Production mold for rubber barrel with end cover and demolding method

Abstract

The invention discloses a rubber cylinder production mold with an end cover and a demolding method.The rubber cylinder production mold comprises a cylinder mold and an end cover mold, the cylinder mold comprises an outer mold, an inner mold, a cylinder top mold and a cylinder bottom mold, and the inner mold comprises at least two sliding inner mold cores arranged oppositely and at least two fixed inner mold cores arranged oppositely; the fixed inner mold core and the sliding inner mold core are distributed in a spaced mode, a core pulling cavity and a middle mold core matched with the core pulling cavity are arranged in the inner mold, the middle mold core is in a big-end-up conical shape, and a sliding fit structure is arranged between the middle mold core and the sliding inner mold core; the end cover mold comprises an end cover upper mold and an end cover lower mold, the end cover mold is provided with an adjustable support, the end cover mold can be supported on the adjustable support, and the inclination angle of the end cover mold can be adjusted and fixed through the adjustable support. And meanwhile, the mold is convenient to disassemble and assemble, time-saving and labor-saving, beneficial to improving the production efficiency, simple to operate and convenient to implement.

Description

Technical Field

[0001] The invention belongs to the field of mold structures, and in particular relates to a production mold for a rubber cylinder with an end cover and a demoulding method. Background Art

[0002] In the prior art, the production of gel or plastic products mainly adopts extrusion molding or injection molding, while the molding of cylindrical bodies usually needs to be combined with blow molding. Extrusion blow molding is a method for manufacturing hollow thermoplastic parts, such as the patent number "201510561981.1" and the name of the patent "A kind of oil drum blow molding mold".

[0003] However, during the research process, the applicant found that the currently used blow molding process is difficult to meet the production requirements of large-sized cylindrical bodies (usually referring to a length exceeding 1000mm, an outer diameter exceeding 300mm, and a wall thickness exceeding 15mm), and cracks are prone to occur. If a direct extrusion process is combined with an inner and outer mold, the existing molds have a large contact area and are mostly difficult to demold, or the demolding process is prone to damage the product. In addition, due to the thin end cap, flow difficulties often occur, resulting in a cavity area, etc. Therefore, there is an urgent need to improve the production process and equipment of large-sized rubber cylinders. Summary of the invention

[0004] In view of this, the present invention provides a production mold and demoulding method for a rubber cylinder with an end cover to solve the problems in the prior art that demoulding is difficult in the production process of large-sized rubber cylinders and production quality and efficiency are difficult to ensure.

[0005] The technical solution is as follows:

[0006] A production mold for a rubber cylinder with an end cover, the key of which is: comprising a cylinder mold and an end cover mold, wherein the cylinder mold comprises an outer mold, an inner mold, a cylinder top mold and a cylinder bottom mold, the inner mold comprises at least two sliding inner mold cores arranged opposite to each other and at least two fixed inner mold cores arranged opposite to each other, and the fixed inner mold cores and the sliding inner mold cores are distributed at intervals, the inner mold has a core-pulling cavity and an intermediate mold core adapted to the core-pulling cavity, the intermediate mold core is in a cone shape with a larger upper portion and a smaller lower portion, and has a sliding matching structure with the sliding inner mold core;

[0007] The end cap mold comprises an end cap upper mold and an end cap lower mold. The end cap mold is configured with an adjustable bracket. The end cap mold can be supported on the adjustable bracket and its inclination angle can be adjusted and fixed by the adjustable bracket.

[0008] The above scheme is mainly used to optimize the mold structure. The inner mold is set with a fixed inner mold core and a sliding inner mold core, and used in combination with the middle mold core. In this way, the inner mold can be quickly ejected by core pulling, which greatly reduces the demoulding difficulty and is conducive to improving the demoulding efficiency. At the same time, it avoids the impact of improper demoulding operation on product quality. In addition, the end cap mold is equipped with an adjustable bracket. The inclination angle of the end cap mold can be adjusted according to the injection amount and speed, as well as the heating and cooling process, to achieve better molding quality.

[0009] Preferably, the adjustable bracket has a movable base and a lifting base supported on the movable base, the lifting base has a fixed base on top, and the fixed base and the end cap mold have a rotating support structure and a locking structure that cooperate with each other. With the above solution, the mold position and height can be better adjusted to adapt to the production environment and the height of the extruder, etc.

[0010] As a preferred embodiment, the upper mold of the end cap has an open end mold material channel, and the end mold material channel is in a "V" shape. The above scheme is conducive to improving the fluidity of the rubber in the mold cavity, further improving production efficiency, and ensuring better product quality.

[0011] Preferably, the outer mold is a hierarchical structure, including at least two outer mold bodies, and flange connection structures are used between two adjacent outer mold bodies, and between the outer mold body and the cylinder top mold and the cylinder bottom mold. There is an ejection structure between the two adjacent outer mold bodies and between the outer mold body and the cylinder bottom mold. With the above scheme, the hierarchical outer mold structure is more convenient for the disassembly and assembly of the mold, and it is relatively easier to ensure the overall strength and quality, and it can also reduce the cost of large-size processing difficulty.

[0012] Preferably, the inner mold includes two sliding inner mold cores and two fixed inner mold cores, the middle mold core is in the shape of a quadrangular pyramid, the middle mold core is provided with T-shaped guide rails on the surfaces opposite to the sliding inner mold core and the fixed inner mold core, and the sliding inner mold core and the fixed inner mold core are provided with guide rail grooves that cooperate with the T-shaped guide rails. The above scheme is used to ensure that the sliding inner mold cores on both sides are synchronously and stably retracted during the lifting of the middle mold core, thereby preventing deformation caused by uneven force.

[0013] As a preferred embodiment, a linkage structure is provided between the middle mold core and the sliding inner mold core. With the above solution, the sliding inner mold core can be lifted out while the middle mold core is lifted, thus shortening the demoulding time.

[0014] Preferably, the middle mold core is a hollow structure, and has a socket disposed opposite to the sliding inner mold core, the socket is provided with a stopper block adapted thereto, and the top of the sliding inner mold core has a stopper block fixing screw hole for fixing the stopper block. The above solution is easy to implement and cost-effective, and is easy to promote.

[0015] Preferably, the cylinder top mold and the outer mold, as well as the sliding inner mold cores and the fixed inner mold cores, have mutually matching connection structures.

[0016] As a preferred embodiment: the bottom of the middle mold core has evenly distributed cone pins, and the bottom mold of the cylinder has positioning holes that transition with the cone pins. The above solution is conducive to ensuring the stability of the middle mold core. When the middle mold core is stable, the inner mold and the middle mold core are slid together and then lowered to the bottom as a whole, which is conducive to ensuring the mold cavity shape and shortening the mold loading time.

[0017] Based on the above-mentioned production mold of the rubber cylinder with end cap, the present application also proposes a corresponding demoulding method, and its technical solution is as follows:

[0018] A demoulding method for a production mold of a rubber cylinder with an end cover comprises the following steps:

[0019] S1. Hoist the cylinder mold into the foundation pit and keep it vertically stable;

[0020] S2. Remove the bolts between the top mold and the outer mold of the cylinder, and separate the top mold of the cylinder from the outer mold with a top screw;

[0021] S3, hoist the cylinder top mold and the middle mold core as a whole, the middle mold core drives the sliding inner mold core to shrink inward, when the cylinder top mold is hoisted by a distance L, the sliding inner mold core and the middle mold core are connected by the stop block, and the cylinder top mold is continued to be lifted, and the sliding inner mold core is hoisted out together;

[0022] S4, remove the fixed inner mold core and the outer mold body on top, and then lift out the rubber cylinder;

[0023] S5. Finally, remove the bottom outer mold body.

[0024] By adopting the above scheme, the demoulding process is simple to operate, convenient and reliable.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The production mold and demoulding method of the rubber cylinder with end cover provided by the present invention can meet the production needs of large-size products. At the same time, the mold is easy to disassemble and assemble, saving time and labor, which is conducive to improving production efficiency, simple operation, and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 for Figure 1 Sectional view;

[0029] Figure 3 This is a schematic diagram of demoulding the sliding inner mold core;

[0030] Figure 4 It is a schematic diagram of the main structure of the outer mold;

[0031] Figure 5 for Figure 3 Schematic diagram of the relative position of the middle mold core and the inner mold;

[0032] Figure 6 It is a schematic diagram of the structure of the middle mold core;

[0033] Figure 7 for Figure 6 Sectional view;

[0034] Figure 8 It is a schematic diagram of the inner mold structure;

[0035] Fig. 9 It is a schematic diagram of the bottom mold structure of the cylinder;

[0036] Fig.10 This is a schematic diagram of the installation and use status of the end cap mold and the adjustable bracket;

[0037] Fig.11 Schematic diagram of the end cap mold structure;

[0038] Fig.12 for Fig.11 Bottom structure diagram

[0039] Fig.13 This is a schematic diagram of the inner mold and mold core assembly structure;

[0040] Fig.14 It is a schematic diagram of the upper mold structure of the end cover;

[0041] Fig.15 It is a schematic diagram of the lower die structure of the end cover;

[0042] Fig.16 This is a schematic diagram of the finished product of the rubber cylinder with end caps. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] refer to Figures 1 to 16 The production mold and demoulding method of the rubber cylinder with end cap shown in the figure are as follows: Fig.16 As shown, the rubber cylinder body 400 with end cover of the present application mainly includes a rubber cylinder body 410 and an end cover 420. One end of the rubber cylinder body 410 is open, and the end cover 420 can cover the open end of the rubber cylinder body 410. In addition, the closed end of the rubber cylinder body 410 and the end cover 420 are provided with a through hole 430. Therefore, the mold of the present application mainly includes a cylinder mold 100 and an end cover mold 200.

[0045] The cylinder mold 100 includes an outer mold 110, an inner mold 120, a cylinder top mold 130 and a cylinder bottom mold 140. The inner mold 120 includes at least two sliding inner mold cores 121 and at least two fixed inner mold cores 122 that are arranged opposite to each other, and the fixed inner mold cores 122 and the sliding inner mold cores 121 are distributed at intervals. The inner mold 120 has a core pulling cavity 123 and an intermediate mold core 150 that is adapted to the core pulling cavity 123. The intermediate mold core 150 is conical in shape with a larger upper portion and a smaller lower portion, and has a sliding matching structure with the sliding inner mold core 121. The cylinder top mold 130 and the outer mold 110, as well as each sliding inner mold core 121 and the fixed inner mold core 122, all have mutually matching connection structures. The outer mold 110, the inner mold 120, the cylinder top mold 130 and the cylinder bottom mold 140 together form a cylinder cavity 160.

[0046] The end cap mold 200 includes an end cap upper mold 210 and an end cap lower mold 220 . The end cap mold 200 is provided with an adjustable bracket 300 . The end cap mold 200 can be supported on the adjustable bracket 300 , and its tilt angle can be adjusted and fixed by the adjustable bracket 300 .

[0047] Key References Figures 10 to 15 In the present application, the adjustable bracket 300 has a movable base 310 and a lifting base 320 supported on the movable base 310, and the top of the lifting base 320 has a fixed base 330, and the fixed base 330 and the end cover mold 200 have a rotating support structure and a locking structure that cooperate with each other. As shown in the figure, the movable base 310 has a universal pulley, the lifting base 320 adopts a conventional hydraulic fork structure, the top two sides of the fixed base 330 have symmetrically arranged bearings 331, and the two sides of the end cap mold 200 have rotating shafts 250 adapted to the bearings 331. It should be noted that in order to ensure the stability of the end cap mold 200 during the rotation process in the present application, the end cap upper mold 210 and the end cap lower mold 220 both have connecting holes 230 arranged corresponding to the rotating shaft 250, that is, the rotating shaft 250 is connected to the end cap upper mold 210 and the end cap lower mold 220 at the same time, and then supported on the bearing 331. At the same time, a tightening screw 332 arranged opposite to the rotating shaft 250 is provided on the fixed base 330. When the tightening screw 332 is tightened against the rotating shaft 250, the end cap mold 200 is in a relatively fixed state. When the tightening screw 332 is loosened, the angle of the end cap mold 200 can be adjusted as needed.

[0048] As shown in the figure, the end cap upper mold 210 and the end cap lower mold 220 are enclosed to form an end cap cavity 260. The end cap cavity 260 has an end mold channel 211. The end mold channel 211 is open. It should be noted that the end mold channel 211 is mainly formed on the end cap upper mold 210 and is generally "V" shaped. At the same time, three exhaust valves 214 are provided on the end cap upper mold 210. The exhaust valves 214 and the end mold channel 211 are respectively located on the two opposite sides of the end cap cavity 260 in the radial direction, that is, when the end cap mold 200 is vertically arranged, the exhaust valves 214 are at the highest position of the end cap cavity 260, which is relatively easier to exhaust air and facilitate glue molding. In addition, the exhaust valves 214 are located on the end cap upper mold 210, which is also beneficial to the end cap molding.

[0049] In order to ensure the stability of the end cap mold 200 in the present application, a plurality of main connecting bolts are arranged on the outer side of the end cap cavity 260 to connect and fix the end cap upper mold 210 and the end cap lower mold 220. As shown in the figure, a plurality of main connecting bolts are inserted from the bottom of the end cap lower mold 220 to connect and fix the end cap upper mold 210. In addition, within the range of the end cap cavity 260, a secondary connecting bolt 213 is arranged. The end cap upper mold 210 has a correspondingly arranged through hole 212, and the through hole 212 is stepped in shape with a larger inner side and a smaller outer side, and the end cap lower mold 220 has a through hole 212 that is corresponding to the through hole 212. The column 221 is adapted to have a connecting screw hole 222 which is threadedly matched with the auxiliary connecting bolt 213. When the end cover upper mold 210 and the end cover lower mold 220 are matched up and down, the column 221 can be just inserted into the through hole 212, and then the auxiliary connecting bolt 213 is threadedly matched with the connecting screw hole 222, which can further improve the connection stability between the end cover upper mold 210 and the end cover lower mold 220. In addition, in this embodiment, the position of the column 221 corresponds to the position of the through hole 430 on the end cover 420, thereby simultaneously constituting a molding structure of the through hole 430.

[0050] Key References Figures 1 to 9 In the present application, the outer mold 110 is a hierarchical structure, including at least two outer mold bodies 111. A flange connection structure is adopted between two adjacent outer mold bodies 111, and between the outer mold body 111 and the cylinder top mold 130 and the cylinder bottom mold 140, and there is an ejection structure between two adjacent outer mold bodies 111 and between the outer mold body 111 and the cylinder bottom mold 140.

[0051] As shown in the figure, the outer mold body 111 is generally in a hollow columnar structure, with flanges at both axial ends. The upper flange of the outer mold body 111 has blind holes 113 symmetrically arranged along its radial direction, and the lower flange of the outer mold body 111 has ejector screw holes 112 arranged opposite to the blind holes 113. Correspondingly, the cylinder top mold 130 also has ejector screw holes corresponding to the blind holes 113. In this way, when dismantling is required, the ejector screw can be screwed into the corresponding ejector screw hole 112, and continuously screwed in to abut against the blind hole 113 directly below, so that the upper component can be separated from the lower component more quickly, thereby achieving the purpose of rapid demoulding.

[0052] In this embodiment, the inner mold 120 is a multi-petal structure, including two sliding inner mold cores 121 and two fixed inner mold cores 122. The middle mold core 150 is in the shape of a quadrangular pyramid. The middle mold core 150 is provided with T-shaped guide rails 124 on the opposite surfaces of the sliding inner mold core 121 and the fixed inner mold core 122. The sliding inner mold core 121 and the fixed inner mold core 122 are provided with guide rail grooves 125 that cooperate with the T-shaped guide rails 124. The top of the guide rail grooves 125 is open, so that the middle mold core 150 can be directly inserted into the core pulling cavity 123 from above.

[0053] It should be noted that in order to ensure that the sliding inner mold core 122 can be retracted under the action of the middle mold core 150, the corresponding chord length of the sliding inner mold core 121 is smaller than the chord length of the fixed inner mold core 122, that is, the inner side of the sliding inner mold core 121 is located between the two fixed inner mold cores 122. In order to further improve the reliability of retraction, the sliding inner mold core 121 has a conical structure with a larger top and a smaller bottom in the length direction, that is, the corresponding chord length of the sliding inner mold core 121 gradually decreases from top to bottom. When the sliding inner mold core 121 is retracted, it is separated from the rubber cylinder body 410 to facilitate removal.

[0054] On this basis, there is a linkage structure between the middle mold core 150 and the sliding inner mold core 121. Specifically, the middle mold core 150 is a hollow structure, and has a plug hole 151 arranged opposite to the sliding inner mold core 121, and the plug holes 151 are distributed along its length. At the same time, the plug hole 151 is equipped with a stopper 152 adapted thereto, and the top of the sliding inner mold core 121 has a stopper fixing screw hole 1210 for fixing the stopper 152, so that when the middle mold core 150 is lifted to a certain height, the sliding inner mold core 121 is separated from the rubber cylinder body 410, and at this time, the fixed stopper 152 is inserted into the plug hole 151 and fixedly connected to the sliding inner mold core 121, and when the middle mold core 150 is continued to be lifted, the sliding inner mold core 121 can be lifted out together.

[0055] The middle part of the middle mold core 150 has a cavity 154 arranged along its axis, and the cavity 154 can be used to install and fix the air pipe 170. During the extrusion process, hot air is introduced into the air pipe 170 to achieve rapid heating and insulation of the mold. During the cooling process, cold air can be introduced into the air pipe 170 to meet more cooling needs. The hollow structure of the middle mold core 150 is also conducive to the rapid adjustment and control of the inner mold temperature.

[0056] like Figure 2 and Fig. 9 As shown, the injection port of the barrel cavity 160 is located at the bottom, and the middle of the barrel bottom mold 140 is provided with an injection hole 142, and the injection hole 142 is used to install and connect the extrusion tube 180.

[0057] In order to ensure the structural quality of the cylinder cavity 160 and prevent the inner mold 120 from being deflected, the bottom of the middle mold core 150 has evenly distributed cone pins 153, and the cylinder bottom mold 140 has positioning holes 141 that transitionally match the cone pins 153.

[0058] When installing the cylinder mold 100, first fix the cylinder bottom mold 140 on the installation base 500, connect and fix the lowermost outer mold body 111 to the cylinder bottom mold 140, install the assembled inner mold 120 into the outer mold body 111, and then install the upper outer mold body 111, and finally install the cylinder top mold 130, and respectively connect the cylinder top mold 130 with the inner mold 120 and the top outer mold body 111.

[0059] Based on the above-mentioned production mold of the rubber cylinder with end cap, the present application also simultaneously proposes a corresponding demoulding method, which is mainly aimed at demoulding the cylinder mold 100, and specifically includes the following steps:

[0060] The first step is to hoist the cylinder mold 100 into the foundation pit and keep it vertically stable to prevent deflection.

[0061] The second step is to remove the bolts between the cylinder top mold 130 and the outer mold 110 (i.e., the uppermost outer mold body 111), and separate the cylinder top mold 130 from the outer mold 110 with a top screw to prevent adhesion.

[0062] The third step is to hoist the cylinder top mold 130 and the middle mold core 150 as a whole. The middle mold core 150 drives the sliding inner mold core 121 to shrink inward. When the cylinder top mold 130 is lifted by a distance L (the distance is usually 400-600mm), the sliding inner mold core 121 is retracted about 5-10mm, so that the sliding inner mold core 121 is separated from the rubber cylinder body 410. One of the plug holes 151 is just flush with the upper end surface of the sliding inner mold core 121. Then the sliding inner mold core 121 and the middle mold core 150 are connected by the stop block 152. Continue to lift the cylinder top mold 130, and the sliding inner mold core 121 can be lifted out together.

[0063] Step 3: Remove the fixed inner mold core 122 and the outer mold body 111 located above, and then hang out the rubber cylinder body 410.

[0064] Step 5: Finally, remove the lowermost outer mold body 111 and the cylinder bottom mold 140.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A production mold for a rubber cylinder with an end cap, characterized in that: The invention comprises a barrel mold (100) and an end cover mold (200), wherein the barrel mold (100) comprises an outer mold (110), an inner mold (120), a barrel top mold (130) and a barrel bottom mold (140), the inner mold (120) comprises at least two oppositely arranged sliding inner mold cores (121) and at least two oppositely arranged fixed inner mold cores (122), and the fixed inner mold cores (122) and the sliding inner mold cores (121) are spaced apart, the inner mold (120) has a core-pulling cavity (123) and an intermediate mold core (150) adapted to the core-pulling cavity (123), the intermediate mold core (150) is in a conical shape with a larger upper portion and a smaller lower portion, and has a sliding matching structure with the sliding inner mold core (121); The end cap mold (200) comprises an end cap upper mold (210) and an end cap lower mold (220). The end cap mold (200) is provided with an adjustable bracket (300). The end cap mold (200) can be supported on the adjustable bracket (300) and its inclination angle can be adjusted and fixed by the adjustable bracket (300).

2. The production mold for the rubber cylinder with end cap according to claim 1, characterized in that: The adjustable bracket (300) comprises a movable base (310) and a lifting base (320) supported on the movable base (310); the lifting base (320) has a fixed base (330) on the top; and the fixed base (330) and the end cover mold (200) have a rotating support structure and a locking structure that cooperate with each other.

3. The production mold for the rubber cylinder with end cap according to claim 1 or 2, characterized in that: The end cover upper mold (210) has an open end mold channel (211), and the end mold channel (211) is in a "V" shape.

4. The production mold for the rubber cylinder with end cap according to claim 1, characterized in that: The outer mold (110) is a hierarchical structure, comprising at least two outer mold bodies (111), and a flange connection structure is adopted between two adjacent outer mold bodies (111), and between the outer mold body (111) and the cylinder top mold (130) and the cylinder bottom mold (140). An ejection structure is provided between the two adjacent outer mold bodies (111) and between the outer mold body and the cylinder bottom mold (140).

5. The production mold for the rubber cylinder with end cap according to claim 1 or 4, characterized in that: The inner mold (120) comprises two sliding inner mold cores (121) and two fixed inner mold cores (122); the middle mold core (150) is in the shape of a quadrangular pyramid; the middle mold core (150) is provided with a T-shaped guide rail (124) on the surface opposite to the sliding inner mold core (121) and the fixed inner mold core (122); and the sliding inner mold core (121) and the fixed inner mold core (122) are provided with a guide rail groove (125) that cooperates with the T-shaped guide rail (124).

6. The production mold for the rubber cylinder with end cap according to claim 5, characterized in that: A linkage structure is provided between the middle mold core (150) and the sliding inner mold core (121).

7. The production mold for the rubber cylinder with end cap according to claim 6, characterized in that: The middle mold core (150) is a hollow structure, and has a plug hole (151) arranged opposite to the sliding inner mold core (121). The plug hole (151) is provided with a stop block (152) adapted thereto, and the top of the sliding inner mold core (121) has a stop block fixing screw hole (1210) for fixing the stop block (152).

8. The production mold for the rubber cylinder with end cap according to claim 1 or 4, characterized in that: The cylinder top mold (130) and the outer mold (110), as well as the sliding inner mold cores (121) and the fixed inner mold cores (122) are all provided with mutually matching connection structures.

9. The production mold for the rubber cylinder with end cap according to claim 1 or 4, characterized in that: The bottom of the middle mold core (150) is provided with evenly distributed cone pins (153), and the cylinder bottom mold (140) is provided with positioning holes (141) which are transitionally matched with the cone pins (153).

10. The demoulding method of a production mold for a rubber cylinder with an end cover according to any one of claims 1 to 9, characterized in that: The steps include: S1. Hoist the cylinder mold (100) into the foundation pit and keep it vertically stable; S2, removing the bolts between the cylinder top mold (130) and the outer mold (110), and separating the cylinder top mold (130) from the outer mold (110) with a top screw; S3, hoisting the cylinder top mold (130) and the middle mold core (150) as a whole, the middle mold core (150) drives the sliding inner mold core (121) to retract inwards, when the cylinder top mold (130) is hoisted a distance L, the sliding inner mold core (121) and the middle mold core (150) are connected by the stop block (152), and the cylinder top mold (130) is continuously hoisted to hoist out the sliding inner mold core (121) together; S4, removing the fixed inner mold core (122) and the outer mold body (111) located above, and then lifting the rubber cylinder body out; S5. Finally, remove the lowermost outer mold body (111).

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