Sealing strip injection mold

Abstract

The utility model belongs to the field of production and processing of sealing strips, and specifically discloses a sealing strip injection mold, including a fixed mold and a movable mold, the fixed mold and the movable mold are all L-shaped, one side of the fixed mold and the movable mold are fitted, a support mold is arranged between the other side of the fixed mold and the movable mold, and a molding space for molding the sealing strip is formed between the fixed mold, the movable mold and the support mold; a core rod for molding the bubble tube part of the sealing strip is installed on the support mold, and a first molding part, a strip block and a second molding part are arranged on the core rod in sequence along the direction from the movable mold to the fixed mold, the first molding part is a convex mold, and the second molding part is a concave mold corresponding to the first molding part. The solution of the utility model can solve the problem that the original height of the sealing strip will be lost when the core-pulling hole is bonded.

Description

Technical Field

[0001] The utility model belongs to the field of sealing strip production and processing, and specifically relates to a sealing strip injection mold. Background Art

[0002] Since the sealing strip is at the opening and closing position of the car door and will be squeezed when the car door is opened and closed, a bubble tube part is provided in the middle of the sealing strip. The bubble tube part can shrink and deform when squeezed, and can recover after the squeezing force disappears. When the sealing strip is injection molded, it is necessary to set a mold for molding the outer shape of the sealing strip and a core rod for molding the bubble tube part. The core rod is usually connected to the mold, so a strip-shaped core-pulling hole is left on the sealing strip. After the sealing strip is formed, the core rod is taken out of the sealing strip through the core-pulling hole.

[0003] In the actual design process, the larger the size of the core pulling hole is designed to be, the higher the connection strength between the core rod and the mold will be, the longer the service life will be, and the smoother the demoulding will be during production. However, the increase in the size of the core pulling hole will also lead to the weakening of the strength of this part of the sealing strip, which may cause defects such as falling off during later loading, causing wind noise, and failure of wind and water resistance.

[0004] Based on the above problems, patent CN201811627046.0 discloses a sealing strip joint, i.e., its injection molding process, which can ensure the use effect of the sealing strip by locally widening the end and middle of the core-pulling hole to meet the design strength of the core rod. However, there are still problems: after the sealing strip is formed, the core-pulling hole needs to be bonded to meet the strength of the sealing strip. Even if the core-pulling hole is designed to be small, the original height of the sealing strip will be lost to a certain extent. The locally widened position of the core-pulling hole cannot be bonded, which will also affect the strength of the sealing strip to a certain extent. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sealing strip injection mold to solve the problem that after the sealing strip is formed, the core holes need to be glued to meet the strength of the sealing strip, which will lose the original height of the sealing strip to a certain extent.

[0006] According to the embodiment of the utility model, the utility model adopts the following technical solution:

[0007] The sealing strip structure comprises a fixed mold and a movable mold, both of which are L-shaped, one side of the fixed mold is fitted with the movable mold, a supporting mold is arranged between the other sides of the fixed mold and the movable mold, and a molding space for molding the sealing strip is formed between the fixed mold, the movable mold and the supporting mold; a core rod for molding the bubble tube part of the sealing strip is installed on the supporting mold, and a first molding part, a strip block and a second molding part are arranged on the core rod in sequence along the direction from the movable mold to the fixed mold, the first molding part is a convex mold, and the second molding part is a concave mold corresponding to the first molding part.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The strip block is used to form a core-pulling hole on the sealing strip, and a first molding part and a second molding part are designed on both sides of the strip block. If the first molding part is a punch, a hole (i.e., a support hole) having the same shape as the first molding part can be formed on one side of the core-pulling hole, which is equivalent to locally widening the core-pulling hole. During molding, the connection strength requirements of the core rod and the support mold are met.

[0010] In addition, if the second molding part is a concave mold, a portion protruding from the sealing strip (i.e., a buckle) can be molded on the other side of the core pulling hole, and the second molding part corresponds to the first molding part. After the sealing strip is formed, the buckle can be bent and inserted into the support hole to fill the vacancy in the support hole, and the support hole is supported by the buckle.

[0011] By using the sealing strip injection mold of this solution, the molded sealing strip no longer needs to be glued with the core-pulling hole, the original height of the sealing strip will not be lost, and the steps of gluing the core-pulling hole are reduced, thereby improving production efficiency and saving production costs.

[0012] Furthermore, the first forming part has a Y-shaped cross section, and includes a first connecting part connected or in contact with the bar block and a V-shaped clamping forming part, and the second forming part includes a Y-shaped forming area with a cross section consistent with the cross section of the first forming mold.

[0013] Furthermore, a limiting forming block is fixed on the first connecting portion and / or the clamping forming portion, and the second forming portion includes a limiting forming groove corresponding to the limiting forming block.

[0014] Furthermore, the molding area includes an upper molding groove, a convex block is fixed on the fixed mold, a lower molding groove is formed on the convex block, and a molding area corresponding to the first molding part is formed between the upper molding groove and the lower molding groove.

[0015] Furthermore, the second forming portion includes a second connecting portion and a V-shaped supporting forming portion, the second connecting portion includes a first connecting section and a second connecting section located between the first connecting section and the supporting forming portion; the protrusion is provided with a forming inclined surface with the side close to the first connecting section as the high end and the side close to the supporting forming portion as the low end.

[0016] Furthermore, a supporting inclined surface is provided on one side of the protrusion facing away from the downward forming groove, and the inclination direction of the supporting inclined surface is consistent with that of the forming inclined surface.

[0017] Furthermore, the end of the projection is arc-shaped.

[0018] Furthermore, the first forming part and the second forming part can be detachably connected to the supporting mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the sealing strip structure to be formed by the sealing strip injection mold according to the embodiment of the utility model.

[0020] Figure 2 for Figure 1 Enlarged view of part A.

[0021] Figure 3 The figure is a schematic diagram of the overall structure of the sealing strip injection mold according to the embodiment of the utility model.

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the middle support mold and the fixed mold.

[0023] Figure 5 It is a structural schematic diagram of a core rod, a first molding part, and a second molding part in a sealing strip injection mold according to an embodiment of the utility model.

[0024] Figure 6 It is a structural schematic diagram of a core rod, a first molding part, and a second molding part in a sealing strip injection mold according to an embodiment of the utility model.

[0025] Figure 7 It is a structural schematic diagram of a fixed mold in a sealing strip injection mold according to an embodiment of the utility model.

[0026] Figure 8 It is a structural schematic diagram of a fixed mold in a sealing strip injection mold according to an embodiment of the utility model.

[0027] In the figure: 1. sealing strip body; 2. bubble tube part; 3. supporting hole; 4. buckle; 5. limiting strip; 6. clamping groove; 7. arc groove; 8. third connecting section; 9. fourth connecting section; 10. third connecting part; 11. supporting part; 12. wedge surface; 13. core rod; 14. second connecting block; 15. first connecting block; 16. limiting forming block; 17. strip block; 18. upper forming groove; 19. movable mold; 20. fixed mold; 21. supporting mold; 22. forming space; 23. core pulling hole; 24. first connecting part; 25. clamping forming part; 26. forming slope; 27. convex block; 28. lower forming groove; 29. ​​supporting slope; 30. first connecting section; 31. second connecting section; 32. limiting forming groove; 33. supporting forming part; 34. second connecting part. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below with reference to the accompanying drawings, and specific implementation methods are given.

[0029] like Figure 3 , Figure 4As shown, the sealing strip injection mold includes a fixed mold 20 and a movable mold 19, the fixed mold 20 and the movable mold 19 are both L-shaped, one side of the fixed mold 20 and the movable mold 19 are fitted together, and a support mold 21 is provided between the fixed mold 20 and the movable mold 19 on the other side, and a sealing strip (i.e., a sealing strip) is formed between the fixed mold 20, the movable mold 19, and the support mold 21. Figure 1 As shown in the molding space 22 of the sealing strip body 1), during the actual injection molding process, the supporting mold 21 is installed on the fixed mold 20 by pin connection, and then the movable mold 19 is clamped onto the fixed mold 20, and then injection molding can be started into the molding space 22 to form the sealing strip structure.

[0030] Combination Figure 5 , Figure 6 As shown, the support mold 21 is equipped with a Figure 1 The core rod 13 of the bubble tube part 2 is shown, and a first molding part, a strip block 17 and a second molding part are sequentially arranged on the core rod 13 along the direction from the movable mold 19 to the fixed mold 20. The first molding part is a convex mold, and the second molding part is a concave mold corresponding to the first molding part.

[0031] Specifically, the first molding portion has a Y-shaped cross section, and the first molding portion includes a first connecting portion 24 connected or in contact with the bar block 17 and a V-shaped clamping molding portion 25. Specifically, the first molding portion includes a first connecting block 15 connecting the core rod 13 and the support mold 21, and the first connecting block 15 is Y-shaped. The first molding portion is used to mold Figure 1 The support holes 3 are shown.

[0032] The second molding part includes a Y-shaped molding area with a cross section consistent with the cross section of the first molding part. Specifically, the second molding part includes a second connecting block 14 for connecting the core rod 13 and the support mold 21 and an upper molding groove 18 provided on the second connecting block 14. The upper molding groove 18 is the molding area. The upper molding groove 18 includes a second connecting portion 34 and a V-shaped support molding portion 33. The second connecting portion 34 includes a first connecting segment 30 and a second connecting segment 31 located between the first connecting segment 30 and the support molding portion 33.

[0033] Combination Figure 7 , Figure 8 As shown, a convex block 27 is fixed on the fixed mold 20, and a lower molding groove 28 is formed on the convex block 27. A molding area corresponding to the first molding portion is formed between the upper molding groove 18 and the lower molding groove 28. Figure 7 Taking the direction shown in FIG. 2 as an example, the lower molding groove 28 includes a molding slope 26 with a side close to the first connecting section 30 as a high end and a side close to the supporting molding portion 33 as a low end. The second molding portion is used to mold such as Figure 1In the buckle 4 shown, the molding slope 26 is used to mold the fourth connecting section 9 on the buckle 4. A support slope 29 is provided on the side of the projection 27 facing away from the molding groove 28. The inclination direction of the support slope 29 is consistent with that of the molding slope 26. The support slope 29 is used to mold the wedge surface 12 on the sealing strip body 1. The end of the projection 27 is arc-shaped and is used to mold the arc groove 7 between the third connecting section 8 and the fourth connecting section 9 on the buckle 4.

[0034] The first connection portion 24 and / or the clamping forming portion 25 is fixed with a limited forming block 16, and the second forming portion includes a limited forming groove 32 corresponding to the limited forming block 16. Specifically, the first connection block 15 is fixed with a limited forming block 16, and the limited forming block 16 is used to form Figure 1 The card slot 6 shown in the figure, the limiting forming groove 32 is used to form Figure 1 The limiting strip 5 shown.

[0035] The strip block 17 is fixed on the second connecting block 14. In the actual design process, the first forming part, the second forming part and the core rod 13 are integrally formed, that is, the first connecting block 15 and the core rod 13 are integrally formed, and the strip block 17 is integrally formed between the second connecting block 14 and the core rod 13 to avoid too many parts affecting the sealing strip molding effect.

[0036] In order to facilitate mold removal and quick maintenance and replacement, the first molding part and the second molding part can be detachably connected to the support mold 21. Specifically, the first connecting block 15 and the second connecting block 14 can be connected to the support mold 21 by bolt connection, pin connection, etc.

[0037] In specific use, after the mold is closed, the core rod 13 is located in the molding space 22. Since the core rod 13 occupies part of the molding space 22, the bubble tube part 2 of the sealing strip structure can be formed at the core rod 13. When removing the mold, first remove the movable mold 19, then release the connection between the first connecting block 15, the second connecting block 14 and the supporting mold 21. After removing the supporting mold 21, the core rod 13 can be pulled out from the core-pulling hole 23 of the bubble tube part 2 by pulling the first connecting block 15 or the second connecting block 14.

[0038] The sealing strip injection mold disclosed in this embodiment is used to form the sealing strip structure described below, specifically, Figure 1 As shown, the sealing strip structure includes a sealing strip body 1, a bubble tube portion 2 disposed on the sealing strip body 1, and a core-pulling hole 23 opened on the bubble tube portion 2. Taking the corner of the sealing strip as an example, the core-pulling hole 23 is opened on the arc-shaped concave side of the sealing strip corner. The core-pulling hole 23 is in a strip-shaped cross section, and at least one supporting hole 3 is opened on one side of the core-pulling hole 23. A buckle 4 is provided on the sealing strip body 1 on the other side of the core-pulling hole 23. The buckle 4 is used to be bent and snapped with the supporting hole 3 to Figure 1As shown in the figure, the support hole 3 is opened on the upper side of the core pulling hole 23, and multiple support holes 3 are evenly distributed along the length direction of the core pulling hole 23. The buckle 4 is integrally formed on the sealing strip body 1, and the buckle 4 is located on the lower side of the core pulling hole 23.

[0039] The cross-section of the support hole 3 is Y-shaped, and the support hole 3 includes a connecting portion connected to the core pulling hole 23 and a V-shaped clamping portion. The cross-section of the buckle 4 is Y-shaped, which is consistent with the cross-section of the support hole 3. After the buckle 4 is inserted into the support hole 3, the buckle 4 can support the clamping portion upward. Since the clamping portion is V-shaped, the buckle 4 can form a V-shaped triangular support for the support hole 3, and the support is more stable.

[0040] A card slot 6 is provided on the card connection portion and / or the connecting portion, and a limit strip 5 for being inserted into the card slot 6 is provided on the buckle 4. Figure 1 As shown in the example, in this embodiment, the slot 6 is provided on the snap-fit ​​part. Since the sealing strip is deformable, when the snap-fit ​​4 is inserted into the support hole 3, the limit strip 5 can be squeezed and deformed. When the limit strip 5 moves to the slot 6, it can restore its original shape and be inserted into the slot 6, so as to realize the snap-fit ​​self-locking of the snap-fit ​​4 and the support hole 3. Of course, in the actual design process, the slot 6 can also be provided on the snap-fit ​​4, and the limit strip 5 can be designed on the inner wall of the support hole 3, as long as the snap-fit ​​of the snap-fit ​​4 and the support hole 3 is realized.

[0041] Combination Figure 2 As shown, the buckle 4 includes a third connecting portion 10 for connecting to the sealing strip body 1 and a V-shaped supporting portion 11. The third connecting portion 10 includes a third connecting segment 8 connected to the sealing strip body 1 and a fourth connecting segment 9 located between the third connecting segment 8 and the supporting portion 11. The thickness of the fourth connecting segment 9 increases along the direction from the third connecting segment 8 to the supporting portion 11. With this design, the thickness of the connecting end of the fourth connecting segment 9 and the third connecting segment 8 is designed to be relatively small, which can facilitate the buckle 4 to bend and insert into the supporting hole 3, while the thickness of the connecting end of the fourth connecting segment 9 and the supporting portion 11 is designed to be relatively large, which can avoid the overall small thickness of the third connecting portion 10 affecting the strength.

[0042] Combination Figure 2 As shown, a groove is provided on the sealing strip body 1, and the groove has a wedge surface 12, and the side of the wedge surface 12 facing away from the core-pulling hole 23 is its lower end, and the third connecting section 8 is connected to the wedge surface 12. The cross section of the third connecting section 8 is a right triangle, and the hypotenuse of the right triangle is connected to the wedge surface 12, and one right-angled side of the right triangle is connected to the fourth connecting section 9, and the thickness of the right-angled side is greater than the thickness of the end of the fourth connecting section 9. Through the design of the wedge surface 12, after the buckle 4 is bent and inserted into the support hole 3, the wedge surface 12 has an upward supporting effect on the buckle 4, thereby improving the supporting effect of the buckle 4 on the support hole 3.

[0043] An arc groove 7 is provided between the side of the fourth connecting segment 9 facing away from the support hole 3 and the third connecting segment 8. Through the design of the arc groove 7, when the fourth connecting segment 9 is bent relative to the third connecting segment 8, the arc portion of the arc groove 7 is stretched and expanded, thereby avoiding the problem of the buckle 4 being easily reset after being stressed due to direct bending of the two.

[0044] After the sealing strip is formed and the mold is removed, the buckle 4 can be bent upward and inserted into the support hole 3 to fill the vacancy of the support hole 3. The buckle 4 supports the support hole 3 by clamping, and there is no need to glue the core-pulling hole 23, so the original height of the sealing strip will not be lost, and the steps of gluing the core-pulling hole 23 are reduced, thereby improving production efficiency and saving production costs.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. The sealing strip injection mold includes a fixed mold and a movable mold, and is characterized by: The fixed mold and the movable mold are both L-shaped, one side of the fixed mold is fitted with the movable mold, and a supporting mold is arranged between the other sides of the fixed mold and the movable mold, and a molding space for molding the sealing strip is formed between the fixed mold, the movable mold and the supporting mold; a core rod for molding the bubble tube part of the sealing strip is installed on the supporting mold, and a first molding part, a strip block and a second molding part are arranged on the core rod in sequence along the direction from the movable mold to the fixed mold, the first molding part is a convex mold, and the second molding part is a concave mold corresponding to the first molding part.

2. The sealing strip injection mold according to claim 1, characterized in that: The first forming part has a Y-shaped cross section, and includes a first connecting part connected or in contact with the bar block and a V-shaped clamping forming part. The second forming part includes a Y-shaped forming area whose cross section is consistent with the cross section of the first forming mold.

3. The sealing strip injection mold according to claim 2, characterized in that: A limiting forming block is fixed on the first connecting portion and / or the clamping forming portion, and the second forming portion includes a limiting forming groove corresponding to the limiting forming block.

4. The sealing strip injection mold according to claim 2, characterized in that: The molding area includes an upper molding groove, a convex block is fixed on the fixed mold, a lower molding groove is formed on the convex block, and a molding area corresponding to the first molding part is formed between the upper molding groove and the lower molding groove.

5. The sealing strip injection mold according to claim 4, characterized in that: The second forming part includes a second connecting part and a V-shaped supporting forming part, the second connecting part includes a first connecting section and a second connecting section located between the first connecting section and the supporting forming part; the protrusion is provided with a forming inclined surface with the side close to the first connecting section as the high end and the side close to the supporting forming part as the low end.

6. The sealing strip injection mold according to claim 5, characterized in that: A supporting inclined surface is provided on one side of the protrusion facing away from the downward forming groove, and the inclination direction of the supporting inclined surface is consistent with that of the forming inclined surface.

7. The sealing strip injection mold according to claim 5, characterized in that: The end of the projection is arc-shaped.

8. The sealing strip injection mold according to claim 1, characterized in that: The first forming part and the second forming part can be detachably connected to the supporting mold.

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