CN112356375A

CN112356375A - Demoulding driving mechanism and foam plastic forming device

Info

Publication number: CN112356375A
Application number: CN202011164530.1A
Authority: CN
Inventors: 时宏伟; 曾志华; 杨彬; 王勇
Original assignee: Dongguan Bach Precision Machinery Co ltd
Current assignee: Dongguan Bach Precision Machinery Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-02-12

Abstract

A demoulding driving mechanism and a foam plastic forming device are provided, the demoulding driving mechanism comprises: the device comprises a transverse frame, a demoulding frame, a chain transmission unit, a driving assembly and a locking assembly; the demoulding frame is connected with the transverse frame in a sliding way; the demoulding frame is provided with a demoulding baffle; the chain transmission unit is rotatably arranged on the cross frame and is in transmission connection with the demoulding driving assembly and the demoulding frame; the driving component comprises a transmission frame connected with the cross frame in a sliding manner and a sliding driving piece used for driving the transmission frame to move relative to the cross frame; the locking assembly is used for switching the transmission frame and the chain transmission unit between locking and separating. When the transmission frame and the chain transmission unit are unlocked, the chain transmission unit can freely move relative to the transmission frame, so that the position of the demolding frame relative to the transmission frame can be adjusted by moving the chain transmission unit, the transmission frame and the chain transmission unit are locked again after adjustment is completed, and the starting position and the stopping position of the moving range of the ejector pin can adapt to the installation position and the thickness size of the mold.

Description

Demoulding driving mechanism and foam plastic forming device

Technical Field

The invention relates to the technical field of foamed plastic processing, in particular to a demoulding driving mechanism and a foamed plastic forming device.

Background

The foamed plastic is a high polymer material formed by dispersing a large number of gas micropores in solid plastic, has the characteristics of light weight, heat insulation, sound absorption, shock absorption and the like, has dielectric properties superior to matrix resin, and has wide application range. The main steps of the foam molding process comprise: 1. injecting a plastic foam raw material into a mold cavity of a forming mold; introducing high-temperature steam gas into the liquid or melt plastic foam raw material; 3. the plastic foam raw material is foamed to generate micropores, and the micropore structure is fixed after the size of the plastic foam raw material is increased to a certain size, so that a molded foam plastic product is obtained.

In a foam molding apparatus, a molding die generally includes a male die and a female die, and a cavity is provided in the female die. After the foam plastic product is formed, the male die is separated from the female die, but the foam plastic product is still hidden in the die cavity of the female die. In order to take out the foamed plastic product from the mold cavity, the ejector pin penetrates into the hole site of the female mold by moving the demolding baffle plate with the ejector pin, so that the foamed plastic product in the mold cavity is pushed to fall off from the mold cavity.

The existing demoulding baffle is generally driven by a pull rod, and the stroke of a driving piece is difficult to adjust because the pull rod is generally driven by driving pieces such as an air cylinder or an oil cylinder, so that the existing demoulding baffle cannot adapt to moulds with different thickness and sizes during demoulding.

Disclosure of Invention

In view of this, it is necessary to provide a mold release driving mechanism and a foam molding apparatus, which are directed to the problem that molds having different thickness dimensions cannot be accommodated during mold release.

A demolding-drive mechanism comprising:

a cross frame;

the demolding frame is connected with the transverse frame in a sliding manner; the demolding frame is provided with a demolding baffle;

the chain transmission unit is rotatably arranged on the cross frame and is in transmission connection with the demolding driving assembly and the demolding frame;

the driving assembly comprises a transmission frame which is connected with the transverse frame in a sliding manner and a sliding driving piece which is used for driving the transmission frame to move relative to the transverse frame; and

a locking assembly for shifting the drive carrier and the chain drive unit between locked and unlocked.

According to the demoulding driving mechanism, when the transmission frame and the chain transmission unit are locked through the locking assembly, if the sliding driving piece drives the transmission frame to move, the chain transmission unit can drive the demoulding frame to move synchronously. Because the demoulding baffle is arranged on the demoulding frame, and the thimble is arranged on the demoulding baffle, under the condition that the demoulding frame moves close to the mould under the traction of the chain transmission unit, the thimble penetrates into the hole position of the mould cavity to push the foam plastic product in the mould cavity; when the locking between the transmission frame and the chain transmission unit is released, the chain transmission unit can freely move relative to the transmission frame, so that the position of the demolding frame relative to the transmission frame can be adjusted by moving the chain transmission unit, the transmission frame and the chain transmission unit are locked again after the adjustment is completed, the starting position and the stopping position of the moving range of the ejector pin can adapt to the installation position and the thickness size of the mold, and the demolding treatment can be carried out on the molds with different thickness sizes.

In one embodiment, the locking assembly comprises a carrier plate which is connected with the transmission frame in a sliding mode, a traction clamping plate which is connected with the carrier plate, and a locking driving piece which is used for driving the traction clamping plate to move away from or close to the chain transmission unit; the traction clamping plate is used for being meshed with the chain transmission unit; therefore, the chain transmission unit and the transmission frame can be locked and separated.

In one embodiment, the locking assembly further comprises a frame connected to the transmission frame; the carrier plate is movably accommodated in the frame body; the carrier plate is provided with a convex block; the frame body is provided with a limiting groove, the limiting groove extends along the moving direction of the traction clamping plate, and the bump is accommodated in the limiting groove; thereby guaranteeing the sliding stability of the carrier plate and the traction force of the carrier plate to the chain transmission unit.

In one embodiment, the traction card plate comprises a plate-shaped part connected with the carrier plate and a tooth-shaped part extending from the plate-shaped part; the tooth-shaped part is arranged in a clearance hole of the chain transmission unit in a penetrating way; thereby can realize the meshing of traction cardboard and chain drive unit.

In one embodiment, the chain drive unit comprises a first chain and a second chain; the transverse frame is connected with a first supporting component and a second supporting component; the first chain is rotatably arranged on the first supporting assembly, and the second chain is rotatably arranged on the second supporting assembly; the part of the first chain is connected with the demoulding frame, and the part of the second chain is connected with the demoulding frame; the first chain and the second chain drive the demolding frame to move along the cross frame from two sides respectively; thereby ensuring the reliability of the demoulding driving mechanism.

In one embodiment, the first support assembly comprises a first side seat connected with the cross frame, a second side seat connected with the cross frame, a first support gear rotatably arranged in the first side seat and a second support gear rotatably arranged in the second side seat; the first supporting gear and the second supporting gear are respectively meshed with the first chain; the first supporting gear and the second supporting gear are respectively abutted against the inner ring of the first chain; the second supporting assembly comprises a third side seat connected with the transverse frame, a fourth side seat connected with the transverse frame, a third supporting gear rotationally arranged in the third side seat and a fourth supporting gear rotationally arranged in the fourth side seat; the third supporting gear and the fourth supporting gear are respectively meshed with the second chain; the third supporting gear and the fourth supporting gear are respectively abutted against the inner ring of the second chain; thereby the stability of first chain and second chain can be guaranteed.

In one embodiment, the method further comprises at least one of the following technical characteristics:

the demolding driving mechanism further comprises a first synchronous rod, and the first synchronous rod is connected with the first supporting gear and the third supporting gear respectively;

the demolding driving mechanism further comprises a second synchronous rod, and the second synchronous rod is connected with the second supporting gear and the fourth supporting gear respectively; thereby avoiding the deviation of the demoulding frame caused by the unbalance of the traction force.

In one embodiment, the cross frame comprises side bars arranged in pairs and a fixing bar connected between the side bars; the first chain and the second chain are respectively distributed along the side rods; the cross frame further comprises a reinforcing beam connected between the two side rods so as to improve the structural strength of the cross frame; thereby providing reliable support for the first and second support members.

In one embodiment, the inner side of the side rod is provided with an inner groove which extends along the length direction of the side rod; the first chain and/or the second chain are/is accommodated in the inner groove; thereby avoiding the movement of the first chain or the second chain being affected externally.

A foam molding apparatus comprising: the demolding driving mechanism is connected with a mold; the mould comprises a fixed mould part and a movable mould part, and a mould cavity is formed between the fixed mould part and the movable mould part; the fixed module is mounted on the cross frame, and the movable module is mounted on the transmission frame.

Drawings

FIG. 1 is a top view of a knockout drive mechanism according to one embodiment of the invention;

FIG. 2 is a cross-sectional view of the ejection drive mechanism shown in FIG. 1 in the direction AA;

FIG. 3 is an enlarged view of the knockout drive mechanism shown in FIG. 2 at B;

FIG. 4 is a schematic structural view of the locking assembly of FIG. 3;

FIG. 5 is a schematic view of the locking assembly of FIG. 3 at another angle;

FIG. 6 is a partial perspective view of the ejection drive mechanism shown in FIG. 1, wherein the drive assembly and the locking assembly are hidden;

FIG. 7 is a partial schematic view of the ejection drive mechanism of FIG. 6 with the side bars hidden;

FIG. 8 is an enlarged view of the knockout drive mechanism shown in FIG. 7 at C;

FIG. 9 is a schematic cross-sectional view of the side bar of FIG. 1, wherein the cross-sectional direction is perpendicular to the length direction of the side bar;

FIG. 10 is a view of the connection between the first chain and the second side block, wherein the first chain is offset from the normal operating position to show the edge configuration of the second support wheel.

The corresponding relation between each reference number and each meaning in the drawings is as follows:

20. a cross frame; 22. a side lever; 221. an inner groove; 222. a face-side strip portion; 223. a middle strip portion; 224. A vertical strip; 23. fixing the rod; 24. reinforcing the beam; 30. demoulding the mould frame; 31. a slide base; 32. an auxiliary frame body; 33. a main frame body; 34. a demoulding baffle plate; 35. a reinforcing rod; 36. a wheel set; 361. a load-bearing wheel; 362. a support wheel; 37. a driven pallet; 371. a plate body portion; 372. a tooth piece part; 40. a first chain; 50. a first support assembly; 51. a first side seat; 52. a second side seat; 54. a second support gear; 55. a first synchronization lever; 60. a drive assembly; 61. a transmission frame; 62. a sliding drive member; 70. a locking assembly; 71. a carrier plate; 711. a bump; 72. a traction clamping plate; 721. a plate-shaped portion; 722. a tooth-shaped portion; 73. locking the driving piece; 74. Switching a pressing plate; 75. a frame body; 751. defining a slot; 80. a second chain; 90. a second support assembly; 91. A third side seat; 92. and a fourth side seat.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention can be embodied in many different forms than those herein described and one skilled in the art can make similar modifications without departing from the spirit of the invention and it is therefore not limited to the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 10, a demolding driving mechanism according to an embodiment of the present invention is applied to a foam molding apparatus, the foam molding apparatus includes a mold having a mold cavity therein; the demoulding baffle 34 is provided with a thimble, and the demoulding driving mechanism is used for pushing the foam plastic product in the mould cavity to make the foam plastic product fall off. This drawing of patterns actuating mechanism includes: the transverse frame 20, the demoulding frame 30, the chain transmission unit, the driving component 60 and the locking component 70; the demoulding frame 30 is connected with the transverse frame 20 in a sliding way; the mold release frame 30 has a release baffle 34; the chain transmission unit is rotatably arranged on the cross frame 20 and is in transmission connection with the demoulding driving component 60 and the demoulding frame 30; the driving assembly 60 comprises a transmission frame 61 connected with the cross frame 20 in a sliding manner and a sliding driving piece 62 used for driving the transmission frame 61 to move relative to the cross frame 20; the locking assembly 70 is used to shift the transmission frame 61 and the chain drive unit between locking and unlocking.

When the transmission frame 61 and the chain transmission unit are locked by the locking assembly 70, if the sliding driving member 62 drives the transmission frame 61 to move, the chain transmission unit can drive the demolding frame 30 to move synchronously. Because the demoulding baffle 34 is arranged on the demoulding frame 30, and the thimble is arranged on the demoulding baffle 34, under the condition that the demoulding frame 30 is drawn by the chain transmission unit to move close to the mould, the thimble penetrates into the hole position of the mould cavity to push the foam plastic product in the mould cavity; when the locking between the transmission frame 61 and the chain transmission unit is released, the chain transmission unit can freely move relative to the transmission frame 61, so that the position of the demoulding frame 30 relative to the transmission frame 61 can be adjusted by moving the chain transmission unit, the transmission frame 61 and the chain transmission unit are locked again after the adjustment is completed, the initial position and the stop position of the moving range of the thimble can adapt to the installation position and the thickness dimension of the mould, and the demoulding treatment can be carried out on the moulds with different thickness dimensions.

Referring to fig. 3 to 5, in one of the manners, the locking assembly 70 includes a carrier plate 71 slidably connected to the transmission frame 61, a traction card 72 connected to the carrier plate 71, and a locking driving member 73 for driving the traction card 72 to move away from or close to each other; the traction sheave 72 is adapted to engage with a chain drive unit.

By the sliding connection of the carrier plate 71 and the transmission frame 61, the direction of the traction card 72 relative to the transmission frame 61 or the chain transmission unit can be kept unchanged during the movement. When the driving member 73 is locked to move the pulling plate 72 close to the chain transmission unit, the pulling plate 72 is engaged with the chain transmission unit 40, and the carrier plate 71 slides along the transmission frame 61 in a direction perpendicular to the length direction of the cross frame 20, so that the transmission frame 61 can drive the chain transmission unit and the stripper frame 30 to move through the pulling plate 72 when moving along the cross frame 20. When the driving member 73 is locked to move the pulling catch plate 72 away from the chain drive unit, the direct engagement between the pulling catch plate 72 and the chain drive unit is released, and the chain drive unit and the knockout frame 30 can move freely relative to the drive frame 61 along the length direction of the cross frame 20. The locking assembly 70 further includes a transfer platen 74 connected between the piston rod of the lock link actuator 73 and the carrier plate 71, and a traction card 72 is connected to the transfer platen 74.

Referring to fig. 4 and 5, in one of the above manners, the locking assembly 70 further includes a frame 75 connected to the transmission frame 61; the carrier plate 71 is movably accommodated in the frame 75; the carrier 71 has a bump 711; the frame 75 is provided with a limiting groove 751, the limiting groove 751 extends along the moving direction of the drawing clamping plate 72, and the projection 711 is accommodated in the limiting groove 751. The inner cavity of frame 75 and the limiting groove 751 act as a limitation to the moving direction of carrier plate 71, and the limiting groove 751 can prevent carrier plate 71 from separating from frame 75, thereby ensuring the sliding stability of carrier plate 71 and the traction force of carrier plate 71 to the chain drive unit.

Referring to fig. 4, in one of the above-mentioned manners, the pulling card 72 includes a plate portion 721 connected to the carrier plate 71 and a tooth portion 722 extending from the plate portion 721; the tooth 722 is inserted into the clearance hole of the chain drive unit.

Because the tooth-shaped part 722 is arranged in the clearance hole of the chain transmission unit in a penetrating way, the traction clamping plate 72 can be meshed with the chain transmission unit, when the transmission frame 61 and the traction clamping plate 72 are moved by the sliding driving piece 62, the tooth-shaped part 722 acts on the pin shaft of the chain transmission unit, and the traction clamping plate 72 drives the demoulding frame 30 to move towards the direction close to the female die through the chain transmission unit. Specifically, the plate-shaped portion 721 is fixed to the pressure plate by a screw member

Referring to fig. 1 and 2, in one embodiment, the sliding driving member 62 is a cylinder or an air cylinder; the main body of the slide driving member 62 is fixed to the cross frame 20, and the piston rod of the slide driving member 62 is connected to the transmission frame 61. When the piston rod of the sliding driving member 62 extends and contracts, the piston rod pushes the transmission frame 61 to move relative to the cross frame 20, and if the transmission frame 61 is locked with the chain transmission unit through the locking assembly 70, the release frame 30 can be driven to move within a predetermined range.

Referring to fig. 7, in one of the above-mentioned modes, the chain transmission unit includes a first chain 40 and a second chain 80; the cross frame 20 is connected with a first supporting component 50 and a second supporting component 90; the first chain 40 is rotatably mounted on the first support assembly 50, and the second chain 80 is rotatably mounted on the second support assembly 90; a part of the first chain 40 is connected with the demoulding frame 30, and a part of the second chain 80 is connected with the demoulding frame 30; the first chain 40 and the second chain 80 respectively drive the demolding frame 30 to move along the cross frame 20 from both sides.

Because the demolding frame 30 is simultaneously acted by the first chain 40 and the second chain 80, the stress of the first chain 40 can be reduced, the first chain 40 is prevented from being broken due to overlarge stress, and the structural reliability of the demolding driving mechanism is ensured. Specifically, the first chain 40 and the second chain 80 are parallel to each other to synchronously move the knockout frame 30. Specifically, the second chain 80 may be an end-to-end closed structure so as to straighten the main body of the second chain 80 from both ends while being able to pull the stripper frame 30 to move in the opposite direction by the second chain 80. Specifically, the first chain 40 and the second chain 80 may be closed structures connected end to end so as to straighten the body of the first chain 40 from both ends while being able to pull the mold release frame 30 to move in opposite directions by the first chain 40.

Referring to fig. 1 and 10, in one embodiment, the first supporting assembly 50 includes a first side seat 51 connected to the cross frame 20, a second side seat 52 connected to the cross frame 20, a first supporting gear rotatably disposed in the first side seat 51, and a second supporting gear 54 rotatably disposed in the second side seat 52; the first and second support gears 54 are engaged with the first chain 40, respectively; the first support gear and the second support gear 54 are respectively abutted against the inner ring of the first chain 40.

The second support assembly 90 includes a third side seat 91 connected to the cross frame 20, a fourth side seat 92 connected to the cross frame 20, a third support gear rotatably disposed in the third side seat 91, and a fourth support gear rotatably disposed in the fourth side seat 92; the third supporting gear and the fourth supporting gear are respectively engaged with the second chain 80; the third support gear and the fourth support gear are respectively abutted against the inner ring of the second chain 80.

Since the first and second supporting gears 54 and 54 are respectively abutted against the inner ring of the first chain 40, the first chain 40 can be tensioned to be nearly straightened by properly setting the distance between the first and second supporting gears 54, so as to facilitate the butt joint with the stripper plate 34 or the locking assembly 70. The first and second supporting gears 54 are engaged with the first chain 40, respectively, so that the installation stability of the first chain 40 can be improved, and the first chain 40 is prevented from being separated from the first supporting assembly 50. Similarly, the second support assembly 90 can improve the installation stability of the second chain 80, and prevent the second chain 80 from being separated from the second support assembly 90.

Referring to fig. 7, in one embodiment, the demolding driving mechanism further includes a first synchronization rod 55, and the first synchronization rod 55 is connected to the first supporting gear and the third supporting gear, respectively.

In one embodiment, the demolding driving mechanism further includes a second synchronization rod, and the second synchronization rod is connected to the second supporting gear 54 and the fourth supporting gear, respectively. Because the rotation of the first supporting gear and the third supporting gear is synchronous through the first synchronous rod 55 or the second synchronous rod, the synchronous movement of the first chain 40 and the second chain 80 can be ensured, the first chain 40 and the second chain 80 can both produce consistent traction force on the demolding frame 30, and the deviation of the demolding frame 30 caused by the unbalance of the traction force is avoided.

Referring to fig. 6, in one embodiment, the cross frame 20 includes side bars 22 arranged in pairs and a fixing bar 23 connected between the side bars 22; the first chain 40 and the second chain 80 are respectively distributed along the side bar 22; the cross frame 20 further includes a reinforcing beam 24 connected between the two side bars 22 to improve the structural strength of the cross frame 20.

In the present embodiment, the fixing rod 23 is connected to the end of the side lever 22 to avoid affecting the extension of the first chain 40 or the second chain 80 and to reduce the thickness of the cross frame 20. The first side holder 51 and the third side holder 91 are attached to one fixing rod 23, and the second side holder 52 and the fourth side holder 92 are attached to the other fixing rod 23. Thereby providing reliable support for the first support member 50 and the second support member 90. Because the reinforcing beam 24 is connected between the side bars 22, the deformation caused by the overlong length of the side bars 22 can be avoided, and the structural stability of the transverse frame 20 is ensured. In the present embodiment, the number of the reinforcing beams 24 is one, and the reinforcing beams 24 are connected to the middle portions of the side bars 22.

Referring to fig. 7 and 9, the inner side of the side bar 22 is provided with an inner groove 221, and the inner groove 221 extends along the length direction of the side bar 22; the first chain 40 and/or the second chain 80 are received in the inner groove 221.

The inner groove 221 is disposed on the side of the side bar 22 facing the other side bar 22, and the first chain 40 or the second chain 80 is received in the inner groove 221, so that the side bar 22 can be used to protect the first chain 40 or the second chain 80, and the movement of the first chain 40 or the second chain 80 is prevented from being influenced by the outside or from being entangled with other parts. Preferably, to provide protection for both the first chain 40 and the second chain 80, the first chain 40 is received in the inner groove 221 of one of the side bars 22 and the second chain 80 is received in the inner groove 221 of the other side bar 22.

The side bar 22 includes surface side strip portions 222 provided in pairs and a middle strip portion 223 connected between the two surface side strip portions 222; an inner groove 221 is formed between the two face-side strip portions 222, the inner groove 221 being located inside the intermediate strip portion 223; the side bar 22 further comprises a plurality of vertical bars 224 connected between the two face-side bar portions 222, the vertical bars 224 being located outside the intermediate bar portions 223. By forming the inner groove 221 between the two face-side bar portions 222, the inner groove 221 can be made to have a sufficient space to accommodate the first chain 40 or the second chain 80, while the weight of the side bar 22 can be reduced. The side bars 22 are i-shaped in cross-section and have high mechanical strength. The intermediate strip portion 223 is connected to the middle of the surface-side strip portion 222 on the upper side or the lower side, and the vertical strip 224 is connected between the outer edges of the surface-side strip portion 222, whereby the outer edges of the surface-side strip portion 222 are prevented from being deformed by pressure, and the mechanical strength of the side bar 22 can be further improved. Specifically, the vertical bars 224 are provided in plurality and are uniformly distributed along the length direction of the side bars 22, and the vertical bars 224 are welded to the surface-side bar-shaped portions 222, so that different positions on the surface-side bar-shaped portions 222 can be supported.

Referring to fig. 6 and 7, in particular, the mold stripping frame 30 includes sliding bases 31 slidably fitted over the side bars 22, auxiliary frame bodies 32 connected between the sliding bases 31, and a main frame body 33 connected to the auxiliary frame bodies 32. The main frame body 33 extends in the direction perpendicular to the cross frame 20; the first traction means are distributed along the crossbar 20 and are connected to the slide 31. The demolding frame 30 further includes a reinforcing rod 35 connected between the auxiliary frame body 32 and the main frame body 33; one end of the reinforcing rod 35 is abutted against the middle part of the main frame body 33; the reinforcing bar 35 is provided to be inclined in the longitudinal direction with respect to the main frame body 33 or the mold release baffle 34. The reinforcing rod 35 is arranged on one side of the main frame body 33, which is back to the demoulding baffle 34, and when the thimble of the demoulding baffle 34 is abutted against the foam plastic product in the mould cavity, the reinforcing rod 35 can strengthen the support of the auxiliary frame body 32 on the main frame body 33, so as to avoid the main frame body 33 and the auxiliary frame body 32 from being broken off due to the overlarge stress of the demoulding baffle 34.

Referring to fig. 7 and 8, the mold releasing frame 30 further includes a wheel set 36 connected to the sliding base 31, the wheel set 36 abuts against the upper side or the lower side of the side rod 22; the number of the wheel sets 36 is two or more, and a plurality of the wheel sets 36 are distributed along the length direction of the side bar 22.

The sliding seat 31 is contacted with the side rod 22 through the wheel set 36, so that direct friction between the sliding seat 31 and the side rod 22 is avoided, the abrasion of the sliding seat 31 or the side rod 22 is reduced, and the resistance of the demoulding frame 30 during movement is reduced. Because more than two wheel sets 36 are abutted against the upper side and the lower side of the side rod 22, the angle of the slide 31 relative to the side rod 22 can be kept unchanged in the process of moving relative to the side rod 22, the stripping baffle 34 is prevented from deflecting when stressed, and the thimble is prevented from being broken.

The wheel set 36 includes a bearing wheel 361 and a supporting wheel 362; the number of the wheel sets 36 in each slide 31 is two, wherein in the wheel sets 36 relatively close to the die cavity, the bearing wheels 361 abut against the upper sides of the side bars 22, and the supporting wheels 362 abut against the lower sides of the side bars 22; in the wheel set 36 relatively far from the cavity, the bearing wheel 361 abuts against the lower side of the side bar 22, and the support wheel 362 abuts against the upper side of the side bar 22.

Referring to fig. 7 and 8, the diameter of the bearing wheel 361 is larger than that of the supporting wheel 362, so that when the stripper plate 34 is deflected by the reverse force of the mold, the sliding seat 31 abuts against the side bar 22 via the bearing wheel 361, thereby reducing the pressure applied to the wheel set 36 or the side bar 22 and effectively prolonging the service life of the stripper mechanism.

In one embodiment, the wheel set 36 abuts the facings straps 222.

The present invention also provides a foam molding apparatus comprising: the demolding driving mechanism and a mold connected with the demolding driving mechanism are arranged on the mold; the mould comprises a fixed mould part and a movable mould part, and a mould cavity is formed between the fixed mould part and the movable mould part; the fixed module is mounted on the cross frame 20 and the mobile module is mounted on the drive frame 61.

The fixed module is arranged on the cross frame 20, the movable module is arranged on the transmission frame 61, the movable module can be arranged in a sliding way relative to the cross frame 20, and when a foam plastic product needs to be formed, the fixed module and the movable module abut against each other to form a relatively closed die cavity; when the molded foam plastic product needs to be separated from the mold cavity, the sliding driving part 62 drives the movable mold part to separate from the fixed mold part through the transmission frame 61; in the process of separating the movable module from the fixed module, the locking assembly 70 locks the transmission frame 61 with the first chain 40 or the second chain 80, so that the transmission frame 61 can simultaneously drive the demolding frame 30 to move, the ejector pins on the demolding baffle 34 synchronously penetrate into the fixed module, and the foamed plastic molded product is ejected from the mold cavity; the sliding driving piece 62 is used for driving the movable module and the demoulding baffle 34 to move at the same time, so that the structure of the foam plastic forming device can be simplified, and the investment cost of the device can be reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A demolding drive mechanism, characterized by comprising:

a cross frame;

2. The demolding driving mechanism as claimed in claim 1, wherein the locking assembly comprises a carrier plate slidably connected with the transmission frame, a traction card plate connected with the carrier plate, and a locking driving member for driving the traction card plate to move away from or close to the chain transmission unit; the traction clamping plate is used for being meshed with the chain transmission unit.

3. The demold drive mechanism of claim 2 wherein said locking assembly further comprises a frame connected to said drive frame; the carrier plate is movably accommodated in the frame body; the carrier plate is provided with a convex block; the frame body is provided with a limiting groove, the limiting groove extends along the moving direction of the traction clamping plate, and the protruding block is accommodated in the limiting groove.

4. The ejection drive mechanism of claim 2, wherein the traction card includes a plate portion connected to the carrier plate and a tooth portion extending from the plate portion; the tooth-shaped part is arranged in a clearance hole of the chain transmission unit in a penetrating way.

5. The demolding driving mechanism as claimed in claim 1, wherein the chain transmission unit includes a first chain and a second chain; the transverse frame is connected with a first supporting component and a second supporting component; the first chain is rotatably arranged on the first supporting assembly, and the second chain is rotatably arranged on the second supporting assembly; part of the first chain is connected with the demoulding frame, and part of the second chain is connected with the demoulding frame; the first chain and the second chain drive the demolding frame to move along the cross frame from two sides respectively.

6. The demold drive mechanism of claim 5 wherein said first support assembly includes a first side mount connected to said cross frame, a second side mount connected to said cross frame, a first support gear rotatably disposed in said first side mount, and a second support gear rotatably disposed in said second side mount; the first supporting gear and the second supporting gear are respectively meshed with the first chain; the first supporting gear and the second supporting gear are respectively abutted against the inner ring of the first chain; the second support assembly comprises a third side seat connected with the transverse frame, a fourth side seat connected with the transverse frame, a third support gear rotationally arranged in the third side seat and a fourth support gear rotationally arranged in the fourth side seat; the third supporting gear and the fourth supporting gear are respectively meshed with the second chain; the third supporting gear and the fourth supporting gear are respectively abutted against the inner ring of the second chain.

7. The ejection drive mechanism of claim 6, further comprising at least one of the following features:

the demolding driving mechanism further comprises a second synchronizing rod, and the second synchronizing rod is connected with the second supporting gear and the fourth supporting gear respectively.

8. The demold drive mechanism of claim 5 wherein said cross frame includes side bars arranged in pairs and a retaining bar connected between said side bars; the first chain and the second chain are respectively distributed along the side rods; the cross-frame further comprises a reinforcing beam connected between the two side bars to improve the structural strength of the cross-frame.

9. The ejector drive mechanism of claim 8, wherein the side bars are provided on the insides thereof with inner grooves extending in the length direction of the side bars; the first chain and/or the second chain are accommodated in the inner grooves.

10. A foam molding apparatus, comprising: the demolding driving mechanism and the mold connected with the demolding driving mechanism according to any one of claims 1 to 9; the mould comprises a fixed mould part and a movable mould part, and a mould cavity is formed between the fixed mould part and the movable mould part; the fixed module is mounted on the cross frame, and the movable module is mounted on the transmission frame.