Continuous injection mold

Abstract

The present application discloses a continuous injection mold, which includes a mold assembly, a demoulding mechanism, a lifting mechanism and a driving mechanism. The mold assembly includes an upper mold, a lower mold and a support seat; the demoulding mechanism includes an ejector; the lifting mechanism includes a lifting member and a first driving member, and the first driving member drives the lifting member to lift or put down the injection molded part; the driving mechanism includes a transmission assembly and a second driving member, and the second driving member is used to drive the lifting member to drive the partial structure of the injection molded part to move out from between the upper mold and the lower mold. The partial structure of the injection molded part is moved out from between the upper mold and the lower mold by the lifting member and the transmission assembly, and the partial structure of the injection molded part retained between the upper mold and the lower mold is connected with the newly formed injection molded part between the upper mold and the lower mold by a nesting method. The continuous injection mold can produce continuous strip-shaped injection molded parts, and can avoid the fracture of the injection molded parts as much as possible, thereby improving the production efficiency and product quality of the injection molded parts.

Description

Technical Field

[0001] The present application relates to the field of injection molds, and in particular to a continuous injection mold. Background Art

[0002] In the related art, an injection mold is used to shape molten plastic particles into injection molded parts, and long strip-shaped injection molded parts are processed by splicing. When the injection molded parts are processed by splicing, the injection molded parts are divided into multiple sub-injection molded parts, each of which is first injection molded by independent injection molding, and then the multiple sub-injection molded parts are connected in sequence by gluing or hot melting to form a strip-shaped injection molded part. This processing method requires splicing of multiple sub-injection molded parts to process strip-shaped injection molded parts, which reduces the production efficiency of strip-shaped injection molded parts. In addition, the splicing quality of the splicing between two adjacent sub-injection molded parts is difficult to control, resulting in the strip-shaped injection molded parts being easily broken at the splicing, thereby reducing the product quality of the injection molded parts. Summary of the invention

[0003] In order to avoid the need to use glue bonding or heat welding to splice the various parts of the injection molded parts when producing strip-shaped injection molded parts, and to avoid the injection molded parts from breaking as much as possible, the present application provides a continuous injection mold.

[0004] The continuous injection mold provided in this application adopts the following technical solution:

[0005] A continuous injection mold comprises: a mold assembly, wherein the mold assembly comprises an upper mold, a lower mold and a support seat, the support seat and the lower mold are arranged along the length direction of the continuous injection mold, the upper mold and the lower mold are arranged opposite to each other, and the upper mold is suitable for moving close to or away from the lower mold, an injection gap is formed between the upper mold and the lower mold when the upper mold and the lower mold are stopped, the upper mold has a feed port and a feed channel, the feed channel is connected between the feed port and the injection gap, and the support seat is used to support the injection molded part injection molded in the injection gap.

[0006] A demoulding mechanism, wherein the demoulding mechanism includes an ejector, wherein the ejector passes through the lower mold and is used to eject the injection molded part from the lower mold; a lifting mechanism, wherein the lifting mechanism includes a lifting member and a first driving member, wherein the lifting member is connected and cooperated with the first driving member, and when the lifting member is driven by the first driving member, the injection molded part is lifted or lowered.

[0007] The driving mechanism includes a transmission assembly and a second driving member, the transmission assembly is suitable for being transmission-connected between the second driving member and the lifting member, the second driving member is used to drive the lifting member to move between the lower mold and the support seat through the transmission assembly, so that the lifting member drives part of the structure of the injection molded part to move out from between the upper mold and the lower mold.

[0008] By adopting the above technical scheme, by arranging a lifting piece and a transmission assembly in the continuous injection mold, the lifting piece and the transmission assembly move part of the structure of the injection molded part out from between the upper mold and the lower mold, and the part of the structure of the injection molded part retained between the upper mold and the lower mold is connected with the newly formed injection molded part between the upper mold and the lower mold by using a nesting method. Compared with the existing technology, when the continuous injection mold produces injection molded parts, there is no need to use glue or use hot welding to connect two injection molded parts together, which reduces the splicing process between two adjacent injection molded parts, thereby improving the production efficiency of injection molded parts, and using the nesting method to process injection molded parts can minimize the breakage of injection molded parts, thereby improving the product quality of injection molded parts.

[0009] Preferably, the lifting member includes a lifting member body and a lifting part, the lifting part is arranged on the top wall of the lifting member body, the first driving member is arranged on the bottom wall of the lifting member body, and the first driving member is suitable for connecting and cooperating with the lifting member body; the side wall of the lower mold and the side wall of the support seat both have a receiving groove, and the receiving groove is used to accommodate the lifting part, and when the lifting member is driven by the first driving member, the lifting part extends into the receiving groove, or the lifting part extends out of the receiving groove and stops against the injection molded part.

[0010] By adopting the above technical solution, the first driving member drives the lifting part to move along the height direction of the continuous injection mold by driving the lifting member body, thereby achieving the technical effect of lifting the injection molded part. In addition, the first driving member drives the lifting part to extend out of the receiving groove through the lifting member body, and the injection molded part can be lifted by the lifting part to be separated from the lower mold, thereby reducing the difficulty of moving the injection molded part to the support seat, thereby improving the user experience of the continuous injection mold.

[0011] Preferably, the lifting member body is provided with a first connecting part, the transmission assembly includes a first transmission member, the first transmission member is provided with a second connecting part, the first connecting part and the second connecting part are arranged opposite to each other, and after the lifting member is lifted by the first driving member, the first connecting part and the second connecting part are connected and cooperated, and the second driving member is suitable for driving the first transmission member to drive the lifting member to move from the lower mold toward the support seat.

[0012] By adopting the above technical solution, the second driving member drives the first transmission member to drive the lifting member to move closer to the support seat, so that the injection molded part lifted by the lifting member can be moved above the support seat, thereby achieving the technical effect of moving the injection molded part from the lower mold to the support seat.

[0013] Preferably, the first connecting portion is configured as a first meshing tooth, the first transmission member is configured as a first rack, the first rack is extended along the length direction of the continuous injection mold, the second meshing tooth of the first rack opposite to the first meshing tooth is configured as the second connecting portion, the first meshing tooth is suitable for meshing connection with the second meshing tooth, and the first rack is meshingly connected with the second driving member.

[0014] By adopting the above technical solution, the first rack drives the lifting member to move closer to the support seat, thereby achieving the technical effect of moving the injection molded part from the lower mold to the support seat. In addition, by using the second meshing teeth to simultaneously connect and cooperate with the second driving member and the first connecting part, the functionality of the second meshing teeth can be improved.

[0015] Preferably, the lifting mechanism has a plurality of the lifting members, and the plurality of the lifting members are spaced apart along the width direction of the continuous injection mold; the lifting mechanism is also provided with an opening and closing assembly, and the opening and closing assembly includes a third driving member and a plurality of opening and closing members, and the opening and closing members are connected between the third driving member and the lifting member, and the third driving member is used to drive the opening and closing members to drive the plurality of the lifting members to move closer to or away from each other.

[0016] The lifting member body is provided with a third connecting part, the transmission assembly includes a second transmission member, the second transmission member is provided with a fourth connecting part, the third connecting part and the fourth connecting part are arranged opposite to each other, after the plurality of lifting members are separated from each other by the opening and closing assembly, the third connecting part is connected and cooperated with the fourth connecting part, and the second driving member is suitable for driving the second transmission member to drive the lifting member to move from the support seat toward the lower mold.

[0017] By adopting the above technical solution, the first driving member drives the lifting member to move away from the injection molded part so that the lifting part is separated from the injection molded part, and the third driving member drives the opening and closing member to drive the multiple lifting members to move away from each other, so that the lifting part can be separated from the receiving groove. In addition, the third driving member drives the opening and closing member to drive the multiple lifting members to move closer to each other so that the lifting part enters the receiving groove, so that the lifting member can continue to lift the injection molded part located in the lower mold, thereby achieving the technical effect of continuous operation of the continuous injection mold.

[0018] Preferably, the third connecting portion is configured as a third meshing tooth, the second transmission member is configured as a second rack, the second rack is extended along the length direction of the continuous injection mold, the fourth meshing tooth of the second rack opposite to the third meshing tooth is configured as the fourth connecting portion, the third meshing tooth is suitable for meshing connection with the fourth meshing tooth, and the second rack is meshingly connected with the second driving member.

[0019] By adopting the above technical solution, the second rack is meshedly connected with the second driving member, so that the second rack can drive the lifting member to move closer to the lower mold, thereby achieving the technical effect of resetting the lifting member to the initial position of the lower mold.

[0020] Preferably, the lifting member body is provided with a plurality of the lifting parts, and the plurality of the lifting parts are sequentially spaced apart and arranged along the length direction of the continuous injection mold.

[0021] By adopting the above technical solution, when a single lifting part is damaged, the remaining undamaged lifting parts can lift the injection molded part, so that the continuous injection mold can continue to work normally, thereby improving the user experience of the continuous injection mold. In addition, by using multiple lifting parts to lift the injection molded part, the volume of a single lifting part can be reduced, thereby reducing the manufacturing cost of the lifting parts, and further reducing the manufacturing cost of the continuous injection mold.

[0022] Preferably, the upper end wall of the lower mold is provided with a plurality of injection molding protrusions, and the plurality of injection molding protrusions are arranged in sequence along the length direction of the continuous injection mold, and the lower end wall of the upper mold is provided with a plurality of injection molding recesses, and the plurality of injection molding recesses are arranged in sequence along the length direction of the continuous injection mold, and the plurality of injection molding recesses correspond one-to-one to the plurality of injection molding protrusions, and the injection molding protrusions are suitable for extending into the injection molding recesses, and the injection molding gap is formed between the injection molding protrusions and the injection molding recesses.

[0023] By adopting the above technical solution, the shape of the injection gap matches the designed shape of the injection molded part, so that the injection gap can shape the molten plastic particles into a strip-shaped injection molded part that meets the shape design requirements.

[0024] Preferably, a cross-sectional dimension of at least one of the plurality of injection molding recesses that is away from the support seat is smaller than a cross-sectional dimension of the injection molding recess that is close to the support seat among the plurality of injection molding recesses.

[0025] The upper mold is also provided with a replacement part, which is embedded in the end of the upper mold close to the support seat, and the replacement part has a first replacement part and a second replacement part, the first replacement part and the second replacement part are symmetrically arranged along the central axis of the replacement part, the first replacement part and the second replacement part are both suitable for being arranged opposite to the injection molding protrusion, the first replacement part and the second replacement part both have the injection molding recess, and the cross-sectional size of at least one of the injection molding recesses of the first replacement part is smaller than the cross-sectional size of the injection molding recess of the second replacement part.

[0026] By adopting the above technical solution, during the first processing, the first replacement part is connected and matched with the upper mold, and the front end of the upper mold and the lower mold are closed after the mold is closed, so that the molten plastic particles are not easy to overflow from the front end of the upper mold and the lower mold, and the injection molded parts formed between the upper mold and the lower mold are not easy to produce excessive defects such as edge burrs and holes, so that the continuous injection mold can form good quality injection molded parts during the first processing. In addition, during the process of beer processing, the second replacement part is connected and matched with the upper mold, and the injection molded parts located on the support seat enter between the upper mold and the lower mold through the open mouth formed between the second replacement part and the lower mold, and the plastic parts formed in the injection gap can be connected with the injection molded parts located on the support seat, so that the processing of longer strip-shaped injection molded parts can be realized.

[0027] Preferably, the continuous injection mold also includes: a fifth driving member, the replacement member is connected and cooperated with the fifth driving member, and the fifth driving member is suitable for driving the replacement member to rotate around the central axis of the replacement member so that the first replacement part is arranged opposite to the injection protrusion, or the second replacement part is arranged opposite to the injection protrusion.

[0028] By adopting the above technical solution, when performing the first processing, the fifth driving member drives the replacement part to rotate around the central axis of the replacement part so that the first replacement part is inserted into the avoidance groove of the upper mold. When performing the beer-in-place processing, the fifth driving member drives the replacement part to rotate around the central axis of the replacement part so that the second replacement part is connected and matched with the upper mold. Compared with the operator rotating the replacement part with both hands, such a setting can reduce the working difficulty of the operator, thereby improving the use experience of the continuous injection mold.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By arranging a lifting piece and a transmission assembly in the continuous injection mold, the lifting piece and the transmission assembly move part of the structure of the injection molded part out from between the upper mold and the lower mold, and the part of the structure of the injection molded part retained between the upper mold and the lower mold is connected with the newly formed injection molded part between the upper mold and the lower mold by a nesting method. Compared with the prior art, when the continuous injection mold produces the injection molded part, there is no need to use glue or use a hot-melt method to connect the two injection molded parts together, which reduces the splicing process between two adjacent injection molded parts, thereby improving the production efficiency of the injection molded parts, and the use of the nesting method to process the injection molded parts can avoid the fracture of the injection molded parts as much as possible, thereby improving the product quality of the injection molded parts;

[0031] 2. The second driving member drives the first transmission member to drive the lifting member to move closer to the support seat, so that the injection molded part lifted by the lifting member can be moved above the support seat, thereby achieving the technical effect of moving the injection molded part from the lower mold to the support seat;

[0032] 3. During the initial processing, the fifth driving member drives the replacement member to rotate around the central axis of the replacement member so that the first replacement part is inserted into the avoidance groove of the upper mold. During the beer-in-place processing, the fifth driving member drives the replacement member to rotate around the central axis of the replacement member so that the second replacement part is connected and matched with the upper mold. Compared with the operator rotating the replacement member with both hands, such a setting can reduce the working difficulty of the operator, thereby improving the use experience of the continuous injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a continuous injection mold according to an embodiment of the present application;

[0034] Figure 2 is a cross-sectional view of a continuous injection mold according to an embodiment of the present application;

[0035] Figure 3 is a schematic diagram of a lower mold according to an embodiment of the present application;

[0036] Figure 4 is a schematic diagram of a partial structure of a continuous injection mold according to an embodiment of the present application;

[0037] Figure 5 is a side view of a continuous injection mold according to an embodiment of the present application;

[0038] Figure 6 is a schematic diagram of another part of the structure of the continuous injection mold according to an embodiment of the present application;

[0039] Figure 7 yes Figure 6 A magnified schematic diagram of center A.

[0040] Description of reference numerals:

[0041] 100. Continuous injection mold;

[0042] 10. Mold assembly; 101. upper mold; 1011. injection molding depression; 1012. replacement part; 1013. first replacement part; 1014. second replacement part; 1015. fifth driving member; 1016. avoidance groove; 102. lower mold; 1021. injection molding protrusion; 103. support seat; 104. receiving groove;

[0043] 20. Lifting mechanism; 201. Lifting member; 2011. Lifting member body; 2012. Lifting portion; 2013. First connecting portion; 2014. Third connecting portion; 202. First driving member; 203. Opening and closing assembly; 2031. Third driving member; 2032. Opening and closing member;

[0044] 30. Driving mechanism; 301. Transmission assembly; 3011. First transmission member; 3012. Second connecting portion; 3013. Second transmission member; 3014. Fourth connecting portion. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0046] The embodiment of the present application discloses a continuous injection mold 100, which is used to inject a long strip-shaped injection molded part. The strip-shaped injection molded part can be used to connect two machines that are far apart.

[0047] Reference Figure 1 , Figure 2 , Figure 5 According to the embodiment of the present application, the continuous injection mold 100 includes: a mold assembly 10, a demoulding mechanism, a lifting mechanism 20 and a driving mechanism 30. The mold assembly 10 includes an upper mold 101, a lower mold 102 and a support seat 103. The support seat 103 and the lower mold 102 are arranged along the length direction of the continuous injection mold 100. The length direction of the continuous injection mold 100 can refer to Figure 2 The support seat 103 is arranged in the front-to-back direction, and the end face of the support seat 103 away from the driving mechanism 30 is stopped and matched with the end face of the lower mold 102 close to the driving mechanism 30, so that the injection-molded part can be moved from the lower mold 102 to the support seat 103 after injection molding. The support seat 103 is used to support the injection-molded part after injection molding. The support seat 103 can prevent the injection molded part from bending and breaking as much as possible, so that the injection molded part can continue to be injection molded normally between the upper mold 101 and the lower mold 102.

[0048] The upper mold 101 is disposed opposite to the lower mold 102, and the upper mold 101 is adapted to move closer to or away from the lower mold 102. In some specific embodiments, for example Figure 2 As shown, the upper mold 101 is located directly above the lower mold 102, and the upper mold 101 is suitable for Figure 5 The upper mold 101 moves relative to the lower mold 102 in the up-down direction. When the continuous injection mold 100 is injection molding the injection molded part, the upper mold 101 moves close to the lower mold 102 so that the upper mold 101 and the lower mold 102 stop. When the upper mold 101 and the lower mold 102 stop, an injection gap is formed between the upper mold 101 and the lower mold 102, and the upper mold 101 and the lower mold 102 jointly close the injection gap. The injection gap is used for molding the injection molded part, and the shape of the injection gap matches the shape of the injection molded part. After the injection molded part is molded in the continuous injection mold 100, the upper mold 101 moves away from the lower mold 102, the injection gap is opened, and the demoulding mechanism can eject the injection molded part located in the lower mold 102, and the injection molded part can be moved out from between the upper mold 101 and the lower mold 102, so that the injection gap between the upper mold 101 and the lower mold 102 can continue to mold the injection molded part.

[0049] Furthermore, the length dimension of the end face constituting the injection gap of the upper mold 101 is equal to the length dimension of the end face constituting the injection gap of the lower mold 102, so that the molten plastic particles can be prevented from overflowing from the injection gap as much as possible, and the overflowed molten plastic particles can be prevented from solidifying on the surface of the injection molded part to form a convex defect, so that the shape of the injection molded part after injection molding can meet the design requirements, thereby improving the product quality of the injection molded part.

[0050] In addition, the upper mold 101 has a feed port and a feed channel, the feed channel is connected between the feed port and the injection gap, the feed port is arranged on the end face of the upper mold 101 away from the injection gap, the feed port is connected and matched with the injection molding device, the molten plastic particles in the injection molding device can be injected into the injection gap through the feed port, and the molten plastic particles can be cooled and shaped in the injection gap to form an injection molded part. After the injection molded part in the injection gap is shaped, the injection molded part in the injection gap needs to be moved out of the injection gap, and the moved out injection molded part can be placed on the support seat 103.

[0051] At the same time, the demoulding mechanism includes an ejector, which passes through the lower mold 102 and is used to eject the injection molded part from the lower mold 102. When the continuous injection mold 100 completes injection molding, the upper mold 101 moves away from the lower mold 102, and the ejector in the lower mold 102 moves close to the upper mold 101 to eject the injection molded part located at the end surface of the lower mold 102 that constitutes the injection gap. Further, the ejector can be configured as an ejector pin, and there can be multiple ejectors, and the multiple ejectors are sequentially spaced apart along the length direction of the continuous injection mold 100. When ejecting the injection molded part, the multiple ejectors simultaneously move close to the upper mold 101 to eject the injection molded part evenly, thereby preventing the injection molded part from tilting and colliding with the lower mold 102, and preventing the end surface of the lower mold 102 that constitutes the injection gap from being scratched by the injection molded part.

[0052] The lifting mechanism 20 includes a lifting member 201 and a first driving member 202. The lifting member 201 is connected and matched with the first driving member 202. The first driving member 202 is fixedly connected to the mounting bracket of the injection molding equipment. The lifting member 201 abuts against the lower end wall of the injection molding part. When the lifting member 201 is driven by the first driving member 202, the injection molding part is lifted or lowered. During the ejection process of the injection molding part, the first driving member 202 drives the lifting member 201 to rise to lift the injection molding part. 1 and the ejector synchronously lift the injection-molded part, thereby reducing the difficulty of ejecting the injection-molded part from the lower mold 102. After the injection-molded part is ejected, the ejector moves away from the injection-molded part. At this time, the lifting member 201 supports the injection-molded part. The lifting member 201 can limit the injection-molded part from returning to the surface of the lower mold 102. Then, by moving the lifting member 201, the lifting member 201 can drive the injection-molded part to move so as to remove part of the structure of the injection-molded part from between the upper mold 101 and the lower mold 102.

[0053] The driving mechanism 30 is used to move the lifting member 201 to drive the injection molded part to move, wherein the driving mechanism 30 includes a transmission component 301 and a second driving component, the transmission component 301 is suitable for transmission connection between the second driving component and the lifting member 201, and the second driving component is used to drive the lifting member 201 to move between the lower mold 102 and the support seat 103 through the transmission component 301, so that the lifting member 201 drives part of the structure of the injection molded part to move out from between the upper mold 101 and the lower mold 102, and the lifting member 201 moves the removed part of the structure of the injection molded part to above the support seat 103, so that the removed part of the structure of the injection molded part can be placed on the support seat 103, and the technical effect of moving the injection molded part from the lower mold 102 to the support seat 103 can be achieved.

[0054] Furthermore, another part of the structure of the injection molded part is located between the upper mold 101 and the lower mold 102. When the upper mold 101 and the lower mold 102 are stopped again, the molten plastic particles and the part of the structure of the injection molded part that is retained between the upper mold 101 and the lower mold 102 together form a section of the injection molded part in the injection gap, so that the injection molded part can be continuously molded in the continuous injection mold 100. The continuous injection mold 100 can use the method of nesting beer to injection mold a strip-shaped injection molded part, and the length of the injection molded part can be changed by adjusting the number of injection molding processes of the continuous injection mold 100. In some embodiments, the first driving member 202 can be a cylinder, but the present application is not limited thereto. The first driving member 202 can also be a cylinder, etc.

[0055] Therefore, by arranging the lifting member 201 and the transmission assembly 301 in the continuous injection mold 100, the lifting member 201 and the transmission assembly 301 move part of the structure of the injection molded part out from between the upper mold 101 and the lower mold 102, and the part of the structure of the injection molded part retained between the upper mold 101 and the lower mold 102 is connected with the newly formed injection molded part between the upper mold 101 and the lower mold 102 by using a nesting method. Compared with the prior art, the continuous injection mold 100 does not need to use glue or use hot welding to connect two injection molded parts together when producing injection molded parts, thereby reducing the splicing process between two adjacent injection molded parts, thereby improving the production efficiency of injection molded parts, and using the nesting method to process injection molded parts can minimize the breakage of injection molded parts, thereby improving the product quality of injection molded parts.

[0056] Reference Figure 1 , Figure 2 , Figure 5 In some embodiments of the present application, the lifting member 201 includes a lifting member body 2011 and a lifting portion 2012. The lifting portion 2012 is arranged on the top wall of the lifting member body 2011. The lifting portion 2012 is abutted against the bottom wall of the injection molded part so that the injection molded part can be lifted by the lifting member 201 along the height direction of the continuous injection mold 100. The first driving member 202 is arranged on the bottom wall of the lifting member body 2011. The first driving member 202 is suitable for connecting and cooperating with the lifting member body 2011. The first driving member 202 drives the lifting portion 2012 to move along the height direction of the continuous injection mold 100 by driving the lifting member body 2011, thereby achieving the technical effect of lifting the injection molded part.

[0057] When the continuous injection mold 100 has two lifting parts 201, the left side wall of the lower mold 102, the right side wall of the lower mold 102, the left side wall of the support seat 103 and the right side wall of the support seat 103 all have a receiving groove 104, and the receiving groove 104 is used to accommodate the lifting part 2012. The width dimension of the receiving groove 104 matches the width dimension of the lifting part 2012. The lifting part 2012 can fill the opening of the receiving groove 104 toward the injection gap, thereby avoiding defects such as burrs on the edges of the injection molded parts, and further improving the product quality of the injection molded parts.

[0058] When the lifting member 201 is driven by the first driving member 202, the lifting portion 2012 extends into the receiving groove 104, or the lifting portion 2012 extends out of the receiving groove 104 and stops against the injection molded part. When the continuous injection mold 100 performs injection molding, the first driving member 202 drives the lifting portion 2012 to extend into the receiving groove 104 through the lifting member body 2011, and the lifting portion 2012 can fill the receiving groove 104. When the molten plastic particles are injected into the injection molding gap, the molten plastic particles will not flow out through the receiving groove 104, so that the molten plastic particles can be formed into plastic parts in the injection molding gap.

[0059] After the injection molded part is formed, the first driving member 202 drives the lifting part 2012 to extend out of the receiving groove 104 through the lifting member body 2011, and the injection molded part can be lifted by the lifting part 2012 to separate from the lower mold 102, thereby reducing the difficulty of moving the injection molded part to the support seat 103, thereby improving the user experience of the continuous injection mold 100.

[0060] Furthermore, the lifting portion 2012 is arranged flush with the end surface of the lower mold 102 close to the upper mold 101, thereby avoiding defects such as pits or protrusions on the end surface of the injection molded part that stops at the lower mold 102 during the injection molding process, thereby improving the product quality of the injection molded part.

[0061] Reference Figure 1 , Figure 6 , Figure 7 In some embodiments of the present application, the lifting member body 2011 is provided with a first connecting portion 2013, the transmission assembly 301 includes a first transmission member 3011, and the first transmission member 3011 is provided with a second connecting portion 3012, along the height direction of the continuous injection mold 100 (i.e. Figure 5 In the up-down direction in the drawing, the first connection part 2013 and the second connection part 3012 are arranged opposite to and spaced apart from each other. In the process of the lifting member 201 moving close to the upper mold 101, interference between the first connection part 2013 and the second connection part 3012 can be avoided, resulting in the injection molded part being unable to be lifted by the lifting member 201, thereby ensuring that the continuous injection mold 100 can work normally.

[0062] Furthermore, after the lifting member 201 is lifted by the first driving member 202, the first connecting part 2013 is connected and cooperated with the second connecting part 3012, and the second driving member is suitable for driving the first transmission member 3011 to drive the lifting member 201 to move from the lower mold 102 toward the support seat 103. Specifically, when the lifting member 201 lifts the injection molded part to a preset height, the first connecting part 2013 is connected and cooperated with the second connecting part 3012. At this time, the first transmission member 3011 can drive the lifting member 201 to move when it moves. The second driving member drives the first transmission member 3011 to drive the lifting member 201 to move close to the support seat 103, so that the injection molded part lifted by the lifting member 201 can be moved above the support seat 103, thereby achieving the technical effect of moving the injection molded part from the lower mold 102 to the support seat 103. Furthermore, when the lifting member 201 is lowered by the first driving member 202 , the first connecting portion 2013 is separated from the second connecting portion 3012 , and at this time, the first transmission member 3011 cannot drive the lifting member 201 to move when it moves.

[0063] Reference Figure 1 , Figure 6 , Figure 7 In some embodiments of the present application, the first connecting portion 2013 is configured as a first meshing tooth, the first transmission member 3011 is configured as a first rack, the first rack is extended along the length direction of the continuous injection mold 100, and the first rack can move along the length direction of the continuous injection mold 100 when driven by the second driving member.

[0064] Furthermore, the second meshing teeth of the first rack, which are opposite to the first meshing teeth, are configured as the second connecting portion 3012, the first meshing teeth are adapted to be meshed and connected with the second meshing teeth, and the first rack is meshed and connected with the second driving member, so that the first rack drives the lifting member 201 to move closer to the supporting seat 103, thereby achieving the technical effect of moving the injection molded part from the lower mold 102 to the supporting seat 103. Furthermore, by utilizing the second meshing teeth to be connected and matched with the second driving member and the first connecting portion 2013 at the same time, the functionality of the second meshing teeth can be improved.

[0065] Furthermore, the second driving member includes a power member and a driving gear, the power member is meshedly connected with the driving gear, the driving gear is meshedly connected with the first rack, and the power member can drive the driving gear to rotate to drive the first rack to move along the length direction of the continuous injection mold 100. In some embodiments, the power member can be a driving motor, but the present application is not limited thereto, and the power member can also be a hydraulic motor, etc.

[0066] Reference Figure 1 , Figure 5 , Figure 7 In some embodiments of the present application, the lifting mechanism 20 has a plurality of lifting members 201, and the plurality of lifting members 201 are arranged spaced apart along the width direction of the continuous injection mold 100. Figure 5In the embodiment shown, there may be two lifting members 201, and along the width direction of the continuous injection mold 100, the two lifting members 201 are symmetrically arranged on both sides of the lower mold 102. The width direction of the continuous injection mold 100 may refer to Figure 5 One of the lifting members 201 is arranged on the left side wall of the lower mold 102, and the other lifting member 201 is arranged on the right side wall of the lower mold 102. Such an arrangement enables the injection molded part to be lifted uniformly by the lifting member 201, thereby preventing the injection molded part from tipping over and causing the injection molded part to separate from the lifting member 201, thereby improving the working reliability of the continuous injection mold 100. Furthermore, the lower mold 102 and the support seat 103 are correspondingly provided with a plurality of accommodating grooves 104.

[0067] The lifting mechanism 20 can also be provided with an opening and closing component 203, which can include a third driving member 2031 and multiple opening and closing members 2032. The opening and closing members 2032 are connected between the third driving member 2031 and the lifting member 201. The third driving member 2031 is used to drive the opening and closing member 2032 to drive the multiple lifting members 201 to move closer to or away from each other. After the lifting member 201 places the injection molded part on the support seat 103, the first driving member 202 drives the lifting member 201 to move away from the injection molded part to separate the lifting part 2012 from the injection molded part. The third driving member 2031 drives the opening and closing member 2032 to drive the multiple lifting members 201 to move away from each other, and the lifting part 2012 can be separated from the accommodating groove 104.

[0068] The lifting member body 2011 is provided with a third connection part 2014, the transmission assembly 301 includes a second transmission member 3013, and the second transmission member 3013 is provided with a fourth connection part 3014. Along the width direction of the continuous injection mold 100, the third connection part 2014 and the fourth connection part 3014 are arranged opposite to each other. After the plurality of lifting members 201 are separated from each other by the opening and closing assembly 203 and the lifting member 2012 is separated from the receiving groove 104, the third connection part 2014 is connected and matched with the fourth connection part 3014, and the second driving member is suitable for Driving the second transmission member 3013 to drive the lifting member 201 to move from the support seat 103 toward the lower mold 102 can make the lifting member 201 move to be opposite to the receiving groove 104 of the lower mold 102. The third driving member 2031 drives the opening and closing member 2032 to drive multiple lifting members 201 to move closer to each other, so that the lifting part 2012 enters the receiving groove 104, so that the lifting member 201 can continue to lift the injection molded part located in the lower mold 102, and further the technical effect of continuous operation of the continuous injection mold 100 can be achieved.

[0069] Reference Figure 6 , Figure 7In some embodiments of the present application, the third connecting portion 2014 is configured as a third meshing tooth, the second transmission member 3013 is configured as a second rack, the second rack is extended along the length direction of the continuous injection mold 100, and the second rack can move along the length direction of the continuous injection mold 100 when driven by the second driving member.

[0070] Furthermore, the fourth meshing tooth of the second rack, which is opposite to the third meshing tooth, is configured as a fourth connecting portion 3014, the third meshing tooth is adapted to be meshed and connected with the fourth meshing tooth, and the second rack is meshed and connected with the second driving member, so that the second rack can drive the lifting member 201 to move closer to the lower mold 102, thereby achieving the technical effect of resetting the lifting member 201 to the initial position of the lower mold 102. Furthermore, by utilizing the third meshing tooth to be connected and matched with the second driving member and the third connecting portion 2014 at the same time, the functionality of the third meshing tooth can be improved.

[0071] Reference Figure 1 In some embodiments of the present application, the lifting member body 2011 is provided with a plurality of lifting parts 2012, and the plurality of lifting parts 2012 are sequentially spaced apart and arranged along the length direction of the continuous injection mold 100, and the end surfaces of the plurality of lifting parts 2012 extending into the injection gap are all arranged flush, and the plurality of lifting parts 2012 can synchronously lift the injection molded parts. Compared with setting a single lifting member 201 in the body of the lifting member 201, when a single lifting member 201 is damaged, the remaining undamaged lifting parts 2012 can lift the injection molded parts, so that the continuous injection mold 100 can continue to work normally, thereby improving the use experience of the continuous injection mold 100. In addition, by using a plurality of lifting parts 2012 to lift the injection molded parts, the volume of a single lifting part 2012 can be reduced, thereby reducing the manufacturing cost of the lifting member 201, and further reducing the manufacturing cost of the continuous injection mold 100.

[0072] Furthermore, multiple lifting parts 2012 are detachably connected to the lifting part 2012 body. When the lifting part 2012 is damaged, the damaged lifting part 2012 can be removed and replaced with the lifting part 2012 to be used. Such an arrangement can reduce the maintenance cost of the lifting member 201, thereby reducing the maintenance cost of the continuous injection mold 100.

[0073] Furthermore, the lower mold 102 and the support seat 103 are provided with a plurality of receiving grooves 104, and the spacing distance between any two adjacent lifting portions 2012 is equal to the spacing distance between any two adjacent receiving grooves 104, thereby ensuring that a plurality of lifting portions 2012 can be simultaneously extended into the corresponding receiving grooves 104, and avoiding interference between some lifting portions 2012 and the receiving grooves 104 as much as possible.

[0074] Reference Figure 2-Figure 4In some embodiments of the present application, the upper end wall of the lower mold 102 is provided with a plurality of injection molding protrusions 1021, and the plurality of injection molding protrusions 1021 are arranged in sequence along the length direction of the continuous injection mold 100, and the injection molding protrusions 1021 can be matched according to the shape of the lower end surface of the injection molded part, and the lower end wall of the upper mold 101 is provided with a plurality of injection molding recesses 1011, and the plurality of injection molding recesses 1011 are arranged in sequence along the length direction of the continuous injection mold 100, and the injection molding recesses 1011 can be matched according to the shape of the upper end surface of the injection molded part, and the plurality of injection molding recesses 1011 correspond one-to-one to the plurality of injection molding protrusions 1021, and the injection molding protrusions 1021 are suitable for extending into the injection molding recesses 1011, and an injection molding gap is formed between the injection molding protrusions 1021 and the injection molding recesses 1011, so that the shape of the injection molding gap can be matched with the design shape of the injection molded part, and further, the injection molding gap can shape the molten plastic particles into a strip-shaped injection molded part that meets the shape design requirements.

[0075] Reference Figure 2-Figure 4 In some embodiments of the present application, the cross-sectional dimension of at least one injection molding recess 1011 away from the support seat 103 among the multiple injection molding recesses 1011 is smaller than the cross-sectional dimension of the injection molding recess 1011 close to the support seat 103 among the multiple injection molding recesses 1011. That is to say, during the injection molding process of the injection molded part, the shape of the injection molded part formed by injection molding at the injection molding recess 1011 with a smaller cross-sectional dimension does not meet the design requirements. When the injection molding of the injection molded part is completed and part of the structure of the injection molded part is moved out from between the upper mold 101 and the lower mold 102, the other part of the structure of the injection molded part is located between the upper mold 101 and the lower mold 102. After the upper mold 101 and the lower mold 102 are molded together, when the continuous injection mold 100 is injection molded again, the injection molded part with incomplete structure extends into the injection molding recess 1011 close to the support seat 103, and the injection molded part whose shape does not meet the requirements can be again injected into an injection molded part whose shape meets the requirements, so that the technical effect of connecting two sections of the injection molded part can be achieved.

[0076] The upper mold 101 is also provided with a replacement part 1012, which is embedded in the end of the upper mold 101 close to the support seat 103. The replacement part 1012 has a first replacement part 1013 and a second replacement part 1014. The first replacement part 1013 and the second replacement part 1014 are symmetrically arranged along the central axis of the replacement part 1012. The first replacement part 1013 and the second replacement part 1014 are both suitable for being arranged opposite to the injection molding protrusion 1021. That is to say, the first replacement part 1013 can be arranged opposite to the injection molding protrusion 1021, or the second replacement part 1014 can be arranged opposite to the injection molding protrusion 1021. Specifically, the upper mold 101 has an avoidance groove 1016 opposite to the injection molding protrusion 1021, and the first replacement part 1013 and the second replacement part 1014 can both extend into the avoidance groove 1016 to be arranged opposite to the injection molding protrusion 1021.

[0077] Furthermore, the first replacement part 1013 and the second replacement part 1014 both have an injection molding depression 1011, and the injection molding depression 1011 of the first replacement part 1013 and the injection molding depression 1011 of the upper mold 101 can form a continuous injection molding depression group together, and the injection molding depression 1011 of the second replacement part 1014 and the injection molding depression 1011 of the upper mold 101 can form a continuous injection molding depression group together. By pulling out the replacement part 1012 from the avoidance groove 1016, then driving the replacement part 1012 to rotate 180° around the central axis of the replacement part 1012, and then inserting the replacement part 1012 into the avoidance groove 1016, the continuous injection mold 100 can select a suitable one of the first replacement part 1013 and the second replacement part 1014 according to processing needs to be arranged opposite to the injection molding protrusion 1021, so that the continuous injection mold 100 can be processed to form an injection molded part of a suitable shape.

[0078] Among them, the cross-sectional dimension of at least one injection molding recess 1011 of the first replacement part 1013 is smaller than the cross-sectional dimension of the injection molding recess 1011 of the second replacement part 1014. In some preferred embodiments, the cross-sectional dimension of at least one injection molding recess 1011 of the first replacement part 1013 close to the support seat 103 is the same as the cross-sectional dimension of the corresponding injection molding protrusion 1021. When the upper mold 101 and the lower mold 102 are molded together, the injection molding recess 1011 with a smaller cross-sectional dimension of the first replacement part 1013 cooperates with the corresponding injection molding protrusion 1021 without forming an injection molding gap, that is, the front end of the upper mold 101 and the lower mold 102 are closed after the upper mold 101 and the lower mold 102 are molded together. It should be noted that the front-to-back direction after the upper mold 101 and the lower mold 102 are molded together is Figure 2 The front-to-back direction.

[0079] The processing steps of injection molded parts can be divided into initial processing and laminating processing. During the initial processing, the first replacement part 1013 is connected and matched with the upper mold 101. After the upper mold 101 and the lower mold 102 are molded together, the front end is closed, and the molten plastic particles are not easy to overflow from the front end of the upper mold 101 and the lower mold 102. The injection molded parts formed between the upper mold 101 and the lower mold 102 are not easy to produce excessive defects such as edge burrs and holes. In this way, the continuous injection mold 100 can form injection molded parts with good quality during the initial processing.

[0080] During the beer-coating process, the second replacement part 1014 is connected and cooperated with the upper mold 101, and the injection-molded part on the support seat 103 enters between the upper mold 101 and the lower mold 102 through the open opening formed between the second replacement part 1014 and the lower mold 102. The plastic parts molded in the injection molding gap can be connected with the injection-molded parts on the support seat 103, thereby realizing the processing of longer strip-shaped injection-molded parts.

[0081] Reference Figure 2 , Figure 4 , Figure 5 In some embodiments of the present application, the continuous injection mold 100 further includes: a fifth driving member 1015, the replacement member 1012 is connected and matched with the fifth driving member 1015, and the fifth driving member 1015 is suitable for driving the replacement member 1012 to rotate around the central axis of the replacement member 1012, so that the first replacement part 1013 is arranged opposite to the injection protrusion 1021, or the second replacement part 1014 is arranged opposite to the injection protrusion 1021. It should be understood that before the fifth driving member 1015 drives the replacement member 1012 to rotate, the replacement member 1012 needs to be moved out of the avoidance groove 1016. In some embodiments, the fifth driving member 1015 can move the replacement member 1012 out of the avoidance groove 1016 from the top or side of the upper mold 101. In other embodiments, the replacement member 1012 can be moved out of the avoidance groove 1016 manually or by setting other driving members.

[0082] During the first processing, the fifth driving member 1015 drives the replacement member 1012 to rotate around the central axis of the replacement member 1012 so that the first replacement part 1013 is inserted into the avoidance groove 1016 of the upper mold 101. During the beer-making process, the fifth driving member 1015 drives the replacement member 1012 to rotate around the central axis of the replacement member 1012 so that the second replacement part 1014 is connected and matched with the upper mold 101. Compared with the operator rotating the replacement member 1012 with both hands, such a setting can reduce the difficulty of the operator's work, thereby improving the user experience of the continuous injection mold 100. In some embodiments, the fifth driving member 1015 can be a rotary hydraulic cylinder, but the present application is not limited thereto, and the fifth driving member 1015 can also be a motor, etc.

[0083] According to the continuous injection mold 100 described in the embodiment of the present application, the specific working principle of the continuous injection mold 100 is: after the injection molded part is formed in the injection gap, the ejector and the lifting member 201 move synchronously close to the upper mold 101 so that the injection molded part can be ejected from the lower mold 102; when the injection molded part is ejected to a preset height, the ejector separates from the injection molded part and moves close to the lower mold 102, the lifting member 201 continues to support the injection molded part, and the second driving member starts working to drive the lifting member 201 close to the support seat through the transmission assembly 301. 103 movement, when the lifting member 201 reaches the preset position, the second driving member stops working and the first driving member 202 starts working, the first driving member 202 drives the lifting member 201 to move close to the support seat 103, so that part of the structure of the injection molded part is placed on the support seat 103, when the injection molded part is placed on the support seat 103, the first driving member 202 stops working and the third driving member 2031 starts working, the third driving member 2031 drives the lifting members 201 to move away from each other through the opening and closing member 2032, so that the lifting members The lifting member 201 is separated from the receiving groove 104 and the lifting member 201 is connected and matched with the second transmission member 3013. When the lifting member 201 is connected and matched with the second transmission member 3013, the third driving member 2031 stops working and the second driving member starts working. The second driving member drives the lifting member 201 to move close to the lower mold 102 through the transmission assembly 301. When the lifting member 201 moves close to the lower mold 102 to a preset position, the second driving member stops working and the third driving member 2031 starts working. The lifting member 201 is driven to move closer to each other through the opening and closing member 2032 so that the lifting member 201 returns to the initial position. At this time, another part of the structure of the injection molded part is located between the upper mold 101 and the lower mold 102. When the upper mold 101 and the lower mold 102 stop again, the part of the structure of the injection molded part formed in the injection gap is connected with the other part of the structure of the injection molded part located on the support seat 103. By repeating the above steps, the continuous injection mold 100 can realize continuous processing of long-length strip-shaped injection molded parts.

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A continuous injection mold, characterized in that: include: A mold assembly (10), the mold assembly (10) comprising an upper mold (101), a lower mold (102) and a support seat (103), the support seat (103) and the lower mold (102) being arranged along the length direction of the continuous injection mold (100), the upper mold (101) and the lower mold (102) being arranged relative to each other, and the upper mold (101) being suitable for moving closer to or away from the lower mold (102), an injection gap being formed between the upper mold (101) and the lower mold (102) when the upper mold (101) and the lower mold (102) are in abutment with each other, the upper mold (101) having a feed port and a feed channel, the feed channel being connected between the feed port and the injection gap, and the support seat (103) being used for supporting an injection molded part to be injection molded in the injection gap; A demoulding mechanism, the demoulding mechanism comprising an ejector, the ejector passing through the lower mold (102) and used to eject the injection molded part from the lower mold (102); A lifting mechanism (20), the lifting mechanism (20) comprising a lifting member (201) and a first driving member (202), the lifting member (201) being connected and matched with the first driving member (202), and the lifting member (201) lifting or lowering the injection molded part when driven by the first driving member (202); A driving mechanism (30), the driving mechanism (30) comprising a transmission assembly (301) and a second driving member, the transmission assembly (301) being adapted to be transmission-connected between the second driving member and the lifting member (201), the second driving member being used to drive the lifting member (201) to move between the lower mold (102) and the support seat (103) through the transmission assembly (301), so that the lifting member (201) drives a part of the structure of the injection molded part to move out from between the upper mold (101) and the lower mold (102); The lifting member (201) comprises a lifting member body (2011) and a lifting portion (2012), wherein the lifting portion (2012) is arranged on the top wall of the lifting member body (2011), and the first driving member (202) is arranged on the bottom wall of the lifting member body (2011), and the first driving member (202) is suitable for connecting and cooperating with the lifting member body (2011); The side wall of the lower mold (102) and the side wall of the support seat (103) are both provided with a receiving groove (104), and the receiving groove (104) is used to receive the lifting part (2012), and when the lifting part (201) is driven by the first driving part (202), the lifting part (2012) extends into the receiving groove (104), or the lifting part (2012) extends out of the receiving groove (104) and stops against the injection molded part; The lifting member body (2011) is provided with a first connecting portion (2013), and the transmission assembly (301) includes a first transmission member (3011), and the first transmission member (3011) is provided with a second connecting portion (3012), and the first connecting portion (2013) and the second connecting portion (3012) are arranged opposite to each other, and after the lifting member (201) is lifted by the first driving member (202), the first connecting portion (2013) and the second connecting portion (3012) are connected and cooperated, and the second driving member is suitable for driving the first transmission member (3011) to drive the lifting member (201) to move from the lower mold (102) toward the support seat (103).

2. A continuous injection mold according to claim 1, characterized in that: The first connecting portion (2013) is configured as a first meshing tooth, the first transmission member (3011) is configured as a first rack, the first rack is extended along the length direction of the continuous injection mold (100), the second meshing tooth of the first rack opposite to the first meshing tooth is configured as the second connecting portion (3012), the first meshing tooth is suitable for meshing connection with the second meshing tooth, and the first rack is meshingly connected with the second driving member.

3. A continuous injection mold according to claim 1, characterized in that: The lifting mechanism (20) comprises a plurality of lifting members (201), and the plurality of lifting members (201) are arranged at intervals along the width direction of the continuous injection mold (100); The lifting mechanism (20) is further provided with an opening and closing assembly (203), the opening and closing assembly (203) comprising a third driving member (2031) and a plurality of opening and closing members (2032), the opening and closing members (2032) being connected between the third driving member (2031) and the lifting member (201), the third driving member (2031) being used to drive the opening and closing members (2032) to drive the plurality of lifting members (201) to move towards or away from each other; the lifting member body (2011) is provided with a third connecting portion (2014), the transmission assembly (301) comprising a third connecting portion (2014), and the transmission assembly (301) comprising a third connecting portion (2014). Two transmission members (3013), the second transmission member (3013) is provided with a fourth connection part (3014), the third connection part (2014) and the fourth connection part (3014) are arranged opposite to each other, after the plurality of lifting members (201) are separated from each other by the opening and closing assembly (203), the third connection part (2014) and the fourth connection part (3014) are connected and cooperated, and the second driving member is suitable for driving the second transmission member (3013) to drive the lifting member (201) to move from the support seat (103) toward the lower mold (102).

4. A continuous injection mold according to claim 3, characterized in that: The third connecting portion (2014) is configured as a third meshing tooth, the second transmission member (3013) is configured as a second rack, the second rack is extended along the length direction of the continuous injection mold (100), the fourth meshing tooth of the second rack opposite to the third meshing tooth is configured as the fourth connecting portion (3014), the third meshing tooth is suitable for meshing connection with the fourth meshing tooth, and the second rack is meshingly connected with the second driving member.

5. A continuous injection mold according to claim 1, characterized in that: The lifting member body (2011) is provided with a plurality of the lifting parts (2012), and the plurality of the lifting parts (2012) are sequentially spaced apart and arranged along the length direction of the continuous injection mold (100).

6. A continuous injection mold according to claim 1, characterized in that: The upper end wall of the lower mold (102) is provided with a plurality of injection molding protrusions (1021), and the plurality of injection molding protrusions (1021) are arranged in sequence along the length direction of the continuous injection mold (100); the lower end wall of the upper mold (101) is provided with a plurality of injection molding recesses (1011), and the plurality of injection molding recesses (1011) are arranged in sequence along the length direction of the continuous injection mold (100); the plurality of injection molding recesses (1011) correspond one-to-one to the plurality of injection molding protrusions (1021), and the injection molding protrusions (1021) are suitable for extending into the injection molding recesses (1011); and the injection molding gap is formed between the injection molding protrusions (1021) and the injection molding recesses (1011).

7. A continuous injection mold according to claim 6, characterized in that: The cross-sectional dimension of at least one of the plurality of injection molding recesses (1011) that is far from the support seat (103) is smaller than the cross-sectional dimension of the injection molding recess (1011) that is close to the support seat (103) among the plurality of injection molding recesses (1011); The upper mold (101) is also provided with a replacement part (1012), and the replacement part (1012) is embedded in the end of the upper mold (101) close to the support seat (103), and the replacement part (1012) has a first replacement part (1013) and a second replacement part (1014), and the first replacement part (1013) and the second replacement part (1014) are symmetrically arranged along the central axis of the replacement part (1012), and the first replacement part (1013) and the second replacement part (1014) are both suitable for being arranged opposite to the injection molding protrusion (1021), and the first replacement part (1013) and the second replacement part (1014) both have the injection molding recess (1011), and the cross-sectional size of at least one of the injection molding recesses (1011) of the first replacement part (1013) is smaller than the cross-sectional size of the injection molding recess (1011) of the second replacement part (1014).

8. A continuous injection mold according to claim 7, characterized in that: Also includes: A fifth driving member (1015), the replacement member (1012) is connected and cooperated with the fifth driving member (1015), and the fifth driving member (1015) is suitable for driving the replacement member (1012) to rotate around the central axis of the replacement member (1012) so that the first replacement part (1013) and the injection molding protrusion (1021) are arranged opposite to each other, or the second replacement part (1014) and the injection molding protrusion (1021) are arranged opposite to each other.

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