Injection mold with easy demolding

Abstract

The utility model discloses injection mold convenient to demould, including lower mould and upper mould, the lower mould top is provided with lower mould groove, and the upper mould bottom is provided with upper mould groove, the top right side of upper mould is fixed with the injection pipe of upper mould groove intercommunication of embedding, and the lower mould and upper mould are installed with the opening and closing support double demoulding support mechanism. The utility model discloses a series of structure is provided, and it is convenient for the injection molding product that is jammed in the upper mould groove or lower mould groove is extruded and demoulded automatically when the upper mould continues to move up after opening the mould, realizes the effect that the upper and lower integrated demoulding is stably carried out, whether the injection molding product is jammed in the upper mould or lower mould, can effectively carry out the demoulding work, improves the demoulding effect comprehensiveness, and through the mode of the upper moving force of the upper mould opening the mould is combined and is applied in the mode of collaborative interfitting, need not to set up power drive equipment separately to carry out the demoulding work, avoids the phenomenon that another larger increase energy consumption, reduces long -term use cost.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold that facilitates demolding. Background Technology

[0002] Injection molds are tools used to produce plastic products. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting molten plastic into the mold cavity under high pressure by an injection molding machine, and then extruding, cooling and solidifying it to obtain the molded product. In traditional molds, after the mold is opened, workers need to manually pry the product out of the lower mold. In order to improve demolding efficiency, some molds will also install an ejector structure on the lower mold to push the product out of the mold.

[0003] However, simply setting an ejector structure on the lower mold still has some shortcomings in use: 1. (Since some injection molds have mold grooves on both the lower and upper molds, and the molded product is formed by the upper and lower mold grooves together, the molded product may sometimes get stuck inside the upper mold when the mold is opened), installing an ejector structure only on the lower mold cannot stably perform the demolding work of the upper and lower molds as a whole. In the application of injection molds with mold grooves on both the upper and lower molds, the overall demolding effect is not ideal; 2. (The traditional method of setting a separate drive motor to drive the ejector structure to move upward on the lower mold for demolding, such as the injection mold for easy demolding disclosed in authorization announcement number CN219583425U), cannot effectively combine with the upward moving force when the upper mold is opened to automatically perform the demolding work, resulting in a significant increase in energy consumption and a higher long-term use cost; In view of this, this application proposes an injection mold for easy demolding to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide an injection mold that facilitates demolding, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an injection mold that facilitates demolding, comprising a lower mold and an upper mold, wherein the lower mold has a lower mold groove at its top and the upper mold has an upper mold groove at its bottom, and an injection tube connected to the upper mold groove is embedded and fixed on the top right side of the upper mold, and a double demolding support mechanism for opening and closing is installed on the lower mold and the upper mold.

[0006] The opening and closing support dual demolding support mechanism includes:

[0007] U-shaped support, fixedly connected to the bottom of the lower mold;

[0008] The box-shaped guide seats consist of two sets and are fixedly connected to the top of the lower mold. The two box-shaped guide seats are open on the adjacent side and bottom. The upper mold is slidably sleeved on the two box-shaped guide seats.

[0009] The top plate is fixedly connected to the top of the two box-shaped guide seats;

[0010] An electric telescopic rod is embedded and fixed at the bottom of the top plate, and the extended end of the electric telescopic rod is fixedly connected to the top of the upper mold; the electric telescopic rod is used to drive the upper mold to move up and down to perform mold closing and opening operations;

[0011] The self-resetting upper extrusion demolding component is slidably embedded in the top of the upper mold and makes active contact with the top of the top plate. When the injection molded product is stuck in the upper mold groove, the self-resetting upper extrusion demolding component is used to automatically extrude and demold the injection molded product stuck in the upper mold groove as the upper mold continues to move upward after the mold is opened.

[0012] The self-resetting lower extrusion demolding component is set inside the U-shaped support and is movably embedded in the bottom inner wall of the lower mold groove;

[0013] The L-shaped pull rods are in two sets and are respectively set in corresponding box-shaped guide seats. The top inner walls of the two L-shaped pull rods are in movable contact with the top of the upper mold, and the bottom ends of the two L-shaped pull rods are fixedly connected to the self-resetting lower extrusion demolding assembly. The L-shaped pull rods are used to be squeezed and moved upward by the upper mold when it continues to move upward after the mold opens. When the injection molded product is stuck in the upper mold groove, the L-shaped pull rods are automatically pushed and demolded by the upward extrusion driven by the continued upward movement after the mold opens.

[0014] Preferably, the self-resetting upper extrusion demolding assembly includes a demolding rod that is slidably embedded on the top left side of the upper mold and in movable contact with the bottom of the top plate. The bottom end of the demolding rod is flush with the top inner wall of the upper mold groove. A support sleeve is slidably sleeved on the demolding rod. A first spring is fixedly connected between the bottom of the support sleeve and the top of the upper mold. The first spring is movably sleeved on the demolding rod. A T-shaped screw is tightly contacted on the left side of the demolding rod. A threaded hole for threaded connection with the T-shaped screw is opened on the left side of the support sleeve.

[0015] Preferably, the self-resetting lower extrusion demolding assembly includes a lifting plate disposed within a U-shaped support and in movable contact with its bottom inner wall. T-shaped push rods are movably embedded on both sides of the bottom inner wall of the lower mold groove. The bottom ends of the two T-shaped push rods extend into the U-shaped support and are fixedly connected to the top of the lifting plate. Two second springs are fixedly connected between the top of the lifting plate and the bottom of the lower mold. The second springs are movably sleeved on the corresponding T-shaped push rods. The top of the lifting plate is fixedly connected to the bottom ends of the two L-shaped pull rods.

[0016] Preferably, rectangular guide holes are provided on both sides of the top of the lower mold, and the inner wall of the rectangular guide hole slides and fits with the outer side of the corresponding L-shaped pull rod.

[0017] Preferably, rectangular sliding holes are provided on both sides of the top of the upper mold, and the inner wall of the rectangular sliding hole slides and fits with the outer side of the corresponding box-shaped guide seat.

[0018] Preferably, a rectangular through hole is provided on the top right side of the top plate, located above the injection tube.

[0019] Preferably, two T-shaped through holes are provided on the bottom inner wall of the lower mold groove, and the T-shaped push rod is movably sleeved in the corresponding T-shaped through hole, with the top of the T-shaped push rod flush with the bottom inner wall of the lower mold groove.

[0020] Preferably, the upper mold has a vertical guide hole on the top left side that slides with the outer side of the demolding pressure rod.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. Through the combination of the upper mold, lower mold, box-shaped guide seat, top plate and electric telescopic rod, the upper mold can be driven to move up and down to perform mold closing and opening operations;

[0023] 2. Through the coordinated arrangement of the upper mold, lower mold, box-shaped guide seat, top plate, electric telescopic rod, self-resetting upper extrusion demolding component, and self-resetting lower extrusion demolding component, the upper mold can automatically extrude and demold the injection molded product stuck in the upper or lower mold groove by using its lifting force when the upper mold continues to move upward after the mold opens. By using the method that extrusion demolding can be performed at both the upper and lower parts during mold opening, the demolding work can be effectively carried out regardless of whether the injection molded product is stuck in the upper or lower mold, achieving a stable effect of demolding the upper and lower parts in one piece and improving the overall demolding effect.

[0024] In addition, by using the lifting force during mold opening to automatically demold, it can effectively combine the upward moving force of the upper mold during mold opening for coordinated application. There is no need to set up a separate electric drive device for demolding, which ensures demolding while avoiding a significant increase in energy consumption and reducing long-term use costs.

[0025] This invention features a series of structures that allow the upper mold to automatically expel the injection-molded product stuck in the upper or lower mold groove by utilizing its lifting force as the upper mold continues to move upward after mold opening. This achieves a stable, integrated demolding effect, effectively demolding the product regardless of whether it is stuck in the upper or lower mold. This improves the overall demolding effect. Furthermore, by combining the upward movement force of the upper mold during mold opening with a coordinated application, there is no need for a separate electrically driven device for demolding, avoiding a significant increase in energy consumption and reducing long-term operating costs. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of the injection mold for easy demolding proposed in this utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0028] Figure 3 This is a schematic diagram of the main sectional view of the injection mold for easy demolding proposed in this utility model.

[0029] In the diagram: 1. Upper mold; 101. Upper mold groove; 2. Lower mold; 201. Lower mold groove; 3. Box-shaped guide seat; 301. Top plate; 302. Electric telescopic rod; 4. Vertical guide hole; 401. Demolding pressure rod; 402. Support sleeve; 403. T-shaped screw; 404. First spring; 5. U-shaped support; 501. T-shaped top rod; 502. Second spring; 503. Lifting plate; 504. L-shaped pull rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1 to 3 As shown, the injection mold for easy demolding proposed in this embodiment includes a lower mold 2 and an upper mold 1. The lower mold 2 is provided with a lower mold groove 201 at the top, and the upper mold 1 is provided with an upper mold groove 101 at the bottom. An injection tube connected to the upper mold groove 101 is embedded and fixed on the top right side of the upper mold 1. The lower mold 2 and the upper mold 1 are equipped with a double demolding support mechanism for opening and closing.

[0032] The opening and closing support double demolding support mechanism includes:

[0033] U-shaped support 5 is fixedly connected to the bottom of the lower mold 2;

[0034] The box-shaped guide seat 3 consists of two sets and is fixedly connected to the top of the lower mold 2. The two box-shaped guide seats 3 are open on the adjacent side and bottom. The upper mold 1 is slidably fitted on the two box-shaped guide seats 3. The upper mold 1 has rectangular sliding holes on both sides of the top. The inner wall of the rectangular sliding hole is slidably fitted with the outer side of the corresponding box-shaped guide seat 3, which plays the role of vertical sliding guide for the upper mold 1.

[0035] The top plate 301 is fixedly connected to the top of the two box-shaped guide seats 3. A rectangular through hole located above the injection tube is opened on the right side of the top of the top plate 301.

[0036] The electric telescopic rod 302 is embedded and fixed at the bottom of the top plate 301, and the extended end of the electric telescopic rod 302 is fixedly connected to the top of the upper mold 1; the electric telescopic rod 302 is used to drive the upper mold 1 to move up and down to perform mold closing and mold opening operations.

[0037] The self-resetting upper extrusion demolding component is slidably embedded in the top of the upper mold 1 and makes active contact with the top of the top plate 301; when the injection molded product is stuck in the upper mold groove 101, the self-resetting upper extrusion demolding component is used to automatically extrude and demold the injection molded product stuck in the upper mold groove 101 when the upper mold 1 continues to move upward after the mold is opened.

[0038] The self-resetting lower extrusion demolding component is set inside the U-shaped support 5 and is movably embedded in the bottom inner wall of the lower mold groove 201;

[0039] Two sets of L-shaped pull rods 504 are respectively set in the corresponding box-shaped guide seats 3. The top inner walls of the two L-shaped pull rods 504 are in movable contact with the top of the upper mold 1. The bottom ends of the two L-shaped pull rods 504 are fixedly connected to the self-resetting lower extrusion demolding assembly. Rectangular guide holes are opened on both sides of the top of the lower mold 2. The inner walls of the rectangular guide holes slide and fit with the outer sides of the corresponding L-shaped pull rods 504, which plays a role in guiding the vertical sliding of the L-shaped pull rods 504. The L-shaped pull rods 504 are used to be squeezed and moved upward when the upper mold 1 continues to move upward after the mold is opened. When the injection molded product is stuck in the upper mold groove 101, the L-shaped pull rods 504 are automatically pushed and demolded when they are driven to move upward by the upward extrusion after the mold is opened.

[0040] It should be noted that the electric telescopic rod 302 is equipped with a switch and is electrically connected to an external drive power source via a flexible wire. In addition, the state shown in the figure is when the extended end of the electric telescopic rod 302 still has an upward retraction of 2-3 cm, and is not in the fully reset state.

[0041] Furthermore, the self-resetting upper extrusion demolding assembly includes a demolding rod 401 that is slidably fitted on the top left side of the upper mold 1 and in movable contact with the bottom of the top plate 301. The top left side of the upper mold 1 has a vertical guide hole 4 that slides and fits on the outer side of the demolding rod 401, which serves to guide the demolding rod 401 vertically. The bottom end of the demolding rod 401 is flush with the top inner wall of the upper mold groove 101. A support sleeve 402 is slidably fitted on the demolding rod 401. A first spring 404 is fixedly connected between the bottom of the support sleeve 402 and the top of the upper mold 1. The first spring 404 is movably fitted on the demolding rod 401. A T-shaped screw 403 is tightly pressed and contacted on the left side of the demolding rod 401. A threaded hole that is threadedly screwed into the T-shaped screw 403 is opened on the left side of the support sleeve 402.

[0042] In this embodiment, through the cooperation of the demolding rod 401, the support sleeve 402, the first spring 404, and the T-shaped screw 403, when the upper mold 1 moves upward to open and the demolding rod 401 moves upward to contact the top plate 301, the demolding rod 401 is blocked and restricted by the top plate 301. At this time, the upper mold 1, which continues to move upward, slides upward on the demolding rod 401 and compresses the first spring 404, so that the bottom end of the demolding rod 401 enters the upper mold groove 101, squeezing out the injection molded product stuck inside it. This achieves the effect of automatically squeezing out the injection molded product stuck in the upper mold groove 101 when the upper mold 1 continues to move upward after opening the mold. Subsequently, when the upper mold 1 is controlled to move downward again, under the elastic force of the first spring 404 in the compressed state, the support sleeve 402 drives the bottom end of the demolding rod 401 to move out of the upper mold groove 101 for reset. If prolonged use leads to fatigue and weakening of the first spring 404, resulting in the inability to effectively ensure the reset of the demolding rod 401, the operator can reverse the rotation of the T-shaped screw 403 to shift it to the left and separate it from the demolding rod 401. This allows the support sleeve 402 to be pressed downwards, sliding down on the demolding rod 401 and compressing the first spring 404. This changes the initial compression of the first spring 404, thereby altering its supporting elasticity on the support sleeve 402 and the demolding rod 401. After proper adjustment, the T-shaped screw 403 is rotated forward to press the demolding rod 401 to the right, locking the support sleeve 402. This allows for flexible adjustment of the supporting elasticity on the demolding rod 401 and support sleeve 402, reducing the likelihood of the bottom of the demolding rod 401 not being flush with the inner wall of the upper mold groove 101 due to weakening of the first spring 404, thus improving its service life.

[0043] Furthermore, the self-resetting lower extrusion demolding assembly includes a lifting plate 503 disposed within the U-shaped support 5 and in movable contact with its bottom inner wall. T-shaped push rods 501 are movably fitted on both sides of the bottom inner wall of the lower mold groove 201. Two T-shaped through holes are formed on the bottom inner wall of the lower mold groove 201, and the T-shaped push rods 501 are movably fitted into the corresponding T-shaped through holes. The top of the T-shaped push rods 501 is flush with the bottom inner wall of the lower mold groove 201, allowing the T-shaped push rods 501 to pass through from top to bottom and providing vertical sliding guidance. The bottom ends of both T-shaped push rods 501 extend into the U-shaped support 5 and are fixedly connected to the top of the lifting plate 503. Two second springs 502 are fixedly connected between the top of the lifting plate 503 and the bottom of the lower mold 2. The second springs 502 are movably fitted onto the corresponding T-shaped push rods 501. The top of the lifting plate 503 is fixedly connected to the bottom ends of two L-shaped pull rods 504.

[0044] In this embodiment, through the cooperation of the lifting plate 503, the T-shaped ejector rod 501, and the second spring 502, when the upper mold 1 continues to move upward after the mold is opened and the L-shaped pull rod 504 is pushed upward, the two L-shaped pull rods 504 drive the lifting plate 503 to move upward and compress the two second springs 502. The lifting plate 503 drives the two T-shaped ejector rods 501 to push the injection molded product stuck in the lower mold groove 201 upward. When the injection molded product is stuck in the lower mold groove 201, the effect of automatically pushing and demolding the injection molded product by using the mold opening lifting force is achieved during mold opening.

[0045] The usage method of this embodiment is as follows: When using the injection mold that facilitates demolding, the electric telescopic rod 302 is activated in the forward direction to drive the upper mold 1 to slide downward on the two box-shaped guide seats 3 and perform mold closing work with the lower mold 2. After injection molding and forming through the injection tube, the electric telescopic rod 302 is activated in the reverse direction to drive the upper mold 1 to move upward to open the mold. When the upper mold 1 moves upward to open the mold and drives the demolding pressure rod 401 to move upward to contact the top plate 301, the demolding pressure rod 401 is blocked by the top plate 301. When the upper mold 1, driven upward by the electric telescopic rod 302, continues to slide upward on the demolding pressure rod 401 and compresses the first spring 404, causing the bottom end of the demolding pressure rod 401 to penetrate into the upper mold groove 101, squeezing out the injection-molded product stuck inside. This achieves the effect of automatically squeezing and demolding the injection-molded product stuck in the upper mold groove 101 when the upper mold 1 continues to move upward after mold opening; wherein, when the upper mold 1 continues to move upward after mold opening, it also squeezes and drives the upper mold 1 to release the product. The L-shaped pull rod 504 moves upward, and the two L-shaped pull rods 504 drive the lifting plate 503 to move upward, compressing the two second springs 502. The lifting plate 503 drives the two T-shaped push rods 501 to push the injection molded product stuck in the lower mold groove 201 upward, realizing the effect of automatically pressing and demolding the injection molded product stuck in the lower mold groove 201 when the mold is opened. By using the method of extrusion demolding at both the upper and lower parts when the mold is opened, the demolding work can be effectively carried out regardless of whether the injection molded product is stuck in the upper mold 1 or the lower mold 2, achieving a stable effect of demolding the upper and lower parts in one piece, improving the overall demolding effect. In addition, by using the lifting force when the mold is opened to automatically demold, the method of demolding can be effectively combined with the upward moving force when the upper mold 1 is opened for coordinated application. There is no need to set up a separate electric drive device for demolding work, ensuring demolding while avoiding a significant increase in energy consumption and reducing long-term use costs.

[0046] When the upper mold 1 is moved down again, the first spring 404, under its compressed state, drives the support sleeve 402 to move the bottom end of the demolding rod 401 out of the upper mold groove 101 for reset. When the upper mold 1 moves down and releases the lifting force on the L-shaped pull rod 504, the second spring 502, under its compressed state, drives the lifting plate 503 to move down and reset. The lifting plate 503 then drives the T-shaped ejector rod 501 to move down and reset, allowing for another injection molding operation. If, after prolonged use, the first spring 404 becomes fatigued and its elasticity weakens, preventing the demolding rod 401 from effectively resetting, the operator can reverse the rotation of the T-shaped screw 403 to shift it to the left and engage the ejector rod. When the molding rod 401 is separated, the support sleeve 402 can be pressed down to slide downwards on the demolding rod 401, compressing the first spring 404 downwards. This changes the initial compression degree of the first spring 404, thereby altering its supporting elastic force on the support sleeve 402 and the demolding rod 401. After proper adjustment, the T-shaped screw 403 is rotated forward to press the demolding rod 401 to the right, locking the support sleeve 402. This allows for flexible adjustment of the supporting elastic force on the demolding rod 401 and the support sleeve 402, reducing the possibility that the bottom of the demolding rod 401 may not be flush with the top inner wall of the upper mold groove 101 due to the weakening of the first spring 404's elasticity. This improves service life and subsequent stability.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection mold for easy demolding, comprising a lower mold (2) and an upper mold (1), wherein the lower mold (2) has a lower mold groove (201) at its top and the upper mold (1) has an upper mold groove (101) at its bottom, characterized in that: The upper mold (1) has an injection tube that is connected to the upper mold groove (101) embedded and fixed on the top right side. The lower mold (2) and the upper mold (1) are equipped with a double demolding support mechanism for opening and closing. The opening and closing support dual demolding support mechanism includes: U-shaped support (5) is fixedly connected to the bottom of the lower mold (2); Box-shaped guides (3) are in two sets and fixedly connected to the top of the lower mold (2). The two box-shaped guides (3) are open on the side and bottom of the two box-shaped guides (3). The upper mold (1) is slidably sleeved on the two box-shaped guides (3). The top plate (301) is fixedly connected to the top of the two box-shaped guide seats (3); An electric telescopic rod (302) is embedded and fixed at the bottom of the top plate (301), and the extended end of the electric telescopic rod (302) is fixedly connected to the top of the upper mold (1); The self-resetting upper extrusion demolding component is slidably embedded in the top of the upper mold (1) and makes active contact with the top of the top plate (301); The self-resetting lower extrusion demolding assembly is set inside the U-shaped support (5) and is movably embedded in the bottom inner wall of the lower mold groove (201); The L-shaped pull rods (504) are in two sets and are respectively set in the corresponding box-shaped guide seats (3). The top inner walls of the two L-shaped pull rods (504) are in active contact with the top of the upper mold (1), and the bottom ends of the two L-shaped pull rods (504) are fixedly connected to the self-resetting lower extrusion demolding assembly.

2. The injection mold for easy demolding according to claim 1, characterized in that: The self-resetting upper extrusion demolding assembly includes a demolding rod (401) that is slidably embedded on the top left side of the upper mold (1) and in movable contact with the bottom of the top plate (301). The bottom end of the demolding rod (401) is flush with the top inner wall of the upper mold groove (101). A support sleeve (402) is slidably sleeved on the demolding rod (401). A first spring (404) is fixedly connected between the bottom of the support sleeve (402) and the top of the upper mold (1). The first spring (404) is movably sleeved on the demolding rod (401). A T-shaped screw (403) is squeezed and contacted on the left side of the demolding rod (401). A threaded hole is opened on the left side of the support sleeve (402) for threaded connection with the T-shaped screw (403).

3. The injection mold for easy demolding according to claim 1, characterized in that: The self-resetting lower extrusion demolding assembly includes a lifting plate (503) disposed in the U-shaped support (5) and in movable contact with its bottom inner wall. T-shaped push rods (501) are movably embedded on both sides of the bottom inner wall of the lower mold groove (201). The bottom ends of the two T-shaped push rods (501) extend into the U-shaped support (5) and are fixedly connected to the top of the lifting plate (503). Two second springs (502) are fixedly connected between the top of the lifting plate (503) and the bottom of the lower mold (2). The second springs (502) are movably sleeved on the corresponding T-shaped push rods (501). The top of the lifting plate (503) is fixedly connected to the bottom ends of the two L-shaped pull rods (504).

4. The injection mold for easy demolding according to claim 1, characterized in that: The lower mold (2) has rectangular guide holes on both sides of its top, and the inner wall of the rectangular guide hole slides and fits with the outer side of the corresponding L-shaped pull rod (504).

5. The injection mold for easy demolding according to claim 1, characterized in that: The upper mold (1) has rectangular sliding holes on both sides of its top, and the inner wall of the rectangular sliding hole slides and fits with the outer side of the corresponding box-shaped guide seat (3).

6. The injection mold for easy demolding according to claim 1, characterized in that: The top right side of the top plate (301) has a rectangular through hole located above the injection tube.

7. The injection mold for easy demolding according to claim 3, characterized in that: Two T-shaped through holes are provided on the bottom inner wall of the lower mold groove (201). The T-shaped push rod (501) is movably sleeved in the corresponding T-shaped through hole, and the top of the T-shaped push rod (501) is flush with the bottom inner wall of the lower mold groove (201).

8. The injection mold for easy demolding according to claim 2, characterized in that: The upper mold (1) has a vertical guide hole (4) on the top left side that slides with the outer side of the demolding pressure bar (401).

Images