Injection mold beneficial to product forming
By using the sliding fit between the inclined guide post and the slide seat, along with the design of elastic elements, the problems of insert deformation and collision in traditional injection molds are solved, thereby improving mold stability and product quality.
Patent Information
- Application Number
- CN202422892001.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In traditional injection molds, the rigid connection method of inserts is prone to deformation and wear under high temperature and high pressure environment, and collisions or poor fit are likely to occur during the mold movement, affecting product quality and precision.
The insert is driven by the sliding engagement of the inclined guide post and the sliding seat, and the insert is elastically connected by the elastic element to buffer thermal expansion and mechanical impact, ensuring the stability and accuracy of the insert under complex working conditions.
It improves the stability and service life of molds, enhances product appearance quality and dimensional accuracy, reduces flash and dimensional deviations, and increases product qualification rate.
Smart Images
Figure CN223520106U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a mould technical field, concretely is a injection mould that is beneficial to product forming. BACKGROUND
[0002] In the field of injection mould, with the increasingly wide application of plastic products and the continuous improvement of its quality and precision, the design and manufacture of mould are facing many challenges.
[0003] In the traditional injection mould, for the product forming with complex shape or special structure, often need to adopt the line position structure to realize the side core pulling action, to ensure that the product can be smoothly demoulded. For example, in the production process of some plastic products with undercut, side hole or side concave features, the normal operation of the line position structure plays a key role in product forming. However, the traditional line position structure design has some limitations in practical application.
[0004] When the line position structure of the mould is involved, the rigid butt joint mode is usually adopted between the inserts. This rigid butt joint mode is prone to problems when facing various complex situations in the injection molding process. On the one hand, during the injection molding process, the plastic melt will produce a high temperature and high pressure environment when it is injected into the mold cavity, which will cause the inserts to expand due to heat and bear a large pressure. Since the inserts adopt rigid butt joint, they cannot effectively adapt to the size change caused by thermal expansion, which may cause excessive stress between the inserts, and further cause insert deformation, wear and even damage, seriously affecting the service life of the mould and the forming precision of the product. On the other hand, during the opening and closing of the mould and the core pulling and resetting of the line position, due to factors such as inertia of mechanical movement and assembly precision, the inserts are prone to collision or poor cooperation. The rigidly butt-jointed inserts are difficult to buffer and adaptively adjust in these situations, which may cause gaps or misalignment at the butt joint of the inserts, causing the plastic melt to enter the gap and form burrs, affecting the appearance quality and dimensional accuracy of the product.
[0005] Therefore, it is necessary to propose an improved technical scheme to solve the above problems. UTILITY MODEL CONTENTS
[0006] The utility model aims at providing a technical scheme that can solve the above problems.
[0007] A kind of injection mould that is beneficial to product forming, including upper die and lower die, the upper die has upper die kernel, the lower die has lower die kernel, the upper die and lower die are butted and are cooperated, to make upper die kernel and lower die kernel mutually butt joint and form the mold cavity for forming product, first line position structure and second line position structure are provided between the upper die and lower die and are oppositely arranged;
[0008] The first row structure and the second row structure are respectively provided with an inclined guide pillar fixed to the upper die, a first guide rail and a second guide rail fixed to the lower die, and a row seat slidably fitted between the first guide rail and the second guide rail, the inclined guide pillar is in sliding fit with the row seat, so that the row seat is driven by the inclined guide pillar to slide towards the direction of abutting or separating from the mold cavity.
[0009] One end of the row seat of the first row structure towards the mold cavity is connected with a first insert, one end of the row seat of the second row structure towards the mold cavity is connected with a second insert, and one side of the first insert and the second insert towards the mold cavity is respectively provided with a product profiling structure.
[0010] As a further scheme of the utility model, the matching end of the first insert corresponding to the second insert extends to form a protruding part, the matching end of the second insert corresponding to the first insert is provided with a groove, and the protruding part is in abutting fit with the groove.
[0011] An elastic element is arranged in the groove, one end of the elastic element is connected with the groove, and the other end of the elastic element extends out of the groove, wherein the protruding part is provided with an abutting groove matched with the elastic element.
[0012] As a further scheme of the utility model, the inner wall of the groove is provided with a connecting block, and one end of the elastic element is in clamping fit with the connecting block.
[0013] As a further scheme of the utility model, a sealing ring matched with the protruding part is arranged at the opening of the groove.
[0014] As a further scheme of the utility model, an elastic abutting block is arranged on the parting surface of the lower die and in the sliding stroke range of the row seat, the movable end of the elastic abutting block extends to the surface of the lower die, wherein the bottom end of the row seat is provided with a first positioning groove and a second positioning groove matched with the movable end.
[0015] As a further scheme of the utility model, the movable end of the elastic abutting block is convex along the middle position, guide inclined surfaces are formed on both sides of the middle convex position, and the first positioning groove and the second positioning groove are matched with the shape of the movable end.
[0016] As a further scheme of the utility model, the elastic element is a cylindrical helical spring.
[0017] Compared with the prior art, the utility model has the beneficial effects as follows:
[0018] 1) due to the elastic butt joint of the first insert and the second insert, the mold can better adapt to various complex working conditions in the injection molding process, when facing the high temperature and high pressure environment of the plastic melt, the first insert and the second insert can compensate the thermal expansion through elastic deformation, reduce the stress concentration caused by thermal expansion and cold shrinkage, effectively prevent the deformation and damage of the insert, improve the stability and reliability of the mold under different temperature conditions, and prolong the service life of the mold;
[0019] 2) in the mold opening and closing and the core pulling and resetting process, the elastic butt joint of the first insert and the second insert can buffer the collision and poor matching caused by mechanical motion inertia and assembly precision, and the first insert and the second insert will not have gap or misplacement due to rigid collision, so as to avoid the plastic melt entering the gap to form flash and other defects, significantly improve the appearance quality of the product, at the same time, the elastic butt joint is also helpful to maintain the position accuracy of the first insert and the second insert in the whole injection molding cycle, so that the size accuracy of the product is easier to control, the size deviation of the product caused by the mold is reduced, and the qualified rate of the product is improved.
[0020] The additional aspects and advantages of the present application will be partially given in the following description, and some will become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0022] Figure 1 is a cross-sectional structure schematic view of a view angle of the present application;
[0023] Figure 2 is Figure 1 the enlarged structure schematic view of A in the figure;
[0024] Figure 3 is a cross-sectional structure schematic view of another view angle of the present application;
[0025] Figure 4 is Figure 3 the enlarged structure schematic view of B in the figure;
[0026] Figure 5 is a structure schematic view of the lower mold of the present application;
[0027] Figure 6 is a structure schematic view of the cooperation of the first row and the second row of the present application.
[0028] The reference signs and names in the drawings are as follows:
[0029] 1, upper die; 2, lower die; 3, upper die core; 4, lower die core; 5, mold cavity; 6, first row structure; 7, second row structure; 8, inclined guide pillar; 9, first guide rail; 10, second guide rail; 11, row seat; 12, first insert; 13, second insert; 14, product profiling structure; 15, protruding part; 16, groove; 17, elastic element; 18, abutting groove; 19, connecting block; 20, sealing ring; 21, elastic abutting block; 22, first positioning groove; 23, second positioning groove; 24, guide inclined surface. DETAILED DESCRIPTION
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0031] Please refer to Figures 1-6 In the embodiments of the present application, an injection mold beneficial to product forming includes an upper die 1 and a lower die 2. The upper die 1 has an upper die core 3, and the lower die 2 has a lower die core 4. The upper die 1 and the lower die 2 are butted and matched to make the upper die core 3 and the lower die core 4 butt against each other to form a mold cavity 5 for forming a product. First row structures 6 and second row structures 7 are arranged opposite to each other between the upper die 1 and the lower die 2.
[0032] The first row structures 6 and the second row structures 7 are respectively provided with inclined guide pillars 8 fixed to the upper die 1, first guide rails 9 and second guide rails 10 fixed to the lower die 2, and row seats 11 slidably embedded between the first guide rails 9 and the second guide rails 10. The inclined guide pillars 8 are in sliding cooperation with the row seats 11 to drive the row seats 11 to slide toward the direction of butting against or separating from the mold cavity 5 through the inclined guide pillars 8.
[0033] One end of the row seat 11 of the first row structure 6 toward the mold cavity 5 is connected with a first insert 12, and one end of the row seat 11 of the second row structure 7 toward the mold cavity 5 is connected with a second insert 13. The first insert 12 and the second insert 13 are respectively provided with product profiling structures 14 on one side thereof toward the mold cavity 5. The first insert 12 and the second insert 13 are in elastic butt cooperation.
[0034] The utility model discloses technical scheme, this injection mold utilizes the sliding fit principle of inclined guide pillar 8 and line position seat 11 to drive first line position structure 6 / second line position structure 7 movement, inclined guide pillar 8 is fixed in upper die 1, when the mold carries out the opening and closing mold action, the movement of upper die 1 drives inclined guide pillar 8 movement, because inclined guide pillar 8 and line position seat 11 are sliding fit relations, the inclination angle of inclined guide pillar 8 makes it in the process of up and down movement can convert the movement of vertical direction into horizontal direction force, to push line position seat 11 and slide between the first guide rail 9 and second guide rail 10 fixed in lower die 2, this design guarantees that line position seat 11 can stably move towards the cavity 5 or separate from the cavity 5 along the predetermined direction, realizes lateral core-pulling action, to meet the basic demand of having complex shape product demoulding,
[0035] First insert piece 12 and second insert piece 13 are connected at the end of line position seat 11 of first line position structure 6 and second line position structure 7 towards cavity 5 respectively, and the elastic butt joint cooperation mode is used between the two, and elastic element 17, for example spring, is arranged in the internal structure of first insert piece 12 / second insert piece 13 or the connecting part thereof with line position seat 11, when first insert piece 12, second insert piece 13 are subjected to various external forces in the complex process of injection molding, elastic element 17 will play its unique elastic deformation characteristics, for example, when plastic melt is injected into cavity 5 at high pressure and high speed, strong pressure impact will be generated to first insert piece 12, second insert piece 13, and impact force will also be generated due to the movement inertia of mechanical parts in the opening and closing mold and line position movement process of mold, at this time, elastic element 17 can quickly absorb and buffer these external forces like a shock absorber, so that the butt joint relation between first insert piece 12 and second insert piece 13 has the ability of self-adapting adjustment within a certain range, and in the injection molding process, first insert piece 12 and second insert piece 13 will inevitably be affected by the high temperature of plastic melt and expand, elastic element 17 can be compressed when first insert piece 12 and second insert piece 13 expand, thereby flexibly providing necessary space for the expansion of first insert piece 12 and second insert piece 13, and skillfully avoiding the troublesome problem of stress sharply increasing between first insert piece 12 and second insert piece 13 due to thermal expansion, ensuring that first insert piece 12 and second insert piece 13 always maintain good cooperation state in the complex injection environment;
[0036] In summary, due to the elastic butt joint of the first insert 12 and the second insert 13, the mold can better adapt to various complex working conditions in the injection molding process. When facing the high-temperature and high-pressure environment of the plastic melt, the first insert 12 and the second insert 13 can compensate for thermal expansion through elastic deformation, reduce stress concentration caused by thermal expansion and cold contraction, effectively prevent insert deformation and damage, improve the stability and reliability of the mold under different temperature conditions, and prolong the service life of the mold. During mold opening and closing, as well as core pulling and resetting, the elastic butt joint of the first insert 12 and the second insert 13 can buffer the impact and poor fit caused by mechanical motion inertia and assembly precision, and the first insert 12 and the second insert 13 will not have gaps or misalignment due to rigid impact, thereby avoiding the plastic melt entering the gap to form flash and other defects, significantly improving the appearance quality of the product. At the same time, the elastic butt joint also helps to maintain the position accuracy of the first insert 12 and the second insert 13 during the entire injection molding cycle, making it easier to control the dimensional accuracy of the product and reducing the dimensional deviation caused by the mold, thereby improving the product yield.
[0037] In the embodiment of the utility model, the first insert 12 extends to form a protruding part 15 corresponding to the fitting end of the second insert 13, the second insert 13 is provided with a groove 16 corresponding to the fitting end of the first insert 12, and the protruding part 15 is butt jointed with the groove 16.
[0038] An elastic element 17 is arranged in the groove 16, one end of the elastic element 17 is connected with the groove 16, the other end of the elastic element 17 extends out of the groove 16, and the protruding part 15 is provided with an abutting groove 18 matched with the elastic element 17.
[0039] The protruding part 15 of the first insert 12 is butt jointed with the groove 16 of the second insert 13 to form a precise positioning structure, the shape and size of the protruding part 15 are matched with the groove 16, and during mold closing, the first insert 12 and the second insert 13 can be accurately butt jointed together to ensure the relative position accuracy of the two in the horizontal and vertical directions. This mechanical limiting structure provides a stable basis for the subsequent elastic element 17 to play a role, so that the relative displacement of the first insert 12 and the second insert 13 can be effectively controlled within a certain range when subjected to various forces, ensuring the integrity and stability of the mold forming chamber, which is beneficial to the accurate forming of the product.
[0040] The elastic element 17 is arranged in the groove 16, one end of which is connected with the groove 16 and the other end of which extends out of the groove 16 and is matched with the abutting groove 18 of the protruding part 15. During the working process of the mold, when an external force is applied, for example, the pressure generated by the injection of plastic melt makes the first insert 12 and the second insert 13 have a tendency of mutual extrusion or separation, or the impact force generated during mold opening and closing and line movement, etc., the elastic element 17 will be elastically deformed according to the size and direction of the external force. When the first insert 12 and the second insert 13 are extruded, the elastic element 17 is compressed to store elastic potential energy; when the external force disappears or decreases, the elastic element 17 releases the elastic potential energy by relying on its own restoring force, so that the first insert 12 and the second insert 13 return to the initial relative position or are properly adjusted. At the same time, when the first insert 12 and the second insert 13 are heated and expanded, the elastic element 17 can also be compressed to provide space for the thermal expansion of the first insert 12 and the second insert 13, so as to avoid deformation or damage of the first insert 12 and the second insert 13 due to excessive stress caused by thermal expansion.
[0041] In the embodiment of the utility model, the inner wall of the groove 16 is provided with a connecting block 19, and one end of the elastic element 17 is matched with the connecting block 19.
[0042] One end of the elastic element 17 is matched with the connecting block 19, and the connecting block 19 can be fixed in the groove 16. This matching mode can ensure that the elastic element 17 is stably positioned in the groove 16 and prevent it from being displaced or falling off due to various forces during the working process of the mold. When the first insert 12 and the second insert 13 are extruded or stretched by an external force, the elastic element 17 is stretched and deformed with the connecting block 19 as a fixed base point, the connecting block 19 bears and transmits the reaction force of the elastic element 17, so that the force transmission between the elastic element 17 and the first insert 12 and the second insert 13 is more stable and reliable, thereby ensuring the effectiveness of the elastic element 17 in the buffering and self-adaptive adjustment process.
[0043] A sealing ring 20 is arranged at the opening of the groove 16 and fits the protrusion 15, mainly by using the elastic sealing performance of the sealing ring 20, when the first insert 12 and the second insert 13 are butted, the protrusion 15 is inserted into the groove 16, the sealing ring 20 is pressed between the protrusion 15 and the opening edge of the groove 16, the material of the sealing ring 20 generally has good elasticity and resilience, and can tightly fit the surface of the protrusion 15 after being pressed, so as to form a reliable sealing interface, thus plastic melt can be effectively prevented from entering the inside of the groove 16 in the injection molding process, and the elastic element 17 can be prevented from being eroded, polluted or affected by the melt, and the sticking or jamming phenomenon between the first insert 12 and the second insert 13 caused by the melt entering can also be prevented, so as to ensure the smooth movement of the first insert 12 and the second insert 13 and the normal operation of the mold.
[0044] In the embodiment of the utility model, the elastic abutting block 21 is installed on the parting surface of the lower mold 2 and in the sliding stroke range of the row position seat 11, the movable end of the elastic abutting block 21 extends to the surface of the lower mold 2, wherein the bottom end of the row position seat 11 is provided with the first positioning groove 22 and the second positioning groove 23 matched with the movable end.
[0045] The movable end of the elastic abutting block 21 is convex at the middle position, the guide inclined surface 24 is formed on both sides of the middle convex position, and the first positioning groove 22 and the second positioning groove 23 are matched with the shape of the movable end.
[0046] The elastic abutting block 21 is installed on the parting surface of the lower mold 2 and in the sliding stroke range of the row position seat 11, the elastic abutting block 21 is internally provided with the elastic element 17 (such as a spring), so that the movable end can extend to the surface of the lower mold 2 and has a certain elastic expansion capacity, the first positioning groove 22 and the second positioning groove 23 provided at the bottom end of the row position seat 11 are matched with the shape of the movable end of the elastic abutting block 21, in the mold opening and closing process and the row position seat 11 movement process, when the row position seat 11 moves to a specific position, the movable end of the elastic abutting block 21 will be in contact with the corresponding positioning groove, for example, in the mold closing process, the row position seat 11 moves to the mold cavity 5 direction, the movable end of the elastic abutting block 21 is in contact with the first positioning groove 22 and is embedded in the first positioning groove 22 under the action of the elastic force, so as to accurately position the row position seat 11 and prevent displacement of the row position seat 11 caused by external force such as melt pressure in the injection molding process, and when the mold is opened or the row position seat 11 is core-pulling, the row position seat 11 moves reversely, the movable end of the elastic abutting block 21 can cooperate with the second positioning groove 23 again, and the positioning and auxiliary movement of the row position seat 11 are realized again.
[0047] The elastic resisting block 21 is provided with a guide inclined surface 24 at the middle position of the movable end, and when the row position seat 11 approaches the elastic resisting block 21 during movement, the guide inclined surface 24 plays a guiding role, and due to the existence of the guide inclined surface 24, even if the position of the row position seat 11 has a certain deviation, it can be gradually corrected under the elastic force of the elastic resisting block 21 during contact with the guide inclined surface 24, so that the movement path of the row position seat 11 is more accurately directed to the direction of cooperation with the movable end of the elastic resisting block 21, ensuring that the positioning groove and the movable end can be smoothly connected, and improving the reliability and accuracy of the movement and positioning of the row position seat 11.
[0048] Further, the elastic resisting block 21 and the first insert 12 and the second insert 13 are related to each other in position, the elastic resisting block 21 is located on the parting surface of the lower mold 2 and within the sliding stroke range of the row position seat 11, and the first insert 12 and the second insert 13 are respectively connected to one end of the row position seat 11 of the first row position structure 6 and the second row position structure 7 towards the mold cavity 5, when the row position seat 11 is driven to slide by the inclined guide pillar 8, the working states of the first insert 12, the second insert 13 and the elastic resisting block 21 influence each other, for example, during the clamping process, the row position seat 11 drives the first insert 12 and the second insert 13 to move towards the mold cavity 5, and at the same time, the elastic resisting block 21 cooperates with the positioning groove at the bottom of the row position seat 11 to accurately control the position of the row position seat 11, thereby indirectly ensuring that the first insert 12 and the second insert 13 can be accurately connected to form the mold cavity 5 part for product molding, thereby better facilitating product molding.
[0049] In the embodiment of the utility model, the elastic element 17 is a cylindrical spiral spring (telescopic spring).
[0050] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiment should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.
Claims
1. An injection mold that facilitates product molding, characterized in that, The upper die has an upper die core, and the lower die has a lower die core, the upper die and the lower die are in abutting fit to make the upper die core and the lower die core abut each other to form a die cavity for forming a product, and a first row structure and a second row structure are arranged opposite to each other between the upper die and the lower die; The first row structure and the second row structure are respectively provided with an inclined guide column fixed to the upper die, a first guide rail and a second guide rail fixed to the lower die, and a row seat slidably fitted between the first guide rail and the second guide rail, the inclined guide column is in sliding fit with the row seat to drive the row seat to slide in the direction of abutting or separating from the die cavity through the inclined guide column; The row seat of the first row structure is connected with a first insert at one end thereof towards the die cavity, the row seat of the second row structure is connected with a second insert at one end thereof towards the die cavity, and the first insert and the second insert are respectively provided with product profiling structures at one side thereof towards the die cavity, wherein the first insert and the second insert are in elastic abutting fit.
2. The injection mold for facilitating molding of a product according to claim 1, wherein, The first insert extends to form a protruding portion at a fitting end thereof corresponding to the second insert, the second insert is provided with a groove at a fitting end thereof corresponding to the first insert, and the protruding portion is in abutting fit with the groove. An elastic element is arranged in the groove, one end of the elastic element is connected with the groove, and the other end of the elastic element extends out of the groove, wherein the protruding portion is provided with an abutting groove matched with the elastic element.
3. The injection mold for facilitating molding of a product according to claim 2, wherein, The inner wall of the groove is provided with a connecting block, and one end of the elastic element is in clamping fit with the connecting block.
4. The injection mold for facilitating molding of a product according to claim 2 or 3, wherein A sealing ring matched with the protruding portion is arranged at the opening of the groove.
5. The injection mold of claim 1, wherein, An elastic abutting block is arranged on the parting surface of the lower die and in the sliding stroke range of the row seat, the movable end of the elastic abutting block extends to the surface of the lower die, wherein the bottom end of the row seat is provided with a first positioning groove and a second positioning groove matched with the movable end.
6. The injection mold for facilitating molding of a product of claim 5, wherein, The movable end of the elastic abutting block is convex at the middle position thereof, guide inclined surfaces are formed on both sides of the middle convex position, and the first positioning groove and the second positioning groove are matched with the shape of the movable end.
7. The injection mold of claim 2, wherein, The elastic element is a cylindrical coil spring.