upper end and a large lower end, the lower end of the second boss 72 extends radially outward and forms a second connecting part 71, the upper bottom surface of the second boss 72 is provided with a second flow channel groove capable of being in communication with the circular groove on the first balance boss when the mold is closed, one end of the second flow channel groove is in communication with the lower forming surface of the second forming cavity after passing through the side wall of the second boss 72 and the upper bottom surface of the second connecting part 71, and the second flow channel groove and the middle mold form the second balance channel.
[0022] Further, the second flow channel groove comprises a second flow channel groove I 70a provided on the top surface of the second boss 72 and capable of being in communication with the circular groove when the mold is closed, a second flow channel groove II 70b provided on the side wall of the second boss 72 and in communication with the second flow channel groove I 70a, and a second flow channel groove III 70d provided on the upper bottom surface of the second connecting part 71 and in communication with the second flow channel groove II 70b.
[0023] Furthermore, a second annular groove 70c is provided on the side wall of the second boss 72 or the upper bottom surface of the second connecting portion 71, which is coaxial with the second balancing boss 7 and connected to the second flow channel groove, and a second annular channel is formed between the second annular groove 70c and the sleeve hole.
[0024] Furthermore, the second flow channel grooves II 70b and the second flow channel grooves III 70d are alternately arranged.
[0025] Furthermore, a first cutter group for cutting off the two ends of the first balancing channel is provided in the upper die 11 and / or a second cutter group for cutting off the two ends of the second balancing channel is provided in the lower die 13.
[0026] Furthermore, the first cutter group includes a first cutter I for cutting off the connection between the first balancing channel and the transition cavity, and a first cutter II for cutting off the connection between the first balancing channel and the first forming cavity.
[0027] Furthermore, the second cutter group includes a second cutter I 92 for cutting off the connection between the second balancing channel and the transition cavity, and a second cutter II 91 for cutting off the connection between the second balancing channel and the second forming cavity.
[0028] Furthermore, the first molding cavity includes a third annular channel and a first sub-mold cavity uniformly distributed circumferentially on the outer edge of the third annular channel and connected to the third annular channel. The third annular channel is coaxial with the first balancing boss 6 and connected to the first balancing channel.
[0029] Furthermore, the second molding cavity includes a fourth annular channel and a second sub-mold cavity uniformly distributed circumferentially on the outer edge of the fourth annular channel and connected to the fourth annular channel. The fourth annular channel is coaxial with the second balancing boss 7 and connected to the second balancing channel.
[0030] Beneficial effects
[0031] The utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould, set up runner balance subassembly, can make the distance of feeding mouth the distance and cross section area between two forming cavities are same, realize the balance of each runner material flow rate, effectively avoid the material layering or mixing unevenness caused by flow rate difference, ensure the stability of product quality. In addition, this design can also reduce the waste of raw materials, improve production efficiency, reduce energy consumption, be favorable to realize the production concept of green environmental protection, adopt detachable structure, can reduce production difficulty, improve processing accuracy, reduce manufacturing cost, at the same time, it is convenient to assemble and disassemble, and maintenance is convenient, and can change according to demand, satisfy various product injection molding requirements, and the scope of application is wide, the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould, compact structure, low manufacturing cost, good injection molding effect and high efficiency, and the scope of application is wide. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 It is the structure schematic diagram of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0033] Figure 2 It is the sectional view of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0034] Figure 3 It is the structure schematic diagram of the middle mould of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0035] Figure 4 It is another angle structure schematic diagram of the middle mould of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0036] Figure 5 It is the structure schematic diagram of the balance subassembly of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0037] Figure 6 It is the sectional view of the balance subassembly of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0038] Figure 7 It is the explosion structure schematic diagram of the balance subassembly of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0039] Figure 8 It is the structure schematic diagram of the first balance boss of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0040] Figure 9 It is the sectional view of the first balance boss of the utility model discloses a dense multi-cavity runner balance and in-mold hot cutting laminated mould,
[0041] Figure 10This is a cross-sectional view of the center seat of the dense multi-cavity flow channel balance and in-mold hot-cut stacking mold of the utility model;
[0042] Figure 11 This is a schematic structural diagram of the center seat of the dense multi-cavity flow channel balance and in-mold hot-cut lamination mold of the present invention;
[0043] Figure 12 This is a schematic structural diagram of the second balancing boss of the dense multi-cavity flow channel balancing and in-mold hot-cut lamination mold of the present invention;
[0044] Figure 13 A cross-sectional view of the second balancing boss of the dense multi-cavity flow channel balancing and in-mold hot-cut lamination mold of the present invention;
[0045] Figure 14 This is a schematic diagram of the structure of the balancing channel of the dense multi-cavity flow channel balance and the in-mold hot cutting stacking mold of the utility model.
[0046] Figure 15 for Figure 2 Enlarged view of part A in the middle. DETAILED DESCRIPTION
[0047] The following describes the embodiments of the present utility model in detail with reference to the accompanying drawings.
[0048] See Figures 1-15The utility model provides a dense multi-cavity flow channel balance and in-mold hot cutting laminated mold for molding long products such as plastic knives, forks and spoons. The utility model comprises an upper mold 11, a middle mold 12 and a lower mold 13 arranged in sequence from top to bottom. The upper mold 11, the middle mold 12 and the lower mold 13 can realize mold closing and mold separation. A first molding cavity is provided between the upper mold 11 and the middle mold 12, and a second molding cavity is provided between the middle mold 12 and the lower mold 13. Specifically, a first molding surface I is provided on the bottom surface of the upper mold, a first molding surface II 12a corresponding to the first molding surface I is provided on the upper bottom surface of the middle mold, a second molding surface I 12b is provided on the lower bottom surface of the middle mold, and a second molding surface I 12b is provided on the upper bottom surface of the lower mold. The second molding surface II corresponds to the mold; therefore, a first molding cavity can be formed between the lower bottom surface of the upper mold 11 and the upper bottom surface of the middle mold when the mold is closed, and a second molding cavity can be formed between the lower bottom surface of the middle mold 12 and the upper bottom surface of the lower mold 13 when the mold is closed. A feed port 10 is provided at the top center of the upper mold 11, which supplies materials to the first molding cavity and the second molding cavity through a hot nozzle and a flow channel. In order to achieve internal pressure balance and material uniformity, in this application, a flow channel balancing component for achieving internal pressure and material balance is provided between the hot nozzle and the first molding cavity and the second molding cavity. The balancing component includes a first balancing boss 6 and a second balancing boss 7, wherein the first balancing boss 6 is detachably mounted on the upper mold. At the lower end of the mold 11, the second balancing boss 7 is detachably mounted on the upper end of the lower mold 13, and the first balancing boss 6 and the second balancing boss 7 are coaxially arranged. At the same time, a sleeve hole 50 for accommodating the first balancing boss 6 and the second balancing boss 7 to be inserted is opened on the middle mold 12; when the mold is closed, the end face of the first balancing boss 6 and the end face of the second balancing boss 7 can contact and fit with each other, and the outer wall of the first balancing boss 6 and the outer wall of the second balancing boss 7 are in contact and fit with the sleeve hole, forming a transition cavity between the first balancing boss 6 and the second balancing boss 7, and the transition cavity is connected to the injection port (feed port). At the same time, a first balance is formed between the outer wall of the first balancing boss 6 and the inner wall of the sleeve hole. The first molding cavity is connected to the transition cavity through the first balancing channel, and a second balancing channel is formed between the outer wall of the second balancing boss 7 and the inner wall of the sleeve hole. The second molding cavity is connected to the transition cavity through the second balancing channel, and the flow (flow path length) of the above-mentioned first balancing channel and the second balancing channel are the same, and the cross-sectional area of the two is the same, that is, the flow rate is the same. After the above-mentioned structural setting, the molten material output from the hot nozzle can enter the first and second molding cavities with the same stroke and flow rate, thereby ensuring that the pressure, flow rate and flow rate of the molten material entering the first molding cavity and the second molding cavity are the same, thereby achieving simultaneous and uniform filling of the two cavities, and improving the quality and efficiency of product molding. In addition, the design of the runner balancing component is convenient for adjustment and maintenance, effectively reducing the cost of mold manufacturing and extending the service life of the mold. When the mold is parted, the in-mold hot cutting technology is used to achieve rapid separation of the product, reduce the production cycle, and improve production capacity.
[0049] The above-mentioned first balancing channels and second balancing channels are both multiple and evenly distributed circumferentially. In this application, the first balancing channels and the second balancing channels are the same in number and are alternately evenly distributed circumferentially, so that the material filling of the two molding cavities is more uniform, reducing molding defects caused by material imbalance.
[0050] In order to further improve the feeding balance of each sub-cavity of the molding cavity, in this application, a first annular channel is provided between the first balancing boss 6 and the sleeve hole, and the first annular channel is connected to all the first balancing channels to achieve the first pressure balance of the first molding cavity; at the same time, a second annular channel is provided between the second balancing boss 7 and the sleeve hole, and the second annular channel is connected to all the second balancing channels to achieve the first pressure balance of the second molding cavity. On the premise of ensuring the consistency of the flow and cross-sectional area of each channel, this structure is also conducive to the temperature balance of the molten material during the flow process, ensuring the consistency of the material properties in the dual cavities. This not only optimizes the physical properties of the product, but also reduces product defects caused by differences in material properties, further enhancing the market competitiveness and economic benefits of the product.
[0051] In this application, the first molding cavity includes a third annular channel and a first sub-mold cavity uniformly distributed circumferentially on the outer edge of the third annular channel. The first sub-mold cavity is connected to the third annular channel. The third annular channel is coaxial with the first balancing boss 6. At the same time, it is connected to the first balancing channel, which can achieve the balance of each first sub-mold cavity; the second molding cavity includes a fourth annular channel and a second sub-mold cavity uniformly distributed circumferentially on the outer edge of the fourth annular channel. The second sub-mold cavity is connected to the fourth annular channel. The fourth annular channel is coaxial with the second balancing boss 7 and is connected to the second balancing channel, which can achieve the balance of each second sub-mold cavity.
[0052] In the present application, the axial heights of the first balancing boss 6 and the second balancing boss 7 are the same. At the same time, the side walls of the first balancing boss 6 and the second balancing boss 7 are inclined surfaces, which are more conducive to mold closing and mold opening. In this embodiment, the inclination angles of the side walls of the first balancing boss 6 and the second balancing boss 7 are the same, which is convenient for process control, and the angle between the inclined surface and the mold closing direction is greater than or equal to 5 degrees and less than or equal to 15 degrees.
[0053] For details, see Figure 8-Figure 9The first balance boss 6 comprises a first boss 62 with a large upper end and a small lower end, the side wall of the first boss 62 is beveled, the upper end of the first boss 62 extends radially outward to form a first connecting part 61, the first connecting part is circular and used for axial positioning during installation, a hot nozzle installation hole 610 is arranged at the top of the first connecting part 61, the hot nozzle installation hole 610 can accommodate the hot nozzle to be inserted, a circular groove 60a is arranged at the lower end of the first boss 62, the circular groove 60a is internally provided with a feeding hole 600 which is in communication with the hot nozzle installation hole 610 and used for hot nozzle feeding, the bottom surface of the first balance boss is attached to the top surface of the second balance boss during mold clamping, so that the circular groove forms a transition cavity; the circular groove forming the transition cavity not only improves the smoothness of material flow, but also reduces the pressure loss during injection. Through this design, stable filling effect can be maintained even at high speed injection, and the molding quality of complex parts is greatly improved. In addition, after the mold is separated, the structure helps to reduce the residual stress between parts, making the product post-processing more convenient; a first runner groove in communication with the circular groove is arranged at the bottom surface of the first boss 62, one end of the first runner groove is in communication with the upper molding surface of the first molding cavity after passing through the side wall of the first boss 62 and the bottom surface of the first connecting part 61 in sequence, the first runner groove and the middle mold form a first balance channel after mold clamping, the channel is in communication, so that the molten material can be evenly distributed before entering the first molding cavity, effectively avoiding defects such as welding lines and bubbles caused by uneven material distribution; specifically, the first runner groove comprises a first runner groove I 60b, a first runner groove II 60c and a first runner groove III 60e, wherein the first runner groove I 60b is arranged at the bottom surface of the first boss 62 and in communication with the circular groove, the first runner groove II 60c is arranged at the side wall of the first boss 62 and in communication with the first runner groove I 60b, and the first runner groove III 60e is arranged at the bottom surface of the first connecting part 61 and in communication with the first runner groove II 60c; in order to improve the balance between the first runner grooves, a first annular groove 60d is arranged at the side wall of the first boss 62 or at the bottom surface of the first connecting part 61, the first annular groove 60d is coaxial with the first balance boss 6 and in communication with the first runner grooves, and the first annular groove 60d and the sleeve hole form a first annular channel; at the same time, the first runner groove II 60c and the first runner groove III 60e are staggered, and balance can be achieved through the first annular channel.
[0054] Referring to Figure 12-13The second balancing boss 7 includes a second boss 72 with a small upper end and a large lower end. The side wall of the second boss 72 is an inclined surface. The lower end of the second boss 72 extends radially outward to form a second connecting portion 71, which is used to connect with the lower mold. The upper bottom surface of the second boss 72 is provided with a second runner groove, which can be connected to the circular groove on the first balancing boss when the mold is closed. As the feeding end, one end of the second runner groove passes through the side wall of the second boss 72 and the upper bottom surface of the second connecting portion 71 and is connected to the lower molding surface of the molding cavity. When the mold is closed, a second balancing channel is formed between the second runner groove and the middle mold; specifically, the second runner groove includes a second runner groove I 70a, a second runner groove II 70b and a second runner groove III 70d, wherein the second runner groove I 70a is arranged on the top surface of the second boss 72, and when the mold is closed, the second runner groove is connected to the lower molding surface of the molding cavity. When the mold is closed, it can be connected with the circular groove. The second runner groove II 70b is arranged on the side wall of the second boss 72, which is connected with the second runner groove I 70a. The second runner groove III 70d is arranged on the upper bottom surface of the second connecting part 71, which is connected with the second runner groove II 70b; in order to improve the balance between each other, a second annular groove 70c is provided on the side wall of the second boss 72 or on the upper bottom surface of the second connecting part 71. The second annular groove 70c is coaxial with the second balancing boss 7 and is connected with each second runner groove. When the mold is closed, a second annular channel is formed between the second annular groove 70c and the sleeve hole; in order to further improve the balance between the runners, the second runner groove II 70b and the second runner groove III 70d are alternately arranged, that is, staggered, and can achieve balance through the second annular channel.
[0055] In order to reduce the difficulty of processing and manufacturing costs, and at the same time facilitate replacement, improve the applicable scenarios and facilitate later maintenance, a center seat 5 is provided on the middle mold 12 in this application, and a sleeve hole 50 is opened on the center seat 5. Specifically, the center seat 5 is cylindrical as a whole, and its upper end extends radially outward to form a third connecting portion 51, which serves as the connection end with the middle mold; the sleeve hole runs through the upper and lower ends of the center seat, and includes an upper hole body 50a and a lower hole body 50b. The upper hole body can accommodate the first balancing boss to be inserted and fit its outer wall, and the lower hole body 50b can accommodate the second balancing boss to be inserted and fit its outer wall. Outer wall, in this application, the upper hole body 50a is a conical structure with a larger upper part and a smaller lower part, and the lower hole body 50b is a conical structure with a larger lower part and a smaller upper part; a third flow channel groove 501 corresponding to the first flow channel groove one by one is provided on the upper end surface of the center seat, specifically, corresponding to the first flow channel groove I, which can increase the feed area; a fourth flow channel groove 502 corresponding to the second flow channel groove one by one is provided on the lower end surface of the center seat, specifically, corresponding to the second flow channel groove I, which increases the feed area; an annular groove 52 is opened on the side wall of the center seat 5, and a circular cooling channel is formed between the annular groove 52 and the middle mold.
[0056] In order to ensure the hygiene of product packaging, in this application, a first cutter group for cutting off the two ends of the first balancing channel is provided in the upper mold 11, and a second cutter group for cutting off the two ends of the second balancing channel is provided in the lower mold 13; the first cutter group includes a first cutter I and a first cutter II, the first cutter I is used to cut off the connection between the first balancing channel and the transition cavity, and the first cutter II is used to cut off the connection between the first balancing channel and the first molding cavity; the second cutter group includes a second cutter I 92 and a second cutter II 91, the second cutter I 92 is used to cut off the connection between the second balancing channel and the transition cavity, and the second cutter II 91 is used to cut off the connection between the second balancing channel and the second molding cavity.
[0057] The utility model is a dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold, which is provided with a flow channel balancing component, which can make the distance between the feed port and the distance between the two molding cavities and the cross-sectional area the same, realize the balance of the material flow rate in each flow channel, effectively avoid the stratification or uneven mixing of materials caused by the flow rate difference, and ensure the stability of product quality. In addition, the design can also reduce the waste of raw materials, improve production efficiency, reduce energy consumption, and is conducive to the realization of green and environmentally friendly production concepts; the use of a detachable structure can reduce the difficulty of production, improve processing accuracy, and reduce manufacturing costs. At the same time, it is easy to load and unload, easy to maintain, and can be replaced according to demand, meeting the injection molding requirements of various products, and has a wide range of applications; the utility model is a dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold, which has a compact structure, low manufacturing cost, good injection molding effect and high efficiency, and has a wide range of applications.
[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A dense multi-cavity flow channel balance and in-mold hot cutting laminated mold, characterized by: The mold comprises an upper mold, a middle mold and a lower mold arranged in sequence from top to bottom, a first molding cavity is provided between the upper mold and the middle mold, a second molding cavity is provided between the middle mold and the lower mold, a first balancing boss is provided at the lower end of the upper mold, a second balancing boss coaxial with the first balancing boss is provided at the upper end of the lower mold, and a sleeve hole for accommodating the first balancing boss and the second balancing boss to be inserted is provided on the middle mold; when the mold is closed, a transition cavity connected to the injection port is formed between the first balancing boss and the second balancing boss, a first balancing channel is formed between the first balancing boss and the sleeve hole, the first molding cavity is connected to the transition cavity through the first balancing channel, a second balancing channel is formed between the second balancing boss and the sleeve hole, the second molding cavity is connected to the transition cavity through the second balancing channel, and the first balancing channel and the second balancing channel have the same flow path and cross-sectional area.
2. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: There are multiple first balancing channels and multiple second balancing channels, and the channels are evenly distributed along the circumference.
3. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: A first annular channel communicating with each of the first balancing channels is provided between the first balancing boss and the sleeve hole; a second annular channel communicating with each of the second balancing channels is provided between the second balancing boss and the sleeve hole.
4. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: The first balancing boss and the second balancing boss have the same axial height.
5. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: The middle mold is provided with a center seat, and the sleeve hole is opened on the center seat.
6. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: The first balancing boss includes a first boss that is larger at the upper end and smaller at the lower end, the upper end of the first boss extends radially outward and forms a first connecting portion, the top of the first connecting portion is provided with a hot nozzle mounting hole for inserting a hot nozzle, the lower end of the first boss is provided with a circular groove, the circular groove is provided with a feed hole that is connected to the hot nozzle mounting hole and is used for feeding; the bottom surface of the first boss is provided with a first flow channel groove that is connected to the circular groove, one end of the first flow channel groove is connected to the upper molding surface of the first molding cavity after passing through the side wall of the first boss and the bottom surface of the first connecting portion, and the first balancing channel is formed between the first flow channel groove and the middle mold.
7. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 6, characterized in that: The first flow channel includes a first flow channel I arranged on the bottom surface of the first boss and connected to the circular groove, a first flow channel II arranged on the side wall of the first boss and connected to the first flow channel I, and a first flow channel III arranged on the bottom surface of the first connecting portion and connected to the first flow channel II.
8. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: The second balancing boss includes a second boss with a small upper end and a large lower end. The lower end of the second boss extends radially outward and forms a second connecting portion. The upper bottom surface of the second boss is provided with a second runner groove that can be connected to the circular groove on the first balancing boss when the mold is closed. One end of the second runner groove passes through the side wall of the second boss and the upper bottom surface of the second connecting portion and is connected to the lower molding surface of the second molding cavity. The second balancing channel is formed between the second runner groove and the middle mold.
9. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 8, characterized in that: The second flow channel includes a second flow channel I arranged on the top surface of the second boss and capable of communicating with the circular groove when the mold is closed, a second flow channel II arranged on the side wall of the second boss and communicating with the second flow channel I, and a second flow channel III arranged on the upper bottom surface of the second connecting portion and communicating with the second flow channel II.
10. The dense multi-cavity flow channel balancing and in-mold hot cutting lamination mold according to claim 1, characterized in that: A first cutting knife group for cutting off the two ends of the first balancing channel is provided in the upper die, and a second cutting knife group for cutting off the two ends of the second balancing channel is provided in the lower die.