阅读说明：本技术 一种义齿石膏模型围模灌注盒及其使用方法 (False tooth gypsum model surrounding mould filling box and using method thereof ) 是由 王华明 郑伟 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种义齿石膏模型围模灌注盒及其使用方法,围模灌注盒包括第一模体和第二模体,两者拼合成围模灌注盒,设置在第一模体中的第一凸起与设置在第二模体中的第二凸起拼合成限位凸起,开设在第一模体中的第一开口和开设在第二模体上的第二开口拼合成用于放置转移杆的第一通孔；还包括用于控制第一模体与第二模体拼合定位的限位部,以及用于紧固拼合后第一模体和第二模体的紧固部。本发明的围模灌注盒在灌注过程中转移杆及转印模均能被稳定地限制,限位部及紧固部的设置使得制作的石膏模型整体美观较高,且后续打磨工序的工作量大大减少,提高了石膏模型的加工质量及加工效率；另外,围模灌注盒可重复使用,更有利于环保。(The invention discloses a false tooth plaster model surrounding mould pouring box and a use method thereof, wherein the surrounding mould pouring box comprises a first mould body and a second mould body which are spliced into the surrounding mould pouring box, a first bulge arranged in the first mould body and a second bulge arranged in the second mould body are spliced into a limiting bulge, and a first opening arranged in the first mould body and a second opening arranged on the second mould body are spliced into a first through hole for placing a transfer rod; the die body further comprises a limiting part used for controlling the splicing and positioning of the first die body and the second die body, and a fastening part used for fastening the spliced first die body and the second die body. The transfer rod and the transfer mold can be stably limited in the filling process of the enclosing mold filling box, the manufactured plaster model is attractive and high in overall appearance due to the arrangement of the limiting part and the fastening part, the workload of a subsequent polishing procedure is greatly reduced, and the processing quality and the processing efficiency of the plaster model are improved; in addition, the surrounding mould filling box can be repeatedly used, and is more beneficial to environmental protection.)

1. A false tooth gypsum model surrounding mould pouring box comprises a first mould body and a second mould body, wherein the first mould body comprises a first bottom wall and a first side wall, the second mould body comprises a second bottom wall and a second side wall, the first mould body and the second mould body are spliced to form the surrounding mould pouring box, and the spliced first mould body and the spliced second mould body form a pouring mould cavity in a surrounding manner; after the first mold body and the second mold body are spliced into the surrounding mold pouring box, the first bulge and the second bulge are spliced into a limiting bulge, and the first opening and the second opening are spliced into a first through hole for placing a transfer rod;

the die body further comprises a limiting part used for controlling the splicing and positioning of the first die body and the second die body and a fastening part used for fastening the spliced first die body and the second die body.

2. The denture plaster model surrounding mould pouring box according to claim 1, wherein the limiting part comprises at least one limiting boss arranged on the outer side surface of the first mould body, a limiting plate is arranged on the outer side surface of the second mould body, a corresponding number of limiting grooves are arranged on the limiting plate and correspond to the limiting bosses, and the limiting bosses can slide in the limiting grooves until the first mould body is in contact with the second mould body.

3. The denture plaster model surrounding mould pouring box according to claim 2, wherein the fastening part comprises at least one elastic limiting ring sleeved on the outer wall of the surrounding mould pouring box.

4. The denture plaster model surrounding mold pouring box according to claim 2, wherein the fastening portion comprises a fastening hole arranged on the limiting plate, the fastening hole is arranged towards the limiting groove, a fastening piece is screwed in the fastening hole, and the fastening piece is rotated to abut against the limiting boss inserted in the limiting groove, so that the limiting boss is fixed in the limiting groove.

5. The denture plaster model surrounding mold pouring box according to claim 2, wherein the fastening portion comprises a springy hoop, the springy hoop is of an open end structure, the springy hoop is sleeved on the outer side wall of the surrounding mold pouring box, two sides of the open end of the springy hoop are respectively provided with a connecting plate, the connecting plates are respectively provided with an adjusting long hole, a tensioning member penetrates through the adjusting long holes, the tensioning member can tension the two connecting plates, and the springy hoop can firmly combine the first mold body and the second mold body on two sides of the surrounding mold pouring box.

6. The denture plaster model surrounding mould pouring box according to claim 1, wherein the limiting part comprises a limiting bottom plate arranged at the bottom of the first mould body, the upper plane of the limiting bottom plate is flush with the bottom surfaces of the first mould body and the second mould body, the limiting part further comprises a limiting side plate arranged on the outer side wall of the second mould plate, the limiting side plate and the second side wall form a limiting groove, and after the assembly, the first side wall is positioned in the limiting groove.

7. The denture plaster model surrounding mould pouring box according to claim 6, wherein the fastening portion comprises a fastening groove arranged on the first side wall, a first clamping end is further arranged on one side of the fastening groove facing the second mould body, the first clamping end is a wedge-shaped step, a second clamping end is arranged on the corresponding limiting side plate, the second clamping end is arranged opposite to the surrounding mould cavity, and when the first mould body and the second mould body are spliced, the second clamping end enters the fastening groove along the wedge-shaped step and is clamped with the first clamping end for fastening the first mould body and the second mould body.

8. The denture plaster model surrounding mould pouring box according to claim 7, wherein the cross section of the fastening clamping groove in the horizontal direction is rectangular, the length along the direction of the first side wall is greater than the length vertical to the direction of the first side wall, a support rod is inserted into the fastening clamping groove, the cross section of the support rod in the horizontal direction is in a smooth shape, and the length of the smooth shape along the direction of the first side wall is larger than the length of the smooth shape perpendicular to the direction of the first side wall, the supporting rod can rotate in the fastening clamping groove, when the supporting rod rotates in the fastening clamping groove, the supporting rod can jack up the side wall where the first clamping end is located to be far away from the first side wall, the second clamping end can be released from the first clamping end, and the first die body is separated from the second die body; when the supporting rod is rotated again, the fastening clamping groove is restored to the original state.

9. The denture plaster model surrounding mold pouring box according to any one of claims 1 to 8, wherein each of the first bottom wall and the second bottom wall is provided with a demolding hole for facilitating demolding.

10. The use method of the pouring box for the plaster of denture mold according to any one of claims 1 to 9, comprising the following steps,

s1, placing a transfer rod with a silicon rubber transfer mold at the first opening or the second opening; a dental model is placed on the silica gel impression model in advance at the false tooth to be processed;

s2, enabling the second mold body or the first mold body to be close to the first mold body or the second mold body, accurately splicing the first mold body and the second mold body into the surrounding mold filling box under the limitation of the limiting part, and enclosing the surrounding mold cavity by the first bottom wall, the second bottom wall, the first side wall and the second side wall;

s3, fastening the first mold body and the second mold body after being assembled together by using the fastening portion;

s4, pouring liquid gypsum into the surrounding mould cavity, oscillating to discharge air bubbles, and standing to form a mould;

and S5, releasing the fastening part, and separating the first mold body and the second mold body to obtain the plaster model.

Technical Field

The invention relates to the technical field of false tooth plaster model manufacturing, in particular to a false tooth plaster model surrounding mould filling box and a using method thereof.

Background

In the denture processing process, the plaster model is the first step of denture processing and is an individualized platform for manufacturing the denture, the plaster model is a model for simulating the conditions of teeth and jaw bones in the oral cavity of a patient, and the denture is finished on the model, so that the quality of the plaster model directly influences the denture processing precision. The gypsum model is generally manufactured by a surrounding mould filling method, the traditional surrounding mould filling method is generally to directly surround a circle of sticky wax on a rotary impression mould and fill the mould by using the gypsum after a wax sheet is used for surrounding the mould, the method is complex to operate, the filling effect depends on the technical level of operators to a great extent, the wax sheet is disposable and is not environment-friendly enough, the model is generally rough, and a large amount of finishing is needed subsequently. The existing part discloses a surrounding mould method using a metal or plastic base and a paper adhesive tape, the base can be reused, but the paper adhesive tape has the same defect as a wax sheet surrounding mould, namely the forming effect is required to be dependent on the level of an operator, the mould is rough, liquid gypsum often flows out in the filling process, and in addition, the paper adhesive tape is disposable and is seriously wasted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the surrounding mould filling box which has a good forming effect and can be repeatedly used.

The object of the invention is achieved in the following way:

a false tooth gypsum model surrounding mould pouring box comprises a first mould body and a second mould body, wherein the first mould body comprises a first bottom wall and a first side wall, the second mould body comprises a second bottom wall and a second side wall, the first mould body and the second mould body are spliced to form the surrounding mould pouring box, the spliced first mould body and the second mould body surround a pouring mould cavity, a first bulge and a first opening are formed in the first mould body, and a second bulge and a second opening are formed in the second mould body; after the first mold body and the second mold body are spliced into the surrounding mold pouring box, the first bulge and the second bulge are spliced into a limiting bulge, and the first opening and the second opening are spliced into a first through hole for placing a transfer rod; the die body further comprises a limiting part used for controlling the splicing and positioning of the first die body and the second die body and a fastening part used for fastening the spliced first die body and the second die body.

As an alternative of the technical scheme of the invention, the limiting part comprises at least one limiting boss arranged on the outer side surface of the first die body, a limiting plate is arranged on the outer side surface of the second die body, a corresponding number of limiting grooves are arranged on the limiting plate at positions corresponding to the limiting bosses, and the limiting bosses can slide in the limiting grooves until the first die body is in contact with the second die body.

As an alternative of the technical solution of the present invention, the fastening portion includes at least one elastic limiting ring sleeved on an outer wall of the injection box of the surrounding mold.

As an alternative of the technical scheme of the invention, the fastening portion comprises a fastening hole arranged on the limiting plate, the fastening hole is arranged towards the limiting groove, a fastening piece is screwed in the fastening hole, and the fastening piece is rotated to abut against the limiting boss inserted in the limiting groove, so that the limiting boss is fixed in the limiting groove.

As an alternative of the technical scheme of the invention, the fastening portion comprises an elastic clamp, the elastic clamp is of an open-ended structure, the elastic clamp is sleeved on the outer side wall of the surrounding mould perfusion box, two sides of the open end of the elastic clamp are respectively provided with a connecting plate, the connecting plates are respectively provided with an adjusting long hole, a tensioning member penetrates through the adjusting long holes, and the tensioning member can tension the two connecting plates so that the elastic clamp can firmly splice the first mould body and the second mould body on the two sides of the surrounding mould perfusion box.

As an alternative of the technical scheme of the invention, the limiting portion comprises a limiting bottom plate arranged at the bottom of the first die body, the upper plane of the limiting bottom plate is flush with the bottom surfaces of the first die body and the second die body, the limiting portion further comprises a limiting side plate arranged on the upper outer side wall of the second die plate, a limiting groove is formed between the limiting side plate and the second side wall, and after splicing, the first side wall is located in the limiting groove.

As an alternative of the technical scheme of the invention, the fastening portion includes a fastening slot disposed on the first side wall, a first engaging end is further disposed on one side of the fastening slot facing the second mold body, the first engaging end is a wedge-shaped step, a second engaging end is disposed on the corresponding limiting side plate, the second engaging end is disposed opposite to the mold cavity, and when the first mold body and the second mold body are assembled together, the second engaging end enters the fastening slot along the wedge-shaped step and is fastened with the first engaging end to fasten the first mold body and the second mold body.

As an alternative of the technical scheme of the invention, the cross section of the fastening slot in the horizontal direction is rectangular, the length of the fastening slot in the direction along the first side wall is greater than the length of the fastening slot in the direction perpendicular to the first side wall, a support rod is inserted into the fastening slot, the cross section of the support rod in the horizontal direction is in a smooth shape, the length of the smooth shape in the direction along the first side wall is greater than the length of the support rod in the direction perpendicular to the first side wall, the support rod can rotate in the fastening slot, when the support rod rotates in the fastening slot, the support rod can jack up the side wall where the first clamping end is located to be far away from the first side wall, so that the second clamping end can be released from the first clamping end, and the first mold body is separated from the second mold body; when the supporting rod is rotated again, the fastening clamping groove is restored to the original state.

As an alternative of the technical solution of the present invention, the first bottom wall and the second bottom wall are both provided with demolding holes facilitating demolding.

The invention also discloses a using method of the false tooth plaster model surrounding mould pouring box, which comprises the following steps,

s1, placing a transfer rod with a silicon rubber transfer mold at the first opening or the second opening; a dental model is placed on the silica gel impression model in advance at the false tooth to be processed;

s2, enabling the second mold body or the first mold body to be close to the first mold body or the second mold body, accurately splicing the first mold body and the second mold body into the surrounding mold filling box under the limitation of the limiting part, and enclosing the surrounding mold cavity by the first bottom wall, the second bottom wall, the first side wall and the second side wall;

s3, fastening the first mold body and the second mold body after being assembled together by using the fastening portion;

s4, pouring liquid gypsum into the surrounding mould cavity, oscillating to discharge air bubbles, and standing to form a mould;

and S5, releasing the fastening part, and separating the first mold body and the second mold body to obtain the plaster model.

The invention has the beneficial effects that:

the enclosing mold perfusion box can avoid the transfer rod in the using process, the transfer rod cannot be influenced, and the limiting bulge is used for limiting the silicon rubber transfer mold; the silicon rubber transfer mold is prevented from moving in the pouring process, and meanwhile, the transfer rod is limited in the first through hole, and the transfer rod is prevented from moving in the pouring process.

The arrangement of the limiting parts ensures that the first die body and the second die body are accurately spliced, so that the precision of pouring the gypsum model is ensured; the fastening part can fasten and splice the first mold body and the second mold body, so that gypsum liquid is prevented from flowing out of a splicing seam spliced by the first mold body and the second mold body, the manufactured gypsum model is attractive and high in overall appearance, the workload of a subsequent polishing procedure is greatly reduced, and the processing quality and the processing efficiency of the gypsum model are improved; in addition, the first mold body, the second mold body, the limiting part and the fastening part can be reused, and the environment is protected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an exploded view of a cast-in-place pour box (without fasteners) in an embodiment of the present invention.

Fig. 2 is a top view of the view of fig. 1.

Fig. 3 is a schematic structural diagram in embodiment 1 of the present invention.

Fig. 4 is a top view of the view of fig. 3.

Fig. 5 is a schematic structural diagram in embodiment 2 of the present invention.

Fig. 6 is a top view of the view of fig. 5.

Fig. 7 is a schematic view at section B-B in fig. 6.

Fig. 8 is a schematic structural diagram in embodiment 3 of the present invention.

Fig. 9 is a schematic structural diagram in embodiment 4 of the present invention.

Fig. 10 is a top view of the view of fig. 9.

Fig. 11 is a partial enlarged view of a portion a in fig. 10.

FIG. 12 is a rear side view of the first body and the second body of embodiment 4 in a separated state.

Reference numerals:

100-surrounding mould filling box; 110-a first mold body; 111-a first bottom wall; 112-a first side wall; 113-a first protrusion; 114-a first opening; 115-a limit boss; 116-a limiting bottom plate; 120-a second mold body; 121-a second bottom wall; 122-a second sidewall; 123-a second protrusion; 124-a second opening; 125-a limiting groove; 126-a limiting plate; 127-a limit side plate; 128-a limiting groove; 130-surrounding mould cavity; 140-a limit protrusion; 150-a first via; 160-a demolding hole; 210-an elastic limit ring; 221-fastening holes; 222-a fastener; 231-an elastic clamp; 232-connecting plate; 233-adjusting the long hole; 234-a tension member; 241-fastening clamping grooves; 242-first engaging end; 243-second engaging end; 244-support bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise explicitly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; either directly or through an intervening medium, or through internal communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and fig. 2, the present invention discloses a denture plaster model casting box, including a first mold body 110 and a second mold body 120, wherein the first mold body 110 includes a first bottom wall 111 and a first side wall 112, the second mold body 120 includes a second bottom wall 121 and a second side wall 122, the first mold body 110 and the second mold body 120 are assembled to form the casting box 100, the first mold body 110 and the second mold body 120 enclose a casting mold cavity 130, the first mold body 110 is provided with a first protrusion 113 and a first opening 114, and the second mold body 120 is provided with a second protrusion 123 and a second opening 124; after the first mold body 110 and the second mold body 120 are assembled into the surrounding mold pouring box 100, the first protrusion 113 and the second protrusion 123 are assembled into the limiting protrusion 140, and the first opening 114 and the second opening 124 are assembled into the first through hole 150 for placing the transfer rod; the mold further comprises a limiting part for controlling the splicing and positioning of the first mold body 110 and the second mold body 120, and a fastening part for fastening the spliced first mold body 110 and the second mold body 120.

The using steps of the surrounding mould filling box of the scheme are as follows:

1) placing a transfer rod 200 with a silicone rubber transfer mold at the first opening 114; the silica gel impression plate is provided with a dental model in advance at the false tooth to be processed.

2) The second mold body 120 is close to the first mold body 110, under the limitation of the limiting part, the first mold body and the second mold body are accurately spliced to form the surrounding mold filling box 100, and the first bottom wall 111, the second bottom wall 121, the first side wall 112 and the second side wall 122 surround the surrounding mold cavity 110; the first bulge 113 and the second bulge 123 are spliced to form a limiting bulge 140, and the limiting bulge 140 is used for limiting the silicon rubber transfer mold; so that the silicone rubber transfer mold is stably limited in the limiting protrusion 140 and the groove surrounded by the first side wall 112 and the second side wall 122, and the transfer rod is limited in the first through hole surrounded by the first opening 114 and the second opening 124; the accuracy of pouring the gypsum model is ensured.

3) Fastening the first mold body 110 and the second mold body 120 after the splicing by using a fastening part; so that the first mold body 110 and the second mold body 120 are tightly spliced, and gypsum liquid is prevented from flowing out of a splicing seam where the first mold body 110 and the second mold body 120 are spliced.

4) And pouring liquid gypsum into the surrounding mould cavity 110, oscillating to discharge air bubbles, and standing for moulding.

5) And releasing the fastening part, and separating the first mold body 110 and the second mold body 120 to obtain the plaster model, wherein the first mold body and the second mold body can be recycled.

In order to explain the technical solution of the present invention in detail, the present application is illustrated in the following examples.

In the case of the example 1, the following examples are given,

as shown in fig. 1 to 4, in this embodiment, the limiting portion includes at least one limiting boss 115 disposed on the outer side surface of the first mold body 110, a limiting plate 126 is disposed on the outer side surface of the second mold body 120, a corresponding number of limiting grooves 125 are disposed on the limiting plate 126 at positions corresponding to the limiting bosses 115, and during the splicing, the limiting bosses 115 can slide in the limiting grooves 125 until the first mold body contacts with the second mold body to complete the splicing. When the first mold body 110 and the second mold body 120 are separated, the limiting projection 115 slides out of the limiting groove 125 until the two are separated. The matching of the limit boss 115 and the limit groove 125 can limit the vertical deviation of the first mold body 110 and the second mold body 120, and the accuracy of pouring a gypsum model is ensured.

In this embodiment, as shown in fig. 3 again, the fastening portion includes at least one elastic limiting ring 210 sleeved on the outer wall of the surrounding mold pouring box 100, and the elastic limiting ring may be a rubber ring, a rubber band, or the like, which has elasticity and can be sleeved on the outer wall of the surrounding mold pouring box 100, and the first mold body 110 and the second mold body 120 can be tightly spliced due to its own contraction.

In the case of the example 2, the following examples are given,

in this embodiment, the limiting portion is the same as that in embodiment 1, as shown in fig. 5 to 7, the fastening portion includes a fastening hole 221 disposed on the limiting plate 126, the fastening hole 221 is disposed toward the limiting groove 125, a fastening member 222 is screwed into the fastening hole 221, when the first mold body 110 and the second mold body 120 are assembled, the limiting boss 115 is inserted into the limiting groove 125, the fastening member 222 is rotated to abut against the limiting boss 115, so that the limiting boss 115 is fixed in the limiting groove 125, and the first mold body 110 and the second mold body 120 are fastened and assembled, when the mold needs to be disassembled after the injection is completed, the fastening member 222 is screwed out from the fastening hole 221, the limiting effect of the fastening member 222 on the limiting boss 115 is released, and the limiting boss 115 can be separated from the limiting groove 125, so that the first mold body 110 and the second mold body 120 can be separated. In actual use, the fastener can be selected from a workpiece which can be screwed forward by a fastening bolt and the like.

In the case of the example 3, the following examples are given,

in this embodiment, the limiting portion is the same as that in embodiment 1, as shown in fig. 8, the fastening portion includes an elastic band 231, the elastic band 231 is of an open end structure, after the first mold body 110 and the second mold body are assembled, the elastic band 231 is sleeved on the outer side wall of the surrounding mold filling box 100, two sides of the open end of the elastic band 231 are respectively provided with a connecting plate 232, the connecting plate 232 is respectively provided with an adjusting long hole 233, a tensioning member 234 penetrates through the adjusting long hole 233, the tensioning member 234 can tension the two connecting plates 232 so that the elastic band 231 can firmly assemble the first mold body 110 and the second mold body 120 on two sides of the surrounding mold filling box 100, when the fastening portion needs to be released, the tensioning member 234 is released to tension the connecting plates, and then the elastic band 231 is removed from the outer wall of the surrounding mold filling box 100. In the actual use process, the tightening member 234 may be a tightening bolt inserted into the adjustment slot, or may directly use a tie, a wire, or the like, as long as the tightening and releasing of the two connection plates 232 can be achieved.

In the case of the example 4, the following examples are given,

in this embodiment, the stopper portion and the fastening portion are different from those in embodiments 1 to 3. As shown in fig. 9 to 12, the limiting portion includes a limiting bottom plate 116 disposed at the bottom of the first mold body 110, an upper plane of the limiting bottom plate 116 is flush with bottom surfaces of the first mold body 110 and the second mold body 120, the limiting portion further includes a limiting side plate 127 disposed on an upper outer side wall of the second mold plate 120, the limiting side plate 127 and the second side wall 122 form a limiting groove 128, and after the assembly, the first side wall 112 is located in the limiting groove 128. The first mold body 110 and the second mold body 120 can be precisely assembled under the restriction of the restriction bottom plate 116, the restriction side plate 127 and the restriction groove 128.

In this embodiment, as shown in fig. 11 again, the fastening portion includes a fastening slot 241 disposed on the first sidewall 112, a first engaging end 242 is further disposed on a side of the fastening slot 241 facing the second mold body 120, the first engaging end 242 is a wedge-shaped step, a second engaging end 243 is disposed on the corresponding limiting side plate 127, the second engaging end 243 is disposed opposite to the surrounding mold cavity 130, when the first mold body 110 and the second mold body 120 are assembled, the second engaging end 243 enters the fastening slot 241 along the wedge-shaped step and engages with the first engaging end 242, so as to fasten the first mold body 110 and the second mold body 120, and prevent the first mold body 110 and the second mold body 120 from being separated during the injection process.

When the pouring is completed, the limitation of the fastening portion on the first mold body 110 and the second mold body 120 needs to be removed, and at this time, the first engaging end 242 may be separated from the second engaging end 243 by using an external force to remove the engagement of the two ends; the outer plate of the fastening groove 241 may be detachably provided with the first side wall 112, and when the restriction of the fastening portion needs to be released, the outer plate may be detached from the first side wall 112 through the fastening groove 241. In the present embodiment, the cross section of the fastening slot 241 in the horizontal direction is rectangular, the length a along the direction of the first sidewall 112 is greater than the length b perpendicular to the direction of the first sidewall 112, a supporting rod 244 is inserted into the fastening slot, the cross section of the supporting rod 244 in the horizontal direction is a smooth shape, such as an ellipse, and the length of the smooth shape along the direction of the first sidewall 112 is greater than the length perpendicular to the direction of the first sidewall 112, the supporting rod 244 can rotate in the fastening slot 241, when the supporting rod 244 rotates in the fastening slot 241, the supporting rod 244 can jack up the sidewall where the first engaging end 242 is located away from the first sidewall 112, so that the second engaging end 243 can be released from the first engaging end 242, and the first mold body 110 can be separated from the second mold body 120; when the support rod 244 is rotated again, the fastening groove 110 is restored to its original shape. To facilitate the rotation of the support rod 244, a rotary grip may be provided at the top end of the support rod 244.

In the above 4 embodiments, the first bottom wall 111 and the second bottom wall 120 are each provided with a demolding hole 160 for facilitating demolding.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization of those skilled in the art; where combinations of features are mutually inconsistent or impractical, such combinations should not be considered as being absent and not within the scope of the claimed invention.