Mould structure fuel gas exhaust structure of U-shaped groove part
By designing a moving mold insert and fixing components in the U-shaped groove, the problem that traditional exhaust channels cannot reach the bottom of the U-shaped groove is solved, enabling timely gas discharge and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202422990923.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Traditional venting channels cannot effectively reach the bottom of the U-shaped groove, causing gas accumulation, which affects the flow of plastic melt and product quality, resulting in problems such as burns, material shortages, and dimensional deviations.
The moving mold insert is designed to include two separate inserts, and an upper exhaust channel is opened at the bottom of the U-shaped groove. Combined with the insert protrusion, insert groove and positioning pin fixing components, an upper and lower exhaust channel and transition area are formed to ensure smooth gas discharge.
It significantly improves the venting effect of the U-shaped groove, enhances product quality and production efficiency, reduces scrap rate, and improves mechanical performance and dimensional accuracy.
Smart Images
Figure CN223520109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection mold technical field especially, relates to a mold structure gas exhaust structure of U -shaped groove part. BACKGROUND
[0002] In modern manufacturing industry, plastic products have been widely used in all walks of life with the advantages of light weight, durability, low cost, injection molding as one of the main production methods of plastic products, occupies a pivotal position in mass production, in the injection molding process, mold gas exhaust structure is a structure specially designed to solve the gas exhaust problem in the cavity in the injection molding process, its principle is to build a specific channel or space in the mold, so that the gas in the cavity can be smoothly discharged outside the mold during injection molding, to ensure that the plastic melt can be uniformly and stably filled in the cavity, so as to obtain high-quality injection molding products
[0003] At present, the traditional exhaust solution mainly relies on the exhaust groove, but this way is not up to the task when facing complex mold structure, especially the deep and narrow U-shaped groove structure, in the deep and narrow U-shaped groove structure, gas is easy to accumulate at the bottom of the groove, because the traditional exhaust groove is difficult to effectively reach these parts, the gas cannot be discharged in time, which leads to abnormal pressure rise in the cavity. Not only will the plastic melt be subjected to uneven resistance during filling, affecting the normal flow of the melt, and thus causing defects such as material shortage and short shot, but also high temperature will be generated due to gas compression, which will cause serious quality problems such as burning and carbonization on the surface of the product. These problems not only reduce the appearance quality of the product, causing defects such as surface flaws and mottling that affect the appearance, but also have a negative impact on the mechanical properties and dimensional accuracy of the product, resulting in reduced strength and excessive dimensional deviation, which seriously affects the assembly and use performance of the product, greatly increases the scrap rate, increases the production cost and reduces the production efficiency, therefore, a mold structure gas exhaust structure for U-shaped groove part is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0004] In order to make up for the above shortcomings, the utility model provides a mold structure gas exhaust structure for U-shaped groove part, which aims to improve the problems in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A mold structure gas exhaust structure for U-shaped groove part, comprising a mold body, a cavity is formed in the middle of the mold body, an exhaust assembly is arranged inside the cavity, a fixing assembly is arranged between the mold body and the exhaust assembly;
[0007] The exhaust assembly comprises a movable die insert, the movable die insert is assembled in the middle of the cavity, the U-shaped groove is arranged in the middle of the movable die insert, the movable die insert is assembled with a split insert one and a split insert two, the bottom of the U-shaped groove is provided with an upper exhaust channel, and one end of the upper exhaust channel away from the U-shaped groove is fixedly connected with a lower exhaust channel.
[0008] As a further description of the above technical solution:
[0009] The fixed assembly comprises an insert protrusion, the insert protrusion is assembled at one end of the split insert two away from the mold body.
[0010] As a further description of the above technical solution:
[0011] The fixed assembly further comprises an insert groove, the insert groove is assembled at one end of the split insert one away from the split insert two.
[0012] As a further description of the above technical solution:
[0013] The fixed assembly further comprises a positioning pin, the positioning pin is assembled between the mold body and the movable die insert.
[0014] As a further description of the above technical solution:
[0015] The insert protrusion is slidingly connected in the middle of the split insert one, and the insert groove is assembled at one end of the split insert two away from the mold body.
[0016] As a further description of the above technical solution:
[0017] The upper exhaust channel and the lower exhaust channel are connected, and the upper exhaust channel and the lower exhaust channel are both through-connected to the bottom surface of the movable die insert.
[0018] As a further description of the above technical solution:
[0019] An exhaust channel connecting transition area is assembled between the upper exhaust channel and the lower exhaust channel.
[0020] As a further description of the above technical solution:
[0021] The diameter of the lower exhaust channel is larger than that of the upper exhaust channel, and the diameter ratio of the two ranges from 5:1 to 10:1.
[0022] The utility model has the advantages of the following beneficial effects:
[0023] The utility model discloses, through the dynamic mould insert is designed to contain split insert one and split insert two, and the upper exhaust passage is set up in the U-shaped recess bottom, can accurate positioning and collect the gas of recess bottom accumulation, avoided the traditional exhaust groove difficultly to reach recess bottom gas accumulation area's problem, the exhaust effect of U-shaped recess part has been improved significantly, the gas in cavity is discharged in time greatly, maintains pressure stability, guarantees the stability of injection molding operation and the quality of product.
[0024] 2、The utility model discloses, through the cooperation and positioning of insert boss and insert recess and the positioning of positioning pin, the stable assembly of dynamic mould insert in mould is ensured, the mould can better adapt to the exhaust demand of such complex structure, expands the application scope of mould, can be used for the production of more products with similar structural features, simple structure, convenient to use. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a three-dimensional schematic view of the mould structure gas exhaust structure of U-shaped recess part that the utility model proposes;
[0026] Figure 2 It is a structure schematic view of split insert one of the mould structure gas exhaust structure of U-shaped recess part that the utility model proposes;
[0027] Figure 3 It is a structure schematic view of insert recess of the mould structure gas exhaust structure of U-shaped recess part that the utility model proposes.
[0028] LEGEND:
[0029] 1, mould body, 2, cavity, 3, dynamic mould insert, 4, U-shaped recess, 5, split insert one, 6, split insert two, 7, insert boss, 8, insert recess, 9, positioning pin, 10, upper exhaust passage, 11, lower exhaust passage, 12, exhaust passage connection transition area. DETAILED DESCRIPTION
[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0031] REFERENCE Figure 1 and Figure 3The utility model provides a kind of mould structure gas exhaust structure of U-shaped groove 4 part: a kind of mould body 1, the middle part of mould body 1 is equipped with cavity 2, the inside of cavity 2 is provided with exhaust component, fixed component is provided between mould body 1 and exhaust component;
[0032] Exhaust component includes movable mould insert 3, movable mould insert 3 is assembled in the middle part of cavity 2, U-shaped groove 4 is equipped in the middle part of movable mould insert 3, split insert one 5 and split insert two 6 are assembled in movable mould insert 3, upper exhaust passage 10 is equipped in the bottom of U-shaped groove 4, the end of upper exhaust passage 10 away from U-shaped groove 4 is fixedly connected with lower exhaust passage 11, upper exhaust passage 10 is connected with lower exhaust passage 11, and upper exhaust passage 10 and lower exhaust passage 11 are all through connection in the bottom surface of movable mould insert 3, the diameter of lower exhaust passage 11 is greater than the diameter of upper exhaust passage 10, and the diameter ratio range of two is 5:1 to 10:1, and gas is gathered to the bottom of U-shaped groove 4 in the middle part of movable mould insert 3 by gas.At this time, lower exhaust passage 11 and upper exhaust passage 10 in the bottom of U-shaped groove 4 start to collect gas, and gas is connected transition zone 12 into larger diameter lower exhaust passage 11 through exhaust passage, and gas is quickly discharged because lower exhaust passage 11 is through movable mould insert 3 bottom surface;
[0033] Through this design, effectively solve the gas exhaust problem of U-shaped groove part, avoid the product surface burn, material shortage, size deviation and other problems caused by gas accumulation, significantly improve the appearance quality of product, make its surface smooth, no flaw;Guarantee the size precision of product, so that it can better meet the assembly requirement;Improve the mechanical properties of product, enhance its use reliability and durability.Simultaneously, reduce the scrap rate, improve production efficiency, save production cost for enterprise, improve market competitiveness.
[0034] Refer to Figure 3The fixing assembly comprises a split insert two 6, a split insert one 5, a split insert protrusion 7, a split insert recess 8 and a positioning pin 9. The split insert two 6 is arranged at one end of the mold body 1 away from the split insert one 5. The split insert protrusion 7 is arranged at the middle of the split insert one 5. The split insert recess 8 is arranged at one end of the split insert two 6 away from the mold body 1. The positioning pin 9 is arranged between the mold body 1 and the movable mold insert 3. The split insert protrusion 7 is slidably connected to the middle of the split insert one 5. The split insert recess 8 is arranged at one end of the split insert two 6 away from the mold body 1. The split insert one 5 and the split insert two 6 are fixed in the movable mold insert 3 through the high-precision cooperation of the split insert protrusion 7 and the split insert recess 8. The shapes and sizes of the split insert protrusion 7 and the split insert recess 8 are carefully designed, and the cooperation tolerance is controlled within a very small range, usually between ±0.01mm and ±0.03mm, to ensure that the split insert one 5 and the split insert two 6 do not move relative to each other after assembly. At the same time, the positioning pin 9 further accurately positions the split insert one 5 and the split insert two 6. The positioning pin 9 is in interference fit with the positioning holes on the movable mold insert 3 and the split insert. The interference amount is generally 0.005mm-0.015mm, which ensures the position accuracy and stability of the split insert in the movable mold insert 3.
[0035] The multiple positioning and connecting mode effectively prevents the split insert from loosening or moving due to high-pressure impact of plastic melt and thermal expansion and contraction during injection molding, thereby ensuring the stability of the exhaust structure.
[0036] Referring to Figure 3 The exhaust passage connecting transition area 12 is arranged between the upper exhaust passage 10 and the lower exhaust passage 11. Since the diameters of the upper exhaust passage 10 and the lower exhaust passage 11 are different, if they are directly connected, the gas flow will easily produce turbulence due to sudden changes in the passage, leading to poor exhaust or even blockage. The exhaust passage connecting transition area 12 is designed in a gradual changing manner, and its shape and size can make the gas gradually adapt to the changes in the passage, with smooth pressure transition, ensuring that the gas flows smoothly from the narrower upper exhaust passage 10 into the wider lower exhaust passage 11, thereby improving the exhaust efficiency of the entire exhaust system.
[0037] Working principle: During injection molding, plastic melt is injected into the cavity 2 of the mold body 1, and gas is gathered at the bottom of the U-shaped groove 4 in the middle of the movable mold insert 3. At this time, the upper exhaust passage 10 at the bottom of the U-shaped groove 4 starts to collect gas, and the gas enters the larger-diameter lower exhaust passage 11 through the exhaust passage connecting transition area 12. Since the lower exhaust passage 11 penetrates through the bottom surface of the movable mold insert 3, the gas can be discharged. The split insert one 5 and the split insert two 6 are fixed in the movable mold insert 3 through the cooperation of the split insert protrusion 7 and the split insert recess 8 and the positioning pin 9, ensuring the stability of the exhaust structure. During the entire process, the components work cooperatively, and this mode effectively solves the problem of difficult gas discharge at the U-shaped groove position.
[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. A mould structure gas exhaust structure for a U- groove site, comprising a mould body (1), characterised in that: The middle part of the mold body (1) is provided with a cavity (2), the inside of the cavity (2) is provided with an exhaust assembly, and the mold body (1) and the exhaust assembly are provided with a fixing assembly; The exhaust assembly comprises a movable mold insert (3), the movable mold insert (3) is assembled in the middle part of the cavity (2), the U-shaped groove (4) is arranged in the middle part of the movable mold insert (3), the movable mold insert (3) is assembled with a split insert one (5) and a split insert two (6), the bottom of the U-shaped groove (4) is provided with an upper exhaust channel (10), and one end of the upper exhaust channel (10) away from the U-shaped groove (4) is fixedly connected with a lower exhaust channel (11).
2. A gas discharge structure of a mold structure of a U-shaped groove portion according to claim 1, characterized by: The fixing assembly comprises an insert protrusion (7), and the insert protrusion (7) is assembled at one end of the split insert two (6) away from the mold body (1).
3. A U-groove site mold structure gas discharge structure according to claim 2, characterized by: The fixing assembly further comprises an insert groove (8), and the insert groove (8) is assembled at one end of the split insert one (5) away from the split insert two (6).
4. The U-groove site mold structure gas discharge structure according to claim 1, characterized by: The fixing assembly further comprises a positioning pin (9), and the positioning pin (9) is assembled between the mold body (1) and the movable mold insert (3).
5. A U-groove site mold structure gas discharge structure according to claim 3, characterized by: The insert protrusion (7) is slidingly connected in the middle part of the split insert one (5), and the insert groove (8) is assembled at one end of the split insert two (6) away from the mold body (1).
6. A U-groove site mold structure gas discharge structure according to claim 1, characterized by: The upper exhaust channel (10) is connected with the lower exhaust channel (11), and the upper exhaust channel (10) and the lower exhaust channel (11) are both connected through the bottom surface of the movable mold insert (3).
7. The U-groove site mold structure gas discharge structure according to claim 1, characterized by: The upper exhaust channel (10) and the lower exhaust channel (11) are assembled with an exhaust channel connecting transition zone (12).
8. The U-groove site mold structure gas discharge structure according to claim 1, characterized by: The diameter of the lower exhaust channel (11) is larger than that of the upper exhaust channel (10), and the diameter ratio of the two ranges from 5:1 to 10:1.