Injection mold for automobile parts

Abstract

The utility model relates to the technical field of injection molds, in particular to an automobile part injection mold which comprises a pressing and holding mechanism used for pressing and holding a steel nail to move towards a steel nail groove and a clamping unit used for storing the steel nail, and interference fit is formed between the clamping unit and the steel nail. The lower surface of the pressing and holding mechanism is matched with the upper surface of the steel nail in the clamping unit in an abutting mode, the pressing and holding mechanism is fixedly connected with a guide column, the guide column sequentially penetrates through the pressing and holding mechanism, the clamping unit and the lower die base body, and the guide column is matched with the lower die base body in an inserting mode. When a worker inserts the guide columns into the lower die base body, the clamping unit abuts against the lower die base body, when the worker applies external force to the pressing mechanism, the pressing mechanism can stably drive the guide columns to move downwards, the steel nails on the clamping unit are gradually pressed into the corresponding steel nail grooves in the lower die base body, and therefore installation of the steel nails is achieved. And the working efficiency of steel nail installation is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and particularly to an injection mold for automotive parts. Background Art

[0002] At present, molds are divided into integral forming molds and split forming molds. For some small molds with high requirements for dimensional structure and processing accuracy, the integral forming method cannot be used for forming. Therefore, the split forming method is usually adopted. During operation, a part of the mold matrix is first formed, and then small parts manufactured by high-precision machining are directly installed on the formed matrix to form the entire required mold structure.

[0003] In the prior art, there is a product in which a long and narrow steel nail groove with a small dimensional structure needs to be formed inside. For the mold for manufacturing this product, the integral forming method cannot be used for forming. Therefore, the split forming method needs to be adopted. First, the mold block corresponding to the steel nail groove is precisely machined, and then this mold block is installed in the basic lower mold matrix. However, for this split forming mold, during actual operation, the operator needs to operate the mold to make both the upper mold and the lower mold matrix in the open mold state and stop working. Then, the operator bends down and lies prone on the workbench, manually assembling the mold block for forming the steel nail groove into the lower mold matrix, and the steel nail forms an interference fit with the steel nail groove on the lower mold matrix.

[0004] However, since the number of such mold blocks is large and the structural dimensions are small, it is not easy for the operator to accurately insert the steel nails into the corresponding steel nail grooves. The assembly process is time-consuming and laborious, and there is room for improvement. Summary of the Utility Model

[0005] In order to improve work efficiency, this application provides an injection mold for automotive parts.

[0006] An injection mold for automotive parts provided by this application adopts the following technical solutions:

[0007] An injection mold for automotive parts includes a pressing mechanism for pressing a steel nail to move in the direction of the steel nail groove and a clamping unit for retaining the steel nail. An interference fit is formed between the clamping unit and the steel nail. The lower surface of the pressing mechanism forms an abutting fit with the upper surface of the steel nail inside the clamping unit. A guide post is arranged on the pressing mechanism. The guide post sequentially penetrates the pressing mechanism, the clamping unit, and the lower mold matrix. The guide post is fixedly connected to the pressing mechanism, and the guide post forms a plug-in fit with the lower mold matrix. The steel nail inside the clamping unit forms an interference fit with the steel nail groove on the lower mold matrix.

[0008] By adopting the above technical solution, an interference fit is formed between the clamping unit and the steel nail, ensuring that the steel nail maintains a stable position in the clamping unit and preventing the steel nail from falling off before entering the steel nail groove. When the staff inserts the guiding column into the lower die base, the clamping unit also abuts against the lower die base. When the staff applies an external force to the pressing mechanism, the pressing mechanism can stably drive the guiding column to move downward, and the steel nail on the clamping unit is gradually pressed into the corresponding steel nail groove of the lower die base, thus realizing the installation of the steel nail and greatly improving the working efficiency of steel nail installation.

[0009] Preferably, the clamping unit includes a clamping plate, a clamping block, and an abutting plate. The clamping plate is provided with a clamping embedding main groove and a clamping embedding secondary groove that communicate with each other. The clamping block forms an embedding fit with the clamping embedding main groove, and the abutting plate forms an embedding fit with the clamping embedding secondary groove. The edge of the clamping block is provided with a mating groove that is open and forms an interference fit with the steel nail. The abutting plate is arranged at the opening of the mating groove and forms an abutting fit with the clamping block.

[0010] By adopting the above technical solution, by using the abutting plate that is split at the opening of the mating groove, the abutting plate forms an embedding fit with the clamping embedding secondary groove, and the abutting plate forms an abutting fit with the clamping block, which solves the problem of difficult processing due to the small size of the mating groove that forms an interference fit with the steel nail, thus facilitating the staff to process the mating groove. At the same time, the clamping block is located in the mating groove and forms an interference fit with the steel nail, enabling the steel nail to be efficiently and stably stored in the mating groove and preventing the steel nail from falling off before entering the steel nail groove.

[0011] Preferably, an avoidance hole for avoiding the edge of the clamping block is provided between the clamping plate and the clamping block.

[0012] By adopting the above technical solution, by using the setting of the avoidance hole, it is convenient for the staff to pick up and place the clamping block. At the same time, by using the setting of the avoidance hole, the wear between the edge of the clamping block and the clamping plate is reduced, and the service life of the mold is prolonged.

[0013] Preferably, the pressing mechanism includes a pressing plate and a connecting plate. A detachable connection is formed between the pressing plate and the connecting plate. A thimble is press-fitted on the connecting plate. The end of the thimble away from the connecting plate passes through the mating groove and forms an abutting fit with the upper surface of the steel nail.

[0014] By adopting the above technical solution, by using the fact that one end of the thimble forms an interference fit with the connecting plate and the other end forms an abutting fit with the mating groove, it is ensured that the thimble can stably push the steel nail downward when located in the mating groove.

[0015] Preferably, the guiding column sequentially passes through the pressing plate and the clamping plate from top to bottom, and the guiding column is fixedly connected to the pressing plate.

[0016] By adopting the above technical solution and utilizing the setting of the guide column, not only the precise positioning between the pressing plate and the clamping plate is ensured, but also the overall stability between the pressing plate and the clamping plate during the injection molding process is enhanced, and the error caused by vibration or impact is reduced.

[0017] Preferably, an elastic member, a second matching hole and a fixing bolt are provided between the pressure plate and the clamping plate, the fixing bolt is arranged in the second matching hole, the bolt head of the fixing bolt forms an embedded fit with the second matching hole, and the bolt rod of the fixing bolt is threadedly connected with the clamping plate.

[0018] By adopting the above technical scheme and utilizing the setting of the elastic member, the top pin of the pressing plate can automatically reset after pressing the steel nail into place, and at the same time, the bolt rod of the fixing bolt is threadedly connected with the clamping plate to fix the pressing plate on the clamping plate, so that the pressing plate will not separate from the mold when resetting due to the excessive elasticity of the elastic member.

[0019] Preferably, the pressure plate and the clamping plate are both provided with weight-reducing holes penetrating along the thickness direction.

[0020] By adopting the above technical solution and utilizing the setting of weight-reducing holes, not only the overall weight of the mold is reduced, the energy consumption and cost during the injection molding process are reduced, but it also helps to improve the response speed and flexibility of the fixture.

[0021] Preferably, a buffer plate is detachably connected to the clamping plate, and the buffer plate is symmetrically arranged between the clamping plate and the lower mold base.

[0022] By adopting the above technical solution and utilizing the buffer plate, it helps to provide a shock-absorbing and buffering effect on the mold when the holding mechanism is pressed down, thereby protecting the lower mold base from impact damage and also helping to improve the stability of the injection molding process.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The interference fit between the clamping unit and the steel nail is used to ensure that the steel nail maintains a stable position in the clamping unit, preventing the steel nail from falling off before entering the steel nail groove; when the staff inserts the guide column into the lower mold base, the clamping unit also abuts against the lower mold base. When the staff applies external force to the pressing mechanism, the pressing mechanism can stably drive the guide column to move downward, and the steel nail on the clamping unit is gradually pressed into the corresponding steel nail groove on the lower mold base, thereby realizing the installation of the steel nail, which greatly improves the work efficiency of steel nail installation;

[0025] 2. By setting the elastic member, the gap between the pressing plate and the clamping plate can be adjusted, so that the top pin of the pressing plate can automatically reset after pressing the steel nail in place. At the same time, the bolt rod of the fixing bolt is threadedly connected with the clamping plate to fix the pressing plate on the clamping plate, so that the pressing plate will not be separated from the mold due to the excessive elasticity of the elastic member when resetting;

[0026] 3. The setting of the buffer plate helps to reduce shock and buffer the mold when the holding mechanism is pressed down, thereby protecting the lower mold base from impact damage, and also helps to improve the stability of the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an axonometric diagram mainly showing the overall structure in the embodiment of the present application;

[0028] Figure 2 It is an exploded schematic diagram mainly showing the overall structure in the embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the structure of the clamping assembly mainly embodied in the embodiment of the present application.

[0030] : 1. Pressing mechanism; 11. Pressing plate; 12. Connecting plate; 121. Ejector pin; 13. First matching hole; 131. First step surface; 14. Guide column; 141. Top; 142. Connecting part; 143. Abutment groove; 15. Positioning groove; 151. Tightening bolt; 16. Elastic member; 161. Spring; 17. Second matching hole; 171. Fixing bolt; 172. Second step surface; 18. Weight-reducing hole; 2. Lifting and clamping unit; 21. Lifting plate; 211. Avoidance hole; 22. Clamping assembly; 221. Clamping block; 222. Abutment plate; 223. Clamping embedded main groove; 224. Clamping embedded auxiliary groove; 225. Matching groove; 23. Buffer plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 -Attached Figure 3 This application is described in further detail.

[0032] The embodiment of the present application discloses an injection mold for automobile parts.

[0033] Reference Figure 1 and Figure 2, an injection mold for automotive parts, includes a pressing mechanism 1 for pressing and holding a steel nail to move in the direction of the steel nail groove and a clamping unit 2 for retaining the steel nail. The pressing mechanism 1 is located directly above the clamping unit 2. The pressing mechanism 1 includes a pressing plate 11 and a connecting plate 12. A detachable connection is formed between the pressing plate 11 and the connecting plate 12. In this embodiment, the pressing plate 11 and the connecting plate 12 are connected by bolts in a threaded manner. Thimble pins 121 are symmetrically arranged at both ends of the connecting plate 12. There are eight thimble pins 121, four thimble pins 121 are arranged at any one end of the connecting plate 12, and the four thimble pins 121 are arranged in a rectangular array. One end of any thimble pin 121 forms an interference fit with the connecting plate 12, and the other end of any thimble pin 121 forms a plug-in fit with the clamping unit 2, so that the connection between the thimble pin 121 and the connecting plate 12 and the clamping unit 2 is detachable, facilitating the staff to adjust or replace the thimble pin 121.

[0034] Referring to Figure 2 and Figure 3 , the clamping unit 2 includes a clamping plate 21. Clamping components 22 are symmetrically arranged on the clamping plate 21 along its length direction. Since the structures and connection methods of the two clamping components 22 are the same, one of the clamping components 22 will be taken as an example for elaboration.

[0035] Referring to Figure 2 and Figure 3 , the clamping component 22 includes a clamping block 221, a contact plate 222, and a main clamping embedding groove 223 and a secondary clamping embedding groove 224 opened on the clamping plate 21. The secondary clamping embedding grooves 224 are symmetrically arranged on both sides of the main clamping embedding groove 223, and any one secondary clamping embedding groove 224 is communicated with the main clamping embedding groove 223. Two contact plates 222 are arranged corresponding to the positions and quantities of the secondary clamping embedding grooves 224. The clamping block 221 forms an embedding fit with the main clamping embedding groove 223, and any one contact plate 222 forms an embedding fit with the corresponding secondary clamping embedding groove 224. Matching grooves 225 are opened on the clamping block 221 corresponding to the positions and quantities of the thimble pins 121 at any one end of the connecting plate 12. The matching grooves 225 are open and form an interference fit with the steel nail, so that the steel nail can be efficiently and stably temporarily stored in the matching grooves 225, preventing the steel nail from falling off before entering the steel nail groove of the lower die base.

[0036] Referring to Figure 3 , one end of any thimble pin 121 away from the connecting plate 12 penetrates through the corresponding matching groove 225 and forms a contact fit with the upper surface of the steel nail. Any one contact plate 222 is arranged at the opening of the matching groove 225 and forms a contact fit with the clamping block 221, solving the problem that the matching groove 225 forming an interference fit with the steel nail is difficult to process due to its small size, thus facilitating the staff to process the matching groove 225.

[0037] Referring to Figure 2, avoidance holes 211 are penetratedly formed at the four edges of the clamping plate 21 where the four edges of any clamping block 221 are located in the thickness direction and on both sides of any abutting plate 222 in the width direction. Any avoidance hole 211 communicates with the clamping groove 223. With the arrangement of the avoidance holes 211, it is convenient for the staff to take and place the clamping blocks 221. At the same time, the wear between the edges of the clamping blocks 221 and the clamping plate 21 is reduced, and the service life of the mold is prolonged.

[0038] Refer to Figure 2 , first fitting holes 13 are penetratedly formed along the thickness direction at the four corners of the pressing plate 11. The four first fitting holes 13 are symmetrically arranged in pairs with respect to the length direction of the pressing plate 11. A first stepped surface 131 is arranged in any first fitting hole 13 of the pressing plate 11. A guiding column 14 is arranged between the pressing plate 11 and the clamping plate 21 in the vertical direction. In this embodiment, four guiding columns 14 are arranged. Since the structures and connection methods of the four guiding columns 14 are the same, one of the guiding columns 14 will be taken as an example for description. The guiding column 14 penetrates the pressing plate 11, the clamping plate 21 and the lower mold base from top to bottom in sequence. The guiding column 14 includes a top portion 141, a connecting portion 142 and an abutting groove 143. Both the top portion 141 and the connecting portion 142 are cylindrical and the diameter of the top portion 141 is larger than that of the connecting portion 142. The lower surface of the top portion 141 of the guiding column 14 forms an abutting fit with the first stepped surface 131. The abutting groove 143 is arranged along the circumferential direction of the guiding column 14 and is located between the top portion 141 and the connecting portion 142.

[0039] Refer to Figure 2 , positioning grooves 15 are symmetrically formed on both sides in the length direction of the pressing plate 11. Four positioning grooves 15 are arranged corresponding to the positions and quantities of the guiding columns 14. A tightening bolt 151 is threadedly connected in any positioning groove 15 of the pressing plate 11. Any tightening bolt 151 forms a tightening fit with the abutting groove 143 of the corresponding guiding column 14, so as to realize the firm fixation between the pressing plate 11 and the guiding column 14. Furthermore, when the staff applies an external force to the pressing plate 11, the guiding column 14 can move along with the downward movement of the pressing plate 11.

[0040] Refer to Figure 2 , the connecting portion 142 of any guiding column 14 forms a plug-in fit with the lower mold base. With the arrangement of the guiding column 14, not only the precise positioning between the pressing plate 11 and the clamping plate 21 is ensured, but also the overall stability between the pressing plate 11 and the clamping plate 21 during the injection molding process is enhanced, and the error caused by vibration or impact is reduced.

[0041] Refer to Figure 2An elastic member 16 is provided between the pressing plate 11 and the clamping plate 21. In the present embodiment, the elastic member 16 is configured as a spring 161. The two ends of the spring 161 respectively form abutment fit with the lower surface of the pressing plate 11 and the upper surface of the clamping plate 21, so that the ejector pin 121 of the pressing plate 11 can automatically reset after pressing the steel nail into place.

[0042] Reference Figure 2 The pressing plate 11 is symmetrically provided with second matching holes 17 along its thickness direction. A fixing bolt 171 and a second step surface 172 are provided in any second matching hole 17 of the pressing plate 11. The bolt head of any fixing bolt 171 forms an abutment fit with the second step surface 172. The bolt rod of any fixing bolt 171 is threadedly connected with the clamping plate 21, thereby fixing the pressing plate 11 on the clamping plate 21, and the pressing plate 11 will not separate from the mold due to the excessive elasticity of the elastic member 16 when resetting.

[0043] Reference Figure 2 A buffer plate 23 is threadedly connected to the clamping plate 21 along its length direction. The buffer plate 23 is symmetrically arranged between the clamping plate 21 and the lower mold base. The arrangement of the buffer plate 23 helps to provide shock absorption and buffering for the mold when the pressing mechanism 1 is pressed down, thereby protecting the lower mold base from impact damage, and also helps to improve the stability of the injection molding process.

[0044] Reference Figure 2 The pressure plate 11 and the clamping plate 21 are both provided with weight-reducing holes 18 along the thickness direction. The setting of the weight-reducing holes 18 not only reduces the overall weight of the mold, reduces energy consumption and cost during the injection molding process, but also helps to improve the response speed and flexibility of the fixture.

[0045] The implementation principle of the embodiment of the present application is as follows: the staff first controls the upper mold and the lower mold base to be in the mold opening state and stops working, then inserts the eight steel nails into the corresponding matching grooves 225 respectively, and then inserts the four guide columns 14 into the lower mold base respectively. When the staff applies external force to the pressing mechanism 1, the pressing mechanism 1 can stably drive the guide column 14 to move downward, and at the same time, the steel nails on the clamping unit 2 are gradually pressed by the ejector pin 121 into the steel nail groove corresponding to the lower mold base, thereby realizing the installation of the steel nails and greatly improving the work efficiency of the steel nail installation.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold for automotive parts, characterized in that: It includes a pressing mechanism (1) for pressing the steel nail to move towards the steel nail groove and a clamping unit (2) for retaining the steel nail. An interference fit is formed between the clamping unit (2) and the steel nail. The lower surface of the pressing mechanism (1) forms a butt joint with the upper surface of the steel nail in the clamping unit (2). A guide post (14) is arranged on the pressing mechanism (1), and the guide post (14) sequentially penetrates through the pressing mechanism (1), the clamping unit (2) and the lower die base body. The guide post (14) is fixedly connected with the pressing mechanism (1), and the guide post (14) forms a plug-in fit with the lower die base body.

2. The injection mold for automotive parts according to claim 1, wherein: The clamping unit (2) includes a clamping plate (21), a clamping block (221) and an abutting plate (222). A clamping embedding main groove (223) and a clamping embedding secondary groove (224) which are communicated with each other are formed on the clamping plate (21). The clamping block (221) forms an embedding fit with the clamping embedding main groove (223), and the abutting plate (222) forms an embedding fit with the clamping embedding secondary groove (224). A mating groove (225) which is open and forms an interference fit with the steel nail is formed on the edge of the clamping block (221). The abutting plate (222) is arranged at the opening of the mating groove (225) and forms a butt joint with the clamping block (221).

3. The injection mold for automotive parts according to claim 2, characterized in that: An avoidance hole (211) for avoiding the edge of the clamping block (221) is arranged between the clamping plate (21) and the clamping block (221).

4. The injection mold for automotive parts according to claim 2, characterized in that: The pressing mechanism (1) includes a pressing plate (11) and a connecting plate (12). A detachable connection is formed between the pressing plate (11) and the connecting plate (12). A thimble (121) is in interference fit on the connecting plate (12). The end of the thimble (121) far away from the connecting plate (12) penetrates through the mating groove (225) and forms a butt joint with the upper surface of the steel nail.

5. The injection mold for an automotive part according to claim 4, characterized in that: The guide post (14) sequentially penetrates through the pressing plate (11) and the clamping plate (21) from top to bottom, and the guide post (14) is fixedly connected to the pressing plate (11).

6. The injection mold for automotive parts according to claim 4, wherein: An elastic member (16), a second mating hole (17) and a fixing bolt (171) are arranged between the pressing plate (11) and the clamping plate (21). The fixing bolt (171) is arranged in the second mating hole (17). The bolt head of the fixing bolt (171) forms an embedding fit with the second mating hole (17), and the bolt rod of the fixing bolt (171) is threadedly connected with the clamping plate (21).

7. An injection mold for automotive parts according to claim 4, characterized in that: Weight-reducing holes (18) are arranged through the pressing plate (11) and the clamping plate (21) along the thickness direction.

8. The injection mold for automotive parts according to claim 2, characterized in that: A buffer plate (23) is detachably connected to the clamping plate (21), and the buffer plate (23) is symmetrically arranged between the clamping plate (21) and the lower die base body.

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