An impact head for mold water sealing mechanism

Abstract

The present invention discloses an impact head for a mold water sealing mechanism. It includes a guide head, which contacts with a pipe fitting and squeezes and deforms the inner wall and the axial end of the pipe fitting; the side of the guide head is an oblique cone surface, and the cross-sectional profile size of the oblique cone surface gradually decreases in the direction close to the centroid of the pipe fitting, and the cross-sectional areas of the top and root of the guide head are respectively smaller and larger than the cross-sectional area of ​​the inner wall of the pipe fitting; a step rod is arranged on the side of the guide head away from the pipe fitting, and the side of the step rod is a first side elevation and a second side elevation in the direction away from the pipe fitting; the first side elevation and the second side elevation intersect vertically at the junction thereof to form a first step surface, and the first step surface is perpendicular to the longitudinal direction of the impact head; in terms of cross-sectional area, the first side elevation is smaller than the second side elevation, and the second side elevation is smaller than the outer wall of the pipe fitting. This invention is used to impact and deform the two ends of the pipe fitting to obtain a good sealing effect, forming a rich and curved sealing surface.

Description

Technical Field

[0001] The invention relates to the field of mold accessories, and in particular to an impact head used for a mold water sealing mechanism. Background Art

[0002] There is a skeleton inside the car dashboard, and the skeleton of the car dashboard of the finished car is covered. The skeleton of the car dashboard is a functional part. The skeleton generally provides assembly positions for various buttons on the dashboard, so the skeleton of the dashboard needs to have a certain structural strength and at the same time branch out into several extension arms. From the perspective of lightweight design, the main body of the dashboard skeleton can be a metal pipe, and the numerous branches on the dashboard skeleton can be plastic parts. The semi-finished product of this metal pipe is a conventional pipe with the same cross-sectional shape everywhere, but because of the different functional requirements of each part, the finished pipe is partially specialized. One method is to pass high-pressure liquid into the pipe, and then match it with an external mold to finally expand the pipe into the required shape. During the entire operation cycle, the sealing of the shaft end of the pipe is critical. Insufficient sealing can easily cause leakage and insufficient pressure inside the pipe. Summary of the invention

[0003] The problem to be solved by the present invention is to provide an impact head for a mold water sealing mechanism, which impacts and deforms the two ends of a pipe to obtain a good sealing effect and form a rich and curved sealing surface.

[0004] In order to solve the above problems, the present invention provides an impact head for a mold water sealing mechanism. In order to achieve the above purpose, the technical solution adopted by the present invention to solve its technical problems is:

[0005] An impact head for a mold water sealing mechanism comprises: a guide head, the impact head is composed of an integrated guide head and a step rod, the impact head contacts a pipe fitting and squeezes and deforms the inner wall and the shaft end of the pipe fitting, and the respective longitudinal lines of the impact head and the pipe fitting coincide with each other; the side surface of the guide head is an oblique cone surface, the cross-sectional profile size of the oblique cone surface gradually decreases in the direction close to the centroid of the pipe fitting, and the cross-sectional areas of the top and the root of the guide head are respectively smaller than and larger than the cross-sectional area of ​​the inner wall of the pipe fitting; the step rod is arranged on the side of the guide head away from the pipe fitting, and the side surface of the step rod is a first side elevation and a second side elevation in sequence in the direction away from the pipe fitting; a first step surface is perpendicularly intersected at the junction of the first side elevation and the second side elevation, and the first step surface is perpendicular to the longitudinal line direction of the impact head; the cross-sectional area of ​​the first side elevation is smaller than the cross-sectional area of ​​the second side elevation, the cross-sectional area of ​​the first side elevation is larger than the cross-sectional area of ​​the inner wall of the pipe fitting, and the cross-sectional area of ​​the second side elevation is smaller than the cross-sectional area of ​​the outer wall of the pipe fitting.

[0006] The beneficial effect of adopting the above technical solution is: a good sealing effect is obtained by appropriately impacting and deforming the two ends of the pipe fitting. The deformation part of the pipe fitting is small and does not affect the main use function of the pipe fitting. The fit between the impact head and the pipe fitting is strengthened during the impact deformation process; after the impact is completed, the stress of the material also allows a certain extrusion force between the two, further improving the sealing of the two; at the same time, due to the special outer wall shape of the impact head, the envisioned sealing fitting surface and fitting area can be manufactured, further improving the sealing of the two.

[0007] The guide head mainly guides the impact head into one end of the pipe to ensure the longitudinal overlap between the pipe and the impact head. The root thickness of the guide head is slightly larger than the inner wall of the pipe. It uses its own wedge principle to initially deform the pipe and can use a small extrusion force to apply impact deformation to the pipe.

[0008] The step rod mainly acts on the junction between the axial end of the pipe fitting and the inner wall of the pipe fitting. After deformation, this place will form a negative angle, which will increase two sealing surfaces, that is, increase two mutually perpendicular sealing surfaces. This not only extends the gap path from the inner cavity of the pipe fitting to the outside, but also further bends the gap path, further strengthening the sealing degree of the two. The shape of the guide head and the step rod will not affect the subsequent separation of the impact head and the pipe fitting.

[0009] As a further improvement of the present invention, the second side surface is further provided with a third side surface in the direction away from the pipe fitting, the third side surface is parallel to the longitudinal direction of the impact head, and a second step surface is perpendicularly intersected at the junction of the second side surface and the third side surface, and the second step surface contacts the axial end of the pipe fitting.

[0010] The beneficial effect of adopting the above technical solution is that the second step surface can also play a certain sealing effect, and at the same time the second step surface also plays a stopping effect to control the penetration distance of the impact head.

[0011] As a further improvement of the present invention, the impact head has a flat end surface on the side facing the centroid of the pipe, a convex curved fillet is provided at the junction of the flat end surface and the oblique cone surface, and the oblique cone surface is tangently connected to the first side surface through an outer fillet.

[0012] The beneficial effects of adopting the above technical solution are: the rounded corners of the convex curved surface further facilitate the guide head to enter the inner cavity of the pipe. The rounded transition between the oblique cone surface and the first side elevation surface can reduce the resistance during the initial impact deformation.

[0013] As a further improvement of the present invention, the cross-sectional profiles of the inclined cone surface, the first side elevation surface, and the second side elevation surface are the same; the cross-sectional profile of the first side elevation surface is the cross-sectional profile of the inner wall of the pipe that is offset 0.1 mm laterally outward along the impact head; the cross-sectional profile of the third side elevation surface is the cross-sectional profile of the outer wall of the pipe that is offset 0.2 mm laterally inward along the impact head; and the offset between the cross-sectional profile of the second side elevation surface and the cross-sectional profile of the first side elevation surface along the transverse direction of the impact head is half of the wall thickness of the pipe.

[0014] The beneficial effects of adopting the above technical solution are: the selection of numerical values ​​meets the needs of actual production, the resistance of the entire impact deformation is controlled within an acceptable range, the deformation size of the pipe fittings is also controlled within the range accepted by science and technology, and the pipe fittings will not be torn by impact.

[0015] As a further improvement of the present invention, in the longitudinal section profile of the impact head, the angle between the straight line where the oblique cone surface is located and the straight line where the first side elevation surface is located is 170°.

[0016] The beneficial effect of adopting the above technical solution is that the obtuse angle is large enough to reduce the resistance during the initial impact deformation, and the resistance does not increase suddenly.

[0017] As a further improvement of the present invention, the longitudinal length of the second side elevation is smaller than the longitudinal length of the first side elevation, and the longitudinal length of the first side elevation is smaller than the longitudinal length of the oblique cone surface.

[0018] The beneficial effect of adopting the above technical solution is that when the first step faces the pipe fitting for stamping, the resistance generated is relatively large, so the length of the second side elevation should not be too large.

[0019] As a further improvement of the present invention, the boundary line of the oblique cone surface and the rounded corners of the convex curved surface constitutes a rounded rectangular outline. There are four arcs at the four corners of the rounded rectangular outline, which are divided into two first arcs, one second arc, and one third arc according to the curvature of the arcs. The curvatures of the first arc, the second arc, and the third arc gradually decrease, and the two first arcs are two adjacent rounded corners in the rounded rectangular outline.

[0020] The beneficial effect of adopting the above technical solution is that the rounded rectangular outline is not a conventional axisymmetric figure. The first arc, the second arc, and the third arc of different curvature also represent the degree of concavity and convexity at the four corners of the impact head. The larger the curvature, the sharper it is, and it will first contact the inner wall of the pipe. This design prevents the four corners of the impact head from contacting the pipe at the same time, which can reduce the resistance peak during stamping deformation.

[0021] As a further improvement of the present invention, the hardness of the impact head is greater than the hardness of the pipe.

[0022] The beneficial effect of adopting the above technical solution is that the hardness of the impact head must be hard enough to deform the pipe fitting while the impact head itself deforms slightly.

[0023] As a further improvement of the present invention, a longitudinal through hole is provided at the center line of the impact head itself, and the cross-sectional profile of the through hole is circular.

[0024] The beneficial effect of adopting the above technical solution is that the inner wall contour of the through hole can always be a regular circle, which is convenient for sealing connection with various common pipeline parts, and the impact head is convenient for sealing with the inner wall of the pipe on all sides, and it also has the ability to inject or discharge liquid into the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a front view of an embodiment of the punch head of the present invention;

[0027] Figure 2 is an AA cross-sectional view of an embodiment of a punch head of the present invention;

[0028] Figure 3 It is a partial enlarged view of position B of an embodiment of the punch head of the present invention;

[0029] Figure 4 It is a right side view of one embodiment of the punch head of the present invention;

[0030] Figure 5 It is an embodiment of the punch head of the present invention;

[0031] Figure 6 1 is a CC cross-sectional view of an embodiment of the punch head of the present invention;

[0032] Figure 7 is a top view of an embodiment of a punch head of the present invention;

[0033] Figure 8 It is a partial enlarged view of the D portion of one embodiment of the punch head of the present invention;

[0034] Fig. 9 is a stereoscopic diagram of an embodiment of a punch head of the present invention;

[0035] Fig.10 is a three-dimensional diagram of an embodiment of an extension rod of the present invention;

[0036] Fig.11 is a stereogram of an embodiment of an impact head of the present invention;

[0037] Fig.12 is a stereogram of an embodiment of an impact head of the present invention;

[0038] Fig.13 It is a three-dimensional diagram of an embodiment of a buffer ring of the present invention;

[0039] Fig.14 It is a structural schematic diagram of an implementation mode of the water sealing mechanism of the present invention;

[0040] Fig.15 It is an application schematic diagram of an implementation mode of the impact head of the present invention;

[0041] Fig.16 It is an application schematic diagram of an implementation mode of the impact head of the present invention;

[0042] Fig.17 It is a schematic application diagram of an implementation mode of the impact head of the present invention.

[0043] 1-linear cylinder; 2-base; 3-extension rod; 4-buffer ring; 5-impact head; 6-flat surface; 7-first water outlet; 8-through flow channel; 9-second water outlet; 10-step hole; 11-through cavity; 12-through hole; 13-blind hole; 14-annular step surface; 15-covering section; 16-exposed section; 17-convex edge; 18-convex curved surface fillet; 19-oblique cone surface; 20-first side elevation; 21-second side elevation; 22-third side elevation; 23-first step surface; 24-second step surface; 25-outer fillet; 26-piston; 27-pipe fitting; 28-first arc; 29-second arc; 30-third arc; 31-first sealing surface; 32-second sealing surface; 33-third sealing surface; 34-fourth sealing surface. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with specific embodiments:

[0045] In order to achieve the purpose of the present invention, an impact head for a mold water sealing mechanism includes: a guide head, the impact head 5 is composed of an integrated guide head and a step rod, the impact head 5 contacts the pipe 27 and squeezes and deforms the inner wall and the axial end of the pipe 27, and the respective longitudinal directions of the impact head 5 and the pipe 27 coincide with each other; the side of the guide head is an inclined cone surface 19, the cross-sectional profile size of the inclined cone surface 19 gradually decreases in the direction close to the centroid of the pipe 27, and the cross-sectional areas of the top and root of the guide head are respectively smaller and larger than the cross-sectional area of ​​the inner wall of the pipe 27; the step rod is arranged on the guide head. On the side of the guide head facing away from the pipe fitting 27, the side surfaces of the step rod are the first side vertical surface 20 and the second side vertical surface 21 in sequence along the direction away from the pipe fitting 27; a first step surface 23 is perpendicularly intersected at the junction of the first side vertical surface 20 and the second side vertical surface 21, and the first step surface 23 is perpendicular to the longitudinal direction of the impact head 5; the cross-sectional area of ​​the first side vertical surface 20 is smaller than the cross-sectional area of ​​the second side vertical surface 21, the cross-sectional area of ​​the first side vertical surface 20 is larger than the cross-sectional area of ​​the inner wall of the pipe fitting 27, and the cross-sectional area of ​​the second side vertical surface 21 is smaller than the cross-sectional area of ​​the outer wall of the pipe fitting 27.

[0046] The beneficial effect of adopting the above technical solution is: a good sealing effect is obtained by appropriately impacting and deforming the two ends of the pipe fitting. The deformation part of the pipe fitting is small and does not affect the main use function of the pipe fitting. The fit between the impact head and the pipe fitting is strengthened during the impact deformation process; after the impact is completed, the stress of the material also allows a certain extrusion force between the two, further improving the sealing degree of the two; at the same time, due to the special outer wall shape of the impact head, the envisioned sealing fitting surface and fitting area can be manufactured, further improving the sealing of the two. The guide head mainly plays the role of guiding the impact head into one end of the pipe fitting to ensure the longitudinal overlap of the pipe fitting and the impact head. The root thickness of the guide head is slightly larger than the inner wall of the pipe fitting. The initial deformation of the pipe fitting is carried out by using its own inclined wedge principle, and the impact deformation can be applied to the pipe fitting with a small extrusion force. The step rod mainly acts on the junction between the axial end of the pipe fitting and the inner wall of the pipe fitting. After deformation, a negative angle will be formed here, and two sealing surfaces will be added, that is, two mutually perpendicular sealing surfaces will be added. This not only extends the gap path from the inner cavity of the pipe to the outside, but also further bends the gap path, further strengthening the sealing degree of the two. The shape of the guide head and the step rod will not affect the subsequent separation of the impact head and the pipe.

[0047] In some other embodiments of the present invention, the second side vertical surface 21 is further provided with a third side vertical surface 22 in a direction away from the pipe fitting 27, the third side vertical surface 22 is parallel to the longitudinal direction of the impact head 5, and a second step surface 24 is perpendicularly intersected at the junction of the second side vertical surface 21 and the third side vertical surface 22, and the second step surface 24 is in contact with the axial end of the pipe fitting 27.

[0048] The beneficial effect of adopting the above technical solution is that the second step surface can also play a certain sealing effect, and at the same time the second step surface also plays a stopping effect to control the penetration distance of the impact head.

[0049] In other embodiments of the present invention, the impact head 5 has a flat end surface on the side facing the centroid of the tube 27, and a convex curved fillet 18 is provided at the junction of the flat end surface and the oblique conical surface 19, and the oblique conical surface 19 is tangently connected to the first side surface 20 through an outer fillet 25.

[0050] The beneficial effects of adopting the above technical solution are: the rounded corners of the convex curved surface further facilitate the guide head to enter the inner cavity of the pipe. The rounded transition between the oblique cone surface and the first side elevation surface can reduce the resistance during the initial impact deformation.

[0051] In some other embodiments of the present invention, the cross-sectional contour shapes of the inclined cone surface 19, the first side elevation 20, and the second side elevation 21 are the same; the cross-sectional contour of the first side elevation 20 is the cross-sectional contour of the inner wall of the tube 27, which is offset 0.1 mm laterally outward along the impact head 5; the cross-sectional contour of the third side elevation 22 is the cross-sectional contour of the outer wall of the tube 27, which is offset 0.2 mm laterally inward along the impact head 5; and the offset between the cross-sectional contour of the second side elevation 21 and the cross-sectional contour of the first side elevation 20 along the transverse direction of the impact head 5 is half of the wall thickness value of the tube 27.

[0052] The beneficial effects of adopting the above technical solution are: the selection of numerical values ​​meets the needs of actual production, the resistance of the entire impact deformation is controlled within an acceptable range, the deformation size of the pipe fittings is also controlled within the range accepted by science and technology, and the pipe fittings will not be torn by impact.

[0053] In some other embodiments of the present invention, in the longitudinal section profile of the impact head 5, the angle between the straight line where the oblique cone surface 19 is located and the straight line where the first side elevation surface 20 is located is 170°.

[0054] The beneficial effect of adopting the above technical solution is that the obtuse angle is large enough to reduce the resistance during the initial impact deformation, and the resistance does not increase suddenly.

[0055] In some other embodiments of the present invention, the longitudinal length of the second side elevation 21 is smaller than the longitudinal length of the first side elevation 20 , and the longitudinal length of the first side elevation 20 is smaller than the longitudinal length of the oblique cone surface 19 .

[0056] The beneficial effect of adopting the above technical solution is that when the first step faces the pipe fitting for stamping, the resistance generated is relatively large, so the length of the second side elevation should not be too large.

[0057] In other embodiments of the present invention, Figure 7As shown, the boundary line between the oblique cone surface 19 and the convex curved surface fillet 18 constitutes a rounded rectangular outline. There are four arcs at the four corners of the rounded rectangular outline, which are divided into two first arcs 28, a second arc 29, and a third arc 30 according to the size of the arc curvature. The curvatures of the first arc 28, the second arc 29, and the third arc 30 gradually decrease, and the two first arcs 28 are two adjacent fillets in the rounded rectangular outline.

[0058] The beneficial effect of adopting the above technical solution is that the rounded rectangular outline is not a conventional axisymmetric figure. The first arc, the second arc, and the third arc of different curvature also represent the degree of concavity and convexity at the four corners of the impact head. The larger the curvature, the sharper it is, and it will first contact the inner wall of the pipe. This design prevents the four corners of the impact head from contacting the pipe at the same time, which can reduce the resistance peak during stamping deformation.

[0059] In some other embodiments of the present invention, the hardness of the impact head 5 is greater than the hardness of the pipe 27 .

[0060] The beneficial effect of adopting the above technical solution is that the hardness of the impact head must be hard enough to deform the pipe fitting while the impact head itself deforms slightly.

[0061] In some other embodiments of the present invention, the impact head 5 has a longitudinal through hole 12 at its center line, and the cross-sectional profile of the through hole 12 is circular.

[0062] The beneficial effect of adopting the above technical solution is that the inner wall contour of the through hole can always be a regular circle, which is convenient for sealing connection with various common pipeline parts, and after the impact head is sealed with the inner wall of the pipe on all sides, it is also capable of injecting or discharging liquid into the pipe.

[0063] The impact head 5 mainly refers to a part of the top of the punch head.

[0064] Fig. 9 compared to Figure 8 The linear cylinder 1 is hidden in FIG.

[0065] Fig.15 , Fig.16 , Fig.17 The displayed state is in the actual working order of the impact head 5. The oblique cone surface 19, the first side elevation surface 20, the first step surface 23, and the second side elevation surface 21 extrude the first sealing surface 31, the second sealing surface 32, the third sealing surface 33, and the fourth sealing surface 34 on the pipe 29 in sequence.

[0066] Fig.10 compared to Fig. 9 , the buffer ring 4 and the impact head 5 are hidden.

[0067] In some other embodiments of the present invention, the impact head is applied to the water sealing mechanism at both ends, including: an impact sealing mechanism, including two punch rod heads arranged at both ends of the pipe fitting 27, the punch rod head including a detachable impact head 5 and an extension rod 3, the impact head 5 contacts the pipe fitting 27, the extension rod 3 is connected to a linear cylinder 1, the punch rod head has a linear motion freedom that coincides with the length direction of the pipe fitting 27 itself, the outer wall of the punch rod head 5 contacts the pipe fitting 27 and squeezes and deforms the inner wall and the axial end of the pipe fitting 27; a liquid circulation mechanism, the pipe fitting 27 is arranged vertically, the punch rod head at the top of the pipe fitting 27 has a liquid inlet for liquid to flow into the inner wall of the pipe fitting 27, and the punch rod head at the bottom of the pipe fitting 27 has a liquid outlet for liquid to flow out; the liquid inlet is connected to a booster pump.

[0068] The beneficial effects of adopting the above technical solution are: the impact sealing mechanism uses two punch heads to seal the two ends of the pipe fitting, the linear cylinder provides the sealing and disengagement force, and the punch head squeezes and deforms the pipe fitting appropriately, so that the contact between the impact head and the pipe fitting will be more fitted and the sealing is good. Since the impact head has to bear the impact deformation of the pipe fitting, the impact head itself may also be damaged, so the impact head is replaceable. The pipe fittings sealed at both ends are punched into high-pressure liquid, and the high-pressure liquid causes the pipe fittings to expand outward, thereby achieving the envisioned appearance effect. The pipe fittings, that is, the mold outside the pipe fittings, are arranged vertically, so that the entire waterway is also vertical. When the work is completed, the liquid outlet is opened, and the liquid can be discharged from the pipe fitting by gravity. The liquid is not easy to remain in the pipe fitting after expansion and deformation.

[0069] In other embodiments of the present invention, along the direction away from the pipe fitting 27, the punch head is composed of an impact head 5, a buffer ring 4, and an extension rod 3 in sequence. The extension rod 3 includes an integral covering section 15 and an exposed section 16. The cross-sectional area of ​​the exposed section 16 is larger than the cross-sectional area of ​​the covering section 15. The buffer ring 4 has a through cavity 11 for the covering section 15 to pass through. The inner wall of the through cavity 11 is in contact with the outer wall of the covering section 15. The hardness of the extension rod 3 is greater than the hardness of the pipe fitting 27.

[0070] The beneficial effects of adopting the above technical solution are: the buffer ring provides a certain elastic buffer force, which can increase the service life of the punch head, the cover section provides a special assembly position for the buffer ring, and also provides a vertical wire for the buffer ring, so that the buffer ring can have a sufficient vertical size, thereby having a sufficient buffering effect. The hardness of the impact head and the extension rod is relatively hard to ensure that their own deformation is small.

[0071] In some other embodiments of the present invention, the impact head 5 has a circle of protrusions 17 at one end facing the extension rod 3, the top of the protrusion 17 contacts the buffer ring 4, the protrusion 17 forms a concave pit, and the bottom of the concave pit contacts the top of the covering section 15.

[0072] The beneficial effect of adopting the above technical solution is that the concave pit provides a certain limit for the top of the extension rod, ensuring that the impact head and the extension rod always overlap longitudinally and are not prone to skewing and deformation under severe force conditions.

[0073] In some other embodiments of the present invention, an annular step surface 14 is vertically intersected between the covering section 15 and the exposed section 16, the area of ​​the annular step surface 14 is equal to the top area of ​​the convex edge 17, the outer wall contour of the buffer ring 4 is the same in shape and size as the outer wall contour of the exposed section 16, and the buffer ring 4 is made of rubber.

[0074] The beneficial effect of adopting the above technical solution is that the convex edge and the annular step surface provide contact for the two ends of the buffer ring respectively. The outer wall of the buffer ring is flush with the outer wall of the exposed section. When the entire punch head is partially deformed or skewed, the outer wall of the buffer ring and the outer wall of the exposed section are easily uneven, which is convenient for personnel to detect and replace.

[0075] In some other embodiments of the present invention, the impact head 5 is provided with a stepped hole 10 , the extension rod 3 is provided with a blind hole 13 , and a bolt passes through each stepped hole 10 and each blind hole 13 , and the bolt passes through the through cavity 11 of the buffer ring 4 .

[0076] The beneficial effect of adopting the above technical solution is that the step hole can prevent the large head of the bolt from being exposed, and the large head of the bolt will not interfere with the inner wall of the pipe. The bolt strengthens the connection strength between the impact head and the extension rod.

[0077] In some other embodiments of the present invention, the extension rod 3 has a through channel 8 connected to the through hole 12 inside, the connected through hole 12 and the through channel 8 constitute a liquid inlet or outlet, and the step holes 10 are symmetrically arranged along the through hole 12.

[0078] The beneficial effects of adopting the above technical solution are: the through hole and the through flow channel provide channels for liquid to flow in and out. The outer wall of the impact head and the extension rod can be designed to adapt to the contour of the pipe fitting, and the impact head and the extension rod themselves have a certain thickness, so that the internal liquid inlet and outlet channels can withstand greater pressure. The inner wall contour of the liquid inlet and outlet channels can always be a conventional circle, which is convenient for sealing connection with various common pipe fittings.

[0079] In some other embodiments of the present invention, the center line of the through flow channel 8 is in an L-shaped line, the root of the extension rod 3 constitutes a base 2, the base 2 has a flat surface 6, one end of the through flow channel 8 constitutes a first water outlet 7 located on the flat surface 8, and the end of the through hole 12 away from the through flow channel 8 constitutes a second water outlet 9.

[0080] The beneficial effects of adopting the above technical solution are: the through-flow channel realizes a right-angle turn, which is convenient for docking with external components without interfering with the mold. Several fixing holes are arranged on the flat surface, which has sufficient contact area and is convenient for sealing and assembling with external components. The structures of the two punch rods can be the same, and the first water outlet and the second water outlet are not limited to water inlet or water outlet, which depends on the position of the punch rod. Punch rods with uniform specifications improve the versatility of components.

[0081] In some other embodiments of the present invention, the linear cylinder 1 is provided with a piston 26, and the cross-sectional areas of the extension rod 3 covering section 15, the extension rod 3 base 2, and the piston 26 gradually increase.

[0082] The beneficial effect of adopting the above technical solution is that the linear cylinder can provide sufficient force, and at the same time, after the punch rod and the linear cylinder are combined, the overall structural strength becomes stronger towards the root.

[0083] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An impact head for a mold water sealing mechanism, characterized in that: include: The guide head and the impact head are composed of an integrated guide head and a step rod. The impact head contacts the pipe fitting and squeezes and deforms the inner wall and the shaft end of the pipe fitting. The longitudinal directions of the impact head and the pipe fitting coincide with each other. The side surface of the guide head is an oblique cone surface. The cross-sectional profile size of the oblique cone surface gradually decreases in the direction close to the centroid of the pipe fitting. The cross-sectional areas of the top and the root of the guide head are respectively smaller and larger than the cross-sectional area of ​​the inner wall of the pipe fitting. The step rod is arranged on the side of the guide head away from the pipe fitting, and the side surface of the step rod is a first side elevation and a second side elevation in the direction away from the pipe fitting; a first step surface is perpendicularly intersected at the junction of the first side elevation and the second side elevation, and the first step surface is perpendicular to the longitudinal direction of the impact head; The cross-sectional area of ​​the first side elevation is smaller than the cross-sectional area of ​​the second side elevation, the cross-sectional area of ​​the first side elevation is larger than the cross-sectional area of ​​the inner wall of the pipe fitting, and the cross-sectional area of ​​the second side elevation is smaller than the cross-sectional area of ​​the outer wall of the pipe fitting; The second side face is also provided with a third side face in a direction away from the pipe, the third side face is parallel to the longitudinal direction of the impact head, a second step face is perpendicularly intersected at the junction of the second side face and the third side face, and the second step face is in contact with the axial end of the pipe; The impact head has a flat end surface on a side facing the centroid of the pipe, a convex curved fillet is provided at the junction of the flat end surface and the oblique cone surface, and the oblique cone surface is tangently connected to the first side elevation surface through an outer fillet; In the longitudinal section profile of the impact head, the angle between the straight line where the oblique cone surface is located and the straight line where the first side elevation surface is located is 170°; The boundary line between the oblique cone surface and the rounded corners of the convex curved surface constitutes a rounded rectangular outline. There are four arcs at the four corners of the rounded rectangular outline, which are divided into two first arcs, one second arc, and one third arc according to the curvature of the arcs. The curvatures of the first arc, the second arc, and the third arc gradually decrease, and the two first arcs are two adjacent rounded corners in the rounded rectangular outline.

2. The impact head for the mold water sealing mechanism according to claim 1, characterized in that: The cross-sectional profile shapes of the oblique cone surface, the first side elevation surface and the second side elevation surface are the same; the cross-sectional profile of the first side elevation surface is the cross-sectional profile of the inner wall of the pipe that is offset 0.1 mm laterally outward along the impact head; the cross-sectional profile of the third side elevation surface is the cross-sectional profile of the outer wall of the pipe that is offset 0.2 mm laterally inward along the impact head; and the offset between the cross-sectional profile of the second side elevation surface and the cross-sectional profile of the first side elevation surface along the transverse direction of the impact head is half of the wall thickness value of the pipe.

3. The impact head for the mold water sealing mechanism according to claim 1, characterized in that: The longitudinal length of the second side elevation is smaller than the longitudinal length of the first side elevation, and the longitudinal length of the first side elevation is smaller than the longitudinal length of the oblique cone surface.

4. The impact head for the mold water sealing mechanism according to claim 1, characterized in that: The hardness of the impact head is greater than the hardness of the pipe.

5. The impact head for the mold water sealing mechanism according to claim 1, characterized in that: The impact head itself has a longitudinal through hole at its center line, and the cross-sectional profile of the through hole is circular.

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