Rearview mirror sealing element forming mold and sealing element of frameless rearview mirror

Abstract

The invention discloses a rearview mirror sealing element forming mold and a sealing element of a frameless rearview mirror, relates to the field of automobile accessory injection molding molds, and aims to solve the problem that the sealing element is not easy to discharge smoothly due to a dense reinforcing structure, the rearview mirror sealing element forming mold comprises a movable mold body and a fixed mold body which can be opened and closed linearly, and the end face of the movable mold body is concavely provided with a mold groove of an annular structure; the fixed mold body is provided with a mold core of an annular structure, a plurality of sheet grooves are annularly formed around the mold core, the sheet grooves penetrate through the inner side, the outer side and the end face of the mold core, the mold core is divided into a plurality of core blocks, and a rod barrel is fixed to the end face of each core block. In the demolding process, the mold sleeve and the mold plug body outwards abut against the sealing piece bound to the mold core through the elastic force effect, so that the rib plate of the sealing piece can be smoothly and axially separated from the sheet groove, and it is guaranteed that the discharging work is smoothly completed.

Description

Technical Field

[0001] The invention relates to the field of injection molding molds for automobile parts, in particular to a molding mold for a rearview mirror seal and a seal for a frameless rearview mirror. Background Art

[0002] Because the lens of a frameless rearview mirror cannot move independently, the entire rearview mirror needs to be driven to adjust the angle. A spherical movable connection is required between the rearview mirror and the base. In order to avoid air leakage and water seepage at the connection, a spherical seal is provided at the connection between the rearview mirror and the base to achieve a movable sealed connection between the rearview mirror and the base.

[0003] The seals are injection molded by molds. Traditional injection molds achieve molding and discharge by closing and opening two mold bodies. The spherical seals have dense reinforcement structures. During the discharge process, the reinforcement structure and the seal body have high interlaced adhesion strength with the mold, making smooth discharge a difficult point in the injection molding process. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art problems, the purpose of the present invention is to provide a rearview mirror seal molding mold and a seal for a frameless rearview mirror, which are used to solve the problem that the seal is not easy to discharge smoothly due to its dense reinforcement structure, and also solve the problem of difficulty in cooling during the molding process of the densely structured parts of the seal.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows: A molding die for producing rearview mirror seals comprises a movable mold body and a fixed mold body which can be opened and closed in a straight line, the end face of the movable mold body being recessed and provided with a mold groove of an annular structure, the fixed mold body having a mold core of an annular structure, a plurality of sheet grooves being arranged in an annular shape around the mold core, the sheet grooves penetrating the inner and outer sides and the end face of the mold core so that the mold core is divided into a plurality of core blocks, the end face of each core block being fixed with a rod barrel, when the movable mold body and the fixed mold body are closed, the mold core is inserted into the mold groove, the outer side of the mold core and the outer side of the mold groove are an outer spherical shell molding space, the inner side of the mold core and the inner side of the mold groove are an inner liner shell molding space, the end face of the mold core and the end face of the mold groove are an annular surface molding space, the sheet grooves are rib plate molding spaces, and the periphery of the rod barrel is injection molded to form a through hole.

[0006] Preferably, the fixed mold body includes a mold base, the mold core is located at the end of the mold base, and the outer side and inner side of the mold base are respectively slidably adapted with a fixed mold sleeve and mold plug body, so that the mold sleeve and mold plug body can slide axially along the mold base, and a spring is connected between the mold plug body and the mold base, so that the mold sleeve and mold plug body have a tendency to slide toward the mold core.

[0007] Preferably, a push rod is slidably inserted into the wall of the mold sleeve, and the end of the push rod can slide out of the end surface of the mold sleeve. A gear is rotatably arranged on the inner side of the mold sleeve, a second rack is arranged on the surface of the push rod, and a first rack is arranged on the outer wall of the mold base. The gears are synchronously meshed and connected with the first rack and the second rack.

[0008] Preferably, a plurality of injection channels are arranged inside the mold base, and the injection channels extend to the inner side of each of the core blocks one by one, so that the injection channels are connected with the molding space of the liner shell.

[0009] Preferably, cooling channels are provided inside the movable mold body, both inside and outside the mold groove, and the inlet and outlet ends of the cooling channels pass through the surface of the movable mold body.

[0010] Preferably, a liquid cavity is provided inside each of the core blocks, and the liquid cavities in every two adjacent core blocks are connected through a U-shaped channel. The rod barrel penetrates each liquid cavity one by one, and guide holes penetrating the end surface of the mold groove are arranged inside the movable mold body. The guide holes are aligned with the rod barrel one by one, and adjacent guide holes are alternately connected to the inlet and outlet ends of the cooling channel.

[0011] Preferably, the inner end of the guide hole passes through the cooling channel through a telescopic groove, the connecting part between the guide hole and the telescopic groove is a first tapered opening with a large opening facing outward, a tapered plug is elastically installed in the telescopic groove through a spring, and the tapered plug is used to block the first tapered opening, and the end of the rod barrel is a second tapered opening with a small opening facing outward, a valve ball is elastically installed inside the rod barrel through a spring, and the valve ball is used to block the second tapered opening.

[0012] Preferably, a guide frame is provided between the movable mold body and the fixed mold body, the fixed mold body and the guide frame are fixed, and the movable mold body and the guide frame slide, so that the movable mold body can move linearly to close or separate from the fixed mold body, and a cylinder for pushing the movable mold body to move is provided at one end of the guide frame, the end face of the fixed mold body has an axial column, and the end face of the movable mold body has an axial hole for aligning the axial column.

[0013] A seal for a frameless rearview mirror which is injection molded using a molding mold for the rearview mirror seal, comprises an inner lining shell and an outer spherical shell which are coaxially distributed inside and outside, wherein the small diameter end of the outer spherical shell is connected to one end of the inner lining shell via an annular surface, a plurality of ribs are annularly distributed between the outer spherical shell and the inner lining shell, the ribs are fixedly connected to the inner lining shell, the outer spherical shell and the annular surface, a plurality of through holes are provided around the annular surface, and the gaps between the through holes and the ribs are aligned.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention forms an injection molding chamber for the seal through a mold core and a mold groove. During the demolding process, the mold sleeve and the mold plug body are pushed outward against the seal bound to the mold core by elastic force, so that the rib plate of the seal can be smoothly axially disengaged from the sheet groove, thereby ensuring smooth completion of the discharge work.

[0015] 2. In the process of discharging, the present invention meshes the gear with the first rack to drive the second rack to drive the push rod to protrude from the end surface of the die sleeve, so that the push rod can assist the axial constant pressure seal and expand the discharging range of the seal.

[0016] 3. The present invention opens a liquid cavity in each core block, and each group of two liquid cavities constitutes a circulation channel. During the injection molding process, the rod barrel is inserted into the guide hole to penetrate the inlet and outlet of the cooling channel, so that the coolant can be circulated and conducted in the liquid cavity, which has a cooling effect on the inner side of the outer spherical shell, the inner side of the liner shell, and the inner side of the annular surface, ensuring that the seal is quickly cooled and molded, and avoiding deformation of the inner side of the seal caused by temperature differences.

[0017] 4. The present invention elastically sets a valve ball at the port of the rod barrel, and elastically sets a tapered plug at the connecting portion of the guide hole and the telescopic groove. When the rod barrel is inserted into the guide hole, the tapered plug and the valve ball automatically squeeze to open the channel. When the rod barrel is withdrawn from the guide hole, the tapered plug and the valve ball automatically close the channel to avoid leakage of coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the sealing structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the molding die structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the fixed mold structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the movable mold of the present invention.

[0022] Figure 5 It is a schematic diagram of the closed structure of the fixed mold body and the movable mold body of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the cooling channel through the rod barrel of the present invention.

[0024] Figure 7 It is a schematic diagram of the liquid cavity communication structure of the present invention.

[0025] Figure numerals: 11, outer spherical shell; 12, inner lining shell; 13, annular surface; 14, through hole; 15, rib; 2, movable mold body; 21, mold groove; 22, guide hole; 23, cooling channel; 3, mold base; 31, mold core; 32, sheet groove; 33, injection channel; 34, liquid cavity; 35, U-shaped channel; 4, mold sleeve; 41, mold plug body; 5, rod barrel; 51, telescopic groove; 52, tapered plug; 53, valve ball; 6, axial column; 61, axial hole; 7, push rod; 71, gear; 72, first rack; 73, second rack. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] like Figure 1 As shown, the seal is composed of an outer spherical shell 11, an inner liner shell 12, an annular surface 13, and ribs 15. The outer spherical shell 11 is a spherical shape with a large diameter at one end and a small diameter at the other end. The inner liner shell 12 is a circular tube with a uniform diameter. The inner liner shell 12 is coaxially arranged on the inner side of the outer spherical shell 11. The small diameter end of the outer spherical shell 11 and the end of the inner liner shell 12 are connected as a whole through the annular surface 13. A plurality of ribs 15 are annularly distributed between the outer spherical shell 11 and the inner liner shell 12. The ribs 15 extend radially and are fixedly connected to the inner liner shell 12, the outer spherical shell 11, and the annular surface 13. A plurality of through holes 14 are evenly opened around the annular surface 13, and the through holes 14 are aligned with the gaps between the ribs 15. A seal is used to connect the frameless rearview mirror and the base. The inner lining shell 12 is sleeved on the shaft of the base. The annular surface 13 contacts the driving component inside the rearview mirror, and a screw is used to penetrate the through hole 14 to connect the seal and the driving component of the rearview mirror. A rubber ring is arranged on the inner side of the interface of the rearview mirror. The rubber ring contacts the surface of the outer spherical shell 11. When adjusting the angle of the rearview mirror, the rubber ring always keeps in contact with the outer spherical shell 11, and the connection part of the rearview mirror is movably sealed to avoid air leakage and water leakage. The setting of the rib 15 increases the anti-deformation connection strength between the outer spherical shell 11 and the inner lining shell 12.

[0028] The above-mentioned seal is injection molded by using the following molding mold; like Figure 2 As shown, the injection mold mainly includes a movable mold body 2, a fixed mold body, an opening and closing driving component, an injection system, and a cooling system; like Figure 4 As shown, the end surface of the movable mold body 2 is annularly recessed inward to form a mold groove 21, the outer edge surface of the mold groove 21 is a spherical surface, and the inner edge surface of the mold groove 21 is a toroidal surface; like Figure 3As shown, the fixed mold body has a mold base 3, and the mold base 3 is a barrel-shaped mold base 3 with a single end sealed. The open end surface of the mold base 3 is integrally provided with an annular mold core 31. The outer side surface of the mold core 31 is spherical, and the inner side surface is a toroidal surface. A plurality of sheet grooves 32 are annularly arranged around the mold core 31, and the sheet grooves 32 penetrate the inner, outer and end surfaces of the mold core 31, so that the mold core 31 is divided into a plurality of core blocks. A rod barrel 5 is fixed to the end surface of each core block, and a mold plug body 41 is slidingly arranged on the inner side of the mold base 3, and a mold sleeve 4 is slidingly arranged on the outer side of the mold base 3. An axially extending limiting slideway is provided on the surface of the mold base 3, and a limiting slide body is arranged in the limiting slideway. The mold sleeve 4 and the mold plug body 41 are fixed to each other through the limiting slide body, so that the mold sleeve 4 and the mold plug body 41 can synchronously slide along the axial direction of the mold base 3. A spring is connected between the mold plug body 41 and the mold base 3, and the elastic force causes the mold sleeve 4 and the mold plug body 41 to have a tendency to move toward the mold core 31. like Figure 5 As shown, the injection system is arranged in the mold base 3, and an injection port is arranged at the center of the end surface of the mold base 3 away from the movable mold body 2, and the injection port is connected to a plurality of injection channels 33, and the injection channels 33 extend along the side wall of the mold base 3, and the injection channels 33 extend one by one to the inner side of each core block and pass through the inner surface of the mold core 31; like Figure 5 As shown, the cooling system is arranged in the movable mold body 2, and cooling channels 23 are arranged inside and outside the mold groove 21 inside the movable mold body 2. The cooling channels 23 are multiple annular channels or spiral channels. The inlet and outlet ends of the cooling channels 23 pass through the surface of the movable mold body 2, so that the coolant can be circulated and conducted in one direction. like Figure 2 As shown, the opening and closing driving component includes a guide frame, a mold base 3 of the fixed mold body is fixed at one end of the guide frame, the movable mold body 2 slides with the guide frame, and a cylinder for pushing the movable mold body 2 to move is provided at one end of the guide frame; The seal injection molding process is as follows: A screw injection molding machine is connected to the end face of the mold base 3, and the cylinder is turned on to extend so that the movable mold body 2 moves and fits with the fixed mold body. The mold core 31 is inserted into the mold groove 21, and the end face of the mold sleeve 4 fits the outer ring plane of the end of the movable mold body 2. The exhaust hole is set at the outer ring plane of the end of the movable mold body 2. The end face of the mold plug body 41 fits the inner side plane of the end of the movable mold body 2, and an injection cavity is formed between the mold core 31 and the mold groove 21. The injection molding machine squeezes the material into the injection port and then introduces it into the injection cavity through each injection channel 33. The injection material first enters between the inner side of the mold core 31 and the inner side of the mold groove 21 to form the inner liner shell 12, and the rib plate 15 is formed in each sheet groove 32. Then, the annular surface 13 is formed between the end face of the mold core 31 and the end face of the mold groove 21, and the through hole 14 is formed on the periphery of the rod barrel 5. Then, the outer spherical shell 11 is formed between the outer side of the mold core 31 and the outer side of the mold groove 21, and the gas in the injection cavity is gradually discharged. Cooling liquid is circulated into the cooling channel 23 from the inlet and outlet ends of the cooling channel 23 to cool the injection material in the injection molding chamber so that it is quickly molded into a seal. Then the cylinder is contracted to move the movable mold body 2 and separate it from the fixed mold body. Due to the dense adhesion of the sheet grooves 32 to the ribs 15 and the adhesion of the rod barrel 5 to the through holes 14, the seal formed during the opening of the movable mold body 2 remains fixed to the fixed mold body. Since the mold sleeve 4 and the mold plug body 41 lose the extrusion restraint of the movable mold body 2, the mold sleeve 4 and the mold plug body 41 slide axially under the action of elastic force, and the mold sleeve 4 and the mold plug body 41 axially resist the seal, so that the ribs 15 are axially withdrawn from the sheet grooves 32, and the rod barrel 5 slides axially and separates from the through holes 14, so that the seal is automatically demolded and falls off.

[0029] The injection molding material first enters between the inner side of the mold core 31 and the inner side of the mold groove 21 to form the inner lining shell 12, which cannot achieve smooth exhaust of the injection molding material from the inside to the outside, and makes the surface of the molded outer spherical shell 11 smooth and complete, ensuring that the seal has a good sealing effect.

[0030] like Figure 5 As shown, two push rods 7 are symmetrically slidably inserted in the two side walls of the mold sleeve 4. The push rods 7 are L-shaped, and the ends of the push rods 7 can slide and protrude from the end surface of the mold sleeve 4. A gear 71 is rotatably installed on the inner side of the mold sleeve 4. A second rack 73 is provided on the surface of the push rods 7, and a first rack 72 is provided on the outer wall of the mold base 3. The gear 71 is synchronously meshed and connected with the first rack 72 and the second rack 73. During injection molding, the end of the push rod 7 maintains a flat surface with the end surface of the mold sleeve 4. During the demolding process of the molded part, the mold sleeve 4 and the mold plug body 41 slide elastically to push out the molded part. During this process, due to the relative sliding of the mold sleeve 4 and the mold base 3, the gear 71 rotates along the first rack 72. Through the meshing transmission of the gear 71 and the second rack 73, the push rod 7 extends out of the end surface of the mold sleeve 4 to assist in pushing out the molded part, thereby expanding the pushing distance and ensuring that the molded part can be smoothly removed.

[0031] The inner side of the ring surface 13 is connected to the outer spherical shell 11, the inner liner shell 12, and the rib plate 15, and the structure density is relatively high. It is difficult to reduce the heat during the injection molding process, and it is easy to cause uneven cooling, resulting in deformation of the inner structure of the seal. The following is a design for targeted cooling of the inner side of the ring surface 13: like Figure 5 , Figure 6 , Figure 7As shown, a liquid cavity 34 is provided inside each core block, and the liquid cavities 34 in every two adjacent core blocks are connected through a U-shaped channel 35, and the rod barrel 5 passes through each liquid cavity 34 one by one, and a plurality of guide holes 22 aligned with the rod barrel 5 are provided on the end surface of the mold groove 21, and the inner ends of adjacent guide holes 22 are alternately connected to the inlet and outlet ends of the cooling channel 23 through the telescopic groove 51, and the connecting part between the guide hole 22 and the telescopic groove 51 is a first tapered opening with a large opening facing outward, and a tapered plug 52 is installed in the telescopic groove 51 by spring elasticity, and the tapered plug 52 is used to block the first tapered opening, and the end of the rod barrel 5 is a second tapered opening with a small opening facing outward, and a valve ball 53 is installed inside the rod barrel 5 by spring elasticity, and the valve ball 53 is used to block the second tapered opening; When the movable mold body 2 and the fixed mold body are closed for injection molding, the rod barrel 5 is inserted into the guide hole 22, and the valve ball 53 and the tapered plug 52 are pressed against each other to open the first tapered opening and the second tapered opening, and the coolant in the cooling channel 23 can enter one of each group of liquid cavities 34 through the rod barrel 5, and then be introduced into another liquid cavity 34 through the U-shaped channel 35, and then be guided back to the cooling channel 23 through the rod barrel 5, so as to realize automatic circulation and conduction of the coolant in the liquid cavity 34. The coolant in the liquid cavity 34 has a cooling effect on the inner side of the outer spherical shell 11, the inner side of the liner shell 12, and the inner side of the annular surface 13, so as to ensure that the seal is quickly cooled and formed, and to avoid deformation of the inner side of the seal caused by the difference in cooling. When the movable mold body 2 is separated from the fixed mold body and demoulded, the rod tube 5 is pulled out from the guide hole 22, and the elastic force causes the conical plug 52 to block the first conical opening and the valve ball 53 to block the second conical opening to avoid leakage.

[0032] like Figure 5 As shown, the end face of the fixed mold body has an axial column 6, and the end face of the movable mold body 2 has an axial hole 61 for aligning the axial column 6. The axial column 6 is inserted into the axial hole 61, so that the fixed mold body and the movable mold body 2 can be accurately axially aligned and fitted.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molding die for producing a rearview mirror seal, comprising a movable die body (2) and a fixed die body that can be opened and closed linearly, characterized in that: The end surface of the movable mold body (2) is recessed and provided with a mold groove (21) of an annular structure. The fixed mold body has a mold core (31) of an annular structure. A plurality of sheet grooves (32) are arranged in an annular manner around the mold core (31). The sheet grooves (32) penetrate the inner and outer sides and the end surface of the mold core (31), so that the mold core (31) is divided into a plurality of core blocks. The end surface of each core block is fixed with a rod barrel (5). When the movable mold body (2) and the fixed mold body are closed, the mold core (31) is inserted into the mold groove (21). The outer side of the mold core (31) and the outer side of the mold groove (21) form a molding space for the outer spherical shell (11). The inner side of the mold core (31) and the inner side of the mold groove (21) form a molding space for the inner liner shell (12). The end surface of the mold core (31) and the end surface of the mold groove (21) form a molding space for the annular surface (13). The sheet grooves (32) form a molding space for the rib plate (15). The outer periphery of the rod barrel (5) is injection molded to form a through hole (14).

2. The molding die for the rearview mirror seal according to claim 1, characterized in that: The fixed mold body comprises a mold base (3), the mold core (31) is located at the end of the mold base (3), and the outer side and the inner side of the mold base (3) are respectively slidably adapted with a mold sleeve (4) and a mold plug body (41) fixed thereto, so that the mold sleeve (4) and the mold plug body (41) can slide axially along the mold base (3), and a spring is connected between the mold plug body (41) and the mold base (3), so that the mold sleeve (4) and the mold plug body (41) have a tendency to slide towards the mold core (31).

3. The molding die for the rearview mirror seal according to claim 2, characterized in that: A push rod (7) is slidably inserted into the wall of the mold sleeve (4), the end of the push rod (7) can slidably protrude from the end surface of the mold sleeve (4), a gear (71) is rotatably arranged on the inner side of the mold sleeve (4), a second rack (73) is arranged on the surface of the push rod (7), a first rack (72) is arranged on the outer wall of the mold base (3), and the gear (71) is synchronously meshed with the first rack (72) and the second rack (73).

4. The molding die for the rearview mirror seal according to claim 2, characterized in that: A plurality of injection channels (33) are arranged inside the mold base (3), and the injection channels (33) extend one by one to the inner side of each of the core blocks, so that the injection channels (33) are connected to the molding space of the liner shell (12).

5. The molding die for the rearview mirror seal according to claim 1, characterized in that: The movable mold body (2) is provided with cooling channels (23) both inside and outside the mold groove (21), and the inlet and outlet ends of the cooling channels (23) penetrate the surface of the movable mold body (2).

6. The molding die for the rearview mirror seal according to claim 5, characterized in that: A liquid cavity (34) is provided inside each of the core blocks, and the liquid cavities (34) in every two adjacent core blocks are connected via a U-shaped channel (35). The rod barrel (5) passes through each of the liquid cavities (34) one by one. A guide hole (22) penetrating the end surface of the mold groove (21) is provided inside the movable mold body (2). The guide holes (22) are aligned with the rod barrel (5) one by one, and adjacent guide holes (22) are alternately connected to the inlet and outlet ends of the cooling channel (23).

7. The molding die for the rearview mirror seal according to claim 6, characterized in that: The inner end of the guide hole (22) passes through the cooling channel (23) via the telescopic groove (51); the connecting portion between the guide hole (22) and the telescopic groove (51) is a first tapered opening with a large opening facing outwards; a tapered plug (52) is elastically mounted in the telescopic groove (51) via a spring; the tapered plug (52) is used to block the first tapered opening; the end of the rod tube (5) is a second tapered opening with a small opening facing outwards; a valve ball (53) is elastically mounted in the rod tube (5) via a spring; the valve ball (53) is used to block the second tapered opening.

8. The molding die for the rearview mirror seal according to claim 1, characterized in that: A guide frame is provided between the movable mold body (2) and the fixed mold body, the fixed mold body and the guide frame are fixed, and the movable mold body (2) and the guide frame slide, so that the movable mold body (2) can move linearly to close or separate from the fixed mold body, and a cylinder for pushing the movable mold body (2) to move is provided at one end of the guide frame, the end surface of the fixed mold body has an axial column (6), and the end surface of the movable mold body (2) has an axial hole (61) aligned with the axial column (6).

9. A seal for a frameless rearview mirror, injection molded by using the molding mold for the rearview mirror seal according to any one of claims 1 to 8, characterized in that: The invention comprises an inner liner shell (12) and an outer spherical shell (11) which are coaxially distributed inside and outside. The small diameter end of the outer spherical shell (11) is connected to one end of the inner liner shell (12) via an annular surface (13). A plurality of ribs (15) are distributed in an annular shape between the outer spherical shell (11) and the inner liner shell (12). The ribs (15) are fixedly connected to the inner liner shell (12), the outer spherical shell (11) and the annular surface (13). A plurality of through holes (14) are provided around the annular surface (13). The gaps between the through holes (14) and the ribs (15) are aligned.

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